Bacharach MultiZone, MultiZone HGM-MZ, MultiZone AGM-MZ, MultiZone CO2-MZ Installation & Operation Manual

UL 61010-1

Product Leadership • Trai ni ng • Service • Reli ability

MultiZone Gas Monitors

• HGM-MZ (H alogen)

• AGM-MZ (Ammonia)

• CO2-MZ (Carbon Dioxide)

Installation • Operation • Maintenance

CA N/CS A 22 .2 No. 61010.1

EN 14624

Instruction P/N: 3015-5074

Rev. 11

August 2013

Multi-Z one Gas Monitor s

WARRANTY

Bachar ach, Inc . warr ants to B uyer t hat at t he tim e of delive ry t hi s P roduc t wil l be fr ee from defect s in
material and manuf act ure and wil l conf orm subs tantial l y t o B acharac h Inc .’ s appl i cabl e s peci ficat i ons.
Bachar ach’ s li abi l i t y and B uyer’s rem edy under t hi s warr anty ar e l i m i ted t o t he repair or replacem ent, at
Bachar ach’ s opt i on, of t hi s P roduct or part s t hereof r eturned t o Sell er at the fac t ory of manufact ure and
shown t o Bac harach I nc. ’ s reas onabl e sat i sf act i on to have been defec t ive; provided that writt en notice of
the defec t shal l have been given by B uyer t o B acharac h Inc . within two (2) years aft er t he date o f delivery
of this P roduc t by Bac harach, Inc .
Bachar ach, Inc . warr ants to B uyer t hat i t wil l convey goo d title to t hi s P roduc t. B acharach’s li abi l i ty and
Buyer’s remedy under t hi s warranty o f t i t l e are l i m i t ed to t he remo val of any t i tle defec ts or, at the elect i on
of Bac harach, t o the replacem ent of thi s P roduc t or part s t hereof that ar e defec t ive in t i t l e.
The w arrant y set fo rt h i n Paragraph 1 does not appl y to part s t hat t he Operating Ins truc tions designate as
ha ving a l i m i t ed shelf-li fe or as bei ng expended i n normal us e (e.g. , filters ).
THE F ORE GOI NG WARRANTIES ARE EXCLUSIV E AND ARE GIVEN AND ACCE PTED IN LIE U O F (I)
ANY A ND ALL OTHE R WARRANT IE S, EXP RES S O R IMPLIED, I NCL UDING WITHOUT LIMITAT IO N
THE IM PLIED WA RRANT IES O F M ERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE: AND (II) ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACT OR
TORT, WHET HER OR NOT ARIS ING FROM BACHARACH’S NE GLI GENCE, ACTUAL OR IMP LIED.
The r em edi es of the Buyer s hal l be l i m ited t o thos e provi ded herei n t o the ex cl us i on of any and all other
remedies incl udi ng, wi th out limita tion i nci dent al or cons equen tial dam ages. No agreem ent varyi ng or
extending the for egoi ng warrant i es, rem edi es or t hi s li m i tat i on wil l be binding upon B acharach, Inc . unles s
in writ i ng, s i gned by a duly authorized of ficer of Bacharac h.

R egi st er y ou r w a rra nt y by vi si tin g

Produc t i m provements and enhancements are c ontinuous; t heref ore the s peci ficat i ons an d i nf ormat i on
contained i n this document m ay change wi thout notice.

Bachar ach, Inc . s hal l not be li abl e for errors cont ai ned herein or for incidental or cons equential damages
in c onnect i on wi t h the fu rni shing, perf ormance, or us e of t hi s material .

Copyright © 2000–2013, B acharac h, I nc. , All Ri ght s Res erved

No part of thi s doc um ent m ay be phot ocopied, reproduc ed, or t ranslated t o another language without t he

®

BACHARACH

is a regist ered trademark of Bacharac h, Inc . All other t rademarks, trade names,

service mark s and l ogos ref erenc ed her ei n bel ong t o their respec tive owners.

www.MyBacharach.com

Patent 6,590,690

prior wri tt en c onsent of Bac harac h, Inc .

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Multi-Z one Gas Monitor s

Ta ble of Con te nts

SECT ION 1. INTRODUCT ION............................................................................................................1

1.1. A bout This M anual .....................................................................................................................1

1.2. Warni ngs and Caut ions ..............................................................................................................1

1.3. S afet y P recaut i ons.....................................................................................................................1

1.3.1. Hazardous Areas ...........................................................................................................1

1.3.2. Com bust i bl e and F l ammable Gas es................................................................................2

1.3.3. AC P ower S uppl y ..........................................................................................................2

1.3.4. Prot ect ive Groundi ng .....................................................................................................2

1.3.5. Explosive Atm osphere ...................................................................................................2

1.3.6. Proper E xhaus t V ent i ng .................................................................................................2

1.3.7. Acc ess i ng the Interior o f the Monitor ...............................................................................2

1.3.8. Misus e and M odific ations t o the I nstrument .....................................................................3

1.3.9. In Cas e of Malfu nct i on ...................................................................................................3

1.3.10. Fusing...........................................................................................................................3

1.3.11. Ins tall ation Cat egory ......................................................................................................3

1.3.12. A l titude Li m it..................................................................................................................3

1.3.13. Cleaning .......................................................................................................................3

1.4. K ey E xt ernal Hardware Components ..........................................................................................4

1.5. F unct i onal Overview ..................................................................................................................4

1.5.1. Gen eral Desc ripti on .......................................................................................................4

1.5.2. Communi cat i ons Opt ions ...............................................................................................5

1.5.3. Underst andi ng M oni toring Le vels ....................................................................................5

1.5.4. Response t o t he Pres ence of Mul t i ple Re frigerants (HGM Onl y) .......................................5

1.5.5. Suggest ed Locat ion o f S am pl ing Poi nt s ..........................................................................5

1.5.6. Locating a Remote Di splay (Opt i onal) .............................................................................6

1.6. Specifications ............................................................................................................................7

SECTION 2. INSTALLA TION .............................................................................................................9

2.1. Ins tall ation Considerations..........................................................................................................9

2.1.1. W arnings and Caut ions ..................................................................................................9

2.1.2. Inspection .....................................................................................................................9

2.1.3. Location of t he M oni tor...................................................................................................9

2.1.4. Mount i ng I nstruc t i ons .....................................................................................................9

2.2. Connect i ng Gas S am ple Lines..................................................................................................10

2.2.1. Overview.....................................................................................................................10

2.2.2. Tubing Considerations .................................................................................................11

2.2.3. Connecting Purge Line.................................................................................................11

2.2.4. Connect i ng Ex haust Li ne..............................................................................................11

2.2.5. Connec ti ng S am ple Intak e Lines ...................................................................................11

2.2.6. Inst al l ing an O ptional Spli tt er K i t ...................................................................................12

2.2.7. Connect i ng the Wat er Tr ap...........................................................................................12

2.3. Int erior Com ponents ................................................................................................................13

2.4. E lectrical W iring.......................................................................................................................13

2.5. Con nec ting Comm uni cat io ns De vi ces .......................................................................................15

2.5.1. Rem ote Display M odule (R D) Co nnect i on .....................................................................15

2.5.2. Inte grating wi th B uilding M anagement S yst em s .............................................................15

2.5.3. Lar ger Integrated S ys tems ...........................................................................................15

2.5.4. Changing Term i nat or Switc h S ett i ngs............................................................................16

2.5.5. Pers onal Com puter ......................................................................................................16

2.6. T erm inati ng Mult i pl e M onitors ...................................................................................................17

2.7. Connect i ng t o a Building M anagem ent S ys tem ..........................................................................17

2.8. PC S o ftware ............................................................................................................................18

2.8.1. Operation ....................................................................................................................18

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2.8.2. Saving and Sending Programs .....................................................................................20

2.8.3. Tren d Data ..................................................................................................................20

2.8.4. Convert i ng the TRE ND Text F i l e to a Mi cros oft E xcel F i l e ..............................................20

2.8.5. Saving and Print i ng Sc reens and Logs ..........................................................................20

2.8.6. USB Type Laptops.......................................................................................................20

2.9. Optional Cu rrent Loop Interfac es ..............................................................................................21

2.9.1. Opti onal 4–20 mA DC Out puts ......................................................................................21

2.9.2. 4-20 mA DC Connect i ons .............................................................................................22

2.10. Connecting E xt ernal Alarm s .....................................................................................................23

2.10.1. Overview.....................................................................................................................23

2.10.2. Connection ..................................................................................................................23

SEC TION 3. SETUP PROGRAMMING .............................................................................................25

3.1. Initial Power Up .......................................................................................................................25

3.2. Dat a Di splay S creen ................................................................................................................25

3.3. Navigating to t he 1st Set up S creen ...........................................................................................25

3.4. Navigating to t he 2nd Set up S creen ..........................................................................................25

3.4.1. Location ......................................................................................................................26

3.4.2. Num ber of Zones Inst alled ............................................................................................26

3.4.3. Al arm Ac knowledge M ode ............................................................................................26

3.4.4. Audi ble Al arm ..............................................................................................................26

3.4.5. Zone Hol d ...................................................................................................................27

3.4.6. Detec tion Limi t.............................................................................................................27

3.4.8. Loo p M ode ..................................................................................................................27

3.4.7. Loo p2 F ac tor ...............................................................................................................27

3.4.9. Re-Z ero M ode .............................................................................................................28

3.5. Navigating to t he 3rd S etup S creen...........................................................................................28

3.5.1. Overview.....................................................................................................................28

3.5.2. Baud Rat e ...................................................................................................................28

3.5.3. Node Addres s .............................................................................................................28

3.5.4. Password ....................................................................................................................28

3.6. Additional Ser vi c e F eatures ......................................................................................................29

3.6.1. Ser vic e Tim eout ...........................................................................................................29

3.6.2. DET Digipot.................................................................................................................29

3.6.3. Node Addres s .............................................................................................................30

3.6.4. Sensor T em perature Coef fic i ent (For Factory Use Only).................................................30

3.6.5. Password ....................................................................................................................30

3.6.6. Acquiri ng T em perat ure Coeffic i ent (For Fact ory Us e Onl y) .............................................30

3.6.7. IR Digipot ....................................................................................................................30

3.7. E stabli shing the CO

S ensor Basel i ne.......................................................................................30

2

SECTION 4. GENERAL OPERATION ..............................................................................................31

4.1. F unct i onal Overview ................................................................................................................31

4.2. T he Zo ne S etup S creen ...........................................................................................................31

4.2.1. Location ......................................................................................................................31

4.2.2. Gas/ Re fri ge rant Typ e ...................................................................................................31

4.2.3. Distance......................................................................................................................32

4.2.4. Zone Tem perat ure .......................................................................................................32

4.2.5. Current Detection Reading ...........................................................................................32

4.2.6. Log Inte rval .................................................................................................................32

4.3. Navigating to t he 2nd Zo ne S etup S creen .................................................................................32

4.3.1. Leak Level ..................................................................................................................33

4.3.2. Spi ll Level ...................................................................................................................33

4.3.3. Evacuation L evel .........................................................................................................33

4.3.4. Re-Set ting the P eak P P M Value ...................................................................................33

4.4. Alarms ....................................................................................................................................33

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4.4.1. Func t i onal Overview ....................................................................................................33

4.4.2. Resp onding to Alarm s ..................................................................................................34

4.4.3. Al arm Detail Sc reen .....................................................................................................34

4.4.4. Ack nowledging A l arms .................................................................................................35

4.4.5. Si lenci ng an A l arm .......................................................................................................35

4.4.6. Clea ri ng the A l arm Event Log .......................................................................................36

4.5. S yst em F aul t s .........................................................................................................................36

4.5.1. Func t i onal Overview ....................................................................................................36

4.5.2. Navi gat i ng to t he F aul t Sc reen ......................................................................................37

4.5.3. Critical F aul ts ..............................................................................................................37

4.5.4. Non Cri t i cal F aul ts .......................................................................................................38

4.5.5. Reset to Fact ory Def aul t Set tings..................................................................................38

4.5.6. Clea ri ng Sy st em F aul t s ................................................................................................38

4.5.7. Vi ewing F aul t Log ........................................................................................................39

4.5.8. Vi ewing F l ow Log ........................................................................................................39

4.6. T he Trend Scree n....................................................................................................................40

4.6.1. Navi gat i ng to t he Tr end S creen ....................................................................................40

4.7. T he Cali bration Sc reen.............................................................................................................40

4.7.1. Overview.....................................................................................................................40

4.7.2. Navi gat i ng to t he Cal i brat i on Sc reen .............................................................................41

4.7.3. Calibrat i on Proc edure (HGM and A G M Onl y).................................................................41

4.7.4. Adj us ting Cal i bration Factor (HGM and AGM Onl y) ........................................................41

4.7.4. CO

A t m ospheri c Concentrati on ...................................................................................42

2

4.7.6. Programm ing N ew Gases (H GM Only)..........................................................................42

4.8. Zo ne Hol d M ode........................................................................................................................43

4.9. T he Diagnostic S creen .............................................................................................................44

4.9.1. Navi gat i ng to t he Diag nost i c S creen..............................................................................44

4.9.2. Diag nost i c S creen Overview.........................................................................................45

SECT ION 5. M AI NTEN ANCE...........................................................................................................47

5.1. Replacem ent P art s Overview ...................................................................................................47

5.2. Replacem ent P art s and Optional A c cessories............................................................................48

5.3. Troubleshooting.......................................................................................................................50

APPE NDIX A. RECO M ME NDED REFRIGERANT GAS ALARM SETT INGS .....................................53

APPE NDIX B. RS-485 CO MM UNICAT IONS P RO TOCO L ................................................................55

B.1. Overview.................................................................................................................................55

B.2. MODBUS RT U Protocol ...........................................................................................................55

B.3. MZ MO DBUS RTU O perat ion ...................................................................................................55

B.3.1. Overview.....................................................................................................................55

B.3.2. Protocol Details ...........................................................................................................55

B.3.3. MZ Mo ni t or Poll ing .......................................................................................................56

B.3.4. Netw ork Topol ogi es .....................................................................................................56

B.3.5. Key Com m P rotocol P aram eters ...................................................................................56

B.3.6. Sum m ary of Regist ers..................................................................................................57

B.3.7. Sy st em Data Re gi st er 0x0010 (16 Dec ) (R/ W, 54 B yt es) ................................................58

B.3.8. St atus Regi st er 0x 001 (17 Dec) (R/ W, 10 By tes )............................................................58

B.3.9. Fault Code T abl e .........................................................................................................59

B.3.10. Zone Dat a Regist er 0x12xx (R/ W, 78 B yt es) ..................................................................59

B.3.11. Alarms and A l arm Ac knowledge ...................................................................................60

B.3.12. Date Time Regi st er 0x0015 (21 Dec ) (R/ W, 14 By tes ) ....................................................60

B.3.13. Sensor Dat a Regist er 0x0016h (22 Dec ) (R, 82 By tes ) ...................................................61

B.3.14. Releas e Zo ne Hol d Regist er 0x0017h (23 Dec) (W , 10 B yt es) ........................................61

B.3.15. Hold Zone Regi st er 0x0018h (23 D ec) (W, 10 By tes ) .....................................................61

B.3.16. MZ Hol d Mode .............................................................................................................61

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B.3.17. Fault Log Regist er 0x1900-01 (6400-6 401 Dec) (R, 302 B yt es) ......................................62

B.3.18. Flow Log Regi st er 0x001F (31 Dec) (R, 142 By tes )........................................................62

B.3.19. Al arm Log Regi s ter 0x 1A00-02 (66 56-58 Dec ) (R, 582 By tes ).........................................62

B.3.20. Service Mod e Regi st er 0x 001B (27 Dec ) (W, 10 By tes ) ..................................................63

B.3.21. Releas e Servic e M ode 0x001C (28 Dec ) (W, 10 By tes ) ..................................................63

B.3.22. MZ Service Mode ........................................................................................................63

B.3.23. PPM Regist er 0x001E (30 Dec) ( R, 32 B yt es)................................................................63

B.3.24. Zone Log Regist ers 0x 3xyy (R, 1502 By tes ) ..................................................................63

B.3.25. MODBUS E xcept i on Res ponses ...................................................................................64

B.3.26. MODBUS Gas E numer ation .........................................................................................64

APPENDIX C. SYSTEM MENU M AP ...............................................................................................65

APPENDIX D. AGENCY APPROVALS............................................................................................67

APPENDIX E. SERVICE CENTERS ................................................................................................71

INDEX .............................................................................................................................................73

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Multi-Z one Gas Monitor s

SECTION 1. INTRODUCTION

1.1. A bout This Ma n ual

Thank you for invest i ng i n a Bacharach Multi-Zone Gas Moni tor. To assure operator safety and the proper
use of t he monitor please read thi s m anual. It provides import ant i nformat i on on the inst al l ation, operati on,
maintenance, and servicing of the m onitor and dis pl ay modul e.

If y ou have a working knowledge of your gas m oni t or, y ou wi l l find t hi s manual useful as a reference t ool . If
you are new t o the us e of gas monitors, t his docum ent is educat i onal i n the principl es of gas det ect i on and
the proper operat i on of t his device.

1.2. W arni ng an d Caut i on Conventions

W hen used in this manual or as labeled on the gas monitor, the followi ng hazard s ym bols and/ or
assoc i ated words are defined as foll ows.

W ARNING: This sy m bol and/or t he us e of the wo rd WARNING i ndi cates a potent i al
hazard ass oci at ed wi t h the use of thi s equipm ent. It call s at tent i on t o a procedure,
pract i ce, condi t i on, or t he l i ke, which if not c orrec tl y performed or adhere d t o, c oul d result
in deat h or s erious i nj ury .

W ARNING: This sy m bol and/or t he us e of the wo rd WARNING i ndi cates a potent i al
hazard from electri cal sho ck. It call s at tent i on t o a procedure, pract i ce, condi t i on, or t he
like, whi c h i f not correc tly perfo rm ed or adhered to, could result in death or s erious i nj ury .

CA UT ION: This s ym bol and/or t he use of the word CAUTION i ndi cat es a pot ential hazard
assoc i ated with t he use of thi s equipment . It call s at tent i on to a proc edure, prac tice,
condi tion, or t he l i k e, which if not c orrec tly perfor m ed or adhered to, could result i n m inor o r
moderat e i njury.

IMPORTANT: T he us e of the word IMPORTANT i n this m anual c al l s at tent i on to a
procedure, pr act i ce, condi t i on, or t he l i ke, which i f n ot c orrect l y perf ormed o r adhered t o,
coul d result in i ncorrec t perfo rm ance of or d am age to the equi pm ent and may voi d t he
warranty.

1.3. Safety Precautions

WARNING: This i ns trument has not been designed to be intrinsi call y s afe for use in areas

cl ass i fied as haz ard ous l ocat i ons. F or your s afet y, DO N OT
locations.

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WARNING: Thi s is NOT a saf ety device. S om e gases which t hi s inst rument can detect
may be com bus ti ble/flam m able. When pr operly configured, this inst rum ent is designed to
alarm at c oncent rations t hat are lower t han the ex plos ive l i m i t of t he gas. A s suc h, it is t he
buyer’ s res ponsibi l i ty to ini tiate an imm ediate pl anned response t o any gas leaks as soon
as they are detec ted. Thi s equipment should NEV E R be used t o m easure or s am ple
gases at or above t heir respect ive l ower explosive limi ts .

IMP O RTANT: T he gas m onitor us es a universal power s uppl y that is c apable of accept i ng
input s of 100 t o 240 VA C, 50/60 Hz. The moni t or’s power c onsum pt i on i s 20 Wat ts. It i s
highly recomm ended that the moni tor be c onnect ed direc t l y t o the A C power source,
pre fe rabl y on its own circuit with UPS or surge prot ect i on.

us e i t in hazardous (cl as si fied)

Multi-Z one Gas Monitor s

WARNING: A s wi t ch or circuit break er mus t be incl uded i n t he buildi ng i nst al lati on. The
switch must be i n c l ose prox i m i ty to t he m oni tor and wit hi n easy reac h of t he operat or. The
swi t ch m ust be clearl y marked as the disconnec ting de vice fo r the equipment .

W ARNING: Un der no circumst ances s houl d the moni tor be operat ed wi t hout connec tion
to a prot ect ive gr ound. Doing s o pos es a potent i al s hock haz ard and is al s o a violat i on of
elec trical saf ety s t andards appl i c able t o t hi s t ype of e qui pm ent.

W ARNING: Do n ot operate t hi s equi pment i n the pres ence of flamm able liquids , vap ors,
or ae ros ol s. Operati on of any el ect rical i nst rum ent i n suc h an en vironment const i t utes a
safety hazard.

W ARNING: It is imperative that the ex haust port on thi s inst rum ent be pr operly vent ed as
described i n this m anual . F ai l ure t o do so m ay c onst i tut e a saf ety hazard.

W ARNING: Ext rem e care s houl d be exerc i sed when ac cess i ng the interior o f the m oni tor.
Only qual ifie d el ect ri cal m aint enance personnel should mak e connect i ons an d perf orm
adjus tments . A l way s rem ove A C powe r befo re openi ng t he m oni tor’s enclosure.

W ARNING: The prot ect i on provided by t he m oni tor may be i m pai red i f the monitor is us ed
in a manner not s peci fied by B ac harach, Inc. M odi fic ati ons to t hi s m onitor, not ex press l y
app roved, wil l void t he warrant y.

W ARNING: Do n ot cont i nue to use t hi s equi pment i f ther e are any symptoms of
malfunc tion or fail ure. In the cas e of s uch occ urrence, de-energize t he power suppl y and
cont act a qual ifie d repai r techni c i an or the neares t B acharac h Servic e Center.

WARNING: Thi s device us es t ype “F” fus es (F1 and F2) r ated at 1. 0 A, 250 VA C.
Repl ace ONLY wi t h Bachar ach-approve d fus es.

WARNING: Elect ri cal inst al l ation shoul d be perf ormed by a cert ifie d el ect ri c i an, and m ust
com pl y with all appl i cable NE C/CEC and l ocal elec trical saf ety codes.

IMPORTANT: Us e ONLY t he provided knock outs f or electrical and com munic ations
wiring. Drilling into the b ox will voi d the warra nty .

IMPORTANT: T his device i s cl ass i fied as Install ation Category II, Poll ution Degree I I, as
de fined by UL.

IMPORTANT: T his device i s desi gned for o peration at or below a n alti t ude of 6, 562 ft
(2,000 m ). Do not operate t hi s device above t hi s al titude li m i t.

NOTE: To cl ean the outside of t he cas e us e a dry c l oth. To avoid shock hazard and/or
equipment dam age, DO NOT use soap and wat er.

2 P/N: 3015-5074 Rev 11

1.4. Key External Hardware Components

Multi-Z one Gas Monitor s

Figure 1-1. Multi-Zone Monitor Fron t View

NOTE: Mount i ng cut outs are loc ated on t he back of the m oni tor, and are visible from

ins i de t he Multi-Zone m oni tor. A m ounti ng t em pl ate is al so s hi pped wi t h the m oni t or. For
mount i ng i nformation, refer to t he mount i ng i nst ruc tions on page 8.

Stand ar d Acce sso r i es for a 4-P o int System

QTY Description Pa rt Number

5 Line-End F i lters 3015-3420
1 Charcoal F i l ter (Hal ogen Gas M oni t or Only) 3015-3125
3 End-of-line Wat er-Stop Fi l ter Assembly 3015-5512
1 T-Bolt Brac ket (Hal ogen Gas M oni t or Onl y) 3015-2969
1 Multi-Zone Ins truc tion M anual 3015-5074

1.5. Functional Ov erview

1.5.1. General Description

Gas moni tors are s peci fied t o support com pli ance t o federal, s tat e and l ocal safety codes governing
emissions. A voiding si gni ficant l oss reduces equi pm ent replacem ent costs, mai ntains equipm ent effici ency,
promot es safet y , and prot ect s t he environm ent.

The Bacharach Multi-Zone Moni t or provides cont i nuous moni toring of gas l evels in up to 16 s eparate t est
zones. The ins t rum ent is easi l y programm ed t o m oni tor a vari ety of gases (dependent on part i cular m odel )
and independent l eak (small), spill (medium), and evac uat i on (large) levels m ay be des i gnated for e ac h
zone. The ins trument also retains a l og of previous readings t hat c an be easi ly acc ess ed for analys i s.

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Multi-Z one Gas Monitor s

An audi ble al arm and front panel indicators are pro vided t o si gnal al arm and fault conditions, and relay
contacts are provide d t hat c an be used t o trigger ext ernal al arm devices in t he event of a s y st em fault , o r if a
leak (small), spill (medi um ), or evacuati on (large) level of gas is det ect ed. The syst em also m ay be fit t ed
with and optional two-channel 4-20 mA current l oop board for c onnect i on t o rem ote moni toring equi pm ent.

The multi-z one m oni tor requi res only m inor peri odi c mai ntenanc e s uch as the oc cas i onal repl acement of
filters. The monitor incorporates act i ve diagnost i cs that cont i nuously check the s ys t em for proper op eration.
A front panel indicator i s provided to alert an operat or o f sy st em m al func tions, and fault codes are gener at ed
that enabl e the us er to identify the cause of the fault.

1.5.2. Communications Options

The multi-z one m oni tor feat ures full two-way c om m uni cat i ons via an RS-485 interface. MODBUS RTU is
the communications protocol standard. The instrument c an be c onnect ed di rect l y to a Buil di ng
Management S ys tem or it may be operat ed as a s tand-alone s yst em .

An RS-232C port is also provided for connect i on to a P C. This enables the monitor t o be setup from a
personal computer. Refer t o Appendix B for m ore i nformation on communications protocols.

1.5.3. Understanding Moni toring Le ve l s

Effect ive use of thi s inst rum ent requires an unders tanding of wh at c onst itutes reasonabl e alarm set poi nts
for the types of gas bei ng monitored. Manufac turers define al l owable exposure l evels and thres hol d l im i t
values i n uni ts of part s per m i l l i on (ppm ). In a good “ti ght” inst al l ation these back ground l evels wil l be
accept abl y low and oft en do not requi re correc t i ve ac tion. Y ou can reduc e nui sanc e al arm s and needles s
service cal l s if t he al arm l evels are set at pract i cal limits. Bacharac h has developed recomm ended
monitoring re frigerant gas levels based on c om pl iance to ANSI/BSR ASHRAE 15-2007 and ASHRAE
Safety Code 34-2007. Thes e ref erence levels are li st ed i n Appendix A.

Set ting the monitor at thes e recomm ended al arm levels will satis fy the needs of most users. However, the
ppm l evels generat ed by system l eaks i nt o the environment are great l y influenced by the volume o f air in the
sam pl i ng area, ai r circulation, size of the l eak, di st ance t o the moni t ori ng poi nt, and a host of other variabl es.
In some cas es the s et poi nts may need t o be adj ust ed ei t her up or down t o achieve effect i ve moni toring.

1.5.4. Response to the Presence of Multiple Refrigera nts (H GM On l y)

The H GM-MZ is a refrigerant l evel m oni t or, not a gas analyzer. Y ou mus t program the moni tor t o tes t for a
specific refrigerant , and it wil l onl y return accurat e conc entrat i on readi ngs fo r t hat part i cular refrigerant . I f
a leak occurs of another refrigerant gas ty pe, t he m oni tor may ret urn i ncorrec t readi ngs.

Mos t appli cat i ons onl y requi re detec tion of a s i ngle re frigerant and the probl em s t hat are assoc i ated wit h
monitoring multipl e gases are rarel y an issue. I f t here i s a pos sibi l i ty of mul tipl e refrigerants l eaking i n the
sam e sam pli ng zone, t hen you s houl d caref ul l y c onsi der which refrigerant com pound you program the
unit to moni tor.

1.5.5. Suggested Location of Sampl i ng Poi nts

At the point of a leak the gas is nearly pure. As the gas is dispers ed i nt o the air, the gas m ol ecul es diffuse,
causing a di l ution of t he ori gi nal concent rat i on. The monitor measures the concent rat i on at the sam pl e
col l ect i on poi nt . There fore, i f t he t erm i nation of t he coll ect i on l i ne i s not at the exact poi nt of t he leak, the
unit wil l read a di l ut ed m i xt ure of t he gas and air.

Gases of int eres t m ay be heavier or li ghter t han ai r and may collect above or below t he poi nt of t he leak.
Therefore s am pl i ng point pl ac em ent is critical and must take into ac count propert i es of the target gas and air
flow withi n t he space. In general, s am pl i ng poi nts shoul d be locat ed as close as pos sibl e to t he sourc es of
potential leaks. If thi s is im pract ical , t hen al arm set points for that zone shoul d be adj ust ed to c om pensat e
for the di l ut i on of t he gas. General pl acement gui del i nes are shown below, but ai r-flo w dynami cs s houl d al so
be considered (e.g. , consider t he effects of ex haust fans whi ch t end t o draw t arget gas from the s pace).

• HGM-MZ Halogen Mount sampl i ng poi nts 6-18 inches above fl oor

• AGM-MZ NH

• CO

-MZ CO2 (Ca rbon Di ox i de) Mount sampl i ng poi nts 4-6 feet above floor (bre athing zone)

2

(Ammonia) Mount sampl i ng poi nts 1-2 feet bel ow c ei l i ng

3

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Multi-Z one Gas Monitor s

DO NOT block any of the zone s. Unused z ones may be di sabled by set t i ng the dist ance parameter to
zero feet i n the z one set up screen.

The MZ monitor should be centrall y locat ed i n the mechani c al room and be readily acc essibl e for easy
visual m oni t oring and s ervicing. Th e c om bi ned l ength of sam pl e tubing plus ex haust tubi ng shoul d not
exceed 1200 ft (366 m) f or any zone. The fres h ai r purge l i ne shoul d draw f rom an area t hat does not
contain any gas. The exhaus t li ne s houl d run t o an outs i de l ocat i on if possi ble.

NOTE: The c om bined lengt h of th e purge line an d the ex haust li ne c annot exceed
500 feet.

Ideally , t wo t o t hree pi ck up point s spaced around eac h chi l l er wil l provide suffici ent coverage. It m ay be
necess ary t o perform a smoke test of the m echanical room to determi ne the bes t locat i ons. The sm oke t est
provides the pat tern of air c urrent s pres ent i n the mechani cal room .

The MZ monitor s houl d be kept dry . When used in a wet or hum i d area, i t is highl y rec om m ended to us e
the opt i onal wat er st op accessory to avoid internal dam age.

1.5.6. Locating a Rem ote Display (Optiona l )

The Remot e Di splay (RD) Module s houl d be m ounted out si de of the m echani c al room , or just i nside the
room’s doorw ay i f the first option isn’ t poss ibl e. This i s t he “s pl i t arc hi t ect ure design” for s af ety of t he
operator. The RD can be l ocat ed up to 4500 f eet (1372 m ) from the MZ monitor. The RD is the man
mac hi ne i nterface by which y ou program t he MZ, ac knowledge alarms and obs erve c ondi t i ons i ns i de of t he
mec hani cal room . Not e t hat there are two additional al arm relay cont act s in the RD that c an be
program m ed to alarm on l eak, spill, evacuate, fault, or m oni t or on conditi ons .

Figure 1-2. HGM-M Z (Halogen) and RD Placement in a Mechanical Room

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Multi-Z one Gas Monitor s

a nd multip le area monitoring system for low level continuous

tion systems. System design supports compliance to the r efrigerant monitori ng

NOTE: The pick up poi nts l ocat ed on t he fl oor in the above illus trati on are exam pl es for
refrigerants which are heavie r t han ai r. Placem ent of pick up poi nts should be determi ned
based on charac terist i cs of the gas bei ng m oni tored and ambi ent condi tions of the sam pli ng
area. (A i r= 28.9 g/ m ol e, CO

=44. 0 g/m ol e, NH3=17. 0 g/m ol e, and hal ogens = 100+ g/ m ol e. )

2

1.6. Specifications

HGM-MZ Specifica tions

Multiple ref r igerant gases

Product Type

Sensitivity All gases 1 ppm
Measuring Range All gases 0 to 10,000 ppm

Accuracy1

Gas Lib rary

monit or ing of CF C, HCFC and HF C r efri ger ant gases u sed in mo st commercial
refrigera
require ments of A NS I/BS R A S HRAE 15-2007 and ASHRA E S afety Code 34-2007.

±1 pp m ±1 0% of read ing fro m 0-1000 ppm
(R11, R22, and R113 ±10 ppm ±15% of r eading 0-1 000 ppm)

CFC: HFP, R-11, R-12, R-113, R-114, R-502
HFC: R125, R-134a, R236FA, R245Fa, R32, R-404a (HP62), R-407a, R-407c

(AC9000), R-410a (AZ20), R422a, R422d, R427a, R-507 (AZ50), R-508b
(SUVA95)

HCFC: R-123, R-124, R21, R-22, R227, R-23, R-401a ( MP39), R-402a (HP80) ,

R-402b ( HP 81) , R-408a, R-409a, R-500, R-503

Halon: H121 1, H1301, H2402
Other: FA188, FC72, H1234YF, N1230, R424A , R426A , R438A, CUSTOM

AGM-MZ Specifica tions

Product Type

Sensitivity 20 pp m
Measuring R ange 25 to 10,000 ppm
Accuracy1 ±10 ppm ± 10% of rea ding from 0-10,00 0 ppm
Gas Lib rary Ammonia (NH3)/R-717

The AGM-MZ provides multiple area monitori ng system for low level continuou s
monit or ing of Ammonia gases used in most comm ercial systems.

CO2-MZ Specifica tions

The CO2-MZ prov ides mult iple area monitori ng for low l evel continuous mon itoring of

Product Type

Sensitivity 10 pp m
Measuring Range 300-8,000 ppm
Accuracy
Gas Lib rary Carbon Diox ide (CO2)/R-744

1

carbon dioxide gases used in mo st c ommercial systems. System desig n s upport s
compliance t o t he gas monitorin g r equirements of ANS/BS R ASHRE 15-1994.

±5 PPM ±5% of reading fr om 300-1000 ppm, ±10% of r eading from 1001-3000 ppm

1

At reference environmental conditions (25°C, 45% RH non-condensing, 1 ATM )

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Multi-Z one Gas Monitor s

General Multi-Zone S pecifications

Coverage 4 point stand ar d, expandable to 16 po ints in 4 point increments
Detector Type Infrared Non-Dispersive

3 Indic ator lights:

• G r een Monitor is po wered on. LED glows during nor m al operat ion; flashes wh en

F ront Panel

• Red A larm. LED flashes when any point has exceed ed the alarm setting.

• Yellow Fault. LED flas hes when t her e is a sy stem fault

Size (H x W x D) 12.23" x 13.7" x 4.96" (31.06 cm x 34. 80 c m x 12.60 cm)
Weight 15 lb s. (6.8 kg)
Sampling Mode Automatic or manual (hold)
Re-Zero Auto or on z one c hange

Response Time 5 to 315 s ec ond s – depe nding on air line length and number of zones
System N oise Le s s than 40 dB(A ) @ 10 feet ( 3m)

Monitor ing Dis ta nc e 1,200 ft (366 m) maximu m for c ombined length of s ample + exhaust tubing (eac h zone)
Conditioned Signal Dual optional 4-20 mA DC isol ated outputs. Channel 1 = zone area, Channel 2 = PPM

Alarms

Communications
Power Safety Mode Fully automatic sy stem reset. A ll pr ogr am m ed parameters retained.

Operating Temp 32 to 122 °F ( 0 t o 50 ° C)
Ambie nt Humidit y 5% to 90% RH ( non-condensing)
AC Power 100 to 240 VAC, 50/60 Hz, 20 W
Certification UL 610 10-1, CA N/CSA 22.2 No. 61010-1 & CE Mark
Warranty 2 years from dat e of shipment
Altitude Limit 6,562 ft (2,000 m)
Sensor Life 7-10 y ear s

Four S P DT alarm contacts rated 2A at 250 VAC (inductiv e) 5 A at 250 VAC (resistive).
Thr ee ar e assigned to PP M level alar m s, one a s sig ned to sy stem faults.

Full two-way c om m unication s w ith Remote Display Module or Building Management
System v ia RS -485 serial interfac e. RS-232 C c ommunic ations port sta ndard.

unit is in warm-up mod e

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Multi-Z one Gas Monitor s

SECTION 2. INSTALLATION

2.1. I nstal l at ion C on si d erat io ns

2.1.1. W arnings and Caution s

WARNING: Ex pl osi on hazard! Do not m ount t he MZ m onitor in an are a t hat may cont ai n

flammable li qui ds, vapors , or aeros ol s. Operation of any el ect ri cal equipment in such an
en vironm ent c onst i tut es a s afet y hazard.

WARNING: Shoc k hazard! Al way s di s connect A C power b efore w orking ins i de
the monitor.

CAUTION: Drill i ng holes in t he MZ enclosure m ay dam age the uni t and wil l void the
warranty. Please use t he knoc kout s pro vided for elec tric al conn ect ions.

CAUTION: The MZ moni tor c ontains sens i tive elect roni c c om pone nt s that c an be easi l y
damaged. Do not touch nor dist urb any of these c om pone nt s.

2.1.2. Inspection

The MZ monitor has been thoroughly inspect ed and t est ed pri or to shipment from t he fac t ory. Nevertheless,
it is recomm ended that the moni tor be re-check ed pri or t o i nst al l ation. Ins pect the out side of t he enclosure
to m ake s ure there are no ob vious signs of shi ppi ng damage. O pen t he enclosure and ins pect the interior of
the monitor for loose c om ponents t hat m ay have become disl odged during shi pm ent. If damage is
dis covered, pl ease c ontac t t he nearest B acharac h Service Center for ass i st ance.

2.1.3. Location of the Moni tor

The MZ monitor should be cent ral l y locat ed i n the faci l i ty and should be easi l y ac cessi bl e for vi sual
monitoring and servicing. Combi ned l ength of the i ntak e sam ple l i ne and t he exhaus t li ne cannot exceed
1200 feet (366 m) in l ength, but i t is important t o rem em ber t hat s am pl i ng cyc l e tim e is proporti onal t o the
tot al num ber and l ength of individu al sam pl e l i nes.

Dirt, greas e, and oi l s can adversely af fect t he operation of t he M Z monit or. T he m oni tor s houl d be i nst al led
out of direc t s unl i ght in a cl ean, dry area t hat is not s ubj ect to temperature or humidit y ext remes. Installation
of the moni t or i n a m echanical room is acc eptable provided reasonabl e environmental condi t i ons ex i st. If
there is a quest i on, consider i nst al l i ng the unit outside of the m echanical room in a cl eaner area of the
facility.

NOTE: The mounting loc ation o f t he m oni tor s houl d al l ow i t to be eas i l y ac cess i bl e for visual
monitoring and servicing.

2.1.4. Mounting Instructions

NOTE: The MZ moni t or should be ins tall ed plumb and level and sec urely f ast ened to a ri gid

mount i ng surface.

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Multi-Z one Gas Monitor s

The enc l osure util i zes key hol e m ounting brack ets des i gned for ¼ inch fasteners. Loc at e the four screws as
shown i n t he di agram below or by using the provided m ount i ng template (P /N 3015-5109). Allow t he sc rew
heads to protrude approximately ¼ inch.

Figure 2-1. MZ Moni tor Mounting Spe cifica tions

Hold the m oni tor flat agai ns t t he m ounting surface and al l ow i t to s l i de down, engagi ng t he sc rew heads in
the key hol e slots of t he m ounting brack ets. Adj ust the sc rews as necessary to hold the moni tor s ecurely
agains t t he m ount i ng surface.

2.2. Connecting Gas Sample Lines

2.2.1. Overview

Individual gas sample lines are run from t he MZ monitor t o each area of the fac i l i t y t o be m oni tored.
Addi t i onal l y, a purge l ine is inst al l ed to pro vide cl ean ai r for res ett i ng the infrared zero basel i ne. All air,
sam pl e, and purge l i ne connec tions are locat ed on the left side of t he enclosure. Refer to the il l ust rat i on
below.

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Figure 2-2. MZ Moni tor Side View

2.2.2. Tubing Con sidera tions

Use ¼” (6. 35 m m ) outside di am et er (0. 040” or 1.016 m m wall) flex tubi ng for all air li nes (P/N 3015-3235) o r
equivalent. The tubing s houl d be clean and free of resi dual m oi st ure or other cont am i nant s. The tubing
shoul d be cut cleanl y with a s harp knife and c are should be tak en not t o distort the tubi ng end.

To conn ect t he ai r l i nes to the moni t or sim pl y pus h the tubing firmly ont o t he connect or. To remo ve a li ne,
press t he pl ast ic ri ng on t he connec tor with one hand, t hen wi t hdraw the t ube with y our other hand. See
below.

The Multi Zone monit or uses push­to-connect (P T C) s ty l e connec tors .

To insert sampl e lines, firmly push
the ap pro pri ate tubi ng i nto t he hol e
in t he cent er of the connect or unt i l i t
seats i n the c onnect or. Refer to t he
fig ures at t he l eft .

To remove tubing from a PTC
connector, push and hold the
spring-loaded collar inwards, then
si m ul taneous l y withdraw the tubing.
Refer t o the figures at t he right.

Figure 2-3. Usi ng P TC Conne ctors: Connec ting (Left ) a nd Disconne cting ( Right)

Al l tubi ng bends should have a radius of no less than 5” (12. 7 cm) to ensure proper air flow. If kin ks o r
obstruc t i ons occ ur i n any of the ai r li nes t he i nst rum ent m ay not func tion properl y.

2.2.3. Connecting Purge Li ne

A purge li ne is an int ake li ne t hat i s required to draw fr es h ai r into the i nst rum ent and should not ex ceed
300 feet (91. 44 m m ) i n l ength. It i s advis abl e to t erm i nate t he purge li ne outdoors , provided t he i nput i s
not expos ed to rain, s now, ice, exhaus t fu m es, or other airborne cont am inates. If a n out doo r inst al l ation
is i m pract i c al , t he l i ne should be run to an area i ns i de the faci l i ty that you are c ertain i s not cont aminated
with am bient gas. If t hi s is not possibl e, an opt ional c harcoal filt er assembly (P /N 3015-3125) c an be used

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Multi-Z one Gas Monitor s

with the Halogen Gas M oni tor to filter refrigerant from the purge l ine. It may be m ounted adjacent to t he
monitor. A line-end filter (P/N 3015-3420) s houl d be att ached t o the end of the purge line when the
charcoal fil ter is not used. Note t hat t he charc oal fil ter opt i on m us t NOT be used in am monia or CO

2

applications.

IMPORTANT (CO
BE run outside, away from any known s ources of CO
concent ration value can be manuall y ent ered by t he user in the CA L s creen. See CO
At m ospheri c Concent ration (page 42).

Only): B ecaus e CO2 is pres ent in ambient air, t he purge l ine MUST

2

gas . A n at m ospheri c CO2

2

2

2.2.4. Connecting Exha ust Li ne

An exhaus t li ne can be used when i t is required to vent gas sampl es away from the inst rum ent and
shoul d not ex ceed 300 feet (91.44 mm ) i n l ength. The exhaust l i ne should termi nate i n a l oc ati on that is
com pl etely isol at ed from t he purge l i ne termination poi nt and ot her areas of the fac i l i t y that wil l be
monitored. I deal l y t hi s l ine shoul d terminate outdoors i n a l ocat i on that i s not expos ed to t he el ement s .
This li ne does not requi re a l i ne-end filter. If the exhaus t li ne termi nates outs i de the building, pos i tion the
tubing s o that no water o r m oi st ure c an ent er i t.

2.2.5. Connecting Sampl e Inta ke Line s

The MZ monitor i s des i gned to ac com m odat e up to 16 s eparate s am pl e i ntak e l i nes. The st andard
configuration of t he uni t i ncludes one m ani fold o f 4 intak e connec tors and 1 purge connector. Additional
manifolds can be easil y i nst all ed to increas e monitoring capac i ty (field inst al l ation kit P/N 3015-5171, and 4
zone l i ne end fil t er kit P/N 3015-3411).

Sam pl e intake li nes can be up t o 1, 200 feet (366 m ) when no ex haust tubi ng is used. Otherwi se, t he
com bi ned l ength of the sampl e l i ne and the exhaust l i ne cannot ex ceed 1,200 ft (366 m ). All line
terminations should be positioned to reduc e the pos si bi lity of mists , aeros ol s, oil, water, dus t, or other
contami nates bei ng drawn i nt o the inst rum ent. A line-end filter (P/N 3015-3420) should be att ached t o the
end of each sam pl e intak e l i ne. G eneral pl acem ent gui del i nes are s hown bel ow, but ai r -flow dynam i cs
shoul d al so be c onsi dered (e. g. , c onsi der t he effects of ex haust fans which t end to draw target gas from the
space).

• HGM-MZ Halogen Mount sam pl i ng poi nt s 6-18 inches above floor

• AGM-MZ N H

• CO

-MZ CO2 (Carbon Dioxide) Mount sam pl ing poi nts 4-6 feet above floor (breat hi ng zone)

2

(Ammonia) Mount sampl i ng poi nts 1-2 feet bel ow c ei l i ng

3

IMPORTANT: DO NOT bloc k any of t he zones. Unus ed zones m ay be di sabled by set t i ng
thei r length param eter to z ero in t he zone s etup s creen.

Dependi ng on ty pe of us e and l ocat i on of lines, t he end-of-line water s top filter assembly can be used to
prohibit m oi st ure from enteri ng the intak e l i nes. Three (3) end-of-line wat er st op filters are s uppl i ed wi t h a
standard unit. P l ace the end of the intak e l i ne int o the blue receiver of the end of li ne wat er st op and tighten
sufficiently.

NOTE: O nl y one fil t er as s embly, ei ther t he l i ne-end filt er or end-of-l ine water s top, should
be used for eac h l i ne.

Pl eas e refer t o t he earl i er section Suggest ed Location of S am pl ing Points (page 4) to l earn m ore about
where to place t he ends of the sam pl e i nt ake lines .

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Multi-Z one Gas Monitor s

2.2.6. Installing an Optional Splitter Kit

Splitter kits are m ade available which allow t he MZ unit to t ake gas sam pl e readi ngs from s everal sam pl e
point s whil e ut i l i zing j ust a si ngl e zone. These kits are designed for us e ONLY in confined/ defined spac es
with hi gh potent i al for leak s, such as food cas es, c ol d rooms, refriger at i on rack room s, etc . Bacharach’s
2-way (P/ N 3015-5404) and 3-way (P /N 3015 -5405) s plitter kits are avai l able as opt i onal acc essories. Refer
to i nst ructi on 3015-54 15 (s uppl i ed wi t h the k it) for detai l ed installation instruction.

2.2.7. Connecting the Water Trap

The water trap is an optional acces sory for applic ations that resul t in wat er or c ondensat i on frequently
entering the i nt ake l ines. This is avail abl e i n a manual st yl e trap (P/ N 0007-1655) which is m anuall y
empt i ed once it has becom e fill ed. Instal l the water trap close to the unit for the m ost effecti ve res ul t s. The
int ake li ne may be cut where t he user finds appropri ate (pre ferably cl ose t o m oni tor). Each side of the
int ake li ne should be i nsert ed into the recei vers on ei ther si de of the water t rap. S ecure t i ghtly. A
replac em ent fil ter (P /N 0007-1656) for the wat er t rap i s availabl e and i s replaced by unscrewing t he clear
plas tic c up of t he wat er t rap, pull i ng the filter directly out (do not uns crew), and i nsert i ng t he new fil t er i nto
plac e. Replace t he cup of the wat er t rap. If desired, an opti onal mount i ng brac ket (0007-1657) may be
used to s ecure t he wat er trap in pl ace.

NOTE: Th e t erm inat ion filt er (P/ N 3015-3420) or end-of-line water s top filt er (P /N 30 15-

5512) shoul d be used, regardles s of the presenc e of a water trap.

IMPORTANT: E xt rem e or hum i d temperatures m ay caus e wat er to c ondense in t he tubes .
A water t rap i s highl y rec om m ended for us e i n thes e scenarios.

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2.3. Interior Components

Multi-Z one Gas Monitor s

Figure 2-4. MZ Moni tor Interi or Compone nts

NOTE: Th e pl ast i c c abl e ties surroundi ng t he ai r pum p are t o ensure s afe handli ng duri ng

shipping. Please remo ve befo re operat i on. Reinst al l a plasti c cabl e around t he ai r pum p if
the uni t i s shipped to B acharac h, Inc. for s ervice o r repair. This prevents dam age during
shipping.

2.4. Electrical Wiring

The MZ monitor us es a universal power s uppl y that i s c apabl e of ac cept i ng i nputs of 100 t o 240 VAC,
50/60 Hz. The moni t or’ s power c onsumption i s 20 W atts. It is highly recomm ended that the moni tor be
connect ed di rect l y to the A C power source, prefer abl y on its own circuit. The AC power c onnect i on should
be com pl eted wit h UL l i st ed 3-conduc t or wi re (m i ni m um 16 AWG), rated 300 VA C at 105° C.

Locate a c onvenient s ervice knoc kout and inst al l elec trical conduit in the typical m anner.
Locate t he A C input terminals and ground stud on the insi de of the m oni tor. Sec ure t he i ncom i ng A C power

neutral (w hi te/ bl ue) and live (blac k /brown) wires to t he LINE 1 and LINE 2 terminals.
Usi ng t he suppl ied cri m p-on ring t erm i nal s, was hers, and nuts , connec t the incom i ng A C power ground wire

(green) to t he m oni t or’ s A C input ground stud, and t hen i nst al l a separate wire bet ween t he ground st ud and
the GND t erm i nal .

W ARNING: Electrical installation shoul d be perf ormed by a cert ified elec trician, and m ust
com pl y with all appl i cable NE C/CEC a nd l ocal electrical safet y codes.

P/ N: 3015-5074 Rev 1 1 13

Multi-Z one Gas Monitor s

W ARNING: Co pper conduc tors for c onnect i on t o suppl y mai ns m ust be m ade i n
accordanc e wi t h NEC/CEC and l ocal codes.

W ARNING: The A C power ground wire mus t firs t be connect ed to t he monit or’ s ground
stud. Under no c i rcum s tanc es should this m oni t or be operated without a protec tive ground.
Doin g so poses a potent i al shoc k haz ard, and i s al so a viol ation of elect ri cal safet y
standards appl i cable to t hi s t ype of equipment.

IMPORTANT: Dril l i ng holes in t he MZ enclosure may dam age t he uni t and wil l void the
warranty. Please use t he knoc kout s pr ovided for elect ri cal connec ti ons.

A swit ch or c i rcuit break er rated 1.0 A , 250 VA C must be at tac hed to the m oni t or’ s AC powe r leads. This
swi t ch m ust al s o be l ocat ed i n cl ose prox i m i t y t o the m onitor, and be i n easy re ach of the op erat or. This
swi t ch s houl d al so be clearl y marked as t he monit or’ s main A C disc onnect devic e. The c i rcuit break er or
switch mus t disc onnect al l current -c arrying conduct ors (i. e., live and neutral).

Figure 2-5. Multi-Zone AC Input Powe r and Ground Connections

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Multi-Z one Gas Monitor s

2.5. Co nn e cti ng Co mm unicati on s Device s

2.5.1. Remote Display Module (RD) Connection

The MZ is connec ted t o the optional RD usi ng a shi elded twist ed pai r i ns trum ent cable. The maxim um
dis tanc e between the farthest MZ and RD is 4500 feet.

Use any of the rem aini ng service knockouts to gain access t o the interior of t he m oni t or. The RS-485
communications wiring bet ween t he MZ and RD mus t be c onnect ed i n the followi ng m anner:

1. Locate t he RS -485 c onnect or in t he MZ (see Figure 2-3 on page 13).

2. Connect one lead of a t wist ed shi elded pai r to the “B ” connec tion poi nt. Not e the wire color.

3. Connect t he second wire to the “A ” c onnect i on poi nt. Note t he wire col or.

4. Connect t he ground to t he “

5. Locate t he RS -485 c onnect or mark ed “TO MONI TO RS” in t he RD (see this topic in the RD manual).
Thi s c onnect or i s locat ed on the bottom of t he RD PC board, sec ond from the right.

6. Run the wire to the RD and connect the t wist ed shi el ded pai r to t he RS -485 “TO MONI TORS”
connect or using the s am e col or code as us ed on the MZ.

2.5.2. Inte grating w i th Building Manage ment Systems

The MZ may be connec ted di rec tly t o a Buil di ng M anagem ent S y st em usi ng a s hi el ded twist ed pai r c abl e.
The c abl e from t he Buil di ng M anagem ent S ys tem is connect ed t o the RS-485 connector ins i de the MZ
monitor. M ODBUS RTU is the standard communications protocol.

Use any of the rem aini ng service knockouts to gain access t o the interior of t he m oni t or. Locate the RS-485
connector and remove it from t he ci rc ui t board. Secure t he wi re leads to t he connec tor orient i ng them as
shown i n t he di agram below. Chec k t o m ake sure that the polarit y matches t he wi ri ng t o the B ui ldi ng
Management S ys tem. W hen you are t hrough s ecuring the c onnections, carefully plug the c onnector bac k
onto t he ci rc ui t board.

2.5.3. Larger Integrated Systems

You m ay also connec t the MZ monitor to a Bui ldi ng M anagem ent S ystem through a Remot e Di splay. In thi s
case, first connect the MZ to t he RD as desc ri bed above. Then, foll ow t he i nst ruct i ons in the
Communi cat i ons Conn ect i ons section of the RD manual for informat i on on how t o connec t the RD t o a
Buil di ng M anagement Sy st em .

” connect i on point.

GND

P/ N: 3015-5074 Rev 1 1 15

Figure 2-6. RS -485 C o n n ector

Multi-Z one Gas Monitor s

2.5.4. Changi ng Termi na tor Switch Settings

The t ermi nator switch i s s hi pped from the factory i n t he “OUT” pos i tion (no term i nat i on). This i s the correct
setting if the MZ is to be inst al l ed i n the mi ddl e of a network. If the MZ moni t or is connected as a single
de vice or if it i s the l ast device on t he network chai n, t he termi nat or m ust be m oved to the “IN” posi tion.

Locate s wi t ch #4 and det erm i ne i t s pos i tion. If it must be moved, sl i de t he switc h to the appropri ate pos i tion.
(Note that s wi t ches 1-3 are for service use.)

Figure 2-7. Termi nation Switches

2.5.5. Personal Compute r

The MZ may be connec ted t o a personal com put er us i ng t he RS -232 interface on the left s i de of
the enclosure. Software wil l be provided upon request or as a download fr om t he B acharac h webs i te at

http://www.MyBacharach.com/downloads.htm.

NOTE: Refe r to t he “P C S oft ware” s ect i on (section 2.8 on page 18) for detail s .

16 P/N: 3015-5074 Rev 11

2.6. Terminating Multiple Monitors

Multi-Z one Gas Monitor s

Figure 2-8. Termination Setting s for a Network of M ultipl e Monitors and a Re m ote Display

NOTE: For mul tiple MZs wi t h Rem ote Display, the l ast M Z or RD on ei t her end of t he

network m ust have its termi nator i n the “I N” pos i tion, and all other units m ust have their
terminators in t he “OUT ” position.

NOTE: For mul tiple MZs wi t h Rem ote Display, the t otal l ength of the RS-485 cabl e cannot
exceed 4500 fe et (13 72 m ). (Us e i nst rument c abl e 20 ga uge m ul t i-strand s hi elded and
twist ed pai r – similar or equ al t o Belden cabl e #8762.)

2.7. Connecting to a Building Man age m ent System

The MZ monitor m ay be c onnected t o a Building Management System vi a the RS-485 connector. The node
address on each MZ monitor m ay be s et from 1 t o 15 in order to i dentify i ts el f t o t he Buil di ng M anagem ent
System.

NOTE: Bui lding Mana gement Sy st em s set to a 0 or 1 addr ess both respond t o m ess ages
from t he RD as addr es s 1, t herefor e you s houl d not have a unit s et t o 0 and another s et t o
1 on the same network .

If t h e MZ network is connec ted direct ly to a Buildi ng M anagem ent S ys tem it ma y not be connect ed to the
RD. How ever, t he RD has t wo communications ports, an “ups t ream ” po rt (labeled BMS) and a
“downstream” port (l abel ed TO MONI TORS). A B M S node m ay be connec ted t o the ups t ream RD port whil e
the downs tream RD port talks to the MZ monitors. In this cas e, the B M S is t alki ng “t hrough” t he RD to the
MZ monitors , but not physicall y on t he MZ/RD network.

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NOTE: User must have t wo (2) dedi c ated port s t o suc cess full y c om pl ete t he requi red
setup.

Figure 2-9. Termination Setting s for Multiple Moni tor s Connected to a BMS (Two Trunks)

Figure 2-10. Termi nation Se ttings for Multipl e Monitor s Connec te d to a BMS (Daisy Ch ain )

2.8. PC Software

2.8.1. Operation

NOTE: The MZ is com pat i ble wit h HGM 300 PC s oft ware vers i on 1.52 and hi gher.

However, calibration data c an onl y be edited on t he front panel o f t he MZ, not through t he
PC s oft ware or RDM uni t s.

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com m uni cat i ons param et ers.

NOTE: The PC s oft ware is not com pat i bl e wi th 64-bit (or newer) computers.

NOTE: The PC s oft ware us es COM1 by defaul t . Therefore, t he i nterface cable should be

connect ed to t he port c onfigured as COM 1 on t he PC. Also, no other s oftwa re drivers or
devic es i n the c om puter m ay cont rol COM1 w hen the MZ softw are i s in use. Alternatively,
COM2 (f o r exam pl e) may be used by addi ng a spac e and the number 2 to t he com man d
line as follows:
C:\pc2HGM.exe 2

W hen using a US B t o serial conve rter, be sure it has been mapped t o COM 1 o r CO M 2.
The c onnect i on i s made through a st andard “s traight t hrough” serial port connect i on. A

three-wire c onnect i on i s used (R XD , TXD , and GND). No hardware flow c ontrol is used.
The MZ softwa re aut om atical l y c onfigures COM1 t o m atc h the MZ RS -232

NOTE: Occ asi onal ly, t he l apt op c onnect i on wi ll not connec t properly and only t wo beeps
are h eard and t he program tim es out . To resolve this, di sc onnect the RS-232 cable and
cyc l e power on t he MZ a nd the laptop. A fter b oth are operat i onal , connect the RS-232
cabl e and st art t he software program.

1. Apply po wer t o MZ monitor and al low it t o warm up. Note that on CO

model s, a “Clearing P urge

2

Line” mess age i s di s pl ayed for approximat el y 2.5 m i nut es befo re warm up begi ns.

2. Connect RS-232 interface c able t o t he PC and RS-232 port on the MZ monitor.

3. Insert software disk into t he PC.

4. Ope n the MZ s oftwa re us i ng W i ndows Explorer.

5. Upon st art up, the program wil l i m m edi at el y at tem pt to downl oad dat a from the MZ, as i ndi cat ed by
several beeps.

Naviga te using your PC keyboard:

• Use t he up, down, left, and right arrow keys t o navigate t hrough the s creen options.

• Use t he Enter key to s el ect opt i ons.

• Use t he Esc key t o go back one s t ep.

6. Go to E DIT. From t he E DI T Menu, select SYSTEM. The monitors’ LOCATION becomes
highlighted. Press Enter to move to the TAG ar ea. Use t he Backspace key to remove t he exist i ng
tag. Enter a new tag. Press Enter t o ret urn t o LO CA TION. Select the next item to be addres sed.
Note t hat y ou cannot change the “S N” or “FIRMW ARE” i tems. Press t he Esc key to ret urn t o the
menu bar.

7. Go to EDIT. From t he E DI T Menu, s el ect ZONES. Sel ect a spec i fic zone to i dentify and set
parameters. Wh en RE F RIG ERA NT i s s el ect ed (Haloge n M oni tor), scroll through t he gas li brary t o
locate and s el ec t t he gas type for t hat zone.

8. Setting t he Alarms: Select EVAC LEVEL. Use the Backspace key to clear previous set ting. Type in
the new P P M l evel. Use t he same met hod t o set the s pi l l level and leak level.

9. To clos e or bypass a zone: Set the DISTA NCE to 0 feet.

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Multi-Z one Gas Monitor s

IMPORTANT: When a m odi fied param eter (z one, s ys tem , or cali bration) i s s ent t o the MZ
monitor, please wai t fo r t he com put er software to indi cat e that t he downl oad i s c omplete
be for e cont i nui ng wi t h any f urther edits .

2.8.2. Saving a nd Sendi ng P rogra m s

• W hen savi ng to y our computer, the program wi ll autom at i call y add “.cfg” t o t he fil enam e y ou have
entered.

• To send a saved program to t he MZ, open the program and connec t t he P C to t he MZ. From the
monitor, select SEND SETUP and pres s Enter. The saved progr am wi ll be sent to the MZ.

2.8.3. Tre nd Da ta

NOTE: Creat i ng a t rend data file mus t be done whil e connec ted t o the MZ.

From t he computer, se l ect GET TRE ND DATA . Sel ect the z one t hat you want to t rend and press Enter. The
trend dat a will appear i n a l i st format. Press Enter again to access t he fil e nam e sc reen. Type the file nam e
in for t hat particular zone. Press Enter. The fil e will be saved as a tex t file that can be converted to an Excel
file or printed as i s.

NOTE: The TREND file m ust be saved z one by zone, with a fil ename per zone.

2.8.4. Converting the TR END Tex t File to a Microsoft Excel File

Open Exc el and the des i red fil e. Select “Delimited” format and “Space” as the deli m i ter. Select “General”
as the c ol um n data format . The tex t file will display as an Exc el fil e. When saving, c hange the file nam e
extens i on to “.xls”. Comm ent s or not es m ay be added to t hi s file as needed and saved.

2.8.5. Saving and Printing Screens and Logs

Open the software whil e connec ted t o the MZ. Aft er t he software receives t he program , open the desired
screen (e.g. , s oft ware s creen, al arm log, fault log, di agnos tic sc reen, etc.). Use the Alt and Print Screen
key combination on t he PC k eyboard to c apture t he i m age and pas te i t into a Word document. Save and
print.

2.8.6. USB Type Laptop s

Some laptops have US B ports and no RS -232 9-pin po rt s. A USB-to-serial c onvert er or PCMCIA-to-serial
converter wil l be requi red if a PC MCIA slo t is a vaila ble You wi l l be require d to purc hase a PCMCIA card
that provides an RS-232 output. This i s nec essary f or Wi ndows Vist a and higher versi ons. We
recom mend the PCMCIA card m anufac tur ed by:

SEALEVEL SYSTEMS, IN C.
155 TECH NOLO GY PLACE
P. O. BOX 8 30
LIBERTY, SC 29 657
PHONE – 864-843-4343

www.sealevel.com

Reference part num bers 2105R USB-to-RS 232 or PC-SIO-232 PCMCIA card. A “st rai ght through” RS­232 cable an d a DB25-to-DB 9 adapter wil l be required to connec t t he l apt op t o the HGM-MZ.

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Multi-Z one Gas Monitor s

4 mA DC

n/a

4 mA DC

0 PPM

6 mA DC

2

6 mA DC

125 PP M

9 mA DC

5

9 mA DC

313 PP M

11 mA DC

7

11 mA DC

438 PP M

13 mA DC

9

13 mA DC

563 PP M

15 mA DC

11

15 mA DC

688 PP M

17 mA DC

13

17 mA DC

813 PP M

19 mA DC

15

19 mA DC

937 PP M

2.9. Optional Current Loop Interfaces

NOTE: The two-output, current l oop int erf ace i s an opti on that MUST b e ordered
separately.

2.9.1. Optiona l 4–20 mA DC Outputs

Upon ins t al l ation of the opt i onal 4–20 mA DC Interface Board (P/ N 3015-5152), the MZ has the capabil i t y of
pro vidi ng dual 4-20 mA DC sc rol l i ng current l oop output s for connec t i on to ex ternal m oni toring devices (e.g.,
a loc al l oop-pow ered di splay or a buil di ng m anagem ent system [BMS]).

IMPORTANT: Lo op output s are powered inter nal l y. Do not us e an ext ernal power s upply
as this c an damage the loop card.

NOTE: Optional rem ote loop-powered displ ays are avail abl e to view t he 4-20 m A output s.

The int erfac es are s et up as foll ows :

• Loo p 1 i ndi c ates zone area

• Loo p 2 i ndi c ates PP M .

The 4-20 mA output s ar e scaled to c orrespond t o i ndividual z one num bers and P P M concent rat i ons.
Scali ng f or the 16 (maxi mum) z one numbers i s fix ed (see t abl e bel ow). T he default s cal ing for t he PP M
concentrations provides a 0-1000 PP M ra nge for t he 4-20 mA out put, al t houg h i t can be adjusted t hrough
the LOOP2 FACTOR opti on i n t he SY S TEM S ETUP screen. Refe r t o the t ables bel ow.

Loop 1 = Zone Loop 2 = PPM (Defa u lt: 0.016 mA DC = 1 P PM )

Output Zone Output PPM (Defau lt)

5 mA DC 1

7 mA DC 3
8 mA DC 4

10 mA DC 6

12 mA DC 8

14 mA DC 10

16 mA DC 12

5 mA DC 63 P P M

7 mA DC 188 PP M
8 mA DC 250 PP M

10 mA DC 375 PPM

12 mA DC 500 PPM

14 mA DC 625 PPM

16 mA DC 750 PPM

18 mA DC 14

20 mA DC 16

P/ N: 3015-5074 Rev 1 1 21

18 mA DC 875 PPM

20 mA DC 100 0 P PM

Multi-Z one Gas Monitor s

2.9.2. 4-2 0 m A DC Connections

Ex ternal devices are c onnec ted t o the MZ monitor us i ng a shi el ded dual twist ed pai r cable. Use any of t he
remaini ng servi ce knockouts to gai n acc ess t o the int eri or of the m oni tor. Loc at e the dual 4–20 mA DC
output connector (see below) an d rem ove it from t he circuit board. Sec ure t he wi re l eads to t he connect or
orienti ng them as shown in the diagram below. Check t o mak e sure t he pol ari t y matches the wiring at the
external device. W hen you are t hrough s ecuring the c onnect i ons, c arefull y plug the c onnect or back onto the
ci rcuit board.

NOTE: The gro und connections of the 4-20 m A DC out put c onnect or are com m on.

NOTE: The 4-20 m A DC o ut put connec tor are SIGNA L OUT ONLY. DO N OT APP LY
POWER.

NOTE: It i s hi ghl y recom men ded that a current l oop i solator i s us ed when connect i ng t o

the 4-20 outputs. Bac harach rec om mends t he “Dataf ort h DSC L 21 Loop po wered isolator
DIN mount. ” M ore det ai led information can be fo und at ww w.dat aforth.com.

NOTE: When one or bot h current l oop out puts are not used, i nst al l a j um per wire between
the ground an d the unus ed loop t erm inal(s ) t o prevent the s yst em fr om generati ng a
current l oop fault.

Figure 2-11. Optional Dua l 4-20 mA DC Output Board f or the Mul tiZone

CA UT ION: The l oop output s have isol at ed grounds. Theref ore the c abl e shield s houl d be

terminated at the rec eiver and not the MZ mo nitor. The si gnal for bot h current loops must
be returned t o the MZ moni tor.

22 P/N: 3015-5074 Rev 11

Figure 2-12. Optional Dual 4-20 mA DC Ou tput Board and Connector

2.10. Connecting Ext ern al Alarm s

Multi-Z one Gas Monitor s

2.10.1. Overview

The MZ monitor includes fou r SP DT rel ay s whose cont acts are rated 2 A at 250 VAC (induc tive) and 5 A at
250 VA C (res i st i ve). These relays are us ed for the connect i on of ex t ernal al arm devices that are act i vated
when the relay is energi z ed. The rel ays are fac tory ass i gned to energize under t he following c ondi t i ons:

Relay #1 Leak Al arm Point 100 ppm
Relay #2 Spill Alarm P oi nt 300 ppm
Relay #3 Evacuate Al arm P oi nt 500 pp m
Relay #4 Fault S ys tem Faul t E vent

2.10.2. Connection

Use t he condui t or any of the rem ai ni ng servi ce knockouts to gai n cable acces s t o the interior of the m oni tor.
Locate t he rel ay connect or (see Figure 2-3 on page 13) and remove it from t he circuit board. S ecure t he
leads to t he connec tor orient i ng them as shown in t he di agram bel ow. When you are t hrough sec uri ng the
connections, carefully plug the c onnect or back onto t he circuit board.

Figure 2-13. M Z Monitor Rela y Connec tor

Each rel ay may be connec t ed as norm al l y open (NO), or normally closed (NC). The relay c ont act s are
rated 2 A at 250 V A C (induct i ve) and 5 A at 250 V AC (resi st i ve).

Power f or t he alarm de vices c onnect ed to t he relay cont act s may be s uppl i ed by an ex ternal 24 VDC
power sourc e or the m oni t or’ s A C input terminals. In the fi rst wi ring diagram, power t o t hi s device is bei ng
tapped off the m oni t or’s A C i nput. In the second wiring diagram, power is s uppl i ed from an ext ern al
power sourc e.

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Multi-Z one Gas Monitor s

Jum per the “Live/ P osi t ive” li ne of an ex ternal power sourc e ( DC devices ) or t he m oni tor’s A C i nput (AC
devices) to t he “Common” t erm i nal on the relay c onnector.

Connect the “Live/Positive” end of the s t robe or horn to the “NO” terminal of w hi chever level of alarm is
app ropriate fo r the appli cat i on.

For p rotec tion, inst al l an i n-li ne fuse of t he appropriate size and design for t he ext ernal al arm device being
used.

The ot her end of the st robe or hor n is connect ed to t he “Neutral/Negative” l eg of t he ext ernal power
source (DC devices ) or monit or’ s A C input (AC devi ces).

Figure 2-14. Typical AC Externa l Alarm Re lay 1 Wiring

Figure 2-15. Typical DC Externa l Alarm Re lay 1 Wiring

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Multi-Z one Gas Monitor s

SECTION 3. SETUP PRO GRAMMING

3.1. Initial Power Up

W hen t he MZ monitor i s powered up, al l front panel LEDs will illuminate a nd a s pl ash sc reen will appear,
displaying t he monitor’s firmwa re version le vel. Note t hat on CO
mes sage is di splayed fo r approxi m at el y 2. 5 m i nutes before warm up begi ns. After a m oment, the Warm
Up screen will be displayed and the green MONIT OR ON light will blink.

After a 15-minute warm up cycle, the M O NIT OR ON light will glow s t eadi l y and t he Data Display screen
will be di splayed. (S ee A ppendix C for an overview map o f the screens i n the s ys tem . )

3.2. Data Display Screen

model s, a “Cl earing Purge Line”

2

Figure 3-1. Data Display Screen and Front Pa nel Keypad

3.3. Navigating to the 1st Set up Scr een

From t he Data Display S creen, press t he UP or DOW N arrow key. S E TUP wil l be hi ghl i ght ed i n the firs t
box. Press ENT ER t o sel ec t thi s opt i on and display the Setup screen (s ee bel ow).

Figure 3-2. System Setup Screen #1

3.4. Navigating to the 2nd Setup Screen

From System Setup Screen #1, select the SYSTEM option to go t o Syste m Setup Screen #2. Select the
ESC key to return to t he System Setup Screen #1.

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Multi-Z one Gas Monitor s

Figure 3-3. HGM System Se tup Screen #2

3.4.1. Location

This is the name you ass i gn to t he MZ monitor t o i dentify i ts l ocat i on. It m ay have up t o 12 al phanumeric
characters.

1. Pres s t he ENTER k ey t o adj ust the s ett i ng.

2. Use t he LEFT/RI G HT curs or key s t o m ove acros s t he entry fiel d and the UP/DOWN c ursor k eys
to m odi fy t he i ndividu al charact ers .

3. Press ENTER to ac cept the new ent ry or ESC to revert t o the previous s ett i ng.

3.4.2. Numbe r of Zones Insta l l ed

IMPORTANT: Do not change t he number of zones to deact ivate unus ed zones. Changi ng

the number of inst al led zones is only nec essary when m ani f ol d block s are added or
remove d. Go t o the individual zone t hat y ou wi sh t o di sable and set i ts di st ance t o zero.

1. Pres s t he ENTER k ey t o adj ust the number.

2. Use t he UP /DOWN c ursor k eys t o m odi fy t he num ber (must be 4, 8, 12, or 16).

3. Press ENTER to acc ept t he new num ber or E SC to reve rt to t he previous set ting.

3.4.3. Al arm Acknowledge Mode

This function program s t he rel ay s in t he unit for latching or non-latc hi ng operation.

1. Pres s t he ENTER k ey t o adj ust the s ett i ng.
Use the UP/DOWN c ursor k eys t o t oggl e between s ett i ngs.

AUTO Non-lat ching (Alarm relay wi l l aut om atical l y de-en ergi ze when t he gas level drops

below it s al arm point.)

MANUAL Latching (Alarm rel ay rem ains energi zed, and wi ll not release until the alarm

condition has been manually ac knowl edged. Refer t o A cknowledgi ng A l arm s on
Page 35.)

2. Pres s E NTER t o acc ept t he new ent ry or E S C t o revert to t he previous set ting.

3.4.4. Audible Ala rm

This parameter s el ect s the funct i on of the MZ monitors i nternal audi bl e al arm device.

1. Pres s t he ENTER k ey t o adj ust t he set ting.

2. Use t he UP /DOWN c ursor k eys t o select unused, m oni tor on, evac uate, spil l , l eak , fault , or alarm .

3. Press ENTER to ac cept the new ent ry or ESC to revert to t he previous setting.

NOTE: In “Moni tor On” mode, t he uni t wil l onl y give audible alarm s on a c ri tical fault that
stops the unit fr om m oni t ori ng.

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Multi-Z one Gas Monitor s

3.4.5. Zone Hold

Set s the lengt h of t i m e a zone wil l be m onitored when t he z one hol d feat ure is activated. The de fa ul t is 15
minutes. The range is 1 to 999 minutes.

1. Pres s t he ENTER k ey t o adj ust this s ett i ng.

2. Use t he LEFT/RI G HT curs or key s t o m ove acros s t he entry fiel d and the UP/DOWN c ursor k eys
to m odi fy t he i ndividu al numbers .

3. Press ENTER to ac cept the new ent ry or ES C to revert to t he previous set ting.

3.4.6. Dete ction Lim i t

This is es sent i ally a squel c h sett ing t hat inst ruc ts the i nst rum ent t o i nt erpret PP M readings bel ow t he
desi gnated level as 0. The ra nge i s 1 to 99 P P M.

1. Pres s t he ENTER key to adj ust the s ett i ng.

2. Use t he UP /DOWN c ursor k eys t o m odi fy t he set ting.

3. Press ENTER to acc ept t he new entry or E S C to revert to t he previous set t i ng.

3.4.7. Loop Mode

This s ets the loop m ode of t he t wo opt i onal 4-20 m A output s. Opti ons are:

• trac k zones mode (default)

• highes t P P M concent rat i on mod e.

NOTE: Both LOOP M O DE ( fo r select i ng trac k z ones o r hi ghest P PM m ode) as wel l as t he
LOOP2 F AC TO R ( for s cali ng the P P M output ) are configured f rom t he SE T UP m enu.
Configure one, t hen press E NTER to acces s t he other.

In trac k zones mode the MZ adjust s the ZONE and PP M output s t o corres pond to t he l at est sam pl ed
zone num ber an d i ts corres ponding P P M conc entrat i on, res pect ively . F or example, i f the MZ samples
zone #9 at 63 P P M , t he Z ONE and PP M output s would read 13 m A (corres ponds t o zone #9) and 5 m A
(corres ponds to 63 PP M ), respec tively, unti l the next zone is s am pl ed. This c onti nues in a cy cl i c fas hi on
through each z one. Not e t hat t hi s ex am pl e assumes LOOP2 Fact or was left at i ts default value (0. 016).
This can be adj ust ed t hrough the LOOP 2 FAC TOR o pt i on i n the S Y STEM SETUP sc reen.

In highes t concent rat i on (PPM) mode t he MZ adjust s t he two c urrent output s t o corres pond to t he zone
number that has t he hi ghest PP M conc entrat i on and t he corres ponding value of t hat conc entrat i on,
respect ively . Unl i ke t rac k zones mode, this m ode wil l adj ust the t wo out puts to c orrespond t o whi chever
zone has t he hi ghest PP M c oncent ration. For exam ple, i f z one #9 i s s am pl ed at 125 P P M , t he two
4-20 m A output s wil l read 13 m A and 6 m A, respec tively, as l ong as it c ontinues t o sam pl e at 125 PP M or
unti l a di f ferent zone s am ples a conc entrat i on great er than 125 P PM.

3.4.8. Loop2 Factor

This s ets the P P M sc al e fac tor for current l oop num ber 2. A ft er set t i ng the loop m ode, t he m enu box
changes t o a l ower-level m enu that al l ows you t o set the Loop2 Fact or. To cal culate t he current out put,
multipl y the scal e factor by the PPM and add 4. For ex ample, at the default scale fac tor of 0.016, a
meas urem ent of 100 ppm woul d generate a c urrent output of 5. 6 m A DC. The current output cannot exceed
the 20 m A DC capac i ty of the interface.

1. Pres s t he ENTER k ey t o adj ust the s ett i ng.

2. Use t he LEFT/RI G HT curs or key s t o m ove acros s t he entry fiel d and the UP/DOWN c ursor k eys
to m odi fy t he i ndividu al charact ers .

3. Press ENTER to ac cept the new en try or ES C to revert to t he previous set t i ng.

NOTE: Both LOOP M O DE ( fo r select i ng trac k z ones o r hi ghest P PM m ode) as wel l as t he
LOOP2 F AC TO R ( for s cali ng the P P M output ) are configured f rom the S E T UP m enu.
Configure one, t hen press E NTER to acces s t he other.

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3.4.9. Re-Zero Mode

This parameter defines the freq uenc y at whi ch t he i nst rum ent re-z eros t he optical sensor.

1. Pres s t he ENTER k ey t o adj ust the s ett i ng.

2. Use t he UP /DOWN c ursor k eys t o t oggl e between s ett i ngs.
AUTO Sets the instrument to re-z ero every 10 m i nut es.
ZONE CHANGE Set s t he i nst rum ent t o re-z ero at each zone c hange. This i s the m os t acc urat e

setting, but increases the t i m e i nt erval between m easurement c ycles.

3. Press ENTER to ac cept the new ent ry or ES C to revert to t he previous set ting.

3.5. Navigating to the 3rd Setup Screen

3.5.1. Overview

From System Setup Screen #2, sel ect the MO RE opt i on t o go t o System Setup Screen #3. Select the
BA CK option to return t o System Setup Screen #2.

Figure 3-4. System Setup Screen #3

NOTE: The RS 4 85 BAUD rate tex t is replac ed by “S ervice Timeout” w hen i n Servic e
Mode.

3.5.2. Bau d Rate

This parameter defines the baud rat e for t he RS -485 c om m uni cat i ons port.

1. Pres s t he ENTER key t o adj ust the s ett i ng.

2. Use t he curs or keys to s croll through a li st of avail able ba ud rat es t o sel ect t he desi red baud rat e.

3. Pres s E NTER t o acc ept t he new ent ry or E S C t o revert to t he previous set t i ng.

3.5.3. Node Address

Each moni tor on t he net work m ust has a dist i nct node address. The node address may be set from 1 to 64.

1. Pres s t he ENTER key t o adj ust the s ett i ng.

2. Use t he LEFT/RI G HT curs or key s t o m ove acros s t he entry fiel d and the UP/DOWN curso r keys
to m odi fy t he i ndividu al numbers .

3. Pres s E NTER t o acc ept t he new ent ry or E S C t o revert to t he previous set t i ng.

3.5.4. Password

This fiel d i s us ed to define a s yst em pass word. The defaul t set ting is 000, whi ch provi des no pas sword
protection.

1. Pres s t he ENTER k ey t o adj ust the pas sword.

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2. Use t he LEFT/RI G HT curs or key s t o m ove acros s t he entry fiel d and the UP/DOWN cursor keys
to m odi fy t he i ndividu al alphanumeric characters.

3. Press ENTER to ac cept the new pas sword or E SC t o reve rt t o the previous set ting.

NOTE: After ent ering the passwo rd (incl uding t he 1st ti m e i t is set), t he M Z be gi ns a 30-
minute “inact ivi ty ” t i m er that i s res et every t i m e a key i s pres sed. When t he tim er reaches
zero, password acces s i s enabl ed. To enable pas sword protect i on sooner, cy cl e power on
the M ul t iZone. When passwor d pr otect ed, a passw ord entry i s required i n order t o view
screens other t han t he SY STEM or ZO NE V IE W sc reen.

3.6. Additional Service Features

The Service M ode opti on i s locat ed on the System Setup Screen i n the bottom ri ght corner. When
activated, the S ervice Mode will di sable the M Z unit for a s pecified l ength of ti m e. The default i s 5 minutes.
This t i m e i nt erval can be c hanged as desc ri bed i n t he Servic e T i m eout section below.

IMPORTANT: Note t hat while in t he Servic e M ode no measurem ents are m ade, nor are
any al arm s activated.

Acce s s the ser vice mode opt ions from the ini tial Data Display Screen. P ress the SERV ICE M ODE EN TRY
option twice within 3 seconds. To exi t t he S ervice M ode, agai n press the SERVI C E MO DE E N TRY option
twice within 3 seconds.

Several features can be viewed on t he Sy st em Set up S creen #3 when t he m oni t or is pl aced i n service
mode. Whi l e i n s ervi c e mode, the user can identify the m odel num ber, set digi pot values and sensor
temperature, and acquire t he tempe rat ure coef fici ent .

Figure 3-5. System Setup Screen #3 (Se r vi ce Mod e)

3.6.1. Service Ti meout

Dis played i n S ervice M ode. Set s t he l engt h of t i m e the Service M ode i s in effect. Stops the moni t or for up t o
300 minutes (5 hrs) t o all ow for s ervicing the unit.

1. Pres s t he ENTER key t o adj ust the s ett i ng.

2. Use t he LEFT/RI G HT curs or key s t o m ove acros s t he entry fiel d and the UP/DOWN c ursor k eys
to m odi fy t he i ndividu al numbers .

3. Pres s E NTER t o acc ept t he new ent ry or E S C t o revert to t he previous set t i ng.

3.6.2. D ET Digipot

Th e DIGIPOT funct i on al l ows manual and a m ore prec i se adj ust m ent of t he di gi t al potent i om eter, which
controls t he voltage of the I R Det ect or. The DIGIPOT is aut o tuned at every power up.

1. Press the ENTER k ey t o adj ust the s ett ing. Once t he opt i on is s el ect ed the sc reen wil l al s o di spl ay
the voltage.

2. Use t he UP /DOWN c ursor k ey t o m odi fy t he digipot value.

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CPU Res et

3.6.3. Node Address

Each moni tor on t he net work m ust has a dist i nct node address. The node address may be set from 1 to 64.

1. Pres s t he ENTER key t o adj ust the s ett i ng.

2. Use t he LEFT/RI G HT curs or k ey s t o move across the ent ry field and the UP /D O WN c ursor k eys
to m odi fy t he i ndividu al numbers .

3. Press ENTER to ac cept the new entry or E S C t o revert to the pre vio us s etting.

3.6.4. Sensor Tempera ture Coefficient (For Factory Use Only )

This field is typically for factory use only. A cust om er may need to enter a t em perat ure coef fici ent i f t he IR
bench i s replaced and a new tem perat ure coeffici ent is suppli ed with t he repl acement benc h. Not e,
however, changing thi s s ett i ng wil l void the c al i brat i on.

3.6.5. Password

Thi s field i s us ed to define a s yst em pass word. The defaul t set ting is 000 (no password protect i on).

1. Pres s t he ENTER key t o adj ust the pas sword.

2. Use t he LEFT/RI G HT curs or key s t o m ove acros s t he entry fiel d and the UP/DOWN c ursor keys
to m odi fy t he i ndividu al al phanumeric c haract ers.

3. Pres s E NTER t o acc ept t he new pass word o r E SC to revert to t he previous s ett i ng.

3.6.6. Acquiring Te m pe rature Coefficie nt (For F actor y Use Only)

This field i s for fact ory use onl y . Changing this set ting wi ll voi d t he cal i brat i on.

3.6.7. IR Digipot

This opt i on i ndicat es the el ec trical param eters of t he i nfrar ed em i t ter.

3.7. Est ablishing the CO2 Sensor Baseline

At power up, an automatic zeroing s equence es tabli shes t he CO2 s ensor baseli ne. A t that tim e, t he M Z
assum es the defa ul t ambi ent CO

• the purge l i ne was n’ t c onnect ed to t he i nst rument, or

• the purge l i ne was not t erm i nated in fres h ai r,

then the sensor bas el i ne may be com prom i sed. If you sus pect that the bas el i ne was c om prom i sed, then
you can re-es t abl i sh t he proper CO
following the proc edure below.

1. Rest art t he m oni tor by ei t her (a) cy cl ing the power, or (b) pres sing the CPU reset switc h on the
main printed ci rc ui t board (see Figure 3-6).

WARNING: If using the CPU reset switc h to res t art t he i nst rument, ex treme care
shoul d be exerc i sed when ac cess i ng the interior of t he m oni t or. This i ncl udes
touching a non-pai nt ed ar ea of the MZ chas sis t o provide proper grounding pri or to
touching the CPU reset switc h or any ot her i nter nal com ponents . Fail ure t o touc h a
gro undi ng area can all ow st at i c el ec trici t y on y our cl ot hi ng or body t o dam age the
monitor. S uch dam age i s not covere d under warrant y.

2. After the res tart and t he warm-u p have c omplet ed, t he i nst rum ent is ready for us e.

level of 386 ppm . However, i f:

2

s ensor bas el i ne by ens uring the purge l i ne i s properly inst al l ed and

2

Switch

Figure 3-6. Location of CPU Reset Button

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SECTION 4. GEN ERAL OPERATION

4.1. Functional Ov erview

Normally each MZ monitor wil l sequent i al ly perf orm m easurements on its ac tive zones wit hout user i nput.
The t ot al tim e it tak es a MZ monitor t o compl ete a m eas urem ent cy c l e is direct l y proporti onal to t he num ber
of act i ve zones and the phy si c al l ength of the ai r l i nes. M oni t ors li nked together on a netwo rk operate
independent l y of each other and c onsequent l y c om pl ete t hei r res pect i ve measurem ent cyc l es at different
rates.

The Remote Di splay operates by pol l i ng the network appr oxi m at el y once every 12 s econds t o det erm i ne the
current st atus of t he MZ monitors . If more than one MZ is connec ted t o the network, i t wi l l sequential l y poll
each m oni tor for it s st at us. As a prac tical m att er t hi s sim ply m eans t hat t he m ore compl i cat ed the net work ,
the l onger it wil l t ake the RD to updat e t he st atus i nformation for all zones .

4.2. The Zone Setup Screen

From S ystem Setu p Screen #2, scroll down t o select the ZONES option.

Figure 4-1. Zone S etup Screen #1

4.2.1. Location

This is t he nam e you ass i gn t o the MZ monitor t o i dentify the z one location. It m ay have up to 12
alphanumeri c c haract ers.

1. Pres s t he ENTER k ey t o adj ust the s ett i ng.

2. Use t he LEFT/RI G HT curs or key s t o m ove acros s t he entry fiel d and the UP/DOWN c ursor k eys
to m odi fy t he i ndividu al charact ers .

3. Press ENTER to ac cept the new ent ry or ES C to revert to t he previous set ting.

4.2.2. Ga s/ Re frige ra nt Type

This parameter defines the kind of gas the MZ is detecting.

1. Press the ENTER k ey t o adj ust the s etti ng;

2. Use t he LEFT/RI GHT cursor k eys to select t he ty pe of gas y ou want the devi ce t o detec t. (Options
differ dependi ng on m odel ).

3. Press ENTER to ac cept the new entry or E S C to revert to t he previous set ting.

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4.2.3. Di stance + EXH

This parameter defines the com bined l ength of the sam ple tubi ng plus any t ubi ng on the ex haust port. Total
lengt h should not ex ceed 1200 ft.

1. Pres s t he ENTER k ey to adjust the sett i ng.

2. Use t he LEFT/RI GHT cursor k eys to move ac ross the ent ry fiel d and the UP/DOWN c ursor k eys to
modify the indivi dual charac t ers.

3. Press ENTER to ac cept the new entry or ESC to revert to t he previo us setting.

4.2.4. Temp @ Zone

This parameter i s us ed to set the expect ed tem perat ure of the ai r at t he zone being sam pl ed. The value is
used to c al culate the STP P P M val ue shown in the diagnost i c sc reen only.

1. Pres s t he ENTER k ey to adjust the sett i ng.

2. Use t he LEFT/RI GHT cursor k eys to move ac ross the ent ry fiel d and the UP/DOWN cursor k eys to
modify the indivi dual charac ters .

3. Press ENTER to ac cept the new entry or E S C to revert to t he previous set ting.

4.2.5. Current De tection Reading

This reading displays the current PPM level of t he select ed gas.

4.2.6. Log Inte rva l

The MZ retai ns a data log of 10 0 m easurements for eac h zone. The log int erval is the number of mi nutes
from 1 to 1440 bet ween each log poi nt. This param et er can be changed from Zone Se tup Screen #1.

The def ault s ett i ng for t his param et er i s 10 mi nutes . If the log int erval tim e i s set to 0, then a m easurement is
recorded i n t he trend l og aft er ev ery m easurement c yc l e. Therefor e, after t he trend log i s fill ed, it will conta in
the l ast 100 m easurement points for a z one. If you want t he dat a l ogged l ess frequently, increase this
value. It i s i m portant to remember that cycle t i m e is depende nt on many fac t ors, i ncludi ng the number of
zones monitored, i nput l i ne l engt h, and t he run zeroing m ode selected. B efore c hangi ng t hi s value i t m ay be
useful to firs t review the log data us i ng the Trend Screen to determine t he nom i nal cyc l e tim e.

4.3. Navigating to the 2nd Zone Setup Screen

Select the MORE opti on at t he bot tom right s i de of t he firs t Zone Set up screen t o cont i nue to t he next
screen c ontaini ng m ore options. This sc reen di s pl ays the peak PP M value in the upper left s i de of the
screen.

Figure 4-2. Navigating from the Fi r st to the S e cond Zone S cre e n

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4.3.1. Leak L evel

This is t he concent ration l evel i n PP M t hat wil l act i vate a leak alarm condition.

1. Pres s t he ENTER k ey t o adj ust the value.

2. Use t he UP /DOWN c ursor k eys t o m odi fy t he set ting.

3. Press ENTER to ac cept the new ent ry or ES C t o revert t o the previous s ett i ng.

NOTE: The leak le vel valu e must be l ess than t he spil l level.

4.3.2. Spill Level

This is t he conc entrat i on l evel i n P PM that will act i vate a spi l l alarm condition.

1. Pres s t he ENTER k ey t o adj ust the value.

2. Use t he UP /DOWN c ursor k eys t o m odi fy t he set ting.

3. Press ENTER to ac cept the new ent ry or ES C t o revert t o the previous s ett i ng.

NOTE: The spill le vel value must be l ess than t he evac uation level and g reat er than t he
leak level.

4.3.3. Evacuation Le ve l

This is t he conc entrat i on l evel i n P PM that will act i vate an evacuat e al arm condition.

1. Pres s t he ENTER k ey t o adj ust the value.

2. Use t he UP /DOWN c ursor k eys t o m odi fy t he set ting.

3. Press ENTER to ac cept the new ent ry or ES C t o revert t o the previous s ett i ng.

NOTE: The evacuation level valu e m ust be greater t han t he spi l l level.

4.3.4. Re-Setting the Pea k PPM Va lue

Pres si ng t hi s k ey res ets the current peak P P M l evel s t ored i n m em ory and di spl ay s i t at the t op of t he
screen.

4.4. Alarms

4.4.1. Functional Ove rvie w

If the PP M l evel for any z one exceeds i ts desi gnated s pi l l, l eak, or evacuat e t hreshol ds , an al arm condition
will be c reated. Once t he MZ monitor com pl et es a m easurement cycl e in the affected zone t he al arm
condi tion wi ll be i ndi cat ed. At that tim e the red A LA RM LE D on the MZ monitor wi l l gl ow. A ddi tional l y, an
external al arm de vice may act i vate and an a udi bl e alarm may s ound i f t hose features have been ena bl ed.

The nex t time the RD poll s t he affected moni tor its red A LARM LE D will gl ow. Addit i onal l y, an external
alarm device m ay activate and an a udi bl e al arm may sound if t hose features have been enabled.

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4.4.2. Responding to Ala rms

An operat or can res pond to t he al arms by acc ess i ng t he Alarm Summa r y S creen. Navigate t o t hi s s creen
by select i ng ALA RM on the firs t (Data Display) scree n.

Figure 4-3. Alarm S u mm ar y S creen

The Alarm S umma r y S cr een display s a lis t of all alarm c ondi t i ons pending acros s the net work . The sc reen
is di vided into 8 boxes , and eac h box repres ents a si ngl e alarm . If more t han 8 al arm s are pending, the
MORE opt i on wi ll be di spl ay ed at t he bott om of t he s creen t o perm i t access to t hat additional information.

Each box di splays the z one num ber, z one nam e, and t he current P PM readi ng. A flas hi ng box indicat es an
alarm that has not been ac knowledged. A st atic box represents an al arm that has been ac knowledged, but
has not y et been c l eared fr om the s ystem.

4.4.3. Al ar m Detail S c reen
To further inves tigate an alarm, press the ENTER key to go to the Alarm Detail Screen.

Figure 4-4. Alarm Detail Screen

The Alarm Detail Screen displ ays m ore comprehensive information about t he nature of the al arm including:

• Com pl ete locat i on information

• Gas ty pe and c urrent concent rat i on (CONC NOW)

• Peak concentration and peak ti m e

• Typ e of al arm , alarm tim e, and date.

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This s creen provides t he following navigation opt i ons at the bot t om of the displ ay:

ACK Using t he l eft arrow key , ac knowledges t he al arm as desc ri bed i n t he next s ect i on
SETUP Usi ng the right arrow k ey, navigate t o t he Zone S e tup Scre e n #1. This ena bl es re vi ew of

the zone s etup parameters and acces s to the Trend Scre en.

Use t he ES C but ton on t he front cas e to go bac k to the previous m enu.

4.4.4. Acknow l edging Alarms

Each pending al arm may requi re, depending upon s el ect ed al arm m ode, ac knowledgm ent befor e t he
system returns to normal operat i on (refer to Alarm A ck Mode on page 26). To acknowledge an al arm,
na vigate t o t he Alarm Detail Screen and sel ect the A CK option as previousl y des cribed. Y ou wil l then be
returned t o the Alarm Summary Screen and t he box associ ated wit h that al arm wi l l no longer be bli nk i ng,
indicat i ng that the alarm has been ack nowl edged. Repe at t hi s proc edure to ac knowledge any remai ni ng
alarms.

Figure 4-5. Alarm S u mm ar y S creen (Acknowle dge Mode )

Once al l the alarm s assoc i ated wit h a gi ven MZ monitor are ac knowledged, i ts RE D L E D wil l turn off and
any ext ernal al arms connec ted t o the MZ relays will de-acti vate. A l l pendi ng al arm s ac ross the entire
network m ust be ack nowl edged befor e the Remote Display returns to normal operat i on. Once t hat occurs ,
it s RED LE D wil l turn off and any assoc i ated external al arm s connect ed t o the RD relay s will de-activate.

Keep i n m ind that the system wi l l cont i nue to generat e new alarm s if PP M values above the alarm
thres hol ds are det ect ed.

4.4.5. Silencing an Alarm

W hen al arm s ar e act ive, t he ES C k ey funct i ons as a sil ence k ey. During an act ive alarm and with the
main sc reen displayed, press t he E SC k ey . Thi s wil l generate a prompt t o “PRES S E NTER T O CONFIRM
SILENCE”. When EN TER i s pressed, t he LEA K rel ay wil l open and the internal audi ble alarm (if ena ble d)
will t urn off. In thi s way , when t he LE AK relay i s us ed to operat e st robes and h orns, t hey can be quickly
si l enced wit hout eff ect i ng t he SPILL or E VA C, which may be c ontroll i ng fans or vent i l ation equi pment .
This “silence” mode wi l l be i ndi cat ed by a r everse flas hing “S” in the alarm window. “S i l ence m ode” wil l be
autom at i cal l y canceled if the al arm condition of any zone c hanges by c l eari ng or ele vat i ng to a higher
level.

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4.4.6. Cle aring the Ala rm Event Log

A dat a l og of the last 20 alarm event s is retained i n m em ory.

• From t he Data Display Screen, press the UP or DOWN arrow k ey . SETUP will be hi ghl i ghted in
the firs t box .

• Pres s t he DOWN arrow k ey unt i l Alarm Event Log is hi ghl i ghted, then pres s ENTER to sel ect t his
opti on and di s pl ay t he Alarm Eve nt Log (see below).

Figure 4-6. Accessin g the Ala rm Event Log

This screen lists zones i n the left colum n and di splays which alarms were associated wit h each zone as
represent ed by t he vert i cal curs or bar. As you move t he bar hori z ontal ly using the LE F T/RIG HT cursor keys,
the dat e and t i m e t he alarm condition was det ect ed is dis pl ay ed i n the upper right hand c orner of the di spl ay
window.

NOTE: Th e A l arm Eve nt Log can be reset by pres sing a combinat i on of t he EN TER and
RIGHT arrow but tons whi l e viewi ng t he log.

4.5. System Faults

4.5.1. Functional Ove rvie w

If a syst em m al func tion occ urs, the y el l ow FA ULT LED will glow. A ddi tional l y, an ext ernal al arm de vice may
activate and an a udi bl e al arm may sound i f those features have been enabled (see Co nnect i ng External
Alarms on page 23 and Audible A larm on page 26).

The nex t time the Remote Display polls the affected moni t or i ts yell ow F A ULT LED will also glow.
Addi t i onal l y, an ext ernal al arm de vice m ay ac tivate and an au di bl e al arm may s ound i f those feat ures have
been en abl ed (see C onnect i ng E xt ernal A l arm s on page 23 and Audibl e Alarm on page 26).

Dependi ng on the nat ure of t he fa ul t, the MZ monitor may or m ay not c ontinue to operat e norm al l y . Under a
non-critical fault condi t i on, t he MZ will conti nue to m eas ure and l og data, but som e peripheral func tions m ay
be com prom i sed. Under a c ri tical fault c ondi tion, acti on is requi red fo r the MZ monitor t o operate normal l y.
The t able on the followi ng page l i st s the vari ous fault c ondi tions and expl ai ns what act i on should be tak en to
correc t t he probl em . Note that the fault codes are cum ul ative. For ex am pl e, a c ode <4200> i s bot h a
<4000> “REZERO VOLT TOL” a nd <0200> “GA IN S E T FAULT” c om bi ned, i ndi c ati ng t wo sim ultaneous
faults.

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Multi-Z one Gas Monitor s

and press the FAULT key. This will display

ha s bee n c leared, the MZ monitor will retur n t o normal oper ation after the

. Verify that t he length of t he purge line

4.5.2. Navigating to the Fa ul t Screen

Dis pl ayed on t he i ni tial Data Display Screen is a Fault opti on. Scrol l down with t he curs or k ey and select
thi s opt i on, whic h wi ll i ntroduc e you t o the Fault Screen.

Figure 4-7. Fault Screen

4.5.3. Critical Faults

Fau lt Code Description / Possible Causes

NO FLOW ON ZONE <0800>

Go to the Data Displ ay S creen
a “NO FLOW ” message in each individual zone af fected. Check f or a
blockage in t he air sampl e line or at t he line end filter. Once the blockage

zone has been sampled.

NOTE: This can t ake s ome several m i nutes since i t i s
dep endent upon how many z ones t here are and t hei r
lengt hs. The MZ wil l cl ear t he fault the next t i m e i t
polls t he eff ect ed zone and t he RD wil l return to
normal operation the nex t t i m e that i t pol l s t he M Z.

NO FLOW ON PURGE <1000>

CLIPPING FAULT <8000>

REZERO VOLT TOL <4000>

OVER R ANGE
DETECTED

ZERO FILTER FAULT <0100>

GAIN SET FA ULT <0200>

A2D FAULT <0400> A nalog to digital conv er ter not wor k ing.

<2000>

Check the pur ge line for a bloc k age
and exhaust line do not exceed 500 feet in length.

The detector voltage may be out of tolerance. For inf or mation on
tr oubleshoot ing this ty pe of fault , refer to section 5.3 on page 50.

The detector output voltage is out of tolerance. For inf or mation on
tr oubleshoot ing this ty pe of fault , refer to section 5.3 on page 50.

This i ndicate s that the measured conc entration on one or more zone s have
exceeded the measurement r ange. For informat ion on troubleshooting thi s
type of fault, refer to section 5.3 on page 50.

Indic ates cont amination in the purge air, or if a charcoal filter i s in u s e, the
filter may need t o be c hanged.

Indic ates sen sor gain (digipot ) is out sid e ac c eptable r ange. For
information on troublesh ooting this type of fault, refer to section 5.3 on
page 50.

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Multi-Z one Gas Monitor s

re is outside normal range (or I R s ensor has

subjected to extreme temperature s. Verify that the ventilation h oles are not
Manifold pressure is out sid e normal oper ating r ange (or sensor has fail ed) .

Number of M Z monitors on Networ k field. Check

are properly programmed. Chec k to ensure that

cable connect or in each MZ unit is securely fastened

4.5.4. Non Critica l Faults

Fau lt Code D escription / Possible Causes

BOX TEMP FA ULT <0001>

BENCH TEMP FAULT <0002>

PRESSURE SENSOR <0004>

RS485 F AULT <0008> RS-485 Com mun ic ations Error.
LOOP FAULT <0010>

CONFIG FAULT <0080>

Enclosure’s inter nal temp er atu
failed) . Check the installation to verify that the monitor is not being

ob str uc ted. Refer to the Diag nostic Screen f or the ZERO temperatur e,
BNCH t emperat ur e and BOX temperature. Call the factor y with this
information for f ur ther in str uc tions.

Optical bench is outside of nor m al operatin g r ange (or sen sor has failed).
Check the installation to verify that the monit or is not bei ng subject ed to
extreme tem peratur es. Check the Diagn ostic S creen for t he ZERO
temp er ature, BNCH temperat ure and BOX temperature. Call t he factor y
with this informati on for fur ther in str uc tions.

Check the Diagnostic S creen recor d ALL data. Call the fac t or y with this
information for f ur ther in str uc tions.

This w ould only be displayed if the dual 4-20 mA DC option was in stalle d
and on e or both current loops are open. Chec k the wiring to
load/monit oring circuit on both 4-20 mA loops.

Ther e is an error in Setu p Screen #2 – Number Zones Install ed field, or in
R DM Setup S creen #1 –
that the number of zones installed for eac h MZ unit and the actual number
of M Z units on the net work
the ma nifold solenoid
to its term inal connector. If neces sary, r eset to the fac tory default settings.

4.5.5. Reset to Factory Defau lt S ettin gs

IMPORTANT: P erformi ng this f unct i on wi pes out al l program parameters, al arm s, fault s,

trends and l og files.

1. Pres s and hol d down t he UP and DO WN arrow k ey s on the MZ monitor (page 13).

2. Cycl e AC power OF F t hen O N.

3. Hold the keys until the s econd beep i s heard.

4. The s creen wil l indi cate “This uni t has been res et t o fac tory default conditions”.

5. Rele ase t he keys .

6. Reprogram the MZ as described in this m anual.

4.5.6. Cle aring System Faults

If t h e faul t condit i on i s as sociat ed wi t h an MZ, t he m oni t or wi l l return t o norm al operation soon after the
problem i s c orrect ed. At that time the Y E LLOW LED wi l l turn off and any ex ternal al arm s connected to the
monitor’s alarm relays wil l also t urn off. The RD will ret urn t o norm al operation the nex t ti m e it poll s t he
affected MZ monitor.

Once the s yst em m al func t i on has been c orrect ed i t may take som e t i m e for t he fault condition to clear
com pl etely. If the fault i s associated with a spec i fic z one, the MZ must firs t cycl e back to the affected zone
before it ret urns t o norm al operat i on. At that ti m e the YELLOW LE D will turn off and any ex ternal al arm s
connect ed to t he m oni t or’ s alarm relays wil l also turn off. The RD wi l l ret urn t o norm al operat i on the nex t
ti m e i t polls the affected monitor.

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Multi-Z one Gas Monitor s

UP/D N KEY TOGGLES Z ONES

Z ONE S 1 - 8

4.5.7. Vi ew i ng Fault Log

A dat a l og of the last 20 fault conditions is ret ai ned i n m em ory. On the Fault S creen , s el ect the LOG opt i on
to view a di s pl ay of the fault log.

Figure 4-8. Fault Log S cre en

This s creen li sts potent i al fault condi t i ons in the left colum n and di splays a c heck m ark indic at i ng whi ch
problems wer e assoc i ated wit h each fault condi t i on as repres ent ed by t he vert i cal curs or bar. A s y ou m ove
the bar horizont al l y us i ng the LE F T/RIG HT curs or key s, the dat e and t im e the fault conditi on was detected i s
dis pl ayed in the upper right hand corner of the di splay window.

NOTE: Anyt i m e the fa ul t s tat us c hanges, there is an ent ry in the fault l og, bot h when t he
faul t occurs and when i t i s c l eared.

NOTE: Th e F aul t Log c an be reset by pres sing a combinat i on of t he E NTER and RIG HT
arrow butt ons w hi l e vi ewing the log.

4.5.8. Vi ew i ng Fl ow Log

On the F aul t Log s creen, pres s ENTER to ac ces s the Flow Log screen. The Flow Log displ ays the last 20
flow event s for all z ones and the purge port .

P/ N: 3015-5074 Rev 1 1 39

Figure 4-9. Flow Log Screen

Multi-Z one Gas Monitor s

This s creen li sts the zones in the left col um n and di splays flow data. Use t he UP /DOWN buttons to scroll
through the zones and the LE FT/RIGHT to s croll through the l og data. A s y ou m ove the bar ho rizont al l y,
the dat e and t i m e of the condi t i on i s displayed i n the upper right hand corner.

The Fl ow Log c an be reset by pres sing a com bi nat i on of t he ENTER an d RIGH T arr ow but tons whil e
viewi ng the log.

4.6. Th e Tren d Scr e en

4.6.1. Navigating to the Trend S cre en

From t he Zone Screen , select the Trend opt i on on the bot t om left si de. This wil l open t he Trend screen.
The t rend graph opens with t he curs or l ocat ed over the mos t rec ent data point. Us e the LEF T/RIGHT cursor

keys to m ove the c urs or to differ ent data points . Holdi ng a key down wil l caus e the c ursor t o m ove rapidly
across the sc reen. As y ou move the c ursor pos i tion, t he dat e and t i m e of that reading, along wi t h the P P M
value, are di splayed at the t op of t he s creen above the gra ph. Th e t rend graph i s aut om atical ly sc al ed t o
accom m odat e the largest PP M value di splayed. The ZOOM OUT a nd Z OOM IN opt ions al l ow y ou to adjust
the vert ical sc al e of t he graph.

st

The t rend data is st ored on a firs t-in, first-out basis. After 100 t rend values have been s tored t he 101
will replace t he first value st ored. The refore, in norm al operation, wh en entering trend mode the c ursor wil l
be loc ated at t he m ost recent data point. The data point s t o the left of t he i ni t i al c urs or l ocat i on will be the
next most recent. The data point t o the right wi l l be the oldest dat a poi nt in the buffer and wil l be over
written by the nex t dat a poi nt .

value

NOTE: Th e Tr end Data Log can be r es et by pressing a combinat i on of t he E NTER and
RIGHT arrow but tons whi l e vie wi ng t he l og.

W hen fini s hed, pres s t he ES C key to revert t o the previous s creen.

4.7. The Calibration Screen

4.7.1. Overview

The Calibration Screen i s used t o adj ust the cal i bration fact or for eac h gas. It i s also us ed to program the
instrument (Halogen only) for new gas es.

40 P/N: 3015-5074 Rev 11

Figure 4-10. Trend S creen

IMPORTANT: Changing info rm at ion on CAL F AC TO R will void the factory cali bration.

Typic al l y, t he uni t wil l rem ain wit hin the fac tory -c al i brat ed accurac y indefinit el y and no
calibration i s requi red. Complex software al gori thms adj ust fo r temperature drift , IR sourc e
aging, and press ure changes i n order to k eep the unit within fac tory acc uracy
specifications.

4.7.2. Navigating to the Cali bration Scre e n
On t he S ystem Set up sc reen, s el ect the Cali brat i on option (CAL).

Figure 4-11. Ca libration Screen (HGM a nd AGM Onl y)

Multi-Z one Gas Monitor s

4.7.3. Cal i bra tion P rocedure (HGM and AGM Only)

The C AL FACTOR i s det erm i ned by s am pl i ng a known dil ut i on of t he t ype of gas t o be sam pl ed. Calibration
is best perform ed at or near f ul l sc al e. It can, howe ver, be done at any concent rat i on, and ideal l y in the
range wher e max i m um acc uracy is desired down t o, but not bel ow, 100 PPM.

A cy l i nder of the desired gas at a cert i fied P PM level m ust be used t o ass ure sampl i ng occ urs at ambi ent
condi tions. A mi ni m um sampl e si z e of 5 liters is required.

The MZ monitor s houl d be operat i ng for at l east one hour prior to perfo rmi ng a cal i brat i on.
Prepare t he M Z for s am pl i ng by i niti ally set t i ng its CAL F A CTOR t o 1.000. Nex t, set up the MZ for a logging

int erval of zero minut es, and place t he M Z monitor in i ts zone hold m ode for the z one you wish t o use for
calibration purposes .

Connect the s ample bag di rect ly t o the intak e port for the zone you ha ve set up and all ow the MZ monitor t o
sam pl e the ent i re bag. When sam pli ng is compl et e, view the trend data for the z one used t o sam pl e. Read
the m easured PPM by pl aci ng the c urs or on the s pi kes cause by the sam pl e. If the bag was l arge enough
for mult ipl e sam pl es, average the mos t s table ones.

The new CAL f act or is com puted by dividing the known gas value by t he m easured value. Typi call y t hi s
value will be bet ween 0.95 and 1. 05. This value i s st ored i n non-volat i l e m em ory .

4.7.4. Adjusting Ca l ibration Fa ctor (HGM and AGM Only )

The fact ory defa ul t cal fac t or for s t andard uni ts is 1.000. Thi s value m ay be di ff erent i f t he hi gh acc uracy
opti on i s ordered.

Proc eed as foll ows to adjust the current cali brat i on factor:

1. Use t he PREV GA S or NEXT GAS options to sc rol l through t he l i st of gases until the gas you wish
to work wi t h i s displ ay ed.

2. Sel ect t he CA L F A CT OR option to edit t he value.

3. Use t he LEFT/RI G HT curs or key s t o m ove acros s t he entry fiel d and the UP/DOWN c ursor k eys
to m odi fy t he i ndividu al numbers .

4. Press ENTER to accept t he new entry or ESC t o revert to t he previous set ting.

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NOTE: The CO

c al i brat ion is a more com pl ex, 2-point c al i brat i on. CO2 units are fac tory

2

cal i brat ed and not i nt ended to be cali brated in the field. Ref er t o screens i n sec tion 4.7.5
for C O

c al i brat i on screen det ai l s.

2

4.7.5. CO

Becaus e CO
from a leak . The CAL sc reen of fers the abil i t y to manual l y ent er t he ambient CO

A tmospheric Concentra tion

2

is pres ent in am bi ent air, a relat i ve reading i s used t o det erm i ne the amount of CO2 coming

2

c oncent rat i on. This value

2

is typically in the range of 380 -400 ppm, howe ver c oncent rat i ons m ay vary sl i ght l y bas ed on geographi c
locations or ot her factors (the factory default setting is 386 ppm).

IMPORTANT: T he ambient CO
nee d t o be changed. If, how ever, the ambi ent CO
to be a value other t han this defa ul t value, t hen t he instrument’s ambi ent CO
nee d t o be changed.

level i s s et at the factory to 386 ppm a nd will likely not

2

concentration at your locat ion is k nown

2

s ett i ng m ay

2

If needed, adj ust the ambient CO

c oncent rat i on as foll ows :

2

1. From t he SY S TEM S ETUP menu, navigate t o the CAL screen.

2. Ensure t he GA S TYPE s ett i ng is select ed (see Fi gure 4-12) and pres s E NTER.

3. CO

c al i brat i on curve options are displ ayed. S i m pl y pres s E NTER to acc ess the ambient CO2

2

concent rat i on set ti ng (PPM IN PURGE). S ee F igure 4-12.

4. Use t he UP /DOWN c ursor k eys to modify t he num bers t o set to the appropriat e value.

5. Pres s E NTER t o acc ept the new entry or E SC to revert to the pre vio us s etting.

Figure 4-12. Accessing the CO

Atmo sphe ric Con ce ntration S e tting (PPM I N PU RG E)

2

IMPORTANT: Do not al ter any other par am eters wi thin the Calibr at i on M enu as this wil l

alter the factory cali bration.

4.7.6. Progra m m i ng Ne w Gase s (HGM On l y)

As new gases c om e i nto use the MZ monitor all ows t he addi tion of t hese new gas es to i t s on-board gas
library . A t t he end of the gas l i brary l i st is an opti on label ed CUS T OM for addi ng new gases . From t he
Cali bration Scree n use the LE FT/RIGH T arr ows to s el ect CUSTOM from the li st of gases. Next, press
ENTE R, and use t he UP / DOWN arrow k eys to ent er t he cal i brat i on factor. The sel ec tion of t he m atc hi ng
gas and CA L fac tor i s performed by B acharach by anal yz i ng the new gas . Onc e the matching gas is
determ i ned, fiel d cali bration i s pos si ble by using the s am e procedure as for other gases. When the new gas
entry i s compl ete simpl y set up t he appropri at e zone fo r CUSTOM.

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Multi-Z one Gas Monitor s

Program the inst rum ent for a ne w gas as follows:

1. From t he Calibration Screen, u se t he P RE V GA S or NE XT GAS options to scroll through the list o f
available choices unti l the CUSTOM opti on is di spl ay ed.

Figure 4-13. Custom Ga s Screen (HGM Onl y )

2. Sel ect t he CUSTOM option. Press ENTER to accept t he ne w ent ry or E S C t o revert to t he
pre vious s ett ing.

3. Ent er the new CAL F act or as rec eived from Bac harach.

4.8. Z one Hol d Mode

A zone c an be pl aced on hold and cont i nuously m oni t ored for a length of ti m e det erm i ned by t he Zone H old
Time value. To place a zone on hol d, select t he zone at t he m ai n run sc reen, then pres s and hol d down t he
ENTE R key until the uni t beeps . The word “HOLD ING” wil l appear in t he st at us box.

W hi le i n the hold m ode, further i nvesti gation of t he zone’s s tat us can be made by navigating t o that Zone’s
Setup Screen #1. To releas e t he zone from t he hol d m ode, pres s and hold down the E NTER key unt i l the
unit beeps and t he sc reen di splay ret urns t o norm al.

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4.9. Th e Diag nostic Scre en

4.9.1. Navigating to the Diagnostic Screen
On the System S etup screen, select the Diagnost i c opt i on (DIAG).

Figure 4-14. Diagno stic Screen

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Multi-Z one Gas Monitor s

output that was stored dur ing the last purge cycle and has the same

Optical absorbency comput ed from the Aver age Detector Voltage and

. There are t wo figures d isplayed. The f ir st ( annotated by a B ) is the ac tual

every purge cycle by closin g all sample valves.

4.9.2. Diagnostic Screen Overview

The Diagnostic Scre en cont ai ns sens or dat a and st atus informati on usef ul for troubl e shoot i ng various fault
conditions. An expl anation of t he i nformat i on provide d on eac h l i ne of t hi s s creen is listed below, including
normal operat i ng ranges.

Field Na m e Description

xxxx FEET P r ogr ammed length of tubing for an ac tiv e zone.

xx ZONE name

DET
AVE Av er age Detector Voltage – Runn ing average of the values displ ayed in line 1.

ZERO

NOISE

AVEAU

UM/L

PPM

ZERO

BENCH

BOX

PRES

VAC

AMB

FAULT Fault c ode liste d in hexadecimal. See F ault Code list.

y.yyyX Calibration multip lier used when measuring c oncentrat ion.

TCx.xxxx

MODBUS data

Current active zone and user-progr ammed name. This field may also sho w “ WARM UP ”
during war m up mo de.

Detec tor Voltage – Peak-to-pe ak output of the IR sensor. I n the absenc e of gas, this value
range is 4.100V to 4.300V.

Zer o Voltage – IR sensor
range as line 1.

A 16 point running av er age of the noise p or tion of I R bench output. This reading is valuable
mostly when gas is not present .

Average Absorbency –
Zer o Voltage. In the absenc e of selec ted gas, the absorbenc y is 0.000A U. When samp ling
de sired gas, it s value v ar ies propor tionally with the gas conc entration.

uMoles/L – Absolute co ncent rat ion in micro-m oles per liter of gas based on Noise a nd the
inter nal cali br ation
measure m ent at t he IR bench. The second is the calculat ed value corrected to ambie nt
condit ion s (temperature + pressure).

Parts Per Million i s the volume concent r ation r efere nc ed to standard t emperat ur e and
pressure and is computed from the Average Absorbency, Z er o Temperatur e and Ambient
Pressure. There are t wo figures displayed. The first (annotat ed by a B) is the act ual P P M at
the IR bench. The secon d is a PPM reading normalized to standard temperature a nd
pressure.

Zer o Temper ature – D isplays the sensor an d enc losure te mperat ure mea sure d and stor ed
during the last purge cyc le in degr ees C.

Bench Temperature – Current IR sen s or temperat ure in degr ees C as well as the ra w voltage
coming fro m the t emperature sen sor. This value can ra nge fro m a mb ient to ambi ent +15
degrees C.

Box Temperat ure – This i s the c ur r ent internal enclosure temper ature a long with the raw
voltage f r om the t emperature sen sor, and has the sa me range as the B ench t emperat ur e.

Pressure – T his is the curr ent ab solute manifold pres sure in PSI A along with the output
voltage of the pressure sensor. This value sho uld always be 0.2 to 1. 0 P S IA below a mb ient
(AMB).

Vacuum – The vacuu m pressure is me asured
Its v alue is typically 2.5 to 4. 0 P S IA below ambient pr essure.

Ambient – Ambient pre s sure is measured ever y purge cycle with the sa mpl e pump off and the
manifold open. I ts value is weather and a ltitude dependent and can r ange fro m 10.0 to

15.5 PSIA.

Temp er ature Compensation – magnitude of v oltage applied to sensor output (in volts).
Fac tory use only .

485 RX=x Receive port number of bytes FUNC Function
485 TX=x T r ans m it port number of bytes REG=xxxxx Register address

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46 P/N: 3015-5074 Rev 11

SECTION 5. MAINTENANCE

prevent dust and dirt from enter ing the monit or . B oth of t he filters

WARNING: Shoc k hazard! Al way s di s connect A C power b efore opening the enc l osure of
the monitor.

WARNING: The A C powe r ground wire mus t firs t be c onnect ed to the moni tor’s ground
stud. Under no c i rcumst ances s houl d this m oni t or be operated without a prot ective
gro und. Doi ng so pos es a pot enti al shock hazard, and i s a viol at i on of electrical saf ety
standards appl i cable to t hi s t ype of equipment.

WARNING: Elect ri cal inst al l ation shoul d be perf ormed by a cert ifie d el ect ri c i an, and m ust
com pl y with all appl i cable NE C/CEC and l ocal elec trical saf ety codes.

IMPORTANT: The MZ moni t or cont ai ns s ensi t ive elec tronic components that can be eas i l y
damaged. Do not touch nor dist urb any c om ponents. Do not di slodge elec trical wi ring o r
pne um at i c t ubi ng.

5.1. Replacement Parts Overview

Part Name P/N Description

The c har c oal filt er removes ref r igerant gas from the purge-air

Charcoal Filt er

(Halogen

Monitor Only)

3015-3125

stream dur ing the purg ing pr oces s. Replace the c har coal filter
(P/N 3015-3125) approximately every 6 months, when a zero
filter fault occurs (fault c ode < 0100>), or after the monitor ha s
been expose d to unusually high levels of refrigerant gas, suc h
as after an evacuation alarm.

Multi-Z one Gas Monitor s

The hydrophobic filter pr events water f r om entering the I R

Hydrophobic

Filter

0007-1650

detec tor. A zone flow fault will occur (fault code <080 0> ) if this
filter becomes b loc k ed. Replac e the hy dr ophobic f ilter as
required (P/N 0007-1650).

The gas sampl e line and o ptional exhaust line should be per iodical ly checked f or
obvious signs of kinks, damage and contamination. Replac e the tubing as required
(P/N 0304-2743 or 0304-2742 for Ammonia).

The gas-sam ple line filter and pur ge-line termination filter s

Air Line Tubing

Line End Filter

Assembly

0304-2743
0304-2742

3015-3420

should be peri odically chec k ed and r eplaced when ther e are
obvious signs of contamination.

• A z one flow fa ult will occur ( fault co de <0800>) if the gas-

Line End Filt er 3015-2906

sample line filter be c omes bloc ked

• A pur ge flow auto will oc c ur (fault code < 1000>) if the pur ge-
lin e filter becomes blocked.

Re m ove the filter from the line and replace it with a new o ne.
The end-of-line water stops prevent contamina nts a nd moistur e

End-of-Line

Water St op

3015-5512

fr om entering the mo nitor. T his filter sho uld be peri odically
check ed and replaced when ther e ar e obvious si gns of
contamination.

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Multi-Z one Gas Monitor s

allo wing it t o enter the internal compon ents of the M Z unit . The

. Loc ate the f use holders and carefully remove the f us es from the ir holders.

e pr ogrammin g ste ps. The MZ setu p m ust a lso be updated to

allo ws the oper ator to take advantage of

Part Name P/N Description

The water tr ap r emov es moi sture that enter s tubing before

Water Tr ap 0007-1655

Fuses 04-2620

Clock Battery 204-0020

Sample Pump 3015-5176

Intake

Manifold Kit

4–20 mA DC

Interface

Board

3015-5171

3015-5595 Stainless steel version of 3015-5171.

3015-5152

water trap should be emptied oft en as condensate
accumulat es. The wat er trap filter should be peri odically
check ed and replaced when ther e ar e obvious si gns of
contamination.

The MZ monitor is pr otected from electrical damage by two, 1A, 250 V, type “F”
fuses
Insp ec t and test t he fuse s w ith an ohm meter for cont inuity . Replace the fuse s a s
required.

The c loc k battery maintains the c or r ec t date and time when AC power is not
appl ied to the monitor. Replace thi s battery approximately every 5 y ear s. B attery
shelf life is 10 y ears.

The sa m ple pu mp draws the gas sampl e into the mon it or throug h the IR det ec tor
and di scharg es the sa mpl e via the exhaust por t. T o r eplace the pum p, remove the
inlet and outlet tubi ng, disconnect the A C power wires fr om the pu m p and r emove
the pump from the monitor. Install a new sample pu mp.

Up to thr ee additional intak e manif olds (4 zones each) can be installed in the MZ
monitor to incr ease th e total ca pacity to 16 zones. Each man ifold requires a 4-zone
lin e end filter k it ( 3015-341 1) . (Follo w the instructions provided t o install the
manifolds. Then fo llow the instruc t ions earlier in this manual to instal l the air lines
and comp lete the zon
recogn ize the ne w zones.)

The optional 4–20 mA DC Interfac e B oar d
the c ur r ent loop int er face s prov ided for connection of external device s to the M Z
monit or . The inter face bo ar d plugs into the sockets prov ided on the v alve/pump
drive PCB, and the ex ternal devices are then cabl ed to the MZ monitor as
de scribed earlier in this manual.

5.2. Replacement Parts and O pti on al A cces s ori es

Replacement Parts

Item De scription

Battery: Panasonic CR2032, 3V
Warning: In c omp liance with a genc y approv als & safety regulati ons, the battery mu st be

replaced with t he specified B ac har ach replac ement par t.

Filter: Char c oal, Z er o Air 3015-3125
Filter: Hydrophobic (I ntern al) 0007-1650
Filter: E nd of Line – As se mb ly (Termination/gas sampl e line) 3015-3420
Filter: End-of-Lin e (Filter Only ) 3015-2906
Filter: End-of-line water stop 3015-5512
Charcoal Filt er Mounting Bracket 3015-2969
Fuse: 1.0 A, 250 V, Type “F” 0004-2620
Repl ac ement P um p 3015-5176
Tubing: ¼ in OD (F or HGM and CO2; by the foot) 0304-2743
Tubing: ¼ in OD (For AGM; by the foot ) 0304-2742

48 P/N: 3015-5074 Rev 11

Part

Number

0204-0020

Multi-Z one Gas Monitor s

Item De scription

¼” to 6 mm Reducer Kit (10) 3015-5389 (10)
¼” to 6 mm Reducer Kit (8) 3015-5390 (8)
IR B enc h Replace m ent Kit (HGM) 3015-4572
IR B enc h Replace m ent Kit (AGM) 3015-4492
IR B enc h Replace m ent Kit (CO2) 3015-4562
Universal Power Supply 3015-5523
Main PC Board Replace m ent 3015-5483
Key Pad PC Board 3015-5521
Di spl ay PC Board 3015-5522
Power Entry PC Board 3015-5524
Solenoid V alve Manifold Driv e P C B oar d 3015-5542
5 Port S olenoid Block (for HGM and CO2: Zones 1-4 and purge port) 3015-5080
4 Port S olenoid Block (for HGM and CO2: Zones 1-4) 3015-5072
5 Port Stainless Steel Manifold (for A GM; Zones 1-4 and purge p ort) 3015-5081
4 Port Stainless Steel Manifold (for AGM: Zones 1-4) 3015-5073

Part

Number

Opti on al Accessor i es

Item De scription

Interfac e B oar d, 4-20 mA 3015-5152
Variable Flow Regulator 3015-3849
Four Zone Expansion Kit (must or der filters [3015-3411] in con junc tion with kit) 3015-5171
Four Zone End-of-Line Filt ers Kit 3015-3411
Splitter Kit (2-way) 3015-5404
Splitter Kit (3-way) 3015-5405
Re mote Loop Pow er ed Display Assembly 3015-4992
Manifold Replacem ent Fit tings 3015-5753

Surge Protectors

120 V 3015-4121
230 V 3015-5530
4-20 mA 3015-4123
Alarms
Audible/Visual 12 0 V AC 3015-3076
Audio-V isua l Alarm, 18-28 VDC, Sur f ac e M ount 3015-5490
Audio-V isua l Alarm, 18-28 VDC, Panel Mount 3015-5491
Audio A lar m, 18-28 VDC, Surface M ount 3015-5492
Audio A lar m, 18-28 VDC, Panel Mount 3015-5493
A nnual M ai ntenance Kits
4 Zone (5 line end filters, 1 charcoal filter, 1 hydr ophobic, 3 end-of-line water sto p filters) 3015-5525
8 Zone (9 line end filters, 1 charcoal filter, 1 hydrophobic, 3 end-of-l ine water sto p filters) 3015-5526

Part

Number

P/ N: 3015-5074 Rev 1 1 49

Multi-Z one Gas Monitor s

Item De scription

12 Zone (13 line end filt ers, 1 charc oal filt er , 1 hydr ophobic, 3 end-of-line water sto p filters) 3015-5527
16 Zone (17 line end filt ers, 1 charc oal filt er 1 hydr ophobic 3 end-of-line water stop filters) 3015-5528

Gases

R-22 Ga s Cylinder, 100 PPM 3015-3850
R-134a Gas Cy linder, 100 PPM 3015-3851
R-123 Gas Cy linder, 100 PPM 3015-3852
R-22 Gas V er ification K it 3015-3430
R-134a Gas V er ification Kit 3015-3437
R-123 Gas V er ification K it 3015-3438

Water Traps

Manual Drai n W ater Tr ap 0007-1655
Manual Drai n W ater Tr ap Replacement Filter 0007-1656
Manual Drai n W ater Tr ap Mounting Bracket 0007-1657

Communications Kits

N2 JCI Metasys Co m mun ic ations Kit 3015-4230
LonWor ks Com m unication s Kit 3015-4231
BACnet Com munic ations Kit 3015-5606

Part

Number

5.3. Troubleshooting

Certain critical faults may be c orrect ed by checking and adjust i ng the det ect or voltage and/ or em i t ter powe r.
Thes e fault s i nclude:

• CLIPPI NG F AULT <8000>

• REZE R O VOLT TOL <4000>

• OVER RANGE DETE C TED <2000>

• GAIN SET FAULT <0200>

To t roubleshoot any of the abo ve f aul t s, us e t he procedure l i st ed bel ow.

1. W ith t he monit or i n ei ther W arm Up M ode ( flashin g g reen LED) or S ampli ng M ode (s olid green
LED), ac cess the S et up M enu by press i ng the EN TER k ey t wi c e.

2. Scroll t o the bot tom ri ght of the sc reen to s el ect the “Ser vice M ode E ntry ” option.

3. W i t h the “S ervice Mode Ent ry” option hi ghl i ghted, press EN TER t wi ce t o enter Service Mode.

4. Scroll t o the “S Y STEM” opt ion and pres s E NTER.

5. Scroll t o the “MORE” opt i on and press EN TER. Note t hat “MORE ” wi l l flas h when i t is select ed.

6. Scroll t o and sel ect t he “IR DIGIPOT” opti on (see bel ow) and pres s E NTER.

7. Use t he UP and DOWN arro ws t o adjus t the M W reading to 450 (or as c l ose as possibl e). When
at t he proper val ue, press ES C onc e.

50 P/N: 3015-5074 Rev 11

Multi-Z one Gas Monitor s

DIGIPOT= 180

V = 4.7 MA = 96

IR VOL T= 4.21

R= 49 MW = 450

Figure 5-1. Sam ple DIGIP OT Readings

8. Scroll t o “D ET DIGIP OT ” option (see above) and pres s E NTER.

9. Use t he UP a nd DOW N ar rows to adjus t t he IR V OLT re adi ng to 4.20 (or as clos e as poss i bl e).
W hen at the proper value, pres s E S C once.

IMPORT ANT! If IR VOLT does not r each 4.20 0 ±0.100 volts when adj usting the
DIGIPOT, r et urn to s tep 6 t o low er the IR em i t ter s ett i ng. If the I R em itt er set ting i s
450 ±2 0 mW , adjus t the ne w IR emitt er set ting to 375 ±20 m W. Repeat st ep 8 with
the new I R em i t ter s ett i ng.

10. Press ES C t o save.

11. Press ES C t o get t o the S ys tem M enu. S crol l to S ervice M ode and press E NTER twic e t o leave
Service Mod e. Press ESC once an d allow th e instrument to com plete a pressure check and
pur ge c ycle (approximat el y 2 m i nutes ).

If the faults cannot be cl eared us i ng the above procedure, call the factory for further as sist ance.

P/ N: 3015-5074 Rev 1 1 51

Multi-Z one Gas Monitor s

52 P/N: 3015-5074 Rev 11

Multi-Z one Gas Monitor s

APPENDIX A. RECOMMENDED REFRIGE RANT GAS ALARM
SETTINGS

Gas

CO2/R-744 1500 2000 3000 R245FA 100 300 500
FA188 100 300 500 R401A 100 300 500
FC72 100 300 500 R402A 100 300 500
H1301 100 300 500
H1211 100 300 500 R404A 100 300 500
H2402 100 300 500 R407A 100 300 500
H1234YF 100 300 500 R408A 100 300 500
HFP 100 300 500
N1230 100 300 500 R409A 100 300 500
NH3/R-717 50 150 300 R410A 100 300 500

Alarm Settings (PPM)

Leak Spill Evacuate Leak Spill Evacuate

Gas

R402B 100 300 500

R407C 100 300 500

Alarm Settings (PPM)

R11 100 300 500 R422A 100 300 500
R12 100 300 500 R422D 100 300 500
R21 100 300 500 R424A 100 300 500
R22 100 300 500 R426A 100 300 500
R23 100 300 500
R32 100 300 500 R438A 100 300 500
R113 100 300 500 R500 100 300 500
R114 100 300 500 R502 100 300 500
R123 25 35 50 R503 100 300 500
R124 100 300 500
R125 100 300 500 R508B 100 300 500
R134A 100 300 500 R-717/NH3 50 150 300
R227 100 300 500 R-744/CO2 1500 2000 3000
R236FA 100 300 500

R427A 100 300 500

R507 100 300 500

P/ N: 3015-5074 Rev 1 1 53

Multi-Z one Gas Monitor s

54 P/N: 3015-5074 Rev 11

Multi-Z one Gas Monitor s

APPENDIX B. RS -485 COM MUNICATIONS PROTOCOL

B.1. Overview

The following i nst ruct i ons are intended as a gui de for int egrating the MZ network int o a Buil di ng
Management S ys tem. If you are unfam il i ar wi t h com pl ex sys tems of thi s type, it is rec om m ended that you
contac t Bacharach for technical assist ance.

B.2. MODBUS RTU Protocol

The MZ monitor c om m uni cat es with mast er devices (suc h as the Remote Display or a Bui l di ng
Management S ys tem ) over the RS-485 serial i nt erfac e. B ecause t he m oni tor is c onfigured with a t wo wire
RS-485 serial bus, data t ransmi ssion occ urs in “half-duplex” mode. Therefore, onl y one device may be in
trans m i t m ode at any given t i m e.

This doc um ent s pecifies t he M O DB US comm uni cat i ons prot ocol as i m plement ed on t he appl i cable
instruments. Program mers shoul d ref er to t he M ODBUS Prot ocol Refer ence Gui de for detail s and more
com prehensive instruc tions. The guide is avail able at
soft ware is avail abl e at :

http://www.MyBacharach.com/downloads.htm

B.3. MZ MODBUS RTU Operation

www.modbus.org. Specific communications

B.3.1. Overview

The MZ and RD are equi pped to c om m uni cat e wi th ot her equipm ent us i ng the M ODB US RTU protocol.
Usi ng t hi s communications channel a M ODB US m ast er device m ay c om m uni cat e with up t o 15 MZ
monitors on a communicat i ons net work , exc hangi ng m easurement information, alarm data, fault data,
his tory (logs and trends ) and s etup i nformat i on. A ddi tional l y, the M O DB US m as ter can c ont rol t he operating
stat e of an MZ monitor, pl ac i ng the MZ in any of its different operat i ng m odes. The network m ay be
configured so t hat t he MZ monitors are connec ted direct l y t o the MODB US m ast er device, or the MO DB US
mas ter device may c om m uni cat e wi t h the MZs through t he RD.

NOTE: Thi s document was writt en wi th t he ass um ption that the reader is fami liar wit h the
vari ous s etup parameters and operati onal m odes f or t he Multi-Zone.

B.3.2. Protocol Details

A 2 wire RS-485 bus i s used for trans m i ss i on, t herefor e communications occurs in a Half-Dupl ex m ode.
The MZ is a slave device and wil l res pond to queries in the M ODB US RTU form at fr om a m ast er device.

Two MODB US f unct i ons are supported. They are func tion 03 (read hol di ng regi st er) and f unct i on 16
(Pres et Mul tipl e regi st ers ). Please refer to the MODB US P rot ocol Referenc e Gui de (avail abl e at
www. m odi con. com / tec hpubs/ tec hPubNew/PI_MB US _300. pdf) for protocol detail and use i ns tructions.

Usi ng t he two MODB US func tions, a m ast er device m ay read, m odi fy and wri t e data and s tat us information
to any moni tor on the net work . Data is organi zed into struct ures (int ernal to t he MZ monitor) whic h can be
acces sed by t he M ODB US regi st ers defined in this doc um ent. A c orres pondi ng set of dat a s truc tures
shoul d be m ai ntained by t he m ast er device. These master de vice data s truc t ures become the des tination
for respo nses t o read queries and s ources for preset regi st er comm ands. When a read holdi ng regi st er
query i s made by t he m ast er device t he MZ monitor responds by sending the c ontent s of the st ruct ure
referenc ed by t he specified regi st er. A ft er t he m ast er valid at es the MZ respons e using the CRC bytes , it
mus t t hen m ove the data i nt o i ts matc hi ng dat a st ruct ure before individual items m ay be accessed or
modified. Th erefor e, t he m ast er dat a st ruct ure should corres pond to t he MZ data st ruc ture by te for byte.
Note t hat s om e data struct ures have been divided i nt o m ul tipl e regi st ers due t o M ODB US RTU message
lengt h cons trains. To change a s ett i ng i n the MZ monitor, the mast er device firs t reads the regist er st ruc ture
that cont ai ns t he data item to be m odi fied, m akes the des i red change, then s ends t he st ruct ure back using

P/ N: 3015-5074 Rev 1 1 55

Multi-Z one Gas Monitor s

MODB US Mo de

RTU only

MZ Baud Rate

Default is 19,200. Pr ogr ammable as defi ned in system dat a r egister.

the pres et m ul t i pl e regi s ter function. If the trans act i on i s s ucc essful, t he MZ monitor sends t he appropriate
MODB US res ponse. It i s the responsi bi li ty of t he m ast er device, when making m odi ficat i ons, t o i ns ure that
all param et ers transferred are wi t hi n the working l i m i t s of the MZ.

IMPORTANT: E ach t i m e param eters are m odifie d and sent bac k t o the moni tor us i ng
funct i on 16 (pres et m ul t i pl e regi st ers ), t he new values are writt en t o the m oni t or's non­volati le FLA S H m em ory. Due t o the finit e write li fe of the F LA SH mem ory device (10K ­100K write c yc l es), m odi fy i ng and writing variabl es s houl d be performed o n an “as needed”
basi s and not periodic al l y. Ex ceedi ng t he FLASH wri t e l i fe c an result in m em ory
corrupt i on, requiri ng a CPU bo ard repl ac eme nt.

B.3.3. MZ Monitor Polling

After the MZ monitors are set up and operat i ng, t he m ast er device need onl y pol l each m oni t or for its statu s
regis t er whi c h contains s um m ary dat a of t he m oni tors’ alarms, fault s, and operat i ng st ate. If exc eptions are
detect ed t hrough the s tat us regist er and m ore det ai l s are required, addi tional regi st ers c an be exam ined.
Al s o i f c urrent PP M values are required, t he P PM regi st er provides ac cess to current P P M values for all
zones. The MZ monitor req ui res a m i ni m um of 20 s econds to c om pl ete a gas c oncent rat i on m easurement
for a singl e zone. Therefo re, it is not necess ary to poll the MZ monitor m ore freq uent l y t han once every 15­20 seconds , as t here wil l not be any new dat a avail abl e/ obtained by m ore freq uent poll i ng. In fa ct ,
exces si ve polling wil l s l ow t he operation of t he MZ. Under no c i rcumst ances s houl d t he MZ monitor be
continuousl y pol l ed at rat e fas t er than 500 ms, as this c oul d res ul t in erroneous readings by the MZ monitor.

B.3.4. Network Topologies

MZ monitors m ay be c onnected direct l y t o the MODB US network or they may be c onnect ed to the network
through a Remote Display. In eit her cas e, eac h MZ monitor m ust have a uniqu e node ID. Up to 15 MZ
monitors can be c onnect ed di rect l y t o the MODB US network .

If MZ monitors are ac ces sed via an RD connect ed t o a MODBUS network , t he RD “BM S enabl ed”
paramet er m us t be s et equal to “1” vi a the “R DM S ETUP ” sc reen on the Remote Display. The same
com m ands and regist ers are us ed to c om m uni cat e wi t h the MZ directly or t hrough the RD. If the
com m uni cat i ons are through t he RD, i t m onitors each M ODB US m ess age to determine i f t he m ess age i s
int ended f or one of the MZ monitors i t is connec ted t o. If it i s, th e RD pas s es the mess age through t o t he
MZ monitors. If it is not, t he m ess age i s not pas s ed through. The RD does not m ake any m odi ficat i ons to
MODB US m ess ages. It sim ply pass es t he query t hrough t o the MZ monitor, and pass es the response back
to t he M O DB US m ast er. In other words , i t al l ows the MZ monitors to be l ogical l y c onnect ed t o the
MODB US net work, when phy si c al l y t hey are c onnect ed to t he l ocal RD network.

IMPORTANT: It is very i m port ant to unders tand t hat t he RD wil l onl y pas s m ess ages
through t o the MZ moni tor wh en the RD is either in the “SYSTEM” s creen or t he “ZO NE
VIEW” sc reen. I f the RD i s in any ot her sc reen
response (ex cept i on code 06).

, i t wi l l ret urn a M ODBUS “busy ” exc epti on

All RD screens, ex cept the SYS TEM and ZONE V IE W sc reens, ha ve a 10 minut e t i m eout interval. After
this, t he sc reen wi l l return t o t he SY S TEM or ZONE V IEW sc reen, depending on whi ch one w as l ast
displayed. The RD may al so be pass word protected so that a password ent ry is requi red in order t o view
screens other t han t he SY S TEM or ZONE V IEW sc reen.

B.3.5. Key Comm Proto col Parameters

Parameter Description

Parity No Parity

56 P/N: 3015-5074 Rev 11

Parameter Description

Stop Bits

Default is 1. Can be set for 2 via S yste m d ata re gist er .

Error Checking

CRC per MODB US sp ec ification s

System Data

0x0010

16

R/W System Set up Data

Zone Data

0x12xx

4609-4630

R/W Setup data for up to 16 z ones (xx defines z one number)

Date/Time

0x0015

21

R/W Set MZ date & time

Sensor Data

0x0016

22

R Raw m eas ure ment of sen sor s

Rel. Hold

0x0017

23

W Release M Z out of hold mode

Hold Zone

0x0018

24

W Put MZ into hold mode

Fault Log

0x19xx

6400-6401

R 20 m ost recent fault events (xx = 00 or 01)

Flow Log

0x001F

31

R 20 m ost recent flow f ault events

Alarm Log

0x1Axx

6656-6658

R 20 m ost recent alar m events (xx = 00, 01, or 02)

Ser v. Mod e

0x001B

27

W Puts M Z into service mode

Rel Serv.

0x001C

28

W Release M Z f rom serv ice mode

PPM

0x001E

30

R P P M values for all zones

C

Character

Float

Floating Point

I

Integer

TIM

Time

UI

Un s igned Integer

Multi-Z one Gas Monitor s

Maximum Response Time

4000 ms when directly accessing the M Z monitor .
8,000 ms whe n ac c essing t he MZ monitor t hr ough the RD.

NOTE: All data sent out fr om the MZ is i n “l i t tl e endian ” by te order (Leas t s i gni ficant byt e
follow ed by m ost signi ficant byt e). This shoul d be t aken i nt o account i f t he m as ter t hat
process the dat a i s a “big endi an” ty pe. No n-data information (st arting address, num ber of
point s, et c. ) foll ows normal M ODBUS protoc ol , w hi ch i s B ig Endian.

B.3.6. Summ ary of Registers

Register

N ame Numb er

Status 0x0011 17 R/W Operating su m mar y of f ault s, alarms and stat us

CAL Data 0x0014 20 R/W Cal Fa ct or s for all ga se s

HEX Decimal Description

Zone Log 0x3yxx 0-6

Trend data for eac h MZ zone [y = z one # (starting at 0), xx = 00 – 06]
Data

Data Type Abbreviations

P/ N: 3015-5074 Rev 1 1 57

Multi-Z one Gas Monitor s

Type

UI

2 bytes

Indicates EEPROM has be en initialized if value = 300 DO NOT MODI FY

REV

Float

4 bytes

Firmwar e Rev Lev el DO NOT MODIFY

UNUSED

UI

2 bytes

Fir mware Serial N umber DO NOT MODIFY

Location

C

13 bytes

Array defining text name of unit

Alarm_Ack_

Define s Alarm Operat ion. Manual Ackn owledge = 0; A uto A c k nowle dge
Hold_Time

UI

2 byte

Len gth of zone hold int er val in minutes (DEFA ULT = 15 m inutes)

Concentrations le s s than or equal this

Loop2_factor

Float

4 bytes

Define s PPM current lo op output. (DEF AULT = 0. 16 mA/PPM)

Mode

UI

2 bytes

UNUSED

B.3.7. System Data Register 0x0010 (16 De c) (R/ W, 54 Bytes)

Variable Type Length Description

Node UC 1 byte

Stop_Bits C 1 by te

Network S lav e Node # (valid values are 1-15). The default is that
ind ic ated by the Node DIP S witch o n main boar d.

Number of stop bits used in the MZ data str eam. Default = 1. Other
available v alue is 2

Sounds i nternal board buz zer on con ditio n; 0 = no buzz er; 1= Alarm;

Aud_Alarm UC 1 byt e

2=Fault; 3=L eak ; 4= S pill; 5= E vacuate; 6=Monitor Of f line ( DE FA ULT =

0)

Mode
Num_Zones UC 1 byte

UC 1 by te

= 1 (DEFAULT = 0)
Nu m ber of install zones (V al ue init ia liz ed dur ing aut o detec t dur in g

Power On Self Test).

UNUSED TIM 13 bytes UNUSED
Rezero_Mode UC 1 by te

UNUSED UC 1 byt e

Avg_Size UC 1 byt e

Define s re-zer o mode. Auto Re-z er o = 0; Re-z er o every zone = 1
(DEFAULT = 0)

Minimum detect io n limit (in P PM).
value will rea d as 0 PP M (DEFAULT = 0 PPM)

Size of r unning avera ge use d in computing P P M value. DO NOT
MODIFY.

Serv_Mode_TO UI 2 byt es Service M ode Ti m eout v alue (in minute s). (DEFA ULT = 60 MI NUTES)

BAUD RATE for RS-485 connec tio n ( between RD and MZ monitor or

RS485_BAUD UI 2 byt es

M O DBUS mast er a nd MZ depending on the N etwork topology).
Default= 9 (19. 2K ) ; othe r values are 8=9600, 7= 4800

B.3.8. Status Register 0x011 (17 Dec) (R/W, 10 Bytes)

Variable Type Length Description

Defines Operating Mode of MZ. 0 = normal Mode; 1 = Z one_Hold Mode; 2

Mode UC 1 byt e

= Diagnostic Mode; 3 = Serv ic e mode. DO NOT MODIFY (use zone hold

register or service mode register to ch ange this p aramet er)

State UC 1 byte

Measuring UC 1 by t e

Defines MZ Current State. 0 = Idle; 1 = Sampling; 2 = Zeroing; 3 = War m
Up, 4 = P r es sure Check DO NOT MODIFY

Value = 1 if unit is acq uir ing detector signal f or r unning avg. DO NOT

MODIFY

Active_Zone UC 1 by te Current Zone being chec k ed. 0=zone 1, 1=zone 2, etc.
Max _ Alarm UC 1 byte Indicates hi ghest non-acknowledged alarm level DO NOT MODIFY
Alarm_Count UC 1 by te Number of alar m s that are c ur rently ac tiv e. DO NOT MODIFY
UNUSED UC 1 byte UNUSED
Loop_Card UC 1 byt e Value = 1 if 4-20 mA c ar d has been detec ted. DO NOT MODIFY

Fault UI 2 bytes

Fault Flag S t r uc ture u se s bitwise acce s s to 16 bit wor d as defin ed in the
table below.

58 P/N: 3015-5074 Rev 11

Multi-Z one Gas Monitor s

15

CLIPPING FAULT

0x8000

0x8000 Sensor outp ut v oltage too high

14

ZE RO RA NGE FA ULT

0x4000

Sensor output voltage outsi de limits during purge

13

OVER R ANGE FAULT

0x2000

Gas concentr ation above measura ble r ange

12

PURG E FLOW FAULT

0x1000

No flow detected duri ng pur ge cycle

11

ZONE FLOW FAULT

0x0800

No flow detected duri ng sample c ycle

10

A2D FAULT

0x0400

Analog to digit al converter not working

9

GAIN SET FA ULT

0x0200

Digi pot gain setting out of nor mal range

8

ZERO FILTER FAUL T

0x0100

Charcoal filt er (if used) needs replacem ent

7

CONFIG FAULT

0x0080

No zones are enabled

6

UNUSED FA ULT 2

0x0040

5 UNUSED FA ULT 1

0x0020

3

RS485 F AULT

0x0008

Communications error

2

MANIFO LD P FAULT

0x0004

Pres s ur e sensor r eadings ar e out of range

1

BENCH T FAULT

0x0002

Sensor temperature i s out of range

0

BOX T FAULT

0x0001

Cha s si s temperat ur e is out of range

Location

C

13 bytes

13 byte arr ay, A lpha Numeric Description or Name of Zone

Distance

UI

2 bytes

Zone Tubing Length (in feet) ( DE FA ULT = 100 feet [approx. 30.5 meters])

Zone Temp

I

2 bytes

Average temperature at zone (degre es C) (DEF AULT = 25°C)

Concentration

Float

4 bytes

La st Measure d c onc entrations (uM/L) DO N OT MODIFY

Concentration2

Float

4 bytes

La st Measure d c onc entration (PPM) DO N OT MOD IFY

Set value to 1 to ac k nowledge Alarm.

Alarm

UC

1 bytes

Alarm Stat us; 0 = no alarm, 1 = leak ; 2 = spill; 3 = evac.

Leak Level

UI

2 bytes

Level to t r igger a leak alarm (in PPM) (DEFAULT = 100)

Spill Level

UI

2 bytes

Level to t r igger a s pill alarm (i n PPM) (DEFAULT = 300)

Evac Level

UI

2 bytes

Level to t r igger a evacuate alarm (in PPM) (DEFA ULT = 500)

Peak PPM

UI

2 bytes

High est Recorded PPM in zone

Peak Time

TIM

13 bytes

Date an time of highest peak (see note 2 for format)

A larm Time

TIM

13 bytes

Date and time of last alarm (see note 2 for format )

A larm A ck/ T ime

13 bytes

Log Interval

UI

2 bytes

Nu mber of minutes betwe en Log entrie s (DEFA ULT = 1440)

B.3.9. Fault Code Ta ble

BIT Fau lt Type Code Description

4 LOOP FAULT 0x0010 Current loop is op en

B.3.10. Zone Data Reg ister 0x12xx (R/ W, 78 Bytes)

Each z one for an MZ has a s eparat e zone dat a st ruct ure t hat is 78 by tes long. The zone num ber is the low
order byt e i n the regist er addres s (i. e. , Zone 1 data regist er = 0x1201h).

Variable Type Length Description

Flow OK UC 1 byte
Refrigerant

Type

UC 1 byte See note 1 B elow (DEF AULT = R134a)

St atus of F low c hec k . Value of 1 indicat es flo w c hec k is good. DO NO T

MODIFY.

NOTE: M Z will reset this byte to 0 when t he Alarm by te

Alarm Ack UC 1 by tes

(below) i s = 0 and zone in alar m is sa m pled. I f the alarm
condition/ byte increases (leak>>spill or spill> > evac) the MZ
will a lso reset t his byte to 0.

P/ N: 3015-5074 Rev 1 1 59

Multi-Z one Gas Monitor s

NOTE: Refe r to t he Rec ommende d A l arm S ett i ngs & Gas E num eration tabl e on page 53.

NOTE: Time St ruct ure Format cons i st s of 13 unsi gned charact er t ypes. They are 1

second digit , 10 second digi t, 1 m i nute digi t , 10 m inute digit , 1 hour digi t, 10 hour digit , 1
day di gi t , 10 day digi t, 1 m ont h di gi t, 10 mont h digit , 1 year digi t, 10 year digi t, l ast byt e i s
unused.

B.3.11. Alarms and Alarm Acknowledge

The Multi-Zone can be operat ed i n t wo di fferent alarm ac knowledge m odes, A uto and M anual (s et via the
alarm_ack _m ode variable in the s ys tem data regist er). F or purpos es of thi s discussi on, t he term “A l arm ”
refers to an MZ st ate where the al arm l i ght i s on and t he appropri at e al arm rel ay is ac tivated. The t erm
“Alarm conditi on” ref ers to t he ext ernal condition (i . e., refrigerant leak) that ini tial ly c auses t he MZ monitor to
go int o an al arm. If an alarm occurs i t c an be handled i n one of 3 way s.

1. Non-Latching Mode. This m ode i s enabl ed by s ett i ng the A UTO_ACK_MODE param eter in t he
sys tem regist er to “1”. In thi s m ode, if an al arm condition occ urs an MZ alarm wi l l be c reated. I f t he
alarm condition i s subs equentl y rem oved, t he MZ al arm wil l automatical l y be c l eared by t he MZ
monitor when the z one i n alarm i s sam pl ed “clear”. Not e, in this m ode of operat ion, i t i s poss i bl e for
an alarm to oc cur and be c l eared wi t hout user or MODBUS m ast er i nterventi on. If th is is th e case,
the onl y evidence of the al arm would be contained i n the MZ ala rm log.

2. Latching Mode wi th Silence . This m ode i s enabl ed by s ett i ng t he AU T O_ACK _M ODE i n the
sys tem regist er to “0”. In thi s m ode, if an al arm condition occ urs, an MZ alarm wil l be creat ed. In
ord er for the al arm t o be rem oved the MODBUS m as ter wil l write a “0” t o t he ALARM parameter in
the Z ONE regi st er. This wil l caus e the alarm t o be “s i l enced” i n t he MZ monitor (i . e., t he al arm r elays
will ret urn t o their no rmal st ate and t he ALA RM lam p will be ex ti ngui s hed). The next tim e the z one
with the alarm c ondi tion i s s am pl ed, if t he al arm condition st i l l exi s ts , t he al arm wil l be react ivated and
the al arm parameter wil l be reset to “1” in the MZ. O t herwi se, i f the al arm condi t i on has cleared, no
furt her act i on i s required and norm al operation wi l l resume.

3. Latching Mode wi thout Silence. Thi s m ode i s enabled by set ting the A UTO _A CK_MODE i n the
sys tem regist er to “0”. In thi s mode, if an alarm condition occurs , an MZ alarm wil l be creat ed. The
MZ MODBUS mast er wi l l then write a “1” to t he A LARM ACK paramet er in the z one regi st er. The
alarm wi ll cont i nue to pers i st s (i.e. , Relays i n al arm stat e and Alarm l i ght on) until the of fending zone
is sampl ed and no alarm condi t i on i s det ect ed. At t hat point, the A LA RM A CK paramet er is
autom at i cal l y cl eared by t he MZ monitor, as i s t he A LARM param et er.

NOTE: If the A LARM A CK par am et er i s s et t o “1” an d the A LA RM CONDI TION is
upg raded (f rom l eak to spil l , or s pi l l to evac uate) t he A LARM A CK para m et er wi l l
autom at i cal l y be cl eared t o “0” by t he MZ.

B.3.12. Date Time Register 0x00 15 (21 Dec) (R/W, 14 Bytes)

Variable Type Length Description

Date_Time Time 14 bytes

Contain s current time an d date. Str uc ture is defined as in not e 2 of
zone data

Time St ruct ure F ormat cons i sts of 14 uns i gned charac ter t y pes. They are 1 sec ond di gi t, 10 sec ond di gi t, 1
minute digi t, 10 m i nut e di gi t, 1 hour di git, 10 hour digit, a day digit, 10 day digi t , 1 month digi t, 10 mont h di gi t ,
1 year di gi t , 10 year digit, day of the week, las t by t e is unused.

60 P/N: 3015-5074 Rev 11

B.3.13. Sensor Data Register 0x0016h (22 Dec) (R, 82 Bytes)

Pressure

Float

4

M anifold Pressure is PSIA

P_Volts

Float

4

Pres s ur e sensor output Voltage

Vacuum_P

Float

4

Pres s ur e with all value closed and pump on in P S IA

Ambient_P

Float

4

Absolute Ambient P r essur e in P S IA

Box_T

Float

4

Enclosure Temperature in Degr ees C

Box_T_Volts

Float

4

Box temp sensor output v oltage

Bench_T

Float

4

Optical bench temper atur e in Degrees C

Bench_T_Volts

Float

4

Bench temp sen sor output voltage

Bench_Z_T

Float

4

Optical bench temp in degrees C at last zero inter val

Box_Z_T

Float

4

Box temp in degr ees C at la st zeroing

PkPk_int

UI

2

Current peak to peak A /D counts fr om d etector

PkPk

Float

4

Current peak to peak v oltage from d etector

Ave_PkPk

Float

4

Runn ing average voltage fr om detec tor

Zero_PkPk

Float

4

Voltage measured at last zeroing

AU

Float

4

Current abs or bance value

STP_PPM

Float

4

PPM corrected to STP (1 atm, 25 deg C)

Bench_UML

Float

4

Micromoles/liter in bench (uncorrected)

Rel_Hold

* * See description of STATUS REGISTER

Zone_Hold

* * See description of STATUS REGISTER

Variable Type Length Description

Noise Float 4 Largest Change in running av er age

Ave_AU Float 4 Running Average of absorbance level
Bench_PPM Float 4

PPM in bench ba sed o n zone gas se lec t ion (uncorrected for
pressure and temper ature)

Multi-Z one Gas Monitor s

Ambient_UML Float 4 Micromol es/liter c or r ec ted to ambie nt pressur e

B.3.14. Release Zone Hold Register 0x0017h (23 Dec) (W, 10 Bytes)

Variable Type Length Description

B.3.15. Hold Zone Re gister 0x 0018h (23 Dec) (W, 10 Bytes)

Variable Type Length Description

B.3.16. MZ Hold Mode

The MZ monitor can be m ade t o hol d or “dwell ” on a part i cul ar z one i f nec ess ary. The length of t he hol d
ti m e i s defined by t he HOLD TIME param et er i n t he Sy st em Data Regist er.

Placing the MZ Monitor into hold mode:

1. Read the MZ S tat us Re gi st er (0x0011h)

2. Modify the c ontent of t he st atus regi st er s truc ture t o change t he M ODE parameter t o zone hold

mode. Ac tive zon e paramet er t o the z one you wish t o hol d

3. Send t hi s updat ed stat us regist er st ruct ure bac k to t he MZ using PRESE T MULTIPLE REGISTER

COMMAND t o the HOLD ZONE REGISTER (0x00 18 h).

Relea sing the Zone Hold

1. Read the MZ monitor Status Regist er (0x0011h)

P/ N: 3015-5074 Rev 1 1 61

Multi-Z one Gas Monitor s

Ptr

UC

1 byte

Pointer to most recent event

Unused

UC

1 byte

Unused

20 most rec ent flow f ault events. Eac h bit of the unsigned int repr esent s a
Ptr

UC

1 byte

Point er to mo st r ec ent ev ent

Unused

UC

1 byte

Unused

Ptr

UC

1 byte

Point er to mo st rec ent ev ent

Unused

UC

1 byte

Unused

2. Modify the c ontent of t he st atus regi st er t o change t he M ODE parameter t o normal m ode. Active

zone parameter to t he zone which you would l i ke t o res um e nor m al ac tivity on

3. Send t hi s updat ed stat us regist er st ruct ure bac k to t he MZ using PRESET MULTIPLE REGIS TER

COMMAND to the RE LE A SE HOLD RE GISTER (0x0017h).

B.3.17. Fault Log Register 0x1900-01 (6400-6401 Dec) ( R, 302 Byte s)

Thes e registers cont ai n t he 20 m ost recent fault events , the t i m e they occ urred, and a poi nter t o t he m ost
recent event . The data i s s pl i t int o 2 regi st ers. The first regist er cont ai ns 200 by tes and the second regist er
contains 102 byt es. The result s of these two regis ter reads should be recombi ned i nto t he F ault Log Data
St ruct ure after both have been rec eived.

Variable Type Length Description

Fault UI 40 bytes

Time TIM 260 byt es

20 most rec ent fault events. Each event is decoded as indicated in F ault
Flag S truct ure given aft er the Stat us Reg ister Description

Time of each fault occurrence. TIM v alue as defined in NOTE 2 of Zone
Data

B.3.18. Flow Log Re gi ster 0x001F (31 Dec) (R, 142 Bytes)

Variable Type Length Description

Flow E vent UI 40 bytes
Purge Flow

Event
Time TIM 80 bytes

UC 20 by tes

zone and a 1 indic ates no flow. Zero in dic ates flow.
20 most rec ent flow f ault events wher e a 1 indicates no f low. Zero indicate s

flow.
Time/date stamp s for 20 m ost recent logged flow ev ents. This v ar iable is an

un sig ned long i nt eger for matted as seconds since Jan 1 of 1980

B.3.19. Alarm Log Regi ster 0x1A00-02 (6656-58 Dec) (R, 582 Byte s)

Thes e registers cont ai n t he 20 m ost recent al arm event s, the t i m e they occ urred, and a poi nter t o t he m ost
recent event . The data is spl it into 3 regist ers and s houl d be recombi ned i nto an appropriate s truc ture after
all three regis ters have been rec eived. Regi st er 0x1A 00h cont ai n 200 by tes , Regist er 0x1A 01h cont ai ns
200 bytes , and regist er 0x1A 02h cont ai ns 181 bytes.

Variable Type Length Description

Event UC

Time TIM

320

bytes

260

bytes

20 most rec ent alar m events. Each event cont ains 1 byte f or eac h zone. Each
zone Byt e is defined as 0=No Alarm, 1=Leak Alarm, 2=S pill Alarm, 3=Evac
Alarm .

Time of each alarm event. T IM value as defined in NOT E 2 of Zone Dat a

62 P/N: 3015-5074 Rev 11

Multi-Z one Gas Monitor s

Rel_Svc_Mode

*

*

See description of STATUS REGISTER

Ent Sv c_Mode

* * See description of STATUS REGISTER

16 Unsigned Integers that repr esent the PPM values for eac h MZ monitor

B.3.20. Ser vi ce M o d e Register 0x001B (27 Dec) (W, 10 Bytes)

Variable Type Length Description

B.3.21. Release Service Mode 0x001C (28 Dec) (W , 10 Bytes)

Variable Type Length Description

B.3.22. MZ Ser vi ce Mod e

The MZ monitor can be placed into s ervice mode if nec essary . During service mode the uni t wil l t ake no
meas urem ents , any and all al arm s are si l enced, and al l relays are opened. The unit aut om aticall y comes
out of s ervice mode aft er a pres et interval defined by t he servi ce_mode_ T O parameter i n t he Sy st em Dat a
Register.

Placing the unit into Se rvice Mode:

1. Read the MZ S tat us Re gi st er (0x0011h)

2. Modify the c ontent of t he st atus regi st er st ruc ture t o change t he M ODE parameter t o service

mode.

3. Send t hi s updat ed stat us regist er st ruct ure bac k to t he MZ unit using P RESET MULTIPLE

REGISTER COMMAND t o the SERV ICE MODE RE GISTE R (0x0 01Bh) .

Relea sing the uni t f rom Ser vice Mode:

1. Read the MZ S tat us Re gi st er (0x0011h)

2. Modify the c ontent of t he st atus regi st er t o change t he M ODE parameter t o normal m ode.

3. Send t hi s updat ed stat us regist er st ruct ure bac k to t he MZ unit using P RESET MULTIPLE

REGISTER COMMAND t o the RELEASE SERVICE MO DE REGISTER (0x001Ch).

B.3.23. PPM Register 0x001E (3 0 Dec) (R, 32 Bytes)

Variable Type Length Description

PPM UI 32 bytes

zone

NOTE: 16 values are ret urned independent of the number of act ual zones inst al l ed i n t he
unit . Th e m ast er device i s required to know how many zones are i nst al l ed in t he uni t
(a vail abl e i n t he Sy st em Regi st er) in order to properly interpret the dat a.

B.3.24. Zone Log Registe rs 0x3xyy (R, 1502 Byte s)

Thes e registers are us ed to t ransfer the zone log data. Each z one has a circ ul ar l og of 100 past dat a poi nts .
The period bet ween data points i s defined by the Log Interval param eter in each c orresponding Zon e Dat a
Register. The data for eac h z one i s defined by t he “x” place i n the abo ve regist er address . F or zone 1 t he
Regis t er address i s 0x 30yyh, for zone 2 the regi st er address i s 0x 31yy h, et c. The data for eac h zone i s s ent
in 8 c onsec utive regist ers due t o M ODB US RT U mes sage length cons trains. The address es are defined by
the “y y” pl ac e i n the above addres s. For zone 1, al l l og data can be obtai ned by reading 0x3000h, 0x3001h,
0x3002h, …… , 0x3007h. The first s even regist ers c ontain 200 byt es each and the l ast regi st er cont ai ns
102 bytes . Aft er al l regist ers have been received the dat a shoul d be reas sem bl ed into t he full data
structure.

P/ N: 3015-5074 Rev 1 1 63

Multi-Z one Gas Monitor s

Index

UI

2

Point to current r eading

PPM

UI

200

La st 100 log poi nts (2 byes per point)

CO2/R-744

0

00

R508B

21

15

R11 0 00

R408A

23

17

R12 1 01

FA188

24

18

R22 2 02

R236FA

25

19

R23 3 03

N1230

26

1A

R113 4 04

R227

27

1B

R114 5 05

HFP

28

1C

R123 6 06

FC72

29

1D

R124 7 07

R21

30

1E

R134A 8 08

R125

31

1F

R401A 9 09

H1211

32

20

R402A

10

0A

H2402

33

21

R402B

11

0B

R245FA

34

22

R404A

12

0C

R422A

35

23

R407A

13

0D

R422D

36

24

R407C

14

0E

R427A

37

25

R409A

15

0F

H1234YF

38

26

R500

17

11

R426A

40

28

R503

19

13

R32

42

2A

R507

20

14

Variable Type Length Description

Time TIM 1300

Time record for eac h of the 100 log points. The for mat for the TIM type is
defined in note 2 of zone data

B.3.25. MODBUS Exce ption Response s

The following M O DB US exc eption respons es are support ed by t he unit.
01 Illegal F unct i on

02 Illegal Data A ddress
03 Illegal Data V al ue
06 Sl ave Devic e Bus y (Oc curs onl y when MZ i s c onnect ed to t he bus t hrough an RD and t he RD is

not i n t he SY S TEM or ZO NE V IE W sc reen)

B.3.26. MODBUS Gas Enumera tion

The following tabl e provides dec i m al and hexadec i m al M ODB US enumerat ions for s upport ed refrigerant

R ef rigerant Gas DEC HEX R ef rigeran t Gas DEC HEX

NH3/R-717 0 00 H1301 22 16

R410A 16 10 R424A 39 27

R502 18 12 R438A 41 29

64 P/N: 3015-5074 Rev 11

APPENDIX C. SYSTEM MENU MAP

Multi-Z one Gas Monitor s

P/ N: 3015-5074 Rev 1 1 65

Multi-Z one Gas Monitor s

66 P/N: 3015-5074 Rev 11

APPENDIX D. AGENCY APPROVALS

Multi-Z one Gas Monitor s

P/ N: 3015-5074 Rev 1 1 67

Multi-Z one Gas Monitor s

68 P/N: 3015-5074 Rev 11

Multi-Z one Gas Monitor s

Max . S ensitivity Threshold wit hi n Ins t rum ent Reading Range

10,000 ppm

Repeatability at 500 ppm

± 1% of reading

European S tandard E N14624: 2005 tes ti ng with R-13 4a (Haloge n Gas M oni t or Only).

Min. S ensitivity Threshold 1 ppm
Max . S ensitivity Threshold (within 1 ppm ± 10% r eading ac curac y range) 1,000 ppm

Zeroi ng Tim e from 1,000 ppm * <12 sec onds
Zeroi ng Tim e from 10,000 ppm * <25 s econds
React io n Ti me f or detec tion of mi ni mum threshold* ≤12 s econds
Min. S ensitivity threshold once max. threshold has been measured 1 ppm

* Based on a m inimum tubi ng lengt h of one foot

P/ N: 3015-5074 Rev 1 1 69

Multi-Z one Gas Monitor s

70 P/N: 3015-5074 Rev 11

APPENDIX E. SER VICE CENTERS

Uni ted States

Bachar ach, Inc .
621 Hu nt V alley Circle
New Kensington, PA 15068
Phone [phone]
Fax: [phone]
Email: [e-mail]

Canada

Bachar ach of Cana da, Inc.
20 Amber St r eet Unit #7
Markham, O ntario L3 R 5P 4
Canada
Phone: [phone]
Fax: [phone]
Email: [e-mail]

Europe

Murco Limite d – a B ac harach Comp any
114a Georges Str eet Lower
Dun La oghaire
Co. Dublin
Ireland
Phone: [phone]
Fax: [phone]
Email: [e-mail]

Multi-Z one Gas Monitor s

P/ N: 3015-5074 Rev 1 1 71

Multi-Z one Gas Monitor s

72 P/N: 3015-5074 Rev 11

INDEX

Multi-Z one Gas Monitor s

NUM BE RS

0007-1650.............................................. 47, 48

0007-1655.........................................12, 47, 50

0007-1656.............................................. 12, 50

0007-1657.............................................. 12, 50

0204-0020....................................................48

0304-3235....................................................47

0304-5111....................................................48

04-2620 .......................................................47

204-0020......................................................48

3015-2906.............................................. 47, 48

3015-2969................................................ 4, 48

3015-3076....................................................49

3015-3125..................................... 4, 11, 47, 48

3015-3235.............................................. 11, 48

3015-3411.........................................12, 48, 49

3015-3420............................... 4, 11, 12, 47, 48

3015-3430....................................................49

3015-3437....................................................49

3015-3438....................................................49

3015-3849....................................................49

3015-3850....................................................49

3015-3851....................................................49

3015-3852....................................................49

3015-4121....................................................49

3015-4123....................................................49

3015-4492....................................................48

3015-4562....................................................48

3015-4572....................................................48

3015-4992....................................................49

3015-5072....................................................49

3015-5073....................................................49

3015-5074................................................... i, 4

3015-5080....................................................49

3015-5081....................................................49

3015-5109....................................................10

3015-5152.........................................21, 48, 49

3015-5171.........................................12, 48, 49

3015-5176....................................................48

3015-5389....................................................48

3015-5390....................................................48

3015-5404.............................................. 12, 49

3015-5405.............................................. 12, 49

3015-5483....................................................48

3015-5490....................................................49

3015-5491....................................................49

3015-5492....................................................49

3015-5493....................................................49

3015-5512..................................... 4, 12, 47, 48

3015-5521....................................................48

3015-5522....................................................49

3015-5523....................................................48

3015-5524....................................................49

3015-5525....................................................49

3015-5526....................................................49

3015-5527....................................................49

3015-5528....................................................49

3015-5530....................................................49

3015-5542....................................................49

4-20 mA DC output s/ l oops....................... 13, 38

Inte rfac e Board.................................... 21, 48

A

A2D fault ................................................ 37, 59

absorbance ..................................................44

AC input power .... 2, 8, 13, 14, 23, 24, 38, 47, 48

disconnecting ..............................................9

removing prior to s ervice ..............................2

source .................................................. 2, 13

terminals ............................................. 13, 23

accessories ....................................4, 12, 48-50

accuracy ........................................................7

acknowledging alarms.............. 6, 33, 34, 35, 58

active diagn ost i cs ...........................................5

address ...................... 17, 28, 30, 45, 57, 59, 63

air li nes .............................................11, 31, 48

tubing .......................................................47

air pump.......................................................13

alarm(s) 4-6, 8, 19, 20, 23, 24, 26, 29, 33-35, 38,

47, 49, 55-60, 62, 63

acknowledgem ent m ode ...................... 26, 35

audible................................. 4, 26, 33, 35, 36

condition ................. 26, 33, 35, 36, 44, 59, 60

detai l s creen ....................................... 34, 35

e vent l og ...................................................36

LED ...................................................... 4, 33

levels ..........................................................5

log ............................................................20

manuall y ack nowled ged .............................26

nuisance .....................................................5

set points ....................................................5

settings ............................................... 53, 60

summary screen.................................. 34, 35

time ..........................................................34

unacknowledged .......................................34

uncleared..................................................34

alphanumeri c c haract ers .............. 26, 29, 30, 31

altitude limit ....................................................3

ambient air, CO

presence ...................... 11, 42

2

ambient pres sure ..........................................44

annual maintenance kits................................49

ANSI/BSR ASHRAE 15-2007 ...................... 5, 7

ASHRAE S afety Code 34-2007 ................... 5, 7

P/ N: 3015-5074 Rev 1 1 73

Multi-Z one Gas Monitor s

audible alarm........................... 4, 26, 33, 35, 36

B

Bacharach

service center.......................................... 3, 9

website .....................................................16

battery .........................................................48

repl acem ent s chedule ................................48

s h e lf l ife ....................................................48

bau d rat e......................................................28

Bel den cable #8762 ......................................17

bench................................................38, 45, 61

tem p fa ul t..................................................38

blockage ......................................................37

box temp fault...............................................38

building managem ent s yst em .... 5, 8, 15, 17, 18,

21, 55

bypassing a zone ..........................................19

C

cabl e shiel d ..................................................22

cabl e ties......................................................13

CAL f act or ............................................... 40-44

calibration ............................. 18, 20, 41, 42, 45

factor ................................................... 40-44

factory, voiding ..........................................41

procedure .................................................41

screen ................................................. 40-43

cautions and warnings ....................................1

CE M a rk.........................................................8

cfg file ext ension ...........................................20

charc oal filt er ............................ 4, 11, 37, 47-49

chass i s t em perature......................................44

ci rcuit board ......................................15, 22, 23

ci rcuit break er........................................... 2, 14

cl ean ai r .......................................................10

cleaning .........................................................3

cl eari ng purge l i ne .................................. 19, 25

cl ipping fault ........................................... 37, 59

cl ock batt ery .................................................48

COM1 and COM2 .........................................19

com m uni cat i ons param et ers..........................19

com m uni cat i ons protocol.................................5

components ............................................. 4, 13

concentration................................................44

condensation ................................................12

conduit ................................................... 13, 23

config fault ............................................. 38, 59

connections ........................................ 2, 15, 22

exhaust l i ne...............................................10

pur ge li ne..................................................10

relay .........................................................23

sam pl e l i nes ..............................................10

contaminants .....................................11, 37, 47

crimp-on ri ng t erm inals..................................13

critical faults ........................................... 37, 38

cu rrent l oop ........................................... 22, 38

board ..........................................................4

fault ..........................................................22

isolator......................................................22

outputs ............................................... 21, 22

cycle time .....................................................32

D

damage..............................1, 3, 6, 9, 14, 21, 47

pre ve nting during s hi pment ........................13

shipping ......................................................9

data di s play sc reen ............................25, 29, 37

data poi nt .....................................................40

date .............. i i i , 8, 34, 36, 39, 40, 48, 57, 60, 62

DB25-to-DB9 adapt er....................................20

detection limit ...............................................27

detect or c onnector ........................................13

diagnos tic sc reen......................... 20, 38, 44, 45

digipot .................................................... 29, 37

dimensions .....................................................8

dis pl ay s creen ................................................4

dis tanc e parameter .........................................5

downst ream port ...........................................17

drill i ng hol es ............................................. 9, 14

E

EDIT menu ...................................................19

elec trical connect i ons and wi ring .......... 9, 13, 14

elec tronic c om ponents .............................. 9, 47

emissions .......................................................4

emitter .........................................................30

EN14624......................................................67

enclosure ....................... 2, 9, 10, 14, 16, 45, 47

end-of-line filter.............................. 4, 12, 47, 49

ESC key............................................25, 35, 40

evacuation ............................................... 4, 47

alarm ................................. 23, 33, 53, 58, 59

le vel ..........................................................33

Exc el file ......................................................20

exhaust l i ne ........................................ 5, 37, 47

connecting ................................................11

max l ength ...................................6, 9, 11, 12

exhaust port ............................................. 2, 48

max l ength ................................................32

exhaust tubing ................................................5

expl osive at m osphere warning.........................2

ext ernal alar m ............................... 4, 24, 33, 36

devices, triggering ................................. 4, 23

external monit ori ng devi c es ...........................21

external power s ource ............................. 23, 24

F

fact ory defaul t set tings ............................ 38, 41

fault(s) .. 4-6, 8, 20, 23, 26, 36-39, 44, 45, 47, 50,

55-59, 62

log ...................................................... 20, 39

74 P/N: 3015-5074 Rev 11

Multi-Z one Gas Monitor s

screen ................................................ 37, 39

filter(s) .................. iii, 4, 5, 11, 12, 37, 47-50, 59

replacement ..............................................12

termination ................................................12

firm wa re versi on ...........................................25

flammable li qui ds ........................................ 2, 9

flashing b ox (alarm c ondi t i on) .................. 34, 44

flo w c ontrol ...................................................19

flo w events ............................................. 39, 62

flow l og screen .............................................39

viewing .....................................................39

front panel .......................................4, 5, 18, 25

indicator .......................................4, 5, 18, 25

keypad......................................................25

fuse(s) .................................... 3, 13, 24, 47, 48

fuses...............................................................

G

gain s et f aul t......................................36, 37, 59

gas i nl et .......................................................13

gas library ......................................................7

gas outlet .....................................................13

gas ty pe .......................................................44

gas/refrigerant type .......................................31

ground ........................................ 13, 14, 15, 22

GN D t erm i nal /stud .....................................13

gro und wire ......................................... 13, 14

H

Halo gen G as Moni tor .......................... 4, 11, 67

HGM300 PC soft ware ...................................18

highes t P P M concent rat i on mod e ..................27

hold mode ................................... 41, 43, 57, 61

horn ....................................................... 24, 35

humid i nst al lati on area ....................................6

humidity .........................................................8

hydrophobi c filter .................................... 13, 47

I

inc rease moni toring capacity .........................12

infrared z ero baseli ne....................................10

in-lin e fuse ...................................................24

installation ..................... 1, 2, 5, 9, 11-13, 21, 38

int ake placement ..........4, 9-11, 12, 37, 47, 48

ins truc t i on m anual...........................................4

int ake c onnect ors .........................................11

int ake li ne(s)........................................... 11, 12

condensation.............................................12

max l ength ................................................12

IR benc h/detector ................................... 13, 29

replacement kit ..........................................48

IR digipot......................................................30

IR so urce c onnector ......................................13

is ol at ed grou nds ...........................................22

J

J5 connec tor.................................................13

J6 connec tor.................................................13

jum per wire ..................................................22

K

knockout(s) .......................... 3, 9, 13-1 5, 22, 23

L

laptop..................................................... 19, 20

leak..... 4-6, 1 9, 23, 26, 33, 42, 53, 58, 59, 60, 62

alarm ........................................................33

le vel ..........................................................33

LED(s) ...................................... 4, 8, 35, 36, 38

lengt h param eter ..........................................12

LI NE 1 .........................................................13

LI NE 2 .........................................................13

line end filter.................................. 4, 11, 12, 47

placement .................................................12

line terminati ons ...........................................12

location ...................5, 11, 12, 26, 31, 34, 40, 42

log ........................20, 32, 36, 39, 40, 60, 63, 64

files ..........................................................38

interval......................................................32

pre vious readings ........................................4

loop fault ................................................ 38, 59

loop mode ....................................................27

loop2 factor ............................................ 21, 27

M

main PC b oard .............................................13

maintenance......................................1, 2, 5, 47

manifold(s) ........................11-13, 26, 38, 45, 48

pressure ...................................................44

repl acem ent fit t i ngs ...................................49

meas urem ent c ycle............................31, 32, 33

meas uring r ange.............................................7

mec hani cal room .................................... 5, 6, 9

memory................................. 33, 36, 39, 41, 56

menu map .............................................. 65, 67

microproc ess or board ...................................13

Microsoft Excel file ........................................20

MODBUS ................................ 5, 15, 44, 55, 63

function.....................................................44

model num ber ..............................................29

modifications ..................................................3

moisture ............................................11, 12, 47

monitoring capacity , increasing ......................12

mounting

bracket .....................................................12

cutouts........................................................4

location ................................................. 9, 10

template................................................ 4, 10

MZ netw ork ............................................ 17, 55

P/ N: 3015-5074 Rev 1 1 75

Multi-Z one Gas Monitor s

N

NEC/CEC com plianc e ............................. 13, 14

network ......16, 17, 28, 30, 31, 34, 35, 38, 55, 56

neutral .........................................................13

no fl ow on purge ...........................................37

no fl ow on z one ............................................37

nod e address ....................................17, 28, 30

normall y c l osed ............................................23

normall y open...............................................23

nuis ance alarm s .............................................5

number of ins tall ed zones..............................26

O

opti cal bench t em perature .............................44

opti cal sens or output voltages........................44

output voltag es .............................................44

outputs.........................................................13

o ver r ange detec ted ......................................37

P

password .......................................... 28-30, 56

patent ............................................................ ii

PCMCIA slot.................................................20

PCMCIA-to-serial c onverter ...........................20

peak conc entrat i on/PPM le vel.................. 33, 34

peak tim e .....................................................34

personal computer .................................... 5, 16

pic k up points , det ermining best l ocat i ons.........6

polarity ................................................... 15, 22

polling .................................................... 31, 56

power LED ............................................... 4, 25

power suppl y .......................................... 13, 21

de-energi zing on malfunc tion........................3

universal .....................................................2

PP M reading .......................................... 34, 45

pressure c onnect or .......................................13

pressure s ensor............................................38

printi ng screens and l ogs...............................20

programming ................................................25

new gases ................................................42

protec tive ground ...................................... 2, 14

pump ................................................13, 48, 61

pur ge li ne ...................................... 5, 10, 11, 37

clearing............................................... 19, 25

max l ength ............................................ 6, 11

pur ge port .............................................. 11, 39

R

R-123 g as cylinder and verificat i on kit ............49

R-134a gas cy l i nder an d verificat i on ki t ..........49

R-22 gas cy l i nder an d veri ficat i on kit ..............49

RD ........................ See Re m ot e Di splay M odul e

RDM setup s creen #1 ...................................38

react i on tim e.................................................67

receive port ..................................................44

red uc er ki t ....................................................48

refrigerant ................................. 5, 7, 11, 47, 60

monitor vs. anal y zer.....................................5

regis ter add ress ............................................44

relays......................... 13, 23, 26, 35, 38, 60, 63

connectors .......................................... 13, 23

contacts ................................................ 4, 23

in t he RD .................................................6

rating.....................................................23

Rem ote Display Module . 6, 8, 15, 17, 31, 35, 36,

55, 56

dis tanc e from MZ.........................................6

max di st ance t o M Z ...................................15

remote monitoring equipment ..........................4

repair ................................................... iii, 3, 13

repeatability..................................................67

repl acem ent of fil t ers.......................................5

repl acem ent part s ................................... 47, 48

re-zero mode ................................................28

re-zero volt tol ........................................ 36, 37

RS-232 .............................................16, 19, 20

cable .................................................. 19, 20

communications param et ers ......................19

interface.............................................. 16, 19

output .......................................................20

port....................................................... 5, 19

RS-485 .......................................................28

cable, max length ......................................17

com m uni cat i ons error ................................38

connector.......................................13, 15, 17

fault .................................................... 38, 59

interface......................................................5

recommendations ......................................17

wiring........................................................15

S

safety............................. 1, 2, 4, 6, 9, 13, 14, 48

sam pl e i ntak e l i nes ..........4, 9-11, 12, 37, 47, 48

max l ength ............................................ 9, 12

sam pl e pum p.......................................... 45, 48

sam pl e tubing .................................................5

sam pl i ng cy cl e t i m e.........................................9

sam pling point s, s uggest ed l ocat i ons ...............5

saving screens and l ogs ................................20

Sealevel Systems, Inc. ..................................20

sensiti vity t hreshold................................... 7, 67

minimum ...................................................67

sensor li fe ......................................................8

sensor t em peratur e................................. 29, 45

coefficient .................................................30

seri al port connect i on ....................................19

service ..... ii, 5, 13, 15, 16, 22, 23, 29, 57, 58, 63

centers .....................................................71

knockout ...................................................13

mode ....................................... 28, 29, 58, 63

76 P/N: 3015-5074 Rev 11

Multi-Z one Gas Monitor s

set points .......................................................5

setup ...........................................................25

menu ........................................................27

setup s creen #2 ...................................... 28, 38

shipping ................................................... 9, 13

shock hazard ........................................ 2, 3, 14

si l ence mode ................................................35

sm oke t est......................................................6

soft ware sc reen ............................................20

solenoid .......................................................38

connections.................................................4

specifications......................ii, iii, 7, 8, 10, 41, 57

spill ..........4, 6, 19, 23, 26, 33, 53, 58, 59, 60, 6 2

alarm ........................................................33

le vel ..........................................................33

spl ash s creen ...............................................25

splitter kit......................................................12

squel ch s ett i ng .............................................27

stand-alone sy st em .........................................5

stat i c box......................................................34

strobe .................................................... 24, 35

surge protection..............................................2

switches .......................................................13

sys tem fault s ........................................ 4, 8, 36

LED ............................................................4

clearning ...................................................38

sys tem m enu m ap .................................. 65, 67

sys tem s etup sc reen(s) .......... 21, 27, 29, 41, 44

screen #1..................................................25

screen #2................................. 25, 26, 28, 31

screen #3............................................ 28, 29

T

T-bolt brack et .................................................4

temperature....................................................8

coefficient .................................................29

compensation............................................44

terminal connect or ........................................38

term i nat ing mul t i ple moni tors .........................17

term i nat ing the cable shi el d ...........................22

term i nat ion s witc hes .....................................13

terminator(s)........................................... 16, 17

tolerance ......................................................37

trans m i t port .................................................44

trend ................................ 20, 32, 38, 40, 41, 55

graph ........................................................40

data ...............................................20, 40, 41

screen ...........................................32, 35, 40

tubing........................... 8, 11, 12, 45, 47, 48, 67

ben d radi us ...............................................11

installing ...................................................11

length ................................................. 32, 44

removing...................................................11

restrictions ..................................................5

twist ed shi el ded pair .....................................15

U

UL cl as si ficat i on..............................................3

unused zones ...............................................12

disabling .....................................................5

UPS ...............................................................2

upstream port ...............................................17

USB-to-s erial convert er ........................... 19, 20

V

vacuum pres sure ..........................................44

W

warm up cy cl e ..............................................25

warm up sc reen ............................................25

warni ngs and caut i ons ....................................1

warranty .................................................... iii, 8

regis t ering o n-line ....................................... iii

voiding ...........................................1, 3, 9, 14

washers .......................................................13

water s top ............................... 6, 12, 47, 48, 50

website ........................................................16

wet inst al l ation area ........................................6

Windows ................................................ 19, 20

www.dataforth.com .......................................22

X

xl s file ext ensi on ...........................................20

Z

zero fil t er fault......................................... 37, 59

zeroing tim e .................................................67

zone(s).....5, 8, 26, 27, 31, 32, 36-4 0, 48, 56, 57,

58, 59, 63

current ......................................................44

hold mode .................................................43

hold t i m e ...................................................27

name ........................................................34

number .................................... 27, 34, 57, 59

setup s creen ........................ 5, 12, 31, 32, 35

zones..............................................................

disabling ...................................................12

max i m um number........................................4

P/ N: 3015-5074 Rev 1 1 77

∇ ∇ ∇

621 Hunt Valley Circle, New Kensington, PA 15068-7074

Tol l Free: 800-736-4666 • Tel: [phone] • FAX: [phone]

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