Bacharach AGM-SZ Installation & Operation Manual

Single Zone Gas Monitors

HGM-SZ (Halogen) and AGM-SZ (Ammonia)

Instruction 3015-4256

Installation / Operation / Maint e na nc e

Rev 13 – January 2013

Product Leadership • Training • Service • Reliability

Patent 6,590,690

UL 61010-1

CSA 22.2 No. 61010-1

EN 14624

Single Zone Gas Monitor

WARRANTY

Bacharach, Inc. warrants to Buyer that at the time of delivery this Product will be free from defects in material and
manufacture and will conform substantially to Bacharach Inc.'s applicable specifications. Bacharach's liability and
Buyer's remedy under this warranty are limited to the repair or replacement, at Bacharach's option, of this Product or
parts thereof returned to Seller at the factory of manufacture and shown to Bacharach Inc.'s reasonable satisfacti on
to have been defective; provided that written notice of the defect shall have been given by Buyer to Bacharach Inc.
within two (2) years after the date of delivery of this Product by Bacharach, Inc.

Bacharach, Inc. warrants to Buyer that it will convey good title to this Product. Bacharach's liability and Buyer's
remedy under this warranty of title are limited to the removal of any title defects or, at the election of Bacharach, to
the replacement of this Product or parts thereof that are defective in title.

The warranty set forth in paragraph 1 does not apply to parts the Operating Instructions designate as having a limited
shelf-life or as being expended in normal use (e.g., filters).

THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED IN LIEU OF (I) ANY AND
ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE: AND (II) ANY OBLIGA­TION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACT OR TORT, WHETHER OR NOT ARISING FROM
BACHARACH'S NEGLIGENCE, ACTUAL OR IMPLIED. The remedies of the Buyer shall be limited to those provided
herein to the exclusion of any and all other remedies including, without limitation incidental or consequential
damages. No agreement varying or extending the foregoing warranties, remedies or this limitation will be binding
upon Bacharach, Inc. unless in writing, signed by a duly authorized officer of Bacharach.

Register your warranty by visiting

www.MyBacharach.com

NOTICE

Effective as of revision 4, this inst ruction manual refers to the current “new style” of Single-Zone leak monitoring
equipment (which has its pump mounted on the inside bottom of the cabinet). For information on the older style of
monitoring equipment (pump mounted to the inside top of the cabinet), refer to Rev 3 of this manual. Contact
Bacharach for additional information.

Product improvements and enhancements are continuous; therefore the specifications and information contained in
this document may change without notice.

Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential damages in
connection with the furnishing, performance, or use of this material.

No part of this document may be photocopied, reproduced, or translated to another language without the prior written
consent of Bacharach, Inc.

Patent 6,590,690

Copyright © 2005-2012, Bacharach, Inc. All rights reserved.

BACHARACH® is a registered trademark of Bacharach, Inc.

All other trademarks, trade names, service marks and logos referenced herein belong to their respective owners.

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Single Zone Gas Monitor

Table of Contents

SECTION 1. INTRODUCTION..................................................................................................................... 1

1.1. How to Use This Manual..................................................................................................................... 1

1.2. Warning Statements ........................................................................................................................... 1

1.3. Caution Statements ............................................................................................................................ 1

1.4. Hazard Symbols Located on the Monitor ........................................................................................... 1

1.5. Safety Precautions .............................................................................................................................. 1

1.5.1. AC Power Supply .................................................................................................................... 2

1.5.2. Protective Grounding ............................................................................................................... 2

1.5.3. Explosive Atmosphere ............................................................................................................. 2

1.5.4. Proper Exhaust Venting .......................................................................................................... 2

1.5.5. Accessing the Interior of the Monitor ....................................................................................... 2

1.5.6. Misuse and Modifications to the Monitor ................................................................................. 2

1.5.7. In Case of Malfunction ............................................................................................................. 2

1.5.8. Fusing ...................................................................................................................................... 3

1.5.9. Installation Category ................................................................................................................ 3

1.5.10. Altitude Limit ............................................................................................................................ 3

1.5.11. Cleaning .................................................................................................................................. 3

1.6. Functional Overview ........................................................................................................................... 3

1.6.1. General Description and Use .................................................................................................. 3

1.6.2. Understanding Monitor ing Levels ............................................................................................ 3

1.6.3. Suggested Location of Sampling Point ................................................................................... 4

1.7. Specifications ...................................................................................................................................... 5

SECTION 2. INSTALLATION ...................................................................................................................... 7

2.1. Installation Considerations.................................................................................................................. 7

2.1.1. Warnings and Cautions ........................................................................................................... 7

2.1.2. Inspection ................................................................................................................................ 7

2.1.3. Location of the Monitor ............................................................................................................ 7

2.2. Mounting Instructions .......................................................................................................................... 7

2.3. Connecting Gas Sample and Exhaust Lines ...................................................................................... 8

2.3.1. Overview .................................................................................................................................. 8

2.3.2. Tubing Considerations ............................................................................................................ 9

2.3.3. Connecting the Gas Sample Line............................................................................................ 9

2.3.4. Connecting the Exhaust Line ................................................................................................ 10

2.3.5. Connecting the Purge Line .................................................................................................... 10

2.3.6. Installing Optional Splitter Kit ................................................................................................ 10

2.3.7. Connecting the Water Trap ................................................................................................... 10

2.4. Interior Schematic (Halogen HGM) .................................................................................................. 11

2.5. Interior Schematic (Ammonia AGM) ................................................................................................. 12

2.6. Electrical Wiring ................................................................................................................................ 13

2.7. Connecting External Alarms ............................................................................................................. 14

2.7.1. Overview ................................................................................................................................ 14

2.7.2. Connection ............................................................................................................................ 14

2.8. 4–20 mA Current Loop Interface ...................................................................................................... 16

SECTION 3. OPERATION ......................................................................................................................... 17

3.1. Front Panel Display and Controls ..................................................................................................... 17

3.2. General Operation ............................................................................................................................ 18

3.3. Display Screens ................................................................................................................................ 19

3.3.1. Initial Power Up ..................................................................................................................... 19

3.3.2. Data Display Screen .............................................................................................................. 19

3.3.3. Function Screens .................................................................................................................. 19

3.4. Gas Alarms ....................................................................................................................................... 22

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Single Zone Gas Monitor

3.4.1. Overview ................................................................................................................................ 22

3.4.2. Clearing / Silencing a Gas Alarm .......................................................................................... 22

3.4.3. Viewing the Gas Alarm Log ................................................................................................... 22

3.5. System Faults ................................................................................................................................... 23

3.5.1. Overview ................................................................................................................................ 23

3.5.2. Clearing / Silencing a Fault Alarm ......................................................................................... 23

3.5.3. Viewing the Fault Log ............................................................................................................ 23

3.5.4. Fault Codes ........................................................................................................................... 24

3.6. Clearing the Stored PPM Log, Alarm and Fault Data ....................................................................... 25

3.7. Reset to Factory Default Settings ..................................................................................................... 25

3.8. The P-CHK Function ......................................................................................................................... 25

3.8.1. Overview ................................................................................................................................ 25

3.8.2. Keypad Functions .................................................................................................................. 25

3.8.3. Screen Display ...................................................................................................................... 25

3.9. The DIAGNOS Function ................................................................................................................... 26

3.9.1. Overview ................................................................................................................................ 26

3.9.2. Keypad Functions .................................................................................................................. 26

3.9.3. First Diagnostic Screen ......................................................................................................... 26

3.9.4. Second Diagnostic Screen .................................................................................................... 26

3.10. The Calibration Function................................................................................................................... 27

3.10.1. Overview ................................................................................................................................ 27

3.10.2. Calibration Procedure ............................................................................................................ 27

3.10.3. Adjusting Calibration Factor .................................................................................................. 27

SECTION 4. MAINTENANCE.................................................................................................................... 28

4.1. Warnings and Cautions .................................................................................................................... 28

4.2. Charcoal Filter (Halogen Gas Monitor Only) .................................................................................... 28

4.3. Hydrophobic Filters ........................................................................................................................... 28

4.4. Servicing Air Lines and Termination Filters ...................................................................................... 28

4.5. Fuses ................................................................................................................................................ 29

4.6. Sample Pump ................................................................................................................................... 29

4.7. End-of-Line Water Stop (Optional) ................................................................................................... 29

4.8. Water Trap (Optional) ....................................................................................................................... 29

4.9. Clock Battery .................................................................................................................................... 29

4.10. Replacement Parts and Optional Accessories ................................................................................. 30

4.11. Service Centers ................................................................................................................................ 31

APPENDIX A. DATA TABLES .................................................................................................................. 32

A.1. Recommended Alarm Settings ........................................................................................................... 32

A.2. Response Time/Flow Rate ................................................................................................................. 33

APPENDIX B. AGENCY APPROVALS .................................................................................................... 34

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Single Zone Gas Monitor

SECTION 1. INTRODUCTION

1.1. How to Use This Manual

Thank you for investing in a BACHARACH Single Zone Monitor. This manual provides important
information on how to install, operate, and service the SZ monitoring unit.

To assure operator safety and the proper use of the monitor, please read, understand, and follow the
contents of this manual.

If you have a work ing knowledge of gas monitors, yo u will find this m anual useful as a ref erence tool. If
you are new to the use of gas monitors, you can educate yourself about the princ iples of gas detection
and the proper operation of this device by reading this manual thoroughly.

1.2. Warning Statements

The use of the word WARNING in th is manual denotes a potentia l hazard associated with the us e of this
equipment. It calls attention to a procedure, practice, or condition, or the like, which if not correctly
performed or adhered to, could result in personal injury or death.

1.3. Caution Statements

The use of the word CAUTION in t his manual denote s a potential hazard assoc iated with the use of this
equipment. It calls attention to a procedure, practice, condition, or the like, which if not correctly
performed or adhered to, could result in damage to the equipment.

1.4. Hazard Symbols Located on the Monitor

This symbol indicates the need to consult this manual when opening the enclosure.
WARNING: A potential risk exists if the operating instructions are not followed.

This symbol indicates the presence of electric shock hazards when enclosure is opened.
WARNING: To avoid risk of injury from electric s hock, do not open the enc losure without

first disconnecting AC power.

1.5. Safety Precautions

WARNING: This instrument has not been designed to be intrinsically safe for use in areas

classified as hazardous locations. For your safety, DO NOT
locations.

WARNING: This is NOT a safety device. Some gases which this instrument can detect
may be combustible/flammable. When properly configured, this instrument is designed to
alarm at concentrations that are lower than the explosive limit of the gas. As such, it is the
buyer’s responsibility to initiate an immediate planned response to any gas leaks as soon
as they are detected. This equipment should NEVER be used to measure or sample
gases at or above their respective lower explosive limits.

WARNING: The Single Zone gas monitor is not to be used in any application that is
beyond its intended purpose or beyond the scope of its specifications. Failure to follow
this warning can result in personal injury or damage to the equipment. For details on
appropriate use, refer to the general description, application, and operation discussions in
this manual.

use it in hazardous (classified)

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1.5.1. AC Power Supply

IMPORTANT: The Single Zone monitor uses a universal power supply that is capable of

accepting inputs of 100 to 240 VAC, 50/60 Hz. The monitor’s power consumption is
15 Watts. It is highly recommended that the monitor be connected directly to the AC power
source, preferably on its own circuit (with UPS or surge protection).

WARNING: A switch or circuit breaker rated 1.0 A, 250 VAC, with a minimum terminal
spacing of 3.0 mm must be attached to the monitor’s AC power leads. This switch must
also be located in close proximity to the monitor, and be in easy reach of the operator. This
switch should also be clearly marked as the monitor’s main AC disconnect device.

1.5.2. Protective Grounding

WARNING: Under no circumstances should the SZ unit be operated without connection to

a protective ground. Doing so poses a potential shock hazard and is also a violation of
electrical safety standards applicable to this type of equipment.

1.5.3. E xplos ive Atmosphere

WARNING: Do not operate this equipment in the presence of flammable liquids, vapors or

aerosols. Operation of any electrical equipment in such an environment constitutes a
safety hazard.

1.5.4. Proper Exhaust Venting

WARNING: It is imperative that the monitor’s exhaust port be vented as described in this

manual. Failure to do so may constitute a safety hazard.

1.5.5. Accessing the Interior of the Monitor

WARNING: Extreme care should be exercised when accessing the interior of the monitor.

Only qualified electrical maintenance personnel should perform connections and
adjustments. Always remove AC power before performing work inside the monitor.

1.5.6. Misuse and Modifications to the Monitor

WARNING: The protection provided by the monitor may be impaired if the monitor is used

in a manner not specified by Bacharach, Inc. Modifications to this monitor, not expressly
approved, will void th e warranty.

NOTE: Use ONLY the provided knockouts for electrical and communications wiring.
Drilling into the box will void the warranty.

1.5.7. In Case of Malfunction

WARNING: Do not continue to use this equipment if there are any symptoms of

malfunction or failure. In the case of such occurrence, de-energize the power supply and
contact a qualified repair technician or the nearest Bacharach Service Center.

2 P/N: 3015-4256 Rev 13

1.5.8. Fusing

WARNING: This device uses type “F” fuses (F1 and F2) rated at 1.0 A, 250 VAC.

Replace ONLY with Bacharach-approved fuses.

1.5.9. Installation Category

IMPORTANT: This device is classified as Installation Category II, Pollution Degree II, as

defined by UL.

1.5.10. Altitude Limit

IMPORTANT: This device is designed for operation at or below an altitude of 6,562 ft

(2,000 m). Do not operate this device above this altitude limit.

1.5.11. Cleaning

NOTE: To clean the outside of the case use a dry cloth. To avoid shock hazard and/or

equipment damage, DO NOT use soap and wat er .

Single Zone Gas Monitor

1.6. Functional Overview

1.6.1. Ge neral Description and Use

Single zone gas m onitors are specified to support com pliance to federal, state and local safety codes
governing gas emissions. Avoiding significant loss reduces equipment replacement costs, maintains
equipment efficiency, promotes safety, and protects the environment.

The Bacharach SZ is designed to continuously test for the pres ence of gas in an area that is loc at ed up t o
500 ft (152.4 m) away from the monitor. The SZ monitor displa ys the type of gas being monitored, a long
with displa ying both the c urrent gas level and the peak gas level detected in t hat area on its f ront panel
LCD. The monitor retains a log of previous readings that can be easily accessed for analysis.

An audible alarm and front panel i ndicators are provided to signal alarm and fault cond itions, and relay
contacts are provided th at can be used t o trigger ex ternal alarm devices in the event of a system f ault, or
if a leak (sm all), sp ill (m edium ), or evacuati on (lar ge) l evel of gas is d etecte d. Th e s ystem also inc ludes a
4−20 mA current loop interface that can be connected to remote monitoring equipment.

The SZ requires only minor periodic maintenance such as the occasional replacement of filters. The
monitor incorpor ates active diagnostics that continuou sly check the system for proper operation. A front
panel indicator is provided to alert an o per at or of system malfunctions, and fau lt c odes are generated that
enable the operator to identify the cause of the fault.

1.6.2. Understanding Monitoring Levels

Effective use of this monitor requires an understanding of what constitutes reasonable alarm set points for
the type of gas being monitored. Most systems leak some gas. In a good “tight” installation these
background levels will be acceptably low and often do not require corrective action. You can reduce
nuisance alarms and needless service c alls if the alarm levels are set at pract ical limits. Bacharach has
developed recommended monitoring levels based on compliance to ANSI/BSR ASHRAE 15-2007 and
ASHRAE Safety Code 34-2007. These reference levels are listed in the Appendix.

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Single Zone Gas Monitor

The SZ monitor is shipped with its leak , spill, and evacuate alarm levels set at 100, 300 and 500 ppm
respectively. Setting the monitor at these recomm ended alarm levels will satis fy the needs of most user s.
However, the ppm levels generated by system leaks into t he environment are great ly influenced by the
volume of air in the sam pling area, air cir culation, s ize of the leak , distance t o the m onitoring poi nt, and a
host of other variables. In s ome cases the alarm set points ma y need to be adjusted ei ther up or do wn to
achieve effective monitoring.

1.6.3. Suggested Location of Sampling Point

At the point of a gas leak, the gas is nearly pure. As gas is dispersed into the air, the gas molecules
diffuse, causing a di lution of the orig inal concentration. T he SZ monitor m easures the gas concentration
at the point the sam ple is collected. Therefore, if th e termination of th e collection line is not at the exact
point of the gas leak, then the monitor will read a diluted mixture of gas and air.

It should be noted that when refrigerant an d amm onia gases are cold, th ey are heaver than air and settle
below the leak point. When the gas warms to room temper ature, it becomes light er than air and t ends to
collect above the leak point. Consequently, t he sampling point s hould be located as close as possible to
the source of a potential leak. If this is impractical, then the alarm set points should be adjusted to
compensate for the dilution of the gas.

The SZ monitor should be mounted outsid e of the m echanical room or just inside a doorway to the room.
This is the “split arc hitecture desi gn” for safety of the operator. The m onitor should be r eadily accessible
for easy visual monitoring and servicing. The total length of the sample line + exhaust line can be up to
500 ft (152.4 m). If the area around the m onitor is not well ventilated, the n an optional exha ust line and
purge line can be run to an outs ide location. The total le ngth of the exhaust line + the pur ge line cannot
exceed 200 ft (61.0 m).

It may be necessary to perform a “smoke” test of the mechanical r oom to determine the best monitoring
point. The smoke test would provide the pattern of air currents present in the room.

The SZ monitor shou ld be k ept dry. W hen used in a wet or humid area, it is h ighly recom mended to use
the optional water stop accessory to avoid internal damage.

Figure 1-1. Aerial View of Example Single Zone Leak Monitor Placement in a Mechanical Room

4 P/N: 3015-4256 Rev 13

1.7. Specifications

Category HGM-SZ Specifications

Single-zone infrared monitoring system for low level continuous monitoring of CFC, HCFC

Product Type

Gas Library:

CFC
HFC

HCFC

HALON

Other

Sensitivity
Measuring

Range

Accuracy

Response Time

and HFC ref rigerant gass es used in mos t commercial re frigeration systems. System design
supports compliance to the refrigerant monitoring requirements of ANSI/BSR ASHRAE 15­2007 and ASHRAE Safety Code 34-2007.

HFP, R-11, R-113, R-114, R-12, R-502
R-125, R-134a, R-236FA, R-245Fa, R-404a (HP62), R-407a, R-407c (AC9000), R-410a

(AZ20), R-422a, R-422d, R-427a, R-507 (AZ50), R-508b (SUVA95)
R-123, R-124, R-21, R-22, R-227, R-23, R-401a (MP39), R-402a (HP80), R-402b (HP81),

R-408a, R-409a, R-500, R-503
H1211, H1301, H2402
FA188, FC72, HFO1234YF, N1230, R-420a, R-424a, R-426a, R-427a, R-438a
All gasses 1 ppm

All gasses 0 to 10,000 ppm
±1 ppm ±10% of reading from 0-1000 ppm

(R11, R22, R113: ±10 ppm ±15% of reading 0-1000 ppm)
105 seconds maximum (depe ndent on sample line length)

Single Zone Gas Monitor

Category AGM-SZ Specifications

Product Type
Gas Library

Sensitivity
Measuring Range
Accuracy
Response Time

Single zone infrared monitoring system for low level continuous monitoring of ammonia
refrigerant gas used in most commercial refrigeration systems.

Ammonia / NH
20 PPM (minimum detection limit)
25-10,000 PPM
±10 ppm ±10% of reading from 25 to 1,000 ppm
180 seconds maximum (depe ndent on sample line length)

/ R-717

3

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Single Zone Gas Monitor

Category General Single Zone Specifications

Coverage
Detector Type
Warm-up Time

Single zone
Infrared, Non-Dispersive
15 minutes
3 Indicator lights:

• Green Monitor is powered on. LED glows during normal operation; flashes

Front Panel

when unit is in warm-up mode

• Red Alarm. LED flashes when any point has exceeded the alarm setting.

• Yellow Fault. LED flashes when there is a system fault

Size (HxWxD)
Weight
Temperature Drift
Sampling Mode
Re-Zero
System Noise
Monitoring Distance
Conditioned Signal

7.5" x 13.5" x 3.625" (190.5 mm x 343 mm x 92 mm)

5.5 lbs (2.5 kg)
Less than 1 ppm per °C betw een purge cy cle s
Automatic (continuous)
Automatic (approximately every 5 minutes)
Less than 50 dB(A) @ 10 feet (3m)
500 ft. (152 m) maximum
4-20 mA DC non-isolated output (ppm)
Four SPDT alarm contacts are provided rated 2A at 250 VAC (inductive), 5 A at

Alarms

250 VAC (resistive)
Three assigned to PPM level alarms, one assigned to system faults

Power Safety Mode
Operating Temp
Ambient Humidity
AC Power
Certification
Warranty
Altitude Limit
Sensor Life

Fully automatic system reset. All programmed parameters retained.
32 to 122 °F (0 to 50 °C)
5% to 90% RH (non-condensing)
100 to 240 VAC, 50/60 Hz, 15 Watts
UL 61010-1, CAN/CSA 22.2 No. 61010-1 and CE Mark
2 years from date of shipment
6,562 ft (2,000 m) maximum
7-10 years

6 P/N: 3015-4256 Rev 13

SECTION 2. INSTALLATION

Shock hazard! Always disconnect AC power before working inside

2.1. Installation Considera t ions

2.1.1. Warnings and Cautions

WARNING: Explosi on hazard! Do not mount the SZ monitor in an area that may contain

flammable liquids, vapors or aerosols. Operation of any electrical equipment in such an
environment constitutes a safety hazard.

WARNING:
the monitor.

CAUTION: Drilling holes in the SZ enclosure may damage the unit and will void the
warranty. Please use knockouts provided for electrical connections.

CAUTION: The SZ unit contains sensitive electronic components that can be easily
damaged. Be careful not to touch or disturb any of these components.

Single Zone Gas Monitor

2.1.2. Inspection

The SZ monitor has been thoroughly inspected and tested prior to shipment from the factory.
Nevertheless, it is recommended that the monitor be r e-checked prior to i nstallation. Inspec t the outside
of the enclosure to mak e sure there are no obvious signs of shipping damage. Open the enclosure and
inspect the interior of the monitor for loose components that may have become dislodged during
shipment. If damage is discovered, please contact the nearest Bacharach Service Center for assistance.

2.1.3. Location of the Monitor

Place the monitor in a loca tion that will re quire no more than 500 f t (152.4 m) of tubing (total of sample
line + exhaust) to reach the sampling area. The ammonia monitor typically requires a purge air line
(maximum of 100 feet). The halogen monitor uses ambient air to zero its gas sensor, so the m onitor
should be located in an area that nor mall y does not contain gas. If an ex haust line is not used, locate th e
monitor in a well ventilated area so that the exhaust gas does not accumulate around the monitor’s
ventilation holes. An exhaust line can be up to 100 feet in length.

The SZ unit shou ld be operated in an environm ent that is between 32 and 122°F (0 and 50°C); h as a
relative humidity that is from 5 to 90% non-condensing; and is at an altitude of no more than 6,562 ft
(2,000 m). The area sh ould also be r elatively free of dirt, grease, and o ils that could adversely aff ect the
operation of the monitor.

The location should allow the monitor to be easily accessible for visual monitoring and servicing.

2.2. Mounting Instructions

The SZ monitor should be installed plumb and level and securely fastened to a rigid mounting surface.
The enclosure utilizes keyhole mounting designed for ¼ inch fasteners. Install the four screws as

displayed in the diagram below or by using the provided mounting tem plate. Allow the screw heads to
protrude approximately ¼ inch.

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Single Zone Gas Monitor

Figure 2-1. Enclosure Mounting Specs

Hold the monitor flat agains t the m ounting s urfac e and allo w it to slid e down enga ging the s crew heads in
the keyhole slots of the mounting brac kets. Adjust th e screws as nec essary to hold the monitor secur ely
against the mounting surface.

2.3. Connecting Gas Sample and Exhaust Lines

2.3.1. Overview

A single gas-sample line must be run from the SZ unit to the area of the facility to be monitored. An
optional exhaust line can be installed to vent the sample gas away from the monitor. All tubing
connections are made on the bottom of the enclosure as displayed in the illustration below.

* There is an additional service knockout on top of the case.

8 P/N: 3015-4256 Rev 13

Figure 2-2. HGM-SZ Monitor Bottom View

Single Zone Gas Monitor

The Single Zone monitor u ses pus h-to-

To remove tubing from a PTC

2.3.2. Tubing Considerations

Use ¼ in. outside diam eter (0.040 in. wall) flex tubing for all air lines (P/N 0304-2743 or equivalent for
HGM; P/N 0304-2742 or e quivalent for AGM). The tu bing should be clean and free of moisture or other
contaminants. The tub ing should b e cut cleanl y with a s harp knif e and care shou ld be taken no t to distort
the tubing end.

IMPORTANT! Due to the reactive nature of refrigerant and ammonia gasses, it is
important to use m aterials that will not absor b the gas as it passes thro ugh the sampling
system. The use of unauth orized tubing or an y other m aterials in the gas-sampling stream
may lead to erroneously low readings.

All tubing bends should ha ve a radius of no less than 5" (127 mm ) to ensure proper airflow. If kinks or
obstructions occur in the line, the monitor may not function properly.

2.3.3. Connecting the Gas Sample Line

Please refer to the section titled Suggested Location of Sampling Point (page 4) to learn more about
where to take a gas sample.

The gas-sample lin e can be up to 500 ft (152.4 m) in length. The com bined length of the s ample line and
exhaust line (if one is us ed) s houl d not ex ceed 500 ft (152.4 m). The end of this line should be placed near
the potential leak s ource and pos it ione d to red uce the p oss ibili t y of m ists, aer osols , oi l, wat er, d ust, or other
contaminates from bein g drawn into the monitor. For add ed protect ion, a termin ation fi lter (P/N 301 5-3420)
supplied with the monitor must be attached to the end of this line.

CAUTION: The introduction of contaminants through the gas-sample line can result in
serious and permanent damage to the monitor.

Depending on type of use and locat ion of lines , the optional end-of-line water stop f ilter assembly can be
used to prohibit moisture from entering the intake lines. Place the end of the intake line into the blue
receiver of the end-of-line water stop and tighten sufficiently.

NOTE: Only one f ilter assem bly, either the l ine-end filter or end-of-line water stop, shou ld
be used for each line.

connect (PTC) style connectors.
To insert sample lines , firmly push the

appropriate tubing into t he hole in the
center of the connect or until it seats in
the connector. Ref er to the figures at
the left.

connector, push and hold the spring­loaded collar inwards, then
simultaneously withdraw the tubing.
Refer to the figures at the right.

Figure 2-3. Using PTC Connectors: Connecting (Left) and Disconnecting (Right)

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Single Zone Gas Monitor

exhaust line terminates outside the building,

require a termination filter.

2.3.4. Connecting the Exhaust Line

The exhaust line carries the exhausted gas sam ple away from the monitor and is required if the monitor is
located in a confined, poorly venti late d ar ea. If no purge line is used (ammonia monitor) you must vent the
exhausted gas sam ple away from the monitor to pre vent erroneous readin gs due to improper zeroing of
the detector. Note that if the monitor is exposed to an unusually high level of gas for prolonged periods of
time, its charcoal f ilter (Halogen Gas Monitor Only) wi ll quickly become saturated and no longer ab le to
clean the purge-air of refrigerant gas.

The exhaust line can be up to 100 ft (30.52 m) in
length. Ideally, this line should terminate outdoors
in a location that is not exposed to th e elements.
Connect the exhaust li ne to the monitor by firm ly
pushing the tubing ont o the barbed fitting. If the

position the tubing so that no water or moisture
can enter the line. Note that this line does not

Figure 2-4. Termination Filter (P/N 3015 -3420)

2.3.5. Connecting the Purge Line

The purge is an intake line that draws fresh air into the instrument. It should not exceed 100 feet
(30.48 m) in length. It is advisable to terminate the purge line outdoors, provided the input is not exposed
to rain, snow, ice, exhaust fumes, or other airborne contaminates. If an outdoor installation is impractical,
the line should be run to an area inside the facility that you are certain is not contaminated with ambient
gas. If this is not possible, an optional charcoal filter assembly (P/N 3015-3125) can be used with the
monitor to filter refrigerant from the purge line. It may be mounted adjacent to the monitor. (Use upgrade
kit 3015-5716 to convert an SZ with an internally mounted filter to an SZ with an externally mounted filter.)
A line-end filter (P/N 3015-3420) should be attached to the end of the purge line when the charcoal filter
is not used.

2.3.6. Installing Optional Splitter Kit

Splitter Kits are m ade a vailabl e whic h al low the SZ unit to tak e gas sam ple r eadi ngs f rom several sam ple
points. These kits are designed f or use ONLY in confined/defined spaces with hig h potential for leaks,
such as food cases, c old rooms, refrigerati on rack rooms, etc. Bac harach’s SZ 2-way (P/N 3015-5404)
and 3-way (P/N 3015-5405) splitter kits are a va il ab le a s an optional access or y. Refer to instruction 3 015­5415 (supplied with kit) for detailed installation instruction.

2.3.7. Connecting the Water Trap

The water trap (P/N 0007-1655) is an optional accessory for applications that result in water or
condensation frequen tly entering the intake lines. Ins tall the trap close to the un it for the most effective
results. The intake l ine may be cut where the user finds appro priate (preferab ly close to monitor). Eac h
side of the intake line shoul d be inser te d int o the r ecei v ers on eit her s ide of the wat er tr ap. Secur e ti ght ly.
A replacement filter (P/N 0007-1656) for the water trap is available and is replaced by unscrewing the
clear plastic cup of the water trap, pulling the filter d irectly out (do not unscrew) , and inserting the new
filter into place. R eplace the cup of the water tr ap. If desired, a n option al m ounting brac ket (0007-1657)
may be used to secure the water trap in place.

NOTE: The terminati on filter (P/N 3015-3420) or end-of-line water stop filter (P/N 3 015-

5512) should be used, regardless of the presence of a water trap.

WARNING: Extreme temperatures and/or humid conditions may cause water to condense
in the tubes. A water trap is highly recommended for use in these scenarios.

10 P/N: 3015-4256 Rev 13

2.4. Interior Schematic (Halogen HGM)

Single Zone Gas Monitor

Figure 2-5. Interior Assembly of the Single Zone Halogen Gas Monitor

NOTE: The plastic cable tie s urrounding the pump is f or stability during shipping. Ple ase

remove before operating. If the unit gets shipped to Bacharach for service, reinstall a
plastic cable tie around the pump to prevent damage during shipping.

**For IR Bench Gas In/Out, see SZ bottom view drawing on page 8.

P/N: 3015-4256 Rev 13 11

Single Zone Gas Monitor

2.5. Interior Schematic (Ammonia AGM)

Figure 2-6. Interior Assembly of the Single Zone Ammonia Gas Monitor

NOTE: The plastic cable tie surrounding the pump is to ensure safe handling during

shipping. Please remove before operating. If the unit gets shipped to Bacharach for
service, reinstall a plastic cable tie around the pump to prevent damage during shipping.

*For IR Bench Gas In/Out, see SZ bottom view drawing on page 8.

12 P/N: 3015-4256 Rev 13

Single Zone Gas Monitor

Using the supplied c rimp-on

AC power ground wire
Input Ground Stud, and
between the ground stud

be located in close

the monitor’s main AC

2.6. Electrical Wiring

The SZ unit uses a universal power supply that is capable of accepting inputs of 100 to 240 VAC,
50/60 Hz. The monitor’s p ower consumption is 15 Watts (maximum). It is highly recommended that the
monitor be connected directly to the AC power source, preferably on its own circuit. The connection
should be completed with UL listed multi-conductor wire (minimum 16 AWG), rated 300 VAC at 105°C.

Locate a convenient ser vice knockout and install e lectrical conduit in the t ypical manner. Locate the AC
Input Terminals and Groun d Stud on th e inside of the m onitor (page 11). Secure the i ncom ing AC p ower
neutral (white) and live (black) wires to the LINE 1 and LINE 2 terminals.

Using the supplied crimp-on ring terminals, washers, and nuts, conn ect the incoming AC po wer ground
wire (green) to the monitor’ s AC Input Ground Stud, and then install a sep arate wire betwee n the ground
stud and the GND terminal.

ring terminals, washers, and
nuts, connect the incoming

(green) to the monitor’s AC
then install a separate wire
and the GND terminal.

A switch or circuit breaker
rated 1.0 A, 250 VAC, with
a minimum terminal spac ing
of 3.0 mm must be attac hed
to the monitor’s AC power
leads. This switch must also

proximity to the monitor,
and be in easy reac h of the
operator. This switch sho uld
also be clearly marked as

disconnect device.

WARNING: Electrical inst al lat ion s h ou ld be p erf ormed by a certified elec tric i an, an d s hou ld
comply with all applicable NEC/CEC and loc a l electr ic al saf et y codes.

WARNING: The AC power ground wire must first be connected to the monitor’s ground
stud. Under no circum stances s hould this m onitor be operate d wit hout a prot ecti ve groun d.
Doing so poses a potential shock hazard, and is also a violation of electrical safety
standards applicable to this type of equipment.

Figure 2-7. AC Power Connections

WARNING: Copper conductors for connection to supply mains must be made in

accordance with NEC/CEC and loca l codes .

CAUTION: Drilling holes in the SZ enclosure may damage the unit and will void the
warranty. Please use knockouts provided for electrical connections.

P/N: 3015-4256 Rev 13 13

Single Zone Gas Monitor

2.7. Connecting External Alarms

2.7.1. Overview

The SZ monitor includes four SPDT rela ys whose contacts are rated 2 A at 250 VAC (inductive) and 5 A
at 250 VAC (resistive). These relays are used for the connection of external alarm devices that are
activated when the rela y is energized. The relays are factor y assigned to energi ze under the following
conditions:

Relay #1 Leak Alarm Point 100 ppm
Relay #2 Spill Alarm Point 300 ppm
Relay #3 Evacuate Alarm Point 500 ppm
Relay #4 Fault System Fault Event

NOTE: Alarm points of relays #1, #2, and #3 are set using the monitor’s LEAKLVL,
SPILLLVL, and EVACLVL function screens (page 22).

2.7.2. Connection

Use any of the ser vice knockouts to g ain cable acc ess to the interior of the monitor. Loca te the Exter nal
Alarm Relay Connec tor (page 11). Secure the leads fr om the ex ternal alarm devi ce and its power s ource
to the connector as shown in the diagram below.

Figure 2-8. External Alarm Relay Connector

Each relay may be connected as normally open (NO), or normally closed (NC).
The relay contacts are rated 2 A at 250 VAC (inductive) and 5 A at 250 VAC (resistive).
Power for the alarm devices connec ted to the relay contacts may be supp lied by an external 24 V DC

power source or the monitor’s AC input terminals.
In Figure 2-9, power to this device is bei ng tapped off the monitor’s AC input. In Figure 2-10, power is

supplied from an external power source

14 P/N: 3015-4256 Rev 13

Single Zone Gas Monitor

Figure 2-9. Typical AC External Alarm Relay 1 Wiring

Figure 2-10. Typical DC External Alarm Relay 1 Wiring

P/N: 3015-4256 Rev 13 15

Single Zone Gas Monitor

Jumper the ‘Live/Positive’ line of an ex ternal power source (DC devices) or the monitor’s AC input (AC
devices) to the ‘Common’ terminal on the relay connector.

Connect the ‘Live/Positive’ end of the strob e or horn to the ‘NO’ terminal of whic hever level of alarm is
appropriate for the application.

For protection, install an in-line fuse of the appropriate size and design for the external alarm device being
used.

The other end of the strobe or horn is connected to the ‘Neutral/Negative’ leg of the external power
source (DC devices) or monitor’s AC input (AC devices).

2.8. 4–20 mA Current Loop Interface

An external 4–20 mA m onitoring d evice (e. g., char t recor der) c an be connec ted to the SZ monitor using a
shielded-twisted-pair cable. Use any of the s ervice k nockouts to gain acces s to the inter ior of the monitor.
Locate the 4−20 mA Connec tor (page 11), remove it from the circuit board, and then rem ove the resistor
or shorting wire from its terminals.

IMPORTANT! The monitoring device must be isolated from ground (floating).

NOTE: A 100 Ohm, ¼ W resistor must be connected to the 4–20 mA connector if no

external monitoring device is used. Failure to install this resistor m ay cause a loop fault
code <0010> to occur (page 23).

Secure the wire leads from the external monitoring device to the 4–20 mA connector as shown in the
diagram below, making sure that the polarity at this connector matches the wiring at the monitoring
device.

The default current-to-ppm factor is set to 0.016 mA = 1 ppm, providing a meas urement range 0 ppm
(4 mA) to 1,000 ppm (20 m A). Note that the current-to-ppm factor can be changed using the monit or’s
LOOP function (page 22).

To facilitate loop zero and s pan c hec k ing, not e t hat when the LOOP function is selected the loo p outp ut is
set to 20 mA, and upon exiting this function the loop output is set to 4 mA.

Figure 2-11. 4–20 mA Current Loop Connector

CAUTION: Never app ly power to the 4–20 mA Current Loop Con nector from an external

power supply. Connect only a load resistor and/or a floating measurement device.

16 P/N: 3015-4256 Rev 13

SECTION 3. OPERATION

Keypad

any of three preset alarm points.

Display Screen

3.1. Front Panel Display and Controls

Single Zone Gas Monitor

Use these buttons to:

1. Enter function mode, then move
arrow (>) on screen to the desired
function

2. Scroll through data

3. Change a function’s value
Monitor On LED (Green)

Flashes during warm-up
Lights steady during normal operation

System Fault LED (Yellow)
Flashes when one or more faults occur

Alarm LED (Red)
Flashes when detected gas leve l exceeds

Figure 3-1. Front Panel Display and Controls

Displays current readings, menus, and
parameters.

Enter Button

Press this button to:

1. Clear peak reading

2. Save a function screen’s displayed value

Silence/Quit Button

Press this button to:

1. Acknowledge a system fault or gas alarm by
turning OFF the internal audible alarm and
de-energizing the corresponding fault/alarm
relay.

2. Return to the previous screen without saving
data when in the function mode.

P/N: 3015-4256 Rev 13 17

Single Zone Gas Monitor

Once the SZ monitor has been inst alled, set up, and p owered ON, the
gas without further operator intervention. The results of those

3.2. General Operation

monitor will make measurements in the area being sampled for desired

MEASURE 00485 pk
45ppm R134A

measurements are shown on the front panel display.
In the example shown abo ve, MEASURE indica tes that the SZ unit is actively monitoring for refrigerant

gas, and that currentl y 45 ppm of R-134A (refrigerant gas) is being detec ted. This displa y also indicates
that a peak measurement of 485 ppm has been made.

An operator can reset the peak value to zero by pressing the ENTER button.
A log of up to 200 previous measurements can be viewed using the PPM LOG function (page 22).
If the detected gas level exceeds the preset Leak, Spill, or Evacuate alarm point, then the monitor

responds by turning ON the f ront panel ALARM (red) light and energi zing the corres ponding al arm r elay.
If the internal audible alarm is turned ON, it too will activate (AUDALRM page 22). Optional external
alarm devices can be connected to the alarm relays to alert personnel that a Leak, Spill, or Evacuate
alarm condition has occur red (page 14). Pressing the front panel SILENCE b utton will acknowledge an
alarm and turn OFF all alarm indicators with the exception of the front panel ALARM light. The alarm
circuit will reactivate, however, if the alarm condition is not cleared within the time period set by the
SILENCE function (page 22). The ALARM lig ht will turn OF F after the detected gas level goes below the
lowest alarm point and after the SILENCE button is pressed.

If a system fault occurs ( see Fault Code list on page 23) , the monitor responds by turning ON th e front
panel SY STEM F AULT (yellow) light and e nergizing the f ault relay. If the i nternal audib le alarm is tur ned
ON, it too will activate ( AUDALRM page 22). An optiona l external alarm device can be connec ted to the
fault relay to alert personnel that a system fault has occurred (page 14). Pressing the front panel
SILENCE button will acknowledge the fau lt and turn OFF all alarm indicators w ith the exception of the
front panel SYSTEM FAULT light. The alarm c ircuit will reactivate, however, if the fault condition is no t
cleared within the t ime period set by the SILENCE f un ction ( page 22). The SY STEM FAULT light will turn
OFF only after the cause of the fault has been eliminated.

A log of the a larm and fault events can be viewed using the monitor’s ALARMS and FAULTS function
(page 22).

18 P/N: 3015-4256 Rev 13

3.3. Display Screens

During normal operation, the Data Display screen shows when the

4A (refrigerant gas), and that a peak

SQUELCH CAL

LOOP CLOCK

0ppm R134A

0ppm R134A

0ppm R134A

VERSION x.xx

ALARMS DIAGNOS

LEAKLVL EVACLVL

3.3.1. Initial Power Up

Single Zone Gas Monitor

When the SZ monitor is f irst po wered u p all f ront pane l lig hts are t urned
ON, and a splash screen appears showing the monitor’s firmware
revision level. After a brief moment the Warm Up screen is display
along with the front panel MONITOR ON light (green) blinking.

The monitor takes 15 m inutes to warm up; after which, the MONITOR
ON light glows steadily and the Data Display screen is displayed.

BACHARACH

WARM UP

3.3.2. Data Display Screen

monitor is performing the following three functions:
MEASURE indicates that the m onitor is activel y measuring for selec ted

gas. In the example screens shown above, the monitor is currently
detecting 0 ppm of R-13
measurement of 485 ppm has occurred.

To reset the peak value to zero, press the ENTER button.
PURGE is displayed wh en the monitor is resetting its infrared detec tor

to a baseline of 0 ppm using fresh (zero) air that is being drawn in
through the Purge Air Inle t Port. This purging process is performed on
an “as needed” basis, which is normally once every 6 to 8 minutes.

PRES CHK is displayed when the m onitor is perf orming an atmospher ic pr es sur e c heck, which is done to
ensure the accuracy of the gas measurem ent under va rying atm ospheric condit ions . T his pressur e check
is performed ever y 30 minutes.

MEASURE 00485pk

PURGE 00485pk

PRES CHK 00485pk

3.3.3. Function Screens

The Function screens are used to display stored data and to set up the monitor.
From the Data Display screen, press any Keypad button to display the first Function Menu screen.

Next, use the Keypad buttons to move the arro w (>) on th e displa y until it is nex t to the des ired func tion,
and then press the ENTER button to select that function.

>PPM LOG FAULTS

>GASTYPE SPILLVL

Once a function has been s elected, use the Keypad t o scroll through the displa yed data or to change a
parameter associated with that function. Press ENTER to save newly entered parameters. Press the
QUIT button to return to the previous screen without saving.

Note that if no buttons ar e pres sed within 90 sec onds after s electing a f unctio n, the m onitor returns to the
Data Display screen.

>LOG INT AUDALRM

>SILENCE ZONETMP

>P-CHK

P/N: 3015-4256 Rev 13 19

Single Zone Gas Monitor

ve been recorded, the newest record

0100 PPM

R134A

0.00002au 4.260v

24.5cD 14.00psi

11/10/10 12:37

11/10/10 15:06

11/07/10 15:35

PPM LOG – Contains records of the last 200 measurements. Each

record shows the m easurement’s date, time, and pp m level. Note that
the interval at which the measurem ents are logged is determined b y the
LOG INT function.

Use the Keypad Up and Down buttons to change the rec ord num ber b y
a factor of 1. Use the Right and Left buttons to change the record
number by a factor of 10. Press QUIT to return to the previous screen.

In the example on the right , record #025 shows th at a level of 425 ppm
was measured on 11/07/10 at 15:35.

Note that the PPM Log can be cleared as described on page 25.

ALARMS – Contains records of the last 30 alarm events, with the

monitor’s most r ecent alarm being sh own whe n the Alarm screen is first
displayed. After 30 events ha
overwrites the oldest. Each record displays either LEAK, SPILL, or
EVAC including the date and time the alarm occurred. Use any of the
Keypad buttons t o s cr ol l th rough the other alarm recor ds . Pres s QUIT to
return to the previous screen. Refer to page

Note that the ppm levels at which alarms occur are set using the
LEAKLVL, SPILLLVL, and EVACLVL functions.

In the example on the right , r ecord #03 s hows th at a spil l event occurr ed
on 11/10/10 at 15:06.

22.

#025 425PPM @

#03 SPILL @

FAULTS – Contains records of the last 30 fault events, with the

monitor’s current fault s tatus being shown when th e Fault screen is first
displayed. After 30 events have been recorded, the newest record
overwrites the oldest. Each record lists an event’s numeric fault code
plus the date and time the fault occurred. Use any of the Keypad
buttons to scroll through th e other fault records. Pres s QUIT to return to
the previous screen. Refer to System Faults (page 23).

In the example on the right, rec ord #15 shows that a Purge Flow Fault
<1000> occurred on 11/10/10 at 12:37.

DIAGNOS – Enters the diagnostic function. Press the Up Arrow

Keypad b utton to toggle between the m onitor’s two diagnostic scr eens.

Refer to (page 26).

GAS TYPE – Used to select of any one of the gas types listed for

monitoring. (See the gas library in the Specifications section.) Use the
Keypad to select the desired gas type, and the n press ENTER to save
the selection and return to the previous screen.

LEAKLVL – Sets the Leak Alarm level, adjustable f rom 1 to 300 ppm .

Factory default is 100 ppm. Note that the Leak Alarm level cannot be set
higher than either the Spi ll or Evacuate Alarm levels. Refer to Append ix
for recommended alarm s ettings for other gases . Use the Keypad to set
the desired Leak Al arm level, and th en press ENTER to save that level
and return to the previous screen.

#15 <1000> @

4.26500v <0000>

0.4ppm 0.00

SELECT GAS TYPE

EDIT LEAK LEVEL

20 P/N: 3015-4256 Rev 13

Single Zone Gas Monitor

0300 sec

11/10/10 15:30

OFF

0.016 ma/PPM

0010 min

0500 PPM

0300 PPM

SPILLLVL – Sets the Spill Alarm level, adjustable from no lower than

the Leak Alarm level to a maximum value of 500 ppm, but not higher
than the Evacuate Alarm level. Factory default is 300 ppm. Refer to
Appendix for recommended alarm settings for other gases. Use the
Keypad to set th e desired Spill Alarm level, and then pr ess ENTER to
save that level and return to the previous screen.

EVACLVL – Sets the E vacuate Alarm level, adjusta ble from no lo wer

than the Spill Alarm level to 9999 ppm. Factory default is 500 ppm.
Refer to Appendix for reco mm ended alarm s ettings f or other g ases. Use
the Keypad to set the desired spill level alarm level, and then press

ENTER to save that level and return to the previous screen.

LOG INT – Sets the interval at which measurements are logged to

memory from 1 to 9999 m inutes. F ac tor y def ault is 10 minutes. Note that
the logged meas urements can be vie wed using the PPM LOG function.
Use the Keypad to enter the desired value, and th en press ENTER to
save that value and return to the previous screen.

LOOP – Adjusts the loop factor of the 4–20 mA current loop. Factor y

default is 0.016 mA per ppm, which provides an o utput range of 0 ppm
(4 mA) to 1,000 ppm (20 mA). Use the Keypad to set the desired loop
factor, and then press ENTER to save that value and return to the
previous screen.

To facilitate loop zero and span checking, note that when the LOOP
function is selected the loo p outp ut is s et t o 20 mA, and upon exiting t his
function the loop output is set to 4 mA.

EDIT SPILL LEVEL

EDIT EVAC LEVEL

LOG INTERVAL IS

EDIT LOOP FACTOR

AUDALRM – Allows the monitor’s internal audible alarm to be

associated with any function of the m onitoring system . Factor y default is
OFF. Use the Keypad to selec t the desired audible al arm function, and
then press ENTER to save that value and return to the previous screen.

Audible Alarm Settings: OFF, ANY ALARM, SYSTEM FAULT, LEAK ALARM,
SPILL ALARM, EVAC ALARM, MONITOR STOPPED

NOTE: MONITOR STOPPED indicates there is a critical
system fault, and the monitor is no longer functioning
correctly.

CLOCK – Sets the monitor ’s date and time. Use the Keypad to enter

the correct date and tim e, and then press ENTER to save those values
and return to the previous screen. Note that time is displayed in a
24 hour format, while the date is displayed as mm/dd/yy.

SILENCE – Used to enter a length of time for which the internal

audible alarm and the external alarm are turned OFF when the front
panel SILENCE button is pressed. The factory default is 300 seconds
(5 minutes). If the cause of the alarm/fault has not been cle ared at the
end of this time peri od, the internal audib le alar m and the extern al al arm
device are reactivated. U se the Keypad to enter the d esir ed time period,
and then press ENTER to save that value and return to the previous
screen.

AUDIBLE ALARM IS

SET DATE & TIME

SILENCE TIMEOUT

P/N: 3015-4256 Rev 13 21

Single Zone Gas Monitor

e in psia, along with the

11/10/10 15:06

0.0

1.000

25 degC

50.0ppm

SQUELCH – Sets a value of between 0 .0 and 99.9 ppm that prevents

the display of meas urements below that value. Fact ory default is 0 ppm .
For example, if the sque lch setting is set to 50 p pm, then the monitor will
not display meas urem ents that are below that v alue. Use the Keypad to
enter the desired value, and then pres s ENTER to save that value a nd
return to the previous screen.

ZONETEMP – Used to enter the temperature of the area being

monitored in °C, thus givin g a more accurate ppm r eading. The factory
default is 25°C. Use t he Keypad to e nter the desired tem perature, and
then press ENTER to save that value and return to the previous screen.

CAL – Us ed to change the monitor’s cal ibration factor. This func tion is

to be used ONLY with instructions from a Bacharach Service Center.
Factory default is 1.000.

P-CHK – This Pressure Check function displays the current manifold

pressure and the stored ambient pressur
difference between these two pressures and the current fault code.

SQUELCH BELOW

TEMP AT ZONE =

R134A CALFACTOR

14.72 * AMB14.81

3.4. Gas Alarms

3.4.1. Overview

If the selected gas ppm level in the area being monitored exceeds its preset Leak, Spill, or Evacuate
Alarm level (page 22), the SZ unit will detect this alarm condition and turn ON the front panel ALARM
light. Additionally, an external alarm device may activate and the monitor’s int ernal audible alarm may
sound if those features have been enabled (pages 14 and 22).

3.4.2. Cl earing / Silencing a Gas Alarm

Once the gas-alarm circuit has been triggered all alarm indicators remain turned ON, even after the
detected gas level ret urns t o norm al. Pres s th e SILENCE butto n to c lear al l gas -alarm indicators after the
cause of the alarm has been cleared and the detected gas level has dropped below all alarm levels.

Pressing the SILENCE button while a gas-alarm condition still exists causes th e internal audible alarm
and all external alarm devices that ar e connected t o the relays to tur n OFF for a period of tim e as set by
the SILENCE function (page 22). This will allow ventilatio n equipment tied to the SPI LL and E VAC r ela ys
to continue operatin g. The f ront panel ALARM l ight re mains O N, however, as an ind ication t hat an a larm
condition still exists, but w ill automatically turn OFF once the gas le ve l retur ns to nor mal. The alarm circuit
will reactivate at the end of the silence period if the detected gas level is still above an alarm level.

3.4.3. Viewing the Gas Alarm Log

From the Data Display screen, use the Keypad butt ons to place th e arrow (>) on the displa y next to the
ALARMS function. Then press ENTER to display the alarm log.

The alarm log shows the type of alarm (LEAK, SPILL, or EVAC), plus t he date and time it occurred. If
CLEAR is displayed, this indicates that an alarm was acknowledged at the date and time shown.

Immediately after selecting the ALARM function, the most recent alarm event is displayed. In the example
below, record #03 shows that a Spill Alarm occurred on 11/10/10 at 15:06. Note that if more than
30 alarm events have occurred, then the newest event overwrites the oldest. The Alarm Log can be
cleared as described on page 25.

#03 SPILL @

22 P/N: 3015-4256 Rev 13

Single Zone Gas Monitor

11/12/10 08:17

12 ZONE FLOW

13 PURGE FLOW

11/12/10 08:30

3.5. System Faults

3.5.1. Overview

If a system malfunction occurs, the SZ monitor will detect the problem and turn ON the front panel
SYSTEM FAULT light. Additionally, an external alarm device may activate and the monitor’s internal
audible alarm may sound if those features have been enabled (pages 14 and 22).

3.5.2. Cl earing / Silencing a Fault Alarm

The SY STEM F AULT light and all other f ault indicators will autom atically turn OFF af ter the cause of the
fault has been eliminated.

Pressing the SILENCE butt on while a fault condition st ill exists c auses the intern al audibl e alarm and the
external alarm device that is connected to the fault relay to turn OFF for a period of time as s et by the
SILENCE functi on ( page 22). The front panel SYSTEM FAULT light rem ains O N, however, as a reminder
that a fault condition still exists. The alarm circuit will reactivate at the end of the silence period if the
cause of the fault has not b een c or rec ted . The SYSTEM FAULT light will automatically turn OFF once t he
fault has been cleared.

3.5.3. Viewing the Fault Log

From the Data Display screen, use the Keypad butto ns to place the arrow (>) o n the display next to t he
FAULTS function. Then press ENTER to display the fault log.

#03 <0800> @

#04 <0000> @

FAULT CODE<1800>

FAULT CODE<1800>

Note that the Fault Log can be cleared as described on page 25.

The fault log shows the monitor’s current fault status. If the fault is still
present when the FAULTS function is selected, then the curr ent cause of
the fault is displa yed along with the d ate and t im e it occ urred. If the cause
of the fault has be en cleared, then the fault log will show <0000> along
with the date and time the fault was cleared. Use the keypad buttons to
scroll through the fault lo g. In the examples shown to the left, record #03
shows that a Zone F low Fault (fault code <080 0>) occurred on 11/12/10
at 08:17, while record #04 shows that the f au lt was c l eared on 11/12/10 at
8:30.

The cause of the fault is identif ied by a numeric fault code. To c onvert the
fault code into a text descriptio n of the fault, firs t press the ENTER button
and then use the Keypad buttons to scroll through the display until the
text description of the fault appears. If the fault c ode is a combination of
two or more faults, t hen continue to use the Keypad buttons until all f ault
text descriptions have been displayed. For example, the fault code
<1800> represents the co mbination of both a Zone Flow <0800> and a
Purge Flow <1000> fault as shown to the left.

P/N: 3015-4256 Rev 13 23

Single Zone Gas Monitor

to check the Box

3.5.4. Fault Codes

FAULT CODES ARE ADDIT IVE. For example: A fault code of <1800> indicates that both a Purge Flow

Fault <1000> and a Zone Flow Fault <0800> have occurred.

Code Name Description

<0001> Box Temperature

Fault

<0002> Bench

Temperature Fault

<0004> Manifold Pressure

Fault

<0010> Loop Fault The 4–20 mA current loop is open, or t here is a high resistance in the

<0100> Zero Filter Fault There is gas present in the purge air. Loc ate the m onitor in an area

<0200> Gain Set Fault The digipot autotune sequence has failed. T his fault will only occur

<0400> A/D Fault A fault has occurred in the analog-to-digital circuitry. Contact the

<0800> Zone Flow Fault Check for:

<1000> Purge Flow Fault Check for:

<4000> Zero Fault The IR detector’s output voltage is out of tolerance. Enter the

<8000> Clippi n g Faul t

Enclosure temperatur e is outside normal range (or IR detect or has
failed). Check that the monitor is not being subjected to extreme
temperatures. Verify that the ventilation holes are not obstructed.
Use the DIAGNOS function (page 26

)

Temperature.
Optical bench is ou tside norm al operating range (or IR detector has

failed). Check that the monitor is not being subjected to extreme
temperatures.

The manifold pressure is outside normal operating range (or IR
detector has failed). Enter the DIAGNOS function (page 26) and
record ALL data. Call the factory with this information for further
instructions.

circuit. Check the wiring to the load/monitoring circuit. If this feature is not
being used, a 100 ohm resistor must be connected to the 4–20 mA
connector (page 16).

containing fresh air, or install a purge air line. Refer to page 7.

on first boot up or after a firmware upgrade. Call the factory for
further instructions.

factory with this information for further instructions.

A kink in the gas-sample line or exhaust line; a blocked external
termination filter; a blocked internal hydrophobic filter (page 11); a
failed pump.

A kink in the purge line; a blocked external termination filter; a
blocked internal hydrophobic filter (page 11); a failed pump. Once
the blockage has been cleared, the monitor will return to normal
operation after the monitor completes a purge cycle.

DIAGNOS function (page 26) and record A LL data. Call the factory
with this information for further instructions.

The detector voltage may be out of tolerance. Use the DIAGNOS
function (page 26) to check the IR detector voltage. Call the factory
with this information for further instructions.

24 P/N: 3015-4256 Rev 13

Single Zone Gas Monitor

0.09dif <0000>

3.6. Clearing the Stored PPM Log, Alarm and Fault Data

Up to 200 gas measurements, and 30 alarm and fault events are stored by the monitor.
To clear stored data, first display the data to be cleared by using the PPM LOG, ALARMS or FAULTS

function (page 22). N ext, pr ess the Right Arrow Keypad and ENTER buttons at t he sam e tim e. A single,
long tone should be heard when the data has been successfully cleared.

3.7. Reset to Factory Default Settings

IMPORTANT! Perform ing this function will delete all program parameters , alarms, faults,

and ppm log files.

With AC power rem oved from the monitor, press an d hold down the Factory Default S witch (pages 10
and 11). Apply AC power and listen for a beep and then a long tone. Re lease switch. At this time the
monitor will purge the IR bench and auto set the IR detector voltage to its baseline 0 ppm value.

After warming up, reprogram the SZ monitor to the desired settings as needed.

3.8. The P-CHK Function

3.8.1. Overview

The P-CHK function (Pressure Check Function) (page 22) is useful to a service technician for
troubleshooting a flo w fault probl em . The m onitor will trigg er a f low fault if the press ure drop f rom am bient
is less than 0.02 psi during a purge cycle, and 0.06 psi during a measurement cycle.

3.8.2. Keypad Functions

From the Data Displa y sc reen, use the Keypad butt ons to place the arro w (>) on the dis play next to the
P-CHK function. Then press ENTER to display the Pressure screen.

The Left Arrow Keypad button toggles the purge valve open and closed. Note that an asterisk (∗)
appears when the purge valve is open (purging).

The Down Arrow Keypad button toggles the pump ON and OFF.
Pressing the ENTER button stores the current manifold pressure shown on the left to the ambient

pressure shown on the right (must be done with the pump OFF).

3.8.3. Screen Display

14.72 * AMB14.81

Manifold Pressure – Current manifold pressure in psia.
Stored Ambient Pressure – Stored ambient pressure in psia.
Pressure Difference – The difference between the current manifold pressure and the stored ambient

pressure.

Manifold Pressure ∗ Stored Ambient Pressure
Pressure Difference Fault Code

Fault Code – Current fault code (page 23).
Purge Valve Asterisk (∗) – W hen viewing the Pressure s creen, the purge valve can be opened and

closed by pressing the Left Arrow Keypad button. An asterisk appears on the display when the purge
valve is open.

P/N: 3015-4256 Rev 13 25

Single Zone Gas Monitor

24.5cD* 14.72psi

Bench Voltage Fault Code

29.5cB* 14.72psi

Noise Fault Code
Box Temperature °C ∗ Manifold Pressure

0.00002au*4.260v

PPM Level µMole/Liter
Avg. Absorption Unit ∗ Detector Voltage

3.9. The DIAGNOS Function

3.9.1. Overview

The DIAGNOS function displays sensor data and status information useful to a service technician for
troubleshooting various fault conditions. Explanations of the data shown in these screens are given
below.

3.9.2. Keypad Functions

From the Data Display screen, use the Keypad butt ons to place th e arrow (>) on the disp lay next to the
DIAGNOS function. Then press ENTER to display the first of two Diagnostic screens.

Press the Up Arrow Keypad button to toggle between the First and Second Diagnostic screen.

3.9.3. First Diagnostic Screen

4.26500v <0000>

0.00250n <0000>

Detector Temperature °C ∗ Manifold Press ur e

In the first diagnostic screen, the user can toggle between displaying the Bench Voltage / Noise and
Detector Temperature / Box Temperature by pressing the Right Arrow Keypad button.

Bench Voltage – This is the current peak-to-peak output of the IR detector. In the a bsence of gas this
value can range from 3.90000V to 4.50000V.

Noise – T he Noise value is a 16 point running a verage of the noise portion of the IR detector’s output.
This reading is valuable mainly when refrigerant is NOT present.

Detector Temperature – This is the current detector temperature in °C.
Box Temperature – This is the current internal enclosure temperature in °C.
Fault Code – Current fault code. A value of <0000> indicates that no faults are being detected.
Manifold Pressure – Current manifold pressure in psia.
Purge Valve Asterisk (∗) – The purge valve can be opened and closed by pressing the Left Arrow

Keypad button. An asterisk appears on the display when the purge valve is open.

3.9.4. Second Diagnostic Screen

0.4ppm 0.00

PPM Level – Parts Per Million Level is the c urrent detected gas leve l, and is the volume conc entration
referenced to standard temperature and pressure.

Average Absorption Unit – This is the optical absorbency. In the absence of gas the absorbency is

0.00000 au. When sampling selected gas, its value varies proportionally with the concentration.

µMoles/Liter – This is the absolute concentration in micro-moles per liter of gas.
Detector Voltage – This is a running averag e of the IR detector’s bench v oltage as displa yed in the First

Diagnostic screen.
Purge Valve Asterisk ( ∗) – W hen viewing the diagnostic screen, th e purge valve can be opened and

closed by pressing the Left Arrow Keypad button. An asterisk appears on the display when the purge
valve is open.

26 P/N: 3015-4256 Rev 13

Single Zone Gas Monitor

1.000

3.10. The Calibrati on Function

3.10.1. Overview

If greater than standard accuracy is desired, the factory’s default calibration factor of 1.000 may be
adjusted by performing the calibration procedure as described below, and then selecting the monitor’s

CAL function to enter the new calibration factor.

IMPORTANT! Cha nging the c alibration fac tor will VOID the factor y calibration. T ypically, the

monitor will remain within the factory-calibrated accuracy indefinitely and no calibration is
required. Complex software algorithms adjust for temperature drift, IR source aging, and

3.10.2. Calibration Procedure

The calibration factor is det ermined by sampling a known di lution of gas. The sample must be prepar ed to
less than half the desir ed ac curac y and the conc entrat ion m ust be c orrec ted for am bient tem per ature and
pressure at the time of measurement.

Calibration is best performed at or near full scale, it can however, be done at any concentration and
ideally in the range where maximum accuracy is desired down to, but not below, 100 ppm.

pressure changes in order to keep the unit within factory accuracy specifications.

A cylinder of a certif ied calibration gas must be used to ensure sampling occurs at am bient conditions.
A minimum sample size of 5 liters is required.

The SZ unit should be operating for at least one hour prior to performing a calibration.
Prepare the SZ for sampling b y us ing t h e CAL function to s et t he c al ibrat ion factor to 1.000. Also, use the

LOG INT function to set the log interval to 1 minute.
With the SZ monitor operating normally, connect the gas-sample bag directl y to the gas-inlet port and

allow the monitor to sample the entire bag. When sampling is complete, view the logged ppm values
using the PPM LOG function. If the bag was large en ough f or m ultiple s am ples, average the m ost stable
ones. The new calibration factor is computed by dividing the known gas concentration value by the
measured value. Typically this number will be between 0.95 and 1.05. Use the CAL function as
described below to enter the new calculated calibration factor.

3.10.3. Adjusting Calibration Factor

From the Data Display screen, use the Keypad butt ons to place th e arrow (>) on the disp lay next to the
CAL function. Then press ENTER to display the Calibration screen.

R134A CALFACTOR

With the Calibration screen displayed, use the Keypad buttons to enter the new calibration factor.
Press ENTER to save this value.

P/N: 3015-4256 Rev 13 27

SECTION 4. MAINTENANCE

During normal operation, the Single Zone monitor performs a purge cycle during

Replace the charcoal filter ( P/N 3015-3125) about every 6 months, when a zer o filter fault occurs (fault

4.1. Warnings and Cautions

WARNING: Shock Hazard! Always disconnect AC power before working inside the

monitor.

WARNING: Before performing any operation or m aintenance, verify connection of the AC
power ground wire to the monitor’s ground stud. Under no circumstances should this
monitor be operated or serviced without a protective groun d. Doing so poses a potential
shock hazard and is also a violation of elec trical saf ety standards applica ble to t his t ype of

4.2. Charcoal Filter (Halogen Gas Monitor Only)

equipment.

WARNING: Electrical installation shou ld be performed by a certified electrici an and must
comply with all applicable NEC/CEC and local electrical safety codes.

CAUTION: When working inside t he m onitor, be ver y car eful not to disl odge a ny electrica l
wiring or pneum atic tubing. The SZ monitor contains sensiti ve electronic components that
can be easily damaged. Be careful not to touch or disturb any of these components.

Single Zone Gas Monitor

which fresh air is dra wn in from the purge line to flu sh internal components of any
residual refrigerants. Purge lines should draw in fresh outside air to perform the
purge function. W hen access to outdoor air is impractical, purge lines may begin
indoors, however a charcoal filter must be used on th e purge line to ensure that no
contaminated air is dr awn into the system during pur ge cycles. The charcoal filter
(which is mounted outside of the enclosure using the included bracket) removes
refrigerant gas from the purge-air stream during the internal purging process.

Use upgrade kit 3015-5716 to convert an SZ with internally mounted filt er to an SZ with an externa l filt er.

code <0100>), or after the monitor itself has been exposed t o unusually high levels of refrigerant gas,
such as after an evacuation alarm.

4.3. Hydrophobic Filters

Hydrophobic Filters (see Figure 2-5 on page 11 and Figure 2-6 on page 12) located in both the gas­sample and purge lines prevent water from entering the IR det ector. A zone flow fault will occur (fault
code <0800>) if the gas-sample filter becomes blocked, while a purge flow fault will occur (fault code
<1000>) if the purge filter becomes blocked. Replace the appropriate filter as required (P/N 0007-1650).

4.4. Servicing Air Lines and Termination Filt e rs

The gas-sample line and the optional purge and exhaus t lines should be periodically c heck ed f or obvious
signs of kinks, damage, and contamination. Replace the tubing as required.

The gas-sample line and purge-line termination filters prevent dust and dirt from entering the monitor.
Both of these filters should be periodically checked and replaced when there are obvious signs of
contamination. A zone flow fault will occur (fault code <0800>) if the gas-sample line filter becomes
blocked, while a purge flow fault will occur (f ault c od e <10 00>) if the purge-line f ilt er becomes blocked. To
service the filter, simply remove it from the line and replace it with a new one (P/N 3015-3420).

External Filter Includes

Mounting Bracket

P/N: 3015-4256 Rev 13 28

Single Zone Gas Monitor

4.5. Fuses

The SZ monitor is protected from electrical damage by two, 1 A, 250 V, type “F” fuses (page 11).
Carefully remove the f uses from their fus e clips and visuall y inspect each fuse for dam age. Replace the
fuses as required (P/N 0004-2620).

4.6. Sample Pump

The Sample Pump (page 11) draws the gas sample into the monitor, through the IR detector, and
discharges the sample out the monitor’s exhaust port. W hen replacing the pump, remove its inlet and
outlet tubing, disconnec t th e AC po wer wires fr om the pum p itself, and r em ove pum p from m onitor. Ins tall
a new sample pump (P/N 3015-5176).

4.7. End-of-Line Water Stop (Optional)

The end-of-line water stops (P/N 3015-5512) prevent contaminates and moisture from entering the
monitor. This filter should be checked regularly and replaced when signs of contamination are obvious.

4.8. Water Trap (Optional)

The water trap rem oves moistur e that en ters tubin g befor e allowing it to enter the interna l com ponents of
the SZ unit. The water trap should be em ptied often as condensate accum ulates. The water trap filter
should be periodically checked and replaced when there are obvious signs of contamination.

4.9. Clock Battery

The Clock Battery (page 11) maintains the correct date and time when AC power is not applied to the
monitor. Replace this battery about every 5 years (P/N 0204-0020).

P/N: 3015-4256 Rev 13 29

Single Zone Gas Monitor

4.10. Replacement Parts and Optional Accessories

REPLACEMENT PARTS P/N OPTIONAL ACCESSORIES P/N

General P/N General P/N

HGM-SZ complete assembly 3015-4200 Splitter Kit (2-way) 3015-5404
AGM-SZ complete assembly 3015-4280 Splitter Kit (3-way) 3015-5405
Panasonic CR2032, 3V Battery 0204-0020* Variable Flow Regulator 3015-3849
Fuse: 1.0 A, 250 V, Type “F” 0004-2620 Annual Maintenance Kit 3015-5529
IR Bench Replacement Kit (HGM) 3015-4572
IR Bench Replacement Kit (AGM) 3015-4492 120 V 3015-4121
Display Board 3015-5520 230 V 3015-5530
Universal Power Supply 3015-5523 4-20 mA 3015-4123
Power Entry PC Board 3015-5524
Main PCB Board Replacement 3015-5478 Water Trap, Manual Drain 0007-1655
Replacement Pump 3015-5176 Replacement Filter 0007-1656

Filters P/N

Charcoal, Zero
Air (HGM Only)

If external, use… 3015-3125 End of Line Water Stop Filter 3015-5512

If internal, use… 3015-5716**
Hydrophobic 0007-1650
Termination, Line End Assembly (gas

sample line)

3015-3420

Line End (Filter Only) 3015-2906 Panel Mount 3015-5491

Tubing P/N

¼ in OD - (for HGM) by the foot 0304-2743 Panel Mount 3015-5493
¼ in OD - (for AGM) by the foot 0304-2742

* See Warning below.
** 3015-5716 is a conversion kit for older-style internal filters

R-134a 3015-3437
R-123 3015-3438

Surge Protectors P/N

Water Traps and Options P/N

Mounting Bracket 0007-1657

Alarms P/N

120 VAC 3015-3076

Audible/
Visual

Audio
Alarm

9-28
VDC

9-28
VDC

Surface Mount 3015-5490

Surface Mount 3015-5492

Gases P/N

R-22 3015-3850

Gas Cylinder 1031

R-134a 3015-3851

(100 PPM)

R-123 3015-3852

R-22 3015-3430
Gas Verification
Kit

WARNING: In compliance with agency appr ovals and safet y regulations, the batter y must
be replaced with the specified Bacharach replacement part.

30 P/N: 3015-4256 Rev 13

Single Zone Gas Monitor

4.11. Service Centers

Replacement parts a nd service can be obtained by c ontacting one of the following Bac harach Service
Centers.

United States

Bacharach, Inc.
621 Hunt Valley Circle
New Kensington, PA 15068-7074
Phone: [phone]
Fax: [phone]
Email: [e-mail]

Canada

Bacharach of Canada, Inc.
20 Amber Street Unit #7
Markham, Ontario L3R 5P4 Canada
Phone: [phone]
Fax: [phone]
Email: [e-mail]

Europe

Murco Limited – a Bacharach Company
114a Georges Street Lower
Dun Laoghaire
Co. Dublin
Ireland
Phone: [phone]
Fax: [phone]
Email: [e-mail]

P/N: 3015-4256 Rev 13 31

Single Zone Gas Monitor

APPENDIX A. DATA TABLES

A.1. Recommended Alarm S et t ings

Refrigerant Leak PPM Spill PPM Evacuate PPM

R11 100 300 500
R12 100 300 500
R22 100 300 500

R23 100 300 500
R113 100 300 500
R114 100 300 500
R123 25 35 50
R124 100 300 500

R134A 100 300 500
R401A 100 300 500
R402A 100 300 500
R402B 100 300 500
R404A 100 300 500
R407A 100 300 500
R407C 100 300 500
R409A 100 300 500
R410A 100 300 500

R500 100 300 500
R502 100 300 500
R503 100 300 500
R507 100 300 500

R508B 100 300 500
H1301 100 300 500
R408A 100 300 500
FA188 100 300 500

R236FA 100 300 500

N1230 100 300 500

R227 100 300 500

HFP 100 300 500
FC72 100 300 500

R21 100 300 500
R125 100 300 500

H1211 100 300 500
H2402 100 300 500

R245FA 100 300 500

R422A 100 300 500
R422D 100 300 500
R427A 100 300 500

HFO01234YF 100 300 500

R424A 100 300 500
R426A 100 300 500

Ammonia/NH3/R717 100 300 500

32 P/N: 3015-4256 Rev 13

A.2. Response Time/Flow Rate

Single Zone Gas Monitor

Gas-Sample Line

Feet (Meters)

0 0 0

100 (30.5) 20 40

200 (61) 40 60

300 (91.4) 56 90

400 (123) 80 120

500 (152.4) 105 180

Response Time
Seconds (HGM)

Response Time

Seconds (AGM)

Dependent on gas-sample line length; 0.25" OD x 0.17" ID tubing.

P/N: 3015-4256 Rev 13 33

Single Zone Gas Monitor

APPENDIX B. AGENCY APPROVALS

DECLARATION OF CONFORMITY

The manufacturer of the
products covered by this
declaration:

Year conformity is declared: 2010 (EN 14624), 2008 (all others)

Product(s): Refrigerant Monitors

Model(s): HGM-SZ and HGM-MZ (Single and Multi Zone Refrigerant Monitors) (EN 14624 only)

The undersigned hereby declares that the above referenced products are in conformity with the provisions of the following
standard(s) and is in accordance with the following directive(s).

Standard(s):

EN 14624 Performance of mobile leak detectors and of room controllers of halogenated refrigerants

EN 61326-1:2006 Electrical equipment for measurement, control, and laboratory use—EMC requirements: Part 1 General Requirements

EN 61010-1:2001 Safety requirement for control, measurement, and laboratory equipment

Directive(s):

Bacharach, Inc.

621 Hunt Valley Circle

New Kensington, PA 15068

HGM-SZ, AGM-SZ, CO2-SZ, HGM-MZ, AGM-MZ, CO2-MZ and MZ-RD.

2004/108/EC EMC Directive

2006/95/EC Low Voltage Directive

Signature:

Name: Doug Keeports
Title: VP of Product Development
Date: 06 December 2010

The technical documentation file required by this directive is maintained at the corporate headquarters of Bacharach, Inc.

European Standard EN14624: 2005 testing with R-134a (Halogen Gas Monitor Only).

Min. Sensitivity Threshold 1 ppm

Max. Sensitivity Threshold (within 1 ppm ± 10% reading accuracy range) 1,000 ppm

Max. Sensitivity Threshold within Instrument Reading Range 10,000 ppm

Zeroing Time from 1,000 ppm* <12 seconds

Zeroing Time from 10,000 ppm* <25 seconds

Reaction Time for detection of minimum threshold* ≤12 seconds

Min. Sensitivity threshold once max. threshold has been measured 1 ppm

Repeatability at 500 ppm ± 1% of reading

* Based on a minimum tubing length of one foot

34 P/N: 3015-4256 Rev 13

Single Zone Gas Monitor

P/N: 3015-4256 Rev 13 35

∇ ∇ ∇

Single Zone Gas Monitor

621 Hunt Valley Circle, New Kensington, PA 15068-7074

Toll Free: 800-736-4666 • Tel: [phone] • FAX: [phone]

Website: www. MyBacharach.com • E-mail: [e-mail]

Printed in U.S.A. ® Registered Trademark of Bacharach Inc.

36 P/N: 3015-4256 Rev 13

Headquarters: