Dwyer DPM User Manual

Bulletin J-25

Particu late Moni tori n g Sy s tems

DPM

Particulate Monitoring

Systems

DPM Control Units

PMS Sensors

INSTALLATION & OPERATING

MANUAL

Dwyer Instruments, Inc.

102 Indiana Highway 212 P.O. Box 373 Michigan City, IN 46361 USA Telephone 800-872-9141

www.dwyer-inst.com

Particu late Moni tori n g Sy s tems Installation & Operating Manual

I. Technical Support & Return Procedure

Dwyer Instruments, Inc. provides industry leading technical support for all product lines. The technical support department is staffed with a team of engineering professionals.

Areas of assistance provided by the Technical Support department include:

• Pre-Installation Site Analysis

• Product Installation

• General Operation

• Application Specific

• Routine Calibration

• EPA Compliance

• Performance Upgrades and Add-On Features

To ensure the best and most efficient technical support please be prepared with the following information prior to contacting Dwyer Instruments, Inc. If it is determined that the component must be returned for evaluation/repair, a Return Material Authorization number will be issued. You must include the RMA number on the packing slip and mark the outside of the shipping container.

• Company Name ________________________________________

• Product Model Number ________________________________________

• Product Serial Number ________________________________________

• Date of Installation ________________________________________

• Reason for Return ________________________________________

Dwyer Instruments Technical Support may be reached by:

Phone: (800) 872-9141

Fax: (219) 872-9057

E-Mail: tech@dwyer-inst.com

Hours of Operation: 8AM – 5PM Central Standard Time

• Any control unit or particulate sensor that was exposed to hazardous materials in a process

must be properly cleaned in accordance with OSHA standards and a Material Safety Data Sheet (MSDS) completed before it is returned to the factory.

• All shipments returned to the factory must be sent by prepaid transportation.

• All shipments will be returned F.O.B. factory.

• Returns will not be accepted without a Return Material Authorization number.

Particu late Moni tori n g Sy s tems Installation & Operating Manual

II. Notifications

This document contains important information necessary for proper operation of the product. It is strongly urged that all users of the product read this manual in its entirety. All instructions should be followed properly and any questions that arise should be discussed with Dwye r Instruments, Inc .

Any use or distribution of this document without the express consent of Dwyer Instruments, Inc. is strictly prohibited. Any reproduction is prohibited without written permission.

In no event will Dwyer Instruments, Inc. be liable for any mistake, including lost profits, lost savings, environmental compliance costs or other incidental or consequential damages arising out of the use or inability to use this manual, even if advised of the possibility of such damages, or an y claim b y any oth er par ty.

Identifies information about practices or circumstances that can lead to personal

injury or death, property damage, or economic loss.

Warning statements help you to:

• Identify a hazard

• Avoid a hazard

• Recognize the consequences

Identifies information that is critical for successful application and

IMPORTANT

Identifies information, sections or statements in this manual that apply to

understanding of the product.

approved hazardous area systems, regulations or installation.

Particu late Moni tori n g Sy s tems Installation & Operating Manual

III. Approvals and Certifications

CE Conformant

The Control Units and Particulate Sensors conform to the appropriate country standards and governing regulations listed below:

• EN 61010/1993 “Safety requirements for electrical equipment for measurement, control

and laboratory use.”

• EN 55011/1991 “Limits and methods of measurement of radio interference

characteristics of industrial, scientific and medical equipment”. Class A: Industrial and commercial.

• EN50082-1/1993 “Electromagnetic compatibility – Generic immunity standard”. Part 1:

Residential, commercial and light industry.

CSA Certified

This Particulate Monitoring system is certified by the Canadian Standards Association (to US and Canadian Standards) for use in hazardous locations as specified below:

Particulat e Se nsor:

Intrinsically Safe for Hazardous Locations PMS-AHZ1 Intrinsically Safe Particulate Sensor in the following areas:

Class I, Division 1, Groups A, B, C, and D

Class II, Division 1, Groups E, F, G

Class III

For use with the Control Units listed below, 70ºC maximum ambient.

Note: There is no temperature rise caused by electrical components. Temperature

code is based only on ambient temperature, (e.g. a 200°C process requires a T3 rating.)

Control Unit:

For use in Ordinary Locations Only

DPM-AHZ1 Control Unit rated 115 Vac/230 Vac, 0.1A or 24Vdc, 0.25A, -25ºC to 70°C, with intrinsically-safe output to Particulate Sensor.

DPM-AHZ1 Control Unit - Approved for use with PMS-AHZ1 sensors, where the PMS-AHZ1 sensor is the only component located in the hazardous area.

Particu late Moni tori n g Sy s tems Installation & Operating Manual

IV. Specifications

PARAMETER DETAIL SPECIFICATION NOTE

Input Voltage 115V~

230V~

24VDC

Input P ower 6 Watts Max.

Measurement Units picoamperes (pA) 1 x 10 ⎯ ¹² Amp

Detection Level/Range

Electronic Accuracy

Temperature Range

Relay Outputs

4-20mA Output (Optional)

RS-485 Network (Optional)

Enclosure Type

Mounting

Materials

Process Temperature Range Operating

Ambient Temperature Range Operating

Pressure Range Operating Full Vacuum to 10PSI (2.11kg/cm²) Higher Optional

Enclosure

Standard 5.0pA – 5000pA Optional 0.5pA – 5000pA

Operating

Storage

Type Form A (SPST)

Rating

Type Isolated

Rating 470Ω Max. Loop Impedance

Span Adjustable Via Keypad Default: 1000pA LOG Type Isolated, Multi-drop, ½ Duplex

Settings 19,200 BPS, 8 Data Bits, 1 Stop Bit, No Parity

NPT ½” NPT Thread

QC 1.5” Quick-Clamp (Mounting ferrule is 1” NPT)

FL ANSI Flange (2”, 150# is typical)

Other Others Available

Probe

Nipple/Mount Stainless Steel

Type Painted Cast Aluminum Other - Consult Factory

Rating NEMA 4X (IP 66) Other - Consult Factory

CONTROL UNIT

97–132V~, 47–63Hz

Fuse: 0.032A, Slo-Blo 250V, Type ‘T’

Fuse: 0.050A, Slo-Blo 250V, Type ‘T’ when Self

Check Option is installed

195–264V~, 47–63Hz

Fuse: 0.032A, Slo-Blo 250V, Type ‘T’

Fuse: 0.050A, Slo-Blo 250V, Type ‘T’ when Self

Check Option is installed

22–26VDC

Fuse: 0.250A, 250V, Type ‘T’

± 5% of Range, std

± 1% of Range, optional

-13°F to +160°F (-25°C to +70°C)

-40°F to +185°F (-40°C to +85°C)

5A @ 240V~ Resistive **Customer must provide a

8A (maximum) fuse in series with relay load.

Painted Cast Aluminum NEMA 4X or optional CSA

Approved Enclosure

PARTICULATE SENSOR

Stainless Steel

With Protective Teflon Layer

-40°F to +250°F (-40°C to +120°C)

-40°F to +450°F (-40°C to +232°C)

-40°F to +800°F (-40°C to +426°C) > 800°F

-40°F to +160°F Maximu m (-40 °C to +70°C)

Maximum Must be Calculated for each application

Selector Switch to 115V

Selector Switch to 230V

No Select or Swit ch

Optional Model

Over Fu ll Temp Range

Modbus/RTU Protocol

Other optional

Higher Optional

T-Code Ratings for

AHZ1 option only

Document No. 209-1025-D

Particu late Moni tori n g Sy s tems Installation & Operating Manual

PARAMETER DETAIL SPECIFICATION NOTE

Type High Quality Coaxial

Temperature Range

Maximum Len gth 300 ft.

Approximate Particulate

Concentration

Velocity Range 150 ft/min. (45.7 m/min.) and Higher

Particle Size Range

Operating

DETECTION LEVEL/RESO LUTI ON AND APPLICATION RANGE

5.0pA

Standard

0.5pA

Upgrade

PARTICULATE SENSOR CABLE

-40°F to +392°F (-40°C to +200°C)

At least 5.0 – 5000 mg/m³ At least 0.002 to 2.0 gr/ft³

At least 0.5 to 5000 mg/m³ At least 0.0002 to 0.2 gr/ft³

0.3 Micron and higher If <10.0 Micron, 0.5pA Detection Required

Barely Visible to Visible

>5% Opacity

Moderate Dilute Flow

Invisible to Barely

Visible, < 5% Opacity

Light Dilute Flow

Document No. 209-1025-D

Particu late Moni tori n g Sy s tems Installation & Operating Manual

V. Installation Drawings

Drawing Number Sheets Description

225-1016-01 2 Particulate Monitor Installation Drawings

225-1014-06 1 Particulate Flow Sensor Installation Drawing, All Mounts

225-1036 1 High Temperature / High Pressure Particulate Flow Sensor

Installation Drawing

Hazardous Area Control Drawing

225-1005 1 Hazardous Area Control Drawing

Document No. 209-1025-D

Particu late Moni tori n g Sy s tems Installation & Operating Manual

TABLE OF CONTENTS

Safety...............................................................................................................................................2

1.1 Applicable Use.......................................................................................................................... 2

1.2 General.....................................................................................................................................2

1.3 Hazardous Area Systems........................................................................................................... 3

2. Introduction.................................................................................................................................... 4

3. Control Unit Installation.................................................................................................................5

3.1 Location.................................................................................................................................... 5

3.2 Wiring.......................................................................................................................................5

3.3 Grounding................................................................................................................................. 6

4. Particulate Sensor Installation........................................................................................................7

4.1 Location.................................................................................................................................... 7

4.2 Mounting....................................................................................................................... ........... 8

4.3 Senso r Te mperatu re Considerations...........................................................................................9

5. Particulate Sensor Coaxial Cable Installation.............................................................................. 10

6. Control Unit Operation.................................................................................................................12

6.1 User Interface Overview.......................................................................................................... 12

6.2 Menu 1 Setup..........................................................................................................................13

6.3 Menu 2 Setup..........................................................................................................................14

6.4 Menu 3 Setup..........................................................................................................................16

6.5 Long Term Averaging.............................................................................................................17

6.6 4-20mA Analog Output Scaling............................................................................................... 18

6.7 Interpreting Particulate Readings for Fabric Filter Applications................................................ 20

6.8 Alarm Levels for Fabric Filter Applications ............................................................................. 22

7. Manual System Zero Check.......................................................................................................... 23

8. Automatic Self Checks.................................................................................................................. 26

8.1 Control Unit Hardware Check..................................................................................................26

8.2 Control Unit Zero Check.........................................................................................................27

8.3 Control Unit Span Check.........................................................................................................28

8.4 Sensor Cable Ch eck................................................................................................................. 28

8.5 Particulate Sen sor Check ......................................................................................................... 28

8.6 Process Running Signal........................................................................................................... 29

8.7 Monitoring Self Check Status.................................................................................................. 29

8.8 Particulate Alarming During Self Checks................................................................................. 30

8.9 Self check Recording............................................................................................................... 30

9. Troubleshooting ............................................................................................................................ 31

10. Routine Maintenance....................................................................................................................31

11. Spare Parts.................................................................................................................................... 32

12. Appendix ....................................................................................................................................... 33

12.1 Modbus®/RTU RS-485 Networking Protocol .......................................................................... 34

12.2 Ethernet/IP® Networking........................................................................................................ 37

Particu late Monitoring Sy s tems Installation & Operating Manual

1. Safety

1.1 Applicable Use

These particulate monitor systems ar e not designed for use as a functional safety device and do not carry a SIL rating. The device must not be used as part of a safety system or as an input signal to a safet y system. Th es e m on itors are designed for general process and environ mental moni toring.

1.2 General

This apparatus is available with various agency approvals as noted in the approvals section. All versions of this device have been designed to comply with EN 61010, safety requirements for elec tric al equipment for measurement, control and laboratory u s e, and are s u pp lied in a safe condition. Before beginning an installation the following safety precautions and all precautions noted listed throughout this manual and in the installation drawin gs must be followed.

AREA CLASSIFICATION

• Before installing any device confirm area classification requirements. Do

not install any device that is not tagged as suitable for the required area classificati on .

PROCESS AND AMBIENT CONDITIONS

• Before installing any device, confirm ambient temperature, process

temperature and process pressure requirements. Do not install any device that is not tagged as suitable for the required temperatures and pressures. Confirm compatibility of the wetted and non-wetted materials.

INSTALLATION PERSONNEL AND SERVICE

• Only appropriately licensed and trained professionals should perform the

mechan ical and el ectrical ins tallation.

• This device does not contain field serviceable components other than the

line fuse. Only factory personnel can perform service on this equipment.

• For operator safety and to prevent ignition of flammable or combustible

atmospher es always disconnect power before servicing.

GROUNDING AND FUSING

• Before turning on the instrument, you must connect the protective earth

terminal of the instrument to a proper earth ground. Grounding to the neutral conductor of a single-phase circuit is not sufficient protection.

• Only fuses with the required current, vol tage and specified type should be

used. D o n ot u s e r ep aired fuses or short-cir cu ited fuse hol d er s .

REGULATORY CODES

• Installation and operation must adhere to all national an d local codes.

Particu late Monitoring Sy s tems Installation & Operating Manual

1.3 Hazardous Area Syste ms

Systems approved for use in hazardous areas include nameplates indicating that they a re suitable for inst allation in hazard ou s areas. The nameplate list s allowable hazardous areas and T code ratings as well as approval agency markings. Do not install any device that is not tagged as suitable for the area classifica tion.

Section s or st at emen ts in thi s man ua l tha t a pply to a pproved ha zar dous ar ea syst ems or in s tall at ion s are designated with the following symbol. Designation for use in hazardous areas does not make the system su itable for use as a functi onal safety device.

EXPLOSION HAZARD

• Hazardous area control drawing 225-1005 must be followed for proper

installation.

• Installation mu st be in accord ance with ANS I /ISA RP12.6 an d National

Electric Code ANSI/NFPA 70, Article 504

• Substitution of components may impair intrinsic safety.

• Do not connect or disconnect components unless power has been

disconnected.

• Designation for use in hazardous areas does not make the system

suit able for use as a fun ctional safety device.

Particu late Monitoring Sy s tems Installation & Operating Manual

2. Introduction

A Parti culate Mon itorin g System con sist s of a contr ol unit, a par ticul ate sensor and a sen sor coaxia l cable. Applications include continuous emissions monitoring, baghouse filter leak detection and process particulate flow monitoring. Types of particulate include both solid particulates (dusts, powders, granulars and pellets) and liquid particulates (mists). Various control unit models and sensors are pr ovided to match the application and process monitoring needs.

Principle of Operation

Particulate Monitoring Systems employ a highly reliable technology based on induction. A sensor probe is mounted in an air flow stream such as a pipe, duct or stack (for small tubing an inline nonintr usive ring sen sor is employed). As particul ate flows near and over the sen sing element, minut e electr ical cur rents ar e induced in th e sensor an d transfer red to th e control unit by a coa xial cable. A microprocessor filter s and processes the signal into a normalized, absolute output that is lin ear to the mass concentrat ion of particu late.

_ MASS CORRELATION

IMPORTANT

It is important to note that the above relation between instrument units (pA) and actual mass (mg/m appropriate model and range and for providi ng a general indic ation of the typic al particulate levels monitored. For a true correlation between (pA) and actual mass (mg/m must be performed for each application and a recommended model and detection level must be ordered. It is also important to note that th e accuracy of such correlations is application dependent and produces the best results with consistent particulate and process conditions. The user must follow proper procedures and must understand the typical accuracy of such correlation techn iques. Consult factor y for detail s.

or gr/cf) is just an approximate guide for selecting the

or gr/cf), a gravimetric correlation such as an isokinetic sample

Control Unit

The con trol un it (i .e. el ectroni cs) is h oused in a ru gged cast alumin um encl osure. An LCD di splays particulate levels in bar-graph and digital forms. A lockable membrane keypad is provided for setup and adjustment. An optional self ch eck sub system is available to automatically verify calibration and operation of the con trol unit, sen sor and cable. Various r elay, analog inputs and outputs, as well as seri al communications are ava ilable in the control unit.

Particulate Sensor

The particulate sensor is very rugged and vir tually maintenance-free. The sensor is passive with no active circuits for high reliability and durability. It does not require special alignment and is not affected b y normal vibration.

Coaxial Cable for Particulate Sensor

The cable that connects the particulate sensor to the control unit is a high-quality coaxial cable specifically desi g ned for the system. Maximum length i s 30 0 ft ( 9 1m ). Do not use substitute cable.

Particu late Monitoring Sy s tems Installation & Operating Manual

3. Control Unit Installation

3.1 Location

The foll o wi ng factors should be cons idered when d etermining the contr ol un it locati on:

 Locate at a position that is convenien t for setup and operation  Mount at eye level  Mount to a flat surface in a vertical orientation  Do not mount to surfaces with excessive heat or vibration

INSTALLATION PERSONNEL

• Only appropriately licensed professionals sh ould install this product.

• For operator safety and to prevent ignition of flammable or combustible

atmospher es always disconnect power before servicing.

CONTROL UNIT LOCATION

• The con trol unit may only be located in ordinary locations (non-hazardous

safe areas).

• Do not locate the control unit in a hazardous area unless it is inside an

appropriately rated explosion-proof or purged enclosure and par t of an appr oved h aza rdou s ar ea syst em wi th a ppr oved c ontr ol un it an d approved sensor assembly.

• Do not l ocate the con trol unit in or n ear sources of very high elect rical n oi s e

such as a Variable Frequency Drive (VFD) or Motor Control Center. Locate the con trol unit at least 10 feet fr om thes e sources an d, if possibl e, power the control unit from a separate power source. If power is supplied from the same br anch cir cuit or a cir cui t con tainin g el ectri cal n oise, in st all a quali ty line filter such as an Islatrol IC+102.

Mounting: Mounting holes are in tegrated into the enclosure base. Mounting hardware should be

capable of supporting five times the control unit weight. Refer installa tion drawings for dimensions.

supplied as

3.2 Wiring

An appr opriatel y li censed electrician mu s t p er form all electrical connection s.

CONTROL UNIT WIRING

• All wiring must be rated 250V minimum.

• The con trol un it mu st be moun ted wit hin si ght of an appropr iate elect ri cal

disconnect (on/off switch) to ensure safety during installation and maintenance.

• The coaxial cable must be in conduit that is separate from all other circuits.

Particu late Monitoring Sy s tems Installation & Operating Manual

There are connections inside the control unit for the sensor coaxial cable, the power supply, relay

contacts and optional 4-20mA or RS-485 outputs. Refer to the installation drawings.

Conduit openings are provided in the bottom of the enclosure to route wiring into the enclosure.

Never drill new c onduit openings in the side or top of th e enclosure as a bad conduit seal may allow water to enter the enclosure.

3.3 Grounding

Proper grounding of the control unit is essential to ensure reliable operation and operator safety.

When used as part of an approved hazardous area system two separate ground connections are required, protective ground and intrin sic safet y ground. It is not suffi cient to use a single ground connection and jumper the protective and intrinsic safety grounds inside the control unit enclosure.

CONTROL UNIT GROUNDING

• Protective earth ground must be connected to t erminal #1.

• The enclosure co ver must be bonded to the enclosure base with the s u pplied

gr ound bonding wire – do n ot remove .

• When used a s par t of an approved haz ardous area system: Intr insic safet y

ground must be connected to terminal #2 and must be less than 1 ohm with respect to earth ground. Refer to control drawing 225-1005.

• When used a s par t of an approved haz ardous area system: Intr insic safet y

ground must utilize a grounding electrode independent of the protective eart h ground.

Particu late Monitoring Sy s tems Installation & Operating Manual

4. Parti culate Sensor I nst allation

4.1 Location

The foll o wi ng factors should be cons idered when d etermining the sensor location:

 Area Classifica tion  Flow conditions  Electrical (Faraday) shi elding  Atmospheric shielding (in the case of ducts and stacks open to atmosphere)  Access for install at i on and service

SENSOR LOCATION

• Before installing the sensor, confirm ar ea classification r equirements. Do

not install any device that is not tagged suitable for the required area classificati on .

• Before installing the particulate sensor, confirm ambient temperature,

process t emperat ure and process pressur e requirem ents. Do not install an y device that is not tagged as suitable for the required temperatures or pressures. Confirm compatibility of wetted and non-wetted materials.

• For hazardous areas, a maximum ambient temperature of the particulate

sensor enclosure must not be exceeded. Refer to the Temperature Considerations section for full details.

It is essent ial for th e pip e/duct to pr ovide a n el ectri cal (Far aday) sh iel d for t he sen sor. It is ther efore required that the pipe, duct or stack is metal and earth grounded (small inline tubing sensors pr ovide their own section of metal pipe which also must be grounded). Consult the factory when insertion probe style sensors are to be installed in non-conductive pipes, ducts such as plastic or fiberglass.

The particulate sensor must be installed in a position where the flow is reasonably laminar and th e particulate is evenly distributed. The ideal position is where the pipe/duct is straight and free of items such as valves, damp ers or ot her fl ow obst ructions for a l e ngth of 4 diameters or longer . Horiz ontal or vertical sections are acceptable. For basic flow/no flow detection it is not necessary to select a location with a long straight section if access has to be sacrificed dramatically. For trending and measur em ent the n eed for a s tra igh t sect i on and lamin ar flow in creases. Th e par ti cul ate s en sor sh oul d be position ed with appr oximately two thirds of the straight section upstr eam of the sensor and one third downstream. The particulate sensor should be located in the center of the pipe/duct. If the pipe/ducting is square it should be located in the center of one of the sides. In either case, be sure the position is such that the tip of the sensor reaches the midpoint or beyond. Always use good engineering sense and be sure th e s ensor will interact with a r easonable rep resentat ion of the flow.

For emissions detection applications such as baghouses or cartridge collectors, good locations are generally found upstream of the blower. Th e particulate sensor can be located downstrea m of the blower but not too close to th e stack outlet. There must be sufficient duct downstream of the sensor to provid e adeq uat e electr ical and atmosp her ic shi eldin g. Th e sensor shoul d be locat ed up strea m of an y sampling ports by at least two feet. It is not necessary that the sensor be in the same section of the duct/stack as the sampling ports. Particulate sampling ports require fully-developed laminar flow and longer straight sections.

Particu late Monitoring Sy s tems Installation & Operating Manual

Extreme vibration should be avoided.

_ ATMOSPHERIC AND ELECTRICAL SHIELDING OF SENSOR

IMPORTANT

• It is essential for the pipe/duct to provide an electrical (Faraday) shield for

the sensor. The pipe/duct or stack should be metal with a high quality earth ground. Consult the factory for non-conductive pipes/ducts such as plastic or fiberglass. (Small in-line sensors for small tubing provide their own section of metal pipe, which also must be grounded).

• When the sensor is placed in a stack/duct choose a location away from

atmosph ere so wind driven atmospheric particulate or rain does not flow over the sensor and so ex ternal electrical n oi se cannot affect operati on .

• Do not p lace the sen sor where th e pipe/duct i s corroded or cr acked whi ch

may allow water droplets to create signals as they flow by.

4.2 Mounting

The foll o wing types of process moun ts are availa bl e for the stan dard probe style sensors: NPT, Quick-Clamp an d AN S I fl ange. Inline sensors for small tubing are supplied with swage lock or other tube connections to mount inline

with metal or plastic tubing.

Installation drawings of each mounting type ca n be found in the appendix.

HAZARDOUS AREA SENSOR GROUNDING

• For hazardous area applications an external sensor earth ground cable is

require d to main tain sensor ground ing duri ng in stallat ion an d m ainte nance.

• The ground cable must remain attached when the sensor is temporarily

removed fr om the process – do not disconnect the ground cable.

• Leave sufficient ground cable service loop for easy removal of the sensor

from the process.

Particu late Monitoring Sy s tems Installation & Operating Manual

4.3 Sensor Temperature Considerations

The sensor may be ordered with on e of three process temperature ranges:

1. -40ºF to 250ºF (-40ºC to 121ºC)

2. -40ºF to 450ºF (-40ºC to 232ºC)

3. -40ºF to 800ºF (-40ºC to 426ºC)

4. Consult Factory for Temperatures >800°F

Note: For the process temperatures in the ran ge of 233ºC - 426ºC, a high temp probe must be used. The max imum allowab le ambie nt temp erature at sensor housing is 70ºC.

Table: T Code Rating for Sensor

Process Temperature Does Not Exceed

Maximum Ambi en t

75ºC (167ºF) 125ºC (257ºF) 225º C (437ºF) 325ºC (617ºF) 426ºC (800ºF)

70ºC (160ºF) T6 T4 T2C T1* T1*

Particu late Monitoring Sy s tems Installation & Operating Manual

5. Particulate Sensor Coaxial Cable Installation

Connection: Prior to making coaxial cable connections review the following routing in structions.

IMPORTANT

_ PARTICULATE SENSOR COAXIAL CABLE ROUTING

• The sensor cable must be installed in con duit that is separate from all other

wiring.

• The cabl e sh oul d be r ou ted from th e part i cula te s en sor t o the c ontrol unit in

a pa th t hat avoid s hi gh vi brat ion, hea t over 394 °F (200°C) and an y stron g magn etic or electrical field s.

• The cabl e should be locat ed at least 18 in (46 cm) away from an y p ower

lines (conduit), motors, frequency drives and other sources of electrical inter ference throughout its entire path.

• The cabl e shou ld be i nsta lled in metal lic con duit . At th e process en d, use a

section of shielded flex conduit that is 1 to 2 times the probe length to serve as a ser vice loop.

The coa xi a l ca ble i s c on n ected t o th e con t r ol un it by a coa x con n ector a nd is connected t o th e sen s or

by two ring terminal s . The connect ors are norma ll y sup p lied pre- assembled t o th e cable.

Once t he cable h as been r outed, in sert th e coax conn ector int o the contr ol unit enclosur e leavin g a

very small service loop as specified in the installation drawing shown in the appendix. A larger service loop should be used at the sensor end, typically 1 to 2 times the sensor length. Any small amount of extra cable length should be pulled into the nearest junction box and NOT left in the sensor housing or in th e control unit enclosure. If there is a significant amount of extra cable ( many feet), the cable sh ould be sh orten ed at th e sensor end and the sen sor end connector s should be re-assem bled using factory-supplied connectors and instructions.

IMPORTANT

_ COAXIAL CABLE INSIDE THE CONTROL UNIT

• A ferrite suppressor is located on the sen sor coaxial cable near the coax

connector and must remain inside the control unit enclosure.

• The bla ck ca ble i n sula ti on must ext en d a min imum of 6 i n (15 cm ) in t o th e

coax cabl e conduit .

• Do not l eave any excess ca bl e in the control unit or sensor housin g .

Insid e the particulate sensor encl osure, att ach the coax cable as in di cated in th e s ensor dra win g. When connecting the braided shield, ensure it does not touch the surge voltage protection assembly. Do not leave exc es s cable in side the sensor housing.

+ 37 hidden pages