Critical Environment Technologies GEM-II Operation Manual

Operation Manual

www.critical-environment.com

GEM-II Self Contained Gas Detector

Rev. E | 2014.10

GEM-II - Operation Manual Rev. E | 2014.10

TABLE OF CONTENTS

1 POLICIES .................................................................................................................. 5

1.1 Important Note ..............................................................................................................5

1.2 Warranty Policy ..............................................................................................................6

1.3 Service Policy .................................................................................................................6

1.4 Copyrights ......................................................................................................................7

1.5 Disclaimer ......................................................................................................................7

1.6 Revisions ........................................................................................................................8

2 INTRODUCTION ..................................................................................................... 9

2.1 General Description .......................................................................................................9

2.2 Key Features...................................................................................................................9

2.3 Model Designations .....................................................................................................10

2.3.1 Type A – Single Channel ............................................................................................... 10

2.3.2 Type B – Single Channel Controller ............................................................................... 11

2.3.3 Type D – Dual Channel .................................................................................................. 12

2.3.4 Type E– Dual Channel ................................................................................................... 13

3 INSTRUMENT SPECIFICATIONS .........................................................................13

3.1 Technical Specications................................................................................................13

3.2 Standard Enclosure Dimensions ...................................................................................16

3.3 Watertight Enclosure Dimensions ................................................................................16

4 SENSOR SPECIFICATIONS ...................................................................................17

4.1 Sensor Specications ...................................................................................................17

4.2 Remote Sensor Specications ......................................................................................18

4.3 Calibration Extending Firmware (CEF) and Sensor Aging .............................................18

5 FEATURES & FUNCTIONS ....................................................................................19

5.1 Standard Exterior Enclosure .........................................................................................19

5.2 Watertight Exterior Enclosure ......................................................................................20

5.3 Interior System Layout .................................................................................................21

6 INSTALLATION ...................................................................................................... 22

6.1 AC and DC Wiring .........................................................................................................22

6.1.1 Wiring Example 1 .......................................................................................................... 22

6.1.2 Wiring Example 2 .......................................................................................................... 23

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6.1.3 Wiring Example 3 - INCORRECT ..................................................................................... 23

6.1.4 Wiring Example 4 .......................................................................................................... 24

6.1.5 Wiring Example 5 (J2 Removed) ................................................................................... 24

6.1.6 Wiring Example 6 (J2 Removed) ................................................................................... 25

6.2 Sensor Mounting Heights ............................................................................................25

6.3 Standard Enclosure Mounting Components .................................................................26

6.3.1 Enclosure Base .............................................................................................................. 26

6.3.2 Enclosure Top ................................................................................................................ 26

6.3.3 Enclosure Bottom ......................................................................................................... 27

6.4 Remote Sensor Connection ..........................................................................................27

6.5 Wiring Connections ......................................................................................................28

6.5.1 Types A, B and D ............................................................................................................ 28

6.5.2 Type E............................................................................................................................ 28

6.6 Important Notes for Wiring ..........................................................................................29

6.7 System Installation ......................................................................................................29

6.7.1 Low Voltage Power ........................................................................................................29

6.7.2 Wiring to Remote Sensor .............................................................................................. 30

6.7.3 Voltage to Remote Sensors ........................................................................................... 30

6.7.4 Relay Connections......................................................................................................... 30

6.8 Installation Examples ...................................................................................................31

6.8.1 Type A with Internal Sensor and Enclosed Transformer ................................................. 31

6.8.2 Type B with Remote Sensor or Analog Transmitter ........................................................ 32

6.8.3 Type D with One Internal & One Remote Sensor ............................................................ 33

6.8.4 Type E with Two Internal Sensors .................................................................................. 34

7 OPERATION ...........................................................................................................34

7.1 System Operation ........................................................................................................34

7.2 Test Functions ..............................................................................................................35

7.3 Dip Switch Package ......................................................................................................36

7.4 Internal Audible Alarm Operation ................................................................................37

7.5 Jumpers .......................................................................................................................37

7.6 Adjusting Alarm Set Points ..........................................................................................39

7.6.1 Voltage Reference Table for Alarm Settings ................................................................... 41

7.7 Time Delays for Relay Operations .................................................................................42

7.7.1 Procedure for Setting Time Delays .................................................................................44

7.8 Temperature Display - Unit of Measure ........................................................................45

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7.9 Latching Relay Functions .............................................................................................45

7.10 LED Digital Display .....................................................................................................46

8 CALIBRATION ........................................................................................................47

8.1 Calibration Specications .............................................................................................47

8.1.1 Gas ................................................................................................................................ 47

8.1.2 Exception ...................................................................................................................... 47

8.1.3 Regulators & Flow ......................................................................................................... 47

8.1.4 Adapters ....................................................................................................................... 47

8.2 Calibrating Sensors ......................................................................................................48

8.2.1 Calibration Frequency ................................................................................................... 48

8.3 Calibration Procedure ...................................................................................................48

8.4 Calibrating the Internal Sensor ....................................................................................49

8.4.1 Setting Span Gas Value ................................................................................................. 49

8.4.2 Calibrating the Null (Zero) Value ................................................................................... 49

8.4.3 Calibrating the Span Gas ............................................................................................... 50

8.5 Calibrating Second Internal Sensor ..............................................................................51

8.6 Calibrating Remote Sensor ..........................................................................................51

8.6.1 Setting Span Gas Value for Remote Sensor ................................................................... 51

8.6.2 Calibrating the Null (Zero) Value ................................................................................... 51

8.6.3 Calibrating the Span Gas ............................................................................................... 52

8.7 Calibrating 4-20 mA for Incoming Analog Transmitter ................................................53

8.7.1 Using a Current Source to Calibrate the Null .................................................................. 53

8.7.2 Using a Current Source to Calibrate the Span ................................................................ 53

8.7.3 Using a CETCI Analog Transmitter to Calibrate the Null .................................................. 54

8.7.4 Using a CETCI Analog Transmitter to Calibrate the Span ................................................ 54

8.8 Forcing Calibration ......................................................................................................55

9 ACCESSORIES .......................................................................................................56

9.1 Calibration Kit ..............................................................................................................56

9.2 Metal Protective Guard ................................................................................................56

10 MAINTENANCE ..................................................................................................57

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1 POLICIES

1.1 Important Note

Read and understand this manual prior to using this instrument. Carefully read the warranty policy, service policy, notices, disclaimers and revisions on the following pages.

This product must be installed by a qualied electrician or factory trained technician and according to instructions indicated in this manual. This instrument should be inspected and calibrated regularly by a qualied and trained technician. For more information, refer to Sections 8 Calibration and 10 Maintenance of this manual.

This instrument has not been designed to be intrinsically safe. For your safety, do not use it in classied hazardous areas (explosion-rated environments).

INSTRUMENT SERIAL NUMBER:

__________________________________________________________

PURCHASE DATE:

__________________________________________________________

PURCHASED FROM:

__________________________________________________________

GEM-II - Operation Manual Rev. E | 2014.10

1.2 Warranty Policy

• Disconnect power before servicing

• Caution: More than one live circuit

• Supply: 24 V (nominal, 50 or 60 Hz)

• Certied for electrical shock and electrical re hazard only

Critical Environment Technologies Canada Inc. (CETCI), also referred to as the manufacturer, warrants this instrument, (excluding sensors, battery packs, batteries, pumps and lters) to be free from defects in materials and workmanship for a period of two years from the date of

purchase from our facility. The sensors have a warranty period of one year on a pro-rated basis from the date of purchase from our facility. If the product should become defective

within this warranty period, we will repair or replace it at our discretion.

The warranty status may be aected if the instrument has not been used and maintained per the instructions in this manual or has been abused, damaged, or modied in any way. This instrument is only to be used for purposes stated herein. The manufacturer is not liable for auxiliary interfaced equipment or consequential damage.

Due to ongoing research, development, and product testing, the manufacturer reserves the right to change specications without notice. The information contained herein is based on data considered accurate. However, no warranty is expressed or implied regarding the accuracy of this data.

All goods must be shipped to the manufacturer by prepaid freight. All returned goods must be pre-authorized by obtaining a Returned Merchandise Authorization (RMA) number. Contact the manufacturer for a number and procedures required for product transport.

1.3 Service Policy

CETCI maintains an instrument service facility at the factory. Some CETCI distributors / agents may also have repair facilities; however, CETCI assumes no liability for service performed by anyone other than CETCI personnel.

Repairs are warranted for 90 days after date of shipment (sensors have individual warranties).

Should your instrument require non-warranty repair, you may contact the distributor from whom it was purchased or you may contact CETCI directly.

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Prior to shipping equipment to CETCI, contact our oce for an RMA #. All returned goods must be accompanied with an RMA number.

If CETCI is to do the repair work, you may send the instrument, prepaid, to:

Attention: Service Department Critical Environment Technologies Canada Inc. Unit 145, 7391 Vantage Way Delta, BC, V4G 1M3

Always include your Returned Merchandise Authorization (RMA) number, address, telephone number, contact name, shipping / billing information, and a description of the defect as you perceive it. You will be contacted with a cost estimate for expected repairs, prior to the performance of any service work.

For liability reasons, CETCI has a policy of performing all needed repairs to restore the instrument to full operating condition.

Pack the equipment well (in its original packing if possible), as we cannot be held responsible for any damage incurred during shipping to our facility.

1.4 Copyrights

This manual is subject to copyright protection; all rights are reserved. Under international and domestic copyright laws, this manual may not be copied or translated, in whole or in part, in any manner or format, without the written permission of CETCI.

1.5 Disclaimer

Under no circumstances will CETCI be liable for any claims, losses or damages resulting from or arising out of the repair or modication of this equipment by a party other than CETCI service technicians, or by operation or use of the equipment other than in accordance with the printed instructions contained within this manual or if the equipment has been improperly maintained or subjected to neglect or accident. Any of the foregoing will void the warranty.

Under most local electrical codes, low voltage wires cannot be run within the same conduit as line voltage wires. It is CETCI policy that all wiring of our products meet this requirement.

It is CETCI policy that all wiring be within properly grounded (earth or safety) conduit.

GEM-II - Operation Manual Rev. E | 2014.10

1.6 Revisions

This manual was written and published by CETCI. The manufacturer makes no warranty or representation, expressed or implied including any warranty of merchantability or tness for purpose, with respect to this manual.

All information contained in this manual is believed to be true and accurate at the time of printing. However, as part of its continuing eorts to improve its products and their documentation, the manufacturer reserves the right to make changes at any time without notice. Revised copies of this manual can be obtained by contacting CETCI or visiting www.critical-environment.com.

Should you detect any error or omission in this manual, please contact CETCI at the following

address:

Critical Environment Technologies Canada Inc.

Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada

Toll Free: +1.877.940.8741 Telephone: +1.604.940.8741 Fax: +1.604.940.8745 Email: marketing@cetci.com Website: www.critical-environment.com

In no event will CETCI, its ocers or employees be liable for any direct, special, incidental or consequential damages resulting from any defect in any manual, even if advised of the possibility of such damages.

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2 INTRODUCTION

2.1 General Description

Thank you for purchasing our GEM-II self-contained gas detector.

The GEM series gas detection systems are economical, self-contained, gas detectors for nonhazardous (non-explosion rated) commercial applications. They are available in two basic

congurations: one sensor models and two sensor models. The sensors can be congured as one

integral (A-type), one remote (B-type), one integral and one remote (D-type), or two integral (E-type).

A basic system provides one set of LED indicating lights representing “Power”, “Fail”, “Low (Warning) Gas Alarm”, ‘High Gas Alarm”, an integral audible alarm with door mounted silence push-button, audible time delay, eld settable relay time delays and two alarm relays. In either system, the LED lights provide visual indication of the status of each channel (Int = internal sensor, Ext = external sensor or second channel).

Gas specic electrochemical sensors for toxic gases and Oxygen (O2) are available as are MOS solid-state sensors for refrigerants and catalytic sensors for combustible gases. All GEM integral sensors are packaged as plug-in “smart” sensor modules to reduce eld maintenance time.

If after reading through the manual, you have any questions, please do not hesitate to contact our service department for technical support.

2.2 Key Features

• Single or dual channel

• Network multiple units

• Integral plug & play “smart” sensors or remote sensors

• 4 – 20 mA linear output signal

• Three conduit entry ports

• Thermal resetting fuse

• LED light indicators

• Two 5-amps SPDT relays

• RoHS compliant circuit boards

• CSA & UL certied

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2.3 Model Designations

2.3.1 Type A – Single Channel

Choices for GEM-A:

• One integral electrochemical sensor.

NOTES: Optional LED digital display is shown in the photo.

Opening for integral sensor

(example: CO) to monitor

diused air and gas.

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2.3.2 Type B – Single Channel Controller

Choices for GEM-B:

• One remote catalytic or solid state sensor

• One remote LPT-A or LPT series analog transmitter

NOTES: Optional LED digital display is shown in the photo.

Wiring requirements:

• 3-conductor, 18 gauge to remote sensor.

• 3-conductor shielded to remote analog transmitter.

Plug covering sensor opening

Remote catalytic or

solid state sensor

Remote analog transmitterOR

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2.3.3 Type D – Dual Channel

Choices for GEM-D:

• One integral electrochemical sensor (Channel1) PLUS one remote catalytic or solid state

sensor (Channel 2).

• One integral electrochemical sensor (Channel1) PLUS one remote LPT-A or LPT series analog transmitter (Channel 2).

NOTES: Optional LED digital display is shown in the photo.

Wiring requirements:

• 3-conductor, 18 gauge to remote sensor.

• 3-conductor shielded to remote analog transmitter.

Opening for integral sensor to monitor diused by air and gas.

Remote catalytic or

solid state sensor

Remote analog transmitterOR

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2.3.4 Type E – Dual Channel

Choices for GEM-E:

• Two integral electrochemical sensors (Channel 1 & 2)

NOTES: Optional LED digital display is shown in the photo.

3 INSTRUMENT SPECIFICATIONS

3.1 Technical Specications

GAS TYPE

Carbon Monoxide (CO) Combustible Gases (catalytic)

Hydrogen (H

), Methane (CH4), Propane (C3H8)

Nitrogen Dioxide (NO

) Nitric Oxide (NO) Oxygen (O

)

Refrigerants (solid state)

R22, R134A, R402A, R404A, R407C, R410A, R422A, R422D, R507A

Sulphur Dioxide (SO

)

TVOCs (solid state)

Opening for TWO integral sensors to monitor diused air and gas.

Common application is

engine exhaust: gasoline

or diesel sensors are both integral in the GEM type E version.

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MECHANICAL

Standard Enclosure General purpose PVC Standard Weight 600 g (1.2 lb) Standard Size 5.3” x 6.8” x 2.6” (135 mm x 173 mm x 66 mm)

Watertight Enclosure Water / dust tight polycarbonate Watertight Weight 700 g (1.4 lb) Watertight Size 5.1” x 7.1” x 4.0” (130 mm x 181 mm x 102 mm)

ELECTRICAL

Power Requirement 15 - 30 VDC or 12 - 28 VAC Current Draw Approximately 125 mA

Wiring

VDC three-conductor shielded VAC four-conductor shielded

Circuit

Analog design with microprocessor and user settable time delays, accessible with DIP switches on circuit board.

Fuse Automatic resetting thermal

INPUT / OUTPUT

Outputs Linear 4 - 20 mA (single)

Distance

Maximum 500 ft between controller and remote solid state sensor using minimum 18 gauge wire.

Relays

Two S.P.D.T. dry contact relays, rated 5 amps @ 240 VAC.

NOTES:

1. System is congured such that all relays are “FAIL SAFE” (relay coils are always energized in non-alarm state).

2. Relays are “common” to both channels (activated by either channel).

USER INTERFACE

Display

Common set of LED indicating lights for “Power”, “Fail”, “Low (Warning) Gas Alarm”, “High Gas Alarm”

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Audible

Integral piezo audible alarm rated 80 dB @ 10’ c/w door mounted

silence push-button.

NOTES: Audible alarm & silence push-button are right side mounted on water tight enclosure.

Time Delays

Delay “ON” (on make),

DIP switch

Delay “OFF” (on break),

DIP switch

Audible (on make),

DIP switch

Low alarm relay: 2 minutes High alarm relay: 5 minutes

Also known as “minimum run time”

Low alarm relay: 10 minutes High alarm relay: not available

10 minutes

NOTES: Time delays can be changed by user.

Reference Section 7 Operation. DIP switches are still used to enable or disable time delays.

SENSOR

Enclosure Molded PVC

Integral

Electrochemical only

NOTES: All integral electrochemical gas sensors are packaged as “smart” sensor modules.

Remote

Solid State sensor for refrigerants and TVOCs Catalytic sensor for combustible gases Analog transmitter, LPT-A or LPT (4 – 20 mA signal)

ENVIRONMENTAL (sensor dependant)

Operating Temperature -20°C to 50°C (-5°F to 120°F) Operating Humidity 15 - 90% RH non-condensing

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CERTIFICATION

CSA Certied UL Certied

3.2 Standard Enclosure Dimensions

3.3 Watertight Enclosure Dimensions

5.25” (133 mm)

2.625” (67 mm) 6.75” (172 mm)

5.13” (130 mm)

7.13” (181 mm)4.0” (102 mm)

4.38” (102 mm)

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4 SENSOR SPECIFICATIONS

4.1 Common Sensor Specications

Carbon Monoxide (CO)

Type Electrochemical Response Time <30 seconds to 90% of signal response Operating Temperature 0°C to 50°C (32°F to 120°F) Repeatability ± 10% of set point Life Span 3 years in air (under normal conditions)

Nitric Oxide (NO)

Type Electrochemical Response Time <30 seconds to 90% of signal response Operating Temperature 0°C to 50°C (32°F to 120°F) Repeatability ± 10% of set point Life Span 2 years in air (under normal conditions)

Nitrogen Dioxide (NO

)

Sulphur Dioxide (SO

)

Type Electrochemical Response Time <30 seconds to 90% of signal response Operating Temperature 0°C to 50°C (32°F to 120°F) Repeatability ± 10% of set point Life Span 2+ years in air (under normal conditions)

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Temperature (°C or °F) Range -20°C to 40°C (-4°F to 104°F)

4.2 Remote Sensor Specications

1. Remote sensor module: The remote sensor housing accommodates one catalytic or one solid-

state sensor. 2. Any 4-20 mA analog transmitters manufactured by CETCI (LPT-A or LPT series).

Combustible Gases

Type Catalytic Response Time <10 seconds to 90% of signal response Operating Temperature -10°C to 50°C (14°F to 122°F) Repeatability ± 10% of set point Life Span 5 years in air (under normal conditions) Typical Gas Examples Hydrogen (H

), Propane (C3H8), Methane (CH4)

Refrigerants

Type Solid state Response Time <120 seconds to 90% of signal response Operating Temperature 0°C to 40°C (32°F to 104°F) Long Term Drift < 5% signal loss / month at ambient temperatures Repeatability ± 10% of set point Life Span 5 years in air (under normal conditions)

Typical Gas Examples

R11, R12, R22, R134A, R404A, R407C, R410A, R422A, R422D, R438A, R507A

4.3 Calibration Extending Firmware (CEF) and Sensor Aging

GEM systems with integral electrochemical sensors have been programmed with our CEF (Calibration Extending Firmware). This rmware takes into consideration the aging of the electrochemical CO, NO and NO2 sensors so that less frequent calibrations are acceptable in non-critical applications such as parking garages. The system tracks the age of the sensor and automatically compensates for the degraded output of the sensor as it ages.

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Critical Environment Technologies GEM-II Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual