Critical Environment Technologies cGas Detector Operation Manual

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Rev. A | 2019.07

cGas Detector Digital Transmitter

Operation Manual

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cGas Detector Digital Transmitter - Operation Manual Rev. A | 2019.07

TABLE OF CONTENTS

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

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

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

1.3 Service Policy ...................................................................................................7

1.4 Copyrights ........................................................................................................8

1.5 Disclaimer ........................................................................................................8

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

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

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

2.2 Key Features ...................................................................................................10

3 INSTRUMENT SPECIFICATIONS .................................................................11

3.1 Technical Speci cations ..................................................................................11

3.2 Enclosure Dimensions ....................................................................................14

4 SENSOR SPECIFICATIONS ...........................................................................15

4.1 Single Channel Gas Sensor Options ................................................................15

4.2 Dual Channel Gas Sensor Options ...................................................................17

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

5 INSTRUMENT FEATURES .............................................................................18

5.1 Exterior Enclosure ..........................................................................................18

5.2 Interior System Layout ................................................................................... 19

6 SYSTEM OPERATION & CONFIGURATION ................................................20

6.1 Navigating the Menu Structure ......................................................................20

6.2 Accessing the Menu with Passcodes ...............................................................21

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6.3 Display Settings .............................................................................................22

6.3.1 Adjust Display Brightness ................................................................................23

6.3.2 Display Con gurations ....................................................................................23

6.3.3 Display or Hide Line 1 and/or 2 .......................................................................24

6.4 Alarm Status, Fault Detection and Communication Failure Noti cations ........25

6.5 Setting Channel Alarm Setpoints, Direction and Hysteresis ............................26

6.6 Enable / Disable Channels ..............................................................................29

6.7 Change Units (degC or degF) of Temperature Readings .................................. 30

6.8 Temperature and/or Relative Humidity O set ................................................ 31

6.9 Test Functions ................................................................................................ 32

7 MODBUS AND BACNET CONFIGURATION...............................................34

7.1 Changing Communication Type (Modbus®/BACnet®) in the Field ..................34

7.2 Con guring Modbus® Settings .......................................................................35

7.2.1 Change Modbus® MAC Address .......................................................................35

7.2.2 Change Baud Rate ........................................................................................... 36

7.2.3 Modbus® Holding Registers ............................................................................37

7.3 Con guring BACnet® Settings ........................................................................ 37

7.3.1 Change BACnet® MAC Address ........................................................................37

7.3.2 Change BACnet® Instance ID ...........................................................................38

7.3.3 Change BACnet® Baud Rate .............................................................................38

7.3.4 BACnet® PICS Information ...............................................................................39

8 PLUG & PLAY SMART SENSOR REPLACEMENT .......................................46

8.1 How to Replace or Add a New Smart Sensor Board ........................................46

8.2 Read from Sensor ...........................................................................................47

8.3 Write to Sensor ...............................................................................................49

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9 CALIBRATION ................................................................................................49

9.1 Calibration Speci cations ............................................................................... 49

9.1.1 Gas ..................................................................................................................49

9.1.2 Regulators & Flow ........................................................................................... 50

9.1.3 Adapters..........................................................................................................50

9.1.4 Calibration Frequency .....................................................................................50

9.1.5 Gas Testing Frequency (Bump Testing) ............................................................51

9.1.6 Sticky Gases.....................................................................................................51

9.2 Calibrating the Internal Sensor(s) ..................................................................51

9.2.1 Set Calibration Gas Value .................................................................................51

9.2.2 Zero (Null) Calibration .....................................................................................53

9.2.3 Span Calibration ..............................................................................................54

9.3 Troubleshooting Calibration ...........................................................................56

9.3.1 Calibration Adapter Plug Doesn’t Fit ................................................................56

9.3.2 Zero Fault ........................................................................................................ 56

9.3.3 Span (Calibration) Fault ................................................................................... 57

9.3.4 Zero Override ...................................................................................................57

9.3.5 Span Override..................................................................................................57

9.4 Calibrating an Oxygen Sensor ........................................................................58

10 ACCESSORIES .............................................................................................60

10.1 Splash Guard (Option -S) ..............................................................................60

10.2 Calibration Adapter Clip ”Cal Clip” ................................................................ 60

10.3 Splash Guard for Sticky Gases (Option -SN) ..................................................61

10.4 Metal Protective Guard ................................................................................62

10.5 Calibration Kit ..............................................................................................62

11 MAINTENANCE ..........................................................................................63

12 TROUBLE SHOOTING ................................................................................64

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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.

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:

______________________________________________________

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1.2 Warranty Policy

Critical Environment Technologies Canada Inc. (the manufacturer) warrants this gas monitoring 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. This warranty is limited to the mechanics of the physical sensor

components and as such, should the sensor become defective within this warranty period, we will repair or replace it at our discretion. This warranty does not extend to sensors that have been poisoned by external compounds such as, but not limited to, extreme gas concentrations, paint fumes, excessive dust, debris, etc. or to sensors that have been improperly zeroed, c alibrated or altered in any way. If it is determined within 90 days of purchase that a sensor is malfunctioning or unable to remain calibrated due to no fault of its placement or treatment, the instrument may be sent back to the factory for a free calibration service.

The warranty status may be a ected if the instrument has not been operated, calibrated or maintained as per the instructions in the instrument’s Operation Manual or if the instrument has been abused, damaged or altered 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 (whether under warranty or not) must be pre-authorized by obtaining a return merchandise authorization (RMA) number. Contact the manufacturer for an RMA number and the procedures required for product transport.

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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.

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.

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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 par t, in any manner or format, without the written permission of CETCI.

Modbus® is a registered trademark of Gould Inc. Corporation. BACnet® is a registered trademark of American Society of Heating, Refrigeration and Air Conditioning (ASHRAE).

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 forgoing 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.

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

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manufacturer reserves the right to make changes at any time without notice. In addition, due to improvements made to our products, there may be information in this manual that does not exist in the version of the product the user has. Should you detect any error or omission in this manual, or should you want to inquire regarding upgrading the device’s  rmware, 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: [email protected] 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.

2 INTRODUCTION

2.1 General Description

Thank you for purchasing our cGas Detector Transmitter. The cGas Detector is a one or two channel gas detection transmitter that o ers  exible customization options with the purpose of meeting

your speci c application and budgetary requirements. Ideal for monitoring toxic, combustible and refrigerant gases in non-hazardous (non-explosion rated) environments such as enclosed parking facilities, commercial HVAC, greenhouses, recreational facilities, refrigeration plants, manufacturing plants and other light industrial applications.

The sensors utilized in this device are accurate enough to measure to Occupational Health & Safety

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(OHS) hazardous levels for toxic gases. The transmitter operates by di usion.

2.2 Key Features

• 1 or 2 gas channel operation

• User con gurable Modbus® RS-485 RTU or BACnet® MS/TP communication protocols for communication with a Controller or Building Automation System (BAS)

• Easy Plug & Play Smart sensor replacement at end of life

• Customizable sensor and option combinations to meet speci c application requirements

• 24 volt DC or (ground referenced) AC power

• 4-conductor shielded network wiring (daisy-chain)

• In  eld upgradable  rmware/con guration via USB connection

• Bright LCD display

• Option -LT: Low temperature package for improved usability in cold environments

• Option -RHT: Relative Humidity and Temperature sensor (digital CO and CO2 models only)

• Option -S: Splash guard, factory installed, IP54 rated enclosure

• Option -SN: Splash guard, factory installed, for Cl2, HCI or O3 sensors only

• Standard water / dust tight, corrosion resistant enclosure (drip proof)

• Copper coated interior to reduce RF interference

• RoHS compliant circuit boards

• Auto resetting fuse

NOTE: Some gas sensor types and Options are restricted to certain models.

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

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3 INSTRUMENT SPECIFICATIONS

3.1 Technical Speci cations

MECHANICAL

Enclosure

Weight 400 g / 14 oz

Size 127 mm x 127 mm x 71 mm / 5.0 in x 5.0 in x 2.8 in

USER INTERFACE

Display (standard)

Display (Option -LT)

USB Port

Push Buttons

Audible Alarm none

ABS / Polycarbonate, IP54 rating with splash guard installed. Copper coated interior to reduce RF interference.

2-line by 16 character graphic LCD, black on green, text prompting for calibration operation and fault indications. Installer

con gurable to suppress reading display.

Optional OLED display for improved usability in low temperature applications, 2-line by 16 character, yellow on black, text prompting for calibration operation and fault indications. Installer con gurable to suppress reading display.

Internal port for USB memory stick connection for  eld con guration/ rmware upgrades

Initiate calibration and menu options with internal UP, DOWN and ENTER push buttons

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ELECTRICAL

16 - 30 VDC, 3 W, Class 2

Power Requirement

12 - 27 VAC, 50-60 Hz, 3 VA, Class 2 24V recommended.

Digital Wiring

VDC or VAC (ground referenced) four-conductor shielded 16 AWG stranded within conduit, network wiring (daisy-chain)

Fuses Automatic resetting thermal

INPUT/OUTPUT

Modbus® ID: 100 (default, con gurable)

Communication

Modbus® RTU (version

1.1b3) RS-485

Baud rate: 19,200 (default, con gurable) Data bits: 8 Start bits: 1 Stop bits: 1 Parity: none

BACnet® MS/TP; ANSI/ASHRAE standard 135 BACnet®

Communication protocol: 135-2012

Communication BACnet® MS/TP (version 1 rev 14) RS-485

Baud Rate: 76,800 (default)

Base Address: 270 (default)

MAC Address: 100 (default)

Parity: no parity

Stop bits: 1

Data bits: 8

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RH and Temperature (Option -RHT)

Available for CO2 and CO models only

ENVIRONMENTAL

Operating Temperature

0°C to 40°C / 32°F to 104°F (standard)

-40°C to 40°C / -40°F to 104°F (with Option -LT)

Operating Humidity 15 - 90% RH non-condensing

Pollution Degree Degree 2

Altitude below 2,000 m

CERTIFICATION

Model: CGAS-D-XXX S/N: CGASD1807B00010 Rating: 16-30 VDC, 3W, Class 2 12-27 VAC, 50-60 Hz, 3VA, Class 2

CERTIFIED FOR ELECTRIC SHOCK & ELECTRICAL FIRE HAZARD ONLY. LA CERTIFICATION ACNOR COUVRE UNIQUEMENT LES RISQUES DE CHOC ELECTRIQUE ET D’INCENDIE D’ORIGINE ELECTRIQUE.

Conforms to: CSA-C22.2 No. 205-12, UL508 (Edition 18):2018 Conforms to: EMC Directive 2014/30/EU, EN 50270:2015, Type 1, EN61010 Conforms to: FCC. This device complies with par t 15 of the FCC Rules, Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

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3.2 Enclosure Dimensions

Above dimensions are shown with optional splash guard. Without splash guard, thickness is 71 mm / 2.8 in. The area required for enclosure door to be open 90 degrees is 178 mm / 7.0 in or 254 mm / 10.0 in for fully open. With the optional splash guard installed, the enclosure is IP54 rated.

NOTE: During calibration, the sensor response time will be slower with a splash guard installed.

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4 SENSOR SPECIFICATIONS

4.1 Single Channel Gas Sensor Options

Electrochemical Sensors Part Numbers Range Lifespan

Ammonia (NH3) CGAS-D-NH3 0 - 500 ppm ± 2 years

Carbon Monoxide (CO) CGAS-D-LCO 0 - 200 ppm ± 6 years

Chlorine (Cl2) CGAS-D-CL2 0 - 5.0 ppm ± 3 years

Chlorine Dioxide (ClO2) CGAS-D-CLO2 0 - 1 ppm ± 2 years

Ethylene (C2H4) CGAS-D-C2H4 0 - 200 ppm ± 2 years

Ethylene Oxide (C2H4O) CGAS-D-EETO 0 - 20 ppm ± 2 years

Fluorine (F2) CGAS-D-F2 0 - 1 ppm ± 2 years

Formaldehyde (CH2O) CGAS-D-CH2O 0 - 5 ppm ± 2 years

Hydrogen (H2) CGAS-D-EH2 0 - 2,000 ppm ± 2 years

Hydrogen Sulphide (H2S) CGAS-D-H2S 0 - 50 ppm ± 2 years

Hydrogen Chloride (HCl) CGAS-D-HCL 0 - 30 ppm ± 2 years

Hydrogen Cyanide (HCN) CGAS-D-HCN 0 - 30 ppm ± 2 years

Hydrogen Fluoride (HF) CGAS-D-HF 0 - 10 ppm ± 2 years

Nitric Oxide (NO) CGAS-D-NO 0 - 100 ppm ± 2 years

Nitrogen Dioxide (NO2) CGAS-D-NO2 0 - 10 ppm ± 6 years

Oxygen (O2) CGAS-D-O2 0 - 25% Vol ± 3 years

Ozone (O3) CGAS-D-O3 0 - 2 ppm ± 2 years

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Phosphine (PH3) CGAS-D-PH3 0 - 5 ppm ± 2 years

Silane (SiH4) CGAS-D-SIH4 0 - 20 ppm ± 2 years

Sulphur Dioxide (SO2) CGAS-D-SO2 0 - 20 ppm ± 2 years

Refrigerant Sensors Part Numbers Range Lifespan

Refrigerant R22 CGAS-D-SR22 0 - 2,000 ppm ± 5 years

Refrigerant R134A CGAS-D-SR134A 0 - 2,000 ppm ± 5 years

Refrigerant R402A CGAS-D-SR402A 0 - 2,000 ppm ± 5 years

Refrigerant R404A CGAS-D-SR404A 0 - 2,000 ppm ± 5 years

Refrigerant R407A CGAS-D-SR407C 0 - 2,000 ppm ± 5 years

Refrigerant R410A CGAS-D-SR410A 0 - 2,000 ppm ± 5 years

Refrigerant R422D CGAS-D-SR422D 0 - 2,000 ppm ± 5 years

Refrigerant R438A CGAS-D-SR438A 0 - 2,000 ppm ± 5 years

Refrigerant R507A CGAS-D-SR507A 0 - 2,000 ppm ± 5 years

TVOCs CGAS-D-STVOC 0 - 500 ppm ± 5 years

Catalytic Sensors Par t Numbers Range

Hydrogen (H2) CGAS-D-CH2-100 0 - 100% LEL ± 5 years

Methane (CH4) CGAS-D-CCH4-100 0 - 100% LEL ± 5 years

Propane (C3H8) CGAS-D-CC3H8-100 0 - 100% LEL ± 5 years

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PID Sensors Part Numbers Range

TVOC CGAS-D-SPL 0 - 30 ppm

TVOC CGAS-D-SPH 0 - 300 ppm

usage / application dependent

Infrared Sensors Part Numbers Range

Carbon Dioxide (CO2)

CGAS-D-CO2-5K 0 - 5,000 ppm

CGAS-D-CO2-5% 0 - 5% vol

± 6 years

4.2 Dual Channel Gas Sensor Options

Two Internal Electrochemical Sensors

Part Numbers Range Lifespan

Carbon Monoxide (CO) and Nitrogen Dioxide (NO2)

Carbon Monoxide (CO) and Ethylene (C2H4)

Carbon Monoxide (CO) and Hydrogen Sulphide (H2S)

Carbon Monoxide (CO) and Oxygen (O2)

Carbon Monoxide (CO) and Nitric Oxide (NO)

CGAS-D-LCO-NO2

CGAS-D-LCO-C2H4 0 - 200 ppm

CGAS-D-LCO-H2S

CGAS-D-LCO-O2

CGAS-D-LCO-NO

0 - 200 ppm 0 - 10 ppm

0 - 200 ppm 0 - 50 ppm

0 - 200 ppm 0 - 25% vol

0 - 200 ppm 0 - 100 ppm

± 6 years

± 6 years ± 2 years

± 6 years ± 3 years

2-3 years

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Hydrogen Sulphide (H2S) and Sulphur Dioxide (SO2)

CGAS-D-H2S-SO2

0 - 50 ppm 0 - 20 ppm

2+ years

4.5 Calibration Extending Firmware (CEF) and Sensor Aging

The cGas Detector with integral electrochemical sensor(s) have been programmed with our CEF.

This  rmware takes into consideration the aging of the electrochemical CO and NO2 sensors so that less frequent calibrations are required in less-critical applications such as parking garages. The system tracks the age of the sensor and automatically compensates for the reduced output of the sensor as it ages.

5 INSTRUMENT FEATURES

5.1 Exterior Enclosure

•

Ž Œ

•

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ys yo

NUMBER FEATURE FUNCTION

•

Door Hinge

Display

Sensor Opening

Door Screw S ecures door shut

Lock Slot For security padlock or tie

Secures door to base and allows easy opening and closing

LCD display (standard display)

A B

Allows gas di usion into sensor

5.2 Interior System Layout

NUMBER FEATURE FUNCTION

Programming Buttons

Access menu options and program functions using buttons inside the enclosure. (Arrow up, Enter, Arrow down)

•

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RS-485 Communication

•

Terminals

USB Connection For  rmware and con guration upgrades

Termination Resistor

•

Sockets for sensors and

•

Options boards

Pluggable power and signal terminal for connection to controller and next transmitter.

Network termination resistor. “IN” position includes 120 ohm resistor.

Sensor boards and Options boards plug into the main board using these sockets

6 SYSTEM OPERATION & CONFIGURATION

The cGas Detector continuously monitors target gas concentrations on one or two con gured channels. It must be connected to a controller, control panel or BAS / BMS / DDC system; the cGas Detector is not a standalone gas detection system.

6.1 Navigating the Menu Structure

The three programming push-buttons inside the enclosure are used to navigate through the cGas Detector menu structure. Refer to Section 5.1 Exterior Enclosure for location photo.

ENTER begins a process or moves you to the next screen in the same menu.

The UP or DOWN buttons are used to enter characters/numbers and to navigate to the next menu item.

A line under a character or number indicates that is the space into which you are entering a character or number. Use the ENTER button to move to the next space. Or use the UP or DOWN button to change the value in that space.

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The > symbol indicates that you can edit the menu line item.

After entering and con rming a value you can either Exit the menu or press the UP button to move to the next item in that menu. All menus are circular and will bring you back to the Exit screen. Press ENTER to Exit.

6.2 Accessing the Menu with Passcodes

You have to enter a passcode to access the menu. From the normal operation screen, press ENTER to access the password entry screen. Use the UP or DOWN arrow to scroll to the desired number. Press ENTER to move to the next position. Continue until the full code is entered and press ENTER when  nished.

CODE NAME DESCRI PTION

0001 Test Menu • Test Reading

If con gure as a MODBUS device

• Comm Type

• Comm Mac

1001 Basic Menu

1014 Display Menu

• Comm Baud

If con gured as a BACNET device

• Comm Type

• Comm Mac

• Comm Baud

• Instance ID

• Display Type

• Brightness

• Display Line 1

• Display Line 2

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• Selected Channel

• Selected Alarm Level

2012 Alarms Menu

• Set Alarm Setpoint

• Set Alarm Direction (Ascending/Descending)

• Set Alarm Hysteresis

• Selected Channel

• Set Channel Priority

• Enable/Disable Channel

3022 Con g Menu

• Read Sensor

• Write to Sensor

• Selected Priority

• Priority CH Required

• Selected Channel

• Set Calibration Gas

• Calibrate Zero

3032 Calibrate Menu

• Calibrate Span

• Temperature O set*

• Humidity O set*

• Temperature Units*

*displayed only if -RHT option is installed

6.3 Display Settings

The LCD display can display up to 2 lines of 16 characters. It is backlit green with black text. The backlight can be turned o , but in normal operation, as con gured from the factory, the display is backlit. After warm up and upon normal operation, the display will show the current gas level reading for each channel that it has been con gured.

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Pressing the UP or DOWN button allows you to scroll through a series of information screens showing the model name, serial number and  rmware version; the communication type, ID

and baud rate, the gas type and AD counts; the channel number, gas type and gas level and the temperature and relative humidity levels (if option is installed).

6.3.1 Adjust Display Brightness

The brightness of the display and the information displayed can be changed as per your preference.

From the main display, press ENTER. Enter passcode 1014 using the UP button and ENTER button.

Enter Password 1014

Press ENTER to access the Display Menu.

DisplayMenu Press Enter

Brightness 100

Press ENTER. Use the UP button to change the numeric value. Move to the next digit by pressing ENTER. When  nished, press ENTER to con rm and Exit.

Brightness >050

Confirm? 50

NOTE: You cannot enter a number higher than 100. Entering a value of 000 turns the backlight o completely. With ambient light the text can still be read on the display.

6.3.2 Display Con gurations

The default display set from the factory is normal mode which displays the gas type, gas reading and gas units for each con gured channel.

CO NO2

00PPM

PPM

The information can be reduced to just the gas type by changing the setting to the minimal mode display.

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********-CO-********* ********-NO2-********

From the main display, press ENTER. Enter passcode 1014 using the UP button and ENTER button.

Enter Password 1014

Press ENTER to access the Display Menu.

DisplayMenu

Press ENTER. Use the UP button to change the display type and press ENTER to save and Exit.

Press Enter

Display Type >Minimal

Display Type Normal

6.3.3 Display or Hide Line 1 and/or 2

The display can show a maximum of two lines of data. Choose what you want to see on line 1 and line 2 from four available options.

From the main display, press ENTER. Enter passcode 1014 using the UP button and ENTER button.

Enter Password 1014

Press ENTER to access the Basic Menu.

Display Menu Press Enter

Press the UP button until you see Display Line 1 (or Display Line 2).

Display Line 1 >CO

Press ENTER. Using the UP or DOWN buttons, scroll through the display lines to choose from:

• Gas Type (ie. CO)

• Gas Type (ie. NO2)

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• Temp + Humidity (if installed)

• O

The factory default is to display the gas types for the sensors installed. If only one gas sensor is installed, Display Line 2 will show the Temp + Humidity (if installed) or it will be blank.

NOTE: The Temp + Humidity option is only available with CO and CO2 gas sensors, or by itself.

6.4 Alarm Status, Fault Detection and Communication Failure Noti cations

If a channel is in alarm, the following letters will be displayed at the end of the line for that channel.

• low for low alarm

• mid for mid alarm

• high for High alarm

CO NO2

0.7

PPM

low

NO2

The cGas Detector has built in fault detection, and in the event of a problem with the measurement circuitry the transmitter will indicate a fault condition on the display. Normal operation will resume once the fault condition has been corrected.

NOTE: To ensure safe operation, monthly bump tests should be done. A damaged solid state or catalytic sensor will go open circuit and a dead or damaged electrochemical sensor will usually appear to the transmitter as a zero gas reading. Both instances will cause an incorrect reading during a bump test and create a fail indication during calibration.

NOTE: If a question mark ? is displayed then the system is in a minor fault and a re-zeroing is recommended.

1.0

PPM mid

CO NO2

1.5

PPM

high

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If there is a communication failure between the cGas Detector and the controller or BAS, the screen will display COMM at the end of the line.

CO NO2

00COMM

COMM

For a list of Fault Codes, refer to Section 12 Troubleshooting.

6.5 Setting Channel Alarm Setpoints, Direction and Hysteresis

The cGas Detector is con gurable as a one or two channel gas detector and each channel can be con gured with LOW, MID and HIGH gas alarm setpoints in an ascending or descending direction. The number entered as the setpoint is the exact number/level of gas concentration at which the device will indicate an alarm condition and trigger a predetermined response from the controller or control panel. The alarm set points can be changed at any time and do not require a calibration before, during or after changing them.

NOTE: The cGas Detector DOES NOT HAVE an internal alarm. Gas readings are sent to the BAS or DDC and if the readings hit an alarm setpoint the BAS or DDC will trigger whatever type of alarm device or emergency protocol it has been con gured to trigger.

Almost all installations will use the factory default alarm setpoints. Default setpoints are as follows:

SENSO R GAS TY PE

STANDAR D

RANGE

Carbon Dioxide (CO2) 0 - 2,000 ppm 800 ppm 1,000 ppm 1,200 ppm

Carbon Dioxide (CO2) 0 - 5.0% vol 0.15% vol 0.20% vol 0.50% vol

Carbon Monoxide (CO) 0 - 200 ppm 25 ppm 50 ppm 100 ppm

Nitrogen Dioxide (NO2) 0 - 10 ppm 0.7 ppm 1.0 ppm 1.5 ppm

LOW

ALAR M

MID

ALAR M

HIGH

ALAR M

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Combustibles (catalytic) 0 - 100% LEL 10% LEL 15% LEL 20% LEL

For a complete list of all sensors please go to: https://www.critical-environment.com/support/faq/suggested-alarm-setpoints

An Ascending alarm is used when monitoring a gas that becomes hazardous in increasing quantity. The normal/safe gas level is below the alarm setpoint and when the gas level increases, reaching and exceeding the alarm setpoint, the alarm is tripped.

A Descending alarm is used when monitoring a gas that becomes hazardous in decreasing quantity, such as oxygen. The normal gas level for oxygen is above the alarm setpoint so if the oxygen level starts to deplete and reaches/goes below the alarm setpoint, the alarm will trip. You can set a hysteresis value that will be common for all alarm setpoints on that channel.

Hysteresis is the di erence between the ON point and OFF point of the alarm and the value entered will determine at what gas concentration the alarm will stop. If the alarm setpoint is 100 ppm and the hysteresis is 5 ppm, when the gas concentration reaches or exceeds 100 ppm, the alarm will come on. The alarm will stay on until the gas concentration reduces to 95 ppm (5 ppm below the alarm setpoint).

The purpose of hysteresis is to prevent the alarm from chattering on and o repetitively if the gas

 uctuates just above and just below 100 ppm, which would happen if the hysteresis is set to 0. Likewise, if the device triggers relays, repetitive turning on and o could cause them to burn out.

From the main display, press ENTER. Enter passcode 2012 using the UP button and ENTER button.

Enter Password 2012

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Press ENTER to access the Alarms Menu.

Alarms Menu Press Enter

In the Selected Channel menu, con rm the correct channel is showing.

Selected Channel CO

If you want to choose a di erent channel, press Enter and use the UP button to scroll to the next channel. Press ENTER and continue.

Selected Channel >NO2

Press the UP button until you see Selected Alarm, con rm the correct alarm level is showing.

Selected Alarm Low Alarm

If you want to choose a di erent alarm level (ie. Mid or High), press Enter and use the UP button to scroll to the next alarm level. Press ENTER and continue.

Selected Alarm

Press the Up button until you see Alarm Setpoint, con rm the desired number is showing.

>Mid Alarm

Alarm Setpoint 25 PPM

If you want to enter a di erent alarm setpoint, press Enter and use the UP and ENTER buttons to change the number. Press ENTER to con rm and continue.

Alarm Setpoint >050 PPM

Confirm? >50 PPM

Press the Up button until you see Alarm Direction, con rm the correct direction (ascending or descending) is showing.

Alarm Direction ASCENDING

If you want to change the direction, press Enter and use the UP button to scroll to the next value. Press ENTER to continue.

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Alarm Direction >DESCENDING

Press the Up button until you see Alarm Hysteresis, con rm the desired value is showing.

Alarm Hysteresis 005 PPM CO

If you want to change the value, press Enter and use the UP and ENTER buttons to change the value. Press ENTER to con rm and continue.

Alarm Hysteresis >010 PPM CO

Confirm? >10 PPM

6.6 Enable / Disable Channels

This setting allows you to enable or disable the channel(s) that are already con gured in the device. If the device has one channel, you can enable or disable that one channel. If the devices has two channels you can independently enable or disable each channel. You may also hide the lines of disabled channels. Refer to Section 6.3.3 Display or Hide Line 1 and/or 2.

NOTE: If the device has one channel, enabling the second channel does not add an operational channel to the device.

A disabled channel acts as if it does not exist, it will not show gas readings. A disabled channel will show on the normal display with four dashes in the middle of the line:

From the main display, press ENTER. Enter passcode 3022 using the UP button and ENTER button.

Press ENTER to access the Con g Menu.

CO NO2

Enter Password 3022

Config Menu Press Enter

---- PPM 0 PPM

76.4 degF

0 PPM

----%RH

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In the Selected Channel menu, con rm the correct channel is showing.

Selected Channel CH1 CO

If you want to choose a di erent channel, press ENTER and use the UP button to scroll to the next value. Press ENTER and continue.

Selected Channel >Temperature

The list to choose from will depend on included sensors and options:

• CH1

• CH2

• Temperature (if installed)

• Humidity (if installed) Press the UP button to  nd Channel En/Dis. To make a change, press ENTER and then the UP button to choose Enable or Disable and press ENTER to select and Exit.

ChannelEn/Dis Enabled

----degF

6.7 Change Units (

ChannelEn/Dis >Disable

0 PPM 38%RH

C or oF) of Temperature Readings

NOTE: This menu item only applies if the cGas Detector has the -RHT option installed.

You can change the factory con gured temperature unit type from Celsius to Fahrenheit (or vice versa) very easily.

From the main display, press ENTER. Enter passcode 3032 using the UP button and ENTER button.

Enter Password 3032

Press ENTER to access the Calibrate Menu.

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Calibrate Menu Press Enter

In the Selected Channel menu, if Temperature is not displayed, press ENTER and use the UP button

to scroll to  nd Temperature. Press ENTER.

Selected Channel CO

Selected Channel >Temperature

Use the UP button to  nd Temperature Unit. If you want to change the unit type, press ENTER.

Temperature Unit Celsius

Press the UP button to choose Fahrenheit press ENTER and ENTER to exit.

Temperature Unit >Fahrenheit

6.8 Temperature and/or Relative Humidity O set

NOTE: This menu item only applies if the cGas Detector has the -RHT option installed. NOTE: Depending on the con guration, the device will show the temperature in either Celcius or

Fahrenheit. The units can be changed at any time, refer to Section 6.7 Change Units (degC or degF) of Temperature Readings.

The temperature and relative humidity sensors come pre-calibrated from the factory. If you  nd that the readings on the cGas Detector are higher or lower than another measurement device, you can adjust the reading by setting an o set value so the reading is more accurate. The Temperature o set value is a number of degrees and the Humidity o set value is a percentage, both in either direction of 0.

From the main display, press ENTER. Enter passcode 3032 using the UP button and ENTER button.

Enter Password 3032

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Press ENTER to access the Calibrate Menu.

Calibrate Menu Press Enter

In the Selected Channel menu, if Temperature (or Humidity) is not displayed, press ENTER and use the UP button to scroll to  nd the item you are looking for. Press ENTER.

Selected Channel CO

Selected Channel >Temperature

Selected Channel >Humidity

Use the UP button to  nd Temperature Adj (or Humidity Adj). If you want to change the o set value, press ENTER. Change the o set value using the UP or DOWN and ENTER buttons.

Temperature Adj >-4.0 degC

Humidity Adj >+02 %RH

Press ENTER to con rm the value is correct. If you entered the wrong value, press the UP button to move the cursor to N and press ENTER and reenter the value.

Confirm?

>-4.0 degC

>+2 %RH

Confirm?

6.9 Test Functions

The test functions listed in this menu will depend on the con guration of the individual cGas Detector. For each gas channel, you can manually enter a gas reading value of your choice (within the range of the sensor) that will be sent over the digital network to test the connection and con gured responses between the cGas Detector and the DDC/BAS. You can do the same for relative humidity and temperature if the -RHT option is installed.

From the main display, press ENTER. Enter passcode 0001 using the UP button and ENTER button.

Press ENTER to access the Test Menu.

Enter Password 0001

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Test Menu Press Enter

In the Selected Channel menu, con rm the correct channel is showing.

Selected Channel CO

If you want to choose a di erent channel, press ENTER and use the UP button to scroll to the next value. Press ENTER and continue.

Selected Channel >NO2

The list to choose from will depend on included sensors and options:

• Gas Type (ie. CO)

• Gas Type (ie. NO2)

• Temperature

• Humidity Press the UP button to  nd Test Reading. To make a change, press ENTER and then use the UP, DOWN and ENTER buttons to enter the value.

Test Reading 0 PPM NO2

Test Reading >10.0 PPM NO2

Press ENTER and then again to Con rm Y.

Confirm?

>10.0 PPM NO2

Test Reading

10.0 PPM NO2

The test will start as soon as you press ENTER to con rm and will remain in the test mode as long as the Test Reading screen remains untouched. To stop the test, press the UP

or DOWN button. Test another reading value or press ENTER to Exit.

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7 MODBUS AND BACNET CONFIGURATION

The cGas Detector can be changed from Modbus® to BACnet® or vice versa in the  eld.

7.1 Changing Communication Type (Modbus®/ BACnet®) in the Field

When the communication type is changed, the device will reset, which will brie y interrupt communications on the network it is connected to.

From the main display, press ENTER. Enter passcode 1001 using the UP button and ENTER button.

Press ENTER to access the Basic Menu.

Press ENTER. Use the UP or DOWN buttons to choose MODBUS or BACNET or Cancel. Press ENTER. If you have changed the communication type, the device will display Reset Device.

Press ENTER and the cGas Detector will power o and on. This will cause a brief interruption in communications if the cGas Detector is on a network.

NOTE: If you change the Comm Type, make sure you make the necessary changes to the corresponding MAC, Baud and Instance ID as appropriate. Refer to the following Sections 7.2 Con guring Modbus® Settings or 7.3 Con guring BACnet® Settings.

Enter Password 1001

Basic Menu Press Enter

Comm Type >BACNET

Comm Type MODBUS

Reset Device

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7.2 Con guring Modbus® Settings

If a complete system (controller with digital transmitters and peripherals) is ordered from the factory, it will be shipped precon gured with the appropriate Modbus® settings.

Factory Default Modbus® Settings

• Modbus® ID = 100 (default, con gurable)

• Baud rate =19,200 (default, con gurable)

• Data bits = 8

• Stop bits = 1

• Parity = none

If you are not using the cGas Detector with a CETCI controller but are adding it to an existing system the transmitters may require changes to the default Modbus® settings in order for communication to be successful between devices. Make sure your network connection is complete, the network termination switches are set appropriately and all the devices are con gured with the same baud rate, character format, etc. Each device must have its own unique Modbus® ID.

7.2.1 Change Modbus® MAC Address

All devices on the same network must have a unique Modbus ID. The range of numbers that can be used as a Modbus® MAC address is 100 to 255.

From the main display, press ENTER. Enter passcode 1001 using the UP button and ENTER button.

Press ENTER to access the Basic Menu.

The Comm Type displayed should be MODBUS. Press the UP button until you see Comm MAC.

Enter Password 1001

Basic Menu Press Enter

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Comm Type MODBUS

Comm MAC 000

Press ENTER. Use the UP or DOWN buttons to change the numeric value. Move to the next digit by

pressing ENTER. When  nished, press ENTER to con rm and again to Exit.

Comm MAC >101

Confirm? >101

7.2.2 Change Modbus® Baud Rate

All devices on the same network must have the same baud rate. The default Modbus® baud rate for all CETCI Modbus® devices is 19,200.

From the main display, press ENTER. Enter passcode 1001 using the UP button and ENTER button.

Enter Password 1001

Press ENTER to access the Basic Menu.

Basic Menu Press Enter

The Comm Type should be Modbus. Press the UP button until you see Comm Baud.

Comm Type MODBUS

Comm Baud 19,200

Press ENTER. Use the UP or DOWN buttons to scroll through the baud rates to choose from:

• 9,600

• 14,400

• 19,200 (default, con gurable)

• 38,400

• 57,600

• 76,800

• 115,200 Select the preferred baud rate by pressing ENTER to save. Press the UP button and ENTER to Exit.

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7.2.3 Modbus® Holding Registers

If you have speci c requirements, have any questions or require clari cation about the Modbus® holding registers, please contact CETCI for assistance.

7.3 Con guring BACnet® Settings

The cGas Detector can be con gured with BACnet® output to communicate with a BAS, DDC or similar control panel.

7.3.1 Change BACnet® MAC Address

The factory set default BACnet® MAC address is 100. The MAC ID along with the Instance ID make up the complete ID for the device. Each device requires a unique ID in order to communicate with the BAS / DDC. A MAC address should be set for each digital cGas Detector during installation.

From the main display, press ENTER. Enter passcode 1001 using the UP button and ENTER button.

Press ENTER to access the Basic Menu.

The Comm Type should be BACnet. Press the UP button until you see Comm MAC.

Press ENTER. Use the UP button to change the numeric value. Move to the next digit by pressing ENTER. When  nished, press ENTER to con rm and Exit.

Enter Password 1001

Basic Menu Press Enter

Comm Type BACnet

Comm MAC >111

Comm MAC 100

Confirm? >111

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7.3.2 Change BACnet® Instance ID

Every device on a BACnet® network must have a unique Instance ID. An Instance ID is the Vendor ID (or Base ID) followed by the device’s MAC address. CETCI’s Vendor ID is 270. If the device’s MAC ID is 100, then the Instance ID would be 270100.

From the main display, press ENTER. Enter passcode 1001 using the UP button and ENTER button.

Enter Password 1001

Press ENTER to access the Basic Menu.

Basic Menu Press Enter

The Comm Type should be BACnet. Press the UP button until you see Instance ID.

Comm Type BACnet

Instance ID 270100

Press ENTER. Use the UP button to enter the numeric value. Move to the next digit by pressing ENTER. When  nished, press ENTER to con rm and Exit.

Instance ID >0270111

Confirm? >270111

7.3.3 Change BACnet® Baud Rate

All devices on the same BACnet® network must have the same baud rate. The default BACnet® baud rate is 76,800.

From the main display, press ENTER. Enter passcode 1001 using the UP button and ENTER button.

Enter Password 1001

Press ENTER to access the Basic Menu.

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Basic Menu Press Enter

The Comm Type should be BACnet. Press the UP button until you see Comm Baud.

Comm Type BACnet

Comm Baud 19200

Press ENTER. Using the UP or DOWN buttons, scroll through the baud rates to choose from:

• 9,600

• 14,400

• 19,200

• 38,400

• 57,600

• 76,800 (default, con gurable)

• 115,200 Select the preferred baud rate by pressing ENTER to save. Press the UP button and then ENTER to Exit.

7.3.4 BACnet® PICS Information

Critical Environment Technologies Canada Inc. (CETCI) has been granted the BACnet® Testing Laboratories (BTL) certi cation for the CGAS Detector Family upon passing the BTL requirements for the BACnet® Smart Actuator (B-SA) designation. To follow is the BACnet® Protocol Implementation Conformance Statement (PICS) information that can also be found on the BACnet® International website at http://www.bacnetinternational.org

Date: April 2019 Vendor Name: Critical Environment Technologies Canada Inc. Product Name: CGAS Detector Family Product Model Numbers: CGAS-D, CGAS-DP, CGAS-SC Application Software Version: 1.1 Firmware Revision: 3.7.12.0

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BACnet® Protocol Version/Revision: 14 Product Description:

The CGAS Detector product line is a group of customizable two channel gas detectors featuring a range a possible gases and options. The various gases are added to the device using plug and play “smar t sensor” boards, which attach to the main board within the enclosure. The main board handles communication back to a controller or building management system via  eld con gurable

Modbus® RTU or BACnet® MS/TP.

BACnet® Standardized Device Pro le (Annex L):

*BACnet® Operator Workstation (B-OWS) *BACnet® Building Controller (B-BC) *BACnet® Advanced Application Controller (B-AAC) *BACnet® Application Speci c Controller (B-ASC) *BACnet® Smart Sensor (B-SS)

RBACnet® Smart Actuator (B-SA)

List all BACnet® Interoperability Building Blocks Supported (Annex K):

BIBB Service Responds to

DS-RP-B DS-WP-B DM-DDB-B DM-DOB-B

Segment Capability:

Segment requests supported Window Size 480 Segment requests supported Window Size 480

ReadProperty-B WriteProperty-B Dynamic Object Device Binding-B Dynamic Object Binding-B

X X X X

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Standard Object Types Supported:

An object type is supported if it may be present in the device. For each standard Object Type supported provide the following data:

1. Whether objects of this type are dynamically creatable using the CreateObject service

2. Whether objects of this type are dynamically deletable using the DeleteObject ser vice

3. List of the optional properties suppor ted

4. List of all properties that are writable where not otherwise required by this standard

5. List of proprietary properties and for each its propert y identi er, datatype, and meaning

6. List of any property range restrictions

NOTE: None of the object types listed in this section is dynamically creatable or dynamically deletable.

NOTE: The BACnet conformance codes are as follows:

O - Optional (may be required under some conditions) R - Required, but not required to be writable (may be required to be writable under some conditions) W - Not only required, but also required to be writable

The following codes are used in this document to describe how the properties are implemented:

R/W Read/write R/O Read-only R/O=value Implemented as a read-only with the indicated value

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Device Object

Property

Object_Identi er Object_Name Object_Type System_Status Vendor_Name Vendor_Identi er Model_Name Firmware_Revision Application_Software_Version Location

Protocol_Version Protocol_Revision Protocol_Services_Supported Protocol_Object_Types_Supported Object_List

Max_APDU_Length_Accepted Segmentation_Supported APDU_Timeout Number_Of_APDU_Retries Max_Master Device_Address_Binding Data_Base_Revision Max-Info-Frames

BACnet®

Conf Code

R R R R R R R R R O

R R R R R

R R R R O R R O

Implementation

R/O R/O R/O=”device” R/O=”operational” R/O R/O R/O R/O R/O R/W

R/O=1 R/O=14 R/O R/O R/O

R/O=480 R/O=”none” R/W=7000 R/W=1 R/O=127 R/O=empty list R/O R/O=1

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Analog Input

Property

Object_Identi er Object_Name Object_Type Present_Value Status_Flags Event_State Out_Of_Service Units Property_List Description

BACnet®

Conf Code

R R R R R R R R R O

Implementation

R/O R/O R/O=”analog input” R/O R/O R/O=”normal” R/O=FALSE R/O R/O R/W

Analog Output

Property

Object_Identi er Object_Name Object_Type Present_Value Status_Flags Event_State Out_Of_Service Units Priority_Array Relinquish_Default

BACnet®

Conf Code

R R R

R R R R R R

Implementation

R/O R/O R/O=”analog-output” R/W R/O=”all normal” R/O=”normal” R/O=FALSE R/O R/O R/W

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Property_List Description

Binary Output

Property

Object_Identi er Object_Name Object_Type Present_Value Status_Flags Event_State Out_Of_Service Polarity Priority_Array Relinquish_Default Description

Data Link Layer Options:

R O

BACnet®

Conf Code

R R R

R R R R R R O

R/O R/W

Implementation

R/O R/O R/O=”binary-output” R/W R/O=”all normal” R/O=”normal” R/O=FALSE R/W R/O R/O R/W

*BACnet® IP, (Annex J) *BACnet® IP, (Annex J), Foreign Device *ISO 8802-3, Ethernet (Clause 7) *ANSI/ATA 878.1, 2.5 Mb. ARCNET (Clause 8) *ANSI/ATA 878.1, RS-485 ARCNET (Clause 8), baud rate(s) ___________

RMS/TP Master Node (Clause 9), baud rate(s): 9600, 19200, 38400, 57600, 76800, 115200

*MS/TP Slave (Clause 9), baud rate(s): *Point-To-Point, EIA 232 (Clause 10), baud rate(s): *Point-To-Point, modem, (Clause 10), baud rate(s): *LonTalk, (Clause 11), medium: __________ *Other:

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Device Address Binding:

Is static device binding supported? (This is currently necessary for two-way communication with MS/TP slaves and certain other devices.) RYes *No

Networking Options:

*Router, Clause 6 - List all routing con gurations, e.g., ARCNET-Ethernet,

Ethernet-MS/TP, etc.

*Annex H, BACnet Tunneling Router over IP *BACnet®/IP Broadcast Management Device (BBMD)

Does the BBMD support registrations by Foreign Devices? *Yes RNo

Character Sets Supported:

Indicating support for multiple character sets does not imply that they can all be supported simultaneously.

RANSI X3.4 *IBM™/Microsoft™ DBCS *ISO 8859-1 *ISO 10646 (UTF-8)

*JIS C 6226 *ISO 10646 (UCS-2) *ISO 10646 (UCS-4)

Network Security Options:

RNon-secure Device - is capable of operating without BACnet® Network Security

BACnet® Communications Defaults:

Baud rate =78,800 (default, con gurable) Base address = 270 (default, con gurable) MAC address = 100 (default, con gurable) Parity = no parity Stop bits = 1 Data bits = 8

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If you have speci c requirements, have any questions or require clari cation about the BACnet®

PICS information, please contact CETCI for assistance.

8 PLUG & PLAY SMART SENSOR REPLACEMENT

A sensor will need to be replaced when it does not have enough sensitivity to respond to a bump test or it repeatedly fails calibration. Similarly, the sensor may need to be replaced if the application

requirements change and a di erent gas needs to be monitored.

A Plug & Play Smart Sensor Board is a sensor that is fastened to a small circuit board with a memory chip that contains the sensor’s calibration and con guration information. When a replacement

smart sensor board or a brand new gas smart sensor board is installed, the information it contains must be written to the main circuit board.

8.1 How to Replace or Add a New Smart Sensor Board

Smart board replacement sensors arrive pre-calibrated and factory con gured. After you physically replace the smart sensor board, you have to Read the data stored in the new sensor board up to the main board, overwriting the old sensor’s calibration information. After an appropriate warm up period (24 hours), you may want to do a bump test to con rm the response from the sensor.

Power OFF the unit during the physical replacement of the sensor boards.

With the door open, look at the smart sensor boards, CH1 is the socket on the left side and CH2 is the socket on the right side.

If replacing an existing sensor, unscrew the smart sensor board you want to replace and gently pull it out of the socket. Insert the new smart sensor board and screw it in place.

If adding a new smart sensor to an empty socket, make sure to remove the perforated foam circle in the sensor cavity, then insert the smart board and screw it in place.

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NOTE: If the second sensor is a CO sensor smart board, it will be shipped with a small plastic short sensor adapter. After removing the foam, insert the short sensor adapter before plugging the CO smart sensor board into the socket.

When installing a second smart sensor after initially ordering a single smart sensor model, you will need to remove the center circular cut out of the foam in the second sensor vent area before installing the smart board.

8.2 Read From Sensor

During this process, the main board Reads the calibration and con guration information stored in the smart sensor board and saves the information, overwriting the existing calibration and con guration information for that sensor in the main board.

With the unit powered ON, from the main display, press ENTER. Enter passcode 3022 using the UP button and ENTER buttons.

Press ENTER to access the Con g Menu.

In the Selected Channel menu, con rm the desired channel is showing. If you want to choose a

di erent channel, press ENTER and use the UP button to scroll to the next value. Press ENTER and continue.

Enter Password 3022

Config Menu Press Enter

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Selected Channel CH1 CO

Press the UP button to  nd Read From Sensor. Press ENTER.

Read from Sensor CH1 (Left)

Read from Sensor >YES

Press the UP button to change from NO to YES and press ENTER to select. The system will Read the new calibration information to the main board. Press ENTER to exit.

NOTE: Make sure you are reading from the correct sensor - left vs right.

8.3 Write to Sensor

This process forces a Write of the calibration and con guration information stored in the main board to the smart board sensor. Every time a change is made on the cGas Detector, the main circuit board Writes the change to the smart sensor board automatically. However, there may be instances when you may want to force Write the changes to the smart sensor board, such as if the memory of the smart sensor board gets corrupted.

From the main display, press ENTER. Enter passcode 3022 using the UP button and ENTER buttons.

Press ENTER to access the Con g Menu.

In the Selected Channel menu, con rm the desired channel is showing.

If you want to choose a di erent channel, press ENTER and use the UP button to scroll to the next value. Press ENTER and continue.

Enter Password 3022

Config Menu Press Enter

Selected Channel CH1 CO

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Selected Channel >CH2 NO2

Press the UP button to  nd Write to Sensor. Press ENTER.

Write to Sensor CH2 (right)

Press the UP button to change from NO to YES and press ENTER to select. The system will Write the sensor con guration information to the smart sensor board. Press ENTER to exit. Repeat for the second channel if required.

NOTE: Make sure you are writing to the correct sensor - left vs right.

9 CALIBRATION

9.1 Calibration Speci cations

9.1.1 Gas

Calibration span gas cylinders should have at least ± 5% accuracy and have a current date stamp. Gas generators should have a current dated cell installed.

Service personnel should  ow zero emissions air or 20.9% volume O2 (scrubbed of hydrocarbons) before attempting to null adjust (zero) toxic gas sensors. In some cases nitrogen (N2) can be substituted for zero air when null adjusting electrochemical sensors. Contact CETCI for clari cation.

The type of gas mixture, how old the gas is and what temperature it has been stored at will a ect repeatability during  eld calibration.

IMPORTANT NOTES:

• Ox ygen sensors require 99.9% nitrogen (N2) for a true zero. We recommend doing the span

 rst, followed by zeroing.

• Carbon dioxide sensors require 99.9% nitrogen (N2) for a true zero. If the cGas Detector has

a splash guard you will need to  ow the nitrogen for approximately 4 minutes BEFORE you

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enter the Calibrate Zero menu. Same when  owing CO2 calibration gas,  ow for 4 minutes BEFORE you enter the Calibrate Span menu.

• Catalytic sensors require oxygen to work and thus the user MUST  ow clean air or oxygen to

obtain a true zero and the span gas must have “air” balance, not N2 balance.

9.1.2 Regulators & Flow

Calibration gases that are lighter than or the same weight as air (CO, O2, etc.) should be  owed at

0.5 LPM. Gases heavier than air (NO2, etc.) should be  owed between 0.5 and 1.0 LPM. Fixed  ow regulators provide more accuracy.

9.1.3 Adapters

The proper calibration adapter should be utilized to allow the gas to properly di use around the sensor. The calibration adapter plug for a cGas Detector with an internal sensor without a splash guard is part number CET-7000-CAP. For a cGas Detector with a splash guard, use part number CET-4700-SCC or use the Cal Clip hands free adapter, part number CET-SGC.

9.1.4 Calibration Frequency

• Parking garage detectors: Once every 12 months

• OHS applications: Once every 6 months (OHS: Occupational Health & Safety)

• For best performance and to meet published speci cations: once every six months

NOTE: A calibration label should be applied after every calibration to con rm work performed and the date it was con rmed. If a controller is involved, the alarm set points should be indicated on a label on the front door of the enclosure so anyone working in the environment can be aware.

Equipment: Calibration Kit, Calibration gases

Users can order the calibration kit, calibration accessories and / or gases from any CETCI authorized distributor or you can supply your own gas and equipment as long as the gas meets the minimum

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speci cations. CETCI does not ship gas cylinders outside of Canada.

9.1.5 Gas Testing Frequency (Bump Testing)

For the purpose of safety in OHS applications, sensors should be gas tested (bump tested) once every month to con rm response and alarm activation.

9.1.6 Sticky Gases

Sticky gases, such as Ozone (O3), Chlorine (Cl2) Chlorine Dioxide (ClO2), Hydrogen Chloride (HCl), Hydrogen Cyanide (HCN), Nitrogen Dioxide (NO2) and Phosphine (PH3) adhere to surfaces such as tubing and splash guards. The cGas Detector can be ordered with a special splash guard if

con gured with a sticky gas sensor. When calibrating with sticky gases we suggest using Te on lined tubing so the gas doesn’t adhere to the tubing, reducing the concentration of the  ow of gas. Also keep the length of the tubing as short as possible, no more than 0.91 to 1.22 m / 3 - 4 ft so the gas  ow concentration doesn’t lessen over the distance from the gas cylinder to the sensor. It is also suggested that when calibrating a Chlorine sensor, you use a chlorine gas generator due to the instability of Chlorine gas in a cylinder and the fact that it is di cult to get accurate readings from that source.

9.2 Calibrating the Internal Sensor(s)

Calibration has three processes - Set Calibration Gas Value, Span and Zero. The Span and Zero calibrations can be done in any order. However when calibrating an Oxygen sensor we suggest the Zero calibration be done before the Span calibration. Refer to Section 9.4 Calibrating an Ox ygen Sensor. When calibrating a CO2 sensor,  ow the nitrogen gas and the span gas for 4 minutes before entering the Calibrate Zero and Calibrate Span menus.

9.2.1 Set Calibration Gas Value

Check to make sure that the calibration gas value con gured in the device matches the gas concentration of the calibration gas cylinder you are using. This is especially important if you are not using the same Cal gas concentration that was used previously to calibrate the device. How

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much gas the sensor detects is directly related to the Cal gas setting and the actual concentration of calibration gas used during calibration.

From the main display, press ENTER. Enter passcode 3032 using the UP button and ENTER button.

Enter Password 3032

Press ENTER to access the Calibrate Menu.

Calibrate Menu

In the Selected Channel menu, con rm the desired channel is showing.

Press Enter

Selected Channel CO

If you want to choose a di erent channel, press ENTER and use the UP button to scroll to the next channel. Press ENTER and continue.

Selected Channel >NO2

Press the UP button to accept the displayed calibration gas value if it is correct. Or press ENTER and change the value using the UP or DOWN buttons.

Calibration Gas 50 PPM CO

Calibration Gas >100 PPM CO

When  nished pressed ENTER and then ENTER again to con rm and ENTER to exit.

Confirm? >100 PPM

The factory default calibration gas concentrations are:

SENSO R GAS TY PE CALI BRATION GAS LEVEL*

Carbon Dioxide (CO2) 1000 PPM

Carbon Dioxide (CO2) 1.0 % VOL

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Carbon Monoxide (CO) 100 PPM

Nitrogen Dioxide (NO2) 5 PPM

Combustibles 20% LEL

* subject to change when required

9.2.2 Zero (Null) Calibration

Before trying to zero toxic gas sensors, zero emissions air or 20.9% volume O2 (scrubbed of

hydrocarbons) should be  owed over the sensors. In some cases nitrogen (N2) can be substituted for zero air when null adjusting electrochemical sensors. Oxygen and CO2 sensors require 99.9% N2 for a true zero. Catalytic sensors require oxygen to work and thus the user MUST  ow clean air or oxygen to obtain a true zero and the span gas must have “air” balance, not N2 balance. If using ambient air to zero the gas detector, make sure the environment has clean air or the process could result in a Zero fault.

NOTE: To exit the Zero Calibration at any time, press ENTER.

From the main display, press ENTER. Enter passcode 3032 using the UP button and ENTER button.

Enter Password 3032

Press ENTER to access the Calibrate Menu.

Calibrate Menu

In the Selected Channel menu, con rm the desired channel is showing.

Press Enter

Selected Channel CO

If you want to choose a di erent channel, press ENTER and use the UP button to scroll to the next channel. Press ENTER and continue.

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Selected Channel >NO2

Press the UP button to  nd Calibrate Zero.

Calibrate Zero 100 AD

Press ENTER if using ambient air or attach the regulator to the cylinder of zero air, insert the calibration adapter into the sensor opening on the front of the enclosure door (refer to Section 9.3.1 Calibration Adapter Plug if the adapter will not  t). Press ENTER to start the Zero calibration. The display will show a countdown from 20 seconds.

Zeroing 47AD

Zero Success 56AD

18s

When the process has  nished and the Zero calibration was accepted, press ENTER and use the UP button navigate to Exit and press ENTER to exit. Remove the cylinder of zero gas. If the Zero calibration was not successful refer to Section 9.3.2 Zero Fault.

9.2.3 Span Calibration

Span calibration is  owing a known concentration of the target gas over the sensor to adjust the output signal to match the gas concentration. It resets the sensor’s electronic circuit against a known concentration of target gas to correct drift and keep linearity.

NOTE: To exit the Span Calibration at any time, press ENTER.

From the main display, press ENTER. Enter passcode 3032 using the UP button and ENTER button.

Enter Password 3032

Press ENTER to access the Calibrate Menu.

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Calibrate Menu

In the Selected Channel menu, con rm the desired channel is showing.

Press Enter

Selected Channel CO

If you want to choose a di erent channel, press ENTER and use the UP button to scroll to the next channel. Press ENTER and continue.

Selected Channel

Use the UP button to  nd Calibrate Span. Press ENTER.

>NO2

Calibrate Span 4000 AD

Con rm the span calibration gas level. It is important to make sure that the span gas level value matches the calibration gas concentration you are using to calibrate the sensor. Press ENTER to con rm value is correct. (If the value is not correct, press the UP button to move the cursor to N and press ENTER. Change the cal gas level using the UP and ENTER buttons.)

Confirm CalGas >100 PPM

Press ENTER to con rm. Attach the regulator to the span gas cylinder and  ow the span gas over the sensor. You have 120 seconds to start  owing the gas. If the gas isn’t detected, the display will return to Calibrate Span.

Waiting for Gas 53AD

35s

When the gas is detected the display will show stabilizing for a countdown from 120 seconds and then spanning for a countdown from 60 seconds.

Stabilizing 1961AD

Span Success 1956 AD 19

82s

Spanning 1957AD

21s

When the process has  nished and the Span calibration was accepted, press ENTER and use the UP button navigate to Exit and press ENTER to exit. Remove the cylinder of span gas.

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If the Span calibration was not successful, refer to Section 9.3.3 Span Fault.

Repeat the calibration steps above for each enabled gas channel.

NOTE: If an inappropriate concentration of span gas is applied during calibration, calibration may succeed but it does not mean the equipment has been calibrated properly. CETCI is not responsible for improperly calibrated transmitters. Follow manual instructions carefully.

NOTE: After 5 minutes of inactivity on any screen, the display will return to the normal operation.

9.3 Trouble Shooting Calibration

This section is intended to aid in correcting issues that may arise during the calibration procedure. If you are unable to correct a problem or you have questions, please contact our service department at [email protected] or 604-940-8741 (Local) or 1877-940-8741 (Toll Free).

9.3.1 Calibration Adapter Plug Doesn’t Fit

Use a slight twisting motion as you gently push the calibration adapter plug (p/n: CET-7000-CAP) into the sensor opening. If it is hard to insert, moisten the O-ring seal slightly then try re-inserting it. If the splash guard is installed, use the Cal Clip (p/n: CET-SGC).

NOTE: Response time will be slower with the splash guard installed.

9.3.2 Zero Fault

If the zeroing process fails, the cGas Detector will show a Zero fault. This will happen if the ambient gas readings are at an unacceptable level due to not enough clean air - there is enough residual target gas in the environment or other gases that are interfering with the sensor seeing oxygen.

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9.3.3 Span Fault

If the cGas shows a Span fault after trying to calibrate, it is possible that the sensor is dead or the device isn’t seeing the gas (cylinder is empty, regulator or adapter plug is not attached properly, tube is blocked, kinked, etc.).

Span Fault 197 AD 1

Check all connections and possible interferences and try a complete calibration procedure from the beginning again to see if this corrects the fault. If a second calibration does not resolve the fault then the sensor needs to be replaced. Over time, a sensor degrades and when it has gone beyond an acceptable level, it has reached its end of life and will no longer pass a calibration. If replacing the sensor does not correct the fault, please contact our service department at [email protected].

9.3.4 Zero Override

If the gas level (possible residual gas) is too high, but still within the override range, the display will indicate that an override is required.

Override?

-1PPM

To override the value use the UP button to select Y and press ENTER. To keep the original zero value, leave the indicator on N and press ENTER.

9.3.5 Span Override

During the Span calibration, readings are taken and from the results sensitivity is calculated and compared to the original sensitivity of the sensor at the time of installation. If this sensitivity is below the override range, but above the fault limit, the display will indicate that an override is required. To override the value use the UP button to select Y and press ENTER. To keep the original value, leave the indicator on N and press ENTER.

Override? 1953 AD 19

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9.4 Calibrating an Oxygen Sensor

When calibrating an Oxygen sensor, a Span calibration should be done  rst, then a Zero calibration. The Zero calibration is done using a cylinder of 99.9% Nitrogen (N2) gas.

NOTE: During the Span calibration,  owing the Nitrogen will cause the Oxygen readings to decrease which may trigger the alarms to go o . You may want to disable the alarms during the

calibration of an Oxygen sensor.

To calibrate the Oxygen sensor, from the main display, press ENTER. Enter passcode 3032 using the UP button and ENTER button.

Press ENTER to access the Calibrate Menu.

In the Selected Channel menu, con rm the O2 channel is showing.

If you need to choose a di erent channel, press ENTER and use the UP button to scroll to the next channel. Press ENTER and continue.

Enter Password 3032

Calibrate Menu Press Enter

Selected Channel O2

Press Enter to continue. Use the UP button to  nd Calibrate Span. Press ENTER.

Calibrate Span 4000 AD

Confirm CalGas

>20.9 %VOL

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The factory default calibration gas concentrations are:

SENSO R GAS TY PE C ALIBRATION GAS LEVEL

Oxygen (O2) 20.9% VOL

Either use a cylinder of 20.9% Oxygen or if you are con dent of the air quality, the oxygen in the breathing environment can be used as a fairly accurate source of span gas (be careful not to exhale in the direction of the Oxygen sensor vent). It is not recommended to use this procedure for all span adjustments of Oxygen sensors.

Attach the regulator to the span gas cylinder and  ow the span gas over the sensor. You have 120 seconds to start  owing the gas. If the gas isn’t detected, the display will return to Calibrate Span.

Waiting for Gas 53AD

35s

When the gas is detected the display will show stabilizing for a countdown from 120 seconds and then spanning for a countdown from 60 seconds.

Stabilizing 1961AD

Span Success 1956 AD 19

82s

Spanning 1957AD

21s

When the process has  nished and the Span calibration was accepted, remove the cylinder of span gas. Refer to Section 9.3.5 Span Override if the Span calibration was not successful.

Attach the regulator to the cylinder of Nitrogen (N2), insert calibration adapter into the sensor opening on the front of the enclosure door (refer to Section 9.3.1 Calibration Adapter Plug if the adapter will not  t). Flow the gas for a couple minutes and continue  owing while you press the UP button to  nd Calibrate Zero.

Calibrate Zero

Press ENTER to start the Zero calibration. The display will show a countdown from 19 seconds.

100 AD

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Zeroing 47AD

18s

When the process has  nished and the Zero calibration was accepted, press ENTER to Exit and remove the cylinder of Nitrogen (N2) gas.

Zero Success 56AD

Refer to Section 9.3.4 Zero Override if the Zero calibration was not successful.

10 ACCESSORIES

10.1 Splash Guard (Option -S)

The splash guard attaches to the front of the enclosure to protect the sensor during water spray or washdown applications. It is factory installed and when attached the enclosure meets IP54 standards. To calibrate a device with a splash guard, use the Cal Clip. This type of splash guard can be used with any gas type except sticky gases. Refer to Section 10.3 Splash Guard (Option -SN) for more information.

NOTE: The splash guard will slow down the response time of the sensor.

10.2 Calibration Adapter Clip “Cal Clip” (p/n: CET-SGC)

To calibrate a cGas Detector with a factory installed splash guard (Option -S), attach the Cal Clip around the splash guard to allow the use of both hands during calibration. The small barb hose

 tting accommodates standard or Te on tubing of 1/8” (3.175 mm) ID and 3/16” (4.762 mm) ID.

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NOTE: The Cal Clip is designed to prevent entry or exit of air except via the hose barb  tting, therefore it must be removed during normal operation or else the gas readings will not be accurate.

10.3 Splash Guard for Sticky Gases (Option -SN)

This specially designed Splash Guard for sticky gases is an optional factory installed accessory for

Calibration Adapter Clip Splash Guard

protection of a sticky gas sensor (such as Chlorine, Chlorine Dioxide, Ozone or Hydrogen Chloride) in wet and/or wash down environments.

NOTE: The Splash Guard for sticky gases comes with a specialized Calibration Adapter Slide

Cap which MUST be removed during normal operation or else the gas readings will not be

accurate.

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10.4 Metal Protective Guard (p/n: SCS-8000-RSG)

The metal protective guard (p/n: SCS-8000-RSG) is made of heavy gauge, galvanized metal and helps protect against abrasive damage, theft and vandalism to the transmitters. The 16-gauge galvanized steel has 13 mm (½ in) square openings in the front to allow gas and air to  ow through

to the sensor. With only four slotted mounting holes, installation and removal for gas detector servicing is easy. In applications where sticky gases are being monitored, such as Ozone, Chlorine or Hydrogen Chloride and frequent wash-downs are required, the metal guard can be ordered with a splash cover (p/n: SCS-8000-WSG). The splash cover is made of a material called PC CPE that allows the sticky gas to reach the sensor without adhering to the vent opening, plus protects the sensor from water ingress.

Enclosure 16 gauge galvanized steel

Weight 800 g (28 oz)

Size 178 mm W x 160 mm H x 91 mm D (7.0” W x 6.3” H x 3.6” D)

10.5 Calibration Kit (p/n: CET-715A-CK1)

Calibration Kit contains the items necessary for common  eld and shop calibrations. It comes in a durable, hard plastic carrying case and includes a regulator, adapters, humidi cation chamber, brass  tting, hand tools and tubing. It does not include cylinders of gas. These must be ordered separately.

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Calibration Kits and gases are available from the CETCI fac tory. Many gases, but not all are carried

The

in inventory. Check with any CETCI authorized distributor for availability of speci c gas types. Gas

cylinders cannot be shipped from Canada to other countries, including the USA.

11 MAINTENANCE

The cGas Detector transmitter requires virtually no maintenance other than regular calibration of the sensor(s). There are no replaceable components except the sensors.

The transmitter should be monitored for possible damaging conditions.

• The sensor vents should be kept free of dirt or soot build up.

• If in a damp location, source of water should be shielded from contacting the top of the transmitter.

• If located in a working area, the front of the transmitter should be kept clear.

• If painting is to be done in the same area as the transmitter, the transmitter needs to be protected from over spray and the sensor vent should be covered so as to not receive paint fumes. Paint fumes may damage and / or reduce the life of the sensor.

It is important to ensure that excess water and/or dust is not somehow entering the enclosure and physically damaging the circuit board or internal components.

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12 TROUBLE SHOOTING

cGas Detector won’t power up. (blank display)

Is the power properly connected? Check the wiring connections. Refer to Section 6.7 Wiring Connection in the cGas Detector Digital Installation Manual.

Display shows “ZERO FAULT” message.

The cGas Detector is unable to complete the zeroing (null) process. If using ambient air, make sure there are no contaminants or residual target gas in the air. If using a cylinder of oxygen, use 20.99% volume, scrubbed of hydrocarbons. In some cases nitrogen (N2) can be substituted for zero air when null adjusting electrochemical sensors. Oxygen sensors require 99.9% N2 for a true zero. Catalytic sensors require oxygen to work and thus the user MUST  ow clean air or oxygen to obtain a true

zero and the span gas must have “air” balance, not N2 balance.

Display shows “SPAN FAULT” message.

cGas Detector display shows “COMM” message.

Modbus® or BACnet output signal has not been connected properly. Check the wiring connections and the network settings.

Device cannot be seen by the Controller and/or the BAS / DDC on the Modbus® network.

• Check the Baud rate. All devices in the network must have the same Baud rate.

• Check that local area network wiring is correct, especially the A and B lines to make sure they are not swapped between devices on the network.

• Check the Modbus® ID. Each device must have a unique ID assigned to it.

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Device cannot be seen by the Controller and/or the BAS / DDC on the BACnet® network.

• Check the Baud rate. All devices in the network must have the same Baud rate.

• Check to make sure the device has a unique ID assigned to it, which is made up of the MAC ID and the Base ID.

• Check that local area network wiring is correct, especially the A and B lines to make sure they are not swapped between devices on the network.

Frequent, unexpected alarm reading reported to BAS/DDC. Check to see if EMI and RF interference is causing the equipment to react this way. Refer to Section 6.5.2 EMI and RF Interference Considerations in the cGas Detector Digital Installation Manual for more information.

When calibrating a CO2 sensor, Calibrate Zero keeps failing or the Calibrate Span passes but the gas level reading keeps climbing.

Start the calibration process over. Flow the nitrogen gas for 4 minutes before entering the Calibrate

Zero menu. Then  ow the span gas for 4 minutes before entering the Calibrate Span menu.

List of Possible cGas Error Codes:

(appears on the display in place of the units for a channel)

Code Description

Check to make sure the smart sensor board is present and installed properly in the socket. If installed, the cGas

F01 Negative Fault Reading

detects the sensor signal is too far below its zeroAD. May be caused by a sensor that is temperature or humidity sensitive. Zeroing the sensor will normally resolve this.

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cGas cannot communicate with the smart board. Ensure

F02 Smart Board Fault

the smart board is installed and installed on the correct side (left) if a single channel unit. Otherwise power cycle or replace the sensor smart board.

F03

CO2 Communication Fault

cGas cannot communicate with the CO2 sensor even though it can communicate with the smart board. Power cycle or replace the sensor smart board.

The internal smart sensor board gainPOT chip has failed.

F04 POT chip has failed

If a power cycle does not resolve this, replace the sensor smart board.

Error in reading Smart

F05

Board

FO6 SB ID Mismatch

cGas detected an error in the smart board ID. Use “Write to Sensor” for the indicated channel (passcode 3022).

Firmware expected a di erent smart board than what is in the sensor socket.

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NOTES

Page 68

Critical Environment Technologies Canada Inc.

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

Toll Free: +1.877.940.8741

Tel: +1.604.940.8741 Fax: +1.604.940.8745

www.critical-environment.com

CGAS-D-20190715-Rev-A