CET ART Operation Manual

Infrared refrigerant transmitter

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Operation Manual

Rev. 5 | 2018.03

ART

Infrared Refrigerant Transmitter

www.critical-environment.com

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Page 1 Operation Manual Rev. 5 | 2018.03 Infrared Refrigerant Transmitter www.critical-environment.com...
Page 2: Table Of Contents
Rev. 5 | 2018.03 ART - Operation Manual 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...
Page 3 Rev. 5 | 2018.03 ART - Operation Manual 6.2 Mounting Locations ..................23 6.2.1 General Placement Guidelines ................ 23 6.2.2 Machinery Rooms ................... 23 6.2.3 Refrigerated Spaces..................24 6.2.4 Chillers ......................25 6.3 Mounting Procedure ..................25 7 WIRING AND CONFIGURATION ..............28 7.1 Overview ......................28...
Page 4 Rev. 5 | 2018.03 ART - Operation Manual 9.2.1 Overview ......................40 9.2.2 Con guring Parameters .................. 40 9.3 Completing Setup ..................49 10 FUNCTIONAL TESTS AND GAS ADJUSTMENTS ........50 10.1 Warnings and Cautions ................50 10.2 Bump Test vs Adjusting Detector Response ..........51 10.3 Bump Testing ....................52...
Page 5: Policies
Rev. 5 | 2018.03 ART - Operation Manual 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.
Page 6: Warranty Policy
Rev. 5 | 2018.03 ART - Operation Manual 1.2 Warranty Policy 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.
Page 7: Copyrights
Rev. 5 | 2018.03 ART - Operation Manual 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.
Page 8: Revisions
Rev. 5 | 2018.03 ART - Operation Manual 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.
Page 9: Introduction
2 INTRODUCTION 2.1 General Description Thank you for purchasing our ART Infrared Refrigerant Transmitter. The ART is a single channel, non-dispersive infrared, xed gas detector which can detect a wide range of refrigerant gases. The fast-responding sensor accurately detects refrigerant gas leaks without cross-interference from combustible or toxic gases.
Page 10: Instrument Specifications
Rev. 5 | 2018.03 ART - Operation Manual • On-board alarm relay • LED real-time display with on-board audible and visual alarms 3 INSTRUMENT SPECIFICATIONS 3.1 Technical Speci cations GAS TYPE Refrigerants R22, R32, R123, R134a, R404a, R407a, R407c, R407f. R410a, R422a, R422d, R427a, R448a,...
Page 11 Rev. 5 | 2018.03 ART - Operation Manual INPUT / OUTPUT Analog Outputs 4-20 mA, 0-5V, 0-10 V, 1-5V, 2-10V Baud rate: 9,600 or 19,200 (selectable) Start bits: Data bits: Modbus RTU over Parity: none, odd, even (programmable) RS-485 Stop bits:...
Page 12 Rev. 5 | 2018.03 ART - Operation Manual Buzzer; enable/disable Audible Alarm Visual Alarm Red 4-digit LED display Alarm Delay Selectable; 0 to 15 minutes Fault Monitoring Fault codes presented to user ENVIRONMENTAL Operating -30°C to 40°C (-22°F to 104°F)
Page 14: Sensor Specifications
4 SENSOR SPECIFICATIONS 4.1 List of Available Internal Refrigerant Gases The ART is shipped factory certi ed and calibrated to the target refrigerant. For more information on Parameter 11 and refrigerant con guration instructions, see Section 9 Setting and Con guring the Parameters.
Page 15: Special Considerations For Infrared Sensors
Rev. 5 | 2018.03 ART - Operation Manual R448a 0 - 3,500 ppm ±5% 7-10 yrs ART-B-R448A R449a 0 - 3,500 ppm ±5% 7-10 yrs ART-B-R449A ART-B-R452A R452a 0 - 3,500 ppm ±5% 7-10 yrs 0 - 3,500 ppm ±5%...
Page 16: Changing Gas Types And Accuracy
No minimum level of oxygen is required; operates in the absence of, or enriched presence of oxygen. The ART can be re-calibrated in the eld to new target gases. Use optional calibration instructions in Section 10 Functional Tests and Gas Adjustments for increased accuracy when detecting a new target gas that is di erent from the “as shipped”...
Page 17 Rev. 5 | 2018.03 ART - Operation Manual The gas detector may be changed to respond to any of the other listed refrigerants (see Parameter P.-11 in Section 9.2 Setting Parameters). If changed, the gas detector will have a lower accuracy for the target refrigerant (without calibration). In this example, that accuracy is ±16% of reading.
Page 19 Rev. 5 | 2018.03 ART - Operation Manual NUMBER FEATURE FUNCTION Power LED Green LED, indicates unit power is ON. Œ Alpha-numeric display (to show concentration in 4-digit LED Display • real-time) Used to access the parameter list. Used to back up...
Page 20: Interior System Layout
Rev. 5 | 2018.03 ART - Operation Manual 5.2 Interior System Layout 5.2.1 Front of the Enclosure • Œ • Ž NUMBER FEATURE FUNCTION IR Bench Location of the Infrared sensor. Œ Relay Pluggable terminal for relay connection. • © 2018 All rights reserved. Data subject to change without notice.
Page 21: Back Of The Enclosure
Rev. 5 | 2018.03 ART - Operation Manual Modbus end of line Critical for good communication. Ž jumper Audible alarm Default setting is enabled. • 5.2.2 Back of the Enclosure Œ • • • Œ Ž Ž © 2018 All rights reserved. Data subject to change without notice.
Page 22: Mounting / Installing
• The ART contains sensitive electronic components that can easily be damaged. DO NOT touch or disturb any of these components. • DO NOT mount the ART directly to vibrating machinery as the vibrations may degrade the gas © 2018 All rights reserved. Data subject to change without notice.
Page 23: Mounting Locations
6.2 Mounting Locations 6.2.1 General Placement Guidelines The ART should be installed plumb and level and securely fastened to a rigid mounting surface. Gas detectors must be located within the appropriate wire lengths from the central control unit (if used).
Page 24: Refrigerated Spaces
Rev. 5 | 2018.03 ART - Operation Manual compressors, pressurized storage vessels, refrigerant cylinders or storage rooms or pipelines. The most common leak sources are valves, gauges, anges, joints (brazed or mechanical), lling or draining connections, etc. In machinery rooms where there is little or no air ow, placement options are: •...
Page 25: Chillers
Rev. 5 | 2018.03 ART - Operation Manual 6.2.4 Chillers In the case of small water- or air-cooled enclosed chiller units mount the gas detector so as to monitor air ow to the extract fans. With larger models also place a gas detector inside the enclosure under or adjacent to the compressors.
Page 26 Step 3: Wall Mount (if doing a junction box mount, go to Step 4) Attach the ART base to the mounting surface using two #6 screws (provided) through two of the 6 at surface mounting holes, being careful not to over-tighten the screws.
Page 28: Wiring And Configuration
ART - Operation Manual 7 WIRING AND CONFIGURATION 7.1 Overview Prior to wiring and con guring the ART, assure the following conditions have been met: • ART back plate is mounted in an appropriate location • The cover panel is removed.
Page 29: Wiring Supply Power (24 Vac Or 24 Vdc)
All wiring should be run within properly grounded (earth or safety) conduit. Low voltage wiring must not be within the same conduit as line voltage wiring. Either 24 VAC or 24 VDC may be used to power the ART. Connect wiring to the appropriate terminal locations. Use 2 wires between 14 and 22 AWG.
Page 30: Maintaining Neutral Polarity
Rev. 5 | 2018.03 ART - Operation Manual The ART must be powered by either: • A suitable UL 60950/CSA certi ed power supply that is isolated from line voltage by double insulation, or • An appropriately rated UL listed/CSA Class 2 transformer.
Page 31: Wiring Alarm Output (Analog Signal)
ART - Operation Manual 7.3 Wiring Alarm Output (Analog Signal) The ART provides an analog output signal that is proportional to the level of gas detected. NOTE: No jumpers or hardware switch settings are required to con gure the analog output. This is done electronically from the front panel display.
Page 32: Wiring Digital Alarm Output Relay
7.4 Wiring Digital Alarm Output Relay An alarm setpoint may be programmed from the front panel of the ART. When the sensed gas level exceeds the alarm setpoint, the ART enters the alarm state. An on-board relay is tied to the alarm state, so you may activate (or deactivate) external equipment based on the ART’s current alarm...
Page 33: Connecting To A Controller
ART - Operation Manual 7.5 Connection to a Controller The ART can connect to any Controller through the standard analog output (voltage and current: see 4.1 Technical Speci cations), the standard alarm relay, or the digital Modbus RTU communications interface.
Page 34 Management System) are con gured similarly. If the ART is at the end of the RS-485 network, then be sure to set the RS-485 terminator on the printed circuit board (PCB) to IN. This applies a terminating resistor to the end of the wires per the requirements of the RS-485 protocol.
Page 35: Conclusion
Rev. 5 | 2018.03 ART - Operation Manual 7.7 Conclusion Once the base is mounted and all wiring is complete, align the gas detector housing and press it onto the base. The gas detector will snap into position, completing all electrical connections.
Page 36: Operation And Stabilization
8.1 Power Up and Warm-up On powering up, the ART will sense for the presence of gas after an initial warm-up period of 2 to 5 minutes. The green LED will ash at a 1 second interval during the warm-up.
Page 37: Behavior During Alarm Conditions
Once the alarm has been triggered it will remain latched until the concentration drops below 80% of the alarm setpoint. 8.5 Gas Detector Faults 8.5.1 Overview There are two levels of faults monitoring built into the ART gas detector: • Non-critical • Critical 8.5.2 Non-Critical Faults Non-critical faults typically recover by allowing the gas detector surroundings to stabilize, for example, after a defrost cycle.
Page 38: Critical Faults
Rev. 5 | 2018.03 ART - Operation Manual critical faults, but may report inaccurate readings. The following occurs when a non-critical fault condition exists: ITEM BEHAVIOUR DURING ALARM STATE Green LED ON (solid) Shows the appropriate fault code Display Operates normally...
Page 39: Configuring / Setting The Parameters
PARAMETERS 9.1 User Interface Overview The ART Gas Detector is con gured through the built-in menu system. Once mounting is complete, attach the gas detector to the base and apply power. The user interface consists of four pushbuttons, a four digit LED numeric display, and a power LED.
Page 40: Setting Parameters
Rev. 5 | 2018.03 ART - Operation Manual When pressed together and held for 5 seconds, this key combination manually zeroes the gas detector. Saves the currently displayed parameter to memory. 9.2 Setting Parameters 9.2.1 Overview Press and hold the information button (i) for 5 seconds (the release) to activate the parameter list.
Page 41 Rev. 5 | 2018.03 ART - Operation Manual Alarm Set Point Sets desired ppm value (range 75 to 3,500 ppm) above which alarm occurs. Use UP or DOWN buttons. For faster “coarse” adjustment, hold either button to sweep through the adjustment range quickly. Default...
Page 42 Rev. 5 | 2018.03 ART - Operation Manual Relay Contact Behavior (Failsafe Mode) Sets the default relay power state so that power loss can be detected. The behavior of the relay changes from energizing when an alarm condition occurs (default) to energizing at power up (Failsafe). In both cases the relay changes state when an alarm occurs, failsafe is simply inverted.
Page 43 Select from 3 groups of gases or the actual refrigerant name is shown. Select the appropriate refrigerant. NOTE: The ART gas detector is factory calibrated to a single refrigerant using specialized manufacturing equipment. If another refrigerant is selected which di ers from the factory calibrated setting, the built in calibration no longer applies.
Page 44 Rev. 5 | 2018.03 ART - Operation Manual Buzzer Mute Time Sets a time (0-59 minutes) during which the active buzzer remains muted: - after the “I” button is pressed, or - after Modbus register 4000 is set to 0 Baud Band Sets the baud rate for Modbus (RS-485) communications.
Page 45 Rev. 5 | 2018.03 ART - Operation Manual Analog Output Scaling Allows the user to select the full-scale ppm value that represents maximum analog output (e.g., 20 mA) for scaling the analog output. Adjustment range is from 100 to 3,500 ppm. Default = 3,500 ppm. (The setting cannot be adjusted above 3,500.)
Page 47 Rev. 5 | 2018.03 ART - Operation Manual PARAMETER DESCRIPTION Gas Test Mode Places the gas detector in gas test mode. Disabled (default) Enabled When enabled, the display continuously cycles through the following: - CAL is displayed brie y. - Next, the gas group number or gas type (based on product code) is displayed.
Page 48 Rev. 5 | 2018.03 ART - Operation Manual Diagnostics Menu Parameter 18 provides access to the self-diagnostic information. The LED display shows “DIAG” until the Enter button is pressed. Use the UP and DOWN buttons to scroll through the list of diagnostic attributes.
Page 49: Completing Setup
(i) for 5 seconds to exit the Parameter list. The gas detector is now actively monitoring its surroundings. NOTE: If no buttons are pressed for 2 minutes, the ART exits setup mode automatically. © 2018 All rights reserved. Data subject to change without notice.
Page 50: Functional Tests And Gas Adjustments
The manufacturer is not liable for any loss, injury, or damage arising from improper testing, incorrect adjustment, or inappropriate use of the unit. Before testing the gas detectors on-site, the ART must have been powered up and allowed to stabilize.
Page 51: Bump Test Vs Adjusting Detector Response
Rev. 5 | 2018.03 ART - Operation Manual • In compliance with locally applicable guidelines and regulations Quali ed operators of the unit should be aware of the regulations and standards set down by the industry/country for the testing or calibration of this unit. This manual is only intended as a guide and, insofar as permitted by law, the manufacturer accepts no responsibility for the calibration, testing, or operation of this unit.
Page 52: Bump Testing
• For bump test or calibration the ART should be powered up and fully stabilized as per Section 8 Operation and Stabilization. 10.3 Bump Testing NOTE: Notify others that testing is underway.
Page 53 Rev. 5 | 2018.03 ART - Operation Manual • The output (0 - 10 V, for example) will show the gas level Ideally bump tests are conducted on-site in a clean air atmosphere. Step 1: Remove the splash guard accessory if one is used.
Page 54: Adjustment Using Calibration Gas
ART - Operation Manual 10.4 Adjustment Using Calibration Gas Every ART gas detector is calibrated in a chamber by true di usion method prior to leaving our facility. This method more closely emulates actual “real world” conditions. Field calibration using gas cylinder, regulator and hose directing span gas into the sensor may result in slightly higher readings.
Page 55 Rev. 5 | 2018.03 ART - Operation Manual After gas is applied and the 75 ppm squelch level is exceeded, the live concentration replaces the four dashes. NOTE: The analog outputs, relay activity, and RS-485 ppm reporting are suspended in Gas Test Mode to prevent false alarms.
Page 56: Modbus Communications
(“Modbus”) protocol. Generally (with the exception of some of the communications parameters), parameters you can access and/or con gure from the front panel of the ART can also be accessed and/or con gured via a Building Management System (for example) on the same Modbus network.
Page 57: Analog Input Registers
Rev. 5 | 2018.03 ART - Operation Manual 11.3 Analog Input Registers Analog input registers are read only and use function code 04. DESCRIPTION RANGE UNITS P.-## 1000 Concentration gas level 0-100 % FS Concentration gas level 0-65, 535 1001...
Page 58: Analog Output Registers
Rev. 5 | 2018.03 ART - Operation Manual 11.4 Analog Output Registers Analog output registers are readable (using function code 03) and writable (using function code 06). DESCRIPTION RANGE UNITS P.-## 2000 Alarm set point 75-3,500 P.-02 Alarm ON delay (Alarm ag register...
Page 59: Input Status Flags
Rev. 5 | 2018.03 ART - Operation Manual 0=9,600 2009 Baud rate none P.-13 1=19,200 2010 Stop bits 1 or 2 none P.-14 2011 Gas curve number 1 to 4 or gas type none P.-11 2012 Analog output full scale ppm (R/O) 100-3,500 P.-16...
Page 60: Output Status Flags
Rev. 5 | 2018.03 ART - Operation Manual 3007 Reserved Reserved 3008 11.6 Output Status Flags Output Status Flags are readable (using function code 01) and writable (using function code 05). DESCRIPTION RANGE P.-## 4000 Buzzer ag (0 or 1=ON) Test required (if operating for >1 year) (1=requires...
Page 61: Metal Protective Guard
Rev. 5 | 2018.03 ART - Operation Manual The Calibration Kit contains the items necessary for common eld and shop calibration. It comes in a durable, hard plastic carrying case. Gas cylinders are not included in the Kit. They must be ordered separately from the CETCI factory.
Page 62: Splash Cover
10.0” W x 9.5” H x 4.8” D (254 mm W x 241 mm H x 121 mm D) 12.3 Splash Cover (p/n: S) CETCI recommends using the splash cover to protect the ART in when used in wet environments or where spray or wash-down of equipment is a common occurrence such as meat processing rooms, food and beverage facilities or chiller rooms.
Page 64: Trouble Shooting
However, local regulations may specify the nature and frequency of this test. The ART features sophisticated internal status monitoring and will indicate whether a fault condition exists, both on the front display (F.-XX, with XX being the fault number) and over the Modbus communications network.
Page 65 Rev. 5 | 2018.03 ART - Operation Manual and reattaching. If the fault returns after cycling power, the gas detector should be removed from service and replaced. Additionally, the faults are stored as a hex code number and can be accessed in the Diagnostics menu P.-18.
Page 66: Diagnostic Attributes (P.-18)
If 0x0040 Fault no leak is present, it indicates a gas detector error. Input supply power to the ART is out of range (i.e., 24V ±20%). Input Voltage Fault 0x0080 IMPORTANT: If this fault is active, the gas detector is o ine and not monitoring.
Page 67 13.1 Fault Codes for the HEX format cross reference. The records may be erased by pressing the ENTER button. Displays the number of days that the ART has been in service. The value of this attribute rolls over after 9999.
Page 68: Resetting To Default Values
(°C change over 30 seconds). Reserved 13.3 Resetting the ART to Default Values The gas detector may be reset to its default state, if needed, to aid in trouble shooting. All settings, including alarm setpoint, gas adjustments, selected gas curve, calibration data, Modbus address, etc.
Page 69: Other Symptoms
Rev. 5 | 2018.03 ART - Operation Manual • The gas detector resets to the default settings • The gas detector beeper sounds for 3 seconds. Step 3: After 3 seconds the user is returned to the Parameter List at parameter P.-18.
Page 72 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 ART20180301-5-ART-Manual-Rev-5 © 2018 Critical Environment Technologies Canada Inc. All rights reserved. Data in this publication may change without notice.

CET ART Operation Manual

1 Policies

2 Introduction

3 Instrument Specifications

4 Sensor Specifications

5 Features

6 Mounting / Installing

7 Wiring and Configuration

8 Operation and Stabilization

9 Configuring / Setting the Parameters

10 Functional Tests and Gas Adjustments

11 Modbus Communications

12 Replacement Parts and Accessories

13 Trouble Shooting

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