Related Manuals for Critical Environment Technologies LPT
Summary of Contents for Critical Environment Technologies LPT
- Page 1 Operation Manual Rev. C | 2013.06 Economical Transmitter (Electrochemical Sensor) www.critical-environment.com...
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Page 2: Table Of Contents
LPT - Operation Manual Rev. C | 2013.06 TABLE OF CONTENTS 1 POLICIES ......................4 1.1 Important Note ....................4 1.2 Warranty Policy ....................5 1.3 Service Policy ....................6 1.4 Copyrights ......................7 1.6 Revisions ......................7 2 INTRODUCTION ..................... 8 2.1 General Description ..................8 2.2 Key Features .....................9... - Page 3 Rev. C | 2013.06 LPT - Operation Manual 6.3 Wiring Connections ..................21 Wiring Examples ...................... 22 Wire Gauge vs Run Length ..................23 Open Loop........................ 24 7 OPERATION ....................24 7.1 System Operation ...................24 7.2 Fault Detection....................24 7.3 Test Functions ....................25 7.4 Jumpers ......................25...
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Page 4: Policies
LPT - Operation Manual Rev. C | 2013.06 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 qualified electrician or trained technician and according to instructions indicated in this manual. -
Page 5: Warranty Policy
• Disconnect power before servicing • Supply: 24 V Critical Environment Technologies Canada Inc. (CETCI), also referred to as the manufacturer, warrants this instrument to be free from defects in materials and workmanship for a period of two (2) years from the date of purchase. -
Page 6: Service Policy
LPT - Operation Manual Rev. C | 2013.06 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. -
Page 7: Copyrights
Rev. C | 2013.06 LPT - Operation Manual 1.4 Copyrights This manual is subject to copyright protection; all rights are reserved. Under international and domestic copyright laws, this manual may not be copied or translated, in whole or in part, in any manner or format, without the written permission of CETCI. -
Page 8: Introduction
2.1 General Description Thank you for purchasing our LPT Low Power Transmitter for electrochemical sensor. The LPT transmitters are rugged, user-friendly analog gas detection transmitter for use in non- hazardous (non-explosion rated) environments such as, commercial HVAC and light industrial applications. -
Page 9: Key Features
Rev. C | 2013.06 LPT - Operation Manual If after reading through the manual, you have any questions, please do not hesitate to contact our service department for technical support. 2.2 Key Features • 2-wire loop, 3-wire VDC or 4-wire VAC power •... -
Page 10: Instrument Specifications
LPT - Operation Manual Rev. C | 2013.06 3 INSTRUMENT SPECIFICATIONS 3.1 Technical Specifications GAS TYPE Carbon Monoxide (CO) Nitrogen Dioxide (NO MECHANICAL Enclosure ABS / Polycarbonate Weight 400 g (14 oz) Size 5.0” x 4.0” x 1.9” (127 mm x 102 mm x 48 mm) - Page 11 Rev. C | 2013.06 LPT - Operation Manual VDC two or three conductor shielded 18 awg stranded VAC four conductor shielded 18 awg stranded Wiring (refer to Wire Gauge vs. Run Length in section 6.3 Wiring Connections) Fuse Automatic resetting thermal...
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Page 12: Standard Enclosure Dimensions
LPT - Operation Manual Rev. C | 2013.06 3.2 Standard Enclosure Dimensions 4.0” (101.6 mm) 1.91” (48.5 mm) © 2013 All rights reserved. Data subject to change without notice. -
Page 13: Sensor Specifications
Rev. C | 2013.06 LPT - Operation Manual 4 SENSOR SPECIFICATIONS 4.1 Sensor Specifications Carbon Monoxide (CO) Type Electrochemical Range 0 - 200 ppm Sensor Response Time (T 60 seconds Operating Temperature -10°C to 60°C (14°F to 140°F) Operating Humidity 5 –... - Page 14 LPT - Operation Manual Rev. C | 2013.06 Resolution 0.5 ppm Nitrogen Dioxide (NO Type Electrochemical Range 0 - 10 ppm Response Time (T < 30 seconds Operating Temperature -20°C to 50°C (-4°F to 122°F) Operating Humidity 15 – 90% RH non-condensing Operating Pressure Atmospheric ±...
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Page 15: Calibration Extending Firmware (Cef) And Sensor Aging
NOTE: Response time will be slower with a splash guard installed. 4.2 Calibration Extending Firmware (CEF) and Sensor Aging LPT systems with integral electrochemical sensors have been programmed with our CEF (Calibration Extending Firmware). This firmware takes into consideration the aging of the electrochemical CO and NO sensors so that less frequent calibrations are acceptable in non-critical applications such as parking garages. -
Page 16: Features & Functions
LPT - Operation Manual Rev. C | 2013.06 5 FEATURES & FUNCTIONS 5.1 Exterior Enclosure NUMBER FEATURE FUNCTION Door Hinge Secures door LED Indicator Indicates Power & Fail Door Screw Secures door ... -
Page 17: Interior System Layout
Rev. C | 2013.06 LPT - Operation Manual 5.2 Interior System Layout NUMBER FEATURE FUNCTION Jumpers For calibrations & test functions Test Points: TP-1 & TP-2 For measuring voltage output Wiring Terminal Pluggable wiring terminal ... -
Page 18: Installation
The LPT should be installed on a flat vertical surface using the four 0.175” (4.4 mm) diameter mounting holes provided. Care should be taken to ensure that the face of the LPT is not obstructed in order to maximize the sensor’s exposure to the environment being monitored. -
Page 19: Sensor Mounting Heights
Rev. C | 2013.06 LPT - Operation Manual apart. DO NOT TWIST. The section of the hinges located on the base should “snap” apart from the part of the hinges located on the door. After installation, simply locate the lid hinges over the installed base hinges and pull toward you. -
Page 20: Enclosure Mounting Components
LPT - Operation Manual Rev. C | 2013.06 6.2 Enclosure Mounting Components Enclosure Base NUMBER FEATURE Door Hinge Conduit Entry Mounting Holes © 2013 All rights reserved. Data subject to change without notice. -
Page 21: Enclosure Bottom
Refer to Wiring Examples. If the installer is powering the LPT with 24 VAC, both VAC wires should be connected to the terminal “one” and terminal “two”, from the top down. If the installer is powering the LPT with 24 VDC three wire, the “positive”... -
Page 22: Wiring Examples
Grasp the two sides of the terminal strip and pull sideways. Wiring Examples Device must be used with rated equipment. External power to LPT must be supplied by a Class 2 or better transformer. For loop-powered applications, the controller must conform to CSA, UL & CE safety standards. -
Page 23: Wire Gauge Vs Run Length
Rev. C | 2013.06 LPT - Operation Manual Wire Gauge vs Run Length MAXIMUM LOAD MAXIMUM CABLE SUPPLY VOLTAGE (Wire + Termination WIRE GAUGE (awg) LENGTH (feet) Resistor) (ohms) 4,400 24 VDC 7,100 10,700 216 (assume a 200 Ω 16 VDC... -
Page 24: Open Loop
If the 4 - 20 mA signal loop has not been connected properly or has been damaged in some manner between the analog transmitter and the device to which it is sending its signal output, the LPT will not run or function at all. At this point, the wiring should be inspected for potential problems. -
Page 25: Test Functions
0 - 200 ppm. Therefore 4.0 VDC = 200 ppm. 7.4 Jumpers There are two jumpers on J2 located at the back of LPT PCA. These jumpers allow the user to perform a range of set up, test and calibration functions. - Page 26 LPT - Operation Manual Rev. C | 2013.06 The following table details the jumper settings and explains the function enabled when these jumper positions are selected. FUNCTION DESIRED J2 JUMPER-1 J2 JUMPER-2 Setting Span Gas Value GAS3 IDLE (CO = 200 ppm, NO...
- Page 27 Rev. C | 2013.06 LPT - Operation Manual The three upper jumper’s (GAS1-GAS3) allow setting the calibration gas value. The OVER jumper setting allows overriding the value if out of range during calibration but still at a “reasonable” value. Lower jumper set (CAL). This jumper allows setting the calibration and checking the voltage and current output.
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Page 28: Voltage & Gas Concentration Level Reference Table
LPT - Operation Manual Rev. C | 2013.06 Voltage & Gas Concentration Level Reference Table: GAS CONCENTRATION SENSOR / GAS JUMPER-1 SETTING VOLTAGE READING LEVEL GAS3 200 ppm 4.00 VDC GAS2 100 ppm 2.00 VDC GAS1 50 ppm 1.00 VDC... -
Page 29: Adapters
Rev. C | 2013.06 LPT - Operation Manual Adapters The proper calibration adapter should be utilized to allow the gas to properly diffuse around the sensor. They are available from CETCI under part number CET-7000-CAP. 8.2 Calibrating Sensors Calibration Frequency •... -
Page 30: Calibration Procedure
If the reference table is unavailable, the gas level for each jumper position can be determined by placing Jumper-1 into one of the GAS positions and Jumper-2 into the OVER position. This will cause the LPT to output the corresponding signal on both the current loop and the voltage test points. - Page 31 Rev. C | 2013.06 LPT - Operation Manual Step 3: Move the Jumper-2 on J2 to position “CAL”. Step 4: If this level (possible residual gas) is too high, the internal LED will flash with a short OFF time and long ON time. This indicates that an override is needed. To override, move the Jumper-1 to the OVER position.
- Page 32 LPT - Operation Manual Rev. C | 2013.06 Step 9: Once gas flow is detected, the internal LED pattern will change to flash four times and then pause with the LED on. During this time the current loop will follow the gas level based on the ideal span of the sensor.
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Page 33: Accessories
Rev. C | 2013.06 LPT - Operation Manual 9 ACCESSORIES 9.1 Splash Guard Splash guard attaches to the front of the enclosures. Factory installed only. 9.2 Calibration Kit Calibration kits and gases are available from the CETCI factory. Many gases are carried in inventory but not all. -
Page 34: Metal Protective Guard
LPT - Operation Manual Rev. C | 2013.06 9.3 Metal Protective Guard The metal protective guard is heavy duty metal protective guard to help protect against abrasive damage, theft and vandalism to the transmitters. This is an added preventative in addition to the product enclosure. - Page 35 LPT - Operation Manual 10 MAINTENANCE The LPT transmitter requires virtually no maintenance other than regular calibration of the sensor. The transmitter should be monitored for possible damaging conditions. 1. The sensor port should be kept free of dirt or soot build up.
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Page 36: Trouble Shooting
Outer LED will flash with a short OFF time and long ON time and the current loop will output 20mA. The LPT is in fault mode. If re-calibrating the sensor fails, replace the transmitter. Outer LED will flash four times then pause. - Page 37 Rev. C | 2013.06 LPT - Operation Manual NOTES © 2013 All rights reserved. Data subject to change without notice.
- Page 38 LPT - Operation Manual Rev. C | 2013.06 NOTES © 2013 All rights reserved. Data subject to change without notice.
- Page 39 Rev. C | 2013.06 LPT - Operation Manual NOTES © 2013 All rights reserved. Data subject to change without notice.
- Page 40 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 © 2013 Critical Environment Technologies Canada Inc. All rights reserved. Data in this publication may change without notice.
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