Related Manuals for Critical Environment Technologies LPT-A Series
Summary of Contents for Critical Environment Technologies LPT-A Series
- Page 1 Operation Manual Rev. H | 2018.04 LPT-A Analog Transmitter www.critical-environment.com...
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Page 2: Table Of Contents
LPT-A - Operation Manual Rev. H | 2018.04 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 ......................8 1.6 Revisions ......................8 2 INTRODUCTION ..................... 9 2.1 General Description ..................9 2.2 Key Features ....................10 3 INSTRUMENT SPECIFICATIONS ..............11... - Page 3 Rev. H | 2018.04 LPT-A - Operation Manual 6 INSTALLATION ....................24 6.1 General Safety Warnings ................24 6.2 Protection Against Electrical Risks ..............25 6.3 Protection Against Mechanical Risks ..............25 6.4 System Installation ..................26 6.4.1 Wet Environment Considerations ..............6.4.2 EMI and RF Interference Considerations ............6.5 Sensor Mounting Heights ................27 6.6 Enclosure Mounting Components ..............29 6.6.1 Enclosure Base ....................
- Page 4 LPT-A - Operation Manual Rev. H | 2018.04 7.5 Fault Detection....................40 7.6 Test Function ....................40 7.7 Relay Operation / Setting the “Alarm” Level ...........41 8 CALIBRATION ....................43 8.1 Calibration Speci cations ................43 8.1.1 Gas ........................8.1.2 Regulators & Flow ................... 8.1.3 Adapters......................
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Page 5: Policies
Rev. H | 2018.04 LPT-A - 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. H | 2018.04 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
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. -
Page 8: Disclaimer
CETCI or visiting www.critical-environment.com. Should you detect any error or omission in this manual, please contact CETCI at the following address: Critical Environment Technologies Canada Inc. Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada Toll Free: +1.877.940.8741... -
Page 9: Introduction
Rev. H | 2018.04 LPT-A - Operation Manual Telephone: +1.604.940.8741 Fax: +1.604.940.8745 Email: marketing@cetci.com Website: www.critical-environment.com In no event will CETCI, its o cers or employees be liable for any direct, special, incidental or consequential damages resulting from any defect in any manual, even if advised of the possibility of such damages. -
Page 10: Key Features
LPT-A - Operation Manual Rev. H | 2018.04 Health & Safety (OHS) hazardous levels for toxic gases. 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 •... -
Page 11: Instrument Specifications
Rev. H | 2018.04 LPT-A - Operation Manual 3 INSTRUMENT SPECIFICATIONS 3.1 Technical Speci cations MECHANICAL ABS / Polycarbonate, IP54 rating with splash guard installed. Enclosure Copper coated interior to reduce RF interference. Weight 400 g (14 oz) Size 127 mm x 127 mm x 53.34 mm (5.0 in x 5.0 in x 2.1 in ) ELECTRICAL Power Requirement 3-wire mode... - Page 12 LPT-A - Operation Manual Rev. H | 2018.04 USER INTERFACE Graphic LCD, grey border. Text prompting for calibration operation Display and fault indications. Installer con gurable to suppress all other displays. Using the magnetic wand to initiate calibration without opening Magnetic Sensors enclosure.
- Page 13 Rev. H | 2018.04 LPT-A - Operation Manual CERTIFICATIONS Model: LPT-A-XXX S/N: LPTAE1601H00374 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.
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Page 14: Standard Enclosure Dimensions
LPT-A - Operation Manual Rev. H | 2018.04 3.2 Standard Enclosure Dimensions 61 mm (2.4 in ) 127 mm (5.0 in ) Above dimensions are shown with optional splash guard. Without splash guard, thickness is 53.34 mm (2.1 in). The area required for enclosure door to be open 90 degrees is 178 mm (7 in) or 254 mm (10 in) for fully open. -
Page 15: Sensor Specifications
Rev. H | 2018.04 LPT-A - Operation Manual 4 SENSOR SPECIFICATIONS 4.1 List of Available Internal Sensors Internal Electrochemical Part Number Range Lifespan Sensors Ammonia (NH LPT-A-NH3 0 - 500 ppm 2 years Carbon Monoxide (CO) LPT-A-COA 0 - 200 ppm 3 years Carbon Monoxide (CO) LPT-A-COB... - Page 16 LPT-A - Operation Manual Rev. H | 2018.04 Internal Electrochemical Part Number Range Lifespan Sensors continued... Nitrogen Dioxide (NO LPT-A-NO2A 0 - 10 ppm 3 years Nitrogen Dioxide (NO LPT-A-NO2B 0 - 10 ppm 6 years Oxygen (O LPT-A-O2 0 - 25% Vol 3 years Ozone (O LPT-A-O3...
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Page 17: List Of Available Esh-A Remote Sensors
Rev. H | 2018.04 LPT-A - Operation Manual Internal Catalytic Part Number Range Lifespan (Combustible) Sensors Hydrogen (H LPT-A-CH2-100 0 - 100% LEL 5 years Methane (CH LPT-A-CCH4-100 0 - 100% LEL 5 years Propane (C LPT-A-CC3H8-100 0 - 100% LEL 5 years 4.2 List of Available ESH-A Remote Sensors ESH-A Remote Sensors - Catalytic (Combustible) - Page 18 LPT-A - Operation Manual Rev. H | 2018.04 After installing an LPT-A with an Oxygen sensor, leave it to warm up for 2 hours before looking at the readings. After a substantial warm up period, an Ethylene Oxide sensor should be zeroed on site if the ambient temperature is above 22°C (71.6°F).
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Page 19: Calibration Extending Firmware (Cef) And Sensor Aging
Rev. H | 2018.04 LPT-A - Operation Manual 4.4 Calibration Extending Firmware (CEF) and Sensor Aging Some LPT-A systems with certain electrochemical sensors have been programmed with our Calibration Extending Firmware (CEF). This rmware takes into consideration the aging of the sensors so that less frequent calibrations are acceptable in less-critical applications such as parking garages. - Page 20 LPT-A - Operation Manual Rev. H | 2018.04 NUMBER FEATURE FUNCTION Door Hinge Secures door Œ Indicates transmitter operation • Display with gray border Door Screw Secures door Ž Sensor Opening • Allows gas di usion into sensor • Padlock Opening For security padlock ‘...
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Page 21: Interior System Layout
Rev. H | 2018.04 LPT-A - Operation Manual 5.2 Interior System Layout Depending on the type of sensor the LPT-A is con gured with, one of three circuit boards will be installed inside. 5.2.1 Electrochemical Sensor Board ‹ ’ Œ “... -
Page 22: Solid State (Internal) Sensor Board
LPT-A - Operation Manual Rev. H | 2018.04 5.2.2 Solid State (Internal) Sensor Board ‹ ’ Œ “ • ” Ž • • • ‘ © 2018 All rights reserved. Data subject to change without notice. -
Page 23: Solid State (Remote) Sensor Board
Rev. H | 2018.04 LPT-A - Operation Manual 5.2.3 Solid State (Remote) Sensor Board ‹ ’ Œ “ • ” Ž • • • ‘ NUMBER FEATURE FUNCTION ‹ J5 Buzzer Enable Enables / disables the buzzer. Œ Rotary Encoder Sets calibration values, etc. -
Page 24: Installation
LPT-A - Operation Manual Rev. H | 2018.04 Lights if there is no connection for current output • Open Loop LED (always lit in voltage output mode). Ž J7 Jumper Bank For calibration & test functions. • Calibrate State LED Further prompting for calibration operation. -
Page 25: Protection Against Electrical Risks
Rev. H | 2018.04 LPT-A - Operation Manual the enclosure and physically damaging the circuit board or internal components. There are no serviceable elements other than the calibration instructions outlined in this manual. There are no replaceable components except the sensors. 6.2 Protection Against Electrical Risks Disconnect all power before servicing. -
Page 26: System Installation
LPT-A - Operation Manual Rev. H | 2018.04 After installation, simply locate the lid hinges over the installed base hinges and pull toward you. The hinges should easily “snap” back into place. The enclosure has one screw securing the door to the base for electrical safety and provides an opening to allow the user to apply a padlock or tie wrap if they desire the transmitter to be locked. -
Page 27: Emi And Rf Interference Considerations
Rev. H | 2018.04 LPT-A - Operation Manual attached splash guard (factory installed). If used in a wet or wash down application, the conduit hub entering the LPT-A enclosure must be liquid tight type. Any water or physical damage to the transmitter that occurs from the installer drilling their own installation holes will not be covered under warranty. - Page 28 LPT-A - Operation Manual Rev. H | 2018.04 installed in the “breathing zone” which is the area approximately 1.22 m - 1.8 m (4 ft - 6 ft) from the oor, where most human breathing takes place. This is a good default location for sensors, as many gases are often well dispersed in air.
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Page 29: Enclosure Mounting Components
Rev. H | 2018.04 LPT-A - Operation Manual 6.6 Enclosure Mounting Components 6.2.1 Enclosure Base Ž Ž Œ • Œ Ž Ž • NUMBER FEATURE Door Hinge Œ 1/2” Conduit Entry Knockout • Mounting Holes Ž © 2018 All rights reserved. Data subject to change without notice. -
Page 30: Enclosure Bottom
LPT-A - Operation Manual Rev. H | 2018.04 6.2.2 Enclosure Bottom Œ • NUMBER FEATURE Door Hinge Œ 1/2” Conduit Entry Knockout • 6.7 Wiring Connections The LPT-A analog transmitter is a low voltage powered device. Any application of operating voltages higher than indicated in the speci cation may result in damage. -
Page 31: Power Connection
Rev. H | 2018.04 LPT-A - Operation Manual 6.7.1 Power Connection If the installer is powering the LPT-A with four wire 24 VAC, the VAC wires should be connected to the terminal “one” (AC) and terminal “two” (AC / DC), from the top down. The signal return should be connected to terminal “three”... -
Page 32: Relay Connection
LPT-A - Operation Manual Rev. H | 2018.04 NOTE: WARRANTY VOID IF SOLID-CORE WIRE IS USED AT THE WIRING TERMINAL STRIP. When using solid core wiring for distribution (in the conduit), use stranded wire pigtails 18 AWG within the enclosure to connect to the circuit board. The rigidity of solid-core wire can pull a soldered terminal strip completely o a circuit board and this will not be covered under warranty. -
Page 33: Wiring Lpt-A To Remote Esh Sensor (Dongle Style)
Rev. H | 2018.04 LPT-A - Operation Manual 6.7.3 Wiring from LPT-A to Remote ESH (dongle style) Sensor for Hotel Room Air Conditioning Applications Four-conductor, 16-18 awg stranded shielded cable is required for the remote dongle style sensor wiring. This wiring should be run in a conduit, separate from the signal output, and should not exceed 50 feet. -
Page 34: Wiring Lpt-A To Esh-A Remote Sensor
LPT-A - Operation Manual Rev. H | 2018.04 6.7.4 Wiring from LPT-A to an ESH-A Remote Sensor Four-conductor, 16-18 awg stranded shielded cable is required for the ESH-A Remote Sensor wiring. This wiring should be run in a conduit, separate from the LPT-A’s wiring, and should not exceed 200 feet. -
Page 35: Wire Gauge Vs Run Length
Rev. H | 2018.04 LPT-A - Operation Manual 6.7.5 Wire Gauge vs Run Length The table below shows the maximum cable length between the LPT-A and the controller for normal installations (a separate cable from the controller for each LPT-A). MAXIMUM LOAD MAXIMUM CABLE SUPPLY VOLTAGE... -
Page 36: Open Loop
LPT-A - Operation Manual Rev. H | 2018.04 Upon application of power, the display will show the gas formula (e.g. NO2), the units of measurement (e.g. PPM), and a “WARM UP” message. During this warm-up period (typically ve minutes, but varies with sensor type) the output signal is xed at 4.0 mA (current) or 0 volt (voltage). -
Page 37: System Operation & Configuration
Rev. H | 2018.04 LPT-A - Operation Manual 7 SYSTEM OPERATION & CONFIGURATION NOTE: The LPT-A can operate as part of a network or as a standalone gas detection device. When part of a network, the LPT-A will continuously monitor gas concentrations on the con gured channels and will send an analog signal back to the BAS / DDC / controller. -
Page 38: Display Select
LPT-A - Operation Manual Rev. H | 2018.04 The warm up period is approximately 3 minutes (some gases, like Chlorine, may take a little longer). After the warm up period the device may exhibit gas alarm conditions if the sensor has not completely stabilized during the warm up period. -
Page 39: Enable / Disable The Buzzer
Rev. H | 2018.04 LPT-A - Operation Manual J10 in DISable position (pins 1 - 2 connected): The display will be backlit but will only show the name of the gas (it will not show the gas readings) and any abnormal conditions, e.g. fault, etc. The display will always show messages during service functions, e.g. -
Page 40: Fault Detection
LPT-A - Operation Manual Rev. H | 2018.04 7.5 Fault Detection The LPT-A 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. At this point, the transmitter will output 0 mA on the current loop (or 0 volts on the voltage output). -
Page 41: Relay Operation / Setting The "Alarm" Level
Rev. H | 2018.04 LPT-A - Operation Manual though the outputs are the span gas level while the display continues to show ambient levels. After 5 minutes (or when the jumper is removed from the OVER / DESC / TEST position), the unit will return to normal operation. - Page 42 LPT-A - Operation Manual Rev. H | 2018.04 • The set point will be displayed, along with a “SETPOINT” icon indicating that the set point is being changed • The set point can also be monitored with a volt meter connected between TP1 and TP2. The value will be a zero to four volt signal proportional to the set point level.
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Page 43: Calibration
Rev. H | 2018.04 LPT-A - Operation Manual SENSOR GAS TYPE TRIP POINT ALARM LEVEL TP1 TP2 VOLTAGE Carbon Monoxide (CO) 25 ppm 0.5 volts Nitrogen Dioxide (NO 0.7 ppm 0.28 volts Solid State Refrigerants 250 ppm 0.5 volts Combustible 10% LEL 0.8 volts 8 CALIBRATION... -
Page 44: Regulators & Flow
LPT-A - Operation Manual Rev. H | 2018.04 8.1.2 Regulators & Flow Calibration gases that are lighter than or the same weight as air (CO, O , etc.) should be owed at 0.5 LPM. Gases heavier than air (NO , etc.) should be owed between 0.5 and 1.0 LPM. Fixed ow regulators provide more accuracy. -
Page 45: Gas Testing Frequency (Bump Testing)
Rev. H | 2018.04 LPT-A - Operation Manual 8.1.6 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. 8.1.7 Sticky Gases Sticky gases, such as Ozone (O ), Chlorine (Cl ) and Hydrogen Chloride (HCl) adhere to surfaces such... -
Page 46: Setting The Calibration Gas Level
LPT-A - Operation Manual Rev. H | 2018.04 • The ambient gas level is higher than considered reasonable. CETCI strongly recommends using zero air (N must be used to zero Oxygen sensors). 8.2 Setting the Calibration Gas Level The calibration gas concentration can be changed in the same fashion as the set point: •... - Page 47 Rev. H | 2018.04 LPT-A - Operation Manual adjust). Monitoring the calibration with a volt meter at TP1 and TP2 is optional. The range of 0 - 4.0 VDC is equal to the full measurement range of the sensor, e.g. CO sensor has a standard measurement range of 0 - 200 ppm.
- Page 48 LPT-A - Operation Manual Rev. H | 2018.04 • Open regulator valve fully allowing zero air (Nitrogen) to ow over sensor for one minute. As the amount of oxygen decreases, it will trigger the descending alarm point and the alarm will go o .
- Page 49 Rev. H | 2018.04 LPT-A - Operation Manual • ZERO FAILED! RECALIBRATE - see Section 7.5 Fault Detection Step 4: Possible Override • If the zero level appears too high (the ambient air might have a slight background of the target gas present, or it might have been so long since the last calibration that the sensor has drifted), the display will show “ZERO OUT OF RANGE, OVERRIDE?”...
- Page 50 LPT-A - Operation Manual Rev. H | 2018.04 • To override, move the second IDLE jumper from its rest position to the OVER / DESC / TEST position. • If the jumper is not moved to the OVER position within 30 seconds, the calibration will be cancelled and the LPT-A will return to normal mode.
- Page 51 Rev. H | 2018.04 LPT-A - Operation Manual for improperly calibrated transmitters. Follow manual instructions carefully. Step 8: Wait for stable reading • Once gas ow is detected, the display will show ‘WAITING FOR STABLE READING’ . • The calibrate state LED pattern will ash four times and then pause with the LED on. During this time the TP1 voltage will follow the gas level based on the ideal span of the sensor.
- Page 52 LPT-A - Operation Manual Rev. H | 2018.04 positions. • If the calculated sensitivity of the sensor is out of range the display will show ‘SPAN FAILED! RECALIBRATE’ indicating the sensor cannot be calibrated. You can try to recalibrate, starting from Step 2, to con rm the procedure was followed correctly and this may correct the fault.
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Page 53: Calibrating An Esh-A Remote Sensor Connected To An Lpt-A
Rev. H | 2018.04 LPT-A - Operation Manual 8.4 Calibrating an ESH-A Remote Sensor Connected to an LPT-A There are two di erent processes for calibrating an ESH-A Remote Sensor. One process is for a new or replacement sensor and the other is for a properly functioning sensor. For either process, rst ensure that the sensor has been continually powered for at least 24 hours. -
Page 54: Calibrating An Oxygen Sensor
LPT-A - Operation Manual Rev. H | 2018.04 Step 3 Attach a volt meter to TP1 and TP2. Using the POT RN1 potentiometer (located on the left underside of the ESH-A board), adjust the voltage to read 0.40 VDC. Verify that the voltage output from digital multi-meter leads attached to test points TP1 and TP2 on the LPT-A is reading 0.0 VDC (a Zero and Span Calibration of the LPT-A will be required if this is not the case). - Page 55 Rev. H | 2018.04 LPT-A - Operation Manual To achieve calibration, the user must go through the following steps: Step 1: If you are using a di erent calibration gas concentration than from previous calibrations, you will need to set the Calibration Gas Level. The calibration gas concentration can be changed in the same fashion as the set point: •...
- Page 56 LPT-A - Operation Manual Rev. H | 2018.04 • Open regulator valve fully allowing calibration gas to ow over sensor for 3 minutes. If no gas is detected after one minute, the transmitter returns to normal operation and the procedure will need to be repeated from Step 2.
- Page 57 Rev. H | 2018.04 LPT-A - Operation Manual Step 4: Span Accepted • Once spanned, the display will show ‘FLOW NITROGEN’ . • Disconnect the calibration gas (if used) from the calibration adapter. Step 5: Attach hose from the bottle of Nitrogen (N ) 100% vol to the calibration adapter.
- Page 58 LPT-A - Operation Manual Rev. H | 2018.04 • To override, move the second IDLE jumper from its rest position to the OVER / DESC / TEST position. • If the jumper is not moved to the OVER position within 30 seconds, the calibration will be cancelled and the LPT-A will return to normal mode.
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Page 59: Accessories
Rev. H | 2018.04 LPT-A - Operation Manual 9 ACCESSORIES 9.1 Splash Guard p/n: S The splash guard attaches to the front of the enclosure and when installed, the enclosure meets IP54 standards. Factory installed only. NOTE: The splash guard will slow down the response time of the sensor. NOTE: The splash guard option is not available for LPT-A’s with “sticky gas”... -
Page 60: Metal Protective Guard
LPT-A - Operation Manual Rev. H | 2018.04 9.3 Metal Protective Guard p/n: SCS-8000-RSG The metal protective guard 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... -
Page 61: Maintenance
Rev. H | 2018.04 LPT-A - Operation Manual Calibration Kits and gases are available from the CETCI factory. Many gases, but not all are carried 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. -
Page 62: Trouble Shooting
LPT-A - Operation Manual Rev. H | 2018.04 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. 11 TROUBLE SHOOTING LPT-A won’t power up. (blank display) Is the power properly connected? Check the connections. - Page 63 Rev. H | 2018.04 LPT-A - Operation Manual List of Possible LPT-A Error Codes: (appears on the display with a triangle that has an ! in the center of it) Code Description The sensor signal is too far negative. May be caused by a sensor Negative that is temperature or humidity sensitive.
- Page 64 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 LPTA20180413-H © 2018 Critical Environment Technologies Canada Inc. All rights reserved. Data in this publication may change without notice.
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