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Rev. B | 2020.11

LPT-M - Operation Manual

Magnetic Sensors

Use a magnetic wand to access menu options and initiate
calibration without opening the enclosure.

Audible Alarm

Standard internal buzzer, rated 90 dB @ 10 cm, enable/disable

INPUT/OUTPUT

Communication

Modbus® RTU over RS-485

Modbus® ID: 100 (default, confi gurable)
Baud rate: 19,200 (default, confi gurable)
Data bits: 8
Start bits: 1
Stop bits: 1
Parity: none

Analog signal

4-20 mA input signal from ESH-A Remote Sensor

Relay

One SPDT dry contact relay, 30 volts, 2 Amps maximum

ENVIRONMENTAL

Operating Temperature

-20°C to 40°C / -4°F to 104°F

NOTE:

Low temperature option available to -40°C / -40°F) (

Sensor

dependent, some extremely cold applications may require a small
internal silicone heater to maintain temperature stability for sensor.
Contact CETCI for details)

Operating Humidity

15 - 90% RH non-condensing

Содержание LPT-M

Страница 1: ...Operation Manual www critical environment com LPT MModbus Digital Transmitter Rev B 2020 11...

Страница 2: ...10 2 2 Key Features 11 3 INSTRUMENT SPECIFICATIONS 12 3 1Technical Specifications 12 3 2 Internal Sensor GasTypes 15 3 3 ESH A Remote Sensor GasTypes 16 3 4 Enclosure Dimensions 17 4 INSTRUMENT FEATU...

Страница 3: ...n 31 5 7 3 ESH A Remote SensorWiring Connection 32 5 7 4 Modbus Wire Gauge vs Run Length 32 6 SYSTEM OPERATION CONFIGURATION 34 6 1 Navigating the Menu Structure 34 6 2 Accessing the Menu with Passcod...

Страница 4: ...s 50 6 11 1 Setting the Low Alarm Setpoint 50 6 11 2 Setting the Mid Alarm Setpoint 51 6 11 3 Setting the High Alarm Setpoint 52 6 11 4 Setting Hysteresis 52 6 12 Enable Disable Channels 53 7 CALIBRAT...

Страница 5: ...A Remote Sensor Connected to an LPT M 61 7 4 1 Zero and Span Calibration of a Responsive ESH A Remote Sensor 61 7 4 2 Zero Calibration of a New or Replacement ESH A Remote Sensor 61 7 5 Calibrating a...

Страница 6: ...g to instructions indicated in this manual This instrument should be inspected and calibrated regularly by a qualified and trained technician For more information refer to Section 7Calibration and Sec...

Страница 7: ...ironmentTechnologies is not liable for auxiliary interfaced equipment or consequential damage All returned goods must be pre authorized by obtaining a Returned Merchandise Authorization RMA number All...

Страница 8: ...perceive it You will be contacted with a cost estimate for expected repairs prior to the performance of any service work Pack the equipment well in its original packing if possible as we cannot be hel...

Страница 9: ...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...

Страница 10: ...on System BAS with Modbus RTU RS 485 serial communication Sensor configuration options include one two or three channel operation with a comprehensive choice of sensors for many toxic gases electroche...

Страница 11: ...sensor and or one remote catalytic combustible or PIDTVOC sensor Modbus RTU RS 485 serial communication Graphic LCD display user selectable function Internal audible alarm 1 dry contact relay 30 volt...

Страница 12: ...in x 2 8 in ELECTRICAL Power Requirement 16 30VDC 3W Class 2 12 27VAC 50 60 Hz 3VA Class 2 24V recommended See Section 5 7WiringConnections Current Draw 30 mA buzzer relay energized 2 sensors Wiring...

Страница 13: ...Modbus ID 100 default configurable Baud rate 19 200 default configurable Data bits 8 Start bits 1 Stop bits 1 Parity none Analog signal 4 20 mA input signal from ESH A Remote Sensor Relay One SPDT dry...

Страница 14: ...COUVRE UNIQUEMENT LES RISQUES DE CHOC ELECTRIQUE ET D INCENDIE D ORIGINE ELECTRIQUE Conforms to CSA C22 2 No 205 12 UL508 Edition 17 2007 Conforms to EMC Directive 2004 108 EC EN 50270 2006 Type 1 EN...

Страница 15: ...PT M CLO2 0 1 0 ppm 2 years Ethylene C2 H4 LPT M C2H4 0 200 ppm 2 years Ethylene Oxide C2 H4 O LPT M EETO 0 20 ppm 2 years Fluorine F2 LPT M F2 0 1 0 ppm 1 2 years Formaldehyde CH2 O LPT M CH2O 0 5 0...

Страница 16: ...Vol 3 years Ozone O3 LPT M O3 0 1 0 ppm 2 years Phosphine PH3 LPT M PH3 0 1 0 ppm 2 years Silane SiH4 LPT M SIH4 0 20 ppm 2 years Sulphur Dioxide SO2 LPT M SO2 0 20 ppm 2 years 3 3 ESH A Remote Sensor...

Страница 17: ...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 NOTE Th...

Страница 18: ...hts reserved Data subject to change without notice LPT M Operation Manual Rev B 2020 11 4 INSTRUMENT FEATURES 4 1 Exterior Enclosure Side view of LPT M showing location of Magnetic Sensors ARROW UP EN...

Страница 19: ...y opening and closing Display with green border Graphic LCD display Green border indicates transmitter operation is Modbus Magnetic Sensors arrow up Enter arrow down Use a magnetic wand to access menu...

Страница 21: ...e SensorTerminal Terminal for connecting the ESH A Remote Sensor RelayTerminal Low voltage pluggable terminal for relay connection 30 volts 2 amps max RS 485 Communication Terminals Pluggable power an...

Страница 22: ...TE All sensors are calibrated in the factory and do not require calibration at the time of a routine installation NOTE Temperature affects calibration It is important to ensure the gas is at the appro...

Страница 23: ...pe of gas being monitored See Section5 5MountingtheTransmitter The LPT M should be protected from extreme weather conditions The LPT M requires no assembly and virtually no maintenance other than regu...

Страница 24: ...red Any damage occurring from door removal procedure will not be covered under warranty Grasp the door with one hand being careful not to make contact with any of the internal components circuit board...

Страница 25: ...length NOTE When mounting the enclosure allow enough room to allow the end user to open the door fully to access the internal adjustments 5 5 1 Wet Environment Considerations If the LPT M is to be in...

Страница 26: ...phones and other electrical equipment may interfere with the response of the gas detectors 5 5 3 Mounting Height Sensor Dependent The sensor mounting height depends on the density of the gas relative...

Страница 27: ...tice 27 Rev B 2020 11 LPT M Operation Manual Chlorine Cl2 Commercial swimming pools 15 cm above the floor 6 in above the floor Ozone O3 5 6 Enclosure Mounting Components 5 6 1 Enclosure Base NUMBER FE...

Страница 28: ...nections or from too much voltage applied is not covered under warranty All wiring should be run in EMT or better conduit properly earth grounded All communications network wiring must be in shielded...

Страница 29: ...e to connect to the circuit board The rigidity of solid core wire can pull a soldered terminal strip completely off a circuit board and this will not be covered under warranty An end of line jumper mu...

Страница 30: ...er The main wiring terminal strip on the LPT M circuit board can be unplugged for easier wiring installation Grasp the two sides of the terminal strip and pull sideways The wiring should be 4 conducto...

Страница 31: ...gized under normal non alarm conditions The relay is de energized when if power fails In most applications the relay function should use the common COM and normally closed NC terminals With this wirin...

Страница 32: ...m 200 ft The voltage at the remote sensor RedV to Black GND should be 24VDC If this voltage is not met after installation the wrong gauge wire may have been used or the wiring run is too long Wiring E...

Страница 33: ...ons if the recommended maximum cable length needs to be exceeded an LNK XT Network Extender can be used to boost the waning signal strength One LNK XT extends the network length by an additional 610 m...

Страница 34: ...ding to the gas readings alarm setpoints buzzer and relay configurations as outlined in this manual In the event of a gas build up in excess of the alarm setpoints the internal alarm will sound and th...

Страница 35: ...he ARROW UP key will normally take you to the Exit screen Most menus are circular and will bring you back to the Exit screen 6 2 Accessing the Menu with Passcodes The main menu structure is broken dow...

Страница 36: ...ault Test Audible Buzzer Program Relays Enable Disable Relays Relay ON OFF Delays YES NO Failsafe Relay Alarm Setpoints Low Med High Fault Test Relay Change Modbus ID Change Baud Rate 3032 Sensor Conf...

Страница 37: ...but a correct reading will not show up until the unit has finished the warm up period and the sensor s has stabilized After the warm up period 3 minutes the device may exhibit gas alarm conditions if...

Страница 38: ...w alarm MID gas channel is in mid alarm HIGH gas channel is in high alarm FAULT gas channel is in fault COMM controller has been unable to communicate with the LPT M for at least 300 seconds NOTE If t...

Страница 39: ...and select Contrast Adjust Press ENTER to select Use the ARROW keys to enter a number between 00 and 35 The factory default contrast level is 20 6 6 Fault Detection The LPT M has built in fault detect...

Страница 40: ...tc Each device will have its own unique Modbus ID Individual transmitters being added to an existing system may require changes to the default Modbus settings 6 7 1 Change Modbus ID If required you ca...

Страница 41: ...about the Modbus holding registers please contact CETCI for assistance or refer to the Modbus Holding Registers Manual at https www critical environment com media download manuals Holding Registers L...

Страница 42: ...ugh the menu and choose Audible Enable Press ENTER to choose between ON or OFF 6 8 2 Audible ON Delay You can set the buzzer to be delayed in sounding for a specified period of time after the LPT M ha...

Страница 43: ...ng the buzzer enter 0000 6 8 3 Audible Alarm Level Assignment You can choose one level of alarm at which the buzzer will sound Choose from LOW MID HIGH or FAULT NOTE The LOW MID and HIGH setpoints of...

Страница 44: ...y providing one set of usable dry contacts for the relay Because the LPT M system is designed to be fail safe any equipment to be controlled by the system relay should be wired to the NC Normally clos...

Страница 45: ...ELAY has been set the relay will stay tripped for the duration of the RELAY OFF DELAY NOTE Each channel will trip the relay according to that channel s alarm setpoints and relay alarm level assignment...

Страница 46: ...ing no ON or OFF Delays are set 6 9 3 Relay Mode of Operation Normal or FAILSAFE The LPT M is designed to be fail safe so the relay is normally energized in a non alarm state for failsafe operation If...

Страница 47: ...t Relay Alarms Press ENTER and use the ARROW keys to scroll through the choices Press Enter to save and Exit 6 10 Test Functions 6 10 1 Test Audible Buzzer NOTE Before testing the audible alarm soundi...

Страница 48: ...enu and select Program Relay Press ENTER and use the ARROW keys to scroll through the menu and select RelayTest Press ENTER and use the ARROW keys to increase or decrease the number of seconds You can...

Страница 49: ...operly after installation and is still initiating an appropriate response from the controller during routine maintenance checks The test only applies to the channel you have chosen In the Sensor Confi...

Страница 50: ...ctor and each channel has three gas alarm setpoints LOW MID and HIGH which can be ascending or descending The number entered as the setpoint is the exact number at which the alarm will be triggered un...

Страница 51: ...number Press ENTER to move to the next digit and again to save and Exit the screen NOTE An Ascending alarm is used when the normal gas level starts out below the alarm setting and when the reading goe...

Страница 52: ...he alarm You can set a hysteresis value that will be common for all alarm setpoints on that channel For example if the alarm is set to come on at 100 ppm and the hysteresis is set for 5 ppm the alarm...

Страница 53: ...ey to choose ON or OFF Use the ARROW key to move on to the next menu item and ENTER to Exit 7 CALIBRATION 7 1 Calibration Specifications 7 1 1 Gas Calibration span gases should have at least 5 accurac...

Страница 54: ...eavier than air NO2 etc should be flowed between 0 5 and 1 0 LPM Fixed flow regulators provide more accuracy 7 1 3 Adapters The proper calibration adapter should be utilized to allow the gas to proper...

Страница 55: ...the concentration of the flow 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 flow concentration doesn t lessen over the distance from the...

Страница 56: ...NOTE If calibrating an Oxygen sensor refer to Section 7 5CalibratinganOxygenSensor To calibrate the internal sensor s the user must go through the following steps Step 1 In the Sensor Configuration M...

Страница 57: ...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 The factory default calibration g...

Страница 58: ...shed and the Span calibration was accepted remove the cylinder of span gas Refer to Section 7 3 4Span RequiresOverride if the Span calibration was not successful Repeat the calibration steps above for...

Страница 59: ...ibration is only done when the LPT M is being installed for the first time The reason for a zero shift calibration is to compensate for the new environment in which the LPT M is being installed 7 3 3...

Страница 60: ...orrect for In either case all that can be done is to attempt a complete calibration from the beginning Step 1 and determine if this corrects the fault If a calibration does not resolve the fault then...

Страница 61: ...nnected to In the Sensor Configuration Menu passcode 3032 press either ARROW key to scroll through the menu and select the channel the ESH A is assigned to Follow the instructions in Section 8 2 Calib...

Страница 62: ...ess either ARROW key to scroll through the menu and select the channel the ESH A has been assigned to Follow the instructions in Section 8 2CalibratingtheInternalSensor s with the exception of applyin...

Страница 63: ...or opening on the front of the enclosure door see Section 7 3 1CalibrationAdapterPlugif the adapter will not fit Once gas is detected display will show a countdown from 180 seconds 3 minutes NOTE If a...

Страница 64: ...art when the flow of gas is detected When the process has finished and the Zero calibration was accepted press ENTER to Exit and remove the cylinder of Nitrogen gas Refer to Section 7 3 3Zero Requires...

Страница 65: ...else the gas readings will not be accurate 8 3 Magnetic Wand p n CET MW The magnetic wand is used for accessing menu options and program functions without opening the enclosure Use to engage the magn...

Страница 66: ...SG The splash cover is made of a material 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...

Страница 67: ...except the sensors The transmitter should be monitored for possible damaging conditions The sensor vent should be kept free of dirt or soot build up If in a damp location source of water should be shi...

Страница 68: ...Check the connections and refer to the Wiring Examples in Section 5 7WiringConnections Device cannot be seen by the Controller and or the BAS DDC on the Modbus network Check the Baud rate All devices...

Страница 69: ...nformation Press ENTER and then the UP ARROW key to see this diagnostics screen ADC The current Analog to Digital Count number Reading The final gas reading after all filters N The new sensitivity in...

Страница 72: ...45 7391VantageWay Delta BC V4G 1M3 Canada Toll Free 1 877 940 8741 Tel 1 604 940 8741 www critical environment com 2020 Critical EnvironmentTechnologies Canada Inc All rights reserved Data in this pub...

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