Critical Environment Technologies LPT-M, Руководство по эксплуатации

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34 © 2020 All rights reserved. Data subject to change without notice.
LPT-M - Operation Manual Rev. B | 2020.11
6 SYSTEM OPERATION & CONFIGURATION
NOTE: The LPT-M can operate as part of a Modbus® network or as a standalone gas detection
device.
When part of a Modbus® network, the LPT-M will continuously monitor gas concentrations on the
confi gured channels and communicate the information back, when requested, to the BAS / DDC
/ controller via Modbus® RTU RS-485. The BAS / DDC will read the LPT-M gas readings and it will
trigger the safety responses (alarms, relays) as it has been confi gured.
If the BAS / DDC is not requesting information from the LPT-M or it is being used as a standalone
device, the LPT-M will operate according to the gas readings, alarm setpoints, buzzer and relay
confi gurations 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 the relay will be triggered to activate a remote horn
and/or strobe device, ventilation fans and/or some other safety procedure. When the gas level
drops below the confi gured alarm point, the device will return normal operation.
6.1 Navigating the Menu Structure
There are three programming push-buttons inside the enclosure that can be used to navigate
through the LPT-M menu structure, or you can use the magnetic wand without needing to open the
enclosure (refer to
Section 4.1 Exterior Enclosure for location photo). The three magnetic sensors are
indicated by an ARROW UP, ENTER and ARROW DOWN along the side of the enclosure. The magnetic
sensors function the same as pressing the buttons inside the enclosure.