Critical Environment Technologies GEM-II, Руководство по эксплуатации

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34 © 2014 All rights reserved. Data subject to change without notice.
GEM-II - Operation Manual Rev. E | 2014.10
NOTES for Type D with One Internal & One Remote Sensor:
1. This photo shows the optional LED digital display.
2. In this installation, the remote sensor is for heavier than air gases such as propane or a solid
state refrigerant gas so the sensor should be installed 6” from the floor or near the most
likley are to leak.
6.8.4 Type E with Two Internal Sensors
7 oPeRaTIon
7.1 system operation
In the event of a burned-out, damaged or missing catalytic or solid state sensor element, the
controller will indicate fail condition on the front door by illumination of the red fail LED. At
this point, both system relays will have reversed state (de-energized) and anything connected
to them will be running continuously. Normal system operation will not occur until the fault
condition has been rectified. The same condition will occur if the 4 - 20 mA signals from the
remote LPT-A or LPT transmitter are broken or interrupted.
NOTES:
1. Fail condition overrides any system time delays that may have been set.
2. Reference photo in Section
5.1 Standard Exterior Enclosure for location of LEDs, and test-
buttons.
Two integral electro-
chemical sensors such as CO
(gas engine exhaust) & NO
2
(diesel engine exhaust)
GEM Type E is a controller with
two integral electrochemical
sensors.