© 2014 All rights reserved. Data subject to change without notice.
9
Rev. E | 2014.10
GEM-II - Operation Manual
2 InTRoDUCTIon
2.1 General Description
Thank you for purchasing our GEM-II self-contained gas detector.
The GEM series gas detection systems are economical, self-contained, gas detectors for non-
hazardous (non-explosion rated) commercial applications. They are available in two basic
configurations: one sensor models and two sensor models. The sensors can be configured as one
integral (A-type), one remote (B-type), one integral and one remote (D-type), or two integral
(E-type).
A basic system provides one set of LED indicating lights representing “Power”, “Fail”, “Low
(Warning) Gas Alarm”, ‘High Gas Alarm”, an integral audible alarm with door mounted silence
push-button, audible time delay, field settable relay time delays and two alarm relays. In either
system, the LED lights provide visual indication of the status of each channel (Int = internal
sensor, Ext = external sensor or second channel).
Gas specific electrochemical sensors for toxic gases and Oxygen (O
2
) are available as are MOS
solid-state sensors for refrigerants and catalytic sensors for combustible gases. All GEM integral
sensors are packaged as plug-in “smart” sensor modules to reduce field maintenance time.
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
•
Single or dual channel
•
Network multiple units
•
Integral plug & play “smart” sensors or remote sensors
•
4 – 20 mA linear output signal
•
Three conduit entry ports
•
Thermal resetting fuse
•
LED light indicators
•
Two 5-amps SPDT relays
•
RoHS compliant circuit boards
•
CSA & UL certified
Содержание GEM-II
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