Sensor Assembly - General Monitors 580A Instruction Manual

Set points for High and Low alarms are adjustable from 5 to 60% LEL.
NOTE: A service-loop is necessary between the Model 580A Controller's rear panel
terminals and field/power wiring. This service loop permits the controller to be
removed or slid forward for servicing. This service loop is a definite advantage
when replacing or changing a controller.
1.4

Sensor Assembly

Two sensor assemblies are normally supplied with the system. These assemblies are
comprised of the sensor, the sensor housing, and an optional splashguard.
Note: This sensor assembly is CSA approved for Class I, Division 1 and Division 2,
Groups B, C & D hazardous areas.
On some occasions, different sensor housing may be supplied. The appropriate sensor is
provided if GMI is made aware of the gas or vapor that is to be monitored. Most
combustible gases may be monitored, including most hydrocarbons and hydrogen.
CAUTION: Sensors have a different sensitivity to each gas. GMI should be consulted if a
sensor is expected to detect more than one gas. GMI can then recommend
the best calibration gas.
A variety of sensor covers may be purchased (Section 7.7.2). They provide extra
protection from wind, weather and dust.
In the event the system is to have less than two active channels, Part Number 10102-1
(sensor simulator) must be substituted for the unused channel. Otherwise, the FAULT
LED indicator for the unused channel will flash.
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Model 580A