This unique, practical gas monitor
readout/alarm device offers a variety of configuration options for
industrial refrigeration customers with their own computer control
system, OEMs who want to incorporate gas sensing in their design and
existing Honeywell Analytics customers who want remote indication other
than at their main readout. It has an easily adjusted setpoint and relay
output in either configuration, plus 4/20mA output in the
"feed-through" design. With its own plug-in power supply, the GM-JR
sensor combination provides an economical answer for local concentration
level information and control capability.
The GM-JR standard configuration is a single, rugged, miniaturized board
mounted inside the door of the enclosure, and a separate terminal board
for the sensor and/or power cable connections. The 20-segment LED bar
graph has a calibrated scale that is specified when ordered. Alarm trip
adjustments are made easily at 5% increments. On power up or after
momentary power loss, a one-minute power-up delay period allows the
sensor to stabilize.
The unit continuously monitors the incoming 4/20 mA signal from the
sensor. If the signal drops below 1.4 mA, the fault LED will illuminate
and the alarm relay will trip. The alarm relay is always energized in
its normal state, providing additional safety.
The GM-JR can be housed in its own
4" x 6" heavy-duty steel enclosure and operate as an "end of line"
stand-alone readout/alarm unit or feed the sensor's 4/20 mA signal
directly through to a PLC. It also can be mounted in the door of any
sensor enclosure to incorporate both sensor and readout in the same 4" x
6" or 6" x 8" housing. Use #18/3 shielded cable (Belden #8770 or equal)
for runs up to 1500' with most sensors.
