The GDS 202 gas leak detection system features a main control unit connected to remote sensors via a single 3 core cable. The control unit is of an advanced design using the latest technology and provides a high integrity system whilst enabling a significant cost saving over conventional gas alarm systems.
Standard sensors for use in commercial and light industrial applications such as laboratories, workshops, boiler plant rooms etc are available for monitoring toxic, oxygen, flammable or refrigerant gases. Each sensor incorporates a status LED and alarm sounder. Sensor types may be mixed and up to 10 in number for the standard control unit, or up to 20 when used with an optional auxiliary power pack. Alternatively sensors may be used separately without a control unit providing they are powered by a 12 or 24volt DC supply. |
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On power up, the green power indicator will flash
for 3 minutes indicating that the sensors are stabililsing,
during this timed period all alarm functions are held
in the off condition.
After the stabilisation period, any sensor detecting
gas will provide a local visual (red LED) and audible
alarm, at the same time transmitting a signal to the
control unit where a pre alarm is indicated by an
intermittent audible alarm, with the red zone alarm
LED flashing and the pre alarm relay changing state.
Should the gas surrounding the sensor clear within
45 seconds the system will return to the normal operating
condition. However, if the gas remains for longer
than 45 seconds, full alarm condition will occur and
be indicated by the red alarm LED and sounder going
constant as well as the full alarm relay activating.
The audible alarm may be silenced at any time but
full alarm indication will be latched until the gas
has cleared after which the system may be reset by
pressing the reset pad.
Control Unit - A two-part screw together polycarbonate
enclosure houses the power supply alarm indicators,
control functions, and alarm relays. The enclosure
may be wall or panel mounted having cable entry from
the rear, bottom, top or sides.
Standard Sensors - Two-part push together plastic
enclosure that may be surface mounted using two fixing
points or attached directly to a standard conduit
box, cable entry is from the rear.
Hazardous area and special gas sensor - see data sheet
C389
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