GasSens
Gas Detection System
Section 2 - A14 Receiver Module
O & M Manual
A14-RK, 8/06
2 - 10
When the Auto-Test is activated, the generator will turn on for a maximum of 5 minutes. If no
sensor response is detected during this time, the generator will turn off and the receiver will wait
for 15 minutes before initiating another Auto-Test. If no sensor response is detected after the
second test, the trouble indicator will flash, trouble relay will change state, and the horn will sound.
The test sequence will be repeated twice more at one hour intervals. If the system passes,
alarms will automatically shut off. If it fails, the alarms will continue to be energized. If the trouble
alarm has been manually acknowledged and reset between tests, a failure will reactivate the
trouble alarm.
NOTE: No Auto-Test will be initiated if the measured gas concentration is above either of
the two setpoints. If this condition exists, the receiver will wait for another 24
hours before initiating another Auto-Test sequence.
Lamp and Horn Test
Verification that all digital display segments and alarm indicator bars are functional is done
using the
A/R
button to initiate a lamp test. If the detection system includes an internal horn, the
horn is also tested as part of the lamp test.
To activate the lamp test, press and hold the
A/R
button for 2 seconds and all front panel
indicators will light. The horn will also sound briefly. Immediately release the button and the
indicators will return to normal. During this test, alarm relays will not be activated.
Relay Inhibit
Alarm relays in the receiver can be inhibited for up to 4 hours to allow calibration or testing of
sensor/transmitters without activating external alarm or control devices. Inhibit is activated
through the use of the
A/R
button.
Press and hold the button for approximately 5 seconds. The lamp test will occur first, but
continue to hold the button down. Once the lamps have shut off, release the button. The
WARNING and ALARM lamps will begin an alternating flash pattern, and, if the receiver is
configured for Auto-Test, the flash will switch to the trouble lamp. If you do nothing, the flash will
switch between the WARNING/ALARM lamps and TROUBLE lamp twice and then revert to
normal operation.
If the
A/R
button is pressed and released while the WARNING and ALARM lamps are in
alternating flash, the receiver will go into the relay inhibit mode (if a horn is connected, a quick
beep will sound when the inhibit is selected). The WARNING and ALARM lamps will continue
their alternating flash for 4 hours or until the
A/R
button is pressed again. During this period, the
display will indicate gas concentration, but the relays will not. Transmitters may be calibrated
while the inhibit is on without activating external alarms.
