WT.050.130.000.UA.IM.1108
ACUTEC
™
35 SYSTEM
26
NOTE: It is strongly recommended that sensors be powered overnight
upon initial startup before adjustments are made and before con-
nections are made to alarm relays. Sensors which are powered for
the first time may remain in an alarm state beyond the five minute
inhibit period and may take several hours to fully stabilize.
3.3.1
Alarm Acknowledge and Reset
The front panel of the Receiver contains one push-button, marked Ac-
cept/Reset, which is used for a number of different functions. When the
Receiver is in normal operation, a gas leak that exceeds the warning
setpoint will cause the Warning indicator to flash and the internal horn
to sound intermittently. If the alarm setpoint is exceeded, the Alarm
indicator will flash and the horn will sound steadily. Pressing the button
the first time will silence the audible horn, and will change the Warning
and Alarm indicators from flash to steady-on. The Warning indicator will
automatically shut off when gas concentration falls below the setpoint,
but the Alarm indicator will remain on. Pressing the button after the gas
has cleared will reset the Alarm indicator.
Operation of the alarm relays depends on the configuration selected for
each one (see paragraph 3.2.1, Configuration Switches).
3.3.2
Sensor Trouble Alarm and Relays
Receivers contain a Trouble Relay which is associated with the Sensor
Trouble indicator. A Sensor Trouble Alarm will be activated if the trans-
mitter input is disconnected or shorted or if the Detector fails to pass
an auto-test. If these conditions occur, the Sensor Trouble indicator
will light, the horn will sound intermittently, and the Trouble Relay will
change state. Note that the Trouble Relay is a fail-safe relay. Under normal
conditions, the coil of this relay is energized, and it de-energizes when a
Sensor Trouble Alarm occurs or if power fails. After the trouble condition
clears, press the push-button or close the remote reset contacts to reset
the Sensor Trouble Alarm.
3.3.3 Auto-Test
Function
NOTE: The Auto-Test option is for indoor use only, and should only
be used with detectors set to the standard range or lower, as listed
in Section 1.1 – Technical Data. If used with higher ranges, the gen-
erator may not produce enough gas to test the sensor.
The optional Auto-Test feature verifies the proper operation of gas detec-
tion systems automatically. It is enabled when configuration switch D1
is in the “on” position. Auto-Test uses an electrochemical Gas Generator
attached to the gas sensor and controlled from the receiver. Every 24