WT.050.130.000.UA.IM.1108
ACUTEC
™
35 SYSTEM
29
has cleared. The remote reset input will not activate any of the testing
or inhibit functions of the receiver.
3.3.8 Analog
Output
Monitor Receivers provide an isolated 4-20 mA output signal for interface
with recorders, data loggers, or computer systems. The span of the 4-20
mA signal is the same as the range of the receiver selected during the
receiver configuration. The output will drive loads of 0 to 1000 ohms.
3.4 Sensor/Transmitter
Operation
Gas sensors are attached directly to transmitter boxes with a water-tight
seal. A short sensor cable plugs into the transmitter circuit board. The
optional Gas Generator is attached to the sensor and connects to a ter-
minal block on the circuit board.
The Receiver provides power to the Sensor/Transmitter through a two-
conductor cable, which is also used to transmit the signal back to the
Receiver. The Sensor/Transmitter may not be used with a separate power
source.
3.4.1
Sensor Installation (See Dwg. 50.130.150.001)
Sensor/Transmitters must be mounted with the sensor horizontal.
NOTE: Gas sensors are shipped with a protective red plastic cap over
the end. This cap should be left in place to avoid damage to the sen-
sor physically or from chemical vapors, until ready for service. This
cap must be removed when the sensor is placed in service.
Installation wiring requires connection of a two-conductor cable from
the receiver to TB1 as shown. This connection is not polarity sensitive;
either conductor can be connected to either terminal.
The Autotest Generator is connected to TB2. Polarity must be observed
as shown.
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.
It is recommended that when first installed, a sensor should be connected
to a Receiver and allowed to stabilize for approximately 12 hours. The
sensor should then be zeroed as described in Section 4 – Service.
