Atest Gaz Alpa EcoDet XT, User Manual

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After the control unit reports the status of OPERATION (PRACA) the test of a detector can be
launched. For that purpose enforce the ALARM status by depressing the TEST button of the
detector. The control unit should also report the ALARM status.
Switch the power voltage off.
Repeat the foregoing installation procedure for all other detectors.
Upon having all detectors connected, switch the power voltage on. All employed channels of the
control unit should report the status of OPERATION (PRACA). Measure power voltage across
terminal of the most distant detector with the longest power supply line and make sure that the
voltage is not less than 10 V.
See more details in Appendix [3].
9.2.2.2 Bus layout with an open alarm loop
Route the bus cable across the facilities.
Install a control unit and supply power voltage to it. Upon power up the control unit should report
the status FAILURE (AWARIA) since no detectors are connected to it. Switch power voltage for the
control unit off.
Fix all detectors together with T-connectors on the facility area to support structures. Make
connections between T-connectors and T-connectors.
Connect the output port of the first T-connector (the closest one to the control unit) to the system
bus. Set the configuration switch of the gas detector to the ‘OST’ position (at the moment the
detector is the last/most distant one within the system).
Upon power up the control unit should report the status of OPERATION (PRACA) and indicator
LEDs on the front panel of the detector should flash one after another during the time period of
one minute (warm up and stabilization of the detector). Upon expiration of that time period the
‘OK’ indicator on the detector front panel should go on.
If the control unit still reports the status FAILURE (AWARIA), the connection is incorrect and
possible connection errors must be identified and remedied.
If the control unit reports the status of OPERATION (PRACA) set the configuration switch of the
detector to the ‘POS’ position (the detector shall be used as a line-up one). The X1 indicator on the
front panel of the detector should go on and the control unit should report the status of FAILURE
(AWARIA) – a detector at the far end of the communication bus is missing.
Switch the power voltage off.
Repeat the foregoing installation procedure for all other T-connectors and detectors.
Set configuration switches for all line-up detectors to the ‘POS’ position (No. 1). The configuration
switch of the last (the most distant) switch must be set to the ‘OST’ position (No. 2) – see Figure
8). The control unit should report the status of OPERATION (PRACA) for the entire bus structure.
Launch a test for the already assembled bus structure. For that purpose enforce the ALARM status
on the last (the most distant) gas detector by depressing its TEST button. After expiration of the
time gap that lasts from 5 to 30 seconds depending on the number of detectors, the control unit
should also report the ALARM status.
Hold the TEST button depressed on the last detector and measure the power voltage across its
power supply terminals. When the power voltage is lower than 10 V increase the voltage supplied
to the input of the bus or rearrange the system to the bus layout with a closed communication
loop.
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User Manual: POD-043-ENG R03