Atest Gaz Alpa EcoDet XT, Руководство пользователя

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See more details in Appendix [3].
9.2.2.3 Bus layout with a closed alarm loop
That layout differs from the previous one only in the following aspects:
configuration switches for all gas detectors included into the communication loop are set to the
‘POS’ (No. 1) position (the control unit is deemed to be the last detector within the loop) – see
Figure 8,
the output port of the last T-connector is linked to the output port of the control unit.
See more details in Appendix [3].
9.3 Commissioning and start-up
9.3.1 Acceptance inspection
After the entire system for power supply and data transmission is assembled and installed the
commissioning test of the system can be commenced. The test consists is subsequent incorporation of
detectors (or their dummies, see below), one after another, into the system and checking of the control unit
behaviour.
9.3.2 Commissioning tests
To make sure that the entire system is in sound operating condition the following checks have to be done:
verification whether the control unit reports the status of OPERATION (PRACA) when none of
detectors is tripped with gas,
tripping of the first detector with a hazardous gas and verification of the control unit behaviour (it
should report a WARNING (OSTRZEŻENIE) or ALARM depending on concentration of a test gas),
tripping of the last (the most distant) detector with a hazardous gas and verification of the control
unit behaviour as well as behaviour of all intermediate line-up detectors – they should indicate
either a warning or ALARM – depending on concentration of a test gas,
random triggering of various intermediate line-up detectors,
random disconnection of single detectors and verification of the control unit response – it should
report the status of FAILURE (AWARIA) for the entire system.
See also more details in Section 9.4.
9.3.3 Start up
After installation of the entire system, verification of all electric connections and passing results of
commissioning tests the system start-up and final inspection can be commenced pursuant to the following
procedure:
double check correctness of electric connections and positions of configuration switches,
switch the power voltage for the system on. All detectors should carry out the warm-up operation,
which is indicated by flashing of LED indicators on detector front panels. During the warm-up
operation the channels (ports) of a control unit that are employed by the system should report the
status of OPERATION (PRACA). After about 1 minute all detectors and control units should be
ready for operation, which is reported by indication of the OPERATION (PRACA) status on all
detectors and on the control unit (provided that air is free of a contaminant that may trigger
a warning/alarm on any detector),
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User Manual: POD-043-ENG R03