Servomex SERVOTOUGH LaserExact 2950, Руководство оператора

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SERVOTOUGH LaserExact Monitor, Operator Manual 02950001A_1
ELECTRICAL CONNECTIONS
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6.9.2 Inverted configuration of relay-3, «Gas alarm»
This is defined by setting the parameter “Gas conc alarm level” < 0 (negative
value) for gas-1. Inverted relay-3 function then also applies to gas-2 and gas-3
alarm levels (if applicable) irrespective of their sign. Alarm is signified when the
measured gas concentration > abs(Gas conc alarm level) for one or more of the
measured gases. Inverted configuration:
Alarm ON = Relay-3 conducting (X)
Alarm OFF = Relay-3 isolating (O).
6.9.3 Maintenance configuration of relay-3
Maintenance indication is done by relay no. 3 by setting the parameter “Gas conc
alarm level” = -10
20
(= -1E20) for all gaslines, N , of the instrument (see Section
4.3.6). This ensures that «Gas Alarm» is disabled for all realistic gas
concentrations and does not interfere with the maintenance function.
“Normal” measuring mode: Relay-3 isolating (O)
“Zero”, “Span”, or “Maintenance” mode: Relay-3 conducting (X).
6.9.4 Inverting relay-3 output by hardware switch
The AUX-board switch SW1-3/C is by default set to position 3 (REL3_NC). This
gives the relay outputs as described in the sections above. When the AUX-board
switch SW1-3/C is set to position C (REL3_NO), the relay function is interchanged.
This also applies to operating mode “Power off” (see also Section 6.3).