WIKA LSO.25 - Manual (Page 29)

WIKA operating instructions models LSO.06, LSO.25 29
13334603.01 09/2010 GB/D/F/E
GB
Conditions:
■ P1 and P2 middle position, ca. 3 - 4 s time delay if P2 is open
■ Transducer correct connected and in function
■ No failure present
The time delay is, with S2 open, = switched on, must sufficiently be pushed for a long time
the button so that the complete test can go off. No test can go off, the alarm was already
entitled taken there is with S1 open, S2 open and sensor tip immersed. The same applies
S1 closed, S2 open and sensor tip dry. Failure, LED red and a yellow one flashes, can go
off no test at.
The test function makes possible a checking the measuring chain switching amplifier
separately and e.g. post-connected signal amplifier, signaling devices, control devices or a
correction device at a connected and operating transducer and a reliable information gives
about the proper function of the circuit board.
7.5 Operating characteristics relay SIGNAL
see table "Fault effect to dry/immersed", page 25
7.6 Operating characteristics relay FAILURE
The relay failure is energized in the normal operation and releases under the following
conditions (fail safe behavior):
■ The supply voltage breakes down (>100 ms)
■ The internal supply voltage for the intrinsic safe circuit breakes down
■ Short circuit (BR-WS) or interruption to infrared-LED (BR)
■ Short circuit (GN-WS) or interruption to phototransistor (GN)
Behavior of the LED's see table "Fault effect to dry/immersed", page 25
7. Configuration