VEGA VEGASWING 66 - transistor (NPN-PNP) With SIL qualification - Manual (Page 24)

24
6 Setup
VEGASWING 66 • - transistor (NPN/PNP)
44951-EN-130805
Level Switching sta-
tus
Signal lamp -
green
Voltage supply
Signal lamp -
yellow
Switching sta-
tus
Signal lamp
- red
Fault message
Failure of the
supply voltage
Mode max./min.
any open
Fault any open
6.4 Proof test
To find out possible undetected, dangerous failures, a proof test must
be carried out in adequate time intervals to check the safety function.
It is the user's responsibility to choose the type of testing.
You will find further instructions in the Safety Manual.
The following options are available for carrying out the proof test:
1. Short interruption of the supply line to the sensor
Average coverage (detected errors)
2. Dismounting of the sensor and immersion in the original medium
High coverage (detected errors)
3. Filling of the vessel up to the switching point
High coverage (detected errors)
This test is valid if you cannot change the vessel filling or cannot
dismount the sensor.
Test without filling or dismounting the sensor
1. Separate the instrument briefly (>2 s) from voltage supply.
After switching on again, the instrument must take on the same
switching status.
If this is not the case, then there is a fault in the measuring sys-
tem.
Make sure the connected downstream devices are activated dur-
ing the function test.
2. Set the mode switch (min./max.)
Check if the switching status changes (signal lamp - switching
status). By doing so, you can check the function of the measuring
system.
If this is not the case, then there is a fault in the measuring sys-
tem.
Make sure the connected downstream devices are activated dur-
ing the function test.
You can find the coverage of the test in the Safety Manual.
1 Short interruption of the
supply line to the sensor