KROHNE OPTISWITCH 3100C NAMUR EN - Manual (Page 22)

sequence of the switching conditions must be monitored via
the switching amplifier as well as the connected systems. The
sensor must neither be removed nor response must be
triggered by filling the vessel. This applies to OPTISWITCH
3100 C with NAMUR oscillator VBE60N.
You can carry out the function test with the outputted current
values also directly with a safety PLC or a process control
system.
For measurement setups in conjunection with the NAMUR
oscillator VBE60N, a function test can be carried out. The
integration time must be set to 0.5 s. OPTISWITCH 3100 C
has an integrated simulation key. The simulation key is
lowered on the oscillator. Push the simulation key for >2
seconds.
If OPTISWITCH 3100 C is connected to an SPLC, you have to
interrupt the connection cable to the sensor for >2 seconds.
After releasing the simulation key or briefly interrupting the
connection cable to the sensor, you can check the complete
measuring system on correct function. A switching procedure
is simulated during the test.
2,2
I/mA
1
3 4,5 t/s
1
2
Fig. 14: Flow chart of the function test
1 Full signal
2 Empty signal
Check if all the switching conditions occur in the correct
sequence and the stated time period. If this is not the case,
there is a fault in the measuring system. Keep in mind that
connected instruments are activated during the function test.
This allows you to check the correct function of the measuring
system.
Simulation key on the elec-
tronics module
22 OPTISWITCH 3100 C - with NAMUR output
Set up
31356
-EN
-060830