VEGA VEGAVIB 66 - NAMUR - Manual (Page 23)

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 VEGAVIB 66 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. VEGAVIB 66 has an
integrated simulation key. The simulation key is lowered on the
oscillator. Push the simulation key for >2 seconds.
If VEGAVIB 66 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. 15: Flow chart of the function test
1 Full signal
2 Empty signal
Check if 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.
By doing this, you can check the correct function of the
measuring system.
(after releasing the simulation key)
Simulation key on the elec-
tronics module
Test procedure
VEGAVIB 66 - with NAMUR output 23
Set up
31219
-EN
-060508