VEGA VEGAVIB 61 - NAMUR - Manual (Page 23)

You can carry out the function test with the outputted current values
also directly via a safety PLC or a process control system.
A function test can be carried out for measurement setups in
conjunction with the NAMUR electronics module VB60N. For this
purpose, the switching delay must be set to 0.5 s. VEGAVIB 61 has an
integrated simulation key. The simulation key is lowered on the
electronics module. Push the simulation key for > 2 seconds.
If VEGAVIB 61 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
t/s
1
2
1,5
Fig. 23: 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.
Note:
Keep in mind that the starting time t
A
of the voltage supply can extend
the time up to the first switching.
After releasing the button or after a brief line break.
The specified times apply with a tolerance of ±20 %.
Simulation key on the
electronics module
Test procedure
VEGAVIB 61 • - NAMUR 23
6 Set up
31215
-
EN
-120418