VEGA VEGAWAVE 61 - two-wire - Manual (Page 24)

The correctness of the subsequent switching conditions must be
monitored via the two LEDs on the signal conditioning instrument as
well as the connected devices. The sensor must neither be
dismounted nor triggered by filling the vessel.
This applies for VEGAWAVE 61 with two-wire electronics module
WE
60Z.
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 with measurement setups in
conjunction with the two-wire electronics module WE60Z EX.
If you are using a signal conditioning instrument of type VEGATOR for
this purpose, you can carry out the test with the integrated test key.
The test key is recessed in the front plate of the signal conditioning
insturment. Push the test key for > 2 seconds with a suitable object
(screwdriver, pen, etc.).
When the VEGAWAVE 61 is connected to a processing system or an
SPLC, you have to interrupt the connection cable to the sensor for > 2
seconds. The switching delay must be set to 0.5 s.
After releasing the test key or interrupting the connection cable to the
sensor, the complete measuring system can be checked on correct
function. The following operating conditions are simulated during the
test:
l Fault message
l Empty signal
l Full signal
16
I/mA
8
2
t/s
1
2
3
0,6 1,5 1,5
Fig. 36: Flow chart of the function test
1 Full signal
2 Empty signal
3 Fault message
Check if all three 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 (see also the operating instructions manual of the
24 VEGAWAVE 61 • - two-wire
6 Set up
32250
-EN
-120418