VEGA VEGASWING 61 - two-wire - Manual (Page 21)

21
6 Setup
VEGASWING 61 • - two-wire
29227-EN-130409
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 VEGASWING 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:
•
Fault message
•
Empty signal
•
Full signal
1
2
3
16
I/mA
8
1,8
0,6 1,5 1,5
t/s
Fig. 27: 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
signal conditioning instrument). Keep in mind that connected instru-
ments are activated during the function test. By doing this, you can
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 (e.g. VEGATOR 636: +1 s)
After releasing the button or after a brief line break.
The specified times apply with a tolerance of ±20 %. Test procedure