VEGA VEGASWING 66 - two-wire With SIL qualification User Manual

Page 26

6 Setup

VEGASWING 66 • - two-wire

44952-EN-130805

Check if the switching status changes (signal lamp - switching

status). By doing so, you can check the function of the measuring

system.
If this is not the case, then there is a fault in the measuring sys-

tem.
Make sure the connected downstream devices are activated dur-

ing the function test.

You can find the coverage of the test in the Safety Manual.
Implementation - Function test

If you are using a signal conditioning instrument of type VEGATOR for

this purpose, you can also carry out the test with the integrated test

key. The test key is recessed in the front plate of the signal condi-

tioning insturment. Push the test key for > 2 seconds with a suitable

object (screwdriver, pen, etc.).
When the VEGASWING 66 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

I/mA

3,6

1,0

1,5

t/s

23,5

Fig. 37: Flow chart of the function test
1 Fault message

2 Full signal

3 Empty signal

4 Start-up phase

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.