VEGA VEGAFLEX series 60 Recurring function test - Manual (Page 8)

If you do not have this possibility, connect an mA-meter according
to the following illustration.
You require the mA-meter for the verification of the current output
in the next test point. The accuracy of the mA-meter should be
better than 0.2 %. Select the smallest measuring range covering
4 … 20 mA.
1
2
3
mA
Fig. 2: Connection of the mA-meter
1 Level sensor
2 Processing system
3 mA-meter
6 Switch off the power supply.
7 Switch the voltage supply on again after approx. 10 s.
If the software signals a communication error during or after
switching off the power supply, you have to acknowledge it.
After connecting the sensor to power supply respectively after the
voltage recurrence, the instrument carries out a self-check for approx.
30 seconds:
l
Internal check of the electronics
l
The output signal jumps to the set error current
Then the current corresponding to the level is outputted to the cable.
1 The level is subject to plant or process-relevant fluctuations.
Control the indicated current values over an adequate period.
2 Note the upper and lower limit values of the measured value.
3 Compare the actually noted current values with the previously
noted values.
The two values must correspond within the safety accuracy of 2 %
(±0.32 mA).
If the two differential values are within the safety accuracy, then the
test of the restart was successful.
Continue with the next test point.
After switching on again
8 Recurring function test • for VEGAFLEX series 60
3 Sequence of the recurring function test
36552
-EN
-100225