BERTHOLD TECHNOLOGIES LB 6775, Operating Manual

Page: 72 / 118

6 Operation LB 6775
72
63039BA2, Rev. 01, 07/2018
Calibrate output
NOTICE
For calibration of the output, a voltage measurement device (not included in the
scope of delivery) is required, which is connected to the output.
1
2 Analog Puls out 0 – 10 V / 0/4 – 20 mA +
Analog Puls out 0 – 10 V / 0/4 – 20 mA –
Fig. 22 Calibrate output
Determine lower calibration point:
1. Click on the button <Test Mode> .
2. Set “Test Value” somewhere into the lower part of scale (e.g. 3,8 mA or 1 V)

the “Feedback Value” shows now the internally measured value
3. Measure the output value (mA / V) with a voltmeter (item 1 / item 2).
4. Write measured value to “Lower Cal. Point”.
5. Click on the button <Trim Offset> .
6. New check the “Feedback Value”. It should now display the voltage you en-
tered as test value. (a few oscillations around the “Test Value” are normal)

The calibration of the lower calibration point has been performed.
Determine upper calibration point:
1. Click on the button <Test Mode> .
2. Set “Test Value” somewhere into the upper part of scale (e.g. 3,8 mA or 9 V)

the “Feedback Value” shows now the internally measured value
3. Measure the output value (mA / V) with a voltmeter (item 1 / item 2).