GE DigitalFlow GC868, Service Manual

Page: 12 / 75

Calibration 1-5
April 2008
Calibrating the Analog
Outputs (cont.)
If the linearity test readings are not within 5
μ
A of the values listed in
Table 1-1 above, check the accuracy and wiring of the ammeter.
Then, repeat the low and high end calibrations. If the analog output
still does not pass the linearity test, contact the factory for assistance.
Procedure Options
You have completed calibration of the analog output. Do one of the
following:
•
To calibrate or test another output, press
[F4] (EXIT)
and return to
Step 3 in Accessing the Calibration Menu on page 1-3.
•
To calibrate/test additional slots, press
[F4] (EXIT)
twice and
proceed to the appropriate section.
•
To leave the Calibration Menu, press
[F4] (EXIT)
three times.
Table 1-1: Expected Ammeter Readings
% Full Scale 4-20 mA Scale* 0-20 mA Scale*
0 4.000 0.000
10 5.600 2.000
20 7.200 4.000
30 8.800 6.000
40 10.400 8.000
50 12.000 10.000
60 13.600 12.000
70 15.200 14.000
80 16.800 16.000
90 18.400 18.000
100 20.000 20.000
* All ammeter readings should be ±0.005 mA