Panametrics DigitalFlow XGF868i, Руководство по обслуживанию

Страница: 48 / 72

Appendix B. Calibration and Testing with PanaView
40 DigitalFlow™ XGF868i Service Manual
8. Double-click on % Test to test the linearity of the currently selected analog output.
9. Check the ammeter reading at 50% output . Then, enter a different output (0-100%) and double-click on percent .
Check the ammeter reading at this setting and click [Exit Page] when done.
Table 8 on page 40 lists the expected ammeter readings at various % Full Scale settings, for both 4-20 mA and
0-20 mA scales. Refer to this table to verify the accuracy of the ammeter readings taken above.
If the linearity test readings are not within 5  A of the values listed in Table 8 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.
10. Double-click on Exit Function to return to the Calibration menu. Then choose another output to calibrate or click
on
[Exit Page]
to leave the Calibration/Test menu.
This completes calibration of the Slot 0 analog outputs. Proceed to the appropriate section to calibrate additional
inputs/outputs.
Table 8: 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