DigitalFlow™ XGM868i Service Manual 3
Chapter 1. Calibration
1.3.2 Calibrating the Low End of the Output Range
1. From the Keypad Program, press the right arrow key to scroll to the CALIB menu. Press [Enter].
2. In the Cal menu, scroll to the Slot 0 or Slot 1 option, and press [Enter].
Note: The Slot 1 option only appears in the menu if an option card has been installed in this slot.
3. Scroll to either Output A or Output B to open the Analog Output menu. (Output A will be used as an example in this
manual.) Press [Enter].
IMPORTANT: The procedure for calibrating Output B is identical to that for calibrating Output A. However, when
calibrating Output B, be sure to reconnect the ammeter on terminal block J1. See Figure 1 on page 2 for
the correct pin numbers.
4. Scroll to 4 mA to calibrate the low end of the output range. Press [Enter].
5. Scroll to UP or DOWN to adjust the ammeter reading UP or DOWN, until a 4 mA reading is achieved,
or
Scroll to Numer, and directly enter the mA reading. In either case, press [Enter] to confirm the entry.
6. Once you have achieved a 4 mA reading, scroll to either STORE to store the calibration, or to ABORT to exit the
menu without storing the calibration. In either case, press [Enter].
Note: If the ammeter reading cannot be adjusted within 5.0 A of the 4 or 20 mA setting, contact the factory for
assistance.
1.3.3 Calibrating the High End of the Output Range
7. The XGM868i returns to the Analog Output window. Scroll to 20 mA, and repeat steps 4 and 5 to calibrate the high
end of the output range.
Note: Skip the following prompt, if linearity testing of the output will not be performed at this time.
1.3.4 Testing Output Linearity
8. Scroll to TEST to test the linearity of the currently selected analog output. Press [Enter].
9. Check the ammeter reading at 50% Full Scale. Then, use the arrow keys to enter a different % Full Scale (0-100%).
Press [Enter] when done.
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