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displays the current signal value actually measured by the calibrator, the lower channel displays the current value of
PVAO zero point, which is fixed at 4 mA. When calibrating, user can manually enter the measured current value in the
adjustment value input box at the bottom or can click the "Fetch" button to automatically obtain the actual measured
current signal value of the calibrator. After the adjustment value is set, click the application button on the upper right,
and the calibrator send the adjusted value to the transmitter.
Figure 15 D/A adjustment