Additel 273E Series, Руководство пользователя

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3. D/A Adjustment
By adjusting the current output of the HART transmitter, the zero point (4mA) and full scale (20mA) output values of the
transmitter PVAO are consistent with the actual output loop current value.
Take D/A zero calibration as an example. After entering this calibration mode, the upper channel of the interface
displays the current signal value actually measured by the calibrator (ADT226/227), 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 14 D/A adjustment