Additel 226, User Manual

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4. Sensor adjustment

Sensor adjustment is to adjust the PV of the transmitter, usually including one or two adjustment points (lower point
and upper point). Some transmitters do not support this (please refer to the transmitter's manual).

Lower point adjustment
(1) First provide external standard source to the transmitter manually. After stabilized, input the standard source
display value directly by the number keys; For the pressure transmitter, the standard source display value can be
directly obtained through the external pressure module. In this case, click the Get icon on the calibration page to
get the standard value of the pressure module directly.
Note: For some transmitters, it is not needed to input the adjustment value, the transmitter automatically uses the upper and lower
limits of the range (the lower limit of the range corresponds to the lower point adjustment value, and the upper limit of the range
corresponds to the upper point adjustment value) as the adjustment value. In this case, just input any value;
(2) Execute the Trim command. After that, the PV value will change according to the trimmed point value.

Upper point adjustment
Same as the lower point adjustment.

Single point adjustment
Same as the lower point adjustment.

Restore to factory setting
After selecting "Restore Factory", there will come to ask "Are you sure to perform this operation?", click OK to continue.
After that, the transmitter's lower and upper points values will be restored to the factory setting.
Note: The current loop test and D/A adjustment is only available when the transmitter address is 0.
Note: The sensor adjustment provides corresponding support items according to the transmitter function.
Note: If the HART transmitter used does not have all the above functions, contact the manufacturer.