Hart Trimmer Calibration - WIKA Pascal ET Betriebsanleitung

6. Commissioning, operation
They changeable parameters can be: TAG, DESCRIPTOR, PV decimal units, PV LRV and PV URV.
Press, for example, the button for the TAG value: the following screen appears:
EN
If desired delete all the characters with backspace and insert the desired ones. Then press [ENTER] to store the parameter
inside the HART transmitter; the Pascal will return to the previous display.
HART requires that all the characters must be in upper case in order to be properly stored

6.3.2.8 HART trimmer calibration

When the HART transmitter needs to be recalibrated or adjusted the HART screen shows two types of possibilities:
ADJ.SCL
■
CAL.TRIM (Z,S)
■
With CAL.TRIM permits to correct the analogue mA generation, of the HART
displayed if the output DAC goes out of tolerance.
Zero and span needs to be corrected.
If the user wants to recalibrate the Trim. an INPUT mA measurement channel has to configured as REF channel. In addition,
the loop wiring needs to flow to the IN mA terminals.
If no REF mA input channel is configured first an error will be shown.
From the following screen:
46
®
transmitter, referred to the digital AO value
WIKA operating instructions, model Pascal ET