ABB DSAI 155 Adjusting plate Temperature plate

Description

Adjustment for Boards DSAI 145/146 and DSAI 151
It is easiest to perform the adjustment of the Pt100 temperature board with accurate resistors as
references.
Select an input and corresponding data base element for the adjustment. If you select an unused
input, ensure that ACT is set to 1 and afterward reset to 0.
Select a signal with CONV_PAR=640°C or change CONV_PAR in the data base element
selected. Make the updating continuous by setting DEADB=-1 or 0 and FILTER_P = 0 (note
previous values so that they can be reinstated after the adjustment).
Connect a 100 ohm resistor ±0.01% (0°C for Pt 100 transducer) to the selected input on the
connection unit.

Jumper all inputs not used.
Zero Point Adjustment
The Z potentiometer need not be field-adjusted since the software handling of DSAI 145/146
and DSAI 151 has automatic zero adjustment (which offsets any adjustment within 10 seconds).
If the Z potentiometer is not adjusted correctly, it is sufficient to set it to the middle of its range.
If, however, you find a setting where the Fault LED is lit (reference channel error), turn the
potentiometer away from this setting.
Adjustment of Full-Scale Value
Connect a 300 ohm resistor ±0.01% (which corresponds to 558°C for a Pt100 transducer).
Adjust the potentiometer G on the board front at the same time as the value in the data base is
read as it was previously. The full-scale value is adjusted correctly when the VALUE is 558°C.
(Read VALUE continuously using the subcommand GVD.)

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