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C HAPTER 6 ______________________________________________ CALIBRATION AND ADJUSTMENT
•
Check that the reading corresponds with the reading of the reference instrument. If not, adjust the second point.
•
If necessary, adjust with the arrow switches to the correct value and press ENT. At the second calibration point the second LED from the left flashes.
Calibration of the analogue outputs
The analogue outputs have been calibrated at the factory and since they are very stable, calibration of the outputs should be performed only when there is reason to believe that their adjustments have changed.
Using serial commands
Disconnect the security lock jumper!
ACAL <cr>
The outputs on channels 1 and 2 are measured and the measured values (mA or V) entered as calibration coefficients.
Example: both channels have 0...10 V outputs (set with AMODE command); enter the voltages measured at the analogue outputs:
>ACAL <cr>
Ch1 U1 ( V ) ? 0.123 <cr>
Ch1 U2 ( V ) ? 9.98 <cr>
Ch2 U1 ( V ) ? 0.120 <cr>
Ch2 U2 ( V ) ? 9.98 <cr>
Using display/keypad commands
Disconnect the security lock jumper!
•
Connect an ammeter/voltmeter to the output of channel 1, select
Cali
in the main menu and
Analog outputs
in the Cali menu. The following is displayed (the quantity can be either mA or V):
V AISALA _________________________________________________________________________ 63
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