Software Calibration, Hydraulic Slide Systems - Johnson Controls SABROE UniSAB III Engineering Manual

7.5.14

Software calibration, hydraulic slide systems

When the capacity/Vi slide position transmitter has been adjusted (see subsections 7.5.1 to 7.5.12) or if
it is not possible to calibrate the transmitter itself, this function can be used to adjust/fine-tune the signal.
It is possible to software calibrate both capacity and Vi slide position in the same picture. Select Setup/
Configuration/Calibrate/Position.
Minimum position (0%) should always be calibrated before maximum position (100%).
Move the capacity or Vi slide to minimum position as described in subsections 7.5.2 to 7.5.4 You can
move the capacity slide down in position by pressing the
(cap. slide position or Vi slide position) is not showing 0.0%, but e.g. 1.5%, position the cursor at Cap.
Zero Adjustm. or Vi zero adjustment and change the calibration value to -1.5%.
Then move the capacity or Vi slide to maximum position as described in subsections 7.5.2 to 7.5.4 You
can move the capacity slide up in position by pressing the
slide position or Vi slide position) is not showing 100.0%, but e. g. 95.8%, position the cursor at
Cap.100% Adjustm. or Vi 100% adjustment and change the calibration value to +4.2%.
If recalibration is needed it is recommended to reset both Zero Adjustm. and 100% Adjustm. to 0.0 be-
fore recalibration is carried out.
Note: If the capacity/Vi transmitters cannot be calibrated the calibration values used in Software adjust-
ment are usually higher. Eg the values used for a SAB 193 L are approximately -46.8% for Cap. Zero
Adjustm. and +49.3% for Cap. 100% Adjustm. Similarly the volume slide values for a SAB 193 L are ap-
proximately -37.7% for VI Zero Adjustment and +61.8% for VI 100% Adjustment.
F3 /CAP. DOWN button. If the actual reading
F2
/CAP.UP button. If the actual reading (cap.
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Calibration
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