Electrical Slide Systems (Certain Screw Compressors); Manual Slide Positioning; Transmitter Adjustment - Johnson Controls SABROE UniSAB III Engineering Manual

Calibration
7.6

Electrical slide systems (certain screw compressors)

The built-in capacity slide position transmitter must be adjusted correctly to ensure safe and reliable
slide control. This adjustment must always be carried out as described in 7.6.2 Transmitter adjustment.
Afterwards, the capacity signal must be adjusted by software as described in 7.5.14 Software calibra-
tion, hydraulic slide systems.
7.6.1

Manual slide positioning

Contrary to hydraulic slides, the electrical capacity slide can be positioned manually for testing. This is
useful when performing transmitter adjustment and software adjustment. Select Setup/Compr. Control
Mode = Stop and then Setup/Configuration/Calibrate/Position.
The following picture will appear:
While this picture is open (and UniSAB III is still in Stop mode) the capacity slide can be moved by
means of F2 /CAP. UP and
Note that when reaching the end stop, the shutdown Capacity error will be displayed after two seconds.
Release the button at once and reset the shutdown.
7.6.2

Transmitter adjustment

The capacity transmitter is fitted with a single calibration button surrounded by a green and a red LED
as shown in Fig. 42.
Calibration
LED position
push button
(Green)
Normally, not visible
For calibration
remove cover
Fig. 42: Capacity transmitter
Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
F3
/CAP. DOWN.
LED-working
(Red)
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