Calibration; Before Start-Up; Pressure Transducers - Johnson Controls SABROE UniSAB III Engineering Manual

7. Calibration

7.1

Before start-up

Before initial compressor start-up and after service, adjustment of transducers and position transmitters
must be carried out. Their values are usually preset from factory but must be rechecked before start-up.
This is very important as failure to adjust the values may cause malfunctioning during operation. Service
may for example be in connection with replacement of controller module, pressure transducers, position
transmitters or battery. See also chapter 10. Parts replacement.
Insufficient or incorrect setting of pressure transducers may cause compressor breakdown or
personal injury.
The temperature sensors must not be calibrated as they are connected electrically with four conductors
which automatically makes up for line resistance.
7.2

Pressure transducers

Calibrate the pressure transducers at atmospheric pressure in the compressor.
Use the following pressure transducers:
Unit = bar
SAB/
Meas. point
VMY
Suction
-1 - +9
pressure
Discharge
-1 - +25
pressure
Oil pressure
-1 - +25
Oil filter
-1 - +25
pressure
Intermediate
pressure
Internal suction
pressure, -1 - +25
SABflex
Internal suction
pressure, -1 - +9
SABCube
Oil pressure 2
-1 - +59
Table 54: Pressure transducers
Select the menu Setup/Configuration/Calibration and the following picture will appear:
Compressor type
TSMC/
TCMO
SMC
-1 - +9 -1 - +9 -1 - +25
-1 - +25 -1 - +25 -1 - +59
-1 - +25 -1 - +25 -1 - +59
-1 - +59
-1 - +25
258/346
Max.
HPC/
press.
HPO
HPX
-1 - +25
-1 - +59
200
-1 - +25
200
200
200
Engineering manual - UniSAB III 1.10.8
Calibration
Max. permissi-
ble deviation at
Atm. press
33 +/- 0.2
55 +/- 0.5
55
+/- 0.5
+/- 1.2
55 +/- 0.5
+/- 1.2
55 +/- 0.5
+/- 1.2
55 +/- 0.5
55 +/- 0.5
33 +/- 0.2
+/- 1.2
001930 en 2021.06