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 re-
checked before start-up. This is very important as failure to adjust the values may cause mal-
functioning during operation. Service may e.g. be in connection with replacement of print cas-
sette, pressure transducers, position transmitters or battery. See also chapter 10. Parts re-
placement.
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 Compressor type
Max.
press.
Max. permissi-
ble deviation
at Atm. press
Meas. point
SAB/
VMY SMC
TSMC/
TCMO HPC HPO
Suct. press. -1 - +9 -1 - +9 -1 - +9 -1 - +25 -1 - +25
33
55
+/- 0.2
+/- 0.5
Disch. press. -1 - +25 -1 - +25 -1 - +25 -1 - +59 -1 - +59
55
200
+/- 0.5
+/- 1.2
Oil press. -1 - +25 -1 - +25 -1 - +25 -1 - +59 -1 - +25 55 +/- 0.5
Diff. press. -1 - +25 -1 - +59 55 +/- 0.5
Interm. press. -1 - +25 55 +/- 0.5
Internal suc-
tion pressure
-1 - +9 33 +/- 0.2
Table 51: Pressure transducers
Select the menu Setup/Configuration/Calibration and the following picture will appear:
Note that some of the entries in the Calibration menu are described in other chapters of this
manual. With the cursor on Pressure, press and the following picture will appear:
Calibration
236/319
Engineering manual - Unisab III 1.10
001930 en 2014.09
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