Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
259/346
Calibration
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:
Note: The pressure values shown are examples only.
At atmospheric pressure the value of the pressure transducer must be within the limits for "Max. permis-
sible deviation at atm.pressure" as indicated in Table 54. If this is not the case, the value will be outside
its tolerance and the transducer must be replaced.
The pressure levels are measured in bar (relative pressure) and at atmospheric pressure the reading
must show 0.0 bar to be correct. As it appears from the above example, the measured pressure levels
are not 0.0 bar. Consequently calibration must be carried out.
Place the cursor on Suction Adjustm. and use the key to change the value. Now change the Suction
Adjustm. value to 0.1 bar with opposite sign. Note that the adjusting value is in 1/100.
Change Suct. adjust to the value -.10. Adjust the other pressure levels in the same way.
Note: Oil Filter Pressure is relevant for screw compressors and SMC reciprocating compressors.
Interm. Pressure is relevant for two-stage reciprocating compressors.
Oil 2 Pressure is relevant for heat pump screw compressors.
The following picture should now appear:
Pressure transducer calibration has been carried out correctly.
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