Note: The pressure values shown are examples only.
At atmospheric pressure the value of the pressure transducer must be within the limits for
"Max. permissible deviation at atm.pressure" as indicated in Table 51. 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 meas-
ured 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 only relevant for screw compressors and Interm. Pressure only for
two-stage reciprocating compressors.
The following picture should now appear:
Pressure transducer calibration has been carried out correctly.
Calibration
Engineering manual - Unisab III 1.10
001930 en 2014.09
237/319
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