Engineering manual - UniSAB III 1.10.8
001930 en 2021.06
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Set-up
6.4.7 Measuring
The Measuring menu includes set-up for measuring units, pressure range and misc.
1: Press/temp
Bar/°C
Psi/°F
kPa/°C
Pressure levels and temperatures can be displayed in either:
• SI units: Bar, kPa and °C
• US units: PSI and °F.
2: Pressure Range
9/25/25/25
25/59/25/25
25/59/59/59
Shows the pressure range for the pressure transmitters mounted on the compressor.
The shown pressure range order is P1/P2/P3/P4, i.e. Suction pressure, Discharge pressure, Oil pres-
sure and Pressure before oil filter (optional).
The optional pressure transmitter P6 is used for the following purpose:
Purpose Range
Compressor type
Intermediate pressure -1 to 25 Bar
TSMC and TCMO
Internal suction pressure -1 to 25 Bar
SABflex 159
Oil pressure 2
-1 to 59 Bar
SAB 193 H - SAB 355 H and SAB
273 S
These P6 sensor ranges as shown here are fixed and will not be changed in case the Pressure range
parameter is changed.
The range 9/25/25/25 is selected (default) for ordinary screw and reciprocating compressors.
The range 25/59/25/25 must be selected for HPC reciprocating compressors mounted with an oil filter
differential pressostat and for HPC/HPO reciprocating compressors mounted with a 25 bar oil pressure
transmitter. It may also be selected for screw compressors running at e.g. high suction pressure.
The range 25/59/59/59 is selected (default) for high-pressure reciprocating compressors, types HPO,
HPC and HPX. (Since 2009/2011, HPC and HPO compressors respectively have been mounted with a
59 bar oil pressure transmitter as standard).
The range 25/59/59/59 is selected (default) for high-pressure screw compressors, type SAB 157 HR
and SAB 193 H - SAB 355 H and SAB 273 S (e.g. for heat pump operation).
In addition to the high-pressure reciprocating compressors, the pressure ranges 25/59/25/25 and 25/59/
59/59 can now also be selected for the ‘normal’ reciprocating compressor types:
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