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
pressure and Pressure before oil filter (optional). (The optional pressure transmitter P6 meas-
uring Intermediate pressure for TSMC/TCMO compressors is fixed at 25 bar and this range
cannot be 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 HPO and HPC reciprocating compressors as
well as for heat pump screw compressors. (Since 2009 HPC compressors have been mounted
with a 59 bar oil pressure transmitter as standard. As from 2011 HPO compressors will also
be mounted with a 59 bar oil pressure transmitter.)
The range 25/59/59/59 is selected (default) for high pressure screw compressors, type SAB
157 HR, e.g. for heat pump operation.
In addition to high pressure screw compressor types, the pressure range 25/59/59/59 can
now also be selected for a range of ‘normal’ screw compressor types.
New screw compressor types:
• SAB 120S - SAB 151L
• SAB 193S - SAB 355X
Set-up
Engineering manual - Unisab III 1.10
001930 en 2014.09
201/319
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