20 - 4
Section B Body & Framework
9803/3280
Section B
20 - 4
Issue 1
Service Procedures
Electronic Vacuum Gauge
The CPS VG100 vacuum gauge is an electronic type using
LED’s to indicate various states of vacuum. It is used in
place of or to supplement the gauge on the vacuum pump.
Before connecting into the system switch on to check that
the first LED lights to show that the battery is in good
condition.
Note: The indicator lights show pressure in inches of
mercury (Hg) and vacuum in microns (0.001mm Hg).
ATM/BAT Normal atmospheric pressure reading.
Battery condition.
15’’/510mbar 381mm (15 in)Hg. Partial vacuum -
Vacuum system is operating.
29’’/980mbar 736mm (29 in)Hg. No vacuum drawn -
Possible system leakage.
8000µ 8.0mm (0.31 in)Hg. Partial vacuum -
If the reading does not progress the
system may have a slow leak.
1000µ 1.0mm (0.039 in)Hg. Deeper vacuum.
600µ 0.6mm (0.023 in)Hg. Deep vacuum.
400µ 0.4mm (0.015 in)Hg. Deep vacuum.
200µ 0.2mm (0.0078 in)Hg. Deep vacuum.
25µ 0.025mm (0.00098 in)Hg. Pump Test.
Maximum sustainable vacuum.
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