If a leak is indicated perform the INTERNAL LEAK
TEST. This test isolates the PCS 400 internal pneu-
matics from the outside system by closing the
output shutoff solenoid valve, L3. If the internal
leak test proves negative then look for the leak
upstream beginning at the MEASURE/CONTROL
port fittings and working toward the pressure
source. If the INTERNAL LEAK TEST also shows
a leak of about the same magnitude as the system
leak test then the leak is inside the instrument.
If no leaks are indicated the instrument is ready for
duty. The next section (Local Operation) offers
instructions on operating the instrument from the
front panel (Local), and the following section (Re-
mote Operation) deals with the procedure for op-
erating the unit from a computer (Remote).
PCS 400 INSTALLATION
www.mensor.com 2-3
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