PCM-2 Manual.pdf - Voss Associates

- A 1/8" ID gas "supply" hose with sealing quick-connect fitting (FGPL31) to the outlet
"1''' of the inlet solenoids (ports 1).
- A 12 volt de power supply has been connected to the gas manager
via either clip leads or a connector harness (Tie pin 1 of connector
J1 to power supply ground and apply Z+ 12 volts de to J1 pin 3), or
via a 115vAc to 12vdc plug in adapter (MEVE165).
- The gas manager has been set for an operating pressure of 0.25
inches of water (±0.005").
2. A supply of P-1 a or dry nitrogen gas, regulated to 2-3 psi. connected to the inlet
hose "1''' of the manager's inlet solenoids (ports 2).
CAUTION:
Application of pressure greater than 5 psi to the gas
manager, even momentarily, will destroy its expensive
and non-repairable pressure transducer component.
While the gas manager will attempt to regulate gas
pressure at a safe level, incorrect plumbing or electrical
connection may result in damage.
3. A flowgage capable of measuring flow rates of 100 - 1000 cclmin (FTFM8)
and a needle valve (FGMI51) has been plumbed in series upstream of the .005 orifice
and flow has been regulated to 100-200 cclmin independent of the gas
management system.
NOTE:
PCM IB Gas Manager already incorporates these flowmeters and
needle valve parts.
4. P-10 or methane gas detector.
Setup and Testing:
This test is the final check for completed PCM-2 probe assemblies prior to their
installation in the instrument.
I. Remove the hose from the outlet hose barb of the gas manager's ilowmeter and regulate the free
gas flow with the needle valve to approx. 200 cc/min. When this flow adjustment has been made.
reconnect the hose to the flowmeter where removed.
Install an exhausting quick-connect fitting in one of the probe's gas fittings
to equalize the pressure of the probe to ambient prior to testing.
3. Remove the exhausting quick-connect fItting from the probe and replace it with
the gas "return" hose quick-connect fItting \vhich leads to the pressure
transducer's port P2.
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Connect the manager's gas "suprly" hose to the other gas fItting on the probe.
5. Tum on electrical power to the gas manager. The solenoid valve will at this
time supply gas to the probe, and indicate same with "Gas Flowing" display.
! (l·129-t\52S/PCM-2 Det. Voltage &. Leak Test l)roeedun;/Revislon/March 1994