DH Instruments MOLSTIC-S, Руководство по эксплуатации и обслуживанию

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MOLSTIC-S™ OPERATION AND MAINTENANCE MANUAL
© 2004-2007 DH Instruments, a Fluke Company
Page
22
Set regulator outlet pressure to minimum: Rotate the knob of the
pressure reducing regulator in the counterclockwise direction until the spring
force of the diaphragm is relieved. Insure that the shut-off valve(s) is in the
closed position.
Be sure that the molstic-S Supply Assembly or molstic-S shut-off
valve(s) is closed before connecting the quick connector stem to the
quick connector body (located on the regulator’s inlet).
Connect the gas supply: Connect the gas supply to the quick connector
stem (1/4 in. or 1/2 in. tube). The gas supply pressure should not exceed
1.7 MPa (250 psig). Insert the stem into the quick connect body.
2.4.1.2 MOLSTIC-S USE WITH REGULATORS NOT SUPPLIED
BY DHI
The inlet gas supply to the molstic-S must be suitably regulated prior to
connection to the inlet of the molbloc-S plumbing. In addition, a shut-off valve
should be used downstream of the regulator in order to allow for system leak
testing. The pressure reducing regulators supplied by
DHI are selected for the
following characteristics:
• High quality
• High sensitivity and stability
• Outlet (control) pressure range: 0 to 100 psig
• Non-venting – does not relieve control pressure outside of plumbing
• Low droop (change in control pressure with change in flow rate)
• Low inlet pressure effect (change in control for a given change in supply pressure)
• Flow capacity – capability to flow to maximum required flow rate
Set regulator outlet pressure to minimum: Rotate the knob of the user
supplied pressure reducing regulator in the counterclockwise direction until
the spring force of the diaphragm is relieved. Insure that the shut-off valve(s)
is in the closed position.
Connect the gas supply: Connect the gas supply to the pressure regulator’s
inlet port using suitable means and compatible fittings. The gas supply
pressure should not exceed the regulator’s maximum operating pressure.
2.4.2 INLET CONNECTION - MOLSTIC-S USE WITH DUT
UPSTREAM
DUTs that have built in flow control capability, such as MFCs, (and are to be tested in
flow control mode) must be tested in the upstream location. Install this type of DUT
upstream of the molbloc-S only.