OPG1™ Operation and Maintenance Manual
©2000
DH Instruments, Inc
.
Page
16
The pump should begin to cycle and the pressure indicated on the high pressure
device should increase. If the pump does not cycle, the drive pressure is set too
low or the pump is not operating correctly. If the pump cycles but the pressure
does not increase:
•
The pump is not properly primed (see Section 2.4.3.1).
•
There is a leak in the system to which the OPG1 is connected or in the
OPG1 itself.
•
Air flow to the pump is too low.
•
The pump is not operating properly.
Keep
INLET valve
(9) open until the desired oil pressure is set.
Fully
close
INLET valve
(9).
Leak Check:
The pressure indicated by the high pressure device connected to
the
TEST port
should stabilize and hold. If it does not, there is a leak in the
system to which OPG1 is connected or in OPG1 itself.
The time required for pressure to stabilize after the pressure has been changed
is directly proportional to the volume connected to OPG1 and the mechanical
stability of the volume's connections and vessels. To reduce stabilization time,
go beyond the pressure set point and return. Be sure the pressure has had time
to stabilize before concluding there is a leak in the system.
When leak checking is complete, slowly open the
OUTLET valve
(8) to remove
pressure and vent to atmosphere.
2.4.4
PRECAUTIONS TO TAKE BEFORE GENERATING
PRESSURE/SAFETY CONSIDERATIONS
Before using the OPG1 to generate and adjust pressure, consider the following:
•
Check that all connections, vessels and DUTs connected to OPG1 are rated for the
pressure to be generated and that all fittings are properly tightened.
•
If the OPG1 is being used with an RPM3/HPMS, be sure that the HPMS valve is set to
shut off the low RPT of the RPM3 if pressure greater than 400 MPa (6 000 psi) will
be generated.