OPG1™ Operation and Maintenance Manual
©2000
DH Instruments, Inc
.
Page
14
2.4.2
ADJUST HYDROPNEUMATIC PUMP DRIVE AIR PRESSURE
This section assumes that the OPG1-30000-AF system has already been set up, including
pressure interconnection (see Section 2.3).
OGP1 hydraulic output pressure is directly proportional to pump DRIVE pressure. When the
OPG1 INLET valve is opened, the full pump pressure may be applied to the test system
very rapidly. ALWAYS adjust the pump pneumatic drive pressure low enough so that the
maximum pump output does not exceed the maximum pressure rating of the devices to which
OPG1 is connected.
Turn the
DRIVE SET Regulator
CW and observe the
PUMP DRIVE Gauge
to set the drive
air pressure to the desired level (the BLUE indication on outside of gauge gives the
approximate
maximum oil pressure that will be generated).
2.4.3
CHECK PROPER OPERATION OF HYDROPNEUMATIC PUMP AND
LEAK CHECK
Checking the proper operation of the hydropneumatic pump and leak checking has two
steps. The first step is purging air from the pump hydraulic circuit. The second step is
generating high pressures.
2.4.3.1
STEP ONE: PURGING AIR FROM THE HYDRAULIC PUMP CIRCUIT
Proceed as follows (numerical references refer to Section 3.1, Figure 6):
Verify that there is oil in the tank and verify that all test connections are plugged
or dead ended.
Open
the
OUTLET valve
(8) fully.
Open
the
INLET valve
(9)
fully.
If drive pressure has been properly connected and set (see Section 2.4.2), pump
should begin cycling.