Copyright 2022 Baker Hughes Company.
32 | DPI 610E Instruction Manual–English
Chapter 2. Pump Operations
The above procedure is appropriate for general use, however, the procedure must be modified
when low pressure (350 mbarg) or high vacuum (-950 mbarg) is required.
2.1.7.1 Creating Low Pressure (350 mbarg Full Scale)
Follow these instructions to achieve a low pressure:
1.
Make sure that the device under test is properly connected to the test port and that the
DPI 610E relief valve is fully open (turn counter-clockwise).
2.
Make sure the pressure-vacuum selector is set to the ‘+’ position for the pressure mode.
3.
Turn the fine adjustment knob counter-clockwise until about 2 inches/5 cm of thread is
exposed (from “fully in” position this should take around 15 full rotations).
4.
Close the relief valve (turn clockwise) firmly to hand tight, to seal the system.
5.
Make sure that the internal pressure is displayed on the unit display.
6.
Push the pump slowly and gently and at the same time monitor the display for the increasing
pressure. Stop pumping as soon as the required pressure is reached.
Note:
The required pressure may be achieved with a less than one full pump stroke or it may
require more depending on the device under test volume connected.
7.
If the pressure is below the required value then go back to step 5.
8.
If the pressure indicated is above the required pressure or if on the display shows
> > > >
(i.e. pressure is above the internal sensor full-scale limit) then use the fine
adjustment knob by rotating counter-clockwise slowly to bring the pressure down to the
required value.
A rapid change in pressure/vacuum can damage the instrument. Open the
pressure release valve slowly and monitor the reading on the screen until you
reach the desired pressure/vacuum.
Optional
To decrease pressure/vacuum, open and close the pressure release valve
slowly.
