GE Druck DPI 615 IS, User Manual, Page: 71 / 95

K0430 Issue No. 2 62
5. Continue use of the priming pump (2) until only hydraulic fluid and no air is expelled
from the bleed point.
6. Close the UUT bleed valve (5) when the priming pump (2) is at the bottom of its stroke
(fully pushed in) and slowly wind out the screw-press (3) to its fullest extent to draw
in further hydraulic fluid (approx. 7cc or 0.43 in
3
).
7. Switch the instrument ON and, still using the priming pump (2), pressurize the
system to approximately 2 bar (30 psi).
8. Close the isolation valve (6) disconnect the bleed hose assembly (1) from the priming
port.
Operation
To obtain a pressure reading, proceed as follows.
1.
Switch the instrument ON and select the required TASK .
2. Rotate the screw-press clockwise to increase the applied pressure.
Note: When hydraulic fluid is compressed and flows through a restriction, there is an
increase in temperature that affects the pressure. Allow sufficient time for this
pressure reading to stabilize before recording or logging a reading.
3. After testing, reduce the pressure in the system to zero by turning the screw-press
counter clockwise. Before disconnecting the UUT, open the isolation valve.
4. Remove the connection to the UUT and fit a blanking plug into the instrument’s
pressure port. Clean any spilt fluid off the instrument case.
Draining the Hydraulic Fluid (Figure A3)
To drain the hydraulic fluid from the instrument, proceed as follows:
1. Turn the isolation valve (4) fully counter clockwise. Turn the instrument onto the left
hand side (pressure port nearest to the work bench). Place receptacle below the
pressure port to collect hydraulic fluid.
2. Drain the system by slowly winding in the screw-press (3) and then depressing the
priming pump (2) plunger to expel any fluid remaining in the instrument.
3. If necessary, apply an air line to the priming port to clear any remaining fluid out of
the instrument.
Hydraulic Calibrator Versions Operation