P3800 Series
Users Manual
3-6
glf08.bmp
Figure 3-7. Close Reserve Valve
4.
Close reservoir valve (3).
5.
Turn capstan in to generate system pressure. The displaced fluid from the ram screw
moves the intensifier piston, generating system pressure to lift the measuring piston
and weights.
Generating Calibration Pressure
To generate any required pressure select weights so that the sum of all the weights (their
pressure equivalents are marked on the top of each weight) PLUS the pressure marked on
the carrier is equal to the pressure required. Load the weights onto the carrier one at a
time, ensuring correct location.
Generate pressure by winding the capstan in (clockwise) until the weight stack starts to
rise. Spin the weight stack in a clockwise direction at approximately 40 rpm by using the
palms of the hands on opposite side of the stack.
Adjust the height of the weight stack winding the capstan in or out until the underside of
the bottom weight lines up with the mid-float position marked on the indicator rod (see
Figure 3-8). The areas above and below the mid-float position indicate the upper and
lower travel limits of the piston assembly.
Before adding or removing weights, it is essential that the weight stack is no longer
spinning.
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