5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION
Page 145
© 2009 DH Instruments, a Fluke Company
OPERATION
The procedure to adjust the output of the utility sensor is the same as for the calibration of an Internal, Hi (IH),
Q-RPT (see Section 5.3.1), but the calibration reference uncertainty can be between 0.01 and 0.05 % FS.
To view/edit the calibration information for a utility sensor, use
[SPECIAL]
,
<8cal>
,
<1Hi RPT>
. The
position designator of a PPCH utility sensor is always
<IuH>
.
5.6
FILLING AND DRAINING THE FLUID RESERVOIR
5.6.1
INTERNAL RESERVOIR
Before attempting to fill or drain the internal reservoir, the internal reservoir accessories
must be installed on PPCH (see Section 2.3.6.1).
These instructions apply only when NO external reservoir is being used. See Section
5.6.2 if using an external reservoir.
5.6.1.1
FILLING THE INTERNAL RESERVOIR
PPCH has a level detector in its internal reservoir. When the fluid level is low,
the condition is indicated by an audible alarm and intermittent display of <Reservoir
level low> on the display bottom line (see Section 3.5.7.3).
To fill the internal reservoir, proceed as follows (see illustration Figure 19):
Check that
RESERVOIR FILL/DRAIN
valve is set to
OPEN
. Open if
necessary and observe the reservoir fluid level in the acrylic
FILL/DRAIN
tube (do not open the valve if the internal reservoir accessories are not
installed).
Check that the
RESERVOIR RETURN
valve is set to
INTERNAL
. Set to
INTERNAL
if necessary.
Check that the
OVERFLOW
port is NOT plugged. Unplug if necessary.
Slowly pour fluid into the
FILL/DRAIN
tube using the supplied funnel. Fill up
to, but not over, the
MAX FILL
line. Only fill the PPCH with the same fluid
with which it was previously filled. Do not mix or attempt to change fluids.
Should the reservoir be overfilled, excess fluid will drain out of the
OVERFLOW
port and should be apparent in the
FILL/DRAIN
tube. In order for the PPCH
internal reservoir fluid head reference level to be correct, it is necessary to drain
oil until the level is below the
MAX FILL
line (see Section 5.6.1.2).
