PPCH™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company
Page 146
Figure 19.
Internal reservoir schematic
5.6.1.2
DRAINING THE INTERNAL RESERVOIR
To drain the internal reservoir, proceed as follows (see illustration Figure 19):
Check that
RESERVOIR FILL/DRAIN
valve is set to
OPEN
. Open if
necessary (do not open the valve if the internal reservoir accessories are not
installed).
Check that the
OVERFLOW
port is NOT plugged. Unplug if necessary.
Very slightly loosen the 1/4 in. swage nut that connects the
FILL/DRAIN
tube
assembly to the
FILL/DRAIN
port.
Prepare a receptacle to catch the drained fluid under the
FILL/DRAIN
tube.
Reservoir contents when full is about 300 cc.
Rotate
the
FILL/DRAIN
tube assembly downward to a vertical position in which
fluid runs out the tube. The reservoir should drain fully in a few moments.
If you have drained the reservoir because the test fluid has become
contaminated or broken down, consider purging the fluid in the PPCH system
(see Section 5.6.3).
5.6.2
EXTERNAL RESERVOIR
These instructions apply only when an external reservoir is being used. See Section
2.3.6.2 to install an external reservoir. See Section 5.6.1 if NOT using an external reservoir.
5.6.2.1
FILLING THE EXTERNAL 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). If the external reservoir
has been installed as recommended in Section 2.3.6.2, the reservoir level warning
system is still active.
