DH Instruments PPCH, Руководство по эксплуатации и обслуживанию

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PPCH™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 10
The internal reservoir attachments include:
- Reservoir fill tube bracket, p/n 123832 (grey painted bracket)
-
(2) M3 x 8 bolts, p/n 101010-Z
- Reservoir fill tube assembly, p/n 402039 (1/2 in. PFA tube with fittings
attached)
-
Funnel p/n 123959
To prevent draining the reservoir accidentally, leave the RESERVOIR FILL/DRAIN
valve in the CLOSED position whenever the internal reservoir or external reservoir
attachments are not installed. Opening the FILL/DRAIN valve opens the FILL/DRAIN
port to the reservoir.
To set up to use the internal reservoir without an external reservoir, proceed as
follows (numeric references refer to Figure 3):
Install the reservoir fill tube bracket(1) to the PPCH rear panel using 2 ea. M3
x 8 bolts(3).
Install the reservoir fill tube assembly(4) by connecting the 1/4 in. swage
female on the assembly to the 1/4 in. swage male
FILL/DRAIN
connection.
Remove and retain the stainless steel cap that is installed on the connection
as delivered. Orient the PFA tube vertically. Bend the tube slightly to extend
through the reservoir fill bracket.
There is a red plug with a center pull tab in the end of the PFA tube. This
should be left in place when the funnel is not being used to prevent
contamination and/or evaporation of the fluid. The funnel(2) can be stored in
the holder just behind the tube.
Open the
FILL/DRAIN
valve(5). Fluid may enter the fill drain tube(4).
Check that the
EXTERNAL
port(6) is plugged. It is plugged when delivered.
If it is not, use a 1/8 in. NPT M plug with Teflon® tape on the threads to plug
it. Not plugging the
EXTERNAL
port when using the internal reservoir only
will cause the fluid exhausted from the PPCH to leak out rather than
returning to the reservoir.
Check that the
OVERFLOW
port(7) is open to atmosphere and
unobstructed. This assures the reservoir is open to atmosphere so proper
system venting and zeroing can occur.
Be sure the
RESERVOIR RETURN
valve(8) is on the
INTERNAL
position.
Check the level of the fluid in the fill/drain tube. If the level is below the
MAX
FILL
position, top off the tank. See Section 5.6.1 for information on filling
and draining the PPCH internal reservoir.
The PFA reservoir fill tube is delivered with a red plug with a center pull tab
installed. This plug can be used after the tube is installed to cover the opening
and reduce evaporation of the fluid. The plug is vented.