User Guide

Document 560083 060424
DH Instruments, Inc.
4765 East Beautiful Lane
Phoenix AZ 85044-5318
USA
Tel [phone]
Fax [phone]
[e-mail]
www.dhinstruments.com
HIGH PRESSURE FILTER KIT, INCLUDES:
DESCRIPTION QTY PART NO.
High Pressure Filter 1 103739
Instruction Sheet 1 560083
INTRODUCTION
The High Pressure Filter (see Figure 1) is intended for use
with the PPCH Hydraulic Pressure Controller. The filter
connects to either a stand alone PPCH (see Figure 2) or to
a PPCH with a PG7302 (see Figure 3). This document
contains instructions for connecting the fittings and tubing
for optimal proper performance.
The filter has DH500 fittings at either end. This is the same
type of fitting that is on the PPCH TEST port. It is important
that the filter be positioned and oriented as shown in Figure
2 and Figure 3. In particular, the filter should not be installed
between the PPCH and the PG7302 piston gauge.
CLEANING OR REPLACING THE FILTER
Depending on operating conditions, the filter may become
filled with contaminants from the test circuit. This means the
filter is doing its job.
If the filter shows signs of reduced flow, the filter should be
replaced with a new filter. Alternatively the filter may be
backwashed to remove contaminants, however
backwashing must be done very carefully to avoid
introducing contaminants to the PPCH. The safest
backwash method is to disconnect the inlet (DUT side) of
the filter and use the PPCH prime function to run oil through
the filter and into a catch vessel.
Disconnecting the filter to run a high pressure solvent
through the filter elements may be done but great care must
be taken to ensure that the solvent is completely removed
and no particles or contaminants are introduced to the outlet
(PPCH side) of the filter.
If the filter becomes clogged in use then a pressure
difference between the PPCH or PPCH/PG and the DUT
may result during pressure ramps, including vent. This
could prevent proper operation and cause significant
measurement error.
Figure 1: High Pressure Filter
Figure 2: Installation of filter on stand alone PPCH.
Figure 3: Installation of filter on PPCH with a PG7302.
HIGH PRESSURE FILTER KIT
P/N 402376
Instruction Sheet