User manual DHI HIGH PRESSURE FILTER KIT FOR PPCH PN 402376 INSTRUCTION SHEET

[. . . ] HIGH PRESSURE FILTER KIT P/N 402376 Instruction Sheet HIGH PRESSURE FILTER KIT, INCLUDES: DESCRIPTION QTY PART NO. High Pressure Filter Instruction Sheet 1 1 103739 560083 Figure 1: High Pressure Filter INTRODUCTION The High Pressure Filter (see Figure 1) is intended for use with the PPCH Hydraulic Pressure Controller. [. . . ] 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. 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. Figure 2: Installation of filter on stand alone PPCH. 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 3: Installation of filter on PPCH with a PG7302. Document 560083 060424 DH Instruments, Inc. 4765 East Beautiful Lane Phoenix AZ 85044-5318 USA Tel 602. 431. 9100 Fax 602. 431. 9559 dhi@dhinstruments. com www. dhinstruments. com [. . . ]