1. INTRODUCTION
Page 1
© 2007 DH Instruments, a Fluke Company
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1.1
PRODUCT OVERVIEW
The GPC1 Gas Pressure Controller is a stand alone, pressure setting and adjusting component intended to
be used as the means of pressure control in high pressure pneumatic calibration and test systems. There are
two models. GPC1-16000 is capable of both setting and precisely adjusting pressure from atmosphere to
110 MPa (16 000 psi). GPC1-10000 covers the range from atmosphere to 70 MPa (10 000 psi).
GPC1 combines the versatility, speed and reliability of direct operator control with the convenience and
effort-free operation of automation. It is the standard pressure control component in a
DHI
PG7202™
piston gauge system or with a
DHI
RPM™ digital reference pressure monitor to configure a transfer
standard based calibration system.
GPC1 requires an external pressure supply equal to the maximum pressure to be adjusted.
This is usually supplied by a gas booster. GPC1’s inlet pressure regulator and indicating gauge are used
to set the inlet pressure to the desired value for the test being run. Two (2) progressive, half-turn needle
valves control the inlet of pressure from the regulator to increase pressure and outlet to atmosphere to
decrease pressure. Very fine pressure adjustment and generation of small pressure excursions is
accomplished using a Pneumatically Driven Variable Volume (PDVV) with push button control.
Pneumatic power (drive air) of up to 850 kPa (120 psi) is needed to drive the PDVV. All of the test
connections are routed through an inclined manifold that serves as a sump to collect liquids and other
contaminants that may return from devices connected to GPC1. The sump includes a drain for purging.
