GPC1-10000 / GPC1-16000™ OPERATION AND MAINTENANCE MANUAL
High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases
can be released unexpectedly and with extreme force. High pressure systems should be assembled
and operated only by personnel who have been instructed in proper safety practices.
Information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any
form or by any means, electronic or mechanical, for any purpose, without the express written permission of DH Instruments, a
Fluke Company 4765 East Beautiful Lane Phoenix AZ 85044-5318 USA.
DH Instruments makes sincere efforts to ensure accuracy and quality of its published materials; however, no warranty, expressed
or implied, is provided. DH Instruments disclaims any responsibility or liability for any direct or indirect damages resulting from the
use of the information in this manual or products described in it. Mention of any product or brand does not constitute an
endorsement by DH Instruments of that product or brand. This manual was originally composed in English and was subsequently
translated into other languages. The fidelity of the translation cannot be guaranteed. In case of conflict between the English version
and other language versions, the English version predominates.
DH Instruments, DH, DHI, DH500, GPC1, OPG1, PG7000, PG7202 and RPM are trademarks, registered and otherwise, of DH
Instruments, a Fluke Company.
Swagelok is a registered trademark of Swagelok Company.
Teflon is a registered trademark of 3M Corporation.
Krytox is a registered trademark of the Dupont de Nemours Company.
1.3.1 FRONT PANEL..............................................................................................................................................3
1.3.3 SYSTEM SCHEMATIC ..................................................................................................................................4
2.3.1 SET UP GPC1................................................................................................................................................7
2.3.2 CONNECT PNEUMATIC POWER (DRIVE AIR) ...........................................................................................7
2.3.3 MAKE HIGH PRESSURE GAS SUPPLY CONNECTION.............................................................................8
2.3.4 MAKE HIGH PRESSURE GAS INTERCONNECTIONS...............................................................................8
2.3.4.1 CONNECTING TO A DHI RPM OR PG7202 USING THE STANDARD
2.3.4.2 OTHER HI G H P N E U M A T I C P R E S S U R E I N T E R C O NN E C T I O N S .........................................................9
2.3.4.3 RECOMMENDATIONS FOR TEST PORT CONNECTION, USE AND DUT CLEANLINESS
2.4 POWER UP AND VERIFICATION.........................................................................................................12
2.4.1 APPLY THE HIGH PRESSURE SUPPLY...................................................................................................12
This manual provides the user with the information necessary to operate a GPC1 Gas
Pressure Controller. It also includes a great deal of additional information provided to help you optimize
GPC1 use and take full advantage of its many features and functions.
FOR THOSE OF YOU WHO “DON’T READ MANUALS”, GO DIRECTLY TO SECTION 2.3 TO SET UP YOUR GPC1.
THEN GO TO SECTIONS 2.4.5 and 3.1. THIS WILL GET YOU RUNNING QUICKLY WITH MINIMAL RISK OF
CAUSING DAMAGE TO YOURSELF OR YOUR GPC1. THEN… WHEN YOU HAVE QUESTIONS OR START TO
WONDER ABOUT ALL THE GREAT FEATURES YOU MIGHT BE MISSING, GET INTO THE MANUAL!
(Caution) is used throughout the manual to identify user warnings and cautions.
(NOTE) is used throughout the manual to identify operating and applications advice and additional
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.