1. INTRODUCTION
Page 1
© 2007 DH Instruments, a Fluke Company
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1.1
PRODUCT OVERVIEW
PPCH-G is a pressure controller intended to precisely set and control high pneumatic pressure into a
closed volume as is commonly needed for the calibration and testing of pressure measuring instruments.
It has been designed to provide very high performance combined with maximum versatility and ease of
use. Four different control modes are available for different applications.
PPCH-G can be equipped with a low cost utility sensor for pressure monitoring or one or two Quartz
Reference Pressure Transducers (Q-RPTs) to allow it to set and measure pressure with higher precision
and very low measurement uncertainty. Up to two external Q-RPTs in an external Reference Pressure
Monitors (RPM4), can also be integrated into a PPCH-G system. A on-board barometer is included for
atmospheric pressure compensation of gauge mode measurements and as a reference for AutoZero in
absolute measurement mode.
PPCH-G requires a constant gas pressure supply greater than the maximum pressure to be controlled. This
can be supplied by a
DHI
GB-H-152-70M or GB-H-100M gas booster package. Pressure control is achieved
by servo-motor controlled, high pressure needle valves and a thermal pressure control system.
PPCH-G is controlled locally by the operator using a front panel display, keypad and function keys or
remotely by a computer using ASCII character command strings over an RS232 or IEEE-488.2 interface.
PPCH-G models are available to measure and control pressure in ranges from as low as 10 MPa (1 500 psi)
to 100 MPa (15 000 psi) in absolute and gauge measurement modes.
PPCH-G is the standard automated pressure control component for automated pressure control in
ranges greater than 10 MPa (1 500 psi) in PG7202 high pressure gas piston gauge systems.
1.2
SPECIFICATIONS
1.2.1
GENERAL SPECIFICATIONS
Power Requirements
85 to 264 VAC, 50/60 Hz, 75 W max consumption
Operating Temperature Range
15 to 35 °C
Storage Temperature Range
- 20 to 70 °C
Vibration
Meets MIL-T-28800D
Weight
With Hi Q-RPT or utility sensor only: 30 kg (66 lb)
With Hi Q-RPT or utility sensor and Lo Q-RPT: 33 kg (73 lb)
Enclosure: add 10 kg (22 lb)
Dimensions
Without optional enclosure: 26 cm H x 44 cm W x 55 cm D
(10.2 in. x 17.3 in. x 21.7 in.) Front panel is 19” wide X 6U high with mounting
holes for standard 19 in. rack mount systems
With optional enclosure: 30 cm H x 52 cm W x 55 cm D
(11.8 in. x 20.5 in. x 21.7 in.)
Ventilation
To prevent product overheating, provide proper ventilation. Allow 10 cm
(4 in.) clearance from rear panel cooling fan.
Communication Ports
Fuses
RS232 (COM1), RS232 (COM2), IEEE-488.2
Fuses 1 A, 250 VAC fuse, 5 x 20 mm, time lag type fuse
Internal power supply fuse not replaceable by operator: 2A, 250 V (UV 440-2
power supply), 3.15A, 250 V (NFS40-7612 power supply)
