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 4765
East Beautiful Lane Phoenix Arizona 85044-5318 USA.
DH Instruments makes sincere efforts to ensure the 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, PG7000, PG7102, PG7202, PG7302, PG7601, CalTool and COMPASS are trademarks, registered and
otherwise, of DH Instruments, a Fluke Company.
Swagelok is a registered trademark of the Swagelok Company.
Krytox is a registered trademark of the Dupont de Nemours Company.
Products described in this manual are manufactured under international patents and one or more of the following U.S.
patents: 6,701,791, 5,142,483, 5,257,640, 5,331,838, 5,445,035. Other U.S. and international patents pending.
1.2.3 MASS SETS...................................................................................................................................................8
2.1.1.2 MASS SET...............................................................................................................................................13
2.1.2.2 MASS SET...............................................................................................................................................19
2.3.1 PREPARING FOR OPERATION.................................................................................................................23
2.3.1.1 SETTING UP THE PLATFORM...............................................................................................................23
2.3.1.2 SYSTEM PRESSURE INTERCONNECTIONS .......................................................................................24
2.3.1.3 SETTING UP A MASS SET.....................................................................................................................24
2.3.2 INSTALLING A PISTON-CYLINDER MODULE INTO THE PLATFORM....................................................25
2.3.3 SWITCHING A PG7202 BETWEEN GAS OPERATION AND OIL OPERATION .......................................27
2.4 POWER UP AND VERIFICATION .........................................................................................................28
2.4.1 POWER UP..................................................................................................................................................28
2.4.2 CHECK THAT ON-BOARD PISTON-CYLINDER MODULE AND MASS SET INFORMATION ARE
3.9.11 [ENTER/SET P] FROM RUN SCREEN.......................................................................................................85
3.9.11.1 [ENTER/SET P] IN PRESSURE TO MASS MODE .................................................................................86
3.9.11.2 [ENTER/SET P] IN MASS TO PRESSURE MODE .................................................................................88
3.9.11.3 C O M M A N D S F O R Z E R O P R E S S U R E , E N D I N G A T E S T .....................................................89
3.9.12 [P OR M]......................................................................................................................................................89
3.9.13 [ ] AND [], [←]....................................................................................................................................90
3.11.1.5 SELECT THE ACTIVE PISTON-CYLINDER MODULE .........................................................................102
3.11.1.6 ADD MASS SET.....................................................................................................................................103
3.11.1.7 EDIT MASS SET....................................................................................................................................107
3.11.1.8 VIEW MASS SET...................................................................................................................................107
3.11.1.9 DELETE MASS SET ..............................................................................................................................108
3.11.1.10 SELECT MASS SET..............................................................................................................................108
3.11.1.11 ADD MASS LOADING BELL..................................................................................................................109
3.11.1.12 EDIT MASS LOADING BELL.................................................................................................................110
3.11.1.13 VIEW MASS LOADING BELL................................................................................................................110
3.11.1.14 DELETE MASS LOADING BELL...........................................................................................................110
3.11.1.15 SELECT MASS LOADING BELL...........................................................................................................111
3.11.5.3 RS232 SELF TEST ................................................................................................................................120
4.2.1.2 COM2 AND COM3.................................................................................................................................132
5.4 MASS SETS.........................................................................................................................................198
This manual provides the user with the information necessary to operate various PG7000 Piston Gauges.
It also includes a great deal of additional information provided to help you optimize PG7000 use and take
full advantage of its many features and functions.
This manual covers four PG7000 models: PG7102, PG7202, PG7302 and PG7601. The four models
have many features and characteristics in common as well as individual differences. When discussing
features that are common to all four models, they are referred to collectively as PG7000. When providing
information pertaining to a specific model, that model is referred to by its specific model number.
Before using the manual, take a moment to familiarize yourself with the Table of Contents structure.
All first time PG7000 users should read Sections 1 and 2. Section 3 provides a comprehensive
description of general PG7000 operating principles. Section 4 covers remote communication with an
external computer. Section 5 provides maintenance and calibration information. Section 6 is a quick
troubleshooting guide. Use the information in Section 6 to troubleshoot unexpected PG7000 behavior
based on the symptoms of that behavior.
Certain words and expressions have specific meaning as they pertain to PG7000s. The Glossary
(see Section 7) is useful as a quick reference for the definition of specific words and expressions as they
are used in this manual.
FOR THOSE OF YOU WHO “DON’T READ MANUALS”, GO DIRECTLY TO SECTION 2.3 TO SET UP
YOUR PG7000. THEN GO TO SECTION 2.4. THIS WILL GET YOU RUNNING QUICKLY WITH MINIMAL RISK OF
CAUSING DAMAGE TO YOURSELF OR YOUR PG7000. THEN… WHEN YOU HAVE QUESTIONS OR START TO
WONDER ABOUT ALL THE GREAT FEATURES YOU MIGHT BE MISSING, GET INTO THE MANUAL!
T
T
HHIISS
M
AANNUUAAL
M
L
Manual Conventions
(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 explanations.
[ ] indicates direct function keys (e.g., [RANGE]).
PG7000 Piston Gauges are reference level pressure standards that operate on the piston
gauge principle. Pressure is defined by balancing it against the force exerted by a known mass
accelerated by gravity on the effective area of a piston-cylinder.
A PG7000 piston gauge consists of the PG7000 Platform, one or several piston-cylinder modules, a mass
set. An automated mass handling system is available. A PG7000 system normally also includes the
means to generate and adjust pressures and to interconnect the system components and a device being
calibrated or tested. The pressure generation component can be manual or automated. COMPASS
Pressure software may also be included to assist in executing test sequences, acquiring test data and
producing test reports.
There are four PG7000 Platforms: PG7102, PG7202, PG7302 and PG7601. These have a common
PG7000 presentation and features. They are distinguished by their normal operating medium (oil and/or
gas) and the capability to define pressures relative to a vacuum reference.
®
for
•PG7102 - Gas operated with gas lubricated piston-cylinder modules (PC-7100/7600 modules)
- Maximum pressure is 11 MPa (1 600 psi)
- Does not support definition of pressure against a vacuum reference
•PG7202 - Gas operated, liquid lubricated piston-cylinder modules (PC-7200 modules)
- Maximum pressure is 110 MPa (16 000 psi) when operated with a PC-7200 module
- Maximum pressure is 200 MPa (30 000 psi) when operated with a PC-7300 module
- Does not support definition of pressure against a vacuum reference
•PG7302 - Oil operated (PC-7300 modules)
- Maximum pressure is 500 MPa (72 500 psi)
•PG7601 - Gas operated, gas lubricated piston-cylinder modules (PC-7100/7600 modules)
- Maximum pressure is 7 MPa (1 000 psi)
- Supports definition of pressure against a vacuum reference
PG7000 platforms, piston-cylinder modules, mass sets and mass handling systems are designed to
maximize metrological performance and ease of operation. They include many features that enhance the
fundamental precision and stability of pressure measurements as well as simplifying use and reducing
operator influence on the measurements. Extensive monitoring and controlling capability and advanced
local and remote user interfaces are integrated into PG7000 Platforms.
Operator interaction with PG7000 and its extensive capabilities and peripherals is accomplished through
a single display and keypad on the PG Terminal or from a computer via a single standard RS232 or
IEEE-488 interface.
100 kg, while not exceeding 11 MPa (1 600 psi)
100 kg, while not exceeding 110 MPa (16 000 psi) when operated
with PC-7200 piston-cylinder modules or 200 MPa (30 000 psi) when
operated with PC-7300 piston-cylinder modules
100 kg
38 kg
Test port: DH200
Test port: DH500
Drain port: DH500
Test port: DH500
Test port: DH200
Bell Jar Vent Port: DH200
Vacuum Reference
Pump Down Port: KF25 (KF40 available on optional AMH
automated mass handler)
External Vacuum Port: Optional KF25 on bell jar (KF40 available
on optional AMH automated mass handler)
DH200 and DH500 are gland and collar type fittings for
1/4 in. (6.35 mm) coned and left hand threaded tubes.
DH200 is equivalent to AE SF250C, HIP LF4, etc.
DH500 is equivalent to AE F250C, HIP HF4, etc.
Available, must be specified.
1.2.1.1 EMBEDDED FEATURES
• Local control with 2 x 20 vacuum fluorescent display and 4 x 4 function
driven keypad.
• Real time (1 second update rate) display and measurement of ambient
(pressure, temperature, humidity) and instrument (piston-cylinder
temperature, piston position, piston drop rate, piston rotation rate, piston
rotation decay rate, reference vacuum) conditions.
• Real time (1 second update rate) mass-to-pressure and pressure-to-mass
calculations taking into consideration all environmental and operational
variables.
• Full gas and liquid fluid head corrections including DUT head correction and
piston position head correction.
• Adjustable mass loading resolution (0.01 g to 0.1 kg).
• Audible prompts of instrument status (piston movement, Ready/Not Ready indication)
with override capability.
• Integrated automated mass handling option (AMH-38 or AMH-100).
• Interfacing and automatic exploitation of external barometer via RS232.
• Interfacing and automatic exploitation of any external vacuum gauge via
RS232 (PG7601 only).
• Automated differential mode to define low differential pressures at various
static pressures between vacuum and two atmospheres.
• Automated high line differential mode to define differential pressure at high
line pressure.
Gas operated, liquid lubricated piston-cylinder module characteristics. Used in
PG7202 platform.
Though not recommended for day-to-day operation, PC-7200 modules can
also be filled completely with oil and operated with oil as the test medium
(see Section 2.3.3).
PC-7200-100
Operation
Lubricating Liquid
Piston and Cylinder Material
Nominal Diameter
Nominal Area
Mounting System
PC-7200-200
Operation
Lubricating Liquid
Piston and Cylinder Material
Nominal Diameter
Nominal Area
Mounting System
PC-7200-500
Operation
Lubricating Liquid
Piston and Cylinder Material
Nominal Diameter
Nominal Area
Mounting System
PC-7200-1
Operation
Lubricating Liquid
Piston and Cylinder Material
Nominal Diameter
Nominal Area
Mounting System
PC-7200-2
Operation
Lubricating Liquid
Piston and Cylinder Material
Nominal Diameter
Nominal Area
Mounting System
Gas operated, liquid lubricated
Synturion 6 (Krytox
®
optional)
Tungsten carbide
11.2 mm
98.1 mm
2
Negative free deformation
Gas operated, liquid lubricated
Synturion 6 (Krytox
®
optional)
Tungsten carbide
7.9 mm
49.0 mm
2
Negative free deformation
Gas operated, liquid lubricated
Di-2-ethylhexyl Sebacate (Krytox
Tungsten carbide
5.0 mm
19.6 mm
2
Negative free deformation
Gas operated, liquid lubricated
Di-2-ethylhexyl Sebacate (Krytox
Tungsten carbide
3.5 mm
2
9.8 mm
Negative free deformation
Gas operated, liquid lubricated
Di-2-ethylhexyl Sebacate (Krytox
Tungsten carbide
304L non-magnetic stainless steel
Electropolished
± 20 ppm of nominal value (manual mass sets, AMH
automated mass handler mass sets do not have fixed
adjustment tolerances)
Uncertainty of Measured Values
Masses < 50g
± 5 ppm or 1 mg, whichever is greater
± 1 mg
Masses designated “tare” are delivered without reported measured values and are intended
only for use on the “tare” PG7000 in high line differential pressure measurement mode.
1.2.4 PRESSURE MEASUREMENTS
1.2.4.1 PC-7100/7600
For uncertainty in piston-cylinder effective area and typical measurement
uncertainty in pressure defined by the piston gauge, see the piston-cylinder
calibration report and current revision of DHI Technical Note 7920TN01.
All masses are delivered in molded, reusable, transit cases with custom inserts.
PC-7100/7600-10
PC-7100/7600-10-L
Sensitivity
Reproducibility
Typical Drop Rate (35 kg)
PC-7100/7600-20
Sensitivity
Reproducibility
Typical Drop Rate (35 kg)
PC-7100/7600-50
Sensitivity
Reproducibility
Typical Drop Rate (35 kg)
PC-7100/7600-100
Sensitivity
Reproducibility
Typical Drop Rate (35 kg)
PC-7100/7600-200
Sensitivity
Reproducibility
Typical Drop Rate (35 kg)
1 Sensitivity: The smallest variation in input detectable in output.
2 Reproducibility: Combined long term stability of piston-cylinder effective area and masses.
Piston-cylinder modules designated “tare” are delivered without reported
values and are intended only for use on the “tare” PG7000 in high line differential
pressure measurement mode.
1.2.4.2 PC-7200
For uncertainty in piston-cylinder effective area and typical measurement
uncertainty in pressure defined by the piston gauge, see the piston-cylinder
calibration report and current revision of DHI Technical Note 7920TN01.
PC-7200-100
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
1
2 Pa + 1 ppm
2
± 5 ppm
0.10 mm/min
PC-7200-200
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
PC-7200-500
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
PC-7200-1
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
PC-7200-2
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
1 Sensitivity: The smallest variation in input detectable in output.
2 Reproducibility: Combined long term stability of piston-cylinder effective area and masses.
For uncertainty in piston-cylinder effective area and typical measurement
uncertainty in pressure defined by the piston gauge, see the piston-cylinder
calibration report and current revision of DHI Technical Note 7920TN01.
PC-7300-100
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
1
2 Pa + 1 ppm
2
± 5 ppm
0.02 mm/min
PC-7300-200
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
PC-7300-500
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
PC-7300-1
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
PC-7300-2
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
PC-7300-5
Sensitivity
Reproducibility
Typical Drop Rate (50 kg)
1 Sensitivity: The smallest variation in input detectable in output.
2 Reproducibility: Combined long term stability of piston-cylinder effective area and masses.