Automated primary pressure reference for absolute and gauge pressures to 500 kPa

The PG9607 is the next generation of absolute pressure piston gauge from Fluke Calibration. It supports the use of a 100 kg mass set to define gauge and absolute pressures from 11 to 500 kPa with a single piston-cylinder.

This piston gauge is designed for use as a true primary pressure reference in metrology and research institutes. Its performance is centered around a 50 mm piston-cylinder assembly with dimensional characteristics suitable for low-uncertainty dimensional traceability. The piston mounting post allows controlled clearance operation and reduced uncertainty on piston-cylinder temperature measurement. The new platform architecture promotes improved temperature stability around the piston-cylinder.

PG9607 features AMH automated mass handling technology to allow fully automated testing in both gauge and absolute mode. Manual steps are removed from its operation, saving time and delivering metrological advantages. When AMH is coupled with automatic pressure control and computer software, repeated and extended tests become practical, making PG9607 a powerful calibration and research tool.

PG9607 is the result of Fluke Calibration's extensive work with national metrology institutes (NMIs) to minimize pressure measurement uncertainty and years of supplying PG7000 piston gauges to NMIs and other top pressure metrology labs worldwide.

 

 

Refined 50 mm piston-cylinder design

PG9607’s piston-cylinder assembly builds upon more than 15 years of design, manufacture and calibration of 50 mm piston-cylinders. PC-9607-5 is a 5 kPa/kg piston-cylinder with a stationary piston and floating cylinder design. Improved manufacturing and testing methods are used to produce a very low distortion assembly. The 50 mm piston-cylinder provides exceptional performance up to 500 kPa with a 100 kg mass load. The PG9607 mounting post allows an independent controlled clearance pressure to be applied to the inside of the piston, thus predictably varying the size of the gap between the piston and cylinder for advanced study

Innovations to minimize uncertainty

Two decades ago, DH Instruments PG7000 family of piston gauges introduced the advantages of on-board sensing and monitoring technology, as well as other performance and ergonomic enhancements. The PG9000 platform adds several innovations to improve pressure measurements even further.

The platform consists of a PG terminal, a piston gauge base and a new remote electronics module. The terminal is the user interface. It stores metrological component data, reports operating and ambient condition status and calculates pressure.

The PG9000 piston gauge base supports automatic piston-cylinder rotation and mass handling, but all of the electronics to support the sensors and rotation control have been relocated to a remote electronics module. This architecture supports the best possible temperature stability at the base, even with prolonged vacuum operation, since any significant sources of heat are located away from the base.

The PG9607 mounting post has two integrated PRTs for reduced piston-cylinder temperature uncertainty. The PRTs are easily removed for calibration. A capacitance diaphragm gauge is included in the optional vacuum reference hardware for making residual vacuum measurements in absolute mode. PG9607 can also integrate the measurement output from virtually any user-supplied vacuum sensor.

Metrology supported by automation

AMH automated mass handling technology is expanded on PG9607 to provide gauge and absolute operation with up to a 100 kg mass load. Eliminating manual mass loading minimizes mechanical wear, improving mass stability. The automated mass handler operates inside the evacuated bell jar, so the time to release and draw a vacuum while changing masses between test points is eliminated. The sustained vacuum produces lower and more static residual vacuum values. Total test time and productivity are greatly improved, especially on absolute pressure tests. More importantly, full automation promotes highly consistent measurements and allows extensive tests with many test points that would be impractical to perform manually. And with the help of calibration management software like COMPASS® for Pressure, tests can be run fully unattended.

 

General specifications

Electrical power 85/264 V ac, 50/60 Hz, 22 VA maximum consumption
Temperature Operating: 15 °C to 35 °C (59 °F to 95 °F)
Storage: -20 °C to 70 °C (-4 °F to 158 °F)
Humidity Operating: 5 % to 95 % RH, non-condensing
Weight Instrument platform with no mass or piston-cylinder loaded
PG9607 (without vacuum hardware): 34 kg (74 lb)
Remote electronics module: 1.9 kg (4 lb)
PG terminal: 1.4 kg (3 lb)
Optional vacuum reference hardware: 16 kg (36 lb)
Dimensions (H x W x D) PG9607 base (without vacuum hardware):
34.1 cm x 54.3 cm x 52.3 cm (13.4 in x 21.4 in x 20.6 in)
(Height: top of piston-cylinder assembly)

PG9607 base (with optional vacuum bell jar and vacuum gauge connected):
56 cm x 54.3 cm x 52.3 cm (22 in x 21.4 in x 20.6 in)
(Height: Top of bell jar)

Remote electronics module: 10.2 cm x 35.1 cm x 19.6 cm (4 in x 13.8 in x 7.7 in)

PG terminal: 12 cm x 15 cm x 20 cm (4.7 in x 5.9 in x 7.9 in)

Microprocessors Instrument platform: Motorola 68302
PG terminal: Hitachi 64180
Communication ports RS-232
COM 1: Host computer
COM2: Residual vacuum sensor (external)
COM3: Automated pressure controller COM4: Unused/spare
IEEE-488 Host computer 
Overall pressure range Gauge: 11 kPa to 500 kPa, 0.11 bar to 5 bar, (1.6 to 72.5 psi)1
Absolute: 11 kPa to 500 kPa, 0.11 bar to 5 bar, (1.6 to 72.5 psi)1
Operating media Gas: nitrogen, helium, dry air (dewpoint ≤ -40 ºC)
Maximum mass load 100 kg1
Pressure connections PG 9607 base
Test port: DH200*
Controlled clearance pressure: DH200*
* Gland and collar fitting for 6.35 mm (0.25 in) coned and left hand threaded tubes. Equivalent to AE SF250C, HIP LF4, etc.

AMH drive
Quick connector equivalent to Swagelok QM Series (QM2-B-200). Use with DESO (double end shut off) type stem.

AMH vent
Quick connector equivalent to Swagelok QM Series (QM2-B-200). Use with SESO (single end shut off) type stem only.

Remote electronics module
ATM port: 10-32 UNF

Vacuum bell jar 3x 40 mm ISO/KF flange, 1x 50 mm ISO/KF flange (top)

CE conformance
All PG9000 models conform to CE requirements

1 MS-AMH-100 mass set contains approximately 104.5 kg of mass. Combined with the piston or cylinder and bell assembly, total mass loads may be up to 106 kg, resulting in pressures of up to 530 kPa (5.3 bar, 76.9 psi).

AMH-100-VAC Automated Mass Handler (optional)

Power requirements 15 V dc @ 2 A, 30 W max. consumption
Temperature Operating: 15 ºC to 35 ºC (59 °F to 95 °F)
Dimensions (H x W x D) 41 cm x 41 cm x 36 cm (16.3 in x 16.1 in x 14.1 in)
Weight 12 kg (25 lbs)
Power/communications Custom 8-pin connector
AMH drive air supply 550 kPa (80 psi), ± 10 %, minimal flow
AMH vacuum supply At least 50 kPa (7.5 pi) under atmosphere, minimal flow
Pressure connections Pressure: Quick connector DESO (double end shut off) type stem
Vacuum: Quick connector SESO (single end shut off) type stem

Piston-cylinder assembly (PC-9607-5)

The piston is mounted in a fixed position on the mounting post. The cylinder floats and is rotated.
Piston material Tungsten carbide
Cylinder material Tungsten carbide
Nominal diameter 50 mm (1.97 in)
Nominal area 2000 mm2
Mounting system Free deformation with controlled clearance pressure (CCP) available on inside of piston.
Typical drop rate (Full mass load) < 0.25 mm/min (0.009 in/min) at 500 kPa

Mass sets

All masses are delivered in molded, reusable, transit cases with custom inserts.
Masses Material: 304L non-magnetic stainless steel

Finish: Electropolished

Adjustment tolerance: ± 20 ppm of nominal value
(manual mass sets, AMH automated mass handler mass sets do not have fixed adjustment tolerances)

Uncertainty of measured values: ± 5 ppm or 1 mg, whichever is greater

Uncertainty of measured values: ± 1 mg

Pressure measurements

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 Technical Note 0180TN12 Typical Pressure Measurement Uncertainty Defined by a PG9607 or PG9602 Piston Gauge.
Sensitivity1 0.005 Pa + 0.5 ppm
Reproducibility2 ± 2 ppm + 0.05 Pa

1 Sensitivity: The smallest variation in input detectable in output.
2 Reproducibility: The root sum square of the stability of effective area and stability of the AMH-100 mass set for 1 year.

Ambient and instrument condition measurements

Temperature (Ambient) Range: 0 °C to 40 °C (32 °F to 104 °F)
Resolution: 0.1 °C (32.18 °F)
Measurement uncertainty: ± 1 °C (33.8 °F)
Temperature (Piston-cylinder module) Range: 0 °C to 40 °C (32 °F to 104 °F)
Resolution: 0.01 °C (32.02)
Measurement uncertainty: ± 0.1 °C (32.18 °F)
Barometric pressure with internal sensor Range: 70 kPa to 110 kPa
Resolution: 10 Pa Measurement uncertainty: ± 140 Pa

Barometric pressure can also be read automatically with any RS-232 device such as a DHI RPM.

Relative humidity Range: 5 % to 95 % RH
Resolution: 1 % RH
Measurement uncertainty: ± 10 % RH
Piston position Range: ± 4.5 mm
Resolution: 0.1 mm
Piston rotation (Rate and deceleration) Range: 2 rpm to 99 rpm Resolution: 1 rpm
Vacuum (optional) Range: 0 Pa to 13 Pa
Resolution: 0.01 Pa
Measurement uncertainty: ± 0.05 Pa + 0.5 % of reading

 

 

Model Name Description
PG9607 Platform

Gas operated piston gauge

  • Includes base, terminal, remote electronics module, and basic pneumatic interconnections to pressure controller and UUT.
  • All platforms are CE compliant and vacuum-capable, but vacuum reference hardware is not included.
  • Delivered with reusable shipping cases for all components that require calibration certificates

PG9600-VAC-REF optional Vacuum Reference Hardware

Hardware required for absolute pressure measurements.
Consists of:

  • Stainless steel vacuum chamber (bell jar) assembly including vent valve and accessories
  • Vacuum measure kit with CDG, manual valve and interconnections, interface and accessories.

Delivered with reusable shipping case and calibration certificate for CDG. Vacuum pump and interconnections to bell jar assembly supplied separately.

PC-9607-5 Piston-Cylinder Module

Gas operated assembly

  • Delivered with reusable shipping and storage case and calibration certificate
  • Pressure to mass ratio: 5 kPa/kg
  • Minimum pressure (using mass bell)
    (absolute and gauge): 11 kPa (0.11 bar, 1.6 psi)
  • Maximum pressure (100 kg mass)
    (absolute and gauge): 500 kPa (5 bar, 72.5 psi)

PC-9607-5 piston-cylinder is compatible with PG7607 piston gauge bases. Legacy PC-7607-5 piston-cylinders are also usable up to 190 kPa (1.9 bar, 27.5 psi) with the PG9607 base.

MS-7001-35

Mass Set (for manual operation without AMH)
Nominal total mass: 35 kg

MS-7002-35

Mass Set (for manual operation without AMH)
Nominal total mass: 35 kg

MS-7002-40

Mass Set (for manual operation without AMH)
Nominal total mass: 40 kg

MS-7002-45

Mass Set (for manual operation without AMH)
Nominal total mass: 45 kg

MS-7002-55

Mass Set (for manual operation without AMH)
Nominal total mass: 55 kg

MS-7002-80

Mass Set (for manual operation without AMH)
Nominal total mass: 80 kg

MS-7002-100

Mass Set (for manual operation without AMH)
Nominal total mass: 100 kg

Manual 100 kg mass set is typically used when AMH is not purchased. Smaller mass sets are available when maximum pressure range is not required.

Delivered with reusable shipping and storage cases and calibration certificate.

Existing MS-7001/7002 mass sets from PG7000 piston gauge systems are compatible with PG9607

AMH-100-VAC

Automated Mass Handler
AMH is recommended, but not required for PG9607 operation. Select AMH or manual mass set depending on whether AMH-100-VAC is selected.

Note that AMH-100 (gauge pressure model) is not compatible with PG9607 without modification.

MS-AMH-100

Mass Set (for automatic operation with AMH)

Nominal total mass: 100 kg

Mass set includes AMH mass carrying bell. Delivered with reusable mass shipping and storage cases and calibration certificate.

MS-AMH-60

Mass Set (for automatic operation with AMH)

Nominal total mass: 60 kg

Mass set includes AMH mass carrying bell. Delivered with reusable mass shipping and storage cases and calibration certificate.

Mass sets smaller than 100 kg are available if the maximum pressure range is not required.

MS-AMH-90

Mass Set (for automatic operation with AMH)

Nominal total mass: 90 kg

Mass set includes AMH mass carrying bell. Delivered with reusable mass shipping and storage cases and calibration certificate.

Mass sets smaller than 100 kg are available if the maximum pressure range is not required.

MB-7002-0.8

Mass Bell

Mass bell must be purchased to use manual mass sets with PG9000 . Mass bell is not included with the PG9000 platform or manual mass sets.

Accessories common to all models:

Accessory Description
Automated Mass Handling

See AMH-100 and AMH mass sets for automated mass handling options.

MPC1-1000

Manually operated gas pressure controller, pressure range vacuum to 7 MPa (1,000 psi)

COMPASS

Calibration Assistance Software

PPC4 A700Ku

Automatic Pressure Control to 700 kPa (100 psi)