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| 2465A - Gas Piston Gauge |
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The Model 2465 Gas Piston Gauge has a long history of serving national standard laboratories, commercial industry and government organizations as a gas piston gauge standard for over 40 years.
Since its original introduction, enhancements have been made to increase performance and reduce operator workload. Now, Fluke Calibration offers the next step in the development of the Model 2465. With a new autofloat controller, operator intervention is reduced to simply applying the mass load, while still providing the highest level of performance available in a gas piston gauge: 0.0010% of reading for pressures to 100 psi (7 bar), 0.0027% of Reading to 1000 psi (70 bar). Time-proven materials, hand craftsmanship, and a lineage of intercomparisons to national standards laboratories at the highest levels are coupled with new technology to make the Model 2465 Gas Piston Gauge the world’s choice for a gas pressure standard.
- -Pressure ranges from 0-1000 psig, 0.2-1000 psia
- -New autofloat option
- -Accuracy to 0.0010% (10 ppm) of reading for pressures to 100 psi (7 bar)
- -Accuracy to 0.0027% (27 ppm) of reading for pressures >100 psi to 1000 psi (70 bar)
- -Precision better than 3 ppm
- -Stability better than 3 ppm per year
- -Resolution 0.0001% (1 ppm) or 1 mg
- -Gauge, absolute, vacuum and low pressure modes
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General |
| Pressure range |
Gauge mode: 0.2–1000 psig (14 mbar to 70 bar)
Absolute mode: 0.2–1000 psia (14 mbara to 70 bara)
Vacuum mode: -14.5 to 0 psig (-1000 to 0 mbar) (Vacuum pressure achieved depends on local barometric pressure) |
| Electrical power |
115/230 VAC, 50/60 Hz, 15 W |
| Temperature |
Operating temperature 15 to 28°C (60 to 82°F)
Storage temperature -20 to 70°C (-4 to 158°F) |
| Humidity |
Operating humidity 20–75% relative humidity, noncondensing; storage humidity 0–90% |
| Pressure medium |
High purity nitrogen or dry, clean air with less than 0.5 ppm hydrocarbon and less than 5 ppm H2O content, dew point less than or equal to -50 °C, and less than 50 micron particulate size. Although lower quality gas can be used, the frequency of piston/cylinder cleaning will increase. |
Performance |
| Precision (type A uncertainty) |
Better than 3 ppm
Values are reported at the 95% confidence level (2σ) |
| Long-term stability |
Better than 1.5 ppm per two years
Values are reported at the 95% confidence level (2σ) |
| Resolutionc |
1 ppm or 1 mg |
Piston/Cylinder Assemblies |
| Low Range |
Nominal area: 0.52 in2 (3.4 cm2)
Pressure range: 0.2–25 psi (14 mbar to 1.7 bar)
Minimum autofloat pressure: 1 psi (70 mbar)
Total uncertainty: 0.001% RDG or 0.00001 psi (threshold pressure 1 psi)c
Materials: Piston is 440C stainless steel, cylinder is cemented tungsten carbide
Thermal coefficient: 1.5E-05/°C |
| Lower Mid Range |
Nominal area: 0.13 in2 (0.84 cm2)
Pressure range: 1.7–100 psi (117 mbar to 7 bar)
Minimum autofloat pressure: 5 psi (350 mbar)
Total uncertainty: 0.001% RDG or 0.00004 psi (threshold pressure 4 psi)c
Materials: Piston and cylinder are cemented tungsten carbide
Thermal coefficient: 9.1E-06/°C |
| Upper Mid Range |
Nominal area: 0.026 in2 (0.168 cm2)
Pressure range: 2–500 psi (0.14 to 35 bar)
Minimum autofloat pressure: 20 psi (1.4 bar)
Total uncertainty: 0.0026% RDG or 0.0004 psi (threshold pressure 16 psi)c
Materials: Piston and cylinder are cemented tungsten carbide
Thermal coefficient: 9.1E-06/°C |
| High Range |
Nominal area: 0.013 in2 (0.084 cm2)
Pressure range: 2–1000 psi (0.14 to 70 bar)
Minimum autofloat pressure: 35 psi (2.4 bar)
Total uncertainty: 0.0026% RDG or 0.0004 psi (threshold pressure 16 psi)c
Materials: Piston and cylinder are cemented tungsten carbide
Thermal coefficient: 9.1E-06/°C |
Mass Set |
| Total mass |
13.2 lb (6 kg) |
| Maximum platter mass: |
2.2 lb (1 kg) |
Autofloat System |
| Autofloat controller |
Positive shut-off controller automatically generates pressure and maintains piston float position at desired pressure.
Includes WinPrompt software. |
| Autofloat range |
Low range piston/cylinder: 1–25 psi (70 mbar to 1.7 bar)
Lower mid range piston/cylinder: 5–100 psi (350 mbar to 7 bar)
Upper mid range piston/cylinder: 20–500 psi (1.4 to 35 bar)
High range piston/cylinder: 35–1000 psi (2.4–70 bar) |
| Float positiond |
Inductive sensor
Float position resolution: 0.001 inch (0.002 cm) Sink rate resolution: 0.001 inch/minute (0.001 cm/min) |
| Piston temperatured |
4-wire 100Ω PRT
Accuracy: ±0.1 °C
Resolution: 0.01 °C |
| Laboratory Environment Monitor (LEM) |
Sensor types
Temperature: Thin film platinum 1000Ω RTD
Humidity: Capacitive IC humidity sensor
Barometric pressure: Piezoresistive, monolithic silicon pressure transducer
Accuracy
Temperature: ±2 °C
Humidity: ±15%
Pressure: ±5 mmHg |
| Vacuum module |
Thermopile sensor
Accuracy: 10% of reading or 10 mTorrc, whichever is greater
Resolution: 1 mTorr |
| Barometric reference sensor |
Accuracy: Better than ±0.002 psi (0.14 mbar) per year
Accuracy in low gauge mode: ±0.0004 psi (0.03 mbar)
Resolution: 0.00015 psi (0.01 mbar) |
Computer Interface |
| Requirements |
Pentium level processor, RS-232C interface, monitor, mouse or other pointing device, keyboard; program requires 2MB available hard disk space; Windows 95 or higher |
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