Fluke 721-3601 - Precision Pressure Calibrator
Pressure calibration and temperature measurement for custody transfer applications
The ideal tool for gas custody transfer applications is the Fluke 721 Precision Pressure Calibrator. With dual isolated pressure sensors, it allows you to take simultaneous static and differential pressure measurements with a single tool.
The 721 can be configured by selecting either a 16 psi (1.1 bar) or 36 psi (2.48 bar) low pressure sensor then add any of 7 high pressure ranges including 100, 300, 500, 1000, 1500, 3000 or 5000 psi (6.9, 20, 24.5, 69, 103.4, 200, 345 bar).
- Ideal for gas flow calibration (custody transfer) applications
- Two isolated, stainless steel, pressure sensors with 0.025% accuracy
- Pt100 RTD input for temperature measurement, (probe optional)
- Measures 4 to 20 mA signals
- Internal 24 V loop power supply can power a transmitter under test
- Measure up to 30 V DC, check 24 V loop power supplies
- Extend pressure measurement range with connection to external 700 series pressure modules (29 ranges)
- Large backlit graphic display can display up to three inputs simultaneously
- Store five instrument setups for recall and use
Low Pressure Sensor Specifications
| Range | -14 psi to +36 psi, -0.97 bar to 2.48 bar |
| Resolution | 0.001 psi, 0.0001 bar |
| Accuracy | 0.025% of full scale |
High Pressure Sensor Specifications
| Range | -12 to +100 psi, -0.83 bar to 6.9 bar |
| Resolution | .01 psi, 0.0001 bar |
| Accuracy | 0.025% of full scale |
General Specifications
| Instrument setup recall | Last used on power-up |
| Environmental | Operating temperature -10°C to +50°C Storage temperature (without batteries) -20°C to +60°C |
| Altitude | 2,000 m |
| Ingress protection | IP-40 |
| Power Requirements | 6.0 V DC |
| Battery life | >35 hours, typical usage |
| Batteries required | (4) Standard AA cells |
| Dimensions (H x W x D) | 7.9 x 4.3 x 2.3 in (20 x 11 x 5.8 cm) |
| Weight | 03539 kg (1 lb 3 oz) |
| Connectors/ports pressure | Two, 1/8 in NPT, 700P Series Pressure Module; RTD Probe |
Electrical and Temperature Measurement 1-Year
| mA measure | |||
| Range | 0 to 24 mA | ||
| Resolution | 0.001 mA | ||
| Accuracy | ±0.015% of rdg ±0.002mA |
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| V DC measure | |||
| Range | 0 to 30 V DC | ||
| Resolution | 0.001 V | ||
| Accuracy | ±0.015% of rdg ±0.002 V |
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| Temperature measure (RTD/ Ohms)1 |
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| Range | -40°C to 150°C (-40°F to 302°F) |
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| Resolution | 0.01°C, 0.01°F | ||
| Accuracy | ±0.015% of rdg ±0.02 ohms ±0.1°C (±0.2°F) ±0.25°C (±0.45°F) combined uncertainty when using 720 RTD probe accessory |
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| Loop power supply | |||
| Range | 24 V | ||
| Resolution | N/A | ||
| Accuracy | 24 mA @ 24 V | ||
1. Temperature measurement requires optional Fluke-720RTD probe available as an accessory
Temperature Effect
- No effect on accuracy on all functions from 15°C to 35°C
- Add ±0.002% F.S./°C for temps outside of 15°C to 35°C
Available Pressure Engineering Units
psi, bar, mbar, kPa, kgcm2, cmH2O @ 4°C, cmH2O @ 20°C, mH2O @ 4°C, mH2O @ 20°C, inH2O @ 4°C, inH2O @ 20°C, inH2O @ 60°F, mmHg @ 0°C, inHg @ 0°C, ftH2O @ 4°C, ftH2O @ 20°C, ftH2O @ 60°F
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