| Calibration | : | Pressure & Vacuum |
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The pressure laboratory is equipped with a 0.008% air dead weight tester with a range from -1 to 25bar and a 0.008% hydraulic dead weight tester with a range of 0 to 700bar with an oil/water converter. This equipment gives us the ability to calibrate a wide range of precision pressure transducers, transmitters, digital and analogue pressure gauges, vacuum gauges, barometers and multifunction pressure calibrators to a best uncertainty of 0.008%. We also have a 0.04% pressure calibration system with a range of 0.95 to 200bar with oxygen free nitrogen. Calibration of low pressure measuring instruments is achieved using a Furness PPC500 which covers pressure between the ranges of 200microbar to 20 mbar with uncertainities of (0.11% +0.3microbar). |
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UKAS Pressure Uncertainties
| Measured Quantity | Calibration & Measurement Capability |
| Gas Pressure (Gauge) | |
| -100 kPa to -10 kPa | 0.010% |
| -10 kPa to -3.5 kPa | 0.020% |
| -3.5 kPa to -1.5kPa | 0.020% + 1.5 Pa |
| -1.5 kPa to 0 kPa | 0.050% + 82 Pa |
| 0 kPa to 1.5 kPa | 0.050% + 42 Pa |
| 1.5 kPa to 3.5 kPa | 0.020% + 1.5 Pa |
| 3.5 kPa to 2.5 MPa | 0.0080% |
| 2.5 MPa to 6 MPa | 0.050% + 2.7 kPa |
| 6 MPa to 25 MPa | 0.050% + 13 kPa |
| Hydraulic Pressure (Gauge) | |
| 0 to 600 kPa | 0.050% + 810 Pa |
| 600 kPa to 6 MPa | 0.010% |
| 6 MPa to 70 MPa | 0.010% |
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