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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).
UKAS Pressure Uncertainties
|
Measured Quantity |
Best 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% | |