|Calibration||:||Pressure & Vacuum|
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||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%|