Intervention Rental's new In-house flowmeter calibration rig, currently using
water as the test fluid, has been constructed using a stainless steel tank
and pipework. Two independent centrifugal pumps with variable speed
drives are used to control the flow rate through the rig. The tank has a
multiple baffle and weir arrangement, which, together with the positive head
curve characteristics of the pumps and long test section lengths, ensure ideal
flow conditions are achieved.
Fiscal standard master meters provide the reference for flow and volume.
These reference meters, along with pressure and temperature sensors, are all
traceable to national standards, giving a verifiable accuracy of better than
0.25% for a flowmeter calibration. Higher accuracies will be achievable when the performance history develops. The system has been designed in
conjunction with, and commissioned by, TUV NEL who are custodians of
the UK national standards for flow measurement.
The flow rig has a range of calibrated master meters giving a current
calibration range from 2.5 to 4166 litres per minute (0.15 to 250 m3/hr).
The rig is designed to calibrate flowmeters using both water and fuel oil.
Most flow measurement devices can be calibrated using the flow rig,
including liquid turbines, coriolis, positive displacement, vortex and
differential pressure meters.
