Master Flowmeter Calibration

As long as it is a positive displacement meter it should be fine, but I would caution against it. There are always problems introducing water to a fuel system designed for aircraft. If your master meter is a wheeled separate unit it may be easier to remove the water, but there will probably be low points in the piping or hoses that hold water which could be come entrained in the fuel and work its way into aircraft then freeze at altitude. If you are using a fixed master meter you should not use water.

In my 10 year fuels career in the Air Force we calibrated our tanker trucks with a portable positive displacement master meter. We would circulate fuel through the meter and back into the truck so we could pass the required amount of fuel through the meters. I feel more confident about this method than the Seraphin calibrated tank method. An even better (but more expensive) is the prover loop method that uses a known volume of pipe and a plug that slides down the pipe between sensors verifying the quantity of fuel that passes the meter.

Any more questions, feel free to ask!

Drew