Calibrating a Matheson Flowmeter-help appreciated

[hannibalrc]

how do I calibrate a gas flowmeter, Matheson brand Mod 8L781 A132 A1

[Jim Wynne]

In Reply to Parent Post by hannibalrc

how do I calibrate a gas flowmeter, Matheson brand Mod 8L781 A132 A1

Welcome to the Cove.

In order to calibrate a flowmeter such that you have the requisite traceability and knowledge of uncertainty factors you will need a properly qualified standard source. This means that the best way to do it is (generally) to use a qualified outside calibration lab. Unless you have a lot of flowmeters that have to be calibrated on a regular basis, the equipment necessary to do it in-house is probably prohibitively expensive, and would also need periodic calibration.

[BradM]

In Reply to Parent Post by Jim Wynne

Welcome to the Cove.

In order to calibrate a flowmeter such that you have the requisite traceability and knowledge of uncertainty factors you will need a properly qualified standard source. This means that the best way to do it is (generally) to use a qualified outside calibration lab. Unless you have a lot of flowmeters that have to be calibrated on a regular basis, the equipment necessary to do it in-house is probably prohibitively expensive, and would also need periodic calibration.

Jim is correct. Flow is a very involved device to calibrate (at least for me).

Aside from everything Jim mentioned above, you would need some type of manifold to achieve steady state flow to compare your standard, and your unit under test (UUT). Or, you need a device that can produce a flow of a certain rate. Neither of which are inexpensive.