Flow meters are always used to guarantee the correct operation of different industrial machines. Its function is to measure the speed at which a fluid or gas flows through it. Too much or too little flow can cause the machine to malfunction, so getting the flow meter readings correctly is important. For this reason, regular calibration of flow meters is often essential to ensure that the readings they provide are accurate. There are some standard practices to follow when calibrating your flowmeter, but here are five best practices to keep in mind to ensure your flowmeter operates at optimum capacity.
Often, if the standards used to calibrate the flowmeter are inaccurate, proper calibration cannot be provided. So it has to be more precise than the unit you are measuring. A general rule of thumb is that the calibration standard should be four times more accurate than the flowmeter under test. However, it should be noted that this may vary depending on the specific requirements for performing the calibration.
Traceability is an important form of documentation that helps measure the standard by which the flowmeter is calibrated. The standards you use must be traceable to widely recognized standards. By doing this, you can help verify that the calibration system you are using can properly calibrate your flowmeter.
Often, it is critical that the flow rate between the calibrator and the flow meter is kept constant. Since the calibration reading is determined in real-time based on the flow you receive from the flow meter, the reading must remain the same in order to stay the same.
In addition to evaluating the calibration method, the flowmeter should also be checked to ensure that the machine has no major issues that could alter the measurements. The person evaluating the product should check for fluctuation levels or temperature changes on the flow meter.
When performing calibration, it must be done under the same conditions as the flowmeter will actually work. There are many factors that can affect how well a flowmeter works, including:
density
sticky
Heat content of the liquid or gas being measured
If the calibration does not take these factors into account, it may not give correct readings. In general, the best way to ensure that all factors are taken into account is to measure at the flowmeter's normal capacity.
The tips above are just five best practices for calibrating flow meters. Yes, there are usually a few other things that should be considered. To ensure calibration is done correctly, it may be helpful to have it done by a calibration professional. Not only does this provide proper calibration, it also helps ensure the continued operation of the flowmeter.
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