Vortex and turbine flowmeter calibration
For calibration of vortex and turbine flowmeters, you should use the same principles of calibration of magnetic flowmeters as mentioned above. The difference is that for the input standard, you should use a frequency generator. For this type of flow transmitters, you should also use the calibration instructions. Follow provided by the manufacturer.
In flowmeters whose sensor output produces a sequence of pulses. K-factor is used to convert the number of pulses per unit volume. If we want to define K-factor in simple terms, we can call it dividing factor.
For example, if the K-factor is a turbine flowmeter of 200 barrels per minute and produces 1000 pulses per minute, it can be quickly calculated that the flow is 5 barrels per minute.
All flowmeters whose sensor output is in the form of a pulse are accompanied by a calibration certificate when sent to the consumer by the manufacturer. The calibration certificate shows in what flow range the flowmeter is calibrated and also what the average K-factor is. The K-factor is actually the number of pulses produced by the flowmeter per given volume flowmeter.
A K-factor is a number that is entered into a batch meter to indicate a reading in an engineering unit. For example, suppose a flowmeter has a K-factor of 210 pulses per gallon. If we want the display to show the flow rate in gallons per second, we have to set the K-factor of the flowmeter to 210. Now if we want to use a Totalizer with this flowmeter and configure it to be a US gallon collector, we have to set the K-factor to 210, assuming that we want to set the Totalizer to a collection function. As one tenth of a gallon does, the K-factor value is equal to 21.
For example, suppose a flowmeter has a K-factor of 210 pulses in US gallons. If we want the display to show the flow rate in gallons per minute, we have to set the K-factor of the flowmeter to 3.5.
Meter factor is a correction factor that is calculated as a result of flowmeter calibration by comparing it with a flow standard. If a standard volume of 10 barrels passes through the flowmeter and reads 10.55 barrels, the equipment error is 0.55 barrels. Here the Meter factor can be calculated as 10 5 10.55. As a result, in this example the Meter factor will be equal to 0.9478. Some experts combine K-factor and Meter factor and find a correction factor. The K-factor is usually set by the manufacturer on the flowmeter, and the meter factor may change each time the flowmeter is calibrated.
Meter factor can be applied to almost all types of flowmeters
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