Set Zero, when the fluid is in the static state, the displayed value is called “zero point”. When the “Zero Point” is not really at zero, the incorrect read value is going to be added into the actual flow values. Generally speaking, the lower the flow rate, the higer the error .
Set Zero must be carried out after the transducers are right installed and the flow inside is in the absolute static state (no liquid moved in the pipe line). Set Zero also is very important step when recalibrating the meter in lab. Doing this step enhances the measuring accuracy and flow offset can be eliminated .
Our TF1100 series ultrasonic flowmeter has strict tests of dynamic and static calibration and zero calibration before leaving the factory. In general, it can be measured without setting zero point on site. However, when the measured liquid’s flow rate is very low, the error will get higher, so the error caused by zero point can not be ignored. Static zeroing is necessary to improve the accuracy of low flow velocity measurement.
Pls note: when the flowmeter sets zero points, the fluids must be stop flowing .
Post time: Sep-02-2022