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How to perform zero calibration on differential pressure flow meters?
Firstly, check if there is any leakage in the valve. If so, if there is still medium flow in the pipeline after the valve is closed, the valve needs to be replaced.. After confirming that there is no leakage in the valve, open the high and low pressure valves of the differential pressure flowmeter and the balance valve connecting the two. At this time, adjust the zero point of the differential pressure transmitter again. After the zero adjustment is completed, close the balance valve again to measure normally.
2. Is there a difference between zero point calibration and zero point calibration of a flowmeter?
Both are the same principle. Zero point calibration refers to delayed disassembly. After filling the flowmeter with liquid, close the valve at the pure diaphragm end of the flowmeter, which is a static check of the fluid in the pipeline. Zero point calibration of the flowmeter is to let the flowmeter recognize that there is no flow in the current state. I hope it can help you.
3. How to adjust the parameters of the flowmeter.
Flowmeter parameter adjustment operation process: Equipment: Flowmeter.
1. In the initial interface, you can right-click to enter the system settings menu, enter the password, press the "light up" left button to confirm and enter the settings.
System.2、 After entering the system, you can see that there are instantaneous flow parameters in the settings menu, which can be adjusted by moving up and down and pressing the right button to enter.
3、 When entering the second level menu of instantaneous flow setting parameters and scroll width, find the scale flow set
4、 After entering the scale flow setting item, you can set the scale flow, which is the method for modifying the range of the electromagnetic flowmeter. The function of the flowmeter is fully digital processing, with strong anti-interference ability, reliable measurement, high accuracy, and a flow measurement range of up to 1500:1. Ultra low EMI switching power supply, suitable for a wide range of power supply voltage changes, with good EMI resistance performance. Adopting a 16 bit embedded microprocessor, it has fast computing speed, high accuracy, programmable low-frequency rectangular wave excitation, improved stability of flow measurement, and low power consumption. Using SMD devices and surface mount technology, the circuit has high reliability.
4. Calibration specifications for online flow meters
Online flow meter calibration requires strict adherence to the standard process, with core points including calibration preparation, method selection, and operation steps. Specific execution must match equipment characteristics and environmental requirements.
. 1. Calibration preparation • Understanding the characteristics of the flowmeter: Accurate calibration requires mastery of the measurement principle, range, medium type, and other parameters of the calibrated flowmeter. Before calibration, it is necessary to consult the technical manual to clarify key indicators. Calibration equipment selection: Select the corresponding method equipment according to the type of flowmeter, for example, the standard meter method requires that the accuracy of the standard flowmeter is at least one level h