How to calibrate metal tube rotor flow

Abstract: The information on how to calibrate the metal tube rotor flow is provided by the excellent flowmeter and flowmeter manufacturers. Because the remote metal tube rotameter is between the input pressure source and the generated 4-20mA current signal, it is not possible to calibrate the metal tube rotameter by conventional methods in addition to machinery and circuits. It is determined by the principle of the device structure. because. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the article on how to calibrate the flow rate of metal tube rotors. Because the remote metal tube rotameter is between the input pressure source and the generated 4-20mA current signal, it is not possible to calibrate the metal tube rotameter by conventional methods in addition to machinery and circuits. It is determined by the principle of the device structure. Because the metal tube rotameter is between the input pressure source and the generated 4-20mA current signal, in addition to machinery and circuits, there is also a microprocessor chip that operates on the input data. Therefore, the adjustment is different from the conventional method. In fact, the manufacturer has also explained the calibration of the metal tube rotameter. Since each part of the metal tube rotameter needs to be adjusted individually and must be adjusted jointly, the actual calibration can be carried out according to the following steps: first do a 4-20mA Fine-tuning is used to correct the D/A converter inside the transmitter. Since it does not involve sensing parts, no external pressure signal source is required. Do a full fine-tuning again to make the 4-20mA, digital readout match the actual applied pressure signal, so a pressure signal source is required. Finally, make the re-quantity range, and make the analog output 4-20mA match the external pressure signal source through adjustment, and its function is exactly the same as that of the zero (Z) and range (R) switches on the transmitter shell. Some people think that the range of the metal tube rotameter can be changed as long as the HART Communicator is used, and the adjustment of the zero point and the range can be performed without the need to input a pressure source, but this method cannot be called calibration, only called calibration. for“set range”. True calibration requires a standard pressure source input to the transmitter. Because range adjustment (LRV, URV) is not a calibration without the use of a standard, output adjustment (transmitter conversion circuit) ignoring the input part (pressure input to the transmitter) is not a correct calibration. Furthermore, the relationship between pressure and differential pressure detection components, A/D conversion circuit and current output is not equal. The purpose of calibration is to find out the changing relationship of the three. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'How to calibrate the flow rate of metal tube rotors'

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