/ Application Background /
The manufacture of high-quality electromagnetic flowmeters is inseparable from high-precision flow calibration devices. The flow calibration device is a standard equipment for the measurement department and the flow meter manufacturing enterprise to carry out measurement, transmission and traceability tests.
Mike team developed a set of high-voltage water tower as a source of pressure, using static mass method and standard table method, dedicated to the electromagnetic flowmeter calibration device. The first-class fluid flow device class with device uncertainty better than 0.05% passed the verification appraisal of the Shaanxi Metrology Institute.
A special overflow device is designed inside the 35-meter-high and 200-cubic-volume water tower, so that the fluctuation of the water level in the calibration measurement does not exceed 8mm, and the stability is better than 0.01%. It is the first high water level in the northwest region. Water tower regulator with large volume and high stability.
/ Device Benefits /
1, the device accuracy is high
The accuracy index of the flow calibration device is represented by the uncertainty of the device.
The uncertainty of the first-class liquid flow standard device is 0.03-0.05%; the uncertainty of the second-class liquid flow standard device is 0.1-0.2%; and the uncertainty of the third-class liquid flow standard device is ±0.5%.
According to the “JJG 164-2000 Liquid Flow Standard Device†verification procedure, the device uncertainty is mainly determined by the timing, commutator, and electronic scale. We chose the most professional commutator manufacturers in China and high-precision timers, and selected Sartorius' high-precision electronic scales to ensure that the uncertainty of the flow device is better than 0.05%.
2, practicality
The flow calibration device adopts a liquid flow standard device scheme combined with a static mass method and a standard table method. The static quality verification system can not only calibrate the high-precision flowmeter within 0.2%, but also be used for regular calibration of the standard table to ensure the long-term stability of the standard table. The standard table method verification system implements real-flow calibration of the measured meter, which not only retains the advantages of reliable, stable, and high accuracy of the static mass method, but also has the advantages of high efficiency of the standard meter method, frequent commutation of the device, and long service life. advantage. The device can meet the production calibration of various flowmeters that can be calibrated in the DN15~DN500 range.
3, high stability
The stability of the device flow depends to a large extent on the stability of the pressure source.
There are three commonly used voltage regulators: water tower regulator method, container regulator method, frequency control method. The container flow stabilizing method has poor flow stability. The frequency conversion speed control method mainly depends on the change of the power frequency, and the stability is poor. The regulator of the high-level liquid flow calibration device abroad generally adopts the water tower overflow pressure stabilizing method, but due to the overflow voltage regulator There are relatively high demands on the environment and the site, and the costs are high.
At present, more methods are used in China for frequency conversion and speed regulation of water pumps and regulators. At present, the highest level of calibration and real flow research institutes in China, the National Flood Calibration Center, and the Tianjin University Flow Laboratory's water flow calibration device use water tower stability. Pressure method.
4. Our water flow calibration device has obtained a special measurement authorization certificate. It can provide calibration and calibration testing for customers who need testing in the society.
/ contact us /
High-precision electromagnetic flowmeters need to refer to the actual situation when implementing specific measures for measurement. Our technical team will provide you with the best product solutions based on the site environment. Our company has a standard technical system, strong technical support, a complete industrial chain, can provide you with a full range of customized services.
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