『National standard for electromagnetic flowmeter』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
What are the upper and lower limits of temperature measurement for electromagnetic flow meters?
Firstly, the country uses the absolute value of the maximum relative percentage error of the instrument as the accuracy level. Among them, the accuracy of the first level standard instrument is 0.005 0.02 0.05, and the accuracy of the second level standard instrument is 0.1 0.2 0.35 0.5. The accuracy of general industrial instruments is
1. 1.5 2.5 4.0 Relative percentage error=(measured value of the northern parameter - standard value of the northern parameter)/(upper limit value of the scale - lower limit value of the scale) * 100%
Secondly, how is the accuracy level of instruments in China divided?
? Basic error: Basic error, also known as citation error or relative error, is a simplified relative error. The basic error of an instrument is defined as follows: basic error=(maximum absolute error/instrument range) * 100=(indication value of the detection instrument - measured true value) MAX/(measurement upper limit - measurement lower limit) * 100% accuracy (referred to as precision). In order to facilitate the transmission of measurement values, the country has unified the accuracy (precision buffering) level series of instruments. By removing the "±" and "%" marks from the basic error of the instrument, it can be incorporated into the national unified instrument accuracy level series. At present, the commonly used accuracy levels for instruments produced in China include 0.005, 0.02, 0.05, 0.1, 0.2, 0.4, 0.5, 1.0, 1.5, 2.5, 4.0, etc. If the basic error of a temperature measuring instrument is ± 1.0%, it is considered that the accuracy level of the instrument meets level 1.0. If the basic er
1. Industrial instruments in China are divided into seven levels: 0.1, 0.2, 0.5, 1.0, 1.5, 2.5, and 5.0, and are marked on the instrument scale or nameplate
2. Electrical instruments in China are divided into seven levels: 0.1, 0.2, 0.5, 1.0, 1.5, 2.5, and 5.0
3. Instrument accuracy levels uniformly classified by the country include: 0.00
5、0.0
2、0.0
5、0.
1、0.
2、0.3
5、0.
4、0.
5、1.0、1.
5、2.
5、 4.0, etc
2. Does the electromagnetic flowmeter have to be filled with pipes?
The electromagnetic flowmeter must be filled with pipes for measurement, which is a basic requirement for ensuring measurement accuracy.
. 1. The measurement principle requires that the electromagnetic flowmeter operates based on Faradays law of electromagnetic induction, which requires the fluid to completely fill the pipeline and continuously pass through the electrode in order to accurately cut the magnetic induction line and generate induced electromotive force. Discontent with the tube can lead to: - significantly low measure
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