Scale rotor flowmeter measurement error analysis

Abstract: the measuring error analysis of rotor flowmeter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. From the principle of measurement of the rotor flow juice, it is by the orifice differential pressure type flowmeter and the turbine flowmeter combination. It is a combination of orifice differential pressure flowmeter measurement error, and error of the turbine transmission system, therefore, the error of the rotor flowmeter may be. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a scale rotor flowmeter measurement error analysis article details. From the principle of measurement of the rotor flow juice, it is by the orifice differential pressure type flowmeter and the turbine flowmeter combination. It is a combination of orifice differential pressure flowmeter measurement error, and error of the turbine transmission system, therefore, the error of the rotor flowmeter may contrast pressure meter error is big, under set conditions of differential pressure type flowmeter measurement error is 1 - 2%, and the error of the rotary flowmeter ji factory for & plusmn; 4%, from the measuring signal conversion or transfer link analysis, rotor flowmeter at least a few of the following error: 1. The throttling orifice plate to produce the error of the instrument is through the orifice throttling. Orifice differential pressure of the delta P make the impeller rotation, that is to say, the orifice differential pressure signal is not from differential pressure transmitter, but by the impeller. So. Instrument does not rule out the error of the differential pressure type flow meter, please. In rotor flowmeter, according to the different flow range, with three different pore diameter d20 orifice, this way is impossible to the orifice differential pressure flowmeter with high precision, because the differential of orifice flowmeter is under the condition of a series of known, carefully designed. Thus it can be seen that the rotor flowmeter throttle orifice error contrast pressure flowmeter. 2. The differential signal is converted into the impeller speed, △p / n) Conversion error measuring signal conversion of the inevitable will produce error, the differential signal into a turbine speed, the conversion error between them may be very big. The differential is the potential energy, to make the impeller rotation, through the nozzle to potential energy into kinetic energy, in the instrument, the relative position of nozzle and nozzle baffle plate slightly change, will affect the speed of the impeller, cause measurement error. 3. Steam flow measurement errors caused by pressure fluctuation instrument shows the mass flow, mass flow not only depends on the fluid velocity, and Hugh density depends on the flow, when steam pressure fluctuations, yan steam density with fluctuations, pressure fluctuation is large, the density fluctuations too big, the resulting flow measurement error. Set up in the rotor flowmeter pressure compensation device, the pressure compensation device is mechanical structure, according to the steam pressure value set in advance. Thus, the compensation mode cannot be effectively correction fluid density, more cannot track fluid density fluctuations. As a result, the steam flow measurement errors caused by pressure fluctuation will exist corresponding. 4. Moisture content in steam flow measurement error caused by rotor flowmeter measurement of saturated vapour is contains water wet steam, as well as differential pressure type flowmeter. Change as a result of the instrument measuring object, which will produce larger error of measurement. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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