Abstract: the scale instrument coefficient of vortex precession flowmeter measurement uncertainty evaluation information produced by excellent
flow meter, flow meter manufacturer to offer you the quotation.
Abstract: precession vortex flow juice instrument coefficient to establish mathematical model, and on this basis to assess the relative uncertainty of input.
1 objective: to assess the precession vortex flow meter instrument coefficient of the uncertainty of measurement results.
2 in accordance with the measurement.
More flow meter manufacturers choose model price quote you are welcome to inquire, here is a scale instrument coefficient of vortex precession flowmeter measurement uncertainty evaluation of the article details.
Precession vortex flow juice instrument coefficient to establish mathematical model, and on this basis to assess the relative uncertainty of input.
1 objective: to assess the precession vortex flow meter instrument coefficient of the uncertainty of measurement results.
2 measurement basis: JJG198 & ndash;
94 'speed meter' metrological verification procedures.
5, measuring range: (
5 ~ 1200)
M3 / h, the test medium for air.
Four measured object and its main performance: the precession vortex gas meter: + 100;
Flow range (
28 ~ 400).
m3 / h;
The basic error is not more than & plusmn;
0%.
5: measurement process under specified environmental conditions, according to JJG198 & ndash;
94 'speed meter' verification regulation, with air as medium, measured by the standard table method.
The first time I will be in the ith point and the quantity of detected flowmeter output pulse gas flow standard device in which the truth of 0 to the ratio of the standard volume flow as a first point for the first time I I measurement instrument coefficient.
6 application of assessment results: measurement result accords with afore-mentioned conditions, generally can directly use the uncertainty of evaluation results, for other meter instrument coefficient of the uncertainty of measurement result evaluation can be evaluation method.
Two mathematical model of the three sources of uncertainty of measurement instrument coefficient of the sources of the uncertainty mainly includes: the introduction of measurement repeatability measurement standard uncertainty u4 and standards into the standard uncertainty of uB.
Amount of leaching 0 1% repetitive introduction of the standard uncertainty of UA (
Nij）
Evaluation under the condition of the repeatability of a vortex precession flowmeter, flow selection in zui 50% of the mass flow measurement at 6 o seconds, independent repeated measurement by sonic nozzle method column 1 o time to get a set of measurement, such as table 1.
2 measurement standard is introduced into the relative uncertainty of ubrel (
Vij）
Time verification when measured flow standard device, the value for its uncertainty originated from the error of measurement of gas flow standard device, the uncertainty of B class methods.
The instruction is given, the expanded uncertainty of the gas flow standard device U = 0.
5%, k = 2, so: ubrel (
Vij）
=O.
5/2 = 0.
25% 4.
3 instrument coefficient of vortex precession flowmeter measurement data (
Table 2. )
5 synthetic standard uncertainty evaluation 6 measurement results and uncertainty report precession vortex flowmeter meter coefficient as a measure structure above is all there is in this article, you are welcome to inquire me factory flowmeter selection, quotation, etc.
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