Gas Flow Measuring Instruments

JJG 2064-1990 Gas flow meter calibration system JJG2064-1990 standard download decompression password: www.bzxz.net
This system is applicable to the calibration of gas flow meter in pipelines. It specifies the purpose of the national gas flow benchmark, the full set of basic metering instruments included in the benchmark, the metrological parameters of the benchmark, and the procedure for transferring gas flow values ​​by means of benchmarks and standards such as temperature, mass, time, pressure, length, and standard flowmeters, and specifies its uncertainty and basic calibration methods.

Gas flow metering instrument calibration system
JJG2064—1990
Gas flow metering instrument
Calibration system
Furificatian Schome of Gus FluwMeasuringInstroments
JJG 2064—1990
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This metrological calibration system will be submitted to the supervision code: car month approval code: and 1 year travel
Drafting unit: China Institute of Science and Technology for verification system The drafting unit is responsible for the interpretation of the missing technical provisions of this calibration system Main participants:
China Metrology Research Institute of Flow
The most common
working metrological instrument
integrated flow meter and its calibration system block diagram
Volume flow meter calibration system
This system is used for the calibration of gas flow meters in medium and low pressure channels. It stipulates the national standard gas flow rate (0.3·120m1 standard volume flow rate under normal conditions), the standard includes a full set of basic parameters and standards such as temperature, mass, time, length, etc., as well as new and standard gas flow meter calibration values, and explains the uncertainty and good connection methods, etc. 1. Gas flow meter standard instrument 1. The gas flow meter standard instrument in the pipeline is used to transmit the gas flow value and unify the gas flow value. 1.1 The gas flow meter standard instrument in the pipeline is composed of the following parts: a. 2000F. bell
h: 50iT. bell cover
c, 501. bell calibration system
core container
r. overflow meter
3: office meter
h. timing instrument
1. control console
.2 The components of the gas flow meter standard instrument in the pipeline include the main connection source, the source connection point, the source of pressure, the timer, and the measuring time. 1.3 Standard flow range of gas flow in pipeline 20001: 30-120 (volume flow under standard conditions); 5001. Bell rate: 3-30m/h (volume flow under standard conditions); 50[bell: 0.3～3m3h [method under standard conditions] 1.4 The accuracy of the basic standard of gas flow (8.2%-.1% (2) The accuracy is less than 9% with the same 1.5 Basic standard of gas flow in pipeline Air is allowed to be used as the working medium: 2. The first and second-class gas flow standards are calibrated by the standard flow meter, the time measurement method or the length 1 direct measurement method: the standard flow meter is used for transfer and comparison. 3. The first-class gas flow standard is only
, and its uncertainty is generally (.2%-0.5%.
4. The third-class gas flow standard has a total of
, and its uncertainty is 0.5%,
5 Standard flowmeter
Standard flowmeter is based on direct measurement, its titration is 0.5%1.358
3 Working measuring instruments
6 Gas flowmeter, which refers to a gas flowmeter that can be calibrated with air quality. To calibrate various gas flowmeters, use direct mass measurement method and comparison method. 8. Determine the volume flow of various gas flowmeters. The accuracy should be less than or equal to 1/
of the uncertainty of the flow meter during calibration. The uncertainty of the meter is 1%-2.5%.
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Gas flow meter system cabinet diagram
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5.x%-3 1%
Standard flow meter certificate
In the flow meter comparison method
The most practical clean gas
This result measurement step
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