Verification Regulation of Flow Standard Facilities by Master Meter Method
Some standard content:
The People's Republic of China National Metrology Verification Regulation JJG 643—2003
Flow Standard Facilities by Master Meler Method2003-03-05 Issued
2003-09-01 Implementation
Issued by the General Administration of Quality Supervision, Inspection and Quarantine JJG643—2003
Flow Standard Facilities by Master Meler Method Flow Standard Facilities Master Meter Method JJG643-—2003
Replaces JJG643—1994
JJG267—1996
This regulation was approved by the State Quality Supervision, Inspection and Epidemic Prevention General Administration on March 5, 2003, and is expected to be implemented on September 1, 2003.
Responsible unit: National Flow Capacity Metrology Technical Committee Main drafting unit: China Institute of Measuring Science and Engineering Drafting unit: Dalian Niulong Instrument Co., Ltd.
Beijing Daqing Liankeng Commercial Technology Center Co., Ltd.
Dandong Beitemen Automation Engineering Instrument Co., Ltd. Henan Measuring and Measurement Institute
This regulation is entrusted to the National Flow Capacity Technical Committee for interpretation. Main drafters of this regulation:
Yi Huiming
Zhai Xiuzhen
Participating drafters:
F Baihe
Shi Xiting
He Shaowen
Zhu Xiaoguang
Kong Qingli
J.IG 643—2003
(China Institute of Quantitative Science)
(National Institute of Scientific Research)
(National Water Flow Metering Station)
(Lianjiang Meter Co., Ltd.)
(Beijing Daqing Lianyi High-tech Co., Ltd.) (Dandong Beite Automation Engineering Co., Ltd.) (Henan Metering and Testing Institute)
Working Principle
3.2 Construction
4 Performance Requirements
4.1 Standard Flow Total||t t||42 Temperature, minimum measurement uncertainty
4.3 Metering instrument
Control system
5 Technical requirements for use
5.1 Fluid conditions
5.2 Flow conditions
Sealing
6 Metering instrument control
Verification conditions
Verification items and verification methods
Verification results and processing
Verification cycle
Appendix Form of verification certificate
JJG 643---2003
1 Calibration procedure for flow standard device using standard meter method This procedure applies to the flow standard device using standard meter (i.e. standard flow meter) method (hereinafter referred to as standard device) for flow calibration and subsequent verification.
2 Terminology
2.1 Fixed-point use: The calibration point of the standard flowmeter is determined by the calibration personnel of the device. 2.2 Non-fixed-point use: The calibration range of the standard device is determined by the calibration range of the standard flowmeter. 2.3 Flow-meter drop curve: The standard flowmeter with instrument efficiency. After calibration, the instrument coefficient and flow value are the same.
2.4 Flow-meter correction value curve: The standard flowmeter without instrument coefficient: After inspection, the flow rate can be given. The flow rate value is the same as the flow rate value.
2.5 Quantity stability within the accumulation time: The change of flow rate within a certain period of time. 2.6 Flow stability between cumulative time: The change of flow rate between each measurement of the standard device: 3 Overview
7.1 Working principle
Using the standard flow meter (which can be a velocity flow meter, an accumulation flow meter, a critical flow meter, a mass flow meter and a heat meter, etc.) as the standard band, the fluid continuously passes through the standard flow meter and the flow meter under test at the same sealing interval to compare the output flow values of the two, and then confirm the metering performance of the flow meter under test. 3.2 Composition
The standard device mainly consists of five parts: fluid source, test pipeline, standard flow meter, timer and control system.
3.3 Purpose
The standard device is a value transfer standard for closed pipe flow, and can be used for verification and calibration of various types of flowmeters and research on some test methods.
4 Metrological performance requirements
4.1 Standard flowmeter
The standard flowmeter is used at fixed point and non-fixed point. 4.2 Measurement uncertainty of temperature and pressure
4.2.1 The flow measurement uncertainty caused by the temperature measurement uncertainty shall not exceed 1/5 of the expanded uncertainty of the standard device. Otherwise, the standard device shall take into account the temperature measurement uncertainty. 4.2.2 The flow measurement uncertainty caused by the pressure measurement uncertainty shall not exceed 1/5 of the expanded uncertainty of the standard device. Otherwise, the standard device shall take into account the temperature measurement uncertainty. The standard uncertainty should take into account the measurement uncertainty. 4.3 Timer
JJG6432003
4.3.1 When using a standard condensing flowmeter to calibrate a cumulative flowmeter, or when using a standard cumulative flowmeter to calibrate a dancing flowmeter, the standard device should be equipped with a stop timer
4.32 The timer should have a vibration signal output 1
4.3.3 The minimum reading of the timer should not be greater than .154.3.4 The stability of the timer h is generally lower than 1/10 of the accuracy of the standard device. 4.4 Control system
4.4.1 The basic uncertainty of the flow measurement caused by the data collection, signal processing, data processing and signal instability should not exceed 1/5 of the standard device uncertainty. Otherwise, the combined standard uncertainty of the standard device should take into account the data. The sampling, signal processing, data processing and communication should be stable. 4.4.2 The control equipment should have good operability. 5 General technical requirements
5.1 Fluid conditions
The fluid should be a gas or liquid, and its flow should be a steady flow. 5.2 Pipeline conditions
5.2.1 A test pipeline can use a standard flowmeter with reduced parallel connection. The straight pipe sections before and after the standard flowmeter should meet the requirements of the pipe section of the same type of flowmeter: 5.2.2
5.2.3 The flow rate regulator should be installed in the test pipeline. 5.2.4 The temperature measurement position should be upstream of the flowmeter. 5.2.5 The positive measurement should be placed upstream of the flow. 5.2.6 The pipe grid should be filled.
5.3 Sealing
At a working pressure of There should be no leakage at the joints of the components of the standard equipment. 6. Metering Instrument Control
The program includes the initial calibration and subsequent calibration. 6. Calibration Conditions
6.1.1 Calibration Equipment
6.1.1 The standard flowmeter with matching instrument should be calibrated with matching instrument. Otherwise, the uncertainty of the matching instrument should be considered.
6.1.1.2 The standard flowmeter is calibrated under the fluid conditions in use. When the fluid conditions used in the standard flowmeter are different from the calibrated fluid conditions and have a non-negligible effect on the performance of the standard flowmeter, corrections should be made to give the measurement uncertainty of the corrected flowmeter. 6.1.1.3 The flowmeter setting of the calibration standard flowmeter should be set to a value that is higher than the expanded uncertainty of the standard flowmeter.
6.1.1.4 The uncertainty of the expansion of the timer should be better than that of the timer: 6.1.2 Environmental conditions
Temperature and pressure,
6.2 Verification items and verification methods
6.2.1 General inspection
JJG 6432003
Use daily measurement and porcelain inspection to check the installation. The results should meet the requirements of 4.1, 4.2, 4.3.1, 4.3.2, 4.3.34.4, 5.1.5.2.
6.2.3 Sealing injection test
Start the control device so that the flow position is in the middle of the calculated path before flowing: Use the tape gauge method to check the connections of the device, and the results should meet the requirements of 5.3
6.2 .3 Calibration of standard flowmeters
6.2.3.1 Calibration points of standard flowmeters
For standard flowmeters used at appropriate points, calibrate each flowmeter used. The number of calibration points should be at least 10. For standard flowmeters with fixed points, the number of calibration points should be more than the calibration points of network flowmeters in the whole process: calibrate each point once
(.2.3.2 Calibration method Calibrate the standard flowmeter according to the standard regulations of the same type of flowmeter. 6.2.3.3. Verification results of standard flowmeters 1
For standard flowmeters used at fixed points, the instrument coefficient (including flow in coefficient and outflow coefficient) shall be used. When standard flowmeters used at fixed points do not use instrument coefficients, the flow correction values of each verification point shall be given. For standard flowmeters used at non-fixed points, when the instrument coefficient is not used, the flow meter coefficient shall be expressed by a line and a graph
For standard flowmeters used at non-fixed points, when the instrument coefficient is not used, the flow meter coefficient shall be expressed by a flow rate function curve:
6.2.4 Uncertainty of Class A standard flowmeters 4, calculation 6 .2.4.1 When using the standard flowmeter at a fixed point,
When using the instrument coefficient:
Where: d,
—A-level standard uncertainty of the first calibration point; 1/: K, —-Average value of the instrument coefficient of the first calibration point, 1/. When not using the instrument coefficient:
Where: d,
—Standard deviation of the leakage correction value of the first calibration point; 1/: Average value of the indicated flow rate of the first calibration point, /h. When the standard flowmeter is not used, the standard flowmeter of the first calibration point is not used, -(*)m
When connecting in parallel with the standard flowmeter:
Where: --
I.TG 6-43-- 2003
The corresponding flow of the standard flowmeter, when
m=I,w=(,
6.2.1.2 Non-fixed point flowmeter:
For the standard uncertainty of the flowmeter, 1/: the commonly used coefficient of the continuous flow, 1/
Not used in the table
Formula: c,
s - xx
-the minimum compensation for the flow of the standard flowmeter, m: the commonly used flowmeter of the standard flowmeter, mh
6.2.5 When the standard flowmeter is used, mh
6.2.5. 1 5 Standard variable calibration
Send the timing capacity vibration signal to the standard meter, 1, connect the power supply, read the successive value H (-1.2, .., 8) once every 1h and display the stability
- n 1xis
: the maximum value of Hz
f,
--accuracy value: H
system, shall comply with 4.3.4.
6.2.5.2 Time calibration
accuracy timer requirements, the minimum time of the first calibration as the previous full, the same standard timer and timing selection, set the time and standard timing low, flow into a release. Repeat the calibration for r (heart) times.
The first time:
Average difference:
A class standard uncertainty:
B class standard uncertainty:
5.2 Heart standard installation inspection standard limit
ar -t-
×100%
u=(uf +u -i+ + u+ !
JJC 6432M13
Standard source upgrade cost Dong Pai will be determined to determine the source of the cost of the measurement of the British small treatment, see t.1...1;
Standard actual year let the test and the use of the fluid case different caused by the cost of measurement uncertainty 6.[.1.21
Number of books, and treatment, the whole type of effect Di Xin does not require the expected flow measurement uncertainty, see 4.4.1;
u gold standard flow single book volume standard & set of small uncertainty. 6.2.? G.3.8 Flow integrity test 6.2.8.1 Test the pipeline at maximum flow and minimum flow respectively, and determine the stability of the pipeline at the maximum flow rate. 2.8.2 According to the method described in detail, the flow rate should be determined according to the desired time range. The result of the test is as follows: (-1, 2, 60) 4
Average assumption:
Relative difference:
In the United States:
: -0.1, 2..,
= 22 91 × 100%
In the formula: in... indeed, the single test of pet Ai drops by two numbers, - will, R.
The case of the same flow how to connect the tightness of the pick
i - time: ao.1
Continuous measurement () times of flow: (1, 2,,; 10) -: 14)
Output standard instantaneous flow meter calibration flow to allow: times the bottom of the continuous result received 0 times to call the average value of the value is
Half confidence:
Stability:
6.3 Verification result processing
JJG43-203
Verification compliance 6.4 Verification cycle The verification cycle of standard devices should not exceed the verification cycle of flowmeters: 6 Appendix A Verification standard table of filter standard devices 2. Flow range: 3. Extended uncertainty: = 2. Standard table method of flow standard devices 1. Flow range: 2. Extended uncertainty: 1. Flow stability: JJG 643—2003
Inner page format of the calibration certificate
Research, one
(cumulative time, cumulative time) 5. Instrument coefficient of the calibration point (fixed point use: use control table coefficient) measurement point nh)
only number (1m
6. The flow of the calibration point is corrected (fixed point use, small use compensation table system effect) flow image point! ()
The flow disk will be corrected! (nh ）
JJG643
? , flow meter system teaching curve (point use, use instrument coefficient
coefficient m
pressure meter operation:
…same (m/h)
& flow meter correction curve
(non-fixed point use: do not use meter coefficient) flow path positive signal (r)
type (m)
function formula:2-heart standard installation, check the standard without limit
ar -t-
×100%
u=(uf +u -i+ + u+ !
JJC 6432M13
Standard source upgrade costs will be determined by the cost of the standard to determine the uncertainty caused by the different fluid cases used, see t.1...1;
Standard actual year to allow the verification and transmission of the uncertainty caused by the different fluid cases to the measurement uncertainty caused by the expected flow measurement product, see 4.4.1;
u gold standard flow measurement standard & set of small uncertainty. 6.2.? Standard equipment Zhi扂 expansion of individual uncertainty
a close team, generally = 2.
G.3. 8.2.8.1 Carry out the inspection on the pipeline at the maximum flow and minimum flow respectively, and determine the stability of the pipeline at the maximum flow rate.2.8.2 According to the method described in detail, perform the inspection according to the flow rate within the desired time range (Note: -1,,,; 60) 4
Average assumption:
Relative difference:
In the United States:
Wu: -0.1, 2..,
= 22 91 × 100%
Wherein: In…the hospital, the single test drops by two numbers, - will, R.
The case is the same flow how to connect the tightness of the determination
i - time: ao.1
Continuous measurement () times of flow: (1, 2,,; 10) -: 14)
Output standard instantaneous flow meter calibration flow to allow: times the bottom of the identification call time to receive 0 consecutive results to the time to say the value of the average value is
Half confidence:
Stability:
6.3 Verification result processing
JJG43-203
Verification compliance A verification certificate shall be issued to the qualified standard device, and a verification result notice shall be issued to the unqualified standard device with the unqualified items noted.
6.4 Verification cycle
The verification cycle of the standard device shall generally not exceed the verification cycle of the flow meter: 6
Appendix A
, Verification standard table filter standard device
2. Flow range:
3, Extended range: =
2. Standard meter method flow standard equipment
1. Flow range:
2. Expanded uncertainty:
1. Flow stability:bzxZ.net
JJG 643—2003
Inner page format of calibration certificate
Research, one
(cumulative time, cumulative time) 5. Instrument coefficient of calibration point (fixed point use: use control meter coefficient) measuring point nh)
only number (1m
6. Flow correction position of calibration point (fixed point use, small use compensation meter coefficient) flow image point!()
Flow disk will be corrected! (nh)
JJG643
? , flow meter system curve (point use, use instrument coefficient
coefficient m
pressure meter operation:
...same (m/h)
& flow meter correction curve
(non-fixed point use: do not use position meter coefficient) flow rate path positive signal (r)
production type (m)
function formula:2-heart standard installation, check the standard without limit
ar -t-
×100%
u=(uf +u -i+ + u+ !
JJC 6432M13
Standard source upgrade costs will be determined by the cost of the standard to determine the uncertainty caused by the different fluid cases used, see t.1...1;
Standard actual year to allow the verification and transmission of the uncertainty caused by the different fluid cases to the measurement uncertainty caused by the expected flow measurement product, see 4.4.1;
u gold standard flow measurement standard & set of small uncertainty. 6.2.? Standard equipment Zhi扂 expansion of individual uncertainty
a close team, generally = 2.
G.3. 8.2.8.1 Carry out the inspection on the pipeline at the maximum flow and minimum flow respectively, and determine the stability of the pipeline at the maximum flow rate.2.8.2 According to the method described in detail, perform the inspection according to the flow rate within the desired time range (Note: -1,,,; 60) 4
Average assumption:
Relative difference:
In the United States:
Wu: -0.1, 2..,
= 22 91 × 100%
Wherein: In…the hospital, the single test drops by two numbers, - will, R.
The case is the same flow how to connect the tightness of the determination
i - time: ao.1
Continuous measurement () times of flow: (1, 2,,; 10) -: 14)
Output standard instantaneous flow meter calibration flow to allow: times the bottom of the identification call time to receive 0 consecutive results to the time to say the value of the average value is
Half confidence:
Stability:
6.3 Verification result processing
JJG43-203
Verification compliance A verification certificate shall be issued to the qualified standard device, and a verification result notice shall be issued to the unqualified standard device with the unqualified items noted.
6.4 Verification cycle
The verification cycle of the standard device shall generally not exceed the verification cycle of the flow meter: 6
Appendix A
, Verification standard table filter standard device
2. Flow range:
3, Extended range: =
2. Standard meter method flow standard equipment
1. Flow range:
2. Expanded uncertainty:
1. Flow stability:
JJG 643—2003
Inner page format of calibration certificate
Research, one
(cumulative time, cumulative time) 5. Instrument coefficient of calibration point (fixed point use: use control meter coefficient) measuring point nh)
only number (1m
6. Flow correction position of calibration point (fixed point use, small use compensation meter coefficient) flow image point!()
Flow disk will be corrected! (nh)
JJG643
? , flow meter system curve (point use, use instrument coefficient
coefficient m
pressure meter operation:
...same (m/h)
& flow meter correction curve
(non-fixed point use: do not use position meter coefficient) flow rate path positive signal (r)
production type (m)
function formula:
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