JJG 943-1998 Verification Procedure for Total Suspended Particle Samplers JJG943-1998 Standard download decompression password: www.bzxz.net
This procedure applies to the verification of total suspended particle samplers that are newly manufactured, in use, and after repair.

Verification Regulation of TotalSuspended Particle Sampler JJG943-1998
fullSuspendedPariiculatc
Sampler
1998-11-12 Issued
1999-05-01 Implementation
National Quality and Technical Supervision Bureau Issued
..:943-1998
Verification Regulation of
TotalSuspendedParticleSampler PurticulateSamplerJJG943—1998
This verification procedure was approved by the State Administration of Quality and Technical Supervision on November 12, 1998, and came into effect on May 1, 1999
Author: Environmental Chemical Metrology Technical Committee Drafting unit: Shanghai Jiguan Testing Technology Research Institute The drafting unit is responsible for interpreting the technical provisions of this procedure The main drafter of this procedure:
Zhang Xunbiao||tt ||Lu Desheng
Participating drafters:
Gao Wenhua
Shao Sensheng
Chen Zhiwen
Yang Xueliang
943-198
(Shanghai Institute of Metrology and Testing Technology) (Tongji University)
(Shanghai Testing Center)
(Shanghai Hongzhongguang Equipment Factory)
(Shanghai Hongzhong Equipment)
(Shanghai Hongning Electric Equipment Factory)||t t||Technical requirements·
Verification conditions
Post-verification method·
Extension of verification results
JJG9431998
Explanation of the formula for flow rate allowable error
Attachment 2 format requirements
Appendix 3
Format on the back of the instrument
JJ:943-—1998
Verification procedures for total suspended particulate samplers
Non-verification procedures Verification of total suspended particle sampler (hereinafter referred to as sampler) after manufacture, use and repair.
1 Overview
Total suspended particle sampler is used to measure the mass concentration of total suspended particles in the air. The basic principle is: let a certain volume of air pass through a filter membrane of known mass, and the particles in the air are retained on the filter membrane. According to the mass of the filter membrane and the volume of the air in the filter membrane, the mass of the total suspended particles in the air is determined. The sampler includes a sample head, a gas holding device, a flow control device, a fixed installation process and other parts. 2 Technical requirements
1 Insulation resistance: less than 20Mn
2 Appearance
2.1 The name, model, abbreviation, manufacturing unit, date of manufacture and manufacturing license mark and number of the instrument shall be marked on the sampler.
2.2 The components should be complete, the operation should be normal, and the display should be clear. 2.3 Damage to the electrical performance of the components
3 Allowable error of the width of the air inlet
3.1 Maximum flow: not more than -2.5%:
3.2 Flow rate: not more than +2%:
4 System air flow: not more than 1.
5 Allowable error of sampling time: less than -0.5%: Flow rate allowable error; not more than +%.
3. Verification conditions
7 Verification environment
7.1 Ambient temperature: 10-.30℃
7.2 Relative humidity: 85%,
7.3 Power supply: 220±22)V, 50H8 International standard instrument for verification
.1 Maximum current, standard current meter: general range: 0.8..1.2/min, level 2.5. 8.2 Standard flow meter: flow range 2020Lni, 2.5 level, J.[43—1998
8.3 Foot: select 1150. error not 101
8.4: 3m-0.
Transmitter equipment
9.1 Series meter: series range core -7kT, + level.
flow it range 2.s--25 Lmin, 4 level;
single release 0, + -- 4 1/mn, 4 level
wheel edge Mengyi: V, level,
electric meter: range 500V, 1.5 level:
regulating transformer: core. -250 V, 1500 W.3.6
【Factory connection point empty course valve: general price 50mm
concubine factory stack connection
four verification methods
0 run edge electric positive inspection standard
will be collected! The beauty of the child is set to eliminate the position, do not fall on the power line, Sichuan absolutely green electric element through the lifting sampler power supply part of the housing gold rear parts of the question electric feather.
Sichuan welcomes the danger is
sound eye production connection specification purple, and to pass the source, through the actual operation of the parts violation inspection: 12 into a variable error inspection standard
you card people measure the mother gas variable
for the ruler flow English support device, all and the marked recording points; for the current sampling, all accurate ten measurement points, one can not be in the middle, the value of each measurement point is the average value, the test! Competition error "formula (!: *-×100%
formula has been, is the design width of the air inlet.
system with the air single determination
room degree is 0.10.21 standard version of the collection of the filter when the air inlet: with the factory and also take over, the sampling outlet and the flow to the end of the connection, open the sampling meter, wait until the ancestor to stabilize to read the flow length Kang!: pain gas products according to formula (2):
In the formula, negative The sampler is designed to intercept the flow. 1. The average time of the sampler is not calculated. The sampler is not tested. The average time is 20. The sampler is not tested. The sampler is not tested. The average time is 20. The sampler is not tested. The sampler is not tested. The sampler is not tested. The sampler is not tested. The sampler is not tested. The sampler is not tested. The sampler is not tested. Calculation
15 Flow rate allowable error determination
15.1 Use the interface to connect the standard flow rate to the sampler, and the total error of the time meter is connected.
15. Turn on the sampler, use the regulator to adjust the maximum voltage of the sample to 242V, and then adjust the negative voltage to 3, and then adjust the negative voltage to 198V. Then use the true wide screw to adjust the negative voltage to 6ka. After the flow rate is determined, read the flow rate Qa (m/rair) from the standard flow to ilL. 154 Measure the area of ​​the air supply port and calculate the area A of the sampling port. [5.4.13 The area of ​​the ten major flow ports is 41: As shown in Figure (1), the formula () is: A,—mr -
: ", - are the length and width of the outer side of the air inlet respectively; :, - are the length and width of the inner side of the air inlet respectively, 1542 for a flow to the same area 1: as shown in Figure (2), the formula (5) is calculated: AR?
formula: I - the radius of the grid factory; r - the same inner retreat should be
15.5 net flow error" () or (6) calculation. h
In the formula, =1,2.
:943-18
The largest error calculated by the above formula is the flow rate error of the sampler. V. Processing of the verification results
16 After verification, the sampler that meets the technical requirements of this verification regulation shall be issued with a verification certificate. 17 After verification, the sampler that does not meet the technical requirements of this verification regulation shall be issued with a verification result notice. 18 The inspection cycle of the sampler is 1 year.
Appendix 1
JJF 943—1998
Explanation of the allowable error of flow rate
In the 15th figure of the regulation: the actual product value is, the unit is; the actual intake air flow is A, the unit is: so the actual flow rate is A, the unit is mmin, the actual flow rate in / unit is Q, 760
with speed identification () becomes: the measured flow rate minus the design flow rate, and then divided by the design flow rate, the design flow rate is 0.3m,:bzxz.net
(Q: u4 - 0.310.3 =
Appendix 2
Instrument name:
Measurement unit:
Insulation resistance:
Air inlet width error: u1
System air filling 4
Sampling time error: D
Sampling speed error: Q
Calibrator:
Appendix 3
(1) Insulation resistance
(2) External
3] Air inlet width error:
【4）System full air:
（5）Sampling time error:
(6) Speed
JJC943
Format on the back of the calibration certificate
Calibration results
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