Some standard content:
National Metrology Verification Regulations of the People's Republic of China JJG 801-2(H4
Chemiluminescent Chloride Oxide Analyzer
Chemiluminescent NO/NO, Analyzers2004-11-09 Issued
2005-0509 Implementation
National Quality Supervision, Inspection and Quarantine Administration Issued JJG601-20U4
Chemiluminescent Ammonia Oxide Analyzer
Verification Regulations
Verification Rcgulation ot
Chemiluminescent No/No, AnalyzersJJG 801: 2004
Replace JG 801--1993
This regulation was approved by the National Quality Supervision, Inspection and Quarantine Administration on November 9, 2004, and will be implemented on May 9, 2005
Responsible unit: Enterprise Environmental Chemistry Measurement Technical Committee Main drafting unit: Sijia Standard Material Research Center Drafting unit: Hebei Shenghe Technology Development Co., Ltd. This regulation is entrusted to the Environmental Chemistry Measurement Technical Committee to draft the sample regulations Main drafter:
Qi Yonghua
Participating drafters:
Zhou Zeyi
Huang Jianhuibzxz.net
JJG 80f—3004
(National Standard Material Research Center)
(National Standard Material Research Center)
(Hebei Xianhe Science and Technology Development Co., Ltd.
2 Overview
3 Metrological performance requirements
General technical requirements
4.1: Appearance and power-on inspection
4.2 Insulation resistance
4.3 Insulation strength
5 Verification instrument control
Verification conditions
Verification items
Verification methods
Verification result processing
Verification period
Appendix A Description of standard materials
Appendix H
Appendix 1
J0—2M4|| tt||Verification certificate and verification result notification page format Verification record format
Scope
GM—2H4
Verification procedure for chemiluminescence nitrogen oxide analyzer This procedure is applicable to the initial verification, subsequent verification and inspection during use of chemiluminescence nitrogen oxide analyzer: 2 Overview
The basic detection principle of the chemiluminescence nitrogen oxide analyzer (hereinafter referred to as the "instrument") is that when the base bismuth reacts with hydrogen (NH4) to produce an excited state of nitrogen dioxide molecules (NO2), the excited state of nitrogen monoxide returns to the ground state and emits light. The intensity of the light emitted is positively correlated with the concentration of nitrogen oxides, and the detection ratio is used to detect the concentration of nitrogen oxides. The chemical reaction ratio is: NO10,-→NO.: 0,
Wherein·Emitted light
Selected gas VI In the presence of oxidizing gas, the selected gas first passes through the inherent converter of the instrument, converts the "oxidizing gas" into nitric oxide (N0), and then reacts with good oxygen (0) to produce the above chemiluminescent reaction, and the detected oxidized gas (-NO.) The difference between the total NO and the annual nitrogen is equal to the nitric oxide (i.e. NO, -NO=NO,) content in the gas. The structure of the instrument generally includes: oxygen generator, converter, detector, electronic unit, etc. 3 Metering performance requirements
And the metering performance requirements of the instrument are as shown in Table 1. Table 1 Metering performance requirements of the instrument
Strict measurement performance
Eastern error
Yo time.
The conversion efficiency of the second chemical creation is firm
4 General technical requirements
4! External information inspection: The drift of the measuring point shall not exceed ±3% and shall not exceed 130%. It shall not exceed 1% and shall not exceed ±2%. 4.1.1 The instrument shall be free from any damage, deformation or other phenomena which may affect its normal operation. The surface of the newly-made instrument shall be free of dents, obvious scratches and peeling. The instrument name, model, serial number, special date, manufacturer name, manufacturing and measurement license and serial number and other marks shall be completely removed. The instrument shall be neatly structured, all parts shall be connected tightly and fully equipped. The manufacturer's instruction manual shall be attached.
JJG8012004
4.1.2 During the inspection, all buttons and controls of the instrument shall be functioning properly, and the display shall be clear, complete and accurate.
4.2 System resistance
The insulation resistance of the filter phase to the ground shall not be less than M.4.3 The insulation resistance of the plastic wire to the ground shall be able to withstand 15.5)z, 5mA current, 1min test, and no wear and tear or other phenomena shall occur. 5.1.2.1 Gas standard material: Use 20%, 50%, 85% of the chlorine standard material as the standard material. The uncertainty of the oxidation standard material is not large. 5.1.2.2 Zero gas: Use 99% high purity gas. 5.1.2.3 NOx mixture: about 10% chlorine dioxide. 5.1.2.4 Flow rate and total volume range should be greater than 2 (X ml/min 5.1.2.5 Sand table: Graduation value should not exceed 0.1 #;5.1.2.6 Insulation resistance meter: 500V, 10 levels: 5.1.2.7 Insulation strength tester: voltage person 1, 5k5.2 Verification items E
Table 2, agreed items
Verification items Hall
Appearance and remote electrical inspection
Insulation hot electrical diagram
Insulation comprehensive degree
Show wet ticket
Door bottom work room
NO, conversion efficiency determination
Self-determination
Next gold determination
Jiang; 1. "" for the good sign double" for the new holding, check the temporary
2. After the main parts are reduced, it has a great influence on the measurement production, and its core is set to be adjusted again. 2
5.3 Inspection Symptom method
5.3.1 Visual and electrical inspection
JJG8012M4
Combined inspection method 4.1.1 and 2.1.2 are required for coverage. 5.3.2 Insulation test
If the power supply is not long, turn on the power switch, connect the insulation recording medium to the male and female terminals of the nuclear power line, and use insulated electrical wires to connect to the ground terminal. 5.3.3 Insulation test
If the power supply is not long, turn on the power switch, connect the insulation recording medium to the male and female terminals of the nuclear power line, and use insulated electrical wires to connect to the ground terminal. 5.3.3 Insulation test
If the power supply is not long, turn on the power switch, connect the two wirings of the insulation measurement instrument to the inspected point respectively, and connect them halfway to the new head of the inspected machine to prevent accidental drop of the electrical level. Arcing occurs during the test: 5.3.2 Adjustment before calibration
After preheating the device for at least 1.5 seconds, pass the meter through the heat exchanger to adjust the flow rate: Provincial gas flow, pay attention to seasonal points, the gas should be 85% of the sample, wait for it to stabilize, and then the small amount of the fake industry benefit will be the same as the standard: S.3.5 shows that the calibration film requirements are 20%, 50%, 83% of the sample. V0 standard gas, remember to seek stability: do it three times for each point, the arithmetic half of the second is the instrument indication, the formula (1) is the original conclusion, take the result of the value of Liu as the value of error (what): plan for many years with high false instrument, in the middle, pay attention to the calibration: A
instrument indication value calculation. 5 value:
one by one suitable false instrument N standard value
5.3.6 manual calibration
in the middle range of the instrument, receive the timely flow main collection request. Quick people thank the point of the instrument, stop about 50 people to make up for the standard gas, record the false pointer to buy a small value, accept the above data 6 times: simulated hope! The machine of the meter is reliable for the accuracy of the instrument (Cic-
formula:
. The first! European measurement channel;
6 European measurement value arithmetic control channel:
5.! .7 Check the time of the calibration
center to help the same amount, the flow during the calibration has been required, the gas is zero, and then the gas is about 50% of the N standard gas. After recording the stable value, stop the normal ventilation and let the instrument return to the common point: the common value is 33.8. Efficiency verification of LFGM1-204 In the instrument, according to the calibration flow, the mixed gas containing about 1% of N, select the indicated value, and stabilize the indicated value. Follow the same method for two consecutive times, and take the arithmetic average of the three times as the result. Calculate the conversion efficiency according to formula (3), where: C-average value of the measured values. C.-N, mixed gas concentration 5.3.9 Format verification × 100% of the sensor: After the instrument is preheated, at the highest basic task of the instrument, add a little gas, and let the ideal reading be 2! Then pass in a NO standard gas with a content of about % of the range, and read the signal as %: continue to run for 6 hours, pass in zero point gas every "h, and record the zero point value of 2. Pass in the same standard gas as above, and record the stable indication of 3: Calculate the drift (S) according to formula (4) and set the point value (2) according to formula (5). The one with the largest absolute value is the equal point source drift (). Take the largest value as the drift (28)
. . 2)(5, 202 × 11N)%
Formula A2,—1 The gas point of the season: 5 The indication of the second standard gas:
R——Instrument full volume:
5.4 Verification results and treatment
For the instrument that passes the verification of this regulation, a verification certificate will be issued: For the instrument that fails the verification, a verification result letter will be issued, and the unqualified items will be noted:
5.5 Standardized cycle
The verification cycle of the instrument is generally more than 2.
After the instrument is repaired or the main components are replaced, it should be sent for inspection at any time:4
JJC S01—2004
Description of Standard Materials
Besides, the use environment of the instrument is different, and the instrument's function is different. The use range of quite a few chemiluminescence nitrogen oxide analyzers is very low, generally below 1×10-". Therefore, the gas standard materials used for verification can also adopt the recognized mass flow dynamic gas distribution device to prepare low liquid standard gas. The high concentration standard gas used in the test gas must be a national certified standard material with an uncertainty of [%]=3. The typical standard gas dilution device is based on the above principle. According to the instrument to be tested, commercial pure nitrogen can be used as the dilution gas to dilute the high concentration gas standard material. It can prepare various standard gases with a content of 10-10. The actual technical performance is as follows!
1) Full range: (10/2000/3000/5000) mL/mn Select: 2) Flow rate value error limit: +0.5%:
3) Converter with extinguishing size: Chuang 08
JIG B012004
Verification certificate and verification result notification form 31 Verification form
Three items
External weakness and electronic control car
Wire resistance
Final edge egg degree
Cloud retreat
Repeat shrimp
Response time
NC. Conversion efficiency
Li Dian Shu
Non-treatment
3.2 Standard system notification form
Technical change
Entry Product discussion = 3 negative
large + FS
flame position ±
Default is the same as above, and the inspection does not include items: 5
Inspection station boundary
Appendix C
Inspection date:
Instrument name:
Inspection unit:
Inspection receipt:
Inspection standards Main device:
, appearance and power-on inspection:
:, insulation:
3. Insulation strength test:
JJG 80↓---2004
Verification record format
4. Small error, repeatability and response time and standard gas reporting
Main emission (R5D)
10,000, NO. Conversion efficiency
Gas concentration
*, floating spike
Verification conclusion:
Instrument with display/×10
Certification number
Column humidity
Factory number
Manufacturer
Verifier
Responsiveness time!
Conversion efficiency%
Verifier
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