JJG 968-2002 Flue Gas Analyzer Verification Procedure JJG968-2002 Standard download decompression password: www.bzxz.net
This procedure applies to the initial verification, subsequent verification and in-use inspection of flue gas analyzers.

National Metrology Verification Regulation of the People's Republic of China JJG 968—2002
Flue Gas Analyzers
2002-Q1-15 Issued
2002-07-01 Implementation
Issued by the General Administration of Quality Supervision, Inspection and Quarantine JIG 96—2D02
Verification Regulation of Flue Gas Analyzers
JJG968—2002
This regulation was approved by the General Administration of Quality Supervision, Inspection and Quarantine on April 15, 2002 and implemented on July 1, 2002
Responsible unit: National Environmental Chemical Metrology Technical Committee Main drafting unit: Shandong Provincial Environmental Monitoring Center National Standard Material Research Center
Additional drafting unit: Renlian Zhonghuan Instrument Co., Ltd. This regulation is entrusted to the National Environmental Chemical Metrology Technical Committee. The main drafter of this regulation:
Jin Lisha
Chen Yonghua
Participating drafter:
Wang Xueli
JJG 968—2002
(Shandong Environmental Monitoring Center)
(National Center for Standard Materials Research)
(Dalian Zhonghuai Instrument Co., Ltd.)Scope
3 Metrological performance requirements
3.1 Indication error
3.2 Reproducibility
3.3 Response time
3.4 ​​Stability
4 General technical requirements
Appearance and structural requirements
4,2 General flow wall
4.3 Insulation resistance
5 Salt meter and its control
Test properties
Test items
5.3 Test method
Test result processing
5.5 Test cycle
A Test certificate (internal qualification form
Appendix B Flue gas analyzer test record
JJG 968——202
1 Scope
JJG 8—2002
Verification Procedure for Flue Gas Analyzer
This regulation is applicable to the initial verification, subsequent verification and in-use inspection of flue gas analyzers (hereinafter referred to as analyzers).
The analyzer is mainly used to measure the concentration of harmful gases such as oxides, nitrogen oxides, carbon monoxide and oxygen in the flue gas. The filter can be selectively configured to measure one or more gas components: the analyzer consists of two parts: the gas circuit system and the circuit system. The working principle is to pump the corresponding gas through the sampler to the sensing chamber, and the auxiliary output of the sensor is converted into the concentration of the measured gas through the electronic circuit to release the analog signal. 3. Measurement performance requirements
3.1 Unrecognition error
The indication error does not exceed ±5%
3.2 Repeatability
Repeatability does not exceed 2%
3.3 Response time
Response time does not exceed 90s.
3.4 ​​Stability
The indication value changes within 1 hour and does not exceed 5%.
4 General technical requirements
4.1 Appearance and structural requirements
4.1. The nameplate of the analyzer should be marked with the product name, model, factory serial number, manufacturing date, manufacturer's name, manufacturing license and acceptance, and there should be a manual. 4.1.2 The sample pipe is only included, and there is no possibility of hindering the machine from working. Each regulator rotates flexibly and is accurately positioned. Each fixing should be loose. After power on, the digital display is complete and clear: 4.2 Maximum flow
Adjust the flow to the flow meter as far as possible to reach the flow specified in the manual. 4.3 Insulation resistance is not included in the power supply analysis of the passenger flow, and the instrument control card of the instrument includes: initial calibration, subsequent calibration and in-use inspection. 5. [Calibration conditions
5.1.1 Calibration environmental conditions
(11 Temperature: 15 - 35T -
(2) Temperature: small and large S energy H
J.IG: 968-2003
【3H source voltage: A22n (1±device).
5.[.2 Calibration equipment
Preferred gas: nitrogen oxides, nitrogen oxides, and oxygen. The calibration room should not exceed 2% (=3):
(2) Zero calibration gas: clean air:
(3) Electric 7 displacement meter: 0.01s
Carbon dioxide, oxygen and other standard substances: the degree of its fall () air flow control release, the flow is fast and the setting is good. The flow range should be able to fully cover the instrument being tested, and there is a gradual release meter,
(5) Insulation tester: 500V, 10 slow
5.2 Verification items IE
Verification items and as shown in Table 1
Table丨Verification items: List
Specification lock items
Appearance and average cost requirements
Display of interest
Repetitive source
Response time
Stability
Fan training group
Note 1: + "To prove frequency,
Ancient drink shock
" Consider not buying a rough determination and
Natural interest determination
Promote the use of inspection
Note 2: After the safety and editing of the product Liu's power, only the performance book is calculated when the age is large, and the start-up inspection is effective. The hot and cold adjustment items are operated 5.3 Inspection square up
5.3.1 External 5.3.2 Connect the flowmeter to the air inlet, turn on the analyzer on the gas stand, adjust the flow blade to flow, and observe whether the flow specified in the instruction manual can be reached: 5.3.3 After the analyzer is calibrated, add standard gas with 20%, 50% and 0% of the full range respectively. Each time the gas is passed through, report the indicated value of each method: Formula (1) is used to calculate the indicated value of different limit values ​​2. 4:5: Total error of the liquid value, ——3 c. The concentration of standard gas is
JJG968—2002
×100%
The maximum indication error is 4, but the maximum indication error of the analyzer is 5.31 years. After the analyzer is calibrated to zero, measure the special gas of about 100% accuracy, wait for the indication value to be determined, and get the measurement result: then go back and step 6 times in reverse order: Repeatability is expressed as relative standard deviation, and the value of each parameter can also be calculated separately by formula (2?,
[e -ey
×100%
Wherein: 5.
Relative standard deviation:
the average value of 6 measurements;
c, the measured value of the time;
number of measurements, month=6
5.3.5 Interval
Analysis and calibration of zero point, the first element is about 80% of the full volume, read the initial value of the instrument after it stabilizes, after the instrument calls zero, call through the above standard gas: at the same time, record with a stopwatch when the instrument reaches 90% of the stable initial value, multiply the above value by 3 times, and take the arithmetic value as the response time of the instrument. 5.3.6 Analysis and calibration of the device: After the zero point is eliminated, 80% of the standard gas is used. The initial value of the calibration band is read separately: Let the device run continuously for 1 hour, and let the standard gas in for 15 minutes each time. At the same time, take the total indication value, read the stable indication value once for each standard gas. The value that deviates the most from the initial value is calculated according to formula (3): The initial value of the device is: The maximum deviation from the initial value is: 5. Verification treatment: After the verification is confirmed to be in compliance with the requirements of this regulation, a verification certificate will be issued: If it does not meet the requirements of this regulation, a verification result notice will be issued, and annotated. Qualified items
3.5 Verification cycle
Analysis of the verification cycle
No more than 1 year:
Appendix A
Verification environment conditions: Warm and healthy
Verification technical requirements:
Verification items
Appearance change requirements
Maximum flow rate
Repeatability
Response time
General form
Technical requirements
JIG968—2H2
Verification certificate (inside page) format
Relative accuracy
Verification results
Qualified station
NO,Light sensor
Transmitter
Transmitter
Appendix B
Inspection unit
Instrument name
Manufacturer name
Calibration temperature
1. Appearance average water content
2. Maximum flow rate
3. Indication error
Standard name, change
Standard, name, change!
5.Response time
Standard gas name, concentration
JJG 968—2002
Flue gas analyzer calibration record
Analyzer model
Factory number
Indicator 1
Xiaobai 2
Indicator 2
Indicator multiple 4
Response time/s
Indicator error (3,)
Indicator package 6
Accuracy difference
6.Stable value
Standard gas concentration
7.Insulation resistance:
JJG 968—2002wwW.bzxz.Net
15mlins
3Wraia
Inspector
Inspection date
Stability (,)
Inspector
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