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Calibration Specification for Volatile Organic Compounds Photo Ionization Detectors
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Basic data
| Standard ID | JJF 1172-2007 (JJF1172-2007) |
| Description (Translated English) | Calibration Specification for Volatile Organic Compounds Photo Ionization Detectors |
| Sector / Industry | Metrology & Measurement Industry Standard |
| Classification of Chinese Standard | A60 |
| Classification of International Standard | 07.180.01 |
| Word Count Estimation | 14,158 |
| Date of Issue | 2007-02-28 |
| Date of Implementation | 2007-05-28 |
| Quoted Standard | AQSIQ Announcement No. 41 of 2007 |
| Regulation (derived from) | AQSIQ Announcement No. 41 of 2007 |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine |
| Summary | This standard applies to monitoring air concentrations of volatile organic compounds VOCs photoionization detector calibration. |
JJF 1172-2007: Calibration Specification for Volatile Organic Compounds Photo Ionization Detectors
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Calibration Specification for Volatile Organic Compounds Photo Ionization Detectors
People's Republic of China National Metrology Technical Specifications
Volatile Organic Compounds
Photoionization detector calibration specification
Posted 2007-02-28
2007-05-28 implementation
The State Administration of Quality Supervision, Inspection and Quarantine released
VOC photoionization
Detector Calibration Specification
Comp
This specification by the State Administration of Quality Supervision, Inspection and Quarantine approved on February 28, 2007, and from
From May 28, 2007 into effect.
Focal point. the National Technical Committee on Environment stoichiometry
Drafting. Shanghai Institute of Measurement and Testing
This specification technical committee commissioned by the National stoichiometric environment responsible for interpreting
Drafters of this specification.
Cai Jianhua (Shanghai Institute of Measurement and Testing)
Zhengchun Rong (Shanghai Institute of Measurement and Testing)
table of Contents
1 Scope (1)
2 Overview (1)
3 Metrological characteristics (1)
3.1 Measurement range (1)
3.2 indication error (1)
3.3 Repeatability (1)
3.4 Response Time (1)
3.5 Drift (1)
4 calibration conditions (1)
4.1 Environmental conditions (1)
4.2 standards and other equipment (2)
5 calibration items and calibration methods (2)
5.1 Adjustment of the instrument (2)
5.2 Indication error (2)
5.3 Repeatability (3)
5.4 Response Time (3)
5.5 Drift (3)
6 calibration expression (3)
7 Recalibration interval (4)
Appendix A VOC photoionization detector calibration records (5)
Appendix B calibration certificate or calibration report calibration results content (6)
Appendix C calibration uncertainty assessment (7)
VOC photoionization detector calibration specification
1 Scope
This specification is applicable to the detection of air (non-mine operating environment) VOC concentrations of volatile organic
Compound photoionization detector calibration.
2 Overview
VOC photoionization detector (hereinafter referred to as the instrument) works. photoionization
(PID) is the use of a 10.6eV (or 11.7eV) photon energy of the UV lamp as a light source, this high-energy
UV radiation can make the air in almost all organic and inorganic ionization part, but still maintain the air basic ingredients
N2, O2, CO2, H2O and CO, CH4 is not ionized (ionization potential of these substances is much higher than 10.6eV or
11.7eV), the test substance into the ionization chamber, by UV light exposure, the original stable molecular structure is ionized, producing
Students positively charged ions and negatively charged electrons, under the influence of positive and negative electric field, weak current, a large current is detected formed
Small, we can know the content of the substance in the air.
Instruments mainly by the sampling system, photoionization section and display components.
Unless know exactly what kind of gas is detected, the instrument detected concentration is generally displayed showing the detected all
Total VOC content, expressed in VOC.
3 Metrological characteristics
3.1 Measuring range
Mole fraction X (VOC). 0 ~ 2000 × 10-6.
3.2 Indication error
Tolerance limit. ± 10% FS.
3.3 Repeatability
The relative standard deviation should not exceed 3%.
3.4 Response Time
Response time ≤20s.
3.5 Drift
3.5.1 Zero Drift
Instrument zero drift should not exceed one half of the allowed error limits.
3.5.2 Span drift
Instrument span drift should not exceed the tolerance limit of one-half.
Note. Due to calibrate the instrument and not only the instrument for determining eligibility or not, so that the above requirements are for reference only.
4 calibration conditions
4.1 Environmental conditions
4.1.1 Ambient temperature. (0 ~ 40) ℃.
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