QX/T 271-2015 in English

VALID

Interval of maintenance and intercomparison for Aethalometer based on optical attenuation method

Issued on:2015-07-28
Implemented on:2015-12-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $100.00
$97.00

Standard No:	QX/T 271-2015
Document status:	VALID
Title in English:	Interval of maintenance and intercomparison for Aethalometer based on optical attenuation method
Title in Chinese:	光学衰减法大气颗粒物吸收光度仪维护与校准周期
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2015-07-28
Implemented on:	2015-12-01
ICS Classification:	07.060-Geology. Meteorology. Hydrology
Chinese Classification:	A47-Meteorology
Professional Classification:	QX-Meteorology
Related Keywords:	optical attenuation method optical attenuation method introduction standard background core maintenance requirements maintenance items periodic requirements key parameters exception first special maintenance standard maintenance specifications
Related Topics:	atmospheric particles Photometer Attenuated absorption peak optical instrument absorption The absorption peak of gold particles gold particle absorption peak Particle size analyzer standard sample Atmospheric particulate matter Chemical absorbance Absorbance instrument Particle spectrometer The absorption peak of gold particles Spectrometers and Photometers Gold particle absorption peak Optical Enzyme Analyzer Approximate absorbance Gold particle absorption spectrum gold particle absorption Particle size analyzer standard sample Photometers and Spectrometers Gold particle absorption peak Particle size analyzer and spectrum Particle size meter material Summer School Chemistry Industrial Particle Analyzer Atmospheric particulate matter Optical rotation calibration optical maintenance Particle size analyzer Atmospheric particle meter Atmospheric absorption meter Total Atmospheric Particulate Matter Particle size analyzer recycling atmospheric particles Atmospheric adsorption instrument Average Particle Size Meter Calibration Particle size analyzer maintenance Particle size analyzer maintenance Conjugated systems and absorbance Standard material calibration cycle Physiograph atmospheric absorption spectrum income school QX Particle absorption photometer Particle photometer Oil Particle Analyzer Absorbance meter Atmospheric Particulate Matter Method Average Particle Size Meter Calibration light absorbance Optical density and absorption coefficient Atmospheric particulate matter total week of term week and date Absorbance standard Air particle size analyzer atmospheric absorption peak Gas particle size analyzer Absorbance value Spectrophotometry and Absorption Photometry Particle size Gas absorption meter Gas Absorber Decay Granularity Optical Calibration Ruler granularity of light Luminosity and Absorbance Atmospheric Absorption Peak atmospheric absorption peak Attenuated absorption peak Attenuation method air particles Particle Size Meter Fiber Absorption Peak Fluorescent Substance Spectrophotometric Granularity Absorbance calibration of spectrophotometers from different manufacturers Oxygen and explosion detector calibration cycle Laser Particle Size Analyzer Particle Absorption Rate Sulfide standard curve absorbance Balance self-calibration cycle Absorbance and concentration standard curve Absorbance photometry standard curve Direct reading spectrometer calibration cycle The absorbance of the biochemical instrument is greater than 19000 x-ray tube intensity attenuation Viscometer calibration cycle Gas Phase Molecular Absorption Spectrometer Calibration Mass and absorbance standard curve Particulate matter according to aerodynamic standards Chemical adsorption instrument charges Absorbance standard curve measured by microplate reader Potbelly Straw Calibration Optical cavity ring-down moisture meter calibration Instrument calibration cycle Spectrophotometry standard curve validity period Absorbance versus wavelength standard curve Calibration of electrostatic attenuation performance tester Particle Abrasion Resistance Meter Calibration absorbance standard equation Calibration method of absorption axis angle measuring instrument qx/t-264-2015

Introduction

Standard Background and Technology Evolution

QX/T 271-2015 is the first special maintenance standard for the optical attenuation method atmospheric particulate matter absorption photometer in the meteorological industry, filling the gap in the operation and maintenance specifications of aerosol optical property observation equipment. This standard inherits and develops the optical measurement principle of QX/T 168-2007, and combines the meteorological observation business practice from 2012 to 2014, and for the first time systematically stipulates the maintenance indicators for the entire life cycle of the instrument.

Comparison of core maintenance requirements

Maintenance items	Periodic requirements	Key parameters	Exception handling
Instrument inspection	Once a day	Flow deviation ≤10%	Immediate handling of error information
Optical test	Every 6 months	Special test strip verification	Must test after cleaning/repair
Flow calibration	Once a year	Comparison with standard flowmeter	Must calibrate after component replacement

Key technical points

Filter replacement mechanism

The standard innovatively proposes a double trigger mechanism: when there is a continuous negative measurement for 6 hours or the filter is used for 3 months, it is forced to be replaced. The actual measurement of the Beijing Meteorological Bureau shows that this mechanism can increase data efficiency by 23%.

Dust emergency response

Special regulations for sandstorm weather: A full set of cleaning must be completed within 6 hours after the process ends, including:
1. Dust removal on internal and external surfaces
2. Cleaning of cooling fans
3. Deep cleaning of the optical path measurement room

Implementation suggestions

Establish a digital operation and maintenance ledger: It is recommended to use QR code labels to manage filter membrane replacement records
Dynamic adjustment of calibration cycle: In the pollution season, the zero point detection cycle can be appropriately shortened to 1 month
Abnormal data correlation analysis: When the flow fluctuation is greater than 10%, the sampling pump and filter status should be checked simultaneously

More samples: DL/T 5154-2012 QC/T 942-2021 GB 50021-2001(2009)

Sample only — not a preview of QX/T 271-2015

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