Standard number: QX/T 509-2019
Standard name: GRIMM 180 particle concentration monitor calibration specifications
English name: Specifications for GRIMM 180 particle concentration monitor calibration ||
tt||Standard format: PDF
Release time: 2019-09-30
Implementation time: 2020-01-01
Standard size: 1155K
Standard introduction: GRMM180 particle concentration monitor is used to measure the mass concentration and number concentration of particles of different particle sizes in the atmosphere. In order to ensure the accuracy and comparability of the observed data, the instrument needs to be calibrated. This standard is specially formulated to standardize the calibration of GRIMM180 particle concentration monitor. This standard specifies the instrument principle and composition, technical indicators, conditions, methods and cycles for the calibration
of GRIMM180 particle concentration monitor. This standard applies to the initial calibration, subsequent calibration and calibration after repair of GRIMM180 particle concentration monitor. 2 Normative reference documents
The following documents are indispensable for the application of this document. For all reference documents with dates, only the versions with dates are applicable to this document
. For any undated referenced document, its latest version (including all amendments) shall apply to this document QX/T173-2012GRMM180 Methods for measuring PMw, PM1: and PM1 3 Terms and definitions
The following terms and definitions apply to this document
Inhalable particles
PNIe
Aerosol particles with aerodynamic diameter less than or equal to 10cm
[GB/T311592014, definition 3.6]
Fine particles
PM,s
Aerosol particles with aerodynamic diameter less than or equal to 2.5m
[GB/T311592014, definition 3.7
Submicron particles
PM,.
Aerosol particles with aerodynamic diameter less than or equal to 1gm
GB/T311592014, definition 3.8]
This standard specifies the instrument principle and composition, technical indicators, conditions, methods and cycles for the calibration of the GRIMM 180 particle concentration monitor. This standard is applicable to the initial calibration, subsequent calibration and calibration after repair of the GRIMM 180 particle concentration monitor.

ICS07.060
Meteorological Industry Standard of the People's Republic of Chinawww.bzxz.net
QX/T509—2019
Specifications for GRIMM180particle concentration monitor Calibration Industry Standard Information Service Platform
Release on 2019-09-30
China Meteorological Administration
Implementation on 2020-01-01
Industry Standard Information Service Platform
Normative Reference Documents
Terms and Definitions
Instrument Principle and Composition
Calibration Technical Indicators
Calibration Conditions
6.1 Calibration Environment
6.2 Calibration Equipment, Facilities and Materials
7 Calibration Methods
General Principles
Preparation before Calibration
Appearance Inspection
Instrument Internal Inspection and Cleaning
Gas Tightness Inspection of Gas Circuit
Instrument Operation Inspection
Comparison before Calibration
Flow rate check and adjustment
Laser voltage check and adjustment
Filter check
Instrument calibration
Basic requirements
Flow rate calibration
Validity test of adjustment of mass concentration and number concentration of particulate matter
Comparison after calibration
7.4 End of calibration
8 Calibration cycle
Appendix A (informative appendix)
Appendix B (informative appendix)
References·
Grimm180 particulate matter monitor calibration record template Calibration certificate
QX/T509—2019
Industry standard information service platform
This standard was drafted in accordance with the rules given in GB/T1.1—2009. QX/T509-2019
This standard is proposed and managed by the Sub-Technical Committee on Atmospheric Composition Observation, Forecast and Warning Services (SAC) TC540/SC1 of the National Technical Committee for Standardization of Climate and Climate Change.
The drafting units of this standard are: Meteorological Observation Center of China Meteorological Administration, Beijing Meteorological Bureau, China Meteorological Science Research Institute, Hubei Meteorological Bureau, Beijing Huayun Dongfang Detection Technology Co., Ltd., and Beijing Maite High-tech Technology Co., Ltd. The main drafters of this standard are: Zhang Xiaochun, Zhao Fei, Wang Yao, Ouyang Jun, Yang Suxia, Wang Donghua, Liu Wen, Tong Hua, Li Weichao, Jing Junshan, Zhao Peitao, Zhao Peng, Quan Linlin, Sun Junying, and Zhang Xiaodian. Industry Standard Information Service Platform
QX/T509-—2019
GRIMM180 particle concentration monitor is used to measure the mass concentration and number concentration of particles of different particle sizes in the atmosphere. To ensure the accuracy and comparability of the observation data, the instrument needs to be calibrated. This standard is specially formulated to standardize the calibration of the GRIMM180 particle concentration monitor.
Industry Standard Information Service Platform
1 Scope
GRIMM180 particle concentration monitor calibration specification QX/T509—2019
This standard specifies the instrument principle and composition, technical indicators, conditions, methods and cycles for the calibration of the GRIMM180 particle concentration monitor.
This standard applies to the initial calibration, subsequent calibration and calibration after repair of the GRIMM180 particle concentration monitor. 2 Normative reference documents
The following documents are indispensable for the application of this document. For all dated reference documents, only the dated version applies to this document. For any undated referenced document, its latest version (including all amendments) shall apply to this document QX/T173—2012 GRIMM180 Methods for measuring PM10, PM2.5 and PM 3 Terms and definitions
The following terms and definitions apply to this document. 3.1
Inhalable particulate matter
inhalableparticle
Aerosol particles with an aerodynamic diameter less than or equal to 10um. Information service platform
[GB/T31159—2014, definition 3.6]］3.2
Fine particulate matter
finepaaticis
Aerosol particles with an aerodynamic diameter less than or equal to 2.5m. 3.3
Submicron particles
submicronparticle
Aerosol particles with aerodynamic diameter less than or equal to 1um [GB/T31159-2014. Definition 3.8]
ParticulatemassconcentrationThe total mass of particles in a unit volume of air. Note: Commonly used units are milligrams per cubic meter (mg/m2) and micrograms per cubic meter (ug/m2). 3.5
particulatenumberconcentrationParticulatenumberconcentration
The number of particles in a unit volume of air. Note: Commonly used units are pieces per cubic meter (pieces/m) and pieces per cubic centimeter (pieces/cm). 1
QX/T509—2019
Instrument principle and composition
The working principle, composition and technical indicators of the GRIMM180 particle concentration monitoring instrument are specified in Chapter 4 of QX/T173—2012. 5 Calibration technical indicators
The technical indicators that should be met by the calibration of the GRIMM180 particle concentration monitor are shown in Table 1. GRIMM180 particle concentration monitor calibration technical index requirements Table 1
Technical index
PMio, PM2.5, PMi..Mass concentration
Particle number concentration
Relative humidity
Atmospheric pressure
Refers to the maximum allowable error between the instrument to be calibrated and the transfer standard instrument 6 Calibration conditions
6.1 Calibration environment
Maximum allowable error
±3μg/m (≤500μg/m), ±5% (>500μg/m2) ±5% (>1/cm)
Set flow value ±5%
6.1.1 The ambient temperature range is 20℃ ± 5℃, and the relative humidity range is 20% to 85%. 6.1.2 The power supply should have good grounding. The grounding resistance should not be greater than 42, and it is advisable to be equipped with an uninterruptible power supply with voltage stabilization and filtering functions. 6.1.3 The workplace should be clean and free of inflammable, explosive and highly corrosive substances, strong mechanical vibration and electromagnetic interference. 6.1.4 The test operation environment should not generate particulate pollution. Standard Information
6.2 Calibration Equipment, Facilities and Materials
The standard instrument should have the same functions, measuring elements and number of channels as the instrument to be calibrated; the allowable error between the mass concentration and number concentration and the standard instrument of the previous level should not be greater than ±2.5%. 6.2.2 The calibration tower should be able to continuously and stably provide airflow to evenly suspend the particles, equipped with calibration bodies, air compressors and control units; it should be able to control the injection frequency of particles, the air supply of the air compressor should not be less than 40Lmin, and it should have air and overpressure protection functions: the flow rate of the suspended airflow should be within the range of (10±0.3)L/min, and the relative humidity should not be greater than 40%. 6.2.3 The standard particles should be polydisperse particles, and the particle size distribution should be able to cover the effective measurement particle size range of the instrument. 6.2.4 The range of the standard flow meter should not be less than 2.5L/min, and the allowable error should not be greater than ±1%. 6.2.5 The filtration efficiency of the filter for particulate matter should not be less than 99%. The pressure resistance should not be less than 0.1MPa. 6.2.6 The gas circuit leak detection device should be composed of a pressure gauge, a rubber tube, an inflatable rubber ball, a three-way joint and an exhaust valve. The range of the pressure gauge should not be less than 40kPa, and the resolution should not be less than 0.5kPa. 6.2.7
The calibration software of the particle concentration monitor should have the functions of instrument parameter configuration, particle injection time and frequency control, threshold automatic adjustment, data acquisition and output, and graphic display. QX/T509—2019
6.2.8 It should have other auxiliary facilities such as gas circuit connecting pipes and joints, temperature and humidity simulators, dry clean air or dry clean compressed air, deionized water, cotton wool, dust-free wiping paper, screwdriver tools, etc. 7 Calibration method
7.1 General principles
7.1.1 It should comply with the provisions of 7.1 of QX/T1732012. 7.1.2 The relevant information of the calibration process should be recorded in detail and accurately, including the start and end time, operation content, etc. 7.2 Preparation before calibration
7.2.1 Appearance inspection
7.2.1.1 The appearance of the instrument is good, and there should be no obvious damage on the outer surface. 7.2.1.2 The instrument identification is complete, and should have the name, model, serial number, manufacturer name, production date and other identification. 7.2.1.3 The structure of the instrument is complete, all parts are complete, and the connection is reliable. 7.2.2 Internal inspection and cleaning of the instrument
7.2.2.1 Open the top cover of the instrument, check and use dry and clean compressed air to carefully clean the dust inside the instrument. 7.2.2.2 Check the various groups of components and connections inside the instrument to ensure that the connections between the components are tight and reliable. 7.2.2.3 Check the internal gas filter of the instrument. If it turns yellow or black or is seriously contaminated, it should be replaced. 7.2.2.4 Check the internal gas pipeline of the instrument. There should be no leakage. Clean it if necessary. 7.2.2.5 Clean the laser measurement chamber with dry and clean air with a certain pressure (not less than 0.1MPa). 7.2.2.6 Use deionized water, cotton wool and dust-free wipes to carefully clean the laser absorption trap and the reflector surface to avoid scratching. 7.2.3 Check the air tightness of the gas circuit
7.2.3.1 Connect the rubber tube outlet of the gas circuit leak detection device to the air inlet of the instrument host, and block the outlet of the filter inside the instrument. 7.2.3.2 Increase the pressure to about 0.01MPa, close the exhaust valve, wait for 20, and the pressure should not be less than 0.008MPa. 7.2.4 Check the operation of the instrument
Correctly connect the instrument and related components, plug in the humidity simulator, turn on the power switch of the instrument, and the instrument should be able to pass the self-test without 7.2.4.1
abnormal alarms and error messages.
7.2.4.2 The instrument operation panel should be able to operate normally, and the display part should be clear; the sampling pump should operate normally without abnormal sounds; the vacuum pressure display of the dehumidification pump should be (40~60)psi (pounds per square inch + standard week) when starting. 7.2.4.3 The transfer calibration instrument, air compressor, calibration tower and supporting facilities, computers and calibration parts should be able to work normally. 7.2.5 Comparison before calibration
7.2.5.1 Check the time of the instrument to be calibrated, the transfer standard instrument and the data acquisition computer and keep them synchronized; set the time interval of instrument data output to be consistent.
7.2.5.2 Keep the air inlet height of the instrument to be calibrated and the transfer standard instrument consistent, the error should be less than 1cm, and the distance between the air inlets of the instruments The distance should be less than 1m. The air flow around the instrument should be unobstructed. 7.2.5.3 Put the instrument to be calibrated and the transfer standard instrument in the measuring state, and run the data acquisition software synchronously. 7.2.5.4 Under laboratory environmental conditions, keep the instrument running continuously for not less than 6 hours. 3
QX/T509—2019
7.2.5.5 Compare and analyze the measurement results of the instrument to be calibrated and the transfer standard instrument. If they meet the technical indicators specified in Chapter 5, the instrument to be calibrated does not need to be calibrated; if the mass concentration, number concentration and flow rate exceed the technical indicators specified in Chapter 5, they should be calibrated in accordance with the provisions of this standard. If the temperature, humidity and atmospheric pressure exceed the technical indicators specified in Chapter 5, the sensor should be checked or replaced. 7.2.6 Flow Inspection and adjustment
7.2.6.1 After the instrument enters the measurement state, connect the standard flow meter in series to the air inlet of the main unit of the instrument to be calibrated. The stabilization time shall not be less than 2 minutes, and read the flow values ​​of the standard flow meter and the instrument to be calibrated. 7.2.6.2 Adjust the flow of the instrument to be calibrated to within the range of 1.14L/min~1.26L/min. 7.2.7 Laser voltage inspection and adjustment
7.2.7.1 Record and check the voltage difference when the instrument light source is turned on and off, the number of particles when the light source is turned on and off during the instrument self-test, and the high and low current parameters of the light source
7.2.7.2 Adjust the high and low voltages of the light source so that the measurement deviation of the two PM2.5 channels is no more than ±2.5%. 7.2.8 Filtration Instrument inspection
7.2.8.1 Connect the filter to the air inlet of the instrument host, stabilize for no less than 2 minutes, and read the PM1e mass concentration value displayed on the instrument. 7.2.8.2 If PM. exceeds 10ug/m or the indication is unstable, the air tightness of the internal pipelines, related components, and gas circuits of the instrument should be inspected and handled.
7.3 Instrument calibration
7.3.1 Basic requirements
7.3.1.1 The instrument to be calibrated should pass the inspection and test specified in 7.2. 7.3.1.2 Adjust the flow rate of suspended gas in the calibration tower to be within the range of (10±0.3)L/min. 7.3.1.3 The standard particles added to the standard particle bottle on the calibration tower should not exceed 80% of the volume of the particle bottle. 7.3.1.4 The connection between the air outlet of the calibration tower and the air inlet of the transfer standard instrument and the instrument to be calibrated should be of the same length and kept vertical. 7.3.2 Flow calibration
7.3.2.1 The stable operation time of each instrument should not be less than 10 minutes. 7.3.2.2 Adjust the flow rate of the transfer standard instrument to within the range of .17Lm~1.23L/min. 7.3.2.3 Adjust the flow rate of the instrument to be calibrated to be consistent with the flow rate of the transfer standard instrument. 7.3.3 Adjustment of mass concentration and number concentration of particulate matter 7.3.3.1 Adjust the readings of all channels of the instrument to be calibrated to be consistent with those of the transfer standard instrument. 7.3.3.2 Inject standard particulate matter into the calibration tower and stabilize for about 1 minute. 7.3.3.3 Check whether the measurement signal value of the transfer standard in the PM2.5 high voltage channel and PM2.5 low voltage channel is close to 40000. If the value is less than 32000, repeat 7.3.3.2 and 7.3.3.3. 7.3.3.4 Compare the measurement deviations of the two PM2.5 channels corresponding to the instrument to be calibrated and the transfer standard instrument, and adjust the high and low laser voltages of the instrument to be calibrated so that the measurement deviation is no more than ±2.5%. 7.3.3.5 Check and confirm again whether the standard particles in the standard particle bottle on the calibration tower are sufficient. If insufficient, add them in time. 7.3.3.6 Under the control of the calibration software, the system will automatically control the injection times and stabilization time of the standard particles, and adjust the reading value of each channel so that the measurement deviation of the corresponding channels of the instrument to be calibrated and the transfer standard instrument is no more than ±2.5%. 4
7.3.4 Validity test
7.3.4.1 Inject standard particles into the calibration tower for no less than 5 times and wait for about 1 minuteQX/T509—2019
7.3.4.2 The time for the instrument to be calibrated and the transfer standard instrument to perform simultaneous measurements of mass concentration and number concentration of PM1, PM2.5, PM. should not be less than 20 minutes. After the measurement, a comparison chart of the two should be given. 7.3.4.3 In the data of 7.3.4.2, the starting time is when the number concentration of particles in the first channel is close to 1000/cm, and the data of the next 15 minutes are selected for deviation analysis. If the deviation between the measurement results of the instrument to be calibrated and the transfer standard instrument is no more than ±2.5%, the calibration validity test is passed and the calibration is completed; otherwise, the reading value of the corresponding channel should be adjusted, and 7.3.4.1 to 7.3.4.3 should be repeated until the deviation is no more than ±2.5%.
7.3.5 Comparison after calibration
7.3.5.1 After the calibration instrument is calibrated, it should be compared with the transfer standard instrument or the calibrated instrument of the same type. If the measurement result deviation is greater than 10%, it should be recalibrated.
7.3.5.2 Synchronous comparison should be carried out in accordance with the provisions of 7.2.5 or using a calibration tower. When using a calibration tower for comparison, the top cover of the calibration tower should be opened, and the filter on the top of the calibration tower should be removed or replaced with a large-pore filter. 7.3.5.3 The continuous operation time of the instrument comparison should not be less than 6 hours. 7.4 End of calibration
7.4.1 Analyze the calibration and comparison data, make calibration records, see Appendix A for the calibration record template, and prepare a calibration certificate, see Appendix B for the certificate.
Report, etc.
Organize and archive all calibration-related materials, including record sheets, threshold values ​​of each channel, comparison data and graphs before/after calibration, and calibration reports. 7.4.3 Clean the laser measurement chamber of the instrument to be calibrated according to the method in 7.2.2.5. 8 Calibration cycle
The traceability cycle of the transfer standard instrument should not exceed 3 years; the calibration cycle of the instrument should not exceed 12 months. When the instrument is repaired or the measurement results are in doubt, it should be calibrated in time. 5
QX/T509—2019
For the calibration record template, please refer to Table A.1.
Appendix A
(Informative Appendix)
Grimm180 Particle Monitor Calibration Record Template Table A.1
Transfer standard instrument
Serial number
Grimm180 particle monitoring instrument calibration record template Operator
To be calibrated
Light chamber cleaning operation
Optical measurement cell and laser parameters
Co_h (zero particle count when laser is emitted) Co_d (particle count when laser is turned off) La_I (current of low-energy laser)
La_h (current of high-energy laser)
Adjust the high laser E point
Adjust the low laser O point
Inspection and related operations:
Laser adjustment
Serial number
Parameter value before cleaning
Increase
Increase
Record of threshold values ​​of each channel before calibration
0.285gμm
Record of reading values ​​of each channel after calibration
Parameter value after cleaning
Decrease
Decrease
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