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JJF 1800-2020Calibration specification of aerosol photometers (English PDF)

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Issued by

State Administration for Market Regulation Administrative organization

Level / Type

National · Mandatory

Issue date

January 17, 2020

Implementation date

April 17, 2020

Scope

JJF 1800-2020 (Calibration specification of aerosol photometers) is available as an English-translated PDF.

JJF 1800-2020 is the Chinese standard "Calibration specification of aerosol photometers".

Its scope clause reads: This Specification applies to the calibration of light scattering principle aerosol photometers with a measurement range of (0.01~100) µg/L. The aerosol photometers with other measuring ranges can be calibrated with reference to this Specification.

Its clauses include terms; overview; metrology characteristics; calibration conditions; calibration items and calibration methods; calibration result expression; recalibration time interval.

It was issued by the State Administration for Market Regulation Administrative organization on 2020-01-17 and took effect on 2020-04-17.

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Document preview — JJF 1800-2020

National Standard of the People's Republic of China

Issued by: State Administration for Market Regulation Administrative organization

Introduction...5
1 Scope...6
2 Terms...6
3 Overview...6
4 Metrology characteristics...7
5 Calibration conditions...7
5.1 Environmental conditions...7
5.2 Metrology standard instruments...8
6 Calibration items and calibration methods...8
6.1 Preparation before calibration...8
6.2 Calibration items...8
7 Calibration result expression...12
7.1 Calibration record...12
7.2 Processing of calibration results...12
8 Recalibration time interval...13

1 Scope

This Specification applies to the calibration of light scattering principle aerosol photometers with a measurement range of (0.01~100) µg/L. The aerosol photometers with other measuring ranges can be calibrated with reference to this Specification.

2 Terms

PAO-4 aerosol

Aerosol refers to a colloidal dispersion system formed by solid or liquid small particles dispersed and suspended in a gas medium. It is also called as gas dispersion system. Its dispersion phase is solid, liquid or solid-liquid mixture. PAO-4 aerosol in this

Specification refers to polydisperse aerosol, which takes poly-alpha-olefin oil (PAO) with a kinematic viscosity of 4m2/s as the generating medium and is generated by the fog mixing device of the aerosol photometer.

3 Overview

Aerosol photometer (hereinafter referred to as the instrument) is an instrument used to measure the leakage rate of high-efficiency filters and the leakage rate of high- efficiency filtration systems installed with high-efficiency filters.

4 Metrology characteristics

4.1 Sampling flow indication error. no more than ±5%.

4.2 Sampling flow repeatability. not more than 2%.

4.3 Sampling flow stability. sampling flow is not more than 5% within 1h.

5 Calibration conditions

5.1 Environmental conditions

5.1.1 Temperature. (15~30)°C. Relative humidity. <=85%.

5.2 Metrology standard instruments

5.2.1 Precision aerosol photometer. the maximum allowable error of mass

concentration does not exceed ±10%;

5.2.2 Flow standard device. the measurement range is (0~50)L/min; the maximum allowable error does not exceed ±1.0%.

6 Calibration items and calibration methods

6.1 Preparation before calibration

Connect the calibrated instrument, precision aerosol photometer and aerosol fog mixing device as required. According to the use requirements of each equipment, the normal operation of preheating shall not be less than 10min.

6.2 Calibration items

6.2.2 Flow repeatability

According to the connection method in 6.2.1, read the standard flow value after the instrument is stable. Repeat the measurement 6 times. Calculate the sampling flow repeatability according to formula (2).

7 Calibration result expression

7.1 Calibration record

Refer to Annex D for the calibration record format.

7.2 Processing of calibration results

Calibration results shall be reflected on the calibration certificate or calibration report.

The calibration certificate or report includes at least the following information.

8 Recalibration time interval

The recalibration time interval of the instrument shall be determined by the user according to the usage of the instrument, the performance of the instrument itself, and so on.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 13 pages — is available in the English PDF.

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