QX/T 536-2020 in English

VALID

Test method for foreword scattering visibility meter

Issued on:2020-01-21
Implemented on:2020-05-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	QX/T 536-2020
Document status:	VALID
Title in English:	Test method for foreword scattering visibility meter
Title in Chinese:	前向散射式能见度仪测试方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-01-21
Implemented on:	2020-05-01
ICS Classification:	07.060-Geology. Meteorology. Hydrology
Chinese Classification:	A47-Meteorology
Professional Classification:	QX-Meteorology
Related Keywords:	test items indication error test test method test cabin test report preparation response time test
Related Topics:	About scattering Eighteen Angle Scatterometer angular scatterometer Directional colorimeter Wu Xiangqian Scattering instrument Frontiers of Chemistry altimeter method Altimeter Test Method small scatterometer forward scatter instrument Backscatter vs Backscatter Multi-angle light scattering instrument backscatter mode .backscatter mode Diffuser performance Seated Forward Bend Test Sensitivity Tester Sensitivity Tester Divergent Directional scattering film Visibility meter Scattering tester Test direction instrument Scattering instrument Ray Scattering Instruments forward primer instrument scattering u6 forward primer Eighteen angle light scattering instrument Fluorescence before and after scattering ratio Forward environmental protection How to use scattering How to use the flow meter forward and backward primers Angular Light Scattering Meter visibility complex scattering The current energy spectrometer can analyze forward scatter and back scatter Hydrometer Spectrometer test sample preparation method Wavefront Tester Tester test degree Directional xrd test method How about the scattering intensity multi-angle scatterometer Salt Meter Test Method Dual forward angle scattered light Yoshimi The current spectrometer directional inscattering Integrated Light Scattering Meter Density meter test method looseness test method backscatter backscatter forward scatter coefficient Motor direction indicator Cutting-edge testing equipment Cutting-edge testing equipment forward scattering angle Before and after particle size dispersion Instrument Testing Frontier Analysis Electron Scatterer Test Light Scattering Direction Test Instrument Density Dispersion Meter Energy Scatterer dust meter forward scattering Laser Visibility Meter Common testing methods and instruments for density References to visibility meters Forward scatter visibility meter observation Common instrumental analysis methods Intelligent sulfur analyzer test method Convenient water activity tester measurement method Water flow calorific value meter test method Scatter Visibility Test Visibility detector Transmission Visibility Meter Calibration How to measure dispersion Scattering equipment testing qx/t-2020 qx/t 567-2020 Dispersion detection method Cooling method of desktop sugar meter no536

本标准规定了前向散射式能见度仪的测试项目、测试条件、仪器设备、测试步骤、数据处理及测试报告等。本标准适用于前向散射式能见度仪的实验室测试。

Introduction

Analysis of the core content of the standard

Forward scatter visibility meter is a key equipment for meteorological observation. Its testing method directly affects the reliability of visibility data in the fields of aviation and transportation. The QX/T536-2020 standard has established a complete test technology system:

Test dimensions	QX/T536 requirements	GJB6298 comparison
Measurement range	10-30000m	10-50000m
Indication error	±50m(≤500m) → ±20%(>1500m)	±30m(≤500m)
Response time	Dual mode test	Only rise time is required

Key Technical Points

1. Test Environment Control

The standard strictly stipulates the laboratory environment parameters: temperature (20±5)℃, humidity ≤85%RH, and real-time monitoring through temperature and humidity sensors to ensure that the test conditions meet the benchmark requirements of GB/T35223-2017.

2. Core test items

Indication error test: 9 characteristic test points (50m-30000m) are used to simulate the gradual change of visibility in the test cabin, and the transmissometer is used as the standard (error ≤5%).
Response time test: An innovative rise/fall dual-mode test is proposed, through the combination of scattering plate and sunshade plate, and an electronic stopwatch (error ±0.05s) is used for accurate timing.

Analysis of implementation difficulties

Test cabin calibration case

A provincial metrology agency found during implementation that when the visibility is >500m, the uniformity in the cabin must be controlled within 5%. By adding a multi-axis stirring fan and a laser particle counter, the fluctuation was reduced from 8% to 3.5%, meeting the requirements of Table 2 of the standard.

Analysis of Standard Evolution

Compared with the GJB6298-2008 military standard, the main progress of QX/T536-2020 is:
1. Add the descent response time test item
2. Refine the error assessment method when visibility>1500m
3. Introduce the dynamic test mode (Article 6.4.2)

Key points for test report preparation

According to the requirements of Chapter 8, the complete report should include:
- Test curve chart (visibility change trend)
- Raw data comparison table of the standard instrument and the device under test
- Environmental parameter records (temperature and humidity time series data)

More samples: QC/T 942-2021 JGJ 94-2008 JJG 21-2008

Sample only — not a preview of QX/T 536-2020

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