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GB/T 26944.3-2011Tunnel environment detection equipment - Part 3: Visibility indicator (English PDF)

隧道环境检测设备第3部分：能见度检测器

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 19, 2011

Implementation date

May 1, 2012

Scope

GB/T 26944.3-2011 is the English-translated version of 隧道环境检测设备第3部分：能见度检测器.

GB/T 26944.3-2011 is the Chinese standard "Tunnel environment detection equipment - Part 3: Visibility indicator". Its scope clause reads: This section GB/T 26944 specifies the tunnel visibility detector product classification, technical requirements, test methods, inspection rules, marking Chi, packaging, transport and storage.

This section applies to highways and urban roads in the tunnel with environmental testing equipment, environmental testing equipment with other tunnels can refer to use. Its clauses include technical requirements.

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Document preview — GB/T 26944.3-2011

National Standard of the People's Republic of China

ICS: 93.080.30
Classification: R 80

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Technical requirements
3.1 The main technical indicators
3.2 For the environment
3.3 Materials and Appearances
3.4 Functional requirements
3.5 automatic compensation
3.6 anti-jamming performance

1 Scope

This section GB/T 26944 specifies the tunnel visibility detector product classification, technical requirements, test methods, inspection rules, marking

Chi, packaging, transport and storage.

This section applies to highways and urban roads in the tunnel with environmental testing equipment, environmental testing equipment with other tunnels can refer to use.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 26944.1-2011 tunnel environment testing equipment - Part 1. General

3 Technical requirements

3.1 The main technical indicators

3.1.1 Measuring range

(0 ~ 0.015) m-1.

3.1.2 Accuracy

± 0.0002m-1.

3.1.3 Output

Shall comply with GB/T 26944.1-2011 requirements in 3.3.5.

3.2 For the environment

Shall comply with GB/T 26944.1-2011 in 3.1 requirements.

3.3 Materials and Appearances

Shall comply with GB/T 26944.1-2011 in 3.2 requirements.

3.4 Functional requirements

Shall comply with GB/T 26944.1-2011 in 3.3 requirements.

3.5 automatic compensation

Contamination and should have a long-term drift automatic compensation to maintain visibility detector detection accuracy.

3.6 anti-jamming performance

In ambient light interference and other environmental parameters, visibility detector should be working properly, a false alarm occurs.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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