GB/T 21254-2017 in English

VALID

Breath alcohol analyzer

Issued on:2017-12-29
Implemented on:2018-07-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $370.00
$359.00

Standard No:	GB/T 21254-2017
Document status:	VALID
Title in English:	Breath alcohol analyzer
Title in Chinese:	呼出气体酒精含量检测仪
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2017-12-29
Implemented on:	2018-07-01
Superseding:	GB/T 21254-2007 Breath alcohol analyzers
ICS Classification:	17.040.30-Measuring instruments
Chinese Classification:	N50-Material composition analysis instrument and environment detection instrument in general
Professional Classification:	GB-National Standard
Related Keywords:	breath alcohol analyzer introduction background passive test function requirements residual effect test case free drop test implementation suggestions cmc metrology license mark damp heat test
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《GB/T 21254-2017呼出气体酒精含量检测仪》由312（公安部）归口，主管部门为公安部。

Introduction

Background of Standard Revision and Technological Evolution

This standard replaces GB/T 21254-2007 version. The main technical changes include:

Added 6 new term definitions such as measurement mode and maintenance mode
Deleted the passive test function requirements
Strengthened anti-tampering design (hardware protection + software password protection)
Added 11 new indicators such as exhaled volume/duration effect

Comparison of core performance requirements

Indicators	2007 version	2017 version	Range of change
Maximum allowable error	±0.04mg/L or ±10%	Segment requirements (see Table 1)	Error limit tightened by 20%
Warm-up time	Not specified	≤15 minutes	Add mandatory requirements
Data storage	Not specified	≥8000 records cannot be deleted or modified	Strengthen the integrity of the evidence chain

Analysis of key test methods

Memory residual effect test case

According to clause 5.12 of the standard: first test 10 times with 0.100 mg/L and take the average value → inject 0.500 mg/L and test once → test 0.100 mg/L again. The difference between the two low concentrations should be ≤ 0.010 mg/L. This indicator can effectively avoid the interference of the previous high concentration test on the subsequent results.