GB 12358-2024Gas detection and alarm instruments for workplace - General technical requirements (English PDF)

3 Terms and definitions

4 Classification

5 Technical requirements

6 Test methods

7 Inspection rules

8 Packaging, transport and storage

9 Marking

10 Instructions for use

11 Requirements for use

Foreword

This document is drafted in accordance with the rules given in GB/T 1.1-2020, Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document replaces GB 12358-2006, Gas detection and alarm instruments for workplace - General technical requirements. Compared with GB 12358-2006, apart from structural adjustments and editorial changes, the main technical changes are as follows:

a) 10 terms and definitions have been deleted: sensor, detection range, stability, response time, monitoring state, alarm state, fault state, permissible concentration-time weighted average, permissible concentration-short term exposure limit and maximum allowable concentration (see 3.1, 3.8, 3.13, 3.14, 3.15, 3.16, 3.17, 3.20, 3.21 and 3.22 of the 2006 edition);

b) 12 terms and definitions have been changed: detector, indicator, alarm, gas detector, gas alarm, gas detector and alarm, detection error, alarm error, alarm set point, repeatability, zero gas and standard gas (see 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.17, 3.18, 3.29, 3.20, 3.25 and 3.26; 3.2, 3.4, 3.5, 3.6, 3.7, 3.9, 3.10, 3.11, 3.12, 3.18 and 3.19 of the 2006 edition);

c) 23 terms and definitions have been added: portable instrument, fixed instrument, aspirated instrument, diffusion instrument, contact instrument, contactless instrument, upper measurement limit, minimum response value, display resolution, instrument drift, indication response time, alarm response time, maximum sampling distance, effective detection distance, adjustment, calibration, integrated concentration, lower explosive limit, volume fraction, occupational exposure limit, immediately dangerous to life or health concentration, toxic and harmful gases, and flammable gases (see 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.14, 3.15, 3.16, 3.19, 3.21, 3.22, 3.23, 3.24, 3.27, 3.28, 3.30, 3.31, 3.32, 3.33, 3.34, 3.35 and 3.36);

d) the classification requirements have been changed (see Clause 4; 2006 edition);

e) the requirements and tests for the appearance of instruments have been changed (see 5.1 and 6.2; 5.2 and 6.1.5 of the 2006 edition);

f) general requirements and tests have been added for gas detectors, gas alarms, gas detectors and alarms, and contactless instruments (see 5.2.1.1, 5.2.1.2, 5.2.1.3, 5.2.1.4, 6.3.1.1, 6.3.1.2, 6.3.1.3, 6.3.1.4, 6.3.1.5, 6.3.1.6 and 6.3.1.7);

g) audible and visual requirements and tests have been added for gas detectors and alarms and for gas alarms (see 5.2.1.6 and 6.2.2);

h) requirements and tests for the maximum sampling distance and flow rate of aspirated instruments have been added (see 5.2.1.10 and 6.3.1.8);

i) the requirements and tests for orientation have been changed (see 5.2.3 and 6.3.3; 5.3.6 and 6.7 of the 2006 edition);

j) the performance requirements and tests for response time have been changed (see 5.2.4 and 6.3.4; 5.3.8 and 6.9 of the 2006 edition);

k) the performance requirements and tests for high-velocity air flow have been changed (see 5.2.5 and 6.3.5; 5.3.10 and 6.11 of the 2006 edition);

l) the requirements and tests for full-scale indication deviation have been deleted (see 5.3.9 and 6.10 of the 2006 edition);

m) the performance requirements and tests for insulation and dielectric strength have been changed (see 5.2.7, 6.3.7 and 6.3.8; 5.3.12, 6.13 and 6.14 of the 2006 edition);

n) the requirements and test conditions for the high and low temperature tests have been changed (see 5.2.8 and 6.3.9; 5.3.16, 6.18 and 6.19 of the 2006 edition);

o) the test requirements and test conditions for damp heat, steady state, have been changed (see 5.2.9 and 6.3.10; 5.3.17 and 6.20 of the 2006 edition);

p) the radiated electromagnetic field test, the electrostatic discharge test and the electrical fast transient/burst test have been changed (see 6.3.11; 5.3.13, 5.3.14 and 5.3.15 of the 2006 edition);

q) performance requirements and tests for surge (impulse) immunity and for immunity to conducted disturbances induced by radio-frequency fields have been added (see 5.2.10, 6.3.11.4 and 6.3.11.5);

r) the acceleration test condition of the vibration test and the drop height test condition of the drop test, in the vibration and drop tests, have been changed (see Table 10 in 6.3.12.1; 5.3.18 of the 2006 edition);

s) requirements and tests for steam interference have been added (see 5.2.12 and 6.3.14);

t) the statement on the influence of interfering gases has been deleted (see 5.3.19 of the 2006 edition);

u) requirements and tests for wireless communication have been added (see 5.3 and 6.4);

v) requirements and tests for functional safety have been added (see 5.4 and 6.5);

w) the content on the main technical parameters of the product and on the applicable standard in the product marking requirements has been changed (see 9.1; 7.1 of the 2006 edition);

x) the inspection rules have been changed (see Clause 7; Clause 8 of the 2006 edition);

y) content stating the limitations on conditions of use has been added to the product instructions (see Clause 10);

z) requirements for the use of instruments have been added, including requirements for instrument selection, adjustment, calibration and periodic verification (see Clause 11).

Attention is drawn to the possibility that some elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

This document was proposed by and is under the jurisdiction of the Ministry of Emergency Management of the People's Republic of China.

This document was first issued in 1990 as GB 12358-1990 and first revised in 2006; this is the second revision.