BS IEC 62990-1 pdf free download

BS IEC 62990-1-2019 pdf free download.Workplace atmospheres Part 1: Gas detectors一Performance requirements of detectors for toxic gases.
This part of ISO!IEC 62990 specifIes general requirements for design, function and performance, and describes the test methods that apply to portable, transporlable, and fixed equipment for the detection and concentration measurement of toxic gases and vapours in workplace atmospheres and other industrial and commercial applications.
This document Is applicable to continuously sensing equipment whose primary purpose is to provide an indication, alarm andlor other output function the purpose of which is to indicate the presence of a toxic gas or vapour in the atmophr and in some cases to initiate automatic or manual protective action(s). It is applicable to equipment in which the sensor generates an electrical signal when gas Is present.
This document applies to two types of equipment:
Type HM (Health Monitoring) occupational exposure equipment:
For occupational exposure measurement, the performance requirements are focused on uncertainty of measurement of gas concentrations in the region of Occupational Exposure Limit Values (OELV) The upper limit of measurement will be defined by the manufacturer in accordance with 4-2.1
Type SM (Safety Monitoring) ‘general gas detection’ equipment:
For general gas detection applications (e.g. safety warning, leak detection), the performance requirements are focused on alarm signalling. The upper limit of measurement will be defined by the manufacturer .ccording to lb. intended us. af t*i equipment.
In general, the requirements for accuracy will be higher for Type HM equipment than for Type
SM equipment. The same equipment may meet the requirements of both Type HM and Type
SM
For equipment used for sensing the presence of multiple gases this document applies only to the detection of toxic gas or vapour.
This document is not applicable to equipment:
— with samplers and concentrators such as sorbents or paper tape having an wreversible indication;
— used for the measurement of gases and vapours related to the risk of explosion; used for the measurement of oxygen;
— used only in laboratories for analysis or measurement;
— used only for process measurement purposes;
– used in the domestic environment;
— used in environmental air pollution monitoring;
– used for open-path (line of sight) area gas measurement.
— used for ventilation control in car parks or tunnels.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60068-2-6, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal)
IEC 60079-0, Explosive atmospheres — Part 0: Equipment — General requirements
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 61000-4-29, Electromagnetic compatibility (EMC) — Part 4-29: Testing and measurement techniques — Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests
IEC 61000-6-3, Electromagnetic compatibility (EMC) — Part 6-3: Generic standards — Emission standard for residential, commercial and light-industrial environments
IEC 61000-6-4, Electromagnetic compatibility (EMC) — Part 6-4: Generic standards — Emission standard for industrial environments
IEC 61326-1. Electrical equipment for measurement, control and laboratory use – EMC requirements — Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.orgl
• ISO Online browsing platform: available at http:l/www.iso.org/obp
3.1 gas properties
3.1.1 ambient air
normal atmosphere surrounding the equipment.BS IEC 62990-1 pdf download.