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SIST EN 50055:1997

(Main)

Electrical apparatus for the detection and measurement of combustible gases - Performance requirements for Group I apparatus indicating up to 5% (v/v) methane in air

Electrical apparatus for the detection and measurement of combustible gases - Performance requirements for Group I apparatus indicating up to 5% (v/v) methane in air

1.1 This European Standard specifies performance requirements for Group I (as defined in European Standard EN 50 054) portable, transportable and fixed apparatus for the detection and measurement of methane concentrations in mine air. The apparatus, or parts thereof, are intended for use in mines susceptible to firedamps and shall meet the General requirements and test methods specified in European Standard EN 50054. NOTE. The use of Group I apparatus may not be permitted without the additional and prior approval of the relevant authority in mines under its jurisdiction, see Note 1 under clause 1.1 of European Standard EN 50054. 1.2 This European Standard is restricted to apparatus intended for the detection and measurement of methane volume ratios in air from 1 % (v/v) up to but not exceeding 5 % (v/v).

Elektrische Geräte für das Aufspüren und die Messung brennbarer Gase - Anforderungen an das Betriebsverhalten von Geräten der Gruppe I mit einem Meßbereich bis zu 5 % (V/V) Methan in Luft

Appareils électriques de détection et de mesure des gaz combustibles - Règles de performances des appareils du Groupe I pouvant indiquer jusqu'à 5 % (v/v) de méthane dans l'air

Electrical apparatus for the detection and measurement of combustible gases - Performance requirements for group I apparatus indicating up to 5 % (v/v) methane in air

General Information

Status
Withdrawn
Publication Date
31-May-1997
Withdrawal Date
31-Aug-2000
ICS
13.320 - Alarm and warning systems
29.260.20 - Electrical apparatus for explosive atmospheres
Technical Committee
EXP - Electrical apparatus for explosive atmospheres
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
01-Sep-2000
Due Date
01-Sep-2000
Completion Date
01-Sep-2000
Ref Project
EN 50055:1991 - Electrical apparatus for the detection and measurement of combustible gases - Performance requirements for Group I apparatus indicating up to 5% (v/v) methane in air

Relations

Replaced By
SIST EN 50055:2000 - Electrical apparatus for the detection and measurement of combustible gases - Performance requirements for Group I apparatus indicating up to 5 % (v/v) methane in air
Effective Date
28-Jan-2023
Amended By
SIST EN 50055:1997/A1:1997 - Electrical apparatus for the detection and measurement of combustible gases - Performance requirements for Group I apparatus indicating up to 5% (v/v) methane in air
Effective Date
21-Sep-2010
Amended By
SIST EN 50055:1997/A1:1997 - Electrical apparatus for the detection and measurement of combustible gases - Performance requirements for Group I apparatus indicating up to 5% (v/v) methane in air
Effective Date
28-Jan-2023
Amended By
SIST EN 50055:1997/A1:1997 - Electrical apparatus for the detection and measurement of combustible gases - Performance requirements for Group I apparatus indicating up to 5% (v/v) methane in air
Effective Date
07-Jun-2022

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SLOVENSKI STANDARD
SIST EN 50055:1997
01-junij-1997
Electrical apparatus for the detection and measurement of combustible gases -
Performance requirements for group I apparatus indicating up to 5 % (v/v)
methane in air
Electrical apparatus for the detection and measurement of combustible gases -
Performance requirements for Group I apparatus indicating up to 5% (v/v) methane in air
Elektrische Geräte für das Aufspüren und die Messung brennbarer Gase -
Anforderungen an das Betriebsverhalten von Geräten der Gruppe I mit einem
Meßbereich bis zu 5 % (V/V) Methan in Luft
Appareils électriques de détection et de mesure des gaz combustibles - Règles de
performances des appareils du Groupe I pouvant indiquer jusqu'à 5 % (v/v) de méthane
dans l'air
Ta slovenski standard je istoveten z: EN 50055:1991
ICS:
13.320 Alarmni in opozorilni sistemi Alarm and warning systems
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
SIST EN 50055:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževan
...

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b) equipment of laboratory or scientific type intended only for analysis or measurement
purposes;
c) equipment intended only for process control applications;
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e) equipment intended for the detection of a explosive atmosphere resulting from dust or
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EN IEC 60079-29-3 gives guidance for the design and implementation of a fixed gas detection system, including associated and/or peripheral gas detection equipment, for the detection of flammable gases/vapours and Oxygen when used in a safety-related application in accordance with IEC 61508 and IEC 61511. This International standard also applies to the detection of toxic gases. Other parts of this international standard and pertinent local, national and international standards separately specify the performance requirements of a gas detector and a gas detection control unit (logic solver). These standards are commonly known as Metrological Performance Standards and are concerned with the accuracy of the measured value, the overall system performance, but not the device or system integrity with respect to the safety function. This international standard applies to the integrity of the safety function. This international standard sets out safety-related considerations of fixed gas detection systems, including associated and/or peripheral gas detection equipment in terms of the framework and philosophy of IEC 61508, and introduces the particular requirements demanded by a fixed gas detection system as shown in Figure 2. This international standard does not consider the Safety Integrity Level SIL 4. SIL 4 is assumed to be unrealistic to be achieved for gas detection systems. This international standard is applicable for fixed gas detection systems, which might consist of the following hardware functional units - Gas sensor/transmitter - Gas detection control unit (logic solver) - Gas sampling (single and multiplexed streams) - Gas conditioning - Automatic gas calibration and adjustment - Output module (if not part of the control unit).

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