Gas alarm grounding requirements
Gas alarm grounding requirements, Total:185 items.
The international standard classification for "Gas alarm grounding requirements" includes: Protection against dangerous goods , Protective equipment , Lighting signalling and warning devices , Protection against crime , Alarm and warning systems , IT applications in other fields .
The Chinese standard classification for "Gas alarm grounding requirements" includes: Hygiene, safety and labor protection , Environmental monitoring instrument and its complete equipment , Production environment safety and health facilities , Safety requirements on protection equipment , New energy vehicle and other automobiles , Guard and alarm system , Social and public safety in general .
国家安全生产监督管理总局
- MT 1084-2007 Hydrogen sulfide detection alarm device for coal mines
Professional Standard - Coal
- MT 1084-2008 Coal mine hydrogen sulfide alarm detector
National Metrological Verification Regulations of the People's Republic of China
- JJG(煤炭) 10-1998 Verification Regulation of Oxygen Detector
- JJG 1125-2016 Verification Regulation of Vinyl Chloride Gas Monitors and Alarms
- JJG(煤炭) 11-1998 Verification Regulation of Methane-Oxygen Detector
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
- GB 12358-2006 Gas monitors and alarms for workplace General technical requirements
- GB 12358-1990 Gas monitors and alarms for workplace atmosphere general technical requirements
Group Standards of the People's Republic of China
- T/QGCML 3136-2024 Fixed gas detection alarm software
- T/QGCML 3304-2024 Gas alarm instrument calibration service platform
- T/JNM 0006-2024 Calibration method for trace hydrogen detection alarm
- T/CCSAS 015-2022 Code for safe use and maintenance of gas detector
- T/SBX 15-2018 Portable Gas Detection Alarm
- T/QGCML 3139-2024 Based on STM32 natural gas detection and alarm system
National Metrological Technical Specifications of the People's Republic of China
- JJF 1433-2013 Calibration Specification for Chlorine Alarm Detectors
Professional Standard-Safe Production
- AQ/T 3044-2013 Technical specification for ammonia detection instruments
国家市场监督管理总局、中国国家标准化管理委员会
- GB/T 36123-2018 Technical requirements for gas leakage alarm device of gas vehicle
化学工业部
- HG/T 2359-1992 Electrochemical harmful gas detection alarm instrument
Henan Provincial Standard of the People's Republic of China
- DB4102/T 014-2020 Installation and use requirements for combustible gas detection and alarm
Professional Standard - Public Safety Standards
- GA 127-1996 Technical requirements and test methods for household comdustible gas alarm unit
- GA/T 600.1~600.5-2006 Alarm Transmission System Requirements
- GA/T 368-2001 Specifications for intrusion alarm systems
- GA/T 1987-2022 Technical requi rements for portable recording equipment for law enforcement accessing the mobile police information system
- GA/T 600.3-2006 Re quirementsf ora larm transmission systems一
未注明发布机构
- VDS:3131 Smoke alarm, additional requirements
Military Standard of the People's Republic of China-General Armament Department
- GJB 1071A-2021 Ship alarm and security system requirements
Korean Agency for Technology and Standards (KATS)
- KS E 4115-2013 Interferometer type gas alarms
- KS C 6571-1-1997 Alarm system-General requirement Part 1 : General
- KS C IEC 60839-5-2:2007 Alarm systems-Part 5:Requirement for alarm transmission systems-Section 2:General requirements for equipment
- KS C IEC 60839-5-1:2007 Alarm systems-Part 5:Requirement for alarm transmission systems-Section 1:General requirements for systems
- KS C IEC 60839-5-3:2021 Alarm and electronic security systems ―Part 5-3: Alarm transmission systems ― Requirements for receiving centre transceiver(RCT)
- KS C 6115-2021 Alarm systems-Part 2:Requirements for intruder alarm systems-Section Two-Requirements for detectors-General
PL-PKN
- PN E08390-24-1993 Alarm systems. Requirements for intruder alarm systems. Ultrasonic Doppler detectors for use in buildings
- PN E08390-51-1993 Alarm systems. Requirements for alarm transmission systems. General requirements for systems
- PN E08390-22-1993 Alarm systems. Requirements for intruder alarm systems. Requirements for detectors. General
- PN E08390-52-1993 Alarm systems. Requirements for alarm transmission systems. General requirements for equipment
- PN E08390-54-1993 Alarm systems. Requirements for alarm transmission systems. Alarm transmission systems using dedicated alarm transmission paths
- PN E08390-11-1993 Alarm systems. General requirements. General
- PN E08390-25-1993 Alarm systems. Requirements for intruder alarm systems. Microwave doppler detectors for use in buildings
- PN E08390-26-1993 Alarm systems. Requirements for intruder alarm systems. Passive infra-red detectors for use in buildings
Association Francaise de Normalisation
- NF C48-358-1:2010 Monitoring and alarm receiving centre - Part 1 : location and construction requirements.
- NF C48-220:1986 Alarm systems. General requirements.
- NF C48-371:2004 Alarm systems - Combined and integrated alarm systems - General requirements.
- NF C48-371:2010 Alarm systems - Combined and integrated alarm systems - General requirements.
- NF C48-331-1:1997 Alarm systems. Intrusion systems. Part 1 : General requirements.
- NF C48-341*NF EN 50134-1:2002 Alarm systems - Social alarm systems - Part 1 : system requirements
- NF C48-363*NF EN 50136-3:2013 Alarm systems - Alarm transmission systems and equipment - Part 3: requirements for Receiving Centre Transceiver (RCT)
- NF EN 50136-1/A1:2018 Alarm systems - Alarm transmission systems and equipment - Part 1: general requirements for alarm transmission systems
- NF C48-361-1/A1*NF EN 50136-1/A1:2018 Alarm systems - Alarm transmission systems and equipment - Part 1 : general requirements for alarm transmission systems
- NF C48-363/A1*NF EN 50136-3/A1:2021 Alarm systems - Alarm transmission systems and equipment - Part 3 : requirements for Receiving Centre Transceiver (RCT)
- NF C48-361-1:1998 Alarm systems. Alarm transmission systems and equipment. Part 1-1 : general requirements for alarm transmission systems.
- NF C48-361-1*NF EN 50136-1:2012 Alarm systems - Alarm transmission systems and equipment - Part 1 : general requirements for alarm transmission systems
- NF H00-002*NF EN ISO 11683:1997 Packaging. Tactile warnings of danger. Requirements.
- NF EN 14587-3:2012 Alarm systems - Alarm transmission systems and equipment - Part 1: general requirements for alarm transmission systems
- NF C48-361-1/A2:2008 Alarm system - Alarm transmission systems and equipment - Part 1-1 : general requirements for alarm transmission systems.
- NF C48-358-2:2014 Monitoring and alarm receiving centre - Part 2 : technical requirements
- NF C48-358-2:2010 Monitoring and alarm receiving centre - Part 2 : technical requirements.
- NF EN 50136-1:2012 Alarm systems - Alarm transmission systems and equipment - Part 1: general requirements for alarm transmission systems
- NF EN 3773-006:2017 Systèmes d'alarme - Systèmes d'alarme combinés et intégrés - Partie 1 : exigences générales
- NF C48-362-1/A1:2002 Alarm systems - Alarm transmission systems and equipment - Part 2-1 : general requirements for alarm transmission equipment.
- NF EN 50398-1:2017 Systèmes d'alarme - Systèmes d'alarme combinés et intégrés - Partie 1 : exigences générales
- NF C48-331-1*NF EN 50131-1:2007 Alarm systems - Intrusion and hold-up systems - Part 1 : system requirements.
- NF EN 50131-1/A3:2020 Systèmes d'alarme - Systèmes d'alarme contre l'intrusion et les hold-up - Partie 1 : exigences système
- NF EN 50131-1/A2:2017 Systèmes d'alarme - Systèmes d'alarme contre l'intrusion et les hold-up - Partie 1 : exigences système
- NF EN 50131-1:2007 Systèmes d'alarme - Systèmes d'alarme contre l'intrusion et les hold-up - Partie 1 : exigences système
- NF C48-362-1:1998 Alarm systems. Alarm transmission systems and equipment. Part 2-1 : general requirements for equipment used in systems using dedicated alarm paths.
- NF EN 50131-1/A1:2010 Systèmes d'alarme - Systèmes d'alarme contre l'intrusion et les hold-up - Partie 1 : exigences système
- NF C48-300-4*NF EN 50130-4:2011 Alarm systems - Part 4 : electromagnetic compatibility - Product family standard : immunity requirements for components of fire, intruder, hold up, CCTV, acess control and social alarm systems
- NF C48-361-2:1998 Alarm systems. Alarm transmission systems and equipment. Part 1-2 : requirements for systems using dedicated alarm paths.
Japanese Industrial Standards Committee (JISC)
- JIS M 7625:1993 Interferometer type gas alarms
British Standards Institution (BSI)
- BS EN 50134-1:2002 Alarm systems - Social alarm systems - System requirements
- BS EN 50518-2:2013 Monitoring and alarm receiving centre. Technical requirements
- BS EN 50518-2:2010 Monitoring and alarm receiving centre. Technical requirements
- BS EN 50136-3:2013 Alarm systems. Alarm transmission systems and equipment. Requirements for Receiving Centre Transceiver (RCT)
- BS EN 50136-3:2013+A1:2021 Alarm systems. Alarm transmission systems and equipment - Requirements for Receiving Centre Transceiver (RCT)
- BS EN 50136-2-1:1998 Alarm systems - Alarm transmission systems and equipment - General requirements for alarm transmission equipment
- BS EN 50136-1-1:1998 Alarm systems - Alarm transmission systems and equipment - General requirements for alarm transmission systems
- BS EN 50136-1-1:1998+A2:2008 Alarm systems. Alarm transmission systems and equipment General requirements for alarm transmission systems
- BS EN 50136-1:2012 Alarm systems. Alarm transmission systems and equipment General requirements for alarm transmission systems
- BS EN 50398-1:2017 Alarm systems. Combined and integrated alarm systems. General requirements
- BS EN 50136-1:2012+A1:2018 Alarm systems. Alarm transmission systems and equipment - General requirements for alarm transmission systems
- BS EN 50136-1-2:1998 Alarm systems - Alarm transmission systems and equipment - Requirements for systems using dedicated alarm paths
- BS EN 50518-3:2013 Monitoring and alarm receiving centre. Procedures and requirements for operation
- BS EN 50518-3:2011 Monitoring and alarm receiving centre. Procedures and requirements for operation
- PD CLC/TS 50136-10:2022 Alarm systems. Alarm transmission systems and equipment. Requirements for remote access
- BS EN 50518-1:2010 Monitoring and alarm receiving centre. Location and construction requirements
- BS EN 50518-1:2013 Monitoring and alarm receiving centre. Location and construction requirements
- BS EN 50136-2-2:1998 Alarm systems - Alarm transmission systems and equipment - Requirements for equipment used in systems using dedicated alarm paths
VDE - VDE Verlag GmbH@ Berlin@ Germany
- VDE V 0830-6-398-2010 Alarm systems - Combined and integrated alarm systems - General requirements; German version CLC/TS 50398:2009
- VDE 0830-5-3-2014 Alarm systems - Alarm transmission systems and equipment - Part 3: Requirements for Receiving Centre Transceiver (RCT); German version EN 50136-3:2013
- VDE 0830-5-1/A1-2017 Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems; German version EN 50136-1:2012/prA1:2017
CENELEC - European Committee for Electrotechnical Standardization
- CLC/TS 50398-2002 Alarm systems - Combined and integrated alarm systems - General requirements
- EN 50136-3:2013 Alarm systems - Alarm transmission systems and equipment - Part 3: Requirements for Receiving Centre Transceiver (RCT)
- EN 50136-1-1:1998 Alarm Systems - Alarm Transmission Systems and Equipment - Part 1-1: General Requirements for Alarm Transmission Systems
- EN 50136-1-2:1998 Alarm Systems - Alarm Transmission Systems and Equipment - Part 1-2: Requirements for Systems Using Didicated Alarm Paths
SCC
- CEI CLC/TS 50398:2013 Alarm systems - Combined and integrated alarm systems - General requirements
- DANSK DS/CLC/TS 50398:2009 Alarm systems – Combined and integrated alarm systems – General requirements
- AENOR UNE-CLC/TS 50398 V2:2005 Alarm systems. Combined and integrated alarm systems. General requirements.
- UNE-CLC/TS 50398:2005 V2 Alarm systems - Combined and integrated alarm systems - General requirements
- CEI EN 50134-1:2003 Alarm systems - Social alarm systems - Part 1: System requirements
- DANSK DS/EN 50134-1:2002 Alarm systems - Social alarm systems - Part 1: System requirements
- DANSK DS/EN 50518-2:2013 Monitoring and alarm receiving centre – Part 2: Technical requirements
- UNE-EN 50518-2:2011 Monitoring and alarm receiving centre -- Part 2: Technical requirements.
- BS PD CLC/TS 50136-10:2022 Alarm systems. Alarm transmission systems and equipment-Requirements for remote access
- AENOR UNE-EN 50518-2/AC:2011 Alarm monitoring and reception center. Part 2: Technical requirements.
- BS DD CLC/TS 50398:2002 Alarm systems. Combined and integrated alarm systems. General requirements
- DANSK DS/IEC 839-5-1:1992 Alarm systems - Part 5: Requirements for alarm transmission systems - Section 1: General requirements for systems
- AENOR UNE-EN 50518-2:2014 Alarm monitoring and reception center. Part 2: Technical requirements.
- CEI UNI EN 50518-2:2014 Monitoring and alarm receiving centre Part 2: Technical requirements
- CEI EN 50136-3:2014 Alarm systems - Alarm transmission systems and equipment Part 3: Requirements for Receiving Centre Transceiver (RCT)
- DANSK DS/EN 50136-1/A1:2012 Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems
- CEI EN 50136-1/A1:2019 Alarm systems - Alarm transmission systems and equipment Part 1: General requirements for alarm transmission systems
- DIN EN 50136-1 E:2008 Draft Document - Alarm systems - Alarm transmission systems - Part 1: General requirements for alarm transmission systems; German version prEN 50136-1:2008
- DANSK DS/EN 50136-3:2013 Alarm systems - Alarm transmission systems and equipment - Part 3: Requirements for Receiving Centre Transceiver (RCT)
- CEI EN 50136-3/A1:2014 Alarm systems - Alarm transmission systems and equipment Part 3: Requirements for Receiving Centre Transceiver (RCT)
- CEI EN 50136-1:2013 Alarm systems - Alarm transmission systems and equipment Part 1: General requirements for alarm transmission systems
- DIN EN 50136-1:2019 Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems; German version EN 50136-1:2012 + A1:2018
- DANSK DS/EN 50136-1:2012 Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems
- AENOR UNE-EN 50136-2-1:1998 Alarm systems. Alarm transmission systems and equipment. Part 2-1: General requirements for alarm transmission equipment.
- UNE-EN 50136-1-1:1999 ALARM SYSTEMS. ALARM TRANSMISSION SYSTEMS AND EQUIPMENT. PART 1-1: GENERAL REQUIREMENTS FOR ALARM TRANSMISSION SYSTEMS.
- DANSK DS/EN 50136-1-1:1998 Alarm systems - Alarm transmission systems and equipment - Part 1-1: General requirements for alarm transmission systems
- CEI EN 50136-2-1:1998 Alarm systems - Alarm transmission systems and equipment - Part 2-1: General requirements for alarm transmission equipment
- 09/30210479 DC BS EN 50136-1. Alarm systems. Alarm transmission systems. Part 1. General requirements for alarm transmission systems
- 08/30180103 DC BS EN 50136-1. Alarm systems. Alarm transmission systems. Part 1. General requirements for alarm transmission systems
- CEI EN 50398-1:2018 Alarm systems - Combined and integrated alarm systems Part 1: General requirements
- UNE-EN 50136-2-1:1998 ALARM SYSTEMS. ALARM TRANSMISSION SYSTEMS AND EQUIPMENT. PART 2-1: GENERAL REQUIREMENTS FOR ALARM TRANSMISSION EQUIPMENT.
- AENOR UNE-EN 50398-1:2018 Alarm systems - Combined and integrated alarm systems - Part 1: General requirements
- DIN EN 50136-1/A1 E:2018 Draft Document - Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems; German and English version EN 50136-1:2012/FprA1:2018
- DIN EN 50136-3 E:2012 Draft Document - Alarm systems - Alarm transmission systems and equipment - Part 3: Requirements for Receiving Centre Transceiver (RCT); German version prEN 50136-3:2011
- DIN EN 50518-2 E:2013 Draft Document - Monitoring and alarm receiving centre - Part 2: Technical requirements; German version FprEN 50518-2:2013
- DIN EN 50136-1-2:2000 Alarm systems - Alarm transmission systems and equipment - Part 1-2: Requirements for systems using dedicated alarm paths; German version EN 50136-1-2:1998
- DANSK DS/IEC 60839-5-3:2016 Alarm and electronic security systems - Part 5-3: Alarm transmission systems - Requirements for receiving centre transceiver (RCT)
- UNE-EN 50136-1-2:2000 Alarm systems. Alarm transmission systems and equipment. Part 1-2: Requirements for systems using dedicated alarm paths.
Danish Standards Foundation
- DS/CLC/TS 50398:2009 Alarm systems - Combined and integrated alarm systems - General requirements
- DS/EN 50134-1:2002 Alarm systems - Social alarm systems - Part 1: System requirements
- DS/EN 50136-3:2021 Alarm systems – Alarm transmission systems and equipment – Part 3: Requirements for Receiving Centre Transceiver (RCT)
- DS/EN 50136-3:2013 Alarm systems - Alarm transmission systems and equipment - Part 3: Requirements for Receiving Centre Transceiver (RCT)
- DS/EN 50136-1:2012 Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems
- DS/EN 50136-2-1:1998 Alarm systems - Alarm transmission systems and equipment - Part 2-1: General requirements for alarm transmission equipment
- DS/EN 50518-2:2010 Monitoring and alarm receiving centre - Part 2: Technical requirements
- DS/EN 50136-2-1/Corr.:1999 Alarm systems - Alarm transmission systems and equipment - Part 2-1: General requirements for alarm transmission equipment
- DS/EN 50518-2/AC:2011 Monitoring and alarm receiving centre - Part 2: Technical requirements
- DS/EN 50136-2-1/A1:2002 Alarm systems - Alarm transmission systems and equipment - Part 2-1: General requirements for alarm transmission equipment
- DS/IEC 839-2-2:1989 Alarm systems. Part 2: Requirements for intruder alarm systems. Section Two. Requirements for detectors. General
European Committee for Electrotechnical Standardization(CENELEC)
- EN 50131-5-3:2017 Alarm systems - Intrusion systems - Part 5-3: Requirements for interconnections equipment using radio frequency techniques
- EN 50134-1:2002 Alarm Systems - Social Alarm Systems Part 1: System Requirements
- EN 50136-1:2012 Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems
- EN 50518-2:2010 Monitoring and alarm receiving centre - Part 2: Technical requirements
- EN 50518-2:2013 Monitoring and alarm receiving centre - Part 2: Technical requirements
- EN 50398-1:2017 Alarm systems - Combined and integrated alarm systems - Part 1: General requirements
YU-JUS
- JUS N.S6.111-1989 Alarm systems. Intruder alarm systems. Reguirements fordetectors — general
- JUS Z.F1.002-1990 Electronic warning siren. Technical requirements
German Institute for Standardization
- DIN EN 50134-1:2003 Alarm systems - Social alarm systems - Part 1: System requirements; German version EN 50134-1:2002
- DIN EN 50136-1-1:2008 Alarm systems - Alarm transmission systems and equipment - Part 1-1: General requirements for alarm transmission systems; German version EN 50136-1-1:1998 + A1:2001 + A2:2008
AENOR
- UNE-EN 50134-1:2003 Alarm systems - Social alarm systems -- Part 1: System requirements
- UNE-EN 50136-3:2014 Alarm systems - Alarm transmission systems and equipment - Part 3: Requirements for Receiving Centre Transceiver (RCT)
- UNE-EN 50136-1:2012 Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems
- UNE-EN 50518-2:2014 Monitoring and alarm receiving centre - Part 2: Technical requirements
Lithuanian Standards Office
- LST EN 50134-1-2003 Alarm systems. Social alarm systems. Part 1: System requirements
- LST EN 50136-3/A1-2021 Alarm systems - Alarm transmission systems and equipment - Part 3: Requirements for Receiving Centre Transceiver (RCT)
- LST EN 50136-1-2012 Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems
- LST EN 50136-2-1-2001 Alarm systems. Alarm transmission systems and equipment. Part 2-1: General requirements for alarm transmission equipment
- LST EN 50136-2-1-2001/A1-2002 Alarm systems. Alarm transmission systems and equipment. Part 2-1: General requirements for alarm transmission equipment
- LST EN 50518-2-2014 Monitoring and alarm receiving centre -- Part 2: Technical requirements
- LST EN 50518-2-2011/AC-2011 Monitoring and alarm receiving centre - Part 2: Technical requirements
- LST EN 50518-2-2011 Monitoring and alarm receiving centre - Part 2: Technical requirements
RO-ASRO
- STAS SR CEI 839-5-1-1995 Alarm systems. Part 5: Requirements for alarm transmission syslems. Section 1: Generai requirements for systems
- SR CEI 839-2-5-1996 Alarm systems. Part 2: Requirements for intruder alarm systems. Section 5-Microwave Doppler detectors for use in buildings
- SR CEI 839-2-4-1996 Alarm systems. Part 2: Requirements for intruder alarm systems. Section 4-Ultrasonic Doppler detectors for use in buildings
- STAS SR CEI 839-5-4-1995 Alarm systems. Part 5: Requirements for alarm transmission systems. Section 4: Alarm transmission systems using dedicated alarm transmission paths
- STAS SR CEI 839-5-2-1995 Alarm systems. Part 5: Requirements for alarm transmission systems. Section 2: General requirements for equipment
RU-GOST R
- GOST 27990-1988 Means of alarm, fire and alarm-fire systems. General technical requirements
- GOST R 54832-2011 Alarms are guarding point magnetic contact. General requirements and test methods
ES-UNE
- UNE-EN 50136-3:2014/A1:2022 Alarm systems - Alarm transmission systems and equipment - Part 3: Requirements for Receiving Centre Transceiver (RCT)
- UNE-EN 50136-1:2012/A1:2019 Alarm systems - Alarm transmission systems and equipment - Part 1: General requirements for alarm transmission systems
- UNE-EN 50398-1:2018 Alarm systems - Combined and integrated alarm systems - Part 1: General requirements
European Committee for Standardization (CEN)
- CENELEC EN 50136-1-1-1998 Alarm systems — Alarm transmission systems and equipment— Part 1-1: General requirements for alarm transmission systems
International Electrotechnical Commission (IEC)
- IEC 60839-5-2:1991 Alarm systems; part 5: requirements for alarm transmission systems; section 2: general requirements for equipment
- IEC 60839-5-1:1991 Alarm systems; part 5: requirements for alarm transmission systems; section 1: general requirements for systems
- IEC 60839-5-4:1991 Alarm systems; part 5: requirements for alarm transmission systems; section 4: alarm transmission systems using dedicated alarm transmission paths
- IEC 60839-2-2:1987 Alarm systems. Part 2: Requirements for intruder alarm systems. Section Two - Requirements for detectors - General.
GSO
- OS GSO IEC 60839-5-1:2013 Alarm systems - Part 5: Requirements for alarm transmission systems - Section 1: General requirements for systems
- GSO IEC 60839-5-1:2013 Alarm systems - Part 5: Requirements for alarm transmission systems - Section 1: General requirements for systems
- BH GSO IEC 60839-5-3:2022 Alarm and electronic security systems - Part 5-3: Alarm transmission systems - Requirements for receiving centre transceiver (RCT)
- GSO IEC 60839-5-3:2021 Alarm and electronic security systems - Part 5-3: Alarm transmission systems - Requirements for receiving centre transceiver (RCT)
TH-TISI
- TIS 1517-1998 Alarm systems.part 2: requirements for intruder alarm systems section 2: requirements for detectors-general