ATE156286T1 - METHOD FOR PREDETERMINING THE MAINTENANCE TIME OF HAZARD DETECTORS - Google Patents

METHOD FOR PREDETERMINING THE MAINTENANCE TIME OF HAZARD DETECTORS

Info

Publication number
ATE156286T1
ATE156286T1 AT92101904T AT92101904T ATE156286T1 AT E156286 T1 ATE156286 T1 AT E156286T1 AT 92101904 T AT92101904 T AT 92101904T AT 92101904 T AT92101904 T AT 92101904T AT E156286 T1 ATE156286 T1 AT E156286T1
Authority
AT
Austria
Prior art keywords
rwx
quiescent value
predetermining
rwb
time
Prior art date
Application number
AT92101904T
Other languages
German (de)
Inventor
Otto Walter Dipl-Ing Moser
Original Assignee
Siemens Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of ATE156286T1 publication Critical patent/ATE156286T1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/12—Checking intermittently signalling or alarm systems
    • G08B29/14—Checking intermittently signalling or alarm systems checking the detection circuits
    • G08B29/145—Checking intermittently signalling or alarm systems checking the detection circuits of fire detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Alarm Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Fire Alarms (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

A method for predetermining the probable period of time to a no longer permissible change in sensitivity, i.e. the operating life of alarm detectors. In an alarm detector system with quiescent value correction, the probable operating life (tF) of the detector is determined from its change in quiescent value (RWx - RWb) over a certain past period (tV=tx-tb) and its predetermined operating threshold (FS), which can also be a maintenance or disturbance threshold (WS or ST), by extrapolation: tF = (tx-tb) x FS-RWx DIVIDED RWx-RWb , where tx = particular actual time tb = reference time RWx = quiescent value at actual time RWb = quiescent value at reference time. <IMAGE>
AT92101904T 1991-02-26 1992-02-05 METHOD FOR PREDETERMINING THE MAINTENANCE TIME OF HAZARD DETECTORS ATE156286T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4106025 1991-02-26

Publications (1)

Publication Number Publication Date
ATE156286T1 true ATE156286T1 (en) 1997-08-15

Family

ID=6425926

Family Applications (1)

Application Number Title Priority Date Filing Date
AT92101904T ATE156286T1 (en) 1991-02-26 1992-02-05 METHOD FOR PREDETERMINING THE MAINTENANCE TIME OF HAZARD DETECTORS

Country Status (4)

Country Link
EP (1) EP0501194B1 (en)
AT (1) ATE156286T1 (en)
DE (1) DE59208736D1 (en)
ES (1) ES2106097T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002237013A1 (en) * 2000-08-30 2002-03-13 General Electric Company Computerized method and system for determining degradation of dc link capacitors
FR2829271B1 (en) * 2001-08-28 2005-12-02 J C Decaux TELESURVEILLANCE SYSTEM FOR LUMINOUS DISPLAY DEVICE
WO2005031268A2 (en) * 2003-09-18 2005-04-07 Siemens Aktiengesellschaft Measuring device for detecting a threshold value
GB2537940B (en) 2015-05-01 2018-02-14 Thorn Security Fire detector drift compensation
DE102017200544A1 (en) 2017-01-13 2018-07-19 Siemens Schweiz Ag Determination of a lead time for the replacement of an optical smoke detector depending on its contamination

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA785255B (en) * 1978-09-15 1979-12-27 Anglo Amer Corp South Africa Alarm system
DE3127324A1 (en) * 1981-07-10 1983-01-27 Siemens AG, 1000 Berlin und 8000 München METHOD AND ARRANGEMENT FOR INCREASING THE SENSITIVITY AND EMERGENCY SAFETY IN A DANGER, IN PARTICULAR FIRE DETECTING SYSTEM
CH669859A5 (en) * 1986-06-03 1989-04-14 Cerberus Ag
US4881060A (en) * 1988-11-16 1989-11-14 Honeywell Inc. Fire alarm system
DE3900456A1 (en) * 1989-01-10 1990-07-12 Heiland Bernd Service indicator module

Also Published As

Publication number Publication date
ES2106097T3 (en) 1997-11-01
DE59208736D1 (en) 1997-09-04
EP0501194B1 (en) 1997-07-30
EP0501194A1 (en) 1992-09-02

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