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 Alarms (AREA)
  • Emergency Alarm Devices (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Alarm Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (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
CA2387969A1 (en) * 2000-08-30 2002-03-07 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
DE59208736D1 (en) 1997-09-04
ES2106097T3 (en) 1997-11-01
EP0501194B1 (en) 1997-07-30
EP0501194A1 (en) 1992-09-02

Similar Documents

Publication Publication Date Title
DE69317982T2 (en) Method and system for real-time data collection and display device
DK0610224T3 (en) Method and apparatus for managing a fume cupboard
DE3687098D1 (en) AUTOMATIC PERSONNEL MONITORING SYSTEM.
ES2168306T3 (en) PROMOTION OF THE USE OF A PORTABLE DEVICE FOR THE CONTROL / REGISTRATION OF AUDIENCE PERCENTAGES.
NL154894B (en) TELEVISION TRANSMISSION SYSTEM AND DECODING DEVICE AS A PART THEREOF.
DE3273421D1 (en) Method and arrangement for disturbance detection in hazard signalling systems, especially fire signalling systems
DE3583011D1 (en) DECODING METHOD FOR MANCHESTER-ENCODED SIGNALS.
ATE156286T1 (en) METHOD FOR PREDETERMINING THE MAINTENANCE TIME OF HAZARD DETECTORS
GB2326475A (en) Filter integrity monitoring system
FR2655564B1 (en) METHOD AND DEVICE FOR REDUCING THE CONTENT OF ACID POLLUTANT GASES FROM SMOKE FUMES FROM AN INCINERATION DEVICE.
DE69616466D1 (en) Fire alarm system
DE69328669T2 (en) Data recording system with a single recording end and recording start format indicator
DE69331224D1 (en) Use of confirmation signals present in an active line of a television signal for identifying an advertisement contained in a television signal and control circuit for identifying advertisement advertisements after such use
DE59205839D1 (en) Method and device for recognizing changes in the image content of a video image
ATE74482T1 (en) METHOD AND SYSTEM FOR MONITORING AT LEAST ONE LIGHT SOURCE.
FI945934A0 (en) Fire alarm system for early detection of fires
IE831474L (en) Detecting the pulse rate of animals
ES533356A0 (en) IMPROVEMENTS IN FIRE DETECTORS EQUIPPED WITH A SENSOR
DE59409681D1 (en) Device for attaching wall coverings or the like.
DE59000411D1 (en) METHOD FOR MONITORING GRANULATE FLOWS MOVING IN LINE.
FI962666A (en) Decoding a data signal transmitted in a television system
FR2610446B1 (en) METHOD FOR DETERMINING THE ALARM THRESHOLD OF THE CRITICAL WARMING RATIO, DEVICE FOR IMPLEMENTING IT, AND METHOD FOR DRIVING A NUCLEAR REACTOR
DE3671120D1 (en) METHOD AND DEVICE FOR THE OPERATIONAL MONITORING OF OPTICAL SMOKE DETECTORS.
JPS555109A (en) Welding work tracing device with decisional function
JPS56132607A (en) Fault detector