GB2269669A - Testing accuracy of carbon monoxide detectors - Google Patents

Testing accuracy of carbon monoxide detectors Download PDF

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Publication number
GB2269669A
GB2269669A GB9316428A GB9316428A GB2269669A GB 2269669 A GB2269669 A GB 2269669A GB 9316428 A GB9316428 A GB 9316428A GB 9316428 A GB9316428 A GB 9316428A GB 2269669 A GB2269669 A GB 2269669A
Authority
GB
United Kingdom
Prior art keywords
vial
detector
bag
opening
carbon monoxide
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB9316428A
Other versions
GB9316428D0 (en
GB2269669B (en
Inventor
Robert Elliott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9316428D0 publication Critical patent/GB9316428D0/en
Publication of GB2269669A publication Critical patent/GB2269669A/en
Application granted granted Critical
Publication of GB2269669B publication Critical patent/GB2269669B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/007—Arrangements to check the analyser
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • G01N33/004—CO or CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

A system (10) for testing a CO detector (30) comprises a frangible vial (18) filled with a measured amount of CO and a flexible walled bag (12) having a sealable opening (14) and configurable to a known volume and being sized to admit a CO detector for checking and the vial. <IMAGE>

Description

CARBON MONOXIDE DETECTOR VERIFIER This invention relates to apparatus for testing a CO detector.
Carbon monoxide (CO) detectors may be used in the home or other buildings to detect the concentration of CO. These detectors form part of a system which is designed to go into alarm if a dangerous concentration of CO is detected by the detector. However, the detector may lose its ability over time to accurately indicate the parts per million (PPM) concentration of CO. Accordingly, it would be desirable to be able to determine whether the detector in such a system remains effective.
According to the present invention there is provided a system for testing a CO detector comprising: a frangible vial filled with a measured amount of CO; a flexible walled bag having a sealable opening and configurable to a known volume when said opening is not sealed, said opening, when not sealed, sized to admit a CO detector and said vial.
In the figures which illustrate example embodiments of the invention Figure 1 is a schematic side view of a system made in accordance with this invention; Figure 2a and 2b are schematic side views of a portion of the system of Figure 1.
With reference to Figure 1, the system 10 of this invention comprises a flexible walled bag 12 with a zip-lock top opening 14 and a pull tab 16. The bag is detailed in Figure 2.
Turning now to Figure 2, the bag may be placed in a storage configuration illustrated in Figure 2a and the zip-lock top closed to seal the bag in this configuration. In the storage configuration, the bag takes up little space. Later, the zip-lock top may be opened and pull tab 16 pulled to open out the bag to an open configuration illustrated in Figure 2b. In the open configuration, the bag contains a known volume of air.
Returning now to Figure 1, the system of the invention also comprises a vial 18 which contains a measured amount of CO gas. The vial is made of glass or plastic and is scored in the middle at line 20 to weaken it. A plastic jacket 22a,22b covers either end and the majority of the sides of the vial.
To test a home CO detector once, the bag 12 is opened to admit a detector 30 and a sealed vial 18.
Pull tab 16 is then pulled to open out the bag to its open configuration (illustrated in Figure 2b). The bag is then sealed at zip-lock top 14. At this point, the bag is filled with a known volume of air (subject to a small discrepancy based on the volume of air displaced by the detector and the vial). A user then grasps either end of the vial through the flexible walls of the bag and snaps the vial like a matchstick along the weakened score line 20. To preclude the possibility of injury in the event of glass/plastic slivers from the snapped tidal, the user grips the plastic covers to snap the vial.
Once the vial is broken, because the vial contains a known amount of CO and since the bag, in its open configuration, has a known volume, a particular PPM of CO will then be present in the bag which should be measured by the detector. If the detector does not measure this particular PPM concentration (within a certain acceptable tolerance), this will indicate the detector should be replaced.
Other bag shapes are possible and other ways to seal the bag opening may be suitable. Other modifications will be apparent to those skilled in the art.

Claims (3)

1. A system for testing a CO detector comprising a frangible vial filled with a measured amount of CO; a flexible walled bag having a sealable opening, and configurable to a known volume when said opening is not sealed, said opening, when not sealed, sized to admit a CO detector and said vial.
2. The system of claim 1, wherein said vial has a medial score line for weakening the vial at said line and including non-frangible end caps for grasping by an operator to facilitate safe breaking of said vial.
3. The system of claim 2, wherein said sealable opening is a zip-lock opening.
GB9316428A 1992-08-14 1993-08-06 Carbon monoxide detector verifier Expired - Fee Related GB2269669B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB929217333A GB9217333D0 (en) 1992-08-14 1992-08-14 Carbon monoxide detector verifier

Publications (3)

Publication Number Publication Date
GB9316428D0 GB9316428D0 (en) 1993-09-22
GB2269669A true GB2269669A (en) 1994-02-16
GB2269669B GB2269669B (en) 1996-01-10

Family

ID=10720387

Family Applications (2)

Application Number Title Priority Date Filing Date
GB929217333A Pending GB9217333D0 (en) 1992-08-14 1992-08-14 Carbon monoxide detector verifier
GB9316428A Expired - Fee Related GB2269669B (en) 1992-08-14 1993-08-06 Carbon monoxide detector verifier

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB929217333A Pending GB9217333D0 (en) 1992-08-14 1992-08-14 Carbon monoxide detector verifier

Country Status (1)

Country Link
GB (2) GB9217333D0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2371860A (en) * 2001-01-09 2002-08-07 John Michael Stones Testing gas detectors
WO2015043796A1 (en) * 2013-09-24 2015-04-02 Robert Bosch Gmbh Device and method for calibrating a gas sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2371860A (en) * 2001-01-09 2002-08-07 John Michael Stones Testing gas detectors
GB2371860B (en) * 2001-01-09 2004-08-11 John Michael Stones Gas detector testing accessory
WO2015043796A1 (en) * 2013-09-24 2015-04-02 Robert Bosch Gmbh Device and method for calibrating a gas sensor

Also Published As

Publication number Publication date
GB9217333D0 (en) 1992-09-30
GB9316428D0 (en) 1993-09-22
GB2269669B (en) 1996-01-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980806