JPS52150679A - Checking method for action of depreciation type smoke detector - Google Patents

Checking method for action of depreciation type smoke detector

Info

Publication number
JPS52150679A
JPS52150679A JP6811076A JP6811076A JPS52150679A JP S52150679 A JPS52150679 A JP S52150679A JP 6811076 A JP6811076 A JP 6811076A JP 6811076 A JP6811076 A JP 6811076A JP S52150679 A JPS52150679 A JP S52150679A
Authority
JP
Japan
Prior art keywords
action
smoke detector
checking method
type smoke
depreciation type
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.)
Pending
Application number
JP6811076A
Other languages
Japanese (ja)
Inventor
Kuniharu Tatezuki
Toru Kahara
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP6811076A priority Critical patent/JPS52150679A/en
Publication of JPS52150679A publication Critical patent/JPS52150679A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274—Calibration, base line adjustment, drift correction

Abstract

PURPOSE:To simply check the action of smoke detector which delivers output according to depreciation of quantity of light accepted by light acceptor when smoke flows in between light projector and acceptor that are placed in opposition each other, by laying a filter of a specified transmissivity on the optical path, as possible to freely insert or remove.
JP6811076A 1976-06-09 1976-06-09 Checking method for action of depreciation type smoke detector Pending JPS52150679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6811076A JPS52150679A (en) 1976-06-09 1976-06-09 Checking method for action of depreciation type smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6811076A JPS52150679A (en) 1976-06-09 1976-06-09 Checking method for action of depreciation type smoke detector

Publications (1)

Publication Number Publication Date
JPS52150679A true JPS52150679A (en) 1977-12-14

Family

ID=13364259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6811076A Pending JPS52150679A (en) 1976-06-09 1976-06-09 Checking method for action of depreciation type smoke detector

Country Status (1)

Country Link
JP (1) JPS52150679A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH023890A (en) * 1988-06-22 1990-01-09 Nohmi Bosai Ltd Level adjusting device for light-reducing fire alarm device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH023890A (en) * 1988-06-22 1990-01-09 Nohmi Bosai Ltd Level adjusting device for light-reducing fire alarm device

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