GB1427385A - Blank value storing photometer - Google Patents

Blank value storing photometer

Info

Publication number
GB1427385A
GB1427385A GB1643773A GB1643773A GB1427385A GB 1427385 A GB1427385 A GB 1427385A GB 1643773 A GB1643773 A GB 1643773A GB 1643773 A GB1643773 A GB 1643773A GB 1427385 A GB1427385 A GB 1427385A
Authority
GB
United Kingdom
Prior art keywords
signal
circuit
decaying
during
calibration
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.)
Expired
Application number
GB1643773A
Other languages
English (en)
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.)
Coulter Electronics Inc
Original Assignee
Coulter Electronics Inc
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 Coulter Electronics Inc filed Critical Coulter Electronics Inc
Publication of GB1427385A publication Critical patent/GB1427385A/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
GB1643773A 1972-04-07 1973-04-05 Blank value storing photometer Expired GB1427385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24204972A 1972-04-07 1972-04-07

Publications (1)

Publication Number Publication Date
GB1427385A true GB1427385A (en) 1976-03-10

Family

ID=22913260

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1643773A Expired GB1427385A (en) 1972-04-07 1973-04-05 Blank value storing photometer

Country Status (11)

Country Link
US (1) US3752995A (en, 2012)
JP (1) JPS5220277B2 (en, 2012)
AU (1) AU473520B2 (en, 2012)
CA (1) CA986332A (en, 2012)
DE (1) DE2317103C3 (en, 2012)
FR (1) FR2179153B1 (en, 2012)
GB (1) GB1427385A (en, 2012)
IL (1) IL41955A (en, 2012)
IT (1) IT980113B (en, 2012)
NL (1) NL7304703A (en, 2012)
SE (1) SE378911B (en, 2012)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887473A (en) * 1971-09-07 1975-06-03 Bergishagen & Associates Method and system for the infrared analysis of gases
US3970392A (en) * 1973-07-27 1976-07-20 Coulter Electronics, Inc. Analog to digital to analog storage and retrieval for a plurality of photometric blanking values
US3952206A (en) * 1974-05-09 1976-04-20 Coulter Electronics, Inc. Photometer circuit
US3937577A (en) * 1974-05-15 1976-02-10 E. I. Du Pont De Nemours And Company Zeeman effect atomic absorption spectrometer
CH568564A5 (en, 2012) * 1974-06-10 1975-10-31 Killer W Dr Ag
FI52255C (fi) * 1975-10-30 1977-07-11 Innotec Oy Infrapuna-analysaattori.
JPS6013136B2 (ja) * 1977-05-26 1985-04-05 オリンパス光学工業株式会社 デンシトメ−タの検定方法
US4357105A (en) * 1980-08-06 1982-11-02 Buffalo Medical Specialties Mfg., Inc. Blood diagnostic spectrophotometer
US5958250A (en) * 1995-06-07 1999-09-28 Baxter International Inc. Blood processing systems and methods which optically derive the volume of platelets contained in a plasma constituent
US6312607B1 (en) 1995-06-07 2001-11-06 Baxter International Inc. Blood processing systems and methods which optically monitor incremental platelet volumes in a plasma constituent
WO1998043720A1 (en) * 1997-04-03 1998-10-08 Baxter International Inc. Interface detection and control systems and methods
US6254784B1 (en) 1997-10-30 2001-07-03 Baxter International Inc. Optical interface detection system for centrifugal blood processing
JP6250053B2 (ja) 2012-09-04 2017-12-20 フェンウォール、インコーポレイテッド 血液処理システムの境界検知装置
US10561784B2 (en) 2017-05-31 2020-02-18 Fenwal, Inc. Stationary optical monitoring system for blood processing system
EP4035700B1 (en) 2021-01-29 2025-03-05 Fenwal, Inc. Automated splitting of a fluid into uneven volumes
US11898967B2 (en) 2021-02-02 2024-02-13 Fenwal, Inc. Predicting malfunction and failure of centrifuge umbilicus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4419900Y1 (en, 2012) * 1966-12-09 1969-08-26
US3566133A (en) * 1968-03-18 1971-02-23 Coulter Electronics A hemoglobin measuring method and apparatus having voltage following with feedback
US3622795A (en) * 1968-10-10 1971-11-23 Coulter Electronics Colorimetric fluid test apparatus having plural fluid sequential control
US3632209A (en) * 1970-04-28 1972-01-04 Susquehanna Corp System for measuring light transmittance through absorptive or diffusive media
US3703336A (en) * 1970-06-12 1972-11-21 Instrumentation Labor Inc Analysis system employing a plural chamber cuvette structure

Also Published As

Publication number Publication date
FR2179153A1 (en, 2012) 1973-11-16
CA986332A (en) 1976-03-30
JPS5220277B2 (en, 2012) 1977-06-02
IL41955A0 (en) 1973-06-29
AU473520B2 (en) 1976-06-24
IL41955A (en) 1975-10-15
SE378911B (en, 2012) 1975-09-15
JPS49101081A (en, 2012) 1974-09-25
DE2317103C3 (de) 1976-01-08
US3752995A (en) 1973-08-14
FR2179153B1 (en, 2012) 1976-09-24
IT980113B (it) 1974-09-30
AU5418473A (en) 1974-10-10
DE2317103A1 (de) 1973-10-11
DE2317103B2 (de) 1975-05-15
NL7304703A (en, 2012) 1973-10-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee