SE8402259D0 - PROCEDURES FOR ZERO POINT CONTROL AND HEATABILITY MEASUREMENT CELLS - Google Patents

PROCEDURES FOR ZERO POINT CONTROL AND HEATABILITY MEASUREMENT CELLS

Info

Publication number
SE8402259D0
SE8402259D0 SE8402259A SE8402259A SE8402259D0 SE 8402259 D0 SE8402259 D0 SE 8402259D0 SE 8402259 A SE8402259 A SE 8402259A SE 8402259 A SE8402259 A SE 8402259A SE 8402259 D0 SE8402259 D0 SE 8402259D0
Authority
SE
Sweden
Prior art keywords
exposed
zero
sensor
gas
chamber
Prior art date
Application number
SE8402259A
Other languages
Swedish (sv)
Other versions
SE8402259L (en
Inventor
H Loscher
Original Assignee
Heraeus Gmbh W C
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 Heraeus Gmbh W C filed Critical Heraeus Gmbh W C
Publication of SE8402259D0 publication Critical patent/SE8402259D0/en
Publication of SE8402259L publication Critical patent/SE8402259L/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/30—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration
    • C12M41/34—Means for regulation, monitoring, measurement or control, e.g. flow regulation of concentration of gas
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
    • C12M41/48—Automatic or computerized control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4163—Systems checking the operation of, or calibrating, the measuring apparatus

Abstract

To calibrate or set the zero point and eliminate drift from a CO2 sensor 2 exposed to an atmosphere in a chamber 10, for cultivation of biological cells, tissues, or of microorganisms, the sensor includes a reference portion 2a and a measuring portion 2b, and, during a calibrating phase valve 29 causes the reference portion to be exposed via 28 to the same gas which is within the chamber 10, and which is to be measured. The resulting output signal should be zero; if, however, due to drift or other changes in the zero-set of the sensor 2, it is not zero, the resulting output signal is stored and then algebraically added to the output signal derived from the sensor when the reference portion is again exposed to a reference gas of known composition, for example air from 26. The correction signal is subtracted from the signal sensed when the reference portion 2a is exposed to the reference gas, and only the measuring portion 2b is exposed to the gas to be measured, within the chamber. <IMAGE>
SE8402259A 1983-04-26 1984-04-25 ZERO POINT CONTROL OF CONDUCTING METHOD CELLS IN CLEARING CHARGERS NGSBRUTSRENKENEN SE8402259L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833315085 DE3315085C2 (en) 1983-04-26 1983-04-26 Procedure for zero point control on thermal conductivity measuring cells in fumigation incubators

Publications (2)

Publication Number Publication Date
SE8402259D0 true SE8402259D0 (en) 1984-04-25
SE8402259L SE8402259L (en) 1984-10-27

Family

ID=6197395

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8402259A SE8402259L (en) 1983-04-26 1984-04-25 ZERO POINT CONTROL OF CONDUCTING METHOD CELLS IN CLEARING CHARGERS NGSBRUTSRENKENEN

Country Status (5)

Country Link
JP (1) JPS59208447A (en)
DE (1) DE3315085C2 (en)
FR (1) FR2545219A1 (en)
GB (1) GB2138949B (en)
SE (1) SE8402259L (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2237880A (en) * 1989-10-24 1991-05-15 British Gas Plc Determining concentration of pollutant gas in an atmosphere
DE4143092A1 (en) * 1991-12-27 1993-07-01 Bayer Ag GAS TRACK MEASURING SYSTEM
US5623105A (en) * 1992-10-21 1997-04-22 Prolong Systems, Inc. Oxygen/carbon dioxide sensor and controller for a refrigerated controlled atmosphere shipping container
CH686055A5 (en) * 1993-10-14 1995-12-15 Apv Schweiz Ag A method for carrying out an automatic, periodic zero adjustment.
JP3325673B2 (en) * 1993-10-25 2002-09-17 アークレイ株式会社 Method for correcting component concentration in breath and breath analyzer
US5418131A (en) * 1994-04-13 1995-05-23 General Signal Corporation Humidity compensated carbon dioxide gas measurement and control
DE19637520C1 (en) * 1996-09-13 1998-03-12 Heraeus Instr Gmbh Method for zero point adjustment of a thermal conductivity measuring cell for CO¶2¶ measurement in a fumigation incubator
US6588250B2 (en) * 2001-04-27 2003-07-08 Edwards Systems Technology, Inc. Automatic calibration mode for carbon dioxide sensor
JP2004113153A (en) * 2002-09-27 2004-04-15 Sanyo Electric Co Ltd Co2 incubator
JP2008220235A (en) * 2007-03-12 2008-09-25 Sanyo Electric Co Ltd Culture apparatus
CN109946429A (en) * 2019-03-27 2019-06-28 合肥皓天智能科技有限公司 A kind of novel intelligent carbon dioxide control device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2924446C2 (en) * 1979-06-18 1982-09-16 W.C. Heraeus Gmbh, 6450 Hanau Method and device for culturing cells and tissues of humans and animals or of microorganisms
DE3047601A1 (en) * 1980-12-17 1982-07-22 Leybold-Heraeus GmbH, 5000 Köln Thermal conductivity detector in gas analyser - is preceded by heat exchanger to stabilise temp. of incoming gas to that of detector casing

Also Published As

Publication number Publication date
GB2138949A (en) 1984-10-31
DE3315085A1 (en) 1984-10-31
FR2545219A1 (en) 1984-11-02
JPH0350978B2 (en) 1991-08-05
DE3315085C2 (en) 1985-09-05
GB8410531D0 (en) 1984-05-31
JPS59208447A (en) 1984-11-26
GB2138949B (en) 1986-08-28
SE8402259L (en) 1984-10-27

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