CA1111124A - Fluid level detector test switch - Google Patents

Fluid level detector test switch

Info

Publication number
CA1111124A
CA1111124A CA347,238A CA347238A CA1111124A CA 1111124 A CA1111124 A CA 1111124A CA 347238 A CA347238 A CA 347238A CA 1111124 A CA1111124 A CA 1111124A
Authority
CA
Canada
Prior art keywords
amplifier
control circuit
level detector
safety test
probe
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
CA347,238A
Other languages
English (en)
French (fr)
Inventor
James I. Bartels
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.)
Honeywell Inc
Original Assignee
Honeywell 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 Honeywell Inc filed Critical Honeywell Inc
Application granted granted Critical
Publication of CA1111124A publication Critical patent/CA1111124A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • G01R31/2829—Testing of circuits in sensor or actuator systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/241—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid for discrete levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7287—Liquid level responsive or maintaining systems
    • Y10T137/7306—Electrical characteristic sensing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
CA347,238A 1979-03-21 1980-03-07 Fluid level detector test switch Expired CA1111124A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/022,581 US4224606A (en) 1979-03-21 1979-03-21 Fluid level detector test switch
US022,581 1979-03-21

Publications (1)

Publication Number Publication Date
CA1111124A true CA1111124A (en) 1981-10-20

Family

ID=21810322

Family Applications (1)

Application Number Title Priority Date Filing Date
CA347,238A Expired CA1111124A (en) 1979-03-21 1980-03-07 Fluid level detector test switch

Country Status (5)

Country Link
US (1) US4224606A (en, 2012)
JP (1) JPS55128122A (en, 2012)
CA (1) CA1111124A (en, 2012)
DE (1) DE3010721C2 (en, 2012)
GB (1) GB2045933B (en, 2012)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322847A (en) * 1980-03-10 1982-03-30 International Business Machines Corporation Automatic indirect testing to verify operational control
US4356406A (en) * 1981-02-17 1982-10-26 Honeywell Inc. Conductive fluid probe powering means
DE3148383C2 (de) * 1981-12-07 1989-11-23 Adam Opel AG, 6090 Rüsselsheim Vorrichtung zur Messung der Flüssigkeitsfüllmenge in einem Behälter
FR2531543A1 (fr) * 1982-08-05 1984-02-10 Commissariat Energie Atomique Dispositif de securite et de detection d'un liquide conducteur dans une enceinte a surveiller
AT383677B (de) * 1983-10-07 1987-08-10 Kessel Loos Kg Bischofshofen Pruefeinrichtung zur ueberpruefung einer fluessigkeitsmangelsicherung
US4565930A (en) * 1984-06-01 1986-01-21 Honeywell, Inc. Boiler low water sensing system utilizing energy transfer network means for delay
JPH0355104Y2 (en, 2012) * 1986-07-31 1991-12-06
US5239203A (en) * 1990-03-30 1993-08-24 Texand Corporation Common ground control switch for an irrigation system
US5196729A (en) * 1990-03-30 1993-03-23 Thorngren John T Liquid activated control switch
US5438323A (en) * 1993-06-14 1995-08-01 Scully Signal Company Fail safe fluid level detection circuit
US5446444A (en) * 1993-12-17 1995-08-29 Robertshaw Controls Company Capacitive threshold detector test circuit
US5874895A (en) * 1996-11-15 1999-02-23 International Business Machines Corporation Method and apparatus for testing operation of a sensor controlled device
US5838241A (en) * 1996-12-18 1998-11-17 Robertshaw Controls Company Liquid level transmitter
US6046392A (en) * 1997-05-28 2000-04-04 Saul; Victor D. Stringed musical instrument frame having interchangeable soundboard and neck assembly
GB9915254D0 (en) * 1999-07-01 1999-09-01 Smiths Industries Plc Fluid-gauging systems and methods
US6688329B2 (en) * 2001-07-06 2004-02-10 C. Cowles & Company Water feeder controller for boiler
US6650128B2 (en) * 2002-02-19 2003-11-18 Tyco Flow Control Method and apparatus for circuit fault detection with boiler water level detection system
TW200827643A (en) * 2006-12-20 2008-07-01 Zippy Tech Corp Water-flow control apparatus for ice-making machine
CH702180B1 (de) * 2009-11-02 2015-02-13 Tecan Trading Ag Verfahren zum Testen eines Laborgeräts und entsprechendes Laborgerät.
CN109798951B (zh) * 2017-11-17 2020-10-20 厦门雅迅网络股份有限公司 一种车载油位检测的自矫正电路及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593270A (en) * 1967-07-10 1971-07-13 Richard E Walker Liquid level sensing and indicating system
US3683347A (en) * 1970-01-12 1972-08-08 Illinois Tool Works Remote sensing indicator
US3834357A (en) * 1973-06-07 1974-09-10 Itt Low-water cut off system
DE2510356C2 (de) * 1975-03-10 1984-03-15 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur Überwachung des Flüssigkeitsstandes in einem Behälter
US4007713A (en) * 1975-08-28 1977-02-15 Hydrolevel Corporation Test circuit
US4027172A (en) * 1975-10-02 1977-05-31 Honeywell Inc. Resistive fluid detecting means

Also Published As

Publication number Publication date
US4224606A (en) 1980-09-23
JPH0338530B2 (en, 2012) 1991-06-11
DE3010721C2 (de) 1986-06-05
JPS55128122A (en) 1980-10-03
GB2045933B (en) 1983-04-20
GB2045933A (en) 1980-11-05
DE3010721A1 (de) 1980-10-02

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Legal Events

Date Code Title Description
MKEX Expiry