CA1111124A - Fluid level detector test switch - Google Patents
Fluid level detector test switchInfo
- 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
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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US022,581 | 1979-03-21 | ||
US06/022,581 US4224606A (en) | 1979-03-21 | 1979-03-21 | Fluid level detector test switch |
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)
Families Citing this family (20)
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 (US20080293856A1-20081127-C00150.png) * | 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)
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 |
-
1979
- 1979-03-21 US US06/022,581 patent/US4224606A/en not_active Expired - Lifetime
-
1980
- 1980-03-07 CA CA347,238A patent/CA1111124A/en not_active Expired
- 1980-03-13 GB GB8008568A patent/GB2045933B/en not_active Expired
- 1980-03-20 DE DE3010721A patent/DE3010721C2/de not_active Expired
- 1980-03-21 JP JP3485480A patent/JPS55128122A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
GB2045933B (en) | 1983-04-20 |
JPS55128122A (en) | 1980-10-03 |
DE3010721A1 (de) | 1980-10-02 |
DE3010721C2 (de) | 1986-06-05 |
JPH0338530B2 (US20080293856A1-20081127-C00150.png) | 1991-06-11 |
GB2045933A (en) | 1980-11-05 |
US4224606A (en) | 1980-09-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |