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JPS57175209A - Malfunction detector of display meter - Google Patents

Malfunction detector of display meter

Info

Publication number
JPS57175209A
JPS57175209A JP6185281A JP6185281A JPS57175209A JP S57175209 A JPS57175209 A JP S57175209A JP 6185281 A JP6185281 A JP 6185281A JP 6185281 A JP6185281 A JP 6185281A JP S57175209 A JPS57175209 A JP S57175209A
Authority
JP
Japan
Prior art keywords
circuit
display
circuits
signal
driving
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
JP6185281A
Other languages
Japanese (ja)
Inventor
Ryoichi Onohara
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.)
Tokyo Tatsuno Co Ltd
Original Assignee
Tokyo Tatsuno Co 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 Tokyo Tatsuno Co Ltd filed Critical Tokyo Tatsuno Co Ltd
Priority to JP6185281A priority Critical patent/JPS57175209A/en
Publication of JPS57175209A publication Critical patent/JPS57175209A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Measuring Volume Flow (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)

Abstract

PURPOSE:To prevent an erroneous display, by providing a discriminating circuit to detect the correct working of each element of a display device based on the signal given from a display meter driving circuit. CONSTITUTION:When the lubrication is desired for example, a nozzle valve 15 is detached from a nozzle hook 42 to start the lubrication. The lubrication is measured by a flowmeter 12, and the pulse signal is supplied to a 0.1l counter circuit 20. The circuit 20 starts the binary counting with supply of the pulse signal, and the driving signal displaying the figure is produced at seven circuits. This driving signal current flows to either one of the coils 2 and 3 of the seven elements 7 at a 0.1l digit display part 21. Thus a figure corresponding to the signal is displayed. Then the signals supplied from a display meter driving circuit 29 and a temporary storing circuit 22 are fed into exclusive OR circuits 42-48. The OR circuits corresponding to the display elements produce the signals. Then the correct driving is discriminated by the OR circuit 41 via the OR circuits 34-40. In such way, an erroneous display is prevented.
JP6185281A 1981-04-22 1981-04-22 Malfunction detector of display meter Pending JPS57175209A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6185281A JPS57175209A (en) 1981-04-22 1981-04-22 Malfunction detector of display meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6185281A JPS57175209A (en) 1981-04-22 1981-04-22 Malfunction detector of display meter

Publications (1)

Publication Number Publication Date
JPS57175209A true JPS57175209A (en) 1982-10-28

Family

ID=13183034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6185281A Pending JPS57175209A (en) 1981-04-22 1981-04-22 Malfunction detector of display meter

Country Status (1)

Country Link
JP (1) JPS57175209A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419318A (en) * 1987-04-09 1989-01-23 Olympus Optical Co Microscope for operation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017246A (en) * 1973-06-13 1975-02-24
JPS5327858B2 (en) * 1973-01-23 1978-08-10
JPS5396869A (en) * 1977-01-31 1978-08-24 Siemens Ag Presetting apparatus for a quantity of gases or liquids

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5327858B2 (en) * 1973-01-23 1978-08-10
JPS5017246A (en) * 1973-06-13 1975-02-24
JPS5396869A (en) * 1977-01-31 1978-08-24 Siemens Ag Presetting apparatus for a quantity of gases or liquids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419318A (en) * 1987-04-09 1989-01-23 Olympus Optical Co Microscope for operation

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