JPS5494374A - Thermocouple disconnection detecting device - Google Patents
Thermocouple disconnection detecting deviceInfo
- Publication number
- JPS5494374A JPS5494374A JP57478A JP57478A JPS5494374A JP S5494374 A JPS5494374 A JP S5494374A JP 57478 A JP57478 A JP 57478A JP 57478 A JP57478 A JP 57478A JP S5494374 A JPS5494374 A JP S5494374A
- Authority
- JP
- Japan
- Prior art keywords
- thermocouple
- disconnection
- computer
- disconnection detecting
- signal
- 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
Links
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
PURPOSE: To enable stable disconnection detection and transmit analog data securely to the computer, by connecting the thermocouple to a detecting circuit through a relay.
CONSTITUTION: Mercury relays 5, 6 are changed over at specified timing. When a thermocouple 4 is disconnected, no curent flows through the relays 5, 6, and a disconnection detecting circuit 7 operates. As a result, a photo coupler 9 is coupled, so that a disconnection detecting signal is held in a decoder circuit 10. This signal inhibits a gate 11 which outputs the data from an AD converter 3 into the computer. Only a sine bit corresponding to minus overflow signal is sent out as a true value into the computer, and the disconnection of the thermocouple is determined.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57478A JPS5494374A (en) | 1978-01-09 | 1978-01-09 | Thermocouple disconnection detecting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57478A JPS5494374A (en) | 1978-01-09 | 1978-01-09 | Thermocouple disconnection detecting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5494374A true JPS5494374A (en) | 1979-07-26 |
Family
ID=11477473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57478A Pending JPS5494374A (en) | 1978-01-09 | 1978-01-09 | Thermocouple disconnection detecting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5494374A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6342435A (en) * | 1986-08-07 | 1988-02-23 | Matsushita Electric Ind Co Ltd | Temperature detecting circuit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51140750A (en) * | 1975-05-30 | 1976-12-03 | Yokogawa Hokushin Electric Corp | Detection end discontinuation monitor |
-
1978
- 1978-01-09 JP JP57478A patent/JPS5494374A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51140750A (en) * | 1975-05-30 | 1976-12-03 | Yokogawa Hokushin Electric Corp | Detection end discontinuation monitor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6342435A (en) * | 1986-08-07 | 1988-02-23 | Matsushita Electric Ind Co Ltd | Temperature detecting circuit |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5494374A (en) | Thermocouple disconnection detecting device | |
JPS536856A (en) | Digital protective relay inspection system | |
JPS5261743A (en) | Protective relay equipment | |
JPS52130221A (en) | Ringing detection circuit in telephone exchanger | |
JPS52142A (en) | Buffer circuit | |
JPS54158101A (en) | Individual incoming system | |
JPS534187A (en) | Liquid controlling relay | |
JPS52152051A (en) | Elevator signal transmitting device | |
JPS535673A (en) | Alarm electronic watch | |
JPS5537644A (en) | Input-output circuit of microcomputer | |
JPS5326501A (en) | Signal level conversion circuit | |
JPS5414644A (en) | Detection system for trouble of buffer memory circuit | |
JPS5374251A (en) | Power flow detecting device | |
JPS53130079A (en) | Disconnection detecting relay | |
JPS5375764A (en) | Automatic wire bonding unit | |
JPS52133234A (en) | Judging circuit | |
JPS54109341A (en) | Data transmission system | |
JPS5425449A (en) | Protective realy | |
JPS559203A (en) | Clearing system for error information register | |
JPS5339832A (en) | Binary circuit | |
JPS52109818A (en) | Color manuscript processing unit | |
JPS5659335A (en) | Bus check system | |
JPS53110037A (en) | Protective realy system | |
JPS52125216A (en) | Synchronous signal transmission system | |
JPS5377127A (en) | Detecting circuit |