JPS60100641U - Burnout detection device for resistance thermometer - Google Patents
Burnout detection device for resistance thermometerInfo
- Publication number
- JPS60100641U JPS60100641U JP14504784U JP14504784U JPS60100641U JP S60100641 U JPS60100641 U JP S60100641U JP 14504784 U JP14504784 U JP 14504784U JP 14504784 U JP14504784 U JP 14504784U JP S60100641 U JPS60100641 U JP S60100641U
- Authority
- JP
- Japan
- Prior art keywords
- lead wire
- lead
- temperature sensor
- current
- voltage
- 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.)
- Granted
Links
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案に係る装置の第１の実施例を示−す回路
図、第２図は本考案に係る装置の第２の実施例を示す回
路図である。
１・・・定電流源、２・・・導線（第１のリード線）、
−３・・・導線（第２のリード線）、４，７・・・演算
増幅器（信号系）、５・・・導線（第３のリード線）、
６・・・コンパレータ（電流値検出回路）、Ｒｔ・・・
測温抵抗体、Ｒ２，Ｒ，・・・抵抗（電圧検出回路）、
Ｔ・・・電界効果トランジスタ。FIG. 1 is a circuit diagram showing a first embodiment of the device according to the present invention, and FIG. 2 is a circuit diagram showing a second embodiment of the device according to the present invention. 1... Constant current source, 2... Conductor wire (first lead wire),
-3... Conductor wire (second lead wire), 4, 7... Operational amplifier (signal system), 5... Conductor wire (third lead wire),
6... Comparator (current value detection circuit), Rt...
RTD, R2, R,...resistance (voltage detection circuit),
T...Field effect transistor.
Claims (1)
ード線２，３のいずれか−、方の；ノード線２を介して
該測温抵抗体に供給した電流１を該測温抵抗体の第１、
第２のリード線の他方のリード線３を介して取り出すよ
うにして前記測温抵抗体Ｒｔに電流■を供給するととも
に、前記第１のリード線２と第３のリード線５とを介し
て前記測温抵抗体ＲＹの両端間電圧を検出し、この検出
結果に基づいて前記測温抵抗体が設けられている箇所の
温度を測定する演算増幅器５を含む測定回路と、前記第
１のリード線２の電圧と基準電圧とを比較し、前記第１
、第２のリード線２，３に流れる電流の大きさが所定の
値より小さくなったときに前記第１、第２のリード線２
，３の少なくとも一方が断線したことを示す信号を出力
して前記測温抵抗体Ｒｔの出力を処理する前記測定回路
の信号系中の測定信号を大幅に増加または減少させる電
流値検出回路（コンパレータ６）と、前記第３のリード
線５が断線したとき、この第３のリード線５が入力され
る測定回路の入力端子に所定の別電圧（十Ｖまたは−Ｖ
）を供給し前記測定回路の−測定信号を大幅に減少また
は増加きせる回路とを具備したことを特徴とする抵抗温
度計のバーンアウト検知装置。The current 1 supplied to the resistance temperature sensor Rt via the node wire 2 of either the first or second lead wire 2 or 3 connected to both ends of the resistance temperature sensor Rt is connected to the resistance temperature sensor Rt. The first temperature resistor,
A current is supplied to the resistance temperature sensor Rt through the other lead wire 3 of the second lead wire, and a current is supplied through the first lead wire 2 and the third lead wire 5. a measuring circuit including an operational amplifier 5 that detects a voltage across the temperature-measuring resistor RY and measures a temperature at a location where the temperature-measuring resistor is provided based on the detection result; and the first lead. The voltage on line 2 is compared with the reference voltage, and the first
, when the magnitude of the current flowing through the second lead wires 2 and 3 becomes smaller than a predetermined value, the first and second lead wires 2
. 6) When the third lead wire 5 is disconnected, a predetermined separate voltage (10 V or -V) is applied to the input terminal of the measurement circuit to which the third lead wire 5 is input.
) and a circuit for significantly reducing or increasing the measurement signal of the measurement circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14504784U JPS60100641U (en) | 1984-09-27 | 1984-09-27 | Burnout detection device for resistance thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14504784U JPS60100641U (en) | 1984-09-27 | 1984-09-27 | Burnout detection device for resistance thermometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60100641U true JPS60100641U (en) | 1985-07-09 |
| JPS6244350Y2 JPS6244350Y2 (en) | 1987-11-21 |
Family
ID=30323290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14504784U Granted JPS60100641U (en) | 1984-09-27 | 1984-09-27 | Burnout detection device for resistance thermometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60100641U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010048733A (en) * | 2008-08-25 | 2010-03-04 | Yokogawa Electric Corp | Control circuit |
-
1984
- 1984-09-27 JP JP14504784U patent/JPS60100641U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010048733A (en) * | 2008-08-25 | 2010-03-04 | Yokogawa Electric Corp | Control circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6244350Y2 (en) | 1987-11-21 |
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