CN86200112U - Misoperation indicating device for universal meter - Google Patents
Misoperation indicating device for universal meter Download PDFInfo
- Publication number
- CN86200112U CN86200112U CN 86200112 CN86200112U CN86200112U CN 86200112 U CN86200112 U CN 86200112U CN 86200112 CN86200112 CN 86200112 CN 86200112 U CN86200112 U CN 86200112U CN 86200112 U CN86200112 U CN 86200112U
- Authority
- CN
- China
- Prior art keywords
- universal meter
- indicating device
- misoperation
- electric
- maloperation
- 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.)
- Ceased
Links
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a misoperation indicating device for a universal meter. The misoperation indicating device for a universal meter is an additional device for the universal meter. When the universal meter is operated wrong, such as the grade of an electric current is used for measuring electric voltage, or when an electric pen is also inserted in the jack of a high current, the electric pen is used for measuring the electric voltage, optical acoustical signals are sent out and indicate the misoperation or alarm. The switch of an original universal meter is improved; the jack of a high current is increased with an insertion switch; an LED or a sounder is used for indicating and alarming.
Description
Technical field: instrument
Can damage instrument and equipment during the universal electric meter maloperation, along with the development of electronic devices and components, universal electric meter maloperation indicating device can have been realized.The light emitting diode power consumption of widespread use at present is very little, and only several milliwatts are for universal electric meter maloperation indicating device has been set up the basis.
Purpose: when during universal electric meter uses maloperation taking place, send the signal indication, try to avert accidents.
Universal electric meter in use has two class maloperations, and a class is with milliampere, microampere or end resistance ohms range measuring voltage; Another kind of is that selector switch has forwarded the high voltage shelves to, but test pencil also is inserted in big current gear, is used for measuring voltage.For preventing that this two classes maloperation from taking place, and adopts Fig. 1 circuit.When universal electric meter during at current gear or low resistance ohmic shelves, 1,2 liang of conducting strip is connected, and lights green LED, in order to the prompting operation state.Adopt Fig. 2 circuit, selector switch is when voltage gear, and 6,7 connect, if test pencil is inserted in big electric current socket (at this moment multimeter is equivalent to a very small resistor, and the external potential circuit of meeting causes short circuit), switch 10 is connected, so light red light emitting diodes, with the announcement of warning.Can also add acoustics among Fig. 2, give a warning with sound.
Current multimeter does not all have this two kinds of indicators, and a carelessness has just been burnt multimeter slightly, and for the skilled operation personnel, the gear selecting switch is fallibility not.Owing to seldom measure big electric current, do not form a habit, easily test pencil is inserted in the big electric current socket sometimes and measures high voltage, cause short circuit accident.Multimeter has increased these two kinds of maloperation indicating devices and just can prevent this class accident to take place.
Description of drawings: among Fig. 1 the 1, the 2nd, two conducting bridges that in multitester conversion switch, increase, the universal switch gear selecting is connected when microampere, milliampere, ohms range; The 3rd, light emitting diode; The 4th, battery in the multimeter; The 5th, resistance.Among Fig. 2 the 6, the 7th, two conducting bridges that increase in the multitester conversion switch, the multimeter gear selecting is connected when alternating voltage or DC voltage: the 8th, battery in the multimeter; The 9th, resistance; The 10th, the insertion switch that big electric current jack is set up is connected when in the jack plug being arranged, and disconnects during no plug; The 11st, red light emitting diodes.
Implement an example: as shown in Figure 1, 2, resistance 5,9 resistances are that battery 4,8 is 1.5 volts in 250 ohmmeters.
Claims (2)
1, universal electric meter maloperation indicating device is prompting operation person when the universal electric meter maloperation, sends light to the operator, and the device of audible alert is characterized in that:
A, a part are by conducting bridge 1,2, light emitting diode 3, and battery 4 and resistance 5 constitute.
B, another part are by conducting bridge 6,7, battery 8, and resistance 9 inserts switch 10 and light emitting diode 11 constitutes.
2, indicating device as claimed in claim 1 is characterized in that the affix audible alarm unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86200112 CN86200112U (en) | 1986-01-07 | 1986-01-07 | Misoperation indicating device for universal meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86200112 CN86200112U (en) | 1986-01-07 | 1986-01-07 | Misoperation indicating device for universal meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86200112U true CN86200112U (en) | 1987-02-25 |
Family
ID=4804218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86200112 Ceased CN86200112U (en) | 1986-01-07 | 1986-01-07 | Misoperation indicating device for universal meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86200112U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003098237A1 (en) * | 2002-05-22 | 2003-11-27 | Hunghey Electronics (Shanghai) Co. Ltd. | Digital multimeter with misoperation preventing function |
| CN110568241A (en) * | 2019-09-30 | 2019-12-13 | 贵州电网有限责任公司 | anti-misoperation multimeter and use method thereof |
-
1986
- 1986-01-07 CN CN 86200112 patent/CN86200112U/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003098237A1 (en) * | 2002-05-22 | 2003-11-27 | Hunghey Electronics (Shanghai) Co. Ltd. | Digital multimeter with misoperation preventing function |
| CN110568241A (en) * | 2019-09-30 | 2019-12-13 | 贵州电网有限责任公司 | anti-misoperation multimeter and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |