CN110568241A - anti-misoperation multimeter and use method thereof - Google Patents
anti-misoperation multimeter and use method thereof Download PDFInfo
- Publication number
- CN110568241A CN110568241A CN201910937728.XA CN201910937728A CN110568241A CN 110568241 A CN110568241 A CN 110568241A CN 201910937728 A CN201910937728 A CN 201910937728A CN 110568241 A CN110568241 A CN 110568241A
- Authority
- CN
- China
- Prior art keywords
- circuit
- multimeter
- pen
- gear
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 66
- 238000012360 testing method Methods 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims description 22
- 230000002265 prevention Effects 0.000 claims description 22
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 238000012790 confirmation Methods 0.000 claims description 6
- 238000013102 re-test Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 6
- 241001422033 Thestylus Species 0.000 abstract description 4
- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
- 208000014674 injury Diseases 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/12—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
- G01R15/125—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will for digital multimeters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses an anti-misoperation multimeter and a use method thereof, wherein the anti-misoperation multimeter comprises an anti-misoperation plate, the anti-misoperation plate is arranged on a shell of the multimeter, the anti-misoperation plate is provided with an anti-misoperation plate protection circuit, the anti-misoperation plate protection circuit comprises a contact monitoring circuit, a stylus voltage AD conversion circuit, a CPU monitoring circuit, a test circuit, a voice broadcast circuit and an LED indicating circuit, the contact monitoring circuit, the stylus voltage AD conversion circuit, the test circuit, the voice broadcast circuit and the LED indicating circuit are connected to the CPU monitoring circuit, the contact monitoring circuit is connected to a stylus jack, a red stylus and a black stylus of the multimeter, and the stylus voltage AD conversion circuit and the test circuit are connected to the red stylus and the black stylus. The digital multimeter using the protection circuit can effectively guide a user to correctly use the multimeter, effectively prevent various accidents caused by misoperation, including damage to the multimeter, personal injury and the like.
Description
Technical Field
The invention belongs to the technical field of anti-misoperation equipment of multimeters, and relates to an anti-misoperation multimeter and a use method thereof.
Background
the universal meter has powerful functions, is light and portable, and is widely applied to various electrician industries. But current universal meter lacks the function of preventing mistake, and easy in use causes the accident occasionally because of the misuse, if in measuring the malfunctioning exit contact voltage process of circuit breaker protection, the mistake is measured universal meter resistance shelves as the voltage shelves, leads to the malfunctioning exit contact short circuit of circuit breaker protection, causes the malfunctioning protection to start, trips the switch, and similar this kind of accident has been reacted many times in electric power system.
disclosure of Invention
the technical problem to be solved by the invention is as follows: the utility model provides a multimeter and a using method thereof for preventing misoperation, which are used for solving the problems in the prior art.
The technical scheme adopted by the invention is as follows: the utility model provides a prevent maloperation's universal meter, including preventing the mistake board, prevent that the mistake board is installed on the casing of universal meter, prevent being provided with on the mistake board and prevent mistake board protection circuit, prevent mistake board protection circuit including contact monitoring circuit, pen-shape metre voltage AD converting circuit, CPU monitoring circuit, test circuit, voice broadcast circuit and LED indicating circuit, contact monitoring circuit, pen-shape metre voltage AD converting circuit, test circuit, voice broadcast circuit and LED indicating circuit are connected to CPU monitoring circuit, contact monitoring circuit is connected to universal meter pen-shape metre jack, red pen-shape metre and black pen-shape metre, pen-shape metre voltage AD converting circuit and test circuit all are connected to red pen-shape metre and black pen-shape metre.
The CPU monitoring circuit has a microprocessor.
A method of using a multimeter for preventing misoperations, the method comprising the steps of:
step 1, installing an error prevention plate on a multimeter, arranging a monitoring contact circuit, a test circuit, an AD conversion circuit, a CPU monitoring circuit, a voice broadcasting circuit and an LED indicating circuit on the error prevention plate, and sharing a power supply with the multimeter by the error prevention plate;
Step 2, when a universal meter is used for measurement, a power switch of the universal meter is pressed down, and the error prevention board protection circuit is started;
Step 3, the CPU monitoring circuit analyzes according to a contact logic signal returned by the contact circuit, judges the plug insertion correctness of the current multimeter stylus and prompts which type of measurement the current multimeter is used for according to the jack in which the plug is inserted;
step 4, after the error prevention board circuit starts working, monitoring whether a meter pen plug is inserted into a meter pen jack of the multimeter or not, and after the meter pen jack of the multimeter is normally inserted into the plug, prompting a user of the currently measured measurement type by the CPU monitoring circuit according to a logic signal provided by the contact monitoring circuit;
Step 5, after monitoring whether the jacks of the multimeter are correctly inserted, if the CPU monitoring circuit is V/omega or COM according to the returned logic type, prompting a user to insert the other end of the test pen into a corresponding jack of the error prevention plate;
step 6, when the jacks V/omega and COM of the multimeter are normally inserted and the gears are shifted to corresponding gears, the CPU monitoring circuit automatically starts the AD conversion circuit to monitor the voltage of the meter pen after the jacks of the error prevention board are normally inserted;
Step 7, when the multimeter is in a voltage range or a current range, the meter pen does not have voltage output; the method comprises the following steps that the multimeter is in a resistance gear or an on-off gear, a voltage output is arranged on a meter pen, the voltage of the meter pen is monitored through the method, and whether the current gear is in the voltage gear or the resistance/on-off gear is clearly distinguished;
Step 8, after the CPU monitoring circuit starts the AD conversion circuit, the obtained measured voltage value is lower than a judgment value, the voice prompt circuit prompts that the current measurement is a voltage test, and a voice broadcast prompt tone 'test gear is a voltage test gear, please confirm';
Step 9, if the monitored voltage value is larger than the judgment value, prompting that the current gear is a resistance gear or a time on-off gear, and automatically carrying out on-off test for set time, wherein the current gear is a resistance gear or a time on-off gear, and the voice broadcast prompting sound is 'a test gear is a resistance/on-off gear', the voice broadcast is actively prompted after the drive circuit finishes measuring the set time, and the prompting sound is 'a sound of a buzzer of a universal meter', and the current gear is an on-off gear; if not, the resistance is a resistance file, please confirm, and retest the please ampere test button ";
step 10, after all operations are finished, a user must wait for confirmation, and then the error-preventing board meter pen can be pulled out for relevant tests;
step 11, if the test pen is not pulled out for a long time for measurement after confirmation, the CPU monitoring circuit can actively sound, and after 10 times of continuous measurement, the power supply circuit can be actively cut off for protection operation;
step 12, if the whole measurement is completed, the power supply of the multimeter is turned off, and meanwhile, the stylus of the multimeter is inserted into the jack of the anti-error board, so that the multimeter can be stored and tested next time.
the invention has the beneficial effects that: compared with the prior art, the anti-misoperation board is additionally arranged on the existing multimeter, the anti-misoperation board is provided with the contact monitoring circuit, the meter pen voltage AD conversion circuit, the CPU monitoring circuit (comprising a microprocessor), the test circuit, the voice broadcast circuit and the LED indicating circuit, the CPU monitoring circuit carries out logic analysis judgment and voice prompt on the input contact monitoring signal through signals collected by the electric shock monitoring circuit and the meter pen voltage AD conversion circuit, whether the AD conversion circuit is started to measure the voltage of the meter pen point of the multimeter is determined according to the type of the input contact signal, and the digital multimeter using the protection circuit can effectively guide a user to correctly use the multimeter, effectively prevent various accidents caused by misoperation, including damage of the multimeter, personal injury and the like.
Drawings
FIG. 1 is a schematic design view of a mis-operation prevention multimeter of the present invention;
FIG. 2 is a functional block diagram of an anti-tamper multimeter of the present invention;
Detailed Description
the invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 1-2, a prevent universal meter of maloperation, including preventing the mistake board, prevent that the mistake board is installed on the casing of universal meter, prevent being provided with on the mistake board and prevent mistake board protection circuit, prevent mistake board protection circuit including contact monitoring circuit, pen-shape metre voltage AD converting circuit, CPU monitoring circuit, test circuit, voice broadcast circuit and LED indicating circuit, contact monitoring circuit, pen-shape metre voltage AD converting circuit, test circuit, voice broadcast circuit and LED indicating circuit are connected to CPU monitoring circuit, contact monitoring circuit is connected to universal meter pen-shape metre jack, red pen-shape metre and black pen-shape metre, pen-shape metre voltage AD converting circuit and test circuit all are connected to red pen-shape metre and black pen-shape metre.
The CPU monitoring circuit has a microprocessor.
the invention adds an anti-misoperation plate on the basis of the existing multimeter, shares a power supply with the multimeter in a serial connection mode, and the anti-misoperation plate protection circuit mainly comprises a contact monitoring circuit, a meter pen voltage AD conversion circuit, a CPU monitoring circuit (including a microprocessor), a test circuit, a voice broadcasting circuit, an LED indicating circuit and the like. Each jack in the anti-misoperation board protection circuit contains a contact switch, and when a meter pen plug or a meter pen head is inserted into the corresponding jack, corresponding logic level can be output after the contact is connected, so that the CPU monitoring circuit can recognize the logic level conveniently. The CPU monitoring circuit carries out logic analysis on the input contact monitoring signal and outputs a corresponding voice prompt; and the CPU (including a microprocessor) controls whether to start the AD conversion circuit to measure the voltage of the multimeter meter pen head according to the type of the input contact signal. The digital multimeter using the protection circuit can effectively guide a user to correctly use the multimeter, effectively prevent various accidents caused by misoperation, including damage to the multimeter, personal injury and the like.
Example 2: a method of using a multimeter for preventing misoperations, the method comprising the steps of:
step 1, installing an error prevention plate on a multimeter, arranging a monitoring contact circuit, a test circuit, an AD conversion circuit, a CPU monitoring circuit, a voice broadcasting circuit and an LED indicating circuit on the error prevention plate, and sharing a power supply with the multimeter by the error prevention plate;
Step 2, when a universal meter is used for measurement, a power switch of the universal meter is pressed down, and the error prevention board protection circuit is started;
Step 3, the CPU monitoring circuit analyzes according to a contact logic signal returned by the contact circuit, judges the plug insertion correctness of the current multimeter stylus and prompts which type of measurement the current multimeter is used for according to the jack in which the plug is inserted;
Step 4, after the error prevention board circuit starts working, monitoring whether a meter pen plug is inserted into a meter pen jack of the multimeter or not, and after the meter pen jack of the multimeter is normally inserted into the plug, prompting a user of the currently measured measurement type by the CPU monitoring circuit according to a logic signal provided by the contact monitoring circuit, wherein the specific implementation is as shown in table 1;
TABLE 1 measurement types corresponding to jacks
Step 5, after monitoring whether the jacks of the multimeter are correctly inserted, if the CPU monitoring circuit is V/omega or COM according to the returned logic type, prompting a user to insert the other end of the test pen into a corresponding jack of the error prevention plate; the inserting holes of the pen points of the anti-misoperation board meter are as shown in the table 2;
TABLE 2 relationship between insertion holes of pen point of error-proof board meter
| red jack | Black jack | Voice prompt | flashing light | according to operation after voice prompt |
| is free of | is free of | error-proof board non-meter pen insertion | flicker (flicker) | Inserted meter pen |
| Is provided with | Is free of | anti-misoperation plate only inserting red meter pen | Flicker (flicker) | Inserting black meter pen |
| Is free of | Is provided with | Error-proof plate only black meter pen insertion | flicker (flicker) | inserted red meter pen |
| is provided with | is provided with | Normal insertion of error-proof board meter pen | Long Mie |
step 6, when the jacks V/omega and COM of the multimeter are normally inserted and the gears are shifted to corresponding gears, the CPU monitoring circuit automatically starts the AD conversion circuit to monitor the voltage of the meter pen after the jacks of the error prevention board are normally inserted;
Step 7, when the multimeter is in a voltage range or a current range, the meter pen does not have voltage output; the method comprises the following steps that the multimeter is in a resistance gear or an on-off gear, a voltage output is arranged on a meter pen, the voltage of the meter pen is monitored through the method, and whether the current gear is in the voltage gear or the resistance/on-off gear is clearly distinguished;
Step 8, after the CPU monitoring circuit starts the AD conversion circuit, the obtained measured voltage value is lower than a judgment value, the voice prompt circuit prompts that the current measurement is a voltage test, and a voice broadcast prompt tone 'test gear is a voltage test gear, please confirm';
Step 9, if the monitored voltage value is larger than the judgment value, prompting that the current gear is a resistance gear or a time on-off gear, and automatically carrying out on-off test for set time, wherein the current gear is a resistance gear or a time on-off gear, and the voice broadcast prompting sound is 'a test gear is a resistance/on-off gear', the voice broadcast is actively prompted after the drive circuit finishes measuring the set time, and the prompting sound is 'a sound of a buzzer of a universal meter', and the current gear is an on-off gear; if not, the resistance is a resistance file, please confirm, and retest the please ampere test button ";
Step 10, after all operations are finished, a user must wait for confirmation, and then the error-preventing board meter pen can be pulled out for relevant tests;
step 11, if the test pen is not pulled out for a long time for measurement after confirmation, the CPU monitoring circuit can actively sound, and after 10 times of continuous measurement, the power supply circuit can be actively cut off for protection operation;
step 12, if the whole measurement is completed, the power supply of the multimeter is turned off, and meanwhile, the stylus of the multimeter is inserted into the jack of the anti-error board, so that the multimeter can be stored and tested next time.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.
Claims (3)
1. The utility model provides a prevent universal meter of maloperation which characterized in that: including preventing the mistake board, prevent that the mistake board is installed on the casing of universal meter, prevent being provided with on the mistake board and prevent mistake board protection circuit, prevent mistake board protection circuit including contact monitoring circuit, pen-shape metre voltage AD converting circuit, CPU monitoring circuit, test circuit, voice broadcast circuit and LED indicating circuit, contact monitoring circuit, pen-shape metre voltage AD converting circuit, test circuit, voice broadcast circuit and LED indicating circuit are connected to CPU monitoring circuit, contact monitoring circuit is connected to universal meter pen-shape metre jack, red pen-shape metre and black pen-shape metre, pen-shape metre voltage AD converting circuit and test circuit all are connected to red pen-shape metre and black pen-shape metre.
2. an anti-misoperation multimeter according to claim 1, wherein: the CPU monitoring circuit has a microprocessor.
3. A method of using a multimeter for error protection according to any one of claims 1-2, wherein: the method comprises the following steps:
Step 1, installing an error prevention plate on a multimeter, arranging a monitoring contact circuit, a test circuit, an AD conversion circuit, a CPU monitoring circuit, a voice broadcasting circuit and an LED indicating circuit on the error prevention plate, and sharing a power supply with the multimeter by the error prevention plate;
Step 2, when a universal meter is used for measurement, a power switch of the universal meter is pressed down, and the error prevention board protection circuit is started;
step 3, the CPU monitoring circuit analyzes according to a contact logic signal returned by the contact circuit, judges the plug insertion correctness of the current multimeter stylus and prompts which type of measurement the current multimeter is used for according to the jack in which the plug is inserted;
step 4, after the error prevention board circuit starts working, monitoring whether a meter pen plug is inserted into a meter pen jack of the multimeter or not, and after the meter pen jack of the multimeter is normally inserted into the plug, prompting a user of the currently measured measurement type by the CPU monitoring circuit according to a logic signal provided by the contact monitoring circuit;
step 5, after monitoring whether the jacks of the multimeter are correctly inserted, if the CPU monitoring circuit is V/omega or COM according to the returned logic type, prompting a user to insert the other end of the test pen into a corresponding jack of the error prevention plate;
Step 6, when the jacks V/omega and COM of the multimeter are normally inserted and the gears are shifted to corresponding gears, the CPU monitoring circuit automatically starts the AD conversion circuit to monitor the voltage of the meter pen after the jacks of the error prevention board are normally inserted;
Step 7, when the multimeter is in a voltage range or a current range, the meter pen does not have voltage output; the method comprises the following steps that the multimeter is in a resistance gear or an on-off gear, a voltage output is arranged on a meter pen, the voltage of the meter pen is monitored through the method, and whether the current gear is in the voltage gear or the resistance/on-off gear is clearly distinguished;
Step 8, after the CPU monitoring circuit starts the AD conversion circuit, the obtained measured voltage value is lower than a judgment value, the voice prompt circuit prompts that the current measurement is a voltage test, and a voice broadcast prompt tone 'test gear is a voltage test gear, please confirm';
step 9, if the monitored voltage value is larger than the judgment value, prompting that the current gear is a resistance gear or a time on-off gear, and automatically carrying out on-off test for set time, wherein the current gear is a resistance gear or a time on-off gear, and the voice broadcast prompting sound is 'a test gear is a resistance/on-off gear', the voice broadcast is actively prompted after the drive circuit finishes measuring the set time, and the prompting sound is 'a sound of a buzzer of a universal meter', and the current gear is an on-off gear; if not, the resistance is a resistance file, please confirm, and retest the please ampere test button ";
Step 10, after all operations are finished, a user must wait for confirmation, and then the error-preventing board meter pen can be pulled out for relevant tests;
Step 11, if the test pen is not pulled out for a long time for measurement after confirmation, the CPU monitoring circuit can actively sound, and after 10 times of continuous measurement, the power supply circuit can be actively cut off for protection operation;
And step 12, after the whole measurement is finished, the power supply of the multimeter is turned off, and meanwhile, a pen point of the multimeter is inserted into the jack of the anti-misoperation plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910937728.XA CN110568241A (en) | 2019-09-30 | 2019-09-30 | anti-misoperation multimeter and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910937728.XA CN110568241A (en) | 2019-09-30 | 2019-09-30 | anti-misoperation multimeter and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110568241A true CN110568241A (en) | 2019-12-13 |
Family
ID=68783697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910937728.XA Pending CN110568241A (en) | 2019-09-30 | 2019-09-30 | anti-misoperation multimeter and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110568241A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557722A (en) * | 2020-12-07 | 2021-03-26 | 中国南方电网有限责任公司超高压输电公司梧州局 | Universal oscillograph |
| CN114113770A (en) * | 2021-12-03 | 2022-03-01 | 中国南方电网有限责任公司超高压输电公司广州局 | Voltage detection device and detection method |
| CN117233515A (en) * | 2023-11-13 | 2023-12-15 | 广东电网有限责任公司佛山供电局 | Method and system for measuring state of outlet pressing plate |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200112U (en) * | 1986-01-07 | 1987-02-25 | 夏敬释 | Misoperation indicating device for universal meter |
| JP3069780U (en) * | 1999-12-20 | 2000-06-30 | 三和テスメックス株式会社 | Electric measuring instrument |
| CN2569153Y (en) * | 2002-05-22 | 2003-08-27 | 鸿熙电子(上海)有限公司 | Digital multimeter with anti-misoperation function |
| CN2840056Y (en) * | 2005-11-21 | 2006-11-22 | 郭文信 | The multimeter alarm protecting apparatus |
| CN102565490A (en) * | 2010-12-13 | 2012-07-11 | 苏州宇辉达静电科技有限公司 | Multimeter capable of preventing wrong gear selection |
| CN202421271U (en) * | 2011-12-30 | 2012-09-05 | 优利德科技(中国)有限公司 | Misoperation-preventive multimeter |
| CN204086357U (en) * | 2014-10-08 | 2015-01-07 | 南京铁道职业技术学院 | A kind of multimeter assistant voice report latch device |
| CN104865431A (en) * | 2015-05-08 | 2015-08-26 | 国网山西省电力公司电力科学研究院 | Universal meter measuring gear warning system |
| CN209342794U (en) * | 2018-12-14 | 2019-09-03 | 国家电网有限公司 | The anti-error electroprobe of multimeter |
| CN110208590A (en) * | 2019-05-31 | 2019-09-06 | 师光飞 | A kind of voice prompting protection circuit preventing maloperation damage digital multimeter |
| CN211122998U (en) * | 2019-09-30 | 2020-07-28 | 贵州电网有限责任公司 | Anti-misoperation multimeter |
-
2019
- 2019-09-30 CN CN201910937728.XA patent/CN110568241A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200112U (en) * | 1986-01-07 | 1987-02-25 | 夏敬释 | Misoperation indicating device for universal meter |
| JP3069780U (en) * | 1999-12-20 | 2000-06-30 | 三和テスメックス株式会社 | Electric measuring instrument |
| CN2569153Y (en) * | 2002-05-22 | 2003-08-27 | 鸿熙电子(上海)有限公司 | Digital multimeter with anti-misoperation function |
| CN2840056Y (en) * | 2005-11-21 | 2006-11-22 | 郭文信 | The multimeter alarm protecting apparatus |
| CN102565490A (en) * | 2010-12-13 | 2012-07-11 | 苏州宇辉达静电科技有限公司 | Multimeter capable of preventing wrong gear selection |
| CN202421271U (en) * | 2011-12-30 | 2012-09-05 | 优利德科技(中国)有限公司 | Misoperation-preventive multimeter |
| CN204086357U (en) * | 2014-10-08 | 2015-01-07 | 南京铁道职业技术学院 | A kind of multimeter assistant voice report latch device |
| CN104865431A (en) * | 2015-05-08 | 2015-08-26 | 国网山西省电力公司电力科学研究院 | Universal meter measuring gear warning system |
| CN209342794U (en) * | 2018-12-14 | 2019-09-03 | 国家电网有限公司 | The anti-error electroprobe of multimeter |
| CN110208590A (en) * | 2019-05-31 | 2019-09-06 | 师光飞 | A kind of voice prompting protection circuit preventing maloperation damage digital multimeter |
| CN211122998U (en) * | 2019-09-30 | 2020-07-28 | 贵州电网有限责任公司 | Anti-misoperation multimeter |
Non-Patent Citations (2)
| Title |
|---|
| 沈骏;雒军;陈奎然;王槐诚;: "万用表辅助语音报档装置的设计", 山东工业技术, no. 20, 15 October 2015 (2015-10-15), pages 120 * |
| 赵文革: "一种保护万用表的电路", 贵州教育学院学报, no. 02, 28 April 2005 (2005-04-28), pages 36 - 37 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557722A (en) * | 2020-12-07 | 2021-03-26 | 中国南方电网有限责任公司超高压输电公司梧州局 | Universal oscillograph |
| CN114113770A (en) * | 2021-12-03 | 2022-03-01 | 中国南方电网有限责任公司超高压输电公司广州局 | Voltage detection device and detection method |
| CN117233515A (en) * | 2023-11-13 | 2023-12-15 | 广东电网有限责任公司佛山供电局 | Method and system for measuring state of outlet pressing plate |
| CN117233515B (en) * | 2023-11-13 | 2024-02-13 | 广东电网有限责任公司佛山供电局 | Method and system for measuring state of outlet pressing plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110568241A (en) | anti-misoperation multimeter and use method thereof | |
| CN211122998U (en) | Anti-misoperation multimeter | |
| CN111025006B (en) | Non-contact voltage detection and phase recognition device | |
| CN110208590A (en) | A kind of voice prompting protection circuit preventing maloperation damage digital multimeter | |
| CN112067919B (en) | Automatic cable type identification device and automatic test method | |
| CN210894557U (en) | Transformer substation cable core checking and measuring instrument | |
| CN214703944U (en) | Voltage sampling detection device | |
| CN112230106B (en) | Detection device and method for switch external local switching-on/off controller | |
| CN110058072A (en) | A kind of electroscope with contact detection | |
| CN211014515U (en) | Cable core alignment detection device | |
| CN211086422U (en) | Voice prompt protection circuit for preventing digital multimeter from being damaged by misoperation | |
| CN105866703A (en) | Simulation automobile starting intelligent tester device and testing method | |
| CN208076557U (en) | A kind of multi-functional automobile-used test pen | |
| CN220381221U (en) | Explosion-proof equipment with resistance tester | |
| CN102628895B (en) | Battery detection method, battery and electronic equipment | |
| CN218546979U (en) | Alignment tool for secondary circuit | |
| CN215599317U (en) | Synchronous integrated checking device for generator set | |
| CN213633621U (en) | Electric power detects with safe type ground resistance tester that has range finding function | |
| CN216869884U (en) | Auxiliary device for calibrating electric contact pressure gauge | |
| CN217931791U (en) | Motor train unit train line testing device | |
| CN214895730U (en) | Low-voltage grounding detection device for motor train unit | |
| CN217332715U (en) | Secondary circuit fault diagnostic instrument | |
| CN212321787U (en) | Auxiliary tester for protection combined-tripping loop | |
| CN219730247U (en) | Integrated escalator synchronous rate detector | |
| CN219574242U (en) | Wire harness inspection tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |