CN202066890U - Convenient multimeter - Google Patents
Convenient multimeter Download PDFInfo
- Publication number
- CN202066890U CN202066890U CN2010205055741U CN201020505574U CN202066890U CN 202066890 U CN202066890 U CN 202066890U CN 2010205055741 U CN2010205055741 U CN 2010205055741U CN 201020505574 U CN201020505574 U CN 201020505574U CN 202066890 U CN202066890 U CN 202066890U
- Authority
- CN
- China
- Prior art keywords
- resistance
- diode
- connector lug
- throw switch
- pole double
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model relates to a convenient multimeter, which comprises a voltage coil, a resistance coil, a single-pole double-throw switch, a resistor diode, a negative connector lug, a load connector lug, a positive connector lug, a first diode, an inner power supply, a large resistor, a shell, a panel and a point gear, wherein the positive connector lug is connected with the negative connector lug after being connected with the positive pole of the first diode in series; two circuits are lead out between the first diode and the load connector lug; one circuit is connected with the single-pole double-throw switch after being connected with the large resistor and the voltage coil in series, the other circuit is connected with the resistance coil after being connected with the positive pole of the inner power supply in series, then is connected with the negative pole of the resistor diode and finally is connected with the single-pole double-throw switch; the single-pole side of the single-pole double-throw switch is connected with the negative connector lug; the voltage coil and the resistance coil are reeled on a same iron core of the point gear; and the panel comprises two scales that are a voltage scale and a resistance scale. The utility model has the advantages that the current, the load resistance and the terminal voltage in a measured circuit can be obtained at one step only by connecting the multimeter and the circuits for one time.
Description
Affiliated technical field
The utility model relates to a kind of dynamometer instrument, especially a kind of portable multimeter.
Background technology
In the measurement of DC circuit, we often need the electric current in the metering circuit, the resistance of load and the voltage at load two ends, the most full ammeter of function is a multimeter at present, can directly record each above-mentioned physical quantity by it, but traditional multimeter is when measuring above-mentioned each physical quantity, not only need to regulate and respectively measure gear, but also will change the access way of multimeter, this makes measuring process extremely bother.
Summary of the invention
At the problems referred to above, the purpose of this utility model is to provide a kind of portable multimeter, and this multimeter only needs place in circuit once, can above-mentioned all physical quantitys of disposable acquisition.
The technical scheme that its technical matters that solves the utility model adopts is: this portable multimeter comprises potential winding, resistance coil, single-pole double-throw switch (SPDT), the resistance diode, negative connector lug, the load wiring head, positive connector lug, first diode, interior power supply, big resistance, shell, panel, point gear, described positive connector lug connects described load wiring head after being connected in series described first diode anode again, draw two-way between described first diode cathode and the described load wiring head, the one tunnel is connected in series described big resistance, insert described single-pole double-throw switch (SPDT) behind the potential winding, another road connects described resistance coil after connecing described interior positive source again, and then connect described resistance diode cathode, insert described single-pole double-throw switch (SPDT) again, the described negative connector lug of the hilted broadsword side joint of described single-pole double-throw switch (SPDT), described potential winding and resistance coil are on the same iron core of described point gear, described panel has the twice scale, is respectively voltage calibration and resistance scale.
Above-mentioned portable multimeter, in use, make positive connector lug connect the circuit-under-test positive pole, negative connector lug connects the circuit-under-test negative pole, load is connected between load wiring head and the negative connector lug, then when single-pole double-throw switch (SPDT) is beaten on the circuit of interior power supply place, because the unilateral constrain effect of first diode and resistance diode, multimeter can be measured interior power supply, load, resistance diode place current in loop, and convert out pull-up resistor, this resistance value can directly be read by the scale on the panel, when single-pole double-throw switch (SPDT) was beaten on the circuit of big resistance place, circuit was equal to the common voltage watch circuit in the multimeter, can measure the load both end voltage, this voltage can directly be read by the panel scale, the original electric current in the load then by the merchant of survey voltage and institute's measuring resistance.
To sum up can get, the advantage of this portable multimeter only is to need place in circuit once, the electric current in can disposable acquisition circuit-under-test and the resistance and the terminal voltage of load.
Description of drawings
Accompanying drawing 1 is the working circuit diagram of this portable multimeter.
Among the figure: 1, potential winding; 2, resistance coil; 3, single-pole double-throw switch (SPDT); 4, the resistance diode; 5, negative connector lug; 6, external power; 7, load; 8, the load wiring head; 9, positive connector lug; 10, the first diodes; 11, interior power supply; 12, big resistance.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified:
In the accompanying drawing illustrated embodiment, this portable multimeter comprises potential winding 1, resistance coil 2, single-pole double-throw switch (SPDT) 3, resistance diode 4, negative connector lug 5, load wiring 8, positive connector lug 9, first diode 10, interior power supply 11, big resistance 12, shell, panel, point gear connects described load wiring 8 again behind described first diode, 9 anodes of described positive connector lug 9 serial connections, draw two-way between described first diode, 10 negative electrodes and the described load wiring 8, one the tunnel is connected in series described big resistance 12, described single-pole double-throw switch (SPDT) 3 is inserted in potential winding 1 back, another road connects described resistance coil 2 after connecing described interior power supply 11 positive poles again, and then connects described resistance diode 4 negative electrodes, inserts described single-pole double-throw switch (SPDT) 3 again, the described negative connector lug 8 of the hilted broadsword side joint of described single-pole double-throw switch (SPDT) 3, described potential winding 1 and resistance coil 2 are on the same iron core of described point gear, and described panel has the twice scale, are respectively voltage calibration and resistance scale.
Above-mentioned portable multimeter, described interior power supply 11 are the dry cell of two joint 1.5V.
Above-mentioned portable multimeter, the resistance of described big resistance 12 is between 1K Ω-20K Ω.
Above-mentioned portable multimeter, in use, make positive connector lug 9 connect the circuit-under-test positive pole, negative connector lug 5 connects the circuit-under-test negative pole, load 7 is connected between load wiring 8 and the negative connector lug 5, then when 3 dozens of single-pole double-throw switch (SPDT)s are on interior power supply 11 place circuit, because the unilateral constrain effect of first diode 10 and resistance diode 4, external power 6 can only be along first diode 10, load 7, external power 6 effects, interior power supply 11 can only be along load 7, resistance diode 4, interior power supply 11 effects, multimeter can be measured interior power supply 11, load 7, resistance diode 4 place current in loop, and convert out load 7 resistance, this resistance value can directly be read by the scale on the panel, when 3 dozens of single-pole double-throw switch (SPDT)s were on big resistance 12 place circuit, circuit was equal to the common voltage watch circuit in the multimeter, can measure load 7 both end voltage, this voltage can directly be read by the panel scale, the original electric current in the load 7 then by the merchant of survey voltage and institute's measuring resistance.
Claims (1)
1. portable multimeter, comprise potential winding (1), resistance coil (2), single-pole double-throw switch (SPDT) (3), resistance diode (4), negative connector lug (5), load wiring head (8), positive connector lug (9), first diode (10), interior power supply (11), big resistance (12), shell, panel, point gear, it is characterized in that: connect described load wiring head (8) again behind described positive connector lug (9) serial connection described first diode (9) anode, draw two-way between described first diode (10) negative electrode and the described load wiring head (8), one the tunnel is connected in series described big resistance (12), described single-pole double-throw switch (SPDT) (3) is inserted in potential winding (1) back, another road connects described resistance coil (2) after connecing described interior power supply (11) positive pole again, and then connects described resistance diode (4) negative electrode, inserts described single-pole double-throw switch (SPDT) (3) again, the described negative connector lug of the hilted broadsword side joint of described single-pole double-throw switch (SPDT) (3) (8), described potential winding (1) and resistance coil (2) are on the same iron core of described point gear, and described panel has the twice scale, are respectively voltage calibration and resistance scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205055741U CN202066890U (en) | 2010-08-26 | 2010-08-26 | Convenient multimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205055741U CN202066890U (en) | 2010-08-26 | 2010-08-26 | Convenient multimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202066890U true CN202066890U (en) | 2011-12-07 |
Family
ID=45060750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205055741U Expired - Fee Related CN202066890U (en) | 2010-08-26 | 2010-08-26 | Convenient multimeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202066890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407185A (en) * | 2014-12-08 | 2015-03-11 | 赵伊苓 | Electric oscillating wave generator |
-
2010
- 2010-08-26 CN CN2010205055741U patent/CN202066890U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407185A (en) * | 2014-12-08 | 2015-03-11 | 赵伊苓 | Electric oscillating wave generator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102944847B (en) | Battery electricity detection method and system | |
| CN102590609B (en) | The method of mobile terminal and measurement mobile terminal power consumption | |
| CN104734228A (en) | Solar panel measuring circuit of solar charge controller of common positive pole structure | |
| CN106786864A (en) | A kind of charger that can test battery parameter | |
| CN202066890U (en) | Convenient multimeter | |
| CN208443870U (en) | A kind of electric energy meter testing jig | |
| CN209117742U (en) | A kind of direct-current charging post high accuracy number metering device | |
| CN202393834U (en) | Precise ohmic internal resistance measurer for battery | |
| CN201156335Y (en) | Teaching demonstration apparatus for resistance measurement by volt-ampere method | |
| CN203396799U (en) | Multimeter electricity test pen adapter | |
| CN202256500U (en) | Pen-shaped digital ohm single-purpose gauge | |
| CN106771487A (en) | The method of measuring instrument, the method for measurement electric current and measurement mobile phone charging current | |
| CN202854215U (en) | Inductive test pencil based on six-inverter integrated circuit | |
| CN206281894U (en) | Measuring instrument | |
| CN203645371U (en) | Cell panel measuring circuit of solar charge controller with common-anode structure | |
| CN205068076U (en) | Battery data acquisition device | |
| CN212410673U (en) | Digital multimeter control circuit based on RC time delay | |
| CN202904971U (en) | Teaching demonstration apparatus for resistance measurement by using voltmeter-ammeter method | |
| CN202994886U (en) | Hall current measurement tool device | |
| CN214845495U (en) | Grounding resistance on-line detector | |
| CN204203435U (en) | A kind of mobile terminal with electrical measurement function | |
| CN103852624A (en) | Hand-held convertor transformer core grounding current tester | |
| CN210626556U (en) | High-precision CT transformation ratio measuring instrument with wide range | |
| CN216979160U (en) | Chargeable formula digital multimeter | |
| CN220399532U (en) | Low-power consumption test fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20120826 |