CN207798915U - Digital multimeter with simulation instruction function - Google Patents
Digital multimeter with simulation instruction function Download PDFInfo
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- CN207798915U CN207798915U CN201721229081.8U CN201721229081U CN207798915U CN 207798915 U CN207798915 U CN 207798915U CN 201721229081 U CN201721229081 U CN 201721229081U CN 207798915 U CN207798915 U CN 207798915U
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Abstract
The utility model discloses a kind of digital multimeter of band simulation instruction function, the digital multimeter includes shell, circuit board, control chip, non-contact voltage exploring antenna, and simulation indicator lamp groups, the control chip is set on the circuit board and is conductively connected with the simulation indicator lamp groups, the non-contact voltage exploring antenna is connect with the circuit board conductive, the shell corresponds to the simulation indicator lamp groups and is provided with simulation indicating window, the simulation indicator lamp groups include at least two indicator lights, the control chip is when carrying out non-contact voltage detection, when switching to the test of zero firewire, when switching on off test, when switching to contact voltage tester and/or when switching to testing current, the indicator light of the bright respective numbers in control point carries out simulation instruction to be tied to measurement.The utility model can carry out simulation instruction in corresponding measure by simulating indicator lamp groups to measurement result, and with quicklook response measurement is as a result, to avoid the generation of safety accident.
Description
Technical field
The utility model is related to electrical detection technique field, more particularly to a kind of digital versatile of band simulation instruction function
Table.
Background technology
Currently, the measurement of electric measurement is increasingly valued by the people safely.Currently, the U.S. averagely has 9,000 daily
Worker is caused injury residual in electric measurement work, and it is all since worker is to electric measurement work to occur for 80% or more the reason of accident
Caused by the maloperation of tool.In the prior art, multimeter is usually obtained typically only by the numerical value read on display screen
The size of tested current or voltage can not intuitively reflect and survey current or voltage with the presence or absence of danger, non-electrician specialty people
Scholar using when be easy to happen safety accident.
Utility model content
The main purpose of the utility model is to provide the digital multimeter that a kind of band simulates instruction function, it is intended to improve number
Word multimeter measures safety when using.
To achieve the goals above, the utility model provides a kind of digital multimeter of band simulation instruction function, the number
Word multimeter includes shell, circuit board, control chip, non-contact voltage exploring antenna and simulation indicator lamp groups, the circuit
Plate, control chip and simulation indicator lamp groups are arranged in the shell, the control chip on the circuit board and with
The simulation indicator lamp groups are conductively connected, and the non-contact voltage exploring antenna is connect with the circuit board conductive, the shell
The corresponding simulation indicator lamp groups are provided with simulation indicating window, and the simulation indicator lamp groups include at least two indicator lights, described
Control chip is used to control the combination of one kind or at least two in the following instruction that shines of the simulation indicator lamp groups progress, shines
Instruction includes：
The control chip for strong and weak according to the voltage detected when carrying out non-contact voltage detection, light by control
The indicator light of respective numbers is strong and weak to simulate instructed voltage；
The control chip is used for when switching to the test of zero firewire, and the indicator light of the bright respective numbers in control point refers to simulate
Show that measured conductor is zero curve or firewire；
The control chip is used for when switching on off test, and the indicator light of the bright respective numbers in control point indicates to simulate
Measured conductor is unicom or non-unicom；
The control chip is used for when switching to contact voltage tester, when the value of tested voltage is more than preset safety
Control lights the indicator light of respective numbers and is tested voltage to simulate instruction as dangerous voltage when voltage；
The control chip is used for when switching to testing current, when the value of tested electric current is more than preset safe current
The indicator light of the bright respective numbers in control point is dangerous currents to simulate instruction to be tested electric current.
Preferably, the luminescent color of at least two indicator lights when lighting is identical or differs.
Preferably, further include buzzer, the buzzer is connect with the control chip conductive, and the control chip is also used
One kind in following alarm is sent out in control buzzer or at least two combination, the alarm include：
When non-contact voltage is detected according to the voltage power that is detected control the buzzer send out corresponding frequencies and
The alarm song of size carrys out instructed voltage power；
The buzzer is controlled when zero firewire is tested sends out the alarm song of corresponding frequencies and size to indicate measured conductor
For zero curve or firewire；
The buzzer is controlled on off test send out the alarm song of corresponding frequencies and size be to indicate measured conductor
Unicom or non-unicom；
In contact voltage tester, the buzzer hair is controlled when the value of tested voltage is more than preset safe voltage
Go out the alarm song of corresponding frequencies and size to indicate that tested voltage is dangerous voltage；
In testing current, when the value of tested electric current is more than preset safe current controlling the buzzer sends out accordingly
The alarm song of frequency and size indicates that tested voltage is dangerous currents.
Preferably, the indicator light is in transversely arranged.
Preferably, the digital multimeter further includes light-strip, and the light-strip corresponds to each indicator light and is formed with two
A light-guiding pillar, the simulation indicating window corresponds to the formation of each light-guiding pillar, and there are one light-emitting windows.
Preferably, the quantity of the indicator light is three, and three indicator lights are by sequence point from left to right or from right to left
Other first indicator light, the second indicator light and third indicator light incude ac induction voltage by non-contact voltage exploring antenna, when
When the first predeterminated voltage ＜ induced voltages≤second predeterminated voltage, the control chip controls light the first indicator light；When second
When predeterminated voltage ＜ induced voltages≤third predeterminated voltage, the control chip controls light the first indicator light and the second instruction
Lamp；Work as induced voltage>When third predeterminated voltage, the control chip controls light the first indicator light, the second indicator light and third
Indicator light.
Preferably, first indicator light, the color of the second indicator light and third indicator light when lighting be respectively green,
Green and yellow, or be respectively green, yellow and red, or respectively yellow, yellow and red.
Preferably, three indicator lights distinguish the first indicator light, the second finger by sequence from left to right or from right to left
Show lamp and third indicator light, when carrying out on off test, when measuring resistance and being less than 30 ohm, the control chip controls light the
One indicator light and the second indicator light；When measuring resistance at 40~60 ohm, the control chip controls light third indicator light；
When measuring resistance more than 60 ohm, the control chip controls extinguish the first indicator light, the second indicator light and third indicator light.
Preferably, the control chip is DTM0660, and three indicator lights pass through the pin of DTM0660 respectively
PT1.4, pin PT1.2 and pin PT3.7 carry out lighting control.
Preferably, the shell includes face-piece and bottom case, and the face-piece is equipped with display screen, button, knob and multiple defeated
Enter socket, the display screen, button, knob and multiple input socket are arranged in order to the back-end by the front end of shell, the simulation
Indicating window is set to the front end on the face-piece and positioned at the display screen.
The digital multimeter of the band simulation instruction function of the utility model, can accordingly measured by simulating indicator lamp groups
When simulation instruction is carried out to measurement result, with quicklook response measurement is as a result, to avoid the generation of safety accident.
Description of the drawings
Fig. 1 is the three-dimensional assembly diagram of one embodiment of digital multimeter of the utility model band simulation instruction function.
Fig. 2 is the rear view of the digital multimeter with simulation instruction function shown in Fig. 1.
Fig. 3 is the explosive view of the digital multimeter with simulation instruction function shown in Fig. 1.
Fig. 4 is the further explosion of face-piece and its mounting assembly in the digital multimeter for indicated with simulation shown in Fig. 3 function
Figure.
Fig. 5 is the further explosion of bottom case and its mounting assembly in the digital multimeter for indicated with simulation shown in Fig. 3 function
Figure.
Fig. 6 is the explosive view of the digital multimeter with simulation instruction function shown in Fig. 5.
Fig. 7 is the further explosion of face-piece and its mounting assembly in the digital multimeter for indicated with simulation shown in Fig. 6 function
Figure.
Fig. 8 is the further explosion of bottom case and its mounting assembly in the digital multimeter for indicated with simulation shown in Fig. 6 function
Figure.
Fig. 9 is the circuit control block diagram of the digital multimeter with simulation instruction function shown in Fig. 1.
Figure 10 is the physical circuit figure of one application examples of circuit control block diagram shown in Fig. 9.
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
It should be appreciated that the specific embodiments described herein are only used to explain the utility model, it is not used to limit
The utility model.
The utility model provides a kind of digital multimeter of band simulation instruction function.As shown in Figures 1 to 10, in this practicality
In a novel embodiment, the digital multimeter with simulation instruction function includes shell 1, circuit board 2, controls chip 3, non-contact
Voltage detection antenna NCV and simulation indicator lamp groups 5.The circuit board 2, control chip 3 and simulation indicator lamp groups 5 are arranged at
In the shell 1, the control chip 3 be set on the circuit board 2 and (control chip 3 be not shown in Fig. 3 and Fig. 6) and with it is described
Simulation indicator lamp groups 5 are conductively connected (referring to Fig. 9), and the non-contact voltage exploring antenna NCV is conductive even with the circuit board 2
It connects, the shell 1 corresponds to the simulation indicator lamp groups 5 and is provided with simulation indicating window 11, and the simulation indicator lamp groups 5 include at least
Two indicator lights 51, the control chip 3 are used for strong according to the voltage detected when carrying out non-contact voltage (NCV) detection
Weak, the indicator light 51 of the bright respective numbers in control point is strong and weak to simulate instructed voltage.
In the digital multimeter of the band simulation instruction function, indicator lamp groups are simulated by outfit, are shone by difference
Mode carrys out instructed voltage power, more intuitive to the prompt of dangerous voltage, in the case where being read without voltage measurements,
Whether dangerous voltage can rapidly be perceived, it is ensured that the personal safety of survey crew.
In the present embodiment, the front end of the shell 1 is equipped with skull 12, and the outer end of the skull 12 is formed with pillar 121,
The inner end of the pillar 121 is formed with opening 122, and the non-contact voltage exploring antenna NCV is stretched to by the opening 122
In the pillar 121, so that the position of non-contact voltage detection becomes apparent from, and more pacifies when carrying out non-contact voltage detection
It is complete and intuitive, when non-contact voltage detects, it can be quickly found the position of non-contact voltage exploring antenna NCV, rather than
It goes to attempt with other positions so that measure accuracy higher that is safer, and measuring.In addition, the outer end of the pillar 121
Protrusion is formed with NCV induction symbols 122, in order to the position of definitely non-contact voltage exploring antenna NCV.
The luminescent color of at least two indicator lights 51 when lighting can be identical or differs.It is identical in luminescent color
When, control chip 3 is used to may be used a little according to the voltage power detected when carrying out non-contact voltage (NCV) and detecting
The indicator light 51 of bright different number is strong and weak to distinguish voltage, and voltage is stronger, then the quantity for the indicator light 51 lighted is more, and voltage is got over
Weak, then the quantity for the indicator light 51 lighted is fewer, and is less than a setting value in voltage, does not light any indicator light 51.
When luminescent color differs, it may be used and light the indicator light 51 of different colours to distinguish voltage power, such as green indicator light
Indicate that voltage strength is general, red indicating light indicates that voltage is stronger, it should be noted that personal safety.It is lighted alternatively, it is also possible to use
It is weaker that the quantity mode combined with color is lighted carrys out instructed voltage.
As a further improvement, the control chip 3 is additionally operable to when switching to the test of zero firewire, the bright respective counts in control point
The indicator light 51 of amount indicates that measured conductor is zero curve or firewire to simulate.For example, when it is firewire to detect measured conductor, it is described
Control chip 3 controls all indicator lights 51 and lights；When it is zero curve to detect measured conductor, the control of control chip 3 is extinguished
All indicator lights 51.Luminescent color it is of course also possible to use other lighting modes, such as when indicator light 51 is lighted not phase
With in the case of, using the indicator light 51 for lighting different colours indicate instruction measured conductor for zero curve or firewire, for example, by using
It is zero curve to light green indicator light instruction measured conductor, uses and lights red indicating light instruction measured conductor as firewire.
In the present embodiment, when it is firewire to detect measured conductor, the control chip 3 controls 51 points of all indicator lights
It is bright；When it is zero curve to detect measured conductor, all indicator lights 51 are extinguished in the control of control chip 3, i.e., do not light any finger
Show lamp 51.
As a further improvement, the control chip 3 is additionally operable to when switching on off test, the bright respective numbers in control point
Indicator light 51 come simulate instruction measured conductor be unicom or non-unicom.When carrying out on off test, it is less than first when measuring resistance
Preset resistive value, such as at 30 ohm, represents that break-make is good, and the first indicator light 51 and second finger is lighted in the control of control chip 3
Show lamp 51；It is the second preset resistive value when measuring resistance, such as at 40~60 ohm, representing break-make, there may be problem, the controls
Third indicator light 51 is lighted in the control of coremaking piece 3；It is more than third preset resistive value when measuring resistance, such as at 60 ohm, representative does not join
Logical, the first indicator light 51, the second indicator light 51 and third indicator light 51 are extinguished in the control of control chip 3.
As a further improvement, the control chip 3 is additionally operable to when switching to contact voltage tester, when tested voltage
Value more than preset safe voltage when control light the indicator light of respective numbers simulate instruction be tested voltage be dangerous voltage；
For example, default safe voltage is 79V, when tested voltage is more than 79V, the first indicator light 51, the second indicator light 51 and third refer to
Show that 51 all light of lamp or in which part lamp are bright, further, a default dangerous voltage, such as 110V can be set again, the default danger
Voltage is more than default safe voltage, when tested voltage is more than the default dangerous voltage, the color or number of lights of change instruction lamp
Amount carries out the more dangerous instruction of voltage for example, when tested voltage is between default safe voltage and default dangerous voltage, lights
One indicator light, or it is yellow to light whole indicator lights and indicator light colors, when tested voltage is more than default dangerous voltage,
Whole indicator lights are then lighted, or it is red to light whole indicator lights and indicator light colors.It these are only and illustrate, not office
Limit is such.
As a further improvement, the control chip 3 is additionally operable to when switching to testing current, when the value of tested electric current is super
Control lights the indicator light of respective numbers and is tested voltage to simulate instruction as dangerous currents when crossing preset safe current；For example,
Default safe current is 1A, and when tested voltage is more than 1A, the first indicator light 51, the second indicator light 51 and third indicator light 51 are complete
Bright or in which part lamp is bright, further, a default dangerous currents, such as 5A can be arranged again, which is more than pre-
If safe current, when tested electric current is more than the default dangerous currents, the color of change instruction lamp or lights quantity and carry out voltage
More dangerous instruction lights an indicator light for example, when tested electric current is between default safe current and default dangerous currents,
Or it is yellow to light whole indicator lights and indicator light colors, when tested electric current is more than default dangerous currents, then lights whole
Indicator light, or it is red to light whole indicator lights and indicator light colors.It these are only and illustrate, be not so limited.
As a further improvement, the digital multimeter with simulation instruction function further includes buzzer BUZ, the buzzer
BUZ is conductively connected with the control chip 3, and the control chip 3 is additionally operable to when non-contact voltage is detected according to being detected
Voltage power control the buzzer BUZ and send out the alarm song of corresponding frequencies and size and carry out instructed voltage power.For example, with
When voltage grows from weak to strong, the volume of the alarm of buzzer BUZ increase therewith and/or the frequency of the alarm of buzzer BUZ with
Increase.
As a further improvement, the control chip 3 is additionally operable to control the buzzer BUZ when zero firewire is tested and send out
The alarm song of corresponding frequencies and size come indicate measured conductor be zero curve or firewire.For example, when being zero curve, buzzer BUZ is sent out
Faint alarm；For firewire when, buzzer BUZ sends out the strong alarm of high-frequency.
As a further improvement, the control chip 3 is additionally operable to control the buzzer BUZ on off test and sends out phase
The alarm song of frequency and size is answered to indicate that measured conductor is unicom or non-unicom.For example, when being unicom, buzzer BUZ is sent out
Faint alarm；For not unicom when, buzzer BUZ sends out the strong alarm of high-frequency.
Alarm forms of the above-mentioned buzzer BUZ when non-contact voltage detection, on off test and zero firewire are tested can phase
Mutually it is applied in combination or is used alone.
In the present embodiment, the quantity of the indicator light 51 is three and in transversely arranged.Indicator light 51 is LED, and three
Indicator light 51 has been collectively formed in the same LED light bar.In other embodiments, three indicator lights 51 can also be separated
Single led lamp in addition, the quantity of indicator light 51 can also be two, or is more than three.
In the present embodiment, the digital multimeter of the band simulation instruction function further includes light-strip 7, the light-strip 7
Corresponding each indicator light 51 is formed there are two light-guiding pillar 71, and the simulation indicating window 11 corresponds to each light-guiding pillar 71 and is formed with
One light-emitting window 111.In this way, showing lamp 51 by three, the effect of six lamps can be realized.
Three indicator lights 51 distinguish the first indicator light 51, the second indicator light by sequence from left to right or from right to left
51 and third indicator light 51, ac induction voltage is incuded by non-contact voltage exploring antenna NCV, when the first predeterminated voltage (example
Such as 12V) ＜ induced voltages≤second predeterminated voltage (such as 50V) when, voltage is relatively low, and the control chip 3 control is lighted
First indicator light 51；As the second predeterminated voltage (such as 50V) ＜ induced voltages≤third predeterminated voltage (such as 90V), voltage
Relatively high, the first indicator light 51 and the second indicator light 51 are lighted in the control of control chip 3；Work as induced voltage>Third is default
When voltage (such as 90V), voltage is very high, and the first indicator light 51, the second indicator light 51 and the are lighted in the control chip 3 control
Three indicator lights 51, to reach strong intuitive warning function.
In the present embodiment, the face of first indicator light 51, the second indicator light 51 and third indicator light 51 when lighting
Color is respectively green, green and yellow.In other embodiments, the first indicator light 51, the second indicator light 51 and third indicator light
51 it is also an option that be other colors when lighting, it is not limited to the present embodiment.For example, the first indicator light 51, second refers to
Show that lamp 51 and third indicator light 51 are respectively green, yellow and red, or respectively yellow, yellow and red.
In the present embodiment, three indicator lights 51 distinguish the first indicator light by sequence from left to right or from right to left
51, the second indicator light 51 and third indicator light 51, when carrying out on off test, when measuring resistance less than 30 ohm, the control
The first indicator light 51 and the second indicator light 51 are lighted in the control of chip 3；When measuring resistance at 40~60 ohm, the control chip
Third indicator light 51 is lighted in 3 controls；When measuring resistance more than 60 ohm, the first indicator light is extinguished in the control of control chip 3
51, the second indicator light 51 and third indicator light 51, however, preset voltage value is not so limited when on off test.
As a further improvement, the digital multimeter with simulation instruction function further includes headlamp LS, the headlamp LS
Set on the rear side of shell 1, in use, the surrounding enviroment of detected part can easily be illuminated under dark surrounds, it is not required to
Additionally to configure flashlight, operation and its conveniently, and improve safety when use.The shell 1, which is equipped with, controls the photograph
The button H/B that bright lamp LS is opened and closed.Lampshade 82 is covered on headlamp LS.Headlamp LS uses high-power LED, has
Preferable illuminating effect.
Digital multimeter with simulation instruction function further includes the protective case 9 being set on the shell 1, the protective case
9, which correspond to the headlamp LS, is equipped with through-hole 91.
The shell 1 includes face-piece 13 and bottom case 14, and the face-piece 13 is equipped with display screen 131, button SEL, knob 133
With multiple input socket 134/135/136/137, the display screen 131, button SEL, knob 133 and multiple input socket 134/
135/136/137 is arranged in order to the back-end by the front end of shell 1, and the simulation indicating window 11 is set on the face-piece 13 and is located at
The front end of the display screen 131.
The headlamp LS is arranged close to the front end of the shell, and specifically, the headlamp LS faces screen 131 is arranged,
In this way when carrying out non-contact voltage detection, the light emitting region of headlamp LS can cover the surrounding enviroment of whole conducting wire to be measured,
So that measuring more safe.
The bottom case 14 is equipped with battery tray 141, and for placing battery 142, the outside of the bottom case is equipped with battery cover
143, the outside of the battery cover 143 is articulated with holder 144.
Figure 10 is the physical circuit figure of one application examples of circuit control block diagram shown in Fig. 9, in the application examples, controls chip 3
For DTM0660, three indicator lights are respectively to be indicated using LED1, LED2, LED3 in Figure 10, and buzzer BUZ marks, headlamp is adopted
It is indicated with LS, non-contact voltage exploring antenna is indicated using NCV, and COM, V/ Ω/Cap/DT/ is respectively adopted in four input sockets
MV/Hz/Temp, A/mA, 10A are indicated.
Three indicator lights LED1, LED2, LED3 pass through the pin PT1.4 of DTM0660, pin PT1.2 and pin respectively
PT3.7 carries out lighting control.Buzzer BUZ is by the pin PT1.7 controls of DTM0660, the pin that headlamp passes through DTM0660
PT2.2 is controlled.
The utility model is not limited to embodiment of above, under technology contents disclosed in the above embodiment, may be used also
To carry out various change.Equivalent structure transformation made by using the description of the utility model and the drawings, or directly or
Other related technical areas are used in indirectly, are equally included in the patent within the scope of the utility model.
Claims (10)
1. a kind of digital multimeter of band simulation instruction function, which is characterized in that the digital multimeter includes shell, circuit
Plate, control chip, non-contact voltage exploring antenna and simulation indicator lamp groups, the circuit board, control chip and simulation instruction
Lamp group is arranged in the shell, and the control chip is set on the circuit board and connects with the simulation indicator lamp groups conduction
It connects, the non-contact voltage exploring antenna is connect with the circuit board conductive, and the shell corresponds to the simulation indicator lamp groups and sets
It is equipped with simulation indicating window, the simulation indicator lamp groups include at least two indicator lights, and the control chip is for controlling the mould
Quasi- indicator lamp groups carry out the combination of one kind or at least two in the following instruction that shines, and luminous instruction includes：
For strong and weak according to the voltage detected when carrying out non-contact voltage detection, control point exposes answers the control chip
The indicator light of quantity is strong and weak to simulate instructed voltage；
The control chip is used for when switching to the test of zero firewire, and the indicator lights of the bright respective numbers in control point simulates instruction quilt
It is zero curve or firewire to survey conductor；
The control chip is used for when switching on off test, and the indicator light of the bright respective numbers in control point is tested to simulate instruction
Conductor is unicom or non-unicom；
The control chip is used for when switching to contact voltage tester, when the value of tested voltage is more than preset safe voltage
When control light the indicator light of respective numbers simulate instruction be tested voltage be dangerous voltage；
The control chip is used for when switching to testing current, is controlled when the value of tested electric current is more than preset safe current
It lights the indicator light of respective numbers and is tested electric current to simulate instruction as dangerous currents.
2. the digital multimeter as described in claim 1 with simulation instruction function, which is characterized in that at least two instructions
Luminescent color of the lamp when lighting is identical or differs.
3. the digital multimeter as described in claim 1 with simulation instruction function, which is characterized in that further include buzzer, institute
Buzzer is stated to connect with the control chip conductive, it is described control chip be additionally operable to control buzzer send out in following alarm one
Kind or at least two combination, the alarm includes：
The buzzer is controlled according to the voltage power detected when non-contact voltage detects and sends out corresponding frequencies and size
Alarm song come instructed voltage power；
The buzzer is controlled when zero firewire is tested sends out the alarm song of corresponding frequencies and size to indicate that measured conductor is zero
Line or firewire；
The buzzer is controlled on off test sends out the alarm song of corresponding frequencies and size to indicate that measured conductor is unicom
Or not unicom；
In contact voltage tester, when the value of tested voltage is more than preset safe voltage controlling the buzzer sends out phase
The alarm song of frequency and size is answered to indicate that tested voltage is dangerous voltage；
In testing current, when the value of tested electric current is more than preset safe current controlling the buzzer sends out corresponding frequencies
Indicate that tested voltage is dangerous currents with the alarm song of size.
4. the digital multimeter as described in claim 1 with simulation instruction function, which is characterized in that the indicator light is in laterally
Arrangement.
5. the digital multimeter as claimed in claim 4 with simulation instruction function, which is characterized in that the digital multimeter is also
Including light-strip, the light-strip corresponds to the light-guiding pillar that each indicator light forms respective numbers, and the simulation indicating window corresponds to
There are one light-emitting windows for the formation of each light-guiding pillar.
6. the digital multimeter of the band simulation instruction function as described in any one of claim 1 to 5, which is characterized in that institute
The quantity for stating indicator light is three, and three indicator lights distinguish the first indicator light, second by sequence from left to right or from right to left
Indicator light and third indicator light incude ac induction voltage by non-contact voltage exploring antenna, when the first predeterminated voltage ＜ senses
When answering voltage≤second predeterminated voltage, the control chip controls light the first indicator light；When the second predeterminated voltage ＜ induced electricities
When pressure≤third predeterminated voltage, the control chip controls light the first indicator light and the second indicator light；Work as induced voltage>Third
When predeterminated voltage, the control chip controls light the first indicator light, the second indicator light and third indicator light.
7. the digital multimeter as claimed in claim 6 with simulation instruction function, which is characterized in that first indicator light,
The color of second indicator light and third indicator light when lighting is respectively green, green and yellow, or is respectively green, yellow
And red, or respectively yellow, yellow and red.
8. the digital multimeter of the band simulation instruction function as described in any one of claim 1 to 5, which is characterized in that institute
The quantity for stating indicator light is three, and three indicator lights distinguish the first indicator light, second by sequence from left to right or from right to left
Indicator light and third indicator light, when carrying out on off test, when measuring resistance less than 30 ohm, the control chip controls are lighted
First indicator light and the second indicator light；When measuring resistance at 40~60 ohm, the control chip controls light third instruction
Lamp；When measuring resistance more than 60 ohm, the control chip controls extinguish the first indicator light, the second indicator light and third instruction
Lamp.
9. band simulation as claimed in claim 6 indicates the digital multimeter of function, which is characterized in that the control chip is
DTM0660, three indicator lights are lighted by the pin PT1.4 of DTM0660, pin PT1.2 and pin PT3.7 respectively
Control.
10. the digital multimeter as described in claim 1 with simulation instruction function, which is characterized in that the shell includes face
Shell and bottom case, the face-piece be equipped with display screen, button, knob and multiple input socket, the display screen, button, knob and
Multiple input socket is arranged in order to the back-end by the front end of shell, and the simulation indicating window is set on the face-piece and positioned at described
The front end of display screen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017208951589 | 2017-07-21 | ||
| CN201720895158 | 2017-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207798915U true CN207798915U (en) | 2018-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721229081.8U Active CN207798915U (en) | 2017-07-21 | 2017-09-22 | Digital multimeter with simulation instruction function |
| CN201721232499.4U Active CN207557327U (en) | 2017-07-21 | 2017-09-22 | Digital multimeter with NVC functions |
| CN201721227275.4U Active CN207798914U (en) | 2017-07-21 | 2017-09-22 | Multi-functional digital multimeter |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721232499.4U Active CN207557327U (en) | 2017-07-21 | 2017-09-22 | Digital multimeter with NVC functions |
| CN201721227275.4U Active CN207798914U (en) | 2017-07-21 | 2017-09-22 | Multi-functional digital multimeter |
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| Country | Link |
|---|---|
| CN (3) | CN207798915U (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI683109B (en) * | 2018-11-16 | 2020-01-21 | 瑞星科技股份有限公司 | Measuring rod for electric meter and electric meter assembly using the same |
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2017
- 2017-09-22 CN CN201721229081.8U patent/CN207798915U/en active Active
- 2017-09-22 CN CN201721232499.4U patent/CN207557327U/en active Active
- 2017-09-22 CN CN201721227275.4U patent/CN207798914U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN207798914U (en) | 2018-08-31 |
| CN207557327U (en) | 2018-06-29 |
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Effective date of registration: 20190419 Address after: 541105 Yangtang Industrial Park, Lingui Town, Lingui District, Guilin City, Guangxi Zhuang Autonomous Region Patentee after: Guilin Huayi Intelligent Measurement Technology Co., Ltd. Address before: 518110 3rd floor, 2nd building, 306 Guiyue Road, Guanlan Beitou Community, Longhua New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Hua measurement Yizhi Polytron Technologies Inc |
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