CN203551662U

CN203551662U - Resistor tester

Info

Publication number: CN203551662U
Application number: CN201320612823.0U
Authority: CN
Inventors: 蔡玉兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-04
Filing date: 2013-10-04
Publication date: 2014-04-16
Anticipated expiration: 2023-10-04

Abstract

The utility model discloses a resistor tester comprising a housing (1), a display (2), an operation panel (3) and a power switch (6); a fan (9) is arranged in the housing; an inner testing port (11) is arranged right opposite to the fan (9); two sides of the inner testing port (11) are provided with a pair of clamping tools (10); a fan switch (4) and a wind speed regulation switch (5) are arranged on the housing (1). The beneficial effects are that the tester can carry out precise measurement of the resistance of material like thermistors (NTC, PTC) under normal temperature, so the resistance value of the thermistor, disengaging from rigid environment temperature requirements, can be accurately measured; a production manufacturer needs no mass investment for testing the resistance under a constant temperature environment, thereby saving mass investment for thermistor production manufacturers.

Description

A kind of resistance meter

Technical field

The utility model relates to electric power checkout equipment field, is specifically related to a kind of resistance meter.

Background technology

Current thermistor is that to take the metal oxides such as manganese, cobalt, nickel and copper be main material, adopts ceramic process manufacture to form.These metal oxide materials are all to have semiconductor property because on electrically conducting manner the semiconductor material such as all fours silicon.When temperature is low, the charge carrier of these oxide materials (electronics and hole) number is few, so its resistance value is higher; Rising along with temperature, charge carrier number increases, so resistance value reduces, thermal resistor variation range is at room temperature at 10 Ω ~ 1000000 Ω, temperature coefficient-2% ~-6.5%, at present thermistor is widely used in temperature survey and control, temperature compensation, the inhibition of breakthrough electric current, environment measuring etc.In recent years, the manufacturer of the thermistor that I cross has all obtained new progress at aspects such as the kind of thermistor and production scales, isostatic pressing process technology, thick-film technique technology, arriving in thermistor element production application improved and promoted, and the last process of production, relates to the test of thermistor, and variation of ambient temperature is larger on the impact of thermistor resistance, with universal resistance meter, be difficult to the thermistor under environment temperature to carry out correct test.

Utility model content

Goal of the invention of the present utility model is: for the problem of above-mentioned existence, provide a kind of simple in structure, durable, cost is low, the resistance meter of energy-saving safe.

The technical solution adopted in the utility model is such: comprise shell 1, display screen 2, guidance panel 3 and power switch 6, one fan 9 is installed in its housing, the right opposite of fan 9 is provided with a close beta mouth 11, and the both sides of close beta mouth 11 are provided with a pair of fixture 10; On shell 1, be also provided with fan swicth 4 and wind speed by-pass cock 5.

Further, shell (1) is provided with one group of external test port 1 and external test port 28.

In sum, owing to having adopted technique scheme, the beneficial effects of the utility model are: this instrument has solved effectively at normal temperatures to thermistor (NTC, PTC) etc. the resistance of material is accurately measured, and has realized thermistor and has required its resistance accurately to measure departing from harsh environment temperature.Solved manufacturer and spent a large amount of financial resources and realize isoperibol resistance is tested, for thermistor manufacturer has saved a large amount of investments.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Fig. 1 is front elevation of the present utility model;

Fig. 2 is top cross-sectional view of the present utility model.

Mark in figure: 1-shell, 2-display screen, 3-guidance panel, 4-fan swicth, 5-wind speed by-pass cock, 6-power switch, the external test port one of 7-, the external test port two of 8-, 9-fan, 10-fixture, 11-close beta mouth.

Embodiment

By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model is only described in a schematic way, so it only show the formation relevant with the utility model.

As shown in Figure 1, a kind of resistance meter, comprises shell 1, display screen 2, guidance panel 3 and power switch 6, and a fan 9 is installed in its housing, and the right opposite of fan 9 is provided with a close beta mouth 11, and the both sides of close beta mouth 11 are provided with a pair of fixture 10; On shell 1, be also provided with fan swicth 4 and wind speed by-pass cock 5.

Further, shell 1 is provided with one group of external test port 1 and external test port 28.

For measuring at normal temperatures thermistor or measuring warm floating compared with large resistance and design, the method is that the value at normal temperatures of resistance that reference edge is accessed to same material is made comparisons and draws the temperature varying coefficient under Current Temperatures with the value under set point of temperature, the consistance changing according to same device temperature, utilizes its temperature varying coefficient to draw the equivalent resistance of measured resistance under set point of temperature.

Each resistance first test lead being accessed is measured and measurement result and this resistance is calculated and obtained corresponding resistance value under set point of temperature at the temperature varying coefficient under Current Temperatures, and this resistance is shown and sorting.If set sample interval number of times (to just the measuring resistance of reference edge being measured once after test lead resistance test how many times) to after the measuring resistance that reference edge is accessed is measured, and calculate the temperature varying coefficient of measuring resistance under Current Temperatures with setting the corresponding resistance of measuring resistance under set point of temperature, then demonstrate the actual resistance of measuring resistance under Current Temperatures.

When excess Temperature, open fan swicth 4, regulate wind speed, temperature is maintained within a certain range, thermistor is tested.

The above-mentioned foundation desirable embodiment of the present utility model of take is enlightenment, and by above-mentioned description, relevant staff can, within not departing from the scope of this utility model technological thought, carry out various change and modification completely.The technical scope of this utility model is not limited to the content on instructions, must determine its technical scope according to claim scope.

Claims

1. a resistance meter, comprise shell (1), display screen (2), guidance panel (3) and power switch (6), it is characterized in that, one fan (9) is installed in shell, the right opposite of fan (9) is provided with a close beta mouth (11), and the both sides of close beta mouth (11) are provided with a pair of fixture (10); On shell (1), be also provided with fan swicth (4) and wind speed by-pass cock (5).

2. a kind of resistance meter according to claim 1, is characterized in that, shell (1) is provided with one group of external test port one (7) and external test port two (8).