four-point probeFunction Overview Overview:

1. It can test a resistance of 1u Ω square

2. Constant current output

3. LCD display

4. Automatic data measurement

5. Dual electric combination testing method

6. Provide Chinese or English language versions

7. Running PC software

Scope of application: Widely used:

1. Cover film; Conductive polymer film, high and low temperature electric heating film; Thermal insulation, conductive window film, conductive (shielding) cloth, decorative film, decorative paper; Metallized labels, alloy foil films; Melting, sintering, sputtering, coating, coating layers, resistive and capacitive touch screen films; Resistance testing of electrode coatings, other semiconductor materials, and thin film materials

2. Silicon block, chip resistivity and diffusion layer, epitaxial layer, ITO conductive foil film, conductive rubber and other materials, block resistance semiconductor materials/wafers, solar cells, electronic components, conductive thin films (ITO conductive film glass, etc.), metal films, conductive paint films, evaporated aluminum films, PCB copper foil films, etc,

3. Thin layer resistance and resistivity of EMI coatings and other substances, conductive paints, conductive pastes, conductive plastics, conductive rubber, conductive films, metal films, etc,

4. Anti static materials, EMI protective materials, conductive fibers, conductive ceramics, etc

Application Description:

New conductive materials, aluminum foil, copper foil, and other materials with similar properties that require measurement using the four probe method

Parameter requirements:

Specification and model	FT-361A	FT-361B
1. Range of block resistance	10-6～2×102Ω/□	10-6～2×105Ω/□
2. Range of resistivity	10-7～2×103Ω-cm	10-7～2×106Ω-cm
3. Test current range	1A, 100mA, 10mA, 1mA, 100uA, 10uA, 1uA, 0.1uA
4. Current accuracy	±0.1%
5. Resistance accuracy	≤0.3%
6. Display reading	LCD display: resistance, resistivity, square resistance, temperature, unit conversion, temperature coefficient, current, voltage, probe shape, probe spacing, thickness
Conductivity	7. Testing method
Combination dual electric testing method	8. Working power supply
Input: AC 220V ± 10%. 50Hz power consumption:< 30W	9. Errors
≤ 4% (standard sample result)	10. Choose to buy function
Choose 1. PC software; Choose 2. Square probe; Choose 3. Linear probe; Purchase 4. Testing Platform; 5. Standard resistance	11. Test probe

Probe spacing selection: 2mm； Two specifications of 3mm; Probe material selection: tungsten carbide needle, gold-plated phosphor copper hemispherical needle

Working principle and calculation formula

The calculation and testing principle of the square resistance of thin layer samples using the dual electric measurement four probe method are as follows:

The layout of the linear four probe test is shown in Figure 8, with adjacent needle distances of S1 S2、S3, According to the principles of physics and electricity:

When the current passes through probes 1 and 4, and probes 2 and 3 test the voltage, the calculation is as follows:

Working principle diagram of four probe tester

Whole machine schematic diagram - display interface

PC software interface diagram

Steps and processes

1. Turn on the power and preheat for 5 minutes

2. Assemble the probe and testing platform

3. Set the required parameters

4. Measure the sample

5. Export data

Description:

1. Automatic range

2. Accurate stability

3. Dual electric combination testing method

4. Standard resistance calibration instrument

5. Running PC software

6. Simultaneously display resistance, resistivity, and conductivity data

7. Can display 5 digits

8. Chinese and English interface

Partial customer cases

Jiangxi Aerospace Information Co., Ltd

Beijing Optoelectronic Huilong Technology Co., Ltd

Ningbo Enmai Intelligent Technology Co., Ltd

Jinan Zhanxiong Electronics Co., Ltd

Qingdao Qidong Electronic Equipment Co., Ltd

Fujian Wanlong Diamond Tools Co., Ltd

Hangzhou Jingxin Coating Packaging Co., Ltd

Dandong Haihao Electronic Technology Co., Ltd

Hangzhou Jingxin Coating Packaging Co., Ltd

South China University of Technology

Far East Foster New Energy Co., Ltd

South University of Science and Technology of China

Fujian Quanzhou Wanlong Industrial Co., Ltd

Suzhou Huanming Electronic Technology Co., Ltd

Shijiazhuang Ordnance Institute

Tianjin Yihengda Technology Co., Ltd

Sample of Factory Inspection Report

Service Items

1. Warranty: 12 months, long-term maintenance

2. Training: Operation training:

Telephone teaching; USB teaching files; Remote visual communication; On site teaching; Instruction manual and teaching documents

3. Maintenance and upkeep:

Provide knowledge maintenance and maintenance documents, labels, forms, and maintenance reminders

4. Verification file:

3Q verification documents, measurement certificates

5. Extended services:

Extended warranty service, sample testing service, extended service, instrument rental service

Plan:

Resolve the status of various materials

--Solid state, liquid state, gas state, granular resistance, resistivity, conductivity measurement

-------Focusing on new material measurement and analysis instrument solutions

----Solution materials:

Electrical performance analysis of conductors, semiconductors, insulation materials at room temperature and high temperature environments

----We have been doing:

Research and development, production, sales. Research and development, production, sales, leasing, laboratory sample analysis, and extension services

Service

FT-361 series low resistance dual electric four probe tester video file link: