1、 Structural features

2、 Overview
2.1 Basic functions
The ST2742B automatic powder resistivity tester is a measuring instrument that uses the four probe method to test the "resistivity pressure" characteristics of powders.
2.2 Adopting Major National Standards
GBT 1552-1995 Direct row four probe method for measuring the resistivity of silicon and germanium single crystals, GBT 30835-2014 Carbon composite lithium iron phosphate cathode material for lithium-ion batteries, and
GBT 24521-2009 Method for Determining the Resistivity of Coke
2.2 Complete set of instruments:
The main components of the entire instrument include: measurement and control host, automatic pressure control console, automatic height sensor, feeder, four probe electrode, and supporting PC measurement and control software modules.
2.3 Advantages and characteristics:
a. High precision national standard four probe algorithm.
Overcoming errors in contact resistance and testing electrode line resistance using the two electrode method.
The national standard four probe method is used to test powder resistivity, overcoming the drawbacks of traditional two electrode method for measuring powder resistivity instruments. It can eliminate errors caused by the contact resistance between the electrode and the sample, as well as the resistance of the electrode and the connecting wire body. Therefore, it has high accuracy and good repeatability.
b. Reasonable and excellent synchronous pressure and resistivity measurement and control mode.
Overcoming the problems of easy detachment and difficulty in forming and uncontrollable pressure attenuation caused by asynchronous first pressing and then testing.
c. Multi point continuous testing and intelligent fitting of the "resistivity pressure" curve.
Overcoming the traditional single point single chip testing mode and improving work efficiency;
Replacing single point representation with a complete curve is more intuitive.
d. Fully automatic application of multi-point continuous stepped pressure measurement and control conditions, with good repeatability, simplicity, and efficiency.
Overcoming the drawbacks of fatigue and poor consistency in manual pressure application mode, improving work efficiency and testing accuracy.
e. The color screen displays multiple parameters such as resistivity, conductivity, pressure, and height on the same screen.
Overcoming the limitations of digital LED displays that cannot display multiple contents synchronously.
f. Multi channel high-precision ADC module ensures high accuracy in system testing.
Provide five significant digits display for resistivity and conductivity, and four significant digits display for pressure and height.
g. Multi mode selection for human-machine dialogue measurement and control, simple and efficient.
Single machine mode, all parameter settings and function conversion of the instrument are displayed using touch buttons and color screens,
Online mode, equipped with supporting PC software, provides complete and convenient functions such as parameter setting interface, measurement and control interface, historical query interface, online help interface, etc. Used to achieve measurement and control functions for instruments on the PC, as well as functions such as data viewing, editing, saving, printing, and historical query.
h. The instrument has height and pressure self calibration functions, ensuring that the client maintains high-precision measurement and control effects for a long time.
i. Easy to expand and versatile for one machine.
This machine can be directly used as a tablet press, and can also be expanded into a compaction density tester and a compaction density resistivity graph tester.

2.4 Applicable scenarios
This instrument has the characteristics of high measurement accuracy, rich measurement and control functions, simple operation, good stability, good repeatability, and multiple uses for one machine. It is also a new feature that distinguishes it from previous similar testers!
This instrument is suitable for lithium battery positive and negative electrode material factories, graphite carbon factories, coking factories, powder metallurgy factories, universities, research institutes, measurement units, industrial and mining enterprises, etc. It is an important and excellent tool for testing and analyzing the resistivity parameters of powder samples.
3、 Technical parameters
3.1 Characteristic parameters of measurable samples
a. Measurable resistivity range: 15.00 × 10^-6~200.00 × 10³ Ω cm
Resolution: 1.50 × 10^-6~0.01 × 10³ Ω cm
b. Requirements for particle size of measurable samples: It is recommended to have a size of less than 40 mesh, and the larger size should not exceed 10 mesh. If it is too fine, it will not affect the quality!
c. Measurable sample composition: No special requirements, as long as there is no corrosive damage to metal electrodes and plastic cups.
d. Cup selection and sample usage recommendation: Table 3.1-1/2/3 Cup selection and sample usage recommendation.
Table 3.1 Recommended Table for Cup Selection, Sample Dosage, and Pressure Range

Customer service hotline: 400-635-7098