1、 Structural features

2、 Overview
2.1 Basic functions and standards:
The ST2258C graphite carbon four probe tester is a versatile and intelligent comprehensive measuring instrument that uses the principle of four probe measurement to test the resistivity/block resistance of graphite carbon materials. The design of this instrument complies with GB/T 1551-2009 "Method for Measuring the Resistivity of Silicon Single Crystals", GB/T 1551-1995 "DC Two Probe Method for Measuring the Resistivity of Silicon and Germanium Single Crystals", GB/T 1552-1995 "DC Four Probe Method for Measuring the Resistivity of Silicon and Germanium Single Crystals", and references the American A.S.T.M standard.
ST2253-F03 graphite carbon four probe probe, with a straight 6+6+6mm needle pitch, equipped with a nickel plated pointed graphite special probe, and equipped with a four probe instrument to test the resistivity/square resistance of graphite carbon block material.
2.2 Complete instrument composition: composed of ST2258C four probe host, ST2253-F03 graphite carbon special four probe probe, and connecting wires.
2.3 Advantages and characteristics:
1: This tester has added an automatic classification function for test results, which can be classified into 10 categories.
2: Customizable USB communication interface for easy expansion into testing modules in integrated testing systems.
3: 8-speed ultra wide range, industry-leading. Generally, the gear range for peers is five to six.
4: Instrument miniaturization, manual/automatic integration.
5: The instrument is easy to operate and has stable performance. All parameter settings and function conversions are input using digital keyboards, which is simple and eliminates the instability of analog locators.
2.4 Probe features and instructions for use:
1: Can measure pieces, blocks, bars, etc.
2: Probe spacing: straight line 6+6+6 mm needle spacing.
3: Probe mechanical drift rate: ± 0.5%.
4: Probe: freshly plated nickel, Φ 2.0mm.
5: Pressure: 0-500g adjustable, with a rated pressure of approximately 400g.
6: The probe is a quick disassembly and replacement type, which is convenient for frequent use on the production line.

3、 Basic technical parameters
1. Measurement range and resolution
Resistance: 1.0 × 10-6-20.00 × 103 Ω, resolution 0.1 × 10-6-0.01 × 103 Ω
Resistivity: 1.0 × 10-6-20.00 × 103 Ω cm resolution 0.1 × 10-6-0.01 × 103 Ω cm
Block resistance: 5.0 × 10-6-100.0 × 103 Ω/□ Resolution 0.5 × 10-6-0.1 × 103 Ω/□
2. Range division and error level

3. Power supply
Input: AC 220V ± 10%, 50Hz Power consumption:<20W
4. Overall dimensions and weight:
Host: 220mm (length) × 245 mm (width) × 100mm (height), net weight: ≤ 2.5kg