DONGGUAN LONROY EQUIPMENT CO LTD
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This instrument complies with the requirements of GB/T24521-2018 "Method for Measuring Resistivity of Carbon Raw Materials and Coke". It is a specialized instrument for measuring the resistivity of coke, graphite, calcined fines, calcined anthracite and similar powder materials. The instrument is powered by a high-precision constant current source, with automatic display of current and voltage. It adopts computer-based fully automatic measurement and control, featuring high accuracy and simple operation. It is suitable for use in universities, research institutions, quality inspection and production enterprises.
2.Working principle
Place a certain-sized dry sample into the sample chamber, introduce a certain intensity of current under a certain pressure, measure the voltage drop at both ends of the sample, and calculate the resistivity of the sample based on Ohm's Law.
3.Configuration:
Including one LRWD-II test host, one set of sample fixtures, one set of test software, one data cable, and one computer (configured as per the contract).
4.Technical Parameter
| Parameter / Specification | Details / Value |
| Resistivity Range | 40–4000 μΩ·m |
| Precision | |
| Repeatability | Samples >300 μΩ·m: ≤5% absolute difference Samples <300 μΩ·m: ≤8% relative deviation |
| Reproducibility | Samples >300 μΩ·m: ≤8% absolute difference Samples <300 μΩ·m: ≤10% relative deviation |
| Constant Current Source | Output Voltage: 0–24.0000 V Output Current: 0–1.00000 A |
| Voltage Range | 0–100.00 mV or 0–1000.0 mV |
| Pressure Range | 0–1000.0 N |
| Displacement Range | 0–40.00 mm |
| Loading Method | Motorized loading |
| Control & Data Processing | Computer-linked automatic control, data processing, report generation & print |
| Sample Cylinder Inner Diameter | 16.0 mm – 16.3 mm |
| Power Supply | 220 V, 50 Hz |