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CRM 200B Contact Resistance Meter

CRM_200B
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The CRM 200B is a high-current 200 A contact resistance meter engineered for precise measurement of very low resistances in switchgear, busbar assemblies, circuit breakers and transformer connections. Its true four-wire Kelvin method and continuous regulated current output ensure stable and repeatable readings even in noisy field conditions. The instrument is built for industrial reliability and accuracy in both laboratory and on-site applications.

Key Features

  • High-current output up to 200 A DC for low-resistance measurement

  • True four-terminal Kelvin method for precision and stability

  • 0.1 µΩ resolution for micro-ohm range testing

  • Automatic current reversal for EMF error elimination

  • Built-in over-temperature, over-current and open-circuit protection

  • Large back-lit LCD display for clear readout

  • RS-232 / USB data interface for report generation

  • Rugged metal chassis with cooling fan for continuous operation

Technical Specifications

Parameter Specification
Output Current 10 A – 200 A DC (selectable)
Resistance Range 0.1 µΩ – 299.9 mΩ
Resolution 0.1 µΩ
Accuracy ± 0.5 % of reading ± 2 digits
Display 4½-digit LCD
Power Supply 230 V AC ± 10 %, 50 Hz
Protection Thermal / short-circuit
Communication RS-232 / USB
Dimensions 430 × 370 × 190 mm
Weight ≈ 14 kg

Standard Accessories

  • Current and potential Kelvin test leads

  • Power cord

  • Calibration certificate & user manual

  • Carry case with foam lining

Applications

  • Contact resistance testing in switchgear and circuit breakers

  • Busbar and transformer joint verification

  • Quality inspection of connectors and conductors

  • Predictive maintenance and routine electrical testing

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