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CRM 100B+ / CRM 200B+ Portable Contact Resistance Meter

The CRM 100B+ and CRM 200B+ are next-generation high-current contact resistance meters using ultra-capacitor technology, making them the lightest 100 A and 200 A micro-ohm testers available.
Designed for EHV switchyards, they deliver highly stable contact resistance measurements even in the presence of intense electromagnetic noise up to 765 kV.

With high-speed sampling, autoranging, in-built printer, Li-ion battery operation, and advanced CData CRM+ PC software, the CRM+ series is ideal for power utilities, OEMs, testing contractors, and commissioning engineers.

Model Options

Key Features

  • Ultra-capacitor technology → super lightweight 100 A / 200 A meters

  • Direct micro-ohm measurement using Kelvin 4-wire method

  • High-speed simultaneous sampling of test current & voltage drop

  • Stable, accurate readings even in high-noise EHV switchyards

  • Autoranging with direct micro-ohm display (no manual math)

  • Battery-powered → fully portable for remote sites

  • In-built thermal printer for on-site reporting

  • Data storage with timestamps (1000 records)

  • USB connectivity + CData CRM+ software for PC control, trend analysis, and reports

  • Rugged IP67 hard molded case

  • No ON/OFF duty cycle – continuous testing capability

  • Supports both Stand-alone and PC-controlled operation

Technical Specifications

Parameter CRM 100B+ CRM 200B+
Test Current 100 A minimum (peak varies with load) 200 A minimum (peak varies with load)
Resistance Range 0.1 µΩ to 299.9 mΩ 0.1 µΩ to 299.9 mΩ
Resolution 0.1 µΩ 0.1 µΩ
Accuracy ±2% ±1 digit ±1% ±1 digit
Output Voltage 10 VDC 17.5 VDC
Display 4-line × 20-char LCD + 3½-digit current display 4-line × 20-char LCD + 4½-digit current display
Printer In-built thermal In-built thermal
Operation Modes Stand-alone & PC-controlled Stand-alone & PC-controlled
Memory 1000 records 1000 records
Battery 11.1 V, 6 Ah Li-ion 11.1 V, 6 Ah Li-ion
Charging 13.5 VDC @ 1.5 A 13.5 VDC @ 1.5 A
Communication USB USB
Software CData CRM+ CData CRM+
Dimensions 340 × 295 × 155 mm 340 × 295 × 155 mm
Weight 4 kg 5 kg

Standard Accessories

  • Calibrated Test Cables, 15 m, with Ck clamps (75 mm opening)

  • Master Earthing Cable, 7 m

  • Battery Charger

  • USB Communication Cable

  • CData CRM+ PC Software (Control, Downloading, Trend Analysis)

  • Carrying Case for Test Leads

  • Instruction Manual

  • Factory Test & Calibration Report

  • Spare Fuses

Applications

  • Contact resistance testing of:

    • Circuit breakers (MV/HV/EHV)

    • Isolators / disconnectors

    • Busbar joints

    • Earth switch joints

    • Welded joints

  • Heat dissipation analysis inside CB interrupters (without opening)

  • Power loss and loose-joint detection

  • Commissioning, QA, and predictive maintenance

Optional Accessories

  • 20 m calibrated cables with 75 mm clamps

  • 25 m calibrated cables with 75 mm clamps

  • Optional Ck clamps: 100 mm or 150 mm opening

  • Special clamps / spikes / probes / connectors

  • Rugged carrying case upgrade

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