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CRH.100A

The CRH.100A is a compact, high-precision contact resistance tester designed for testing the main contacts of high- and low-voltage switches, as well as wire, relay, and switch contacts. Built to comply with DL/T 845.4-2004 power standards, it integrates advanced high-frequency switch power supply technology with digital circuit design for fast, reliable, and accurate testing.

With selectable DC test currents up to 100 A and resolution down to 0.01 μΩ, the CRH.100A provides dependable results across a wide measurement range. Powered by a rechargeable lithium-ion battery, it supports at least 400 switching tests per charge, making it highly portable and well-suited for field use. Data can be stored internally, transferred via USB, or sent directly to a PC or mobile device over Bluetooth.

Function

• Measurement of contact resistance in circuit breakers, switches, relays, and wire joints
• Output DC test currents: ≤5 A, 10 A, 30 A, 50 A, 80 A, 100 A
• Wide test range: 0.01 μΩ – 3500 mΩ
• Resolution: 0.01 μΩ
• User-selectable test times: quick test or 10–60 seconds
• Data storage for up to 100 test results
• USB and Bluetooth connectivity for easy data handling
• Lightweight and battery-powered for portability
• DL/T 845.4-2004 compliant design

Technical Specifications

output current

  • ≤5 A, 10 A, 30 A, 50 A, 80 A, 100 A

testing time

  • Quick test, 10 s, 20 s, 30 s, 40 s, 50 s, 60 s

  • ≥60 s continuous at 100 A

test range

  • 0.01 μΩ – 3500 mΩ

resolution

  • 0.01 μΩ

accuracy

  • ±(0.5 % + 2 digits)

data storage

  • Up to 100 sets of results

interfaces

  • USB for storage and download

  • Bluetooth communication via app

battery

  • 12.6 V, 9000 mAh rechargeable lithium-ion

  • ≥400 switching measurements per charge

test leads

  • 10 m, 16 mm² + 1.6 mm²

protection

  • Plug-in 40 A fuse

environmental conditions

  • Temperature: 0 °C to +50 °C

  • Humidity: < 80 %

dimensions

  • 188 × 85 × 312 mm

weight

  • ~2.2 kg

Key Features

  • High-precision contact resistance measurement up to 100 A

  • Resolution down to 0.01 μΩ

  • Four-wire Kelvin testing method

  • Compact, lightweight design (2.2 kg)

  • Lithium-ion battery with 400+ tests per charge

  • Bluetooth and USB connectivity for PC and mobile integration

  • DL/T 845.4-2004 compliant

  • Optional external printer for onsite reporting

  • Fast, reliable operation with multiple test time settings

Standard Accessories

  • CRH.100A tester unit

  • 10 m test lead set

  • Power adapter/charging cable

  • Ground cable

  • USB cable

  • Instruction manual

  • Carrying case

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