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CRH.200A

CRH
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The CRH.200A is a lightweight, high-precision contact resistance tester designed for testing the main contacts of high and low voltage switches, wire joints, switchgear, and relay contacts. Built according to the latest DL/T 845.4-2004 power standard, it combines advanced high-frequency switch power technology with digital circuit design for reliable, accurate performance.

With selectable DC test currents up to 220 A and resolution down to 0.01 μΩ, the CRH.200A delivers accurate results across a wide test range. Powered by a built-in lithium-ion battery, it supports up to 400 switching tests per charge, making it ideal for field use. Data can be stored internally, printed via an optional external printer, or transmitted via Bluetooth for seamless integration into standardized testing platforms.

Function

• Contact resistance testing of high/low voltage switches, relays, and cable joints
• Output DC currents up to 220 A, with selectable lower ranges
• Measurement range: 0.01 μΩ – 3500 mΩ
• Resolution: 0.01 μΩ
• Test times selectable: Quick test, 10–60 seconds
• Internal data storage for 100 test results
• Bluetooth and USB communication for data transfer
• Lightweight, portable design with lithium-ion battery power
• Compliant with DL/T 845.4-2004 national power standard

Technical Specifications

output current

  • ≤5 A, 10 A, 30 A, 50 A, 80 A, 100 A, 200 A, 220 A

test time

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

  • ≥60 s continuous at 220 A

test range

  • 0.01 μΩ – 3500 mΩ

resolution

  • 0.01 μΩ

accuracy

  • ±(0.5 % + 2 digits)

data storage

  • 100 groups of test results

interfaces

  • Bluetooth communication via mobile app

  • USB connection for result storage and download

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 with currents up to 220 A

  • Resolution as fine as 0.01 μΩ

  • Lightweight and highly portable design (2.2 kg)

  • Lithium-ion battery supports 400+ tests per charge

  • DL/T 845.4-2004 compliant design

  • Bluetooth communication for app-based data handling

  • USB interface for PC connection and result transfer

  • Internal storage for 100 results

  • External printer option for onsite report printing

Standard Accessories

  • CRH.200A tester unit

  • 10 m test lead set

  • Power adapter/charging cable

  • Ground cable

  • Instruction manual

  • USB cable

  • Carrying case

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