Digital microhmmeter HZ2374

bench-toplow-resistancewith automatic temperature correction

Product overview
The HZ2374 contact resistance tester by Huazheng is a DC constant-current instrument designed to measure contact, cable and weld joint resistance under standardized current conditions (national GB736 reference). It integrates switching power supply technology and advanced electronics to support configurable output ranges and long-duration tests while protecting data and equipment.

Key features

• 7" 800×480 color touch screen with interactive UI and integrated high-speed thermal printer for on-site reports.
• Wide-range continuous current output: configurable 1–3 current ranges; supports models up to customizable 10–5000A and automatic averaging.
• Digital readout of resistance, voltage, current and temperature-compensated resistance values.
• Configurable pass/over-limit/invalid thresholds with automatic alarm and test status generation.
• Programmable test time 0–9999 s; forced cold-air cooling and automatic power protection for long tests.
• High-precision measurement using precision instrumentation amplifiers and multi-integral A/D conversion.
• 32-bit ARM system IC with automatic range/gain switching to maintain accuracy.
• Internal calendar/clock for timestamped records and prints; removable USB for data export.
• Standard Modbus-RTU (RS232 standard, RS485 optional) plus Bluetooth and Android app for remote control and data upload.
• Optional cable control switch, wireless remote controller and quick-lock large-current cable connectors.
• Automatic temperature compensation by preset value or external sensor.

Technical parameters
Selection: 100A | 200A | 300A | 400A | 500A | 600A | 10–5000A (customizable)
Test range: 0–19999 mΩ (expandable)
Accuracy: 0.5% rdg ± 10 dgt
Resolution: 0.01 mΩ
Programmable test time: 0–9999 s
Power supply: AC 220V ±10%, 50Hz ±2%
Operating temperature: -25°C to 50°C; RH ≤ 90%
Typical dimensions (examples): L 450 mm × W 250 mm × H 220–280 mm
Typical weight (examples): ~9.9 kg (100A) / ~12.9 kg (200A)

Accessories & options

• Temperature sensor for automatic compensation (optional).
• Removable USB flash drive for data export.
• Bluetooth module and Android app for control and file generation.
• RS485 communication option and Modbus-RTU support.
• Cable control switch, wireless remote controller and custom current ranges.

Model specifications

• Model: HZ2374
• Brand: Huazheng
• Display: 7" color touch screen, 800×480
• Output currents (examples): 100A, 200A, 300A, 400A, 500A, 600A; customizable to 10–5000A
• Data storage: internal large-capacity storage, removable USB, PC export via app/Modbus/Bluetooth
• Printer: built-in high-speed thermal printer
• Cooling/protection: forced cold-air dissipation and automatic power protection