HF-TC-608 Handheld Ground Continuity Tester

Features & Main Functions

1. Controlled by a 32-bit ARM microcontroller, high automation level and simple operation.
2. Adopts innovative power supply technology with multiple current gears and wide measuring range; test current can be automatically selected according to loads.
3. 800*480 dot matrix 24-bit true-color LCD touch screen, clear display under strong light, dual operation via touch screen and physical keys.
4. Full-process voice broadcast with selectable male/female voice prompts.
5. USB interface supporting data storage via USB flash drive.
6. Comprehensive protection circuits reliably shield the instrument from reverse electromotive force impact for enhanced stability.
7. Fast response speed, stable measured data with automatic real-time data refresh during testing.
8. Intelligent power management technology reduces internal heat generation and saves power consumption effectively.
9. Non-volatile real-time clock and memory to permanently store test data without power supply.
10. Built-in rechargeable lithium battery.
11. Chinese & English language switching function.
12. Optional Bluetooth printer for on-site printing.
13. Auto power-off after 5 minutes of inactivity.

Technical Specifications

1. Output Current: 5mA, 100mA, 300mA, 1A, 5A, 10A, Auto Mode
2. Resolution: 0.1μΩ
3. Measuring Range (5mA gear): 10Ω ~ 50kΩ
4. Measuring Range (100mA gear): 500mΩ ~ 30Ω
5. Measuring Range (300mA gear): 100mΩ ~ 10Ω
6. Measuring Range (1A gear): 10mΩ ~ 3Ω
7. Measuring Range (5A gear): 2mΩ ~ 1Ω
8. Measuring Range (10A gear): 0.5mΩ ~ 0.4Ω
9. Measuring Range (Auto Mode): 0.5mΩ ~ 50kΩ
10. Accuracy: < ±0.2% reading ±2 digits
11. Operating Temperature: -10℃ ~ 40℃
12. Operating Humidity: Less than 80% RH, non-condensing

• Ultra-portable design for field operation

  Compact body weighing only around 2 kg; certain models measure merely 200mm×100mm×60mm. Equipped with a high-capacity built-in lithium battery, it supports thousands of tests per full charge. Single-person transport is available for off-grid outdoor sites such as substations and field poles, outperforming conventional desktop testers by a large margin.
• High precision and powerful anti-interference performance

  Adopting the 4-wire measurement principle to eliminate contact resistance errors of test leads, the instrument delivers measuring accuracy up to ±0.5%. Its readings stay stable within ±1 digit under strong electromagnetic interference in substations, fully complying with the industry standard DL/T 845.6—2022.
• Intelligent functions greatly boost testing efficiency

  Fitted with a 7-inch high-brightness touch screen for clear visibility under intense sunlight. It provides constant current output across multiple ranges from 1A to 10A, which automatically breaks through oxide films on measured contacts. Internal non-volatile storage holds up to 1000 test records. Selected models embed intelligent diagnostic algorithms that generate maintenance recommendations, realizing integrated testing, data logging and fault diagnosis.
• Wide compatibility for all application scenarios

  It performs ground continuity tests for equipment of 110kV and below, and also supports low-resistance measurement. Complete protective circuits against reverse electromotive force and overcurrent are integrated to meet earthing maintenance demands across power, chemical, rail transit and other industries.