HF-WC-601 Loop Resistance Tester

Product Introduction

Main Features & Functions

1. 7-inch HD Color Touch Screen & Built-in Thermal Printer

   800×480 high-definition color touch screen delivers smooth human-machine interaction; equipped with a high-speed thermal printer for instant test report printing.

2. Multi-Gear Large Continuous Current Output

   Equipped with updated power supply hardware to output stable large current continuously for long-time tests. You can select 1 to 3 different current ranges for measurement, and the device will automatically calculate the average resistance value.

3. Multi-Parameter Real-time Display & Standard Temperature Conversion

   Simultaneously shows resistance, voltage, current and resistivity values; automatically converts measured resistance to the resistance value under standard ambient temperature via built-in temperature compensation algorithm.

4. Automatic Over-Limit Resistance Alarm Function

   Set the upper limit threshold of resistance in advance. The tester will automatically distinguish qualified, over-limit and invalid test results and trigger corresponding alarm prompts.

5. Long-Duration Continuous Measurement Support

   Adjustable test time range: 0 ~ 9999 seconds, supporting uninterrupted long-hour operation. Built-in air cooling heat dissipation system and automatic overheat protection for internal switching power supply.

6. Ultra-High Measuring Precision

   Adopts precision operational amplifiers and 4-fold integrating A/D converter, greatly improving the accuracy of micro-ohm resistance testing.

7. 32-bit ARM High-Speed Main Control Chip

   Latest 32-bit ARM microprocessor is adopted; the system automatically switches signal amplification multiples according to measured signal strength to guarantee stable and precise test results.

8. Built-in Real-Time Calendar Clock

   Integrated calendar & timing module, providing accurate time stamps for all stored test data and printed reports.

9. Adjustable DC Constant Current Source (Multi-Purpose Design)

   Output DC current continuously adjustable from 0 to maximum rated current, supporting step-up progressive current tests. One single device can replace multiple independent DC constant current sources to cut procurement costs.

10. Large-Capacity Offline Test Data Storage

    Mass internal memory stores thousands of groups of test records. It supports data browsing, query and power-off data retention to avoid accidental data loss.

11. USB Flash Drive Data Export to Excel

    Standard USB interface allows users to export all saved test data to a USB drive and generate editable Excel files for later sorting and analysis.

12. Modbus-RTU Industrial Communication Protocol

    Comes with standard RS232 communication port; RS485 port is optional for upgrade. It fully complies with Modbus-RTU protocol for industrial system docking.

13. PC Remote Control & Word/Excel Report Generation

    Connect the device to a computer via RS232 serial port to realize remote operation, data uploading, and automatic generation of Word & Excel test reports on PC terminals.

14. Bluetooth Wireless Control & Data Upload

    Bluetooth module is standard configured, matched with dedicated Android APP. You can complete device control, data transmission and Word report generation wirelessly via mobile phones.

15. External Line Trigger Control (Optional) For Assembly Line Work

    Suitable for batch testing on production lines. An external switch can start, pause or terminate tests. A warning indicator will light up once the measured resistance exceeds the preset limit.

16. Wireless Remote Controller (Optional)

    Supports one-click start and stop of tests; the customized remote controller can display real-time test status to simplify on-site operation.

17. Dual Modes Temperature Compensation Calculation

    You can preset standard temperature values to convert resistance readings; or connect an optional external temperature sensor to collect actual ambient temperature for more accurate conversion.

18. Customizable Screen Display Interface

    Adjust screen background styles (textured blue background / textured black background optional), display brightness, standby brightness and standby time according to personal habits.

19. Built-in On-Site Wiring Tutorials

    Detailed wiring diagrams and operation guides are stored inside the device, helping field technicians finish wiring and commissioning quickly.

20. Chinese Input for Test Information Marking

    Support Chinese text entry to fill in substation numbers, equipment codes, staff information and remarks. Custom labels will be saved together with test data for convenient filing and printed report identification.

21. Quick Plug Connection for High-Current Cables

    Adopts new-style quick connectors for heavy-current wires; just insert and twist tightly to complete wiring efficiently, saving plenty of preparation time.

22. Multi-Phase Measurement Customization Options

    Standard configuration: Single-phase measurement. Optional upgrades: Two-phase synchronous test (special for conductor resistance measurement) or Three-phase synchronous test to meet diversified power detection demands.

Technical Specifications

Simplified Operation Steps for Loop Resistance Tester

• Preparations

  Ensure the tested electrical equipment is fully de-energized and grounded. Clean terminal oxide and dirt. Check tester and test cables for intact condition.

• Four-wire Wiring

  Connect thick current clamps outside the test points, thin voltage clamps inside them. Attach the ground wire and mains power supply.

• Parameter Setup

  Power on the device to finish self-check. Select DC test current (50A/100A) and confirm settings.

• Carry Out Measurement

  Hit Start to test. Record the displayed loop resistance value after the test ends. Test 2-3 times and average the results.

  Reconnect cables if poor connection or overload alerts pop up.

• Post-test Work

  Save or print test data as required. Stop output current, wait for discharge, then power off. Disconnect leads and pack all accessories properly.