- Leon Zhang sales consultant
- Email: zxl635973785@gmail.com
- Phone/WhatsApp/Wechat: +86 13655813266
HF-TC-612 Handheld Loop Resistance Tester
This Handheld Loop Resistance Tester outputs constant large DC current to accurately test high-voltage breaker loop resistance. Compact, battery-powered design supports field testing, with data storage and anti-interference performance for substation routine maintenance work.
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It is used to measure contact resistance and loop resistance of various high-current switches, as well as contact resistance of cables and welding seams.
Features & Main Functions
- Large test current fully complies with national standards for contact resistance testing.
- High output voltage delivers a wide measuring range.
- Test current is supplied by a high-precision constant current source to ensure fast and accurate measurement.
- Adopts four-wire measurement wiring to eliminate the influence of test lead resistance on test results effectively.
- Fast testing speed: test results are displayed in around 2 seconds.
- Equipped with a 320*240 true-color TFT touch LCD screen with clear display under strong ambient light; the operation interface supports both Chinese and English languages.
- Measured data can be printed in real time, saved in the device memory or exported to a USB flash drive.
- Built-in real-time clock facilitates users to query, analyze and manage historical test data.
- Equipped with RS232 and Bluetooth data interfaces for communication and control with upper computers (Bluetooth requires a matching adapter).
- Adopts intelligent power management technology. The device runs at the minimum power state to reduce internal heat generation, lower power consumption and save energy.
- Whole-process voice broadcast function is available.
- Automatic power-off if no operation is performed within five minutes.
Technical Specifications
| Item | Specification |
|---|---|
| Test Current | 50A, 100A |
| Measuring Range (test leads included) | 0 ~ 20mΩ (50A); 0 ~ 10mΩ (100A) |
| Resolution | 0.1μΩ (minimum) |
| Accuracy | ±0.5% (±2 digits) |
| Measurement Mode | Quick measurement / Timed measurement |
| Power Supply | DC12V / 6400mAh |
| Operating Temperature | -10℃ ~ 40℃ |
| Relative Humidity | ≤80%, non-condensing |
Packing List for Handheld Loop Resistance Tester
| Serial No. | Name | Quantity |
|---|---|---|
| 1 | Handheld loop resistance tester main unit | 1 set |
| 2 | High-current test cables & test clamps | 1 group |
| 3 | DC charging adapter | 1 piece |
| 4 | USB data transmission cable | 1 piece |
| 5 | Operation manual & factory test certificate | 1 set |
| 6 | Storage carrying case | 1 piece |
| 7 | Spare fuses and small wearing parts | 1 pack |
Why Choose Our Handheld Loop Resistance Tester
1. Excellent Testing Performance
This tester uses a high-precision constant current source paired with the four-wire testing method to offset interference from test lead resistance. Test results can be output within only 2 seconds, with a resolution of 0.1μΩ and test accuracy controlled at ±0.5%, fully meeting international standards for high-voltage switch loop resistance testing.
2. Portable Handheld Structure for Field Work
Equipped with a built-in 12V high-capacity lithium battery, it works wirelessly without external power supply, ideal for on-site substation maintenance. The compact and lightweight body is designed specifically for handheld outdoor detection operations.
3. Abundant Practical Functions
Fitted with a high-brightness TFT touchscreen with Chinese and English bilingual UI. It supports data storage, USB export and real-time printing, alongside full voice broadcast. RS232 and Bluetooth interfaces are available for data upload to host computers. Intelligent power management plus a 5-minute auto power-off function effectively prolong battery service life.
4. Stable & Safe Long-term Operation
The equipment runs at low power to reduce internal heat generation, equipped with matched fuses and standard accessories. Each instrument undergoes strict factory calibration to ensure stable performance under long-term frequent field working conditions.
5. Complete After-sales Service
Full sets of delivery accessories, detailed operation manuals and official factory calibration certificates are supplied together. We provide long-term spare parts supply and professional technical support for your power maintenance projects.
FAQ for Handheld Loop Resistance Tester
Q1: What is the measuring range and core accuracy of this tester?
A: It supports 50A & 100A test current. The measuring range is 0~20mΩ (50A) and 0~10mΩ (100A), with 0.1μΩ minimum resolution and accuracy of ±0.5% (±2 digits).
Q2: Why adopt the four-terminal wiring connection?
A: The four-wire testing method can effectively eliminate the resistance influence of test wires and clamps, ensuring authentic and accurate actual resistance measurement data.
Q3: How fast can the test results be displayed after measurement?
A: This device adopts a high-precision constant current source. Stable test data will be displayed on the screen in only about 2 seconds with high testing efficiency.
Q4: Does the instrument support data storage and data export?
A: Yes. Test data can be saved locally inside the machine, printed in real time or exported to a USB flash drive for later check and analysis.
Q5: What communication ports are equipped on the tester?
A: It is fitted with RS232 interface and Bluetooth interface for data transmission with upper computers; an extra adapter is required for Bluetooth connection.
Q6: What are the power supply and battery standby features?
A: Powered by built-in DC12V 6400mAh lithium battery. Intelligent power management reduces internal heat, and the machine will auto power off if no operation within 5 minutes to save power.
Q7: Can the screen be used normally under strong sunlight outdoors?
A: It adopts a 320*240 TFT true-color touch screen with clear display under strong light, and the operation interface has both Chinese and English versions.
Q8: What working environment conditions does the tester adapt to?
A: The applicable temperature range is -10℃ ~ 40℃, relative humidity ≤80% with no condensation, suitable for most outdoor substation field maintenance scenarios.
Q9: Does the device have voice prompt function during testing?
A: Full-process voice broadcast is supported, which helps operators quickly grasp the test status without staring at the screen all the time.
Q10: What test objects is this handheld loop resistance tester used for?
A: It measures loop resistance and contact resistance of high-current switches, as well as contact resistance of cables and welding seams in power systems.
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