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Leon Zhang sales consultant
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Email: zxl635973785@gmail.com
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Phone/WhatsApp/Wechat: +86 13655813266
HF-TC-605 Handheld Transformer DC Resistance Tester
This Handheld Transformer DC Resistance Tester adopts lightweight handheld design with lithium battery and AC dual power supply. It delivers 6 current gears, high precision and temperature conversion function for on-site testing of transformers, CT, reactors and switch contact resistance.
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The HF-TC-605 Handheld Transformer DC Resistance Tester is an innovative compact instrument with handheld lightweight design for easy portability.
It is applicable to inductive test objects including transformers, current/voltage transformers and reactors, as well as resistive samples such as copper busbars, wires and switch contacts, featuring rapid testing and high measuring precision.
Features & Main Functions
- Dual power supply compatible: built-in lithium battery or 220V AC mains. Fully charged battery supports continuous DC resistance testing for hundreds of transformers with simple operation.
- Six selectable output current gears, max. 10A current and 25V output voltage, with auto current selection for efficient operation.
- Wide measuring range and high accuracy: 500μΩ ~ 50kΩ.
- Built-in resistance temperature conversion function; optional wireless temperature measuring module for real-time sample temperature detection to guarantee precise converted resistance values.
- Multi-protection mechanisms: back EMF protection, open-circuit protection, power failure protection and overheat alarm.
- 5.6-inch high-brightness industrial color LCD screen with clear display under strong sunlight.
- Supports external printer for test data printout.
- Dual data storage modes: local internal memory and USB flash disk storage.
Technical Specification Table
Current Gear & Measuring Range
| Output Current | Resistance Range | Output Current | Resistance Range |
|---|---|---|---|
| 10A | 500μΩ ~ 200mΩ | 100mA | 10Ω ~ 200Ω |
| 5A | 10mΩ ~ 1Ω | 10mA | 50Ω ~ 2kΩ |
| 1A | 100mΩ ~ 20Ω | 1mA | 500Ω ~ 50kΩ |
Technical Specifications
| Item | Parameter | Item | Parameter |
|---|---|---|---|
| Accuracy | ±(0.2% of reading + 2 digits) | Maximum Resolution | 0.1μΩ |
Operating Conditions & Physical Dimensions
| Item | Parameter | Item | Parameter |
|---|---|---|---|
| Power Supply | Built-in lithium battery or external charger; Charger input: 100~240VAC, 50Hz/60Hz | — | — |
| Charging Voltage | 16.8V | Charging Current | ≤3A |
| Charging Time | Approx. 4 hours | Continuous Working Time | Over 8 hours |
| Main Unit Weight | 1.6kg (excluding test leads) | Unit Dimensions | 246mm(L) × 156mm(W) × 62mm(H) |
| Operating Temperature | -10°C ~ 50°C | Relative Humidity | ≤90%, non-condensing |
Applications of Handheld DC Resistance Tester
This Handheld Transformer DC Resistance Tester accurately measures DC resistance of inductive windings and metal conductors. It checks open circuits & loose connections of transformers, CT/PT, reactors and motors, tests contact resistance of switch contacts, busbars and cable terminals for overheating risks, ideal for factory inspection, substation handover and outdoor maintenance tests.
Our Advantages
Our Handheld Transformer DC Resistance Tester stands out with compact lightweight design, dual lithium battery & AC power supply, wide measuring range and high precision. It integrates temperature conversion, multi-protection circuits and data storage, perfectly fitting outdoor substation field testing.
FAQ for Handheld Transformer DC Resistance Tester
Q1: What equipment can this Handheld Transformer DC Resistance Tester measure?
A: It tests inductive devices including transformers, CT, PT, reactors and motors; it also measures resistive samples such as copper busbars, wires, circuit breaker contacts and cable terminals.
Q2: What scenarios is this tester suitable for?
A: Factory delivery inspection, substation handover test, annual preventive maintenance, outdoor power equipment overhaul, new energy wind/PV transformer inspection, and rail transit traction equipment testing.
Q3: Does the tester work without mains power on site?
A: Yes. It is equipped with a built-in lithium battery. A full charge supports continuous testing of over 100 transformers, and the continuous working time exceeds 8 hours for field use without AC supply.
Q4: What is the weight and size of the main unit?
A: The host weighs only 1.6kg (excluding test leads), with dimensions 246mm×156mm×62mm. Compact handheld design for easy carrying and one-person operation.
Q5: Can I charge it with international mains voltage?
A: The matching charger supports 100~240VAC wide voltage input, compatible with global power grids of 50Hz/60Hz.
Q6: What resistance range can this instrument cover?
A: It has 6 current gears from 1mA to 10A, covering a full measuring range of 500μΩ ~ 50kΩ, meeting all low and medium resistance test demands for power equipment.
Q7: What is the measurement accuracy and resolution?
A: Accuracy: ±(0.2% of reading + 2 digits); maximum resolution reaches 0.1μΩ, ensuring stable and precise test data.
Q8: Why does it support resistance temperature conversion?
A: Winding resistance changes greatly with temperature. The built-in temperature conversion function, matched with an optional wireless temperature probe, converts measured resistance to standard temperature value to avoid misjudgment of equipment faults.
Q9: Does the tester automatically select output current?
A: Yes. It features automatic current matching, no need for manual gear switching, greatly simplifying field operation steps.
Q10: Can test data be stored and printed?
A: It supports local internal storage and USB flash disk storage. An external printer can be connected to print test reports directly on site.
Q11: Is the screen visible under strong sunlight outdoors?
A: Adopt a 5.6-inch high-brightness industrial color LCD screen, clear display in strong sunlight without reflection issues.
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