OVERVIEW
The handheld transformer DC resistance tester is lightweight, portable, and simple to operate. It is capable of measuring both inductive loads, such as transformers and reactors, as well as resistive components including copper bars, wires, and switch contacts. Featuring fast measurement speed and high accuracy, it is well suited for a wide range of testing applications.
PRODUCT FEATURES
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Flexible power options: supports both a built-in lithium battery and adaptive 220V AC power supply. A single charge allows hundreds of transformer DC resistance tests, ensuring simple and convenient operation.
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Excellent output capability: offers six selectable current levels with a maximum output of 10A and 25V. An automatic test mode selects the appropriate test current based on the measured sample.
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Wide measurement range with high accuracy: covers 500 μΩ to 50 kΩ with an accuracy of ±(0.2% rdg + 2 dgt), delivering reliable and precise results.
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Three-phase automatic testing: automatically measures three phases and calculates the three-phase unbalance rate, simplifying both testing and data analysis.
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Material selection and temperature conversion: supports winding material selection and resistance temperature correction.
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Comprehensive safety protection: includes back EMF protection, open-circuit protection, power-off protection, overheating alarm, and other safeguards to protect both the instrument and the test object.
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Clear outdoor display: equipped with a 5.6-inch industrial-grade high-brightness color LCD that remains clearly visible even in strong sunlight.
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Convenient data output: optional external printer for on-site printing, along with internal memory and USB storage support.
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Intelligent power management: features automatic LCD backlight dimming to save power, low-battery charging reminders, over-discharge protection, and allows normal operation while charging.
TECHNICAL PARAMETERS
| Item | Description |
| Test current output | 10A, 5A, 1A, 100mA, 10mA, 1mA, Auto |
| Resistance range | 50μΩ ~ 200mΩ @10A 10mΩ ~ 1Ω @5A 100mΩ ~ 20Ω @1A
10Ω ~ 200Ω @100mA 50Ω ~ 2kΩ @10mA 500Ω ~ 50kΩ @1mA |
| Accuracy | ±(0.2%rdg+2dgt) |
| Resolution | Min 0.1uΩ |
| Output voltage | Max 25V |
| Display | 5.6-inch industrial grade high brightness color LCD screen |
| Port | RS232, chharging, USB |
| Protection functions | Multiple protection functions including back electromotive force protection, wire breakage protection, power-off protection, overheating alarm, etc |
| Power supply | Rechargeable lithium batteries; Charger input 100-240VAC, 50Hz/60Hz.
The charging time is about 4 hours, and the usage time is more than 8 hours. |
| Operating conditions | Temperature -10 ~ 50℃; Relative humidity<90%, no condensation. |
