The measurement of DC resistance is a mandatory test item for transformers, mutual inductors, reactors, electromagnetic operating mechanisms, and other inductive coils during semi-finished and finished product factory tests, installation, commissioning tests, and preventive tests in power departments. It can effectively detect manufacturing defects such as material selection, welding, loose connections, missing strands, and broken wires in inductive coils, as well as hidden dangers after operation. To meet the need for rapid measurement of DC resistance in inductive coils, Tuopu Company has developed the TPZRC-D handheld DC resistance tester using its technical advantages.
The TPZRC-D handheld DC resistance tester is a digital, tool-oriented, handheld and portable DC resistance measuring instrument. It adopts new power supply technology and features small size, light weight, easy portability, large output current, wide range, digital display, and internal lithium battery power supply. The whole machine is controlled by a microcontroller, automatically completing self-check, data processing, display, and other functions, with automatic discharge and discharge indication functions. The instrument has high testing accuracy and is easy to operate, enabling rapid measurement of DC resistance.
Functional Features
1. This handheld DC resistance tester has a large output current and is lightweight.
2. The instrument provides 6 output current selections, with a maximum output of 10A.
3. The instrument has a wide measurement range of 0 to 50kΩ, suitable for inductive test objects such as transformers, mutual inductors, reactors, generators, and motors, as well as for switches, copper bars, contactors, relay contacts, metal wires, cable accessories, and other test objects.
4. It has a comprehensive protection circuit for more reliable performance. In case of accidental disconnection of test leads or power interruption, the built-in discharge circuit and back-EMF protection circuit provide strong arc resistance.
5. Powered by a lithium-ion battery, it is convenient for field operation and can work continuously for more than 8 hours.
6. The instrument features a perpetual calendar, 99 sets of data storage, and manual temperature conversion functions, with data not lost when powered off.
7. It uses a large color LCD screen with a graphical interface, which is intuitive and concise, with clear and readable data, supporting Chinese-English switching for field use.
8. It has audible and LCD discharge indication functions, with clear discharge indication to reduce misoperation.
9. This instrument features high accuracy, shock resistance, anti-interference, high stability, and portability.
Technical Specifications
1. Output current: 10A, 5A, 1A, 300mA, 100mA, 5mA
2. Measurement range: 500μΩ~0.1Ω (10A)
1mΩ~0.2Ω (5A)
50mΩ~6Ω (1A)
100mΩ~20Ω (300mA)
500mΩ~60Ω (100mA)
30Ω~50kΩ (5mA)
3. Accuracy: ±(0.2%±3 digits)
4. Resolution: 0.1μΩ
5. Ambient temperature: -10~40℃
6. Ambient humidity: ≤80%RH, no condensation
7. Storage conditions: -20℃~50℃, ≤95%RH, no condensation
8. Power supply: DC: built-in 12.6V/4.8AH lithium battery