DC resistance tester

In the preventive testing of power equipment,DC resistance testerPlaying a crucial role. It provides key data for determining whether there are hidden dangers such as inter turn short circuits and poor contacts by measuring the DC resistance of windings such as transformers and motors.

main advantages

The reason why it has become a standard equipment in the power testing industry is due to its following characteristics:

• Accurate and efficient measurement: ModernDC resistance testerBy adopting advanced constant current source technology and fast steady-state algorithms, stable current can be output in a short period of time and resistance values can be quickly read, greatly reducing testing time and improving work efficiency.

  
  

• Stable and reliable dataEquipment usually has strong resistance to power frequency interference and can automatically eliminate the influence of test lead resistance, ensuring stable and repeatable measurement results even in complex on-site environments.

  
  

• Function Integration IntelligenceMany models integrate functions such as demagnetization, temperature conversion, data storage, and Bluetooth printing, which can automatically convert resistance values to standard temperatures (such as 20 ℃) for comparison, simplifying the later data processing process.

  
  

• Security guarantee*The equipment is designed with discharge protection and back electromotive force protection circuits, which can automatically release the energy in the inductance after testing, effectively ensuring the safety of operators and equipment.

  
  

Important precautions during equipment use

To ensure the accuracy of test results and the safety of the operation process, the following points should be noted when using:

• Fully dischargeBefore testing, it is necessary to ensure that the tested equipment has been powered off and the winding has been fully discharged to prevent residual charges from affecting the test or endangering safety.

  
  

• Correct wiringStrictly follow the instrument manual for wiring, ensuring that the current wire and voltage wire are separated, firmly clamped, and in good contact to reduce errors caused by contact resistance.

  
  

• Environmental considerationsRecord the ambient temperature during testing for accurate data conversion. Avoid high-precision measurements in environments with strong electromagnetic interference or temperature and humidity.

  
  

• Choose the appropriate rangeBased on the estimated resistance value of the tested winding, select the appropriate testing current and range. Excessive current may cause the winding to heat up, affecting measurement accuracy.

  
  

• Pay attention to the testing processDuring the testing process, it is necessary to observe whether the equipment is working properly and wait for the readings to stabilize before recording. After the test is completed, follow the instrument instructions for safe discharge.