Range and accuracy
Range | Effective range of resistance measurement | accuracy |
20MΩ | 0.01～19.99MΩ | ±(5%+3d) |
200MΩ | 5.0～199.9MΩ | ±(5%+3d) |
2GΩ | 0.05～1.999GΩ | ±(5%+3d) |
20GΩ | 0.5～19.99GΩ | ±(5%+3d) |
200GΩ | 5.0～199.9GΩ | ±(10%+3d) |
2000GΩ | 50～1999GΩ | ±(20%+10d) |
be careful:
①The MΩrange calibration voltage is 0.5kV, and the GΩrange calibration voltage is 2.5kV.
②The test voltage range to ensure the accuracy of resistance measurement is above 20% of the nominal voltage range.
③When the test voltage is higher than 8kV, in order to accurately measure the resistance higher than 20GΩ, the exposed high-voltage electrode conductor in the air should be shielded to avoid the impact of air ionization.
④The 2000GΩrange is used as a reference range for use in dry environments with relative humidity less than 70%.
Nickname: Insulation Resistance Tester; Insulation Meter
Features
1. High voltage adjustable: The adjustable high voltage digital tester can output multiple levels of DC high voltage, such as 0~0.25~0.5~2.5~5kV, etc. Users can choose the appropriate test voltage according to the characteristics of the tested object.
2. Digital display: Using an LCD digital display screen, it can intuitively and accurately display the value of the measured insulation resistance, improving the accuracy and convenience of testing.
3. Strong anti-interference ability: The instrument is equipped with an equipotential protection ring and a fourth-order active low-pass filter, which effectively shields the external power frequency and strong electromagnetic field, ensuring accurate measurement even in complex environments.
4. High degree of automation: Some models of adjustable high-voltage digital testers have the function of automatically calculating absorption ratio and polarization index, and can also automatically switch ranges, reducing the complexity and errors of manual operation.
5. Safety and reliability: After high-voltage start-up, manual discharge should be avoided to check the instrument to prevent damage to the tested object and instrument. After the test is completed, wait for the instrument to automatically discharge and the voltmeter to return to zero before performing manual discharge operation.
application area
Adjustable high-voltage digital testers are widely used in high-voltage substations, power plants, and other sites of the power system to measure the insulation resistance characteristics of large high-voltage transformers, motors, remote power cables, or buried cables and other electrical equipment. Meanwhile, it can also be used in fields such as postal and telecommunications, mechanical and electrical installation, and maintenance, serving as a testing tool in these industries.
