The DC resistance tester adopts the typical four-wire measurement method to improve the accuracy of resistance measurement (especially low resistance). The programmable constant current source, programmable preamplifier, and A/D converter constitute the main body of the measurement circuit. The central control unit applies a constant, high-precision current to the external load under test by controlling the constant current source, and then processes the obtained data (including the test voltage, current test current, etc.) to obtain the actual resistance value.
This instrument can store 255 test data and can print all stored test data. The stored data will not be lost when the instrument is reset or powered off.
1. Current ranges
Single channel: 1A 5A 10A 30A
Three channels: 1A 5A 10A
Three channels continuous: 1A 5A 10A
4. Dimensions: 430×270×330mm
6. Ambient temperature: -20℃～+45℃
7. Ambient humidity: ≤80%
8. Working power supply: AC220V±10%
To ensure safe and reliable operation of the instrument, please note the following:
1. For no-load tap-changing windings, do not switch the no-load tap changer during testing or before discharge is complete.
2. For inductive test objects, do not remove the test leads until discharge is complete (when the buzzer stops sounding).
3. If external AC220V power suddenly fails during testing, the instrument will automatically begin discharging. Do not remove the test leads immediately; wait at least 5 minutes before removing them.
