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 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 gear
Single channel 1A 5A 10A 30A
Three channels 1A 5A 10A
Three channels continuous 1A 5A 10A
4. External dimensions 430×270×330mm
6. Ambient temperature -20℃～+45℃
7. Ambient humidity ≤80%
8. Working power supply AC220V±10%
To ensure the safe and reliable operation of the instrument, please note the following points:
1. For no-load tap-changing windings, it is not allowed to switch the no-load tap changer during the test or before the discharge is completed.
2. For inductive test objects, it is not allowed to remove the test leads before the discharge is completed (when the buzzer is sounding).
3. If the external AC220V suddenly loses power during the test, the instrument will start automatic discharge. At this time, it is not allowed to remove the test leads immediately; they can only be removed after 5 minutes.
