Uploaded January 2019 | Updated September 2026, 2 hours ago
You can measure the internal resistance of a multimeter using megger tester.
As you can see in this video, $5 DMM is not accurate and lower internal resistance(1MΩ). So, it will more influence on the measured circuit.
Fluke 107 Internal Resistance = 10 MΩ
Hioki 3244-60 Internal Resistance = 10 MΩ
$5 Multimeter Internal Resistance = 1 MΩ
Another method is using series resistor.
This resistor in combination with the internal resistance will form a voltage divider.
If you apply 5V over a 1M series resistor, and the DMM shows it as 2.5V, then the internal resistance is 1MΩ
You can measure the internal resistance of a multimeter using megger tester.
As you can see in this video, $5 DMM is not accurate and lower internal resistance(1MΩ). So, it will more influence on the measured circuit.
Fluke 107 Internal Resistance = 10 MΩ
Hioki 3244-60 Internal Resistance = 10 MΩ
$5 Multimeter Internal Resistance = 1 MΩ
Another method is using series resistor.
This resistor in combination with the internal resistance will form a voltage divider.
If you apply 5V over a 1M series resistor, and the DMM shows it as 2.5V, then the internal resistance is 1MΩ
