I am measuring the voltage drop across a 1 ohm resistor within a circuit with an oscilloscope and a multimeter.
The impedance of the oscilloscope is 1M ohm and the impedance of the multimeter is 10M ohm.
I am reading approx 5mV when using the multimeter and approx 2mV with the oscilloscope.
Which of these two values would be most accurate, if any and if not, how would I go about ensuring the voltage drop measured across the resistor is accurate?
Accuracy of equipment:
- [3%×(|reading|+|offset|)+1%×|offset|+0.2div+2mV], ≤100mV/div
- 1.0% + 3 counts
- 10mV / div
- mV setting with resolution of 0.1mV