I have a few questions about multi meters in general:
1) How does the ohmmeter work? I can find general information online but what I want to know is does it just vary an internal resistance to send a constant current through the measured resistance? Or does the current through the measured resistance vary?
2) How does it measure the capacitance? Does it use an AC or DC signal?
3) How does it measure the voltage drop across a diode? Why doesn't this mode light up an LED and tell me the voltage drop?
Thanks
1) How does the ohmmeter work? I can find general information online but what I want to know is does it just vary an internal resistance to send a constant current through the measured resistance? Or does the current through the measured resistance vary?
2) How does it measure the capacitance? Does it use an AC or DC signal?
3) How does it measure the voltage drop across a diode? Why doesn't this mode light up an LED and tell me the voltage drop?
Thanks