Meter Illogical

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   When measuring voltages around a circuit you may get some illogical results... Why?

All multimeters have an input resistance when measuring on the voltage ranges.

This input resistance appears in parallel with the resistance of the part of the circuit you are measuring.

If the circuit resistance is high the meter input resistance may be low enough to drag the voltage down.

Hence the illogical measurement.

Just thought it may be of interest?

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Graham Slee Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16314	Post Options Post Reply Quote Graham Slee Report Post Thanks(0) Quote Reply Topic: Meter Illogical Posted: 22 Apr 2009 at 2:20am
	When measuring voltages around a circuit you may get some illogical results... Why? All multimeters have an input resistance when measuring on the voltage ranges. This input resistance appears in parallel with the resistance of the part of the circuit you are measuring. If the circuit resistance is high the meter input resistance may be low enough to drag the voltage down. Hence the illogical measurement. Just thought it may be of interest?
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