Hi I want to buy a new Multimeter and there are a few features that currently I have no idea what they mean. Obviously I currently have no idea for those features but I wondered if somebody can explain to me what they are/do so maybe in the future I will need them.
Sadly (and surprisingly) none of the four were on the Common DMM Terminology link from that page.
Conductance is the multiplicative inverse of resistance, G = 1/R, in units of siemens (sadly, no longer mhos). Not terribly useful most of the time but easy to derive for a digital meter and makes another "range" that Marketing can flog. G not C since C was already taken.
Motor drive may go along with smoothing. It's a feature mostly useful for voltage/frequency measurements of large electric motors (duh ;-) because they tend to be electrically very noisy critters and "normal" meters may give false readings.
Duty cycle is the fraction of the period of a when a signal is (selectable) high or low, usually expressed as a percentage. A symmetrical square wave has a 50% duty cycle. Useful in checking an PWM circuit, for example.
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