Hi
in a simple circuit consisting of an exactly measured 100Ohm/5W resistor as a load
(double and triple checked with different multimeters) a stabilized power source and two
multimeters (one continuesly monitoring the voltage and the other measuring the current passing
through the resistor) at various voltages raging from 1.5VDC to 3.3VDC i've noticed that my calculations
for current had nothing to do with what the multimeter measures, there is a 18%difference.
then i got 5-6 different multimeters from different brands not expensive models but
all common ones, analog and digital and i've also noticed the same thing when measuring current... some
where more accurate and some other less accurate but none of them was less than 10%
seems the problem only exists when measuring current..while resistor and voltage measurment appears
to be very accurate i don't know if such thing is reasonable...
in a simple circuit consisting of an exactly measured 100Ohm/5W resistor as a load
(double and triple checked with different multimeters) a stabilized power source and two
multimeters (one continuesly monitoring the voltage and the other measuring the current passing
through the resistor) at various voltages raging from 1.5VDC to 3.3VDC i've noticed that my calculations
for current had nothing to do with what the multimeter measures, there is a 18%difference.
then i got 5-6 different multimeters from different brands not expensive models but
all common ones, analog and digital and i've also noticed the same thing when measuring current... some
where more accurate and some other less accurate but none of them was less than 10%
seems the problem only exists when measuring current..while resistor and voltage measurment appears
to be very accurate i don't know if such thing is reasonable...
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