How can I measure the current a device consumes?
I tried one that has 1.5 V power supply requirement. I measured its resistance with a DMM from the power supply box (with the batteries removed) by connecting the two poles. It read 1.41 Mohm, so I thought the answer is more than 1 microampere.
When I put the DMM in series with the power supply (with batteries installed) reads 2.45 mA i.e. gives device resistancr about 0.6 kohm (1.5V / 2.45 mA.)
What is the correct method to measure the current?