do ammeters that have an independent power supply require a specific voltage to work?
for a DIY project i plan on taking on soon, i need to measure amperage, and i have been looking for a digital ammeter, as the analogue one shave been to bulky to use.
i need to know, if this ammeter will be able to read amperage at 3v-5v
it says it needs 6v -15v input, but this is just to power it, and isnt what is being measured.
i need to know, do ammeters need a current with perticular voltage to properly measure the amperage?
ive seen others that operate on 0-30vdc, and others that must have 12v or 24v, and the rest dont say at all how they work.