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Fuel gauge measuring
chris_harris_ - 17/4/07 at 03:42 PM

Hi guys, i need to work out what fuel sender i need, so was going to use a variable resistor to try and identify what ohms is empty and what is full. Does anyone see any problem with that, and would one of these Do the job. I have a multimeter to check what i am applying. Cheers

02GF74 - 17/4/07 at 03:58 PM

a lot of fuel guages work with senders that are about 30 ohm full to 270 ohm empty.

those pots you should will work. you would measure resistance across the pot afterwards.

chris_harris_ - 17/4/07 at 04:06 PM

Ok thanks, so we need one that rads to at least 270 ohms then. sothat would probably be the 470k one then? Still there chap enough to mess with anyways.

02GF74 - 17/4/07 at 04:22 PM

quote:
Originally posted by chris_harris_
Ok thanks, so we need one that rads to at least 270 ohms then. sothat would probably be the 470k one then? Still there chap enough to mess with anyways.


ooh no, you need the 1K one (the suffix K is for kilo, greek for 1,000 so 470K = 470,000 ohm way too mcuh for what you want to do); and use the linear tracked one.

I'd sugget using one of thetrim pots since they are cheaper and you only use it once.

chris_harris_ - 17/4/07 at 04:29 PM

Ok think i got it now. But can't see the trim pots, just the top one on the link i puton. code is FW00A. would that be right?