Re: Fuel gauge testing

Posted by Fish'n Jim On 2022/3/4 9:24:44

If you're bench testing, you should use a variable power supply/calibrator and not a battery.
A car battery has way too much amperage for this. If the only way you have for power, then use a lead with an in-line 1-3 A fuse max. I'd use a disconnect also.
Otherwise, if it's not correct and shorts you'll light things up at full battery amps.
I think I paid ~$80 of a digital PS that can do up to 4 A. Constant voltage or amperage selectable. Comes in handy for testing. And don't have to lug a big heavy battery around. They make portable calibrators with rechargeable battery units also but more expensive.
You'll need a DVM also.