< >>

OK ... second part:

Kind of..
The best way is to take a look at the gauge when it has settled and then , without a time delay , take a sensor reading in OHMS

I leave the car running so I know we keep stable.
A better way , is to look at the temp/resistance chart and go to RS and get a high tolerance resistor and use that in place of the sensor..don't have to run car or heat it up that way.. you are just subing a known value from the chart

remember , the gauge is the single wire sensor , not the other
I will look up that spec , if u can't find it...
Also, to eliminate the =/- of the resistor, take a reading of its
value before usiong it for calibration purposes.. they are all out a bit