oem oil temp gauge

[Guest]

My '82 GS750EZ has an oem oil temp gauge. I found a manual for that exact model and in it a test for the gauge. Says to short sensor lead to ground and gauge should read 320F. I did it and it read well over 320. So is the gauge showing it being warmer or cooler that what it actually is?
I found a test of the actual sensor in a manual for an 83 (different part number of sensor) where you hook up an ohm meter to it, would that test work for mine also??
My bike always gets up to 320 or over after a short while, and at that temp the oil should be cooking I would think?. None of the oil i have drained out of it has smelled burnt or anything.
Does anyone know of how i can test the sensor to see if its accurate at all?
I need to put my mind at ease, if there was no temp gauge to begin with I would never have worried

[psyguy]

Does anyone know of how i can test the sensor to see if its accurate at all?

boiling water?

[Ed Vrolijk]

Every temp gauge is basically a voltmeter with a ntc (negative temperature cöeficient) resistor in the temp sensor. Temp goes up, resistance goes down wich results in a higher reading. So yes, you can check it with a ohm meter. To measure correct you have to know the resistance of the resistor at a given temp. However since it's basically a voltmeter your reading will be different when your input voltage is different.
So to measure 100% correct you need to be sure of a lot of parameters, wich in practice is next to impossible because most manufacturers do not give you those parameters.
Follow psyguy's advice, it's the easyest way, and don't worry to much about the oil temp.
Succes,
Ed

[gearhead13]

This is a table from an 83 750 sensor ohm values.

[psyguy]

so, maybe you can put the sensor in boiling water then measure the resistance and see if you get aprox 37ohms?