I have successfully used a scale value to convert a value to a G value using advice from the manufacturer's forum. For example, when the accelorometer has no force on an axis, it will read 0G. When I apply gravity force, it will change to a ridiculous value like 7G. When the force is removed, it will not go back to 0G — it will go to a random value from -4G to 4G.
Research has revealed that the accelorometer has an impedence of 32kOhms. See the below image for details on the MCU impedence:
Is there anyway to reliably go from a analog input to a G value using this setup? This is going to be used in a vehicle for data recording during impacts. I have spent $18 on this analog accelorometer, and would not like to purchase a digital accelorometer unless absolutely necessary.
Disclaimer: The truth is, I have no clue what any of this impedance stuff means. I just determined this was the most likely issue from here. They stated that the likely cause is difference in impedance combined with interference from the MCU clock(s). I am not an electronics engineer, I am a software engineer with some basic electronics experience.