Analog Input Not registering more than 1.53v

[Z06Luke]

I've been working on a project in which I've built an Arduino powered accelerometer that outputs an analog voltage from 0-5v (I have the hardware for true analog output, not PWM as Arduino only natively supports). I'm attempting to datalog the accelerometer using the analog inputs on my FlashScan V2.

I have determined with my Fluke multimeter that the output range of the accelerometer is exactly what I have intended, but EFI Live shows a maximum voltage of 1.53v, even when the accelerometer is outputting a voltage greater than this. When the accelerometer voltage output is below 1.53v it displays the output very smoothly and accurately, but once it goes beyond 1.53v EFI Live won't report the higher voltage.

Any ideas why it's only displaying part of the voltage scale?

[joecar]

How are you displaying/logging the voltage from the FSV2 analog input...?

Which of the 4 analog inputs on FSV2 are you using...?

How is your output device connected/wired to the FSV2 analog input...?

What voltage do you see from FSV2 with each of 1, 2, and 3 AA/AAA batteries (in series)...?

Which FSV2 firmware version are you running...?