Pitch wheels generate a pair of MIDI messages. Their data values are combined to give a range of 8191 to -8192 (or 8192 to -8191, I forget). The central value is 0 within that range.
Now, brace yourself
:
As MIDI cannot carry negative numbers, a PW value of 0 is stored as 8192. This is stored as 2 separate bytes in the MIDI message, least significant 7 bits and most significant 7 bits
8192 = hexadecimal 2000, in binary = 10 0000 0000 0000
Moved to 2 7-bit bytes (LSB and MSB) this = 000 0000 and 100 0000
And those values in hexadecimal are 00 40
Does that help?
Can you Record the Pitch Wheel and see what values you are getting in the MIDI Editor / Event List?
PS your imgur link need a .png on the end of it:
https://i.imgur.com/rwv8UT6.png