Descent Mk2i and transmitter. My watch is showing 20bar difference from my SPG, I have checked the cylinder pressure with other transmitters which read the same as my SPG, therefore is there a way of resetting my transmitter. I have uninstall, done update

Descent Mk2i and transmitter. My watch is showing 20bar difference from my SPG, I have checked the cylinder pressure with other transmitters which read the same as my SPG, therefore is there a way of resetting my transmitter. I have uninstall, done updates but still have the 20 bar difference.  Can anyone help..thanks