How to compensate/calibrate temperature-controller offset on XZ-960 / XZ-480 series ovens?

How to set the temperature controller:

(1) Press jump key ①; display ⑤ shows "SV" to enter.

SV

(2) Use keys ② and ③ to raise/lower to the required temperature.

(3) Press jump key ① to return to the home screen; temperature adjustment is done.

⑷"PV" "SV"

temperature value.

Temperature controller setup video: