King-Meter KM5S–LCD - Power-On Password Modify; Normal Parameter Setting; Wheel Diameter Setting

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Power-on Password Modify
UP and DOWN is to change the number, and MODE is
to select digit one by one, finally to hold MODE to confirm
the modification.
Password Modify Page
Normal Parameter Setting
Hold both UP and DOWN for 2 seconds to enter User
setting .But hold both DOWN and MODE over 2 seconds is
to enter password 0512 to modify the wheel size.
Password Inputting Page
Wheel Diameter Setting