Operating instructions

5.6 Locking/unlocking the keyboard

ThekeyboardoftheDefensorPH28/PH28Acanbelockedtopreventunauthorizedaccesstothe

stored settings.

• Tolockthekeyboard,press<ESC>keyuntil(approx.4seconds)the

adjacent message appears in the display. The keyboard is locked now.

Each time you press any key the adjacent message appears again.

• Tounlockthekeyboard,press<ESC>keyuntil(approx.4seconds)

the message “Key lock” disappears and the operating display is

shown.

Key lock

Set 50%rH

Act 30%rH BA3

Set 50%rH