GRAPHTEC MT100 - Key Lock Function

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Settings and Measurement
3.5 Key Lock Function
The key lock function allows you to lock all keys by entering a password.
You can set the password to avoid users other than the administrator from operating the keys.
* No password is set at factory default.
Setting the password
(1) Press the , , and ENTER keys at the same time.
(2) The following menu is displayed. Enter a password.
Use the , , , keys to select numbers. Press the ENTER key to confirm the password.
Specifying 0000 will disable password operation.
Setting the key lock
Hold down the and keystogether for at least two seconds.
When all keys are locked, the indicator will change to .
Canceling the key lock function
(1) Hold down the and keys together for at least two seconds.