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To use the operator accounts you must activate the mode. Device will ask you to select user
name you want to use. By returning to the Main Menu, you will see the name of the operator
in use. By clicking on the arrow below the name of the operator, you can switch off the FIRST
or change operator.
If the instrument is switched off while operator mode is activated, device will ask you to select
the operator you want use then it will be switched ON.