Leica GPS1200 Series Technical Reference Manual page 457

Config...\General Settings...
Description of fields
Field Option
Use PIN Yes or No
New PIN User input
PIN Code User input
Change PIN Yes or No
Description
Activates the PIN code protection. This setting is not
part of the configuration set.
The PIN code must be a number with four to six
digits.
The PIN code as previously defined on this page. The
correct PIN code must be typed in within five
attempts or the PUK code is required. Refer to "5
Receiver Protection with PIN".
Activates <New PIN:> to type in a new PIN code.
GPS1200 457