The past 18months has seen a significant growth in the theft of survey instruments, particularly unattended Total-Stations. The TSA LinkedIn group has been very successful in highlighting thefts and methods to avoid such situations. http://www.linkedin.com/groupItem?view=&gid=2300386&type=member&item=132438482&qid=e7dcdee4-6317-4333-86b2-f7949bbfd689&trk=group_most_popular-0-b-ttl&goback=%2Egmp_2300386 For inner-city work, or urban sites without perimeter hoarding, SCCS advise the use of security PIN codes for kit. For TPS1200+ “Enter Security PIN Code” is automatically displayed during the instrument start up. PIN Code = A Personal Identification Number protection can be activated. Select Main Menu: Config...General Settings...Start Up & Power Down. PIN protection active Instrument prompts for PIN code entry after starting up when changing the PIN code in CONFIGURE Start Up & Power Down. PIN code generation By the user. Attempts for correct PIN code Five. After five false attempts, a Personal UnblocKing code must be typed in. PUK code generation By Leica Geosystems. For instruments delivered with firmware version 2.10 or higher, the PUK code comes with the instrument. For instruments delivered with firmware versions lower than v2.10, contact a Leica representative to obtain a PUK code. If you enter the wrong PIN code five times, you will be asked to enter a “Security PUK Code”; this is only supplied by authorized Leica dealers. System Viva Main Menu: UserSystem settingsSmartWorx options.