The intent of this report is to provide our customers with data that substantiates the calculated long-term reliability of the products manufactured by UltraVolt, Inc.

An MTBF analysis of the "-F" Option for a power supply has been performed by taking the sum of the reciprocals of each of the power supply’s MTBF’s at similar conditions.

Calculations were done on nine environments; ground benign, fixed and mobile at 3 temperatures, 21°, 55°, and 65°C and are summarized as follows:

Temp 21°C 55°C 65°C 21°C 55°C 65°C 21°C 55°C 65°C

Environment Ground Benign Ground Benign Ground Benign Ground Fixed Ground Fixed Ground Fixed Ground Mobile Ground Mobile Ground Mobile

Calculated MTBF (in hours) 32,909,987 14,141,144 10,988,105 6,046,077 2,114,012 1,564,311 1,970,274 799,757 612,843

This report is issued for general sales use and has been edited to maintain UltraVolt's corporate policy on confidential information. Full reports are maintained at UltraVolt in the Quality files.