In 1999, Digisonics distributed Release 9.1 of OB-500 to address Year 2000 compliance issues. Release 8.3 and lower are not compliant under the conditions listed below. Year must be entered as 4 digits for any date not in the same century as the CPU system clock.
All operations are correct if dates are in the same century.
The program does not recognize 2000 as a leap year. GA is correctly calculated from measurements in all situations.