Calculated Industries 9430 - Manual (Page 22)

User’s Guide — 21
Year
/
To view the year setting, press r
/ . To change, enter a new value
and press s / (default is 2000).
Time and Date Math Rules
There are two kinds of time
values that must be considered:
1. Points in Time (a specific time or date):
9:22 AM, 5 PM
1/15/1997
2. Time Periods (a span of time):
37 Minutes, 45 Seconds
2 Weeks, 3 days
Time and date formats are Hours,
Minutes, Seconds, Years, Months,
Weeks, and Days. When entering time
and date values, the entry must comply
with the following rules:
Addition
Period + Period = Period
Point + Period = Point
Point + Point = Error
Note: You cannot add two points in time as
the result would be meaningless.
Subtraction
Period – Period = Period
Point – Period = Point
Point – Point = Period
Period – Point = Error
Note: When subtracting one point in time
from another, enter the later time first, then
subtract the earlier time.
(Cont’d)