Calculated Industries TimeCard Tabulator II Guide de l'utilisateur télécharger pdf (Page 15)

User’s Guide — 11

Time Conventions

When you are dealing with time, there

are actually two kinds of time values

that must be considered:

1. Points in Time: 9:22 AM, 5 PM

2. Time Periods: 37 Minutes,

45 Seconds

The time math rules are as follows:

Addition

Period + Period = Period

3 Hrs. + 22 Min. = 3 HR 22 MIN

Point + Period = Point

9 AM + 22 Min. = 9:22 AM

Point + Point = Error

Note: You cannot add two points in time as

the result would be meaningless.

Subtraction

Period – Period = Period

3 Hrs. – 22 Min. = 2 HR 38 MIN

Point – Period = Point

9 AM – 22 Min. = 8:38 AM

Point – Point = Period

9 AM – 8:30 AM = 30 MIN

Period – Point = Error

Note: When subtracting one point in time

from another, it’s best to enter the “later” time

first, then subtract the earlier time.

(Cont’d)

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Calculated Industries TimeCard Tabulator II Guide de l'utilisateur Page 15