It's very important to have the correct date and time set for your hand held scanner.
Print out these two pages, you'll need them to program your scanner.
Scan the Set Date bar code on page 3-5, then scan six numeric digits in the format mmddyy from Numeric Bar Codes for Date and Time Settings on page 3-6 (first two for the month, second two for the day, third two for the year).
For example if today is June 5th 2012
Scan these barcode numbers; 0, 6, 0, 5, 1, 2.
(you don't need to scan the "enter" bar code)
Scan the Set Time bar code, then scan four numeric digits in the format hhmm from Numeric Bar Codes for Date and Time Settings on page 3-6 representing the time according to the 24 hour clock (first two for the hour, second two for the minute).
For example, to set the time to 8:45 in the morning, scan the following bar codes, 0, 8, 4, 5.
To set the time to 3:07 in the afternoon, scan 1, 5, 0, 7.