LXE VX4, Руководство пользователя

Страница: 60 / 86

52 Enter Data
VX4 User’s Guide E-EQ-VX4OGWW-H-ARC
Scanner Entry
The following section is directed toward a generic tethered scanner connected to the COM1 serial
port on the VX4.
Aiming the Barcode Scanner
Aim the scanner
away
from you, direct it at the barcode and press the trigger to scan.
The Scan On LED (or equivalent) turns red to indicate the scanner is on.
Adjust the aim so that the thin, red laser beam covers the entire length of the barcode.
Some scanners use a laser aiming beam which then spreads into a wide beam when the scanner’s
Aiming Beam Timer expires. Place the aiming beam in the center of the barcode and hold the
scanner steady until the beam spreads and the barcode is decoded. Beeps may be heard as the
barcode is decoded. Refer to the barcode scanner user’s guide for information on the Aiming
Beam Timer and beep sequences, and the TE reference guide for host generated beep sequences.
The scan beam must cross every bar and space on the barcode.
Correct Scan Incorrect Scan Incorrect Scan
Figure 45 Scan Beam
Distance from Label
Large barcodes can be scanned at the maximum distance. Hold the scanner closer to small
barcodes (or with bars that are very close together).
Note: Do not position the scanner exactly perpendicular to the barcode being scanned. In this
position, light can bounce back into the scanner’s exit window, and possibly prevent a
successful decode.
Successful Scan
When the scan is successful, the scanner’s good scan indicator illuminates, the scan on indicator is
off, and the currently running application may produce a distinctive audible tone.
Unsuccessful Scan
When the scan is unsuccessful, the scan on indicator remains illuminated and the currently
running application may produce distinctive audible tones. Check the following:
•
Is the scanner programmed for the barcode being read?
•
Check the barcode for marks or physical damage e.g. ripped label, missing section,
etc.
•
Try scanning test symbols of the same code type at different distances and angles.