Datalogic matrix 450N, Product Reference Manual

Page: 23 / 192

PRODUCT REFERENCE GUIDE 9
STEP 4 - FOCUS THE READER
Matrix 450N provides a built-in tool called Blue Diamonds™ to aid focusing the reader.
The Blue Diamonds are accessed through the X-PRESS Interface.
1. Remove the lens cover in order to focus the reader.
2. Prepare the correct accessory lens for your application:
NOTE
a. Remove the anti-vibration o-ring from the two Locking Knobs on the lens and
loosen them.
b. Adjust the Focus ring to the “
Far position ” and the Diaphragm ring to the “ F2.8 ”
number setting which is the preferred setting for installation using the X-PRESS
interface.
3. Power the reader on. During the reader startup (reset or restart phase), all the
LEDs blink for one second. On the connector side of the reader near the cable, the
“POWER ON” LED (blue) indicates the reader is correctly powered.
4. Enter the Focus function by pressing and holding the X-PRESS push button until
the Focus LED is on.
5. Release the button to enter the Focus function. The Blue Diamonds turn on.
Figure 7 - X-PRESS Interface: Focus Function
NOTE
The procedure is as follows:
a. At the correct reading distance (see the Reading Diagrams in
Chapter 6, Reading
Features ), adjust the Focus ring towards the “Near position” until the Blue Dia-
monds are perfectly in focus, see Figure 8.
b. At long focal distances, a “skew” angle may cause a noticeable difference in
focus between the two diamonds, in this case select the best possible focus (both
diamonds slightly out of focus). Tighten the Diaphragm Locking Knob.
Once the lens is fully tightened to the mechanical stop (Step 1), it can be
rotated counterclockwise (up to one full turn without loosening the
lens), so that the diaphragm scale and locking knobs can be easily
accessed from behind the LT-03x.
If the reading surface is too dark, in order to increase the contrast, it
may be helpful to place a piece of white paper at the Blue Diamonds
positions to see them better.