User's Manual
1 - 12 MC18 Product Reference Guide
Data Capturing
The MC18 uses a imager to allow collection of data by scanning bar codes.
The scanner has the following features:
•
Reads a variety of bar code symbologies, including the most popular linear, postal, and 2-D code types
(see Appendix , Technical Specifications).
•
Contains advanced intuitive aiming light for easy point-and-shoot operation.
Scanning Considerations
Typically, scanning is a simple matter of aim, scan/decode and a few quick trial efforts master it. However, two
important considerations can be used to optimize any scanning performance:
•
Range
Any scanning device decodes well over a particular working range — minimum and maximum distances
from the bar code. This range varies according to bar code density and scanning device optics.
Scanning within range brings quick and constant decodes; scanning too close or too far away prevents
decodes. Move the MC18 closer and further away to find the right working range for the bar codes being
scanned. However, the situation is complicated by the availability of various integrated scanning modules.
The best way to specify the appropriate working range per bar code density is through a chart called a
decode zone for each scan module. A decode zone simply plots working range as a function of minimum
element widths of bar code symbols.
•
Angle
Don’t scan at too sharp an angle; the scanner needs to collect scattered reflections from the scan to make
a successful decode. Practice quickly shows what tolerances to work within.
Scanning Bar Codes
1. Ensure that a scan enabled application (for example: Scanning Sample) is loaded and enabled on the
MC18.
2. From the App Launcher screen, touch Demo Applications > Scanning Sample.
3. Aim the scan exit window at the bar code.
4. Press the scan key.
Ensure the red aiming dot is at the center of the bar code. The LED changes from red to green and audible
beep sounds if bar code was decoded successfully.
Figure 1-10
Imager Aiming Pattern
NOTE Contact the Symbol Technologies Global Customer Support if chronic scanning difficulties develop.
Decoding of properly printed bar codes should be quick and effortless.
Wrong
Right
Red Illumination Light
Red Aiming Dot