Spec Sheet

V430-F
13
Readability Tables
The readability tables on the following pages are designed to help users choose the best read-distance, sensor, and
lens combination to read their particular code size and code type successfully.
The readability tables show the calculated PPE (pixels per element) for a range of typical code sizes at all the
MicroHAWK Fixed Focus distances with the Wide, Medium, Narrow, and Long Range lens as well as with the
0.3MP, 1.2MP, and 5MP sensors.
PPE is defined as the following for 1D and 2D codes:
• PPE for 1D codes is the number of pixels across the thinnest bar in the barcode.
• PPE for 2D codes is the number of pixels across a single code cell.
The tables show a color code for readability based on Direct Part Marks (DPM) where red means not likely to read, and
green means that it should read. The tables also show a range of colors between red and green, while showing the
zone where read rates may be acceptable for high-contrast, well-printed labels and can be considered. See the 1D and
2D Code Readability Guidelines below for Minimum and Preferred PPE for both DPM marks and high-contrast labels.
High-Contrast Labels
• 1.5 pixels per thin bar is suggested minimum;
• 2 pixels or more per thin bar is preferred.
Direct Part Marks
• 2 pixels per thin bar is suggested minimum;
• 2.5 pixels or more per thin bar is preferred.
High-Contrast Labels
• 2.5 – 2.75 pixels per 2D cell is suggested minimum;
• 3.5 – 5 pixels per 2D cell is preferred.
Direct Part Marks
• 3.25 pixels per 2D Cell is suggested minimum;
• 4 – 6 pixels per 2D Cell is preferred.
1D Code Readability Guidelines
2D Code Readability Guidelines