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Adjustments
The CS2 has five potentiometers (pots): LED Time, Overall Gain, Sense Match, Base Threshold, and Sense Threshold. The
LED time adjustment is not used for basic operation; contact Delta for more information
LED's
Trim Pots
LED's
The procedure below is for applications where the background (with no object present) is dark compared to the objects to be
viewed and the features to be identified are relatively dark (in the Sense color spectrum) compared to the object. Examples
include green areas on carrots, knots on wood and burned cookies.
Gains and Thresholds
1.
Mount and wire the unit and connect power. The lighting LEDs on the bottom of the CS2 and the Data Ready indicator
should come on when power is applied. The output bar graph display may or may not be lit.
2.
Find a sample object with the greatest reflectance (biggest and lightest). Put it in the viewing area and adjust the Overall
Gain until the less intense bar graph indicator is in the 8th or 9th position (red).
Bright bar indicates Sense Color
3.
Adjust the Sense Match pot until the bright bar graph indicator is on top of the less intense bar graph indicator (8th or 9th
position).
4.
Put an average object in the viewing area. Both base color and sense color bar graph indicators should be within the
center of the display (green).
5.
Remove all objects. Reflected light from background should display no higher than the second bar graph indicator
(yellow).
6.
Place an average size and color object in the viewing area for about ten seconds. Remove all objects and then
immediately put a minimum size, normal color object in the viewing area. Adjust the Base Threshold pot such that the
Base Limit indicator is just activated.
7.
Put a marginally nominal object in the viewing area (make sure the low/high ratio limit configuration jumper setting is
correct). Adjust the Sense Threshold pot such that the sense limit indicator is just activated.
8.
Fine tune both threshold adjustments while observing on-line operations.
Delta Computer Systems, Inc., 11719 NE 95th Street, Vancouver, Washington 98682-2444 (360) 254-8688
Output
Bar Graph
Data Ready
Trig In
TB2
Base Limit
TB1
Sense Limit
Status
Status Indicators
Indicators
Output Bar Graph Display
Green
Yellow
email@deltacompsys.com http://www.deltacompsys.com
CS2 Color Scanner
Base Limit Threshold
Overall Gain
Led Time
Sense Match
Sense Limit Threshold
Less intense bar indicates Base Color
Red
Yellow
Red
Green
Output Bar Graph
Display
9
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