Table of Contents
Advertisement
2 - 4
SE4750 Integration Guide
Engine Scanning Duty Cycle in Presentation Mode, Chassis Temperature Limit = 60°C
Figure 2-3
Notes:
•
The plot represents the condition that the engine is in still air and with no heat sink attached, while the air
temperature is measured as the ambient temperature.
•
The scanning time is measured between the trigger event (object detection event) and the end of the
scanning session (the bar code leaving the engine FOV).
•
The scanning duty cycle is the percentage of time when the engine is in full presentation scanning mode.
•
0% scanning duty cycle in presentation mode indicates that the engine is in object detection mode.
•
The number of scans per minute is based on the assumption that a typical scanning session requires
1 second of full scanning power. For example, 12 scans per minute equals 20% scanning duty cycle.
Running in continuous 54 fps video mode with both aiming and illumination enabled full time is highly uncommon. If
a higher ambient temperature or higher scan rate is desired, the recommendations to reduce engine power
consumption and increase heat removal include but are not limited to:
•
Turning off the engine aiming and illumination whenever possible.
•
Using the ambient light to assist the scan engine in bar code decoding, thereby reducing the illumination
power consumption.
•
Mounting on a solid metallic surface that facilitates conductive heat transfer and increases the combined
thermal capacitance.
•
Selecting a housing design that allows for natural or forced convection to reduce the convective thermal
resistance between the engine and the ambient.
•
Providing heat sink to the engine to create an alternative heat transfer path to the ambient in parallel to
reducing the overall thermal resistance between the engine and the ambient.
Advertisement
Table of Contents
