Thermal Considerations
Sargas User Guide
49
Thermal Considerations
When transmitting at its highest RF power levels, the enclosure temperature of the
Sargas reader will rise just over 20 degrees C above the ambient temperature. Industry
guidelines do not consider any surfaces whose temperature is above 70 C to be safe to
touch. If the Sargas reader is operated in free space, or mounted to a material that is not
thermally conductive, it should not be operated in an ambient temperature greater than 48
degrees C.
To operate the Sargas reader in environments where the ambient temperature is higher
than this (up to the maximum specified operating temperature of +60 C), the reader must
be mounted to a surface which can limit its temperature rise above ambient to 10 degrees
C. If no large thermally conductive surface is available, the Sargas reader will need to be
mounted to a heat sink. Heat sinks are rated in degrees C rise in temperature per Watt of
power dissipated (“thermal resistance”). We recommend a heat sink rated for no greater
than a 10 degree temperature rise for 8 Watts of power dissipation. In testing, we used a
high fin-density heat sink with the following specifications (the top heat sink shown in
Figure 10
):
Base Width: 7.4 inches (187.5 mm)
Length: 3.0 inches (76.2 mm)
Height: 3.1 inches (78.9 mm)
Thermal resistance with natural convection: 0.38
Figure 10:
Typical Heat Sinks
Содержание Sargas
Страница 1: ...1 Sargas User Guide For firmware version 5 1 2 and later 109561 RevE...
Страница 18: ...Setting Up the Reader Sargas User Guide 18 Figure 3 Local Area Connection Status Window...
Страница 62: ...Appendix B Sargas Dimensions Sargas User Guide 62 Appendix B Sargas Dimensions Figure 11 Sargas Dimension...
