Force Computers SYS68K/CPU-40, User Manual

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SECTION 2 INSTALLATION
3-1
3. ENVIRONMENTAL REQUIREMENTS
This board was specified and tested for reliable operation under certain environmental conditions. Based
on our performance tests, this board is capable of operating within the temperature range of 0 C to 50 C
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when used inside of a FORCE TARGET-32 chassis. The following chart details the calculated rate of
forced air cooling.
Rate of Forced Air Cooling
Air Cooling per Board Total Air Cooling - Target-32
5.5 CFM* = 0.0026 cubic meter/sec 131 CFM = 0.062 cubic meter/sec
275 LFM** = 1.4 meter/sec 275 LFM = 1.4 meter/sec
* CFM = Cubic Feet per Minute ** LFM = Linear Feet per Minute
The TARGET-32 chassis performs forced air cooling using four axial fans. The amount of airflow needed
for cooling and normal operation is reflected by certain factors such as ambient temperature, number and
location of boards in the system, and outside heat sources. Sufficient air cooling is normally obtained when
5.5 CFM and 275 LFM is circulating around each board at an ambient temperature between 0 C and 50 C.
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Allowable storage temperatures may range between -40 C and 85 C. The rate of relative humidity (non-
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condensing) should not be less than 5%, and should not exceed 95%. The following illustration is a pictorial
view of the fan placement in the chassis.