iStarUSA TC-1U30FX2 Manual Do Utilizador
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11
4.2 Environmental
4.2.1 Environmental (Operating)
Temperature: 0℃ to 40℃
Humidity: 20% to 80% Relative Humidity (non condensing)
Altitude: -61meters to +3,048 meters
Shock: T.B.S.
Vibration: T.B.S.
4.2.2 Environmental (Non-Operating)
Temperature: -25℃ to 85℃
Humidity: 10% to 90% Relative Humidity (non condensing)
Altitude: -61meters to +15,244 meters
Shock: T.B.S.
Vibration: T.B.S.
4.3
Fan Control Function ( Optional )
In order to prolong the fan’s life cycle, the power supply is facilitated with a
thermostatic circuitry to monitor the fan speed under the power supply
operating temperature.
4.4 Reliability
/
MTBF
The power supply reliability is based on the calculation with the Part-Stress Analysis
method of MIL-HDBK-217F using the quality factors listed in
MIL-HDBK-217F. The power supply MTBF is 250,000 hours under the
following conditions:
-
Full-rated load
-
120VAC input
-
Ground begin
-
25℃ ambient
4.5 MTBF
MTBF (mean time between failures) calculation
The demonstrated MTBF shall be 100,000 hours of continuous operation at 25
o
C,full load,
80% confidence limit and nominal line. The MTBF of the power supply be calculated in
accordance with MIL-HDBK-217F. The DC FAN is not included.