Processors - Dell PowerEdge M420 Technical Manual

For additional information about environmental measurements for specific system configurations,
see Dell.com/environmental_datasheets. Table 23 details the environmental specifications for the
M420.
Fresh Air: temperature, humidity, altitude de-rating
Continuous 10°C to 35°C (50°F to 95°F) at 10% to 80% relative humidity with 26°C (78.8°F) maximum
operation dew point (maximum wet bulb temperature). De-rate maximum allowable dry bulb
temperature at 1°C per 300m above 950m (1°F per 547 ft above 3117 ft).
Expanded When operating in the expanded temperature range, system performance may be impacted,
operation and ambient temperature warnings may be reported on the LCD and in the System Event
Log.
≤ 10% of annual operating hours: 5°C to 10°C and 35°C to 40°C (with no direct sunlight on
the equipment) at 5% to 85% relative humidity with 26°C dew point (maximum wet bulb
temperature). Outside the standard operating temperature (10°C to 35°C), the system can
operate down to 5°C or up to 40°C for a maximum of 10% of its annual operating hours. For
temperatures between 35°C and 40°C (95°F to 104°F), de-rate maximum allowable dry bulb
temperature by 1°C per 175m above 950m (1°F per 319 ft above 3117 ft).
≤ 1% of annual operating hours: –5°C to 5°C and 40°C to 45°C (with no direct sunlight on
the equipment) at 5% to 90% relative humidity with 26°C dew point (maximum wet bulb
temperature). Outside the standard operating temperature (10°C to 35°C), the system can
operate down to –5°C or up to 45°C for a maximum of 1% of its annual operating hours. For
temperatures between 40°C and 45°C (104°F to 113°F), de-rate maximum allowable dry bulb
temperature by 1°C per 125m above 950m (1°F per 228 ft above 3117 ft).
Expanded operation restrictions:

No cold startup below 5°C

Single-processor configuration required
Temperature
Operating See Fresh Air for temperature information
o
Storage –40 C to 65
Relative humidity
Operating See Fresh Air for relative humidity information
Storage 5% to 95% at a maximum wet bulb temperature of 33°C (91°F); atmosphere must be
condensing at all times
Maximum vibration
Operating 0.26 Grms at 5Hz to 350Hz for 15 minutes
Storage 1.54 Grms at 10Hz to 250Hz for 15 minutes
Maximum shock
Operating One shock pulse in the positive z axis (one pulse on each side of the system) of 31G for up
to 2.6ms
Storage Six consecutively executed shock pulses in the positive and negative x, y, and z axes (one
pulse on each side of the system) of 71G for up to 2ms
PowerEdge M420 Technical Guide
41
o o o
C (-40 F to 149 F) with a maximum temperature gradation of 20
o
C per hour