Dell PowerEdge R520 Owner's Manual page 120

Environmental
Temperature Ranges (for altitude less than 950 m or 3117
ft)
Humidity Percentage Range
Relative Humidity
Storage
Maximum Vibration
Operating
Storage
Maximum Shock
Operating
Storage
Maximum Altitude
Operating
Storage
Operating Altitude De-rating
Up to 35 °C (95 °F)
35 °C to 40 °C (95 °F to 104 °F)
40 °C to 45 °C (104 °F to 113 °F)
Particulate Contamination
NOTE: This section defines the limits to help avoid IT equipment damage and/or failure from particulates and
gaseous contamination. If it is determined that levels of particulates or gaseous pollution are beyond the limits
specified below and are the reason for the damage and/or failures to your equipment, it may be necessary for you
to re-mediate the environmental conditions that are causing the damage and/or failures. Re-mediation of
environmental conditions will be the responsibility of the customer.
Air Filtration
NOTE: Applies to data center environments only. Air
filtration requirements do not apply to IT equipment
designed to be used outside a data center, in
environments such as an office or factory floor.
120
10 °C to 35 °C (50 °F to 95 °F) with no direct sunlight on
the equipment.
10% to 80% Relative Humidity with 26 °C (78.8 °F)
maximum dew point.
5% to 95% RH with 33 °C (91 °F) maximum dew point.
Atmosphere must be non-condensing at all times.
0.26 G at 5 Hz to 350 Hz (all operation orientations).
rms
1.87 G at 10 Hz to 500 Hz for 15 min (all six sides
rms
tested).
One shock pulse in the positive z axis of 31 G for 2.6 ms
in all operational orientations.
Six consecutively executed shock pulses in the
positive and negative x, y, and z axes (one pulse on
each side of the system) of 71 G for up to 2 ms.
3048 m (10,000 ft).
12,000 m (39,370 ft).
Maximum temperature is reduced by 1 °C/300 m (1
°F/547 ft) above 950 m (3,117 ft).
Maximum temperature is reduced by 1 °C/175 m (1
°F/319 ft) above 950 m (3,117 ft).
Maximum temperature is reduced by 1 °C/125 m (1
°F/228 ft) above 950 m (3,117 ft).
Data center air filtration as defined by ISO Class 8 per
ISO 14644-1 with a 95% upper confidence limit.
NOTE: Air entering the data center must have
MERV11 or MERV13 filtration.