QuickSpecs
Unit Environment and Operating
Conditions
Microtower
Small Form Factor
General Unit Operating Guidelines
Keep the computer away from excessive moisture, direct moisture and the extremes of heat and cold, to ensure that unit is
operated within the specified operating range.
Leave a 10.2 cm (4 in) clearance on all vented sides of the computer to permit the required airflow.
Never restrict airflow into the computer by blocking any vents or air intakes.
Do not stack computers on top of each other or place computers so near each other that they are subject to each other's re-
circulated or preheated air.
Occasionally clean the air vents on the front, back, and any other vented side of the computer. Lint, dust and other foreign
matter can block the vents and limit the airflow.
If the computer is to be operated within a separate enclosure, intake and exhaust ventilation must be provided on the enclosure,
and the same operating guidelines listed above will still apply.
Temperature Range
Operating: 50° to 95° F (10° to 35° C)*
Non-operating: -22° to 140° F(-30° to 60° C)
Relative Humidity
Operating: 10% to 90% (non-condensing at ambient)
Non-operating: 5% to 95% (non-condensing at ambient)
Maximum Altitude
(unpressurized)
Operating: 10,000 ft (3048 m)
Non-operating: 30,000 ft (9144 m)
*
NOTE:
Operating temperature is de-rated 1.0 deg C per 300 m (1000 ft) to 3000 m (10,000 ft) above sea level, no direct sustained
sunlight. Maximum rate of change is 10 deg C/Hr. The upper limit may be limited by the type and number of options installed.
Microtower
Small Form Factor
Power Supply
300-watt BTX power
supply – Passive PFC
115v/230v line
switch
300-watt 85%
efficient* BTX power
supply – Active PFC
240-watt BTX power
supply – Active PFC
115v/230v line
switch
240-watt 85%
efficient* BTX power
supply – Active PFC
Operating Voltage Range
90 to 132VAC, or 180
to 264VAC
90 to 264VAC
90 to 132VAC, or 180
to 264VAC
90 to 264VAC
Rated Voltage Range
100 to 127VAC, or
200 to 240VAC
100 to 240VAC
100 to 127VAC, or
200 to 240VAC
100 to 240VAC
Rated Line Frequency
50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz
Operating Line Frequency Range
47–63 Hz 47–63 Hz 47–63 Hz 47–63 Hz
Rated Input Current
8A/4A
5A/2.5A
6A/3A
3.5A/1.75
Heat Dissipation
Typical 315 btu/hr
(79 kg-cal/hr)
Maximum 1575
btu/hr
(397 kg-cal/hr)
Typical 270 btu/hr
(68 kg-cal/hr)
Maximum 1280
btu/hr
(322 kg-cal/hr)
Typical 315 btu/hr
(79 kg-cal/hr)
Maximum
1260 btu/hr
(317 kg-cal/hr)
Typical 270 btu/hr
(68 kg-cal/hr)
Maximum 1025
btu/hr
(258 kg-cal/hr)
Power Supply Fan
Variable speed fan Variable speed fan Variable speed fan Variable speed fan
ENERGY STAR Compliant
X X
FEMP Standby Power Compliant
(<2W in S5 – Power Off)**
X X X X
QuickSpecs
HP Compaq dc5850 Business PC
Technical Specifications
DA - 12900 EMEA — Version 23 — August 21, 2009
Page 18