HP ProBook 6540b HP ProBook 6545b, 6540b, 6445b and 6440b Notebook PC - Mainte - Page 167
Input power, Temperature, Relative humidity, Maximum altitude, Metric, Maintenance and Service Guide
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Specifications Metric U.S. Input power Operating voltage 18.5 V dc @ 3.5 A - 65 W or 19.0 V dc @ 4.74 A - 90 W Operating current 3.5 A or 4.74 A Temperature Operating (not writing to optical disc) 0°C to 35°C 32°F to 95°F Operating (writing to optical disc) 5°C to 35°C 41°F to 95°F Nonoperating -20°C to 60°C -4°F to 140°F Relative humidity Operating 10% to 90% Nonoperating 5% to 95% Maximum altitude (unpressurized) Operating -15 m to 3,048 m -50 ft to 10,000 ft Nonoperating -15 m to 12,192 m -50 ft to 40,000 ft ✎ Applicable product safety standards specify thermal limits for plastic surfaces. The computer operates well within this range of temperatures. 6-2 Maintenance and Service Guide
6–2
Maintenance and Service Guide
Specifications
Input power
Operating voltage
18.5 V dc @ 3.5 A - 65 W or 19.0 V dc @ 4.74 A - 90 W
Operating current
3.5 A or 4.74 A
Temperature
Operating (not writing to optical disc)
0°C to 35°C
32°F to 95°F
Operating (writing to optical disc)
5°C to 35°C
41°F to 95°F
Nonoperating
-20°C to 60°C
-4°F to 140°F
Relative humidity
Operating
10% to 90%
Nonoperating
5% to 95%
Maximum altitude
(unpressurized)
Operating
-15 m to 3,048 m
-50 ft to 10,000 ft
Nonoperating
-15 m to 12,192 m
-50 ft to 40,000 ft
✎
Applicable product safety standards specify thermal limits for plastic surfaces. The computer operates well within this
range of temperatures.
Metric
U.S.