2-12
Temperature - The computer cabinet and expansion bay cabinet are air cooled with fans bringing cool
air into the equipment, circulating it, and then exhausting whatever heat is generated into the room. To
ensure that airflow is not impeded, do not place the cabinets closer than three feet to walls or
obstructions.
The computer system operates most reliably if room temperature is maintained between 68 and 77
degrees Fahrenheit (20 and 25 degrees Celsius). Appendix A of this manual contains
computer/expansion bay heat dissipation information to assist you in determining your air
conditioning requirements. Refer to Section 3 of the Computer Products Site Preparation Resource
Guide for additional air conditioning information. The Hewlett-Packard CE can assist you in
determining the heat dissipation of recommended system peripherals.
Humidity - The computer and expansion bay humidity specifications are contained in Appendix B of
this manual. High humidity levels can cause improper feeding and stacking of printer paper and/or
improper system equipment operation. Extremely low humidity levels aggravate problems of static
electricity. Refer to Section 3 of the Computer Products Site Preparation Resource Guide for additional
information.
Electrostatic Discharge
If there is an abnormally high level of static electricity at your computer system’s location (15 KV or
higher), personnel will probably be “sparking” upon contact with the equipment. Carpeting and/or low
humidity will probably be the source of static electricity, especially in dry and cold climates. Static
electricity can often be significantly reduced by using a humidifier. (Hewlett-Packard recommends a
heat evaporating type humidifier and strongly recommends against using a cold water atomizer type
humidifier.
Other ways to minimize electrostatic discharge are by using specially grounded mats in front of the
computer system or by treating carpeting with anti-static spray. Anti-static spray is not recommended
because it finds its way into the system intake filter and tends to coat the circuitry. If spray is used, it
should be applied while the system is turned off. Refer to Section 3 of the Computer Products Site
Preparation Resource Guide for additional information.
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