Cisco Systems 3120 manual Temperature, Humidity, Altitude

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Chapter 5 Maintaining Your AVS 3120

Maintaining Your Site Environment

Temperature

Temperature extremes can cause a variety of problems, including premature aging and failure of chips or mechanical failure of devices. Extreme temperature fluctuations can cause chips to become loose in their sockets.

To minimize the negative effects of temperature on AVS 3120 performance, follow these guidelines:

Ensure that the AVS 3120 operates in an environment no colder than 32°F (0°C) or hotter than 104°F (40°C).

Ensure that the AVS 3120 has adequate ventilation. Do not place it within a closed-in wall unit or on top of cloth, which can act as insulation. Do not place it in direct sunlight. Do not place it next to a heat source of any kind, including heating vents during winter.

Adequate ventilation is particularly important at high altitudes. AVS 3120 performance may not be optimum when operating at high temperatures as well as high altitudes.

Ensure that all slots and openings on the AVS 3120 remain unobstructed, especially the fan vent on the back of the AVS 3120.

Clean the AVS 3120 at regular intervals to avoid any buildup of dust and debris, which can cause it to overheat.

If the AVS 3120 has been exposed to abnormally cold temperatures, allow a 2-hour warm-up period to bring it up to normal operating temperature before turning it on. Failure to do so may cause damage to internal components.

Humidity

High-humidity conditions can cause moisture in the AVS 3120. This moisture can cause corrosion of internal components and degradation of properties, such as electrical resistance, thermal conductivity, physical strength, and size. Extreme moisture buildup inside the AVS 3120 can result in electrical shorts, which can cause serious damage.

Each AVS 3120 is rated to operate at 8 to 80 percent relative humidity, with a humidity gradation of 10 percent per hour. Buildings in which climate is controlled by air conditioning in the warmer months and by heat during the colder months usually maintain an acceptable level of humidity for the AVS 3120.

However, if an AVS 3120 is located in an unusually humid location, use a dehumidifier to maintain the humidity within an acceptable range.

Altitude

Operating an AVS 3120 at high altitude (low pressure) reduces the efficiency of forced and convection cooling and can result in electrical problems related to arcing and corona effects. This condition can also cause sealed components with internal pressure, such as electrolytic capacitors, to fail or perform at reduced efficiency.

The AVS 3120 is for use at a maximum altitude of 9843 feet (3000 meters).

Cisco AVS 3120 Application Velocity System Hardware Installation Guide

5-2

OL-11805-01

 

 

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Contents Corporate Headquarters Text Part Number OL-11805-01Page N T E N T S Removing or Replacing an AVS 3120 Altitude OL-11805-01 Preface AudienceChapter/Appendix Description OrganizationRelated Documentation Conventions Bewaar Deze InstructiesWarnung Wichtige Sicherheitshinweise Avvertenza Importanti Istruzioni Sulla SicurezzaAviso Instruções Importantes DE Segurança Guarde Estas InstruçõesGEM Disse Anvisninger Xiii Product Documentation DVD Obtaining DocumentationCisco.com Ordering Documentation Documentation FeedbackCisco Product Security Overview Reporting Security Problems in Cisco Products Product Alerts and Field NoticesObtaining Technical Assistance Cisco Technical Support & Documentation WebsiteObtaining Additional Publications and Information Submitting a Service RequestDefinitions of Service Request Severity Xix OL-11805-01 Product Overview IntroductionSystem Hardware Features Front Panel FeaturesPorts and Connectors Rear Panel FeaturesEthernet Connectors Indicator Color DescriptionRJ-45 Cables Console Port Pin Signal DefinitionParameter Setting Signal RJ-45 Pin DB-9 /DB-25 Pin RJ-45 to DB-9 or DB-25 AdapterOL-11805-01 Preparing for Installation SafetyPreparing for Installation Safety Page General Precautions Maintaining Safety with ElectricityProtecting Against Electrostatic Discharge Preparing Your Site for Installation Copper foilChoosing a Site for Installation Environmental RequirementsEnsuring Overcurrent Protection Grounding the AVSAC Power Requirements Power Supply GuidelinesCreating a Safe Environment CablingPrecautions for Rack-Mounting Required Tools and Equipment Installing the AVS If the Product is Damaged Installing Your AVSUnpacking and Inspecting the AVS Attaching a Two-Post Rack Bracket to the AVS Attaching the Brackets to the Sides of the AVS Installing the AVS 3120 on a Workbench or Tabletop Installing the AVS 3120 in a Two-Post RackConnecting Cables Connecting AC Power Console ConnectionBooting the AVS Booting with a Console ConnectedEstablishing a Serial Console Connection Configuring Network Settings Velocityshow interfaceYou can view the DNS settings by using the show dns command Setting the Time Indicator Color State Indicates Checking the Front Panel LEDsRemoving or Replacing an AVS Troubleshooting the AVS 3120 Hardware Checking the BasicsChecking Connections Maintaining Your AVS Maintaining Your Site EnvironmentAltitude TemperatureHumidity Dust and Particles CorrosionElectrostatic Discharge Electromagnetic and Radio Frequency InterferencePower Source Interruptions Using Power Protection Devices Uninterruptible Power SuppliesSurge Protectors Line ConditionersOL-11805-01 Specifications Dimensions and WeightPower EnvironmentOL-11085-01 Open Source License Files Apache LicenseAppendix B Open Source License Files Apache License END of Terms and Conditions OL-11805-01 D E IN-2 IN-3 IN-4
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