Model 4299-1 Keithley Instruments, Inc. Single Unit Adjustable Heavy-Duty Rack Mount Kit 28775 Aurora Road Cleveland, Ohio 44139 1-888-KEITHLEY www.keithley.com Introduction This instruction sheet contains a parts list and installation information for the Model 4299-1 Single Unit Adjustable Heavy-Duty Rack Mount Kit. This kit includes all hardware necessary to mount one Model 260x SourceMeter Instrument in a standard 19-inch rack. Parts list Table lists the parts supplied with the Model 4299-1 Single Unit Adjustable Heavy-Duty Rack Mount Kit. 4299-1 parts list Quantity Description Keithley Part Number 1 Front Rack Ear 2602-333 1 Rear Rack Mount Bracket 2602-334 1 Rack Mount Extension Arm 2602-335 6 Cage Nut FA-274 1DO NOT DISCAR Label MC-345 4 8-32 X 3/8 LG Phillips Pan Head Screw 8-32X3/8PPH 2 10-32 X 3/8 LG Phillips Pan Head Sems Screw 10-32X3/8PPHSEM 6 10-32 X 5/8 LG Phillips Truss Head Screw 10-32X5/8PHTRSH 1 Half Rack Front Panel 2602-344 PA-908 Rev. B / May 2007 1 Model 4299-1 Installation Instructions Installation The following procedure outlines the installation of the rack mount kit. WARNING Make sure the instrument that is being installed is in a powered down state with all cables unplugged. Failure to install an instrument in a discharged state may cause an electrical shock or death. CAUTION To prevent damaging heat build-up, and thus ensure specified performance, adhere to the following rack-mounting precautions: Keep the rear exhaust vent and at least one side vent free of any obstructions. Even partial blockage may impair proper cooling. DO NOT position a device adjacent to the Model 260x that forces air (heated or unheated) into or onto the Model 260xs cooling vents or surfaces. This additional airflow may compromise accuracy performance. Allow at least 1U of space at the top and bottom of the Model 260x (see Note below). Make sure there is adequate air flow around at least one side of the instrument. Adequate air flow ensures proper cooling. Adequate airflow provides air temperatures that are within about one inch of the Model 260x surfaces to remain within specified limits under all operating conditions. DO NOT rack mount high dissipation equipment adjacent to the Model 260x, which could cause excessive heating to occur. The specified ambient temperature must be maintained around the surfaces of the Model 260x to maintain specified accuracies. Place the hottest equipment (for example, the power supply) at the top of the rack. Place precision equipment (such as the Model 260x) as low as possible in the rack (where temperatures are cooler). Add space panels below the Model 260x to help ensure adequate air flow. NOTE 1U is a standard vertical spacing and is equal to 1.75 inches. Typical distance between the mounting holes on rack rails is 0.125 (1/8). Add vented panel S500-304 (not included) above units and Blanking Panel (PNL-10x) below when installing 26xx. When determining placement within any rack, make sure to adhere to the Caution above. If the rack has only convection cooling, use the following as general guidelines to properly design equipment placement: Step 1. Prepare instrument To prepare the instrument for mounting, remove the handle, the mounting ears, and both rear feet. The following information outlines this process. 2 PA-908 Rev. B / May 2007