Keithley 4299-3 Installation Instructions Manual

Model 4299-3

Keithley Instruments, Inc.

28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
www.keithley.com

Universal Single Unit Rack Mount Kit

Introduction

This instruction sheet contains a parts list and installation information for the Model 4299-3 Universal Single Unit
Rack Mount Kit. This kit includes all hardware necessary to mount one half-rack instrument (either Keithley, or
Agilent unit) excluding the 260x or other products that are designated to use the rear support feature in a standard
19-inch rack.

Parts list

Table 1 lists the parts supplied with the Model 4299-3 Single Unit Universal Rack Mount Kit4299-1 parts list
4266-1 parts list

Quantity Description Keithley Part Number

1
6
1
4
6
1
4

Front Rack Ear
Cage Nut
"DO NOT DISCARD" Label
#8-32 X 3/8 LG Phillips Pan Head Screw
#10-32 X 5/8 LG Phillips Truss Head Screw
Half Rack Front Panel
M4X12 Phillips Pan Head Screw

2602-333
FA-274
MC-345
8-32X3/8PPH
10-32X5/8PHTRSH
2602-344
M4X12PPH

PA-942 Rev. A / May 2007 1

Model 4299-3 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 • Place the hottest equipment (for example, the power supply), at the top of

the rack

• Place precision equipment as low as possible in the rack (where
temperatures are cooler)

• Follow instructions included with Keithley equipment for rack mounting.

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”).

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.

1. Remove the handle —The handle serves as an adjustable tilt-bail. Adjust its position by gently pulling it
away from the sides of the instrument case and swinging it up or down. To remove the handle, swing the
handle below the bottom surface of the case and back until the orientation arrows on the handles line up
with the orientation arrows on the mounting ears (refer to Figure 1). With the arrows lined up, pull the ends
of the handle away from the case.

2. Remove mounting ears.

• Remove the screw that secures each mounting ear.

• Pull down and out to remove each ear.

2 PA-942 Rev. A / May 2007