Keithley Instruments
Model 4299-4 Dual-Unit
2
Hinge
2602-328
2
Front rack-ear
2602-355
1
Quick-release pin
FA-352
4
Cage nut
FA-274
4
#8-32 × 3/8 in. Phillips pan-head screw
8-32×3/8PPH
4
#8-32 × 3/8 in. Phillips flat-head screw
8-32×3/8PFH
4
#10-32 × 5/8 in. Phillips truss-head screw
10-32×5/8PHTRSH
2
M4 × 12 mm Phillips pan-head screw
M4×12PPH
4
M4 × 12 mm Phillips flat-head screw
M4×12MMPFH
28775 Aurora Road
Cleveland, Ohio 44139
1-800-833-9200
tek.com/keithley
Rack-Mount Kit Installation Instructions
Introduction
The Model 4299-4 Dual-Unit Rack-Mount Kit contains all of the hardware to mount two half-rack instruments in
a standard 48.3 cm (19 in.) rack (either a Keithley Instrument or Keysight unit).
Parts list
Refer to the table below for a list of parts included in the kit.
Quantity Description Keithley part number
Tools required
Medium (#2) Phillips screwdriver
3/8-inch wrench
Flat-bladed screwdriver or cage-nut installation tool
Installation overview
Review the Installation precautions (on page 2).
Select a location in the rack:
a. Clear as much space as possible around the selected rack location.
b. Remove the cabinet side panels from the rack.
Prepare the instrument (on page 2
Install mounting hardware (on page 4).
Prepare the rack (on page 6).
Install the instruments (on page 6) in the rack.
).
PA-943 Rev. C April 2021 *PPA-943C* 1
Model 4299-4 Dual-Unit Rack-Mount Kit Installation Instructions
Installation precautions
Observe the following safety precautions while installing instruments.
Turn off instrument power and unplug all cables before installing an instrument in a rack.
Failure to remove power before installation may cause personal injury or death from
electrical shock.
Heat sources should be mounted away from the instrument, cabling, and accessories, with
sufficient space provided between the instrument and heat source for airflow and cooling.
To prevent damaging heat build-up and ensure specified performance, make sure there is adequate
ventilation and airflow around the instrument to ensure proper cooling. Do not cover the ventilation
holes on the sides or back of the instrument. The rear vents and both side vents must be
unobstructed to properly dissipate heat.
Mount precision equipment as low as possible in the rack. Operating temperatures are cooler lower
in the rack.
Prepare the instrument
To remove the handle, mounting ears, and rear feet:
1. Gently pull the handle (1) away from the sides of the instrument case and swing it up or down until the
orientation arrows on the handles line up with the orientation arrows on the mounting ears, as shown in the
following figure.
Figure 1: Rack-mount kit handle removal
2 PA-943 Rev. C April 2021
Model 4299-4 Dual-Unit Rack-Mount Kit Installation Instructions
2. After you align the arrows (2), pull the ends of the handle (1) away from the case.
3. Remove the screw that secures each mounting ear (3).
4. Pull down and out to remove each ear.
Figure 2: Mounting ear removal
5. From the bottom of the instrument, pull out the rubber feet and remove the screws (4), see the following
figure.
Figure 3: Instrument rubber feet removal
6. Store the handle, rubber feet, and hardware for future use.
PA-943 Rev. C April 2021 3
Loading...