Model 4299-4
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
www.keithley.com
Universal Dual Unit Rack Mount Kit
Introduction
This instruction sheet contains the parts list and installation information for the Keithley Instruments Model
4299-3 Universal Dual Unit Rack Mount Kit. This kit includes all hardware necessary to mount two half-rack
instruments (either a Keithley Instruments or Agilent unit), excluding the Keithley Instruments Series 2600 or
other products that are designed to use the rear-support feature in a standard 19-inch rack.
Parts list
Table 1 lists the parts supplied with the Model 4299-4 Universal Dual Unit Rack Mount Kit.
Table 1
Model 4299-4 part listing
Quantity Description Keithley Instruments part number
2
2
1
4
1
4
4
4
4
4
Hinge
Front rack ear
Modified quick-release pin
Cage nut
"DO NOT DISCARD" label
#8-32 x 3/8 LG Phillips pan-head screw
#8-32 x 3/8 LG Phillips flat-head screw
#10-32 x 5/8 LG Phillips truss-head screw
M4 x 12 Phillips pan-head screw
M4 x 12 Phillips flat-head screw
2602-328
2602-355
FA-352
FA-274
MC-345
8-32X3/8PPH
8-32X3/8PFH
10-32X5/8PHTRSH
M4X12PPH
M4X12MMPFH
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 Instruments equipment for rack mounting.
PA-943 Rev. B / February 2008 1
Model 4299-4 Universal Dual Unit Rack Mount Kit Installation Instructions
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 inches (1/8 inch).
Step 1: Prepare the 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 (see Figure 1). With the arrows aligned, pull the ends of the handle
away from the case.
Figure 1
Remove handle and mounting ears
Mounting ear
Handle
Mounting ear
Screw
2. Remove mounting ears.
• Remove the screw that secures each mounting ear.
• Pull down and out to remove each ear.
3. Remove both rear feet from the instrument by pulling out the rubber feet and then removing the screws
underneath.
NOTE: Do not reinstall the feet mounting screws. Save all parts removed for future bench-top
use of the instrument.
2 PA-943 Rev. B / February 2008
Model 4299-4 Universal Dual Unit Rack Mount Kit Installation Instructions
Step 2: Install mounting hardware on instrument
NOTE The instrument may be installed on the rack’s right side with the half-rack front panel
on the left side, as shown in the following illustrations, or on the rack’s left side with
the half-rack front panel on the right side (not shown).
1. Determine and select the unit’s side that is to be installed closest to the rack rail (see note above).
2. Place the instruments side-by-side as they will be installed in the rack (see Figure 2).
3. Secure front rack ear (2602-355) using two pan-head screws (see Figure 2).
NOTE Knuckles on the hinge (2602-328) must face the front of the units being installed.
Figure 2
Attach rack ear and hinge to instrument
Pan-head screw (Phillips)
Pan Head Screw (Phillips)
2 pieces
2 Places
(See note**)
(See Note**)
SHIFT
LOCAL
POWER
Front rack ear
Front Rack Ear
(2602-355)
(2602-333)
Hinge knuckle
Front
Front
Mounting
mounting
Holes
holes
Integra Series
HOLD
CONFIG HALT
350V
PEAK
RANGE
AUTO
RANGE
AMPS
Pin
(FA-352)
Flat Head Screw (Phillips)
Flat-head screw (Phillips)
2 Places on each(See Note**)
2 places on each (See note**)
Hinge
(2602-328)
SHIFT
LOCAL
POWER
HOLD
CONFIG HALT
Rear
mounting
Rear
Mounting
holes
Holes
Integra Series
350V
PEAK
RANGE
AUTO
RANGE
AMPS
Note:
**When installing a Model 2100 DMM or Agilent unit,
**When installing a 2100-DMM or Agilent unit, use
use M4x12 screws in the front mounting holes;
M4x12 screws in the front mounting holes; otherwise
otherwise use #8-32x3/8 screws in the rear mounting
use 8-32x3/8 screws in rear mounting holes.
holes.
Pan-head screw (Phillips)
Pan Head Screw (Phillips)
2 pieces (See note**)
2 Places(See Note**)
Front rack ear
Front Rack Ear
(2602-355)
(2602-333)
4. Secure one-half of the hinge to the right instrument and the other half of the hinge to the left instrument,
using two flat-head screws on each half. Check knuckle orientation on hinges; knuckles must face the front
of the units.
5. Bring the two instruments together and secure by inserting the pin (FA-352) to assemble the hinge.
PA-942 Rev. B / February 2008 3
Model 4299-4 Universal Dual Unit Rack Mount Kit Installation Instructions
Step 3: Prepare the rack
Install the cage nuts (FA-274) into the front rack holes for the front rack ear and the half-rack front panel (see
Figure 3).
NOTE Cage nuts for the front rack ear, half-rack front panel should be installed into the rails
at the same hole spacing (vertical height).
Figure 3
Attach rack mount extension arms
Cage nut
Cage Nut
FA-274
FA-274
(4 places)
(4 Places)
Front Rack Rails
Front rack rails
4 PA-943 Rev. B / February 2008
Model 4299-4 Universal Dual Unit Rack Mount Kit Installation Instructions
(4 p
)
Step 4: Install the instruments
NOTE Although the following step may be completed by one person, two people are
recommended.
When rack-mounting restricts access to the main power cord, provide a separate main
power disconnect device. This device must be located in close proximity to the
equipment and within easy reach of the operator.
6. While still supporting the units, secure them to the front rack rails with four truss-head screws
(#10-32x5/8PHTRSH).
Figure 4
Instrument installation
Truss-head screw
Truss Head
(Phillips)
Screw (Phillips)
#10-32x5/8PHTRSH
10-32x5/8PHTRSH
laces
(4 Places)
Front rack
Front Rack
rail (2 pieces)
Rail (2 places)
PA-942 Rev. B / February 2008 5
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