Keithley 4299-3 User manual
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
www.keithley.com
PA-942 Rev. C / February 2008 1
Model 4299-3
Universal Single Unit Rack Mount Kit
Introduction
This instruction sheet contains the parts list and installation information for the Keithley Instruments Model
4299-3 Universal Single Unit Rack Mount Kit. This kit includes all the hardware necessary to mount one
half-rack instrument (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 4299-3 Single Unit Universal Rack Mount Kit.
Table 1
Model 4299-3 parts list
Quantity Description Keithley Instruments part number
1
4
1
4
4
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
M4 x 12 Phillips pan head screw
2602-355
FA-274
MC-345
8-32X3/8PPH
10-32X5/8PHTRSH
2602-363
M4X12PPH
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.
Model 4299-3 Universal Single Rack Mount Kit Installation Instructions
2 PA-942 Rev. C / February 2008
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
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.
Mounting ear
Screw
Handle
Mounting ear
Model 4299-3 Universal Single Rack Mount Kit Installation Instructions
PA-942 Rev. C / February 2008 3
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. Secure front rack ear (2602-355) using two pan-head screws (see Figure 2).
Figure 2
Attach rack ear and front panel to instrument
RANGE
AMPS
350V
PEAK
AUTO
SHIFT
LOCAL
POWER
RANGE
HOLD
CONFIG HALT
Integra Series
Pan Head Screw (Phillips)
8-32x3/8PPH
(2 Places)
Pan Head Screw (Phillips)
8-32x3/8PPH
(2 Places)
Front Rack Ear
(2602-333)
(See Note**) Half Rack
Front Panel
(2602-344)
(See Note**)
FRONT
Front
mounting
holes
Rear
mounting
holes
**When installing a 2100-DMM or Agilent unit, use
M4x12 screws in the front mounting holes; otherwise
use 8-32x3/8 screws in rear mounting holes.
3. Secure the half-rack front panel (2602-363) to the other side of the instrument using the two remaining
pan-head screws.
Hal
f
-rack
front panel
(5602-363)
(See note**)
Front rack ear
(2602-355)
(See note**)
** When installing a Model 2100 DMM or Agilent unit,
use M4x12 screws in the front mounting holes;
otherwise use #8-32x3/8 screws in the rear mounting
holes.
Pan-head screw (Phillips)
#8-32x3/8PPH
(
2
p
laces
)
Pan-head screw (Phillips)
#8-32x3/8PPH
(2 places)
Model 4299-3 Universal Single Rack Mount Kit Installation Instructions
4 PA-942 Rev. C / February 2008
Step 3: Prepare the rack
1. 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
Front Rack Rails
Cage Nut
FA-274
(4 Places)
Cage nut
FA-274
(4 places)
Front rack rails
Model 4299-3 Universal Single Rack Mount Kit Installation Instructions
PA-942 Rev. C / February 2008 5
Step 4: Install the instrument
NOTE 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.
2. While still supporting the unit, secure it to the front of the rack with four truss-head screws
(#10-32x5/8PHTRSH) (see Figure 4).
Figure 4
Instrument installation
RANGE
AMPS
350V
PEAK
AUTO
SHIFT
LOCAL
POWER
RANGE
HOLD
CONFIG HALT
Integra Series
Truss Head Screw (Phillips)
10-32x5/8PHTRSH
(2 Places)
Truss Head Screw
(Phillips)
10-32x5/8PHTRSH
(2 Places)
Rack Rails
(not included)
FRONT
Rack rails
(not included)
Truss-head screw
(Phillips)
10-32x5/8PHTRSH
(2 places)
Truss-head screw (Phillips)
10-32x5/8PHTRSH
(2 places)
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