Keithley 4299-2 User manual

Model 4299-2
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
1-888-KEITHLEY
www.keithley.com
PA-909 Rev. C / May 2007 1
Universal Dual Unit Adjustable
Heavy-Duty Rack Mount Kit
Introduction
This instruction sheet contains a parts list and installation information for the Model 4299-2 Universal Dual Unit
Heavy-Duty Rack Mount Kit. This kit includes all hardware necessary to specifically mount two Model 260x
SourceMeter® Instruments or 1 model 260x with most other Keithley or Agilent Half Rack Products in a standard
19-inch rack.
Parts list
Table lists the parts supplied with the Model 4299-2 Dual Unit Adjustable Heavy-Duty Rack Mount Kit.
4299-2 part listing
Quantity Description Keithley part number
2
2
2
2
1
1
8
1
4
4
4
8
2
2
2
2
2
Hinge
Front Rack Ear
Rear Rack Mount Bracket
Rack Mount Extension Arm
Rear Bracket
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 3/8 LG Phillips Pan Head Sems Screw
#10-32 X 5/8 LG Phillips Truss Head Screw
#6-32 X 5/8 LG Phillips Pan Head Screw
#6 Lockwasher
Washer
M4X12 Phillips Pan Head Screw
M4X12 Phillips Flat Head Screw
2602-328
2602-333
2602-334
2602-335
2304-327
FA-352
FA-274
MC-345
8-32X3/8PPH
8-32X3/8PFH
10-32X3/8PPHSEM
10-32X5/8PHTRSH
6-32X5/8PPH
6LKWA
WA-81
M4X12PPH
M4X12MMPFH

Model 4299-2 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 260x’s 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 that could
cause excessive heating to occur. The specified ambient temperature must be
maintained around the surfaces of the Model 260x to maintain specified accuracies.
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:
• 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.
2 PA-909 Rev. C / May 2007

Model 4299-2 Instructions
PA-909 Rev. C / May 2007 3
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.
Figure 1
Remove handle and mounting ears
Mounting ear
Screw
Handle
Mounting ear
2. Remove both rear feet from the instrument by pulling out the rubber feet and then removing the screws
underneath.
NOTE Do not re-install the feet mounting screws. Save all parts removed for future bench top use of
the instrument.

Model 4299-2 Installation Instructions
Step 2. Install mounting hardware to instrument
NOTE Install the mounting hardware on the rack rail side of each unit (not the same side as the other
unit) (see 2).
1. Determine and select the unit’s side that is to be installed closest to the rack rail (see Note).
2. Secure one Rear Rack Mount Bracket (2602-334) to each instrument on the selected side using two Pan
Head Sems Screws (10-32x3/8PPHSEM) (refer to Figure 2).
Figure 2
Attach rear rack mount bracket
Pan Head Sems
Screw (Phillips)
10-32x3/8PPHSEM
(2 Places)
Rear Rack Mount Bracket (2602-334)
(See Note**)
Pan Head Sems
Screw (Phillips)
10-32x3/8PPHSEM
(2 Places)
Rear Rack Mount Bracket
(2602-334)
(See Note**)
FRONT
**Discard one Rear Rack Mount Bracket if one of the units
does not support the use of the rear rack mount support.
4 PA-909 Rev. C / May 2007

Model 4299-2 Instructions
PA-909 Rev. C / May 2007 5
3. Place the instruments side-by-side as they will be installed in the rack (refer to Figure 3).
4. Secure Front Rack Ear (2602-333) to outside of each instrument using two Pan Head Screws
(8-32x3/8PPH ) on the same side as the Rear Rack Mount Bracket (2602-334).
NOTE Knuckles on Hinge (2602-328) must face front of units.
5. Secure one-half of Hinge (2602-328) to right instrument and other half of Hinge (2602-328) to left
instrument using two Flat Head Screws (8-32x3/8PFH) on each half. Check knuckle orientation on
hinges—knuckles must face front of units.
6. Bring the two instruments together and secure by inserting Pin (FA-352) to assemble the Hinge (2602-
328).
7. If the two K.I. units are of the same length, remove one rear bezel screw from each unit as shown (Figure
5). Install the Rear Bracket (2304-327) securing it (and the applicable rear bezels) with the #6-32x5/8PPH
screws and washers supplied.
Figure 3
Secure instrument together
RANGE
AMPS
350V
PEAK
AUTO
SHIFT
LOCAL
POWER
RANGE
HOLD
CONFIG HALT
Integra Series
Pan Head Screw (Phillips)
2 Places(See Note**)
Pan Head Screw (Phillips)
2 Places
(See Note**)
Front Rack Ear
(2602-333)
RANGE
AMPS
350V
PEAK
AUTO
SHIFT
LOCAL
POWER
RANGE
HOLD
CONFIG HALT
Integra Series
Flat Head Screw (Phillips)
2 Places on each(See Note**)
Hinge
(2602-328)
Rear Bracket
(2304-327)
(See Note*)
Use Existing
Rear Bezel Screws
Front Rack Ear
(2602-333)
Pin
(FA-352)
Front Mounting
Holes used for the
2100 DMM or
Agilent product
Rear Mounting Holes
used for any KI product
other than the 2100
DMM
Note:
*Rear bracket used only with Keithley produdcts of
the same length, excluding the 2100 DMM
**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.

Model 4299-2 Installation Instructions
Step 3. Prepare the rack
1. Install Cage Nuts (FA-274) into rack holes to be aligned with the holes in the Rack Mount Extension
Arms (2602-335) (refer to Figure 4). (The rack holes selected determine unit placement in rack.)
2. Install one Rack Mount Extension Arm (2602-335) onto one of the rear rack rails and secure using two
Truss Head Screws (10-32x5/8PHTRSH).
3. Repeat for other side.
4. Install Cage Nuts (FA-274) into front rack rail holes aligned with the rear cage nuts (refer to Figure 4).
Figure 4
Attach rack mount extension arms
Truss Head Screw (Phillips)
10-32x5/8PHTRSH
(2 Places)
Cage Nut
FA-274
(2 Places)
Rack Mount
Extension Arm
(2602-335)
(2 Places)
(See Note**)
Front Rack Rails
Cage Nut
FA-274
(4 Places)
Rear Rack Rails
**As per the instructions in Fig.2, discard
one rack mount extension arm
6 PA-909 Rev. C / May 2007

Model 4299-2 Instructions
PA-909 Rev. C / May 2007 7
Step 4. Install Instruments
NOTE Although the following step may be completed by one person, two 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.
1. Slide units into rack by aligning both Rear Rack Mount Brackets (2602-334) with the associated Rack
Mount Extension Arms (2602-335) (refer to Figure 5).
2. While still supporting the units, secure them to the front rack rails with four Truss Head Screws (10-
32x5/8PHTRSH).
Figure 5
Install instruments
Rack Mount
Extension Arm
(2602-335)
(2 places)
Truss Head
Screw (Phillips)
10-32x5/8PHTRSH
(4 Places)
Rear Rack
Mount Bracket
(2602-334)
(2 places)
Front Rack
Rail (2 places)

Model 4299-2 Installation Instructions
Truss Head
Screw (Phllips)
10-32x5/8PHTRSH
(4 Places)
Front Rack
Rail (2 places)
8 PA-909 Rev. C / May 2007