Model 4299-2 Dual-Unit Rack-Mount Kit Installation Instructions
PA-909 Rev. J April 2021
7
If the two Keithley Instruments are the same depth, you can install the rear bracket onto the rear bezels. To do
this:
1. Remove one rear bezel screw from each instrument. Do not completely remove the rear bezel.
2. Install the rear bracket (2304-327) and secure it and the applicable rear bezels with two Phillips pan-head
screws (#6-32 × 5/8 PPH), washers (WA-81), and lock washers (6LKWA).
Figure 7: Install rear bracket
Prepare the rack
To prepare the rack for installation:
1. Install the cage nuts (FA-274) into the rack holes to be aligned with the holes in the rack-mount extension
arms (2602-335). The rack holes selected determine the placement of the instrument in the rack (see the
following figure).
2. Install one rack-mount extension arm onto one of the rear rack rails and secure it using two Phillips truss-
head screws (#10-32 × 5/8 PHTRSH).
Cage nuts for the front rack-ear and rack-mount extension arm should be installed into the rails at
the same hole spacing (vertical height).
