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Keithley PreAmp Adapter Installation
Model 4200-TMB Triaxial Mounting Bracket
Packing List


Introduction
WARNING Theprocedures in packing are
contained this list intended use qualified
for by service
personnel Do perform
only. not these
procedures unless
qualified do Failure rec-
to so. to
and
ognize observe normalsafety
precautionscouldresult personal
in injury death.
or

This document provides installation instructions for the Keithley Model 4200-TMB. Read through this document and make sure
all components required to complete the installation are available before proceeding.

NOTE The Model 4200 comes with a toolkit containing all tools required to properly install
a Model 4200-TMB as described in this document--no special tools are required.

The Model 4200-TMB is intended to provide a secure mounting bracket for mounting the Model 4200-PA PreAmp on a probe
station or test fixture triaxial connector plate. The Model 4200-TMB is designed to be compatible with the HP 04156-60002
connector plate or any other connector plate designed for use with HP 04155-61602 Kelvin Triaxial Cables. See Figure 1 for
connector plate template.

Figure 1
Connector plate template
M3 x 0.5 11.3 DIA. 3.2 DIA.
(2 places) (2 places) (1 place)


10.3
2.8



14 11 11 14


NOTE Dimensions are shown in millimeters (mm).




PA-633 Rev. A / 2-00
Installation
Use the following procedure for installing each 4200-TMB onto a probe station connector plate.

WARNING Turn power
off all
from connected instrumentation disconnect
and their cords.
line
Make all
sure power removed stored
is and energy external
in circuitry discharged.
is
to all from instrumentation
Failure remove power the couldresult personal
in injury
or
death.


Step 1
Check if gender-changers are required. If so, install two gender-changers on the PreAmp's triax connectors.

Figure 2
Adapter assembly


NOTE Install triax gender-changers
only if required. Probe station
Connector plate
Triax gender-changers
(CS-1069-1)




Adapter plate
(4200-338)


Adapter base
(4200-337)
Recessed (attached to
holes Adapter plate
Remote PreAmp Cable 4200-338)
(4200-RPC-*) PreAmp Screw
(4200-PA) (4-40 x 3/4 PPH)
Dove tail 2 places
(4200-322)


Nut
(4-40 KEPNUT)
2 places
Adapter clamp
(4200-340)

To 4200-SMU
or 4210-SMU




2
Step 2
Install Adapter base (4200-337) onto the connector plate around the desired triax connectors (Figure 2). Secure with provided
screws (4-40-3/4 PPH).


Step 3
NOTE If the Dove tail (Figure 2) is interfering with installation, remove it from the PreAmp
by prying with a flat blade screwdriver. The Dovetail is not required when mounting
the PreAmp in a bracket, only when mounting the PreAmp to a base.

Place the PreAmp (4200-PA) on the Adapter plate (4200-338) and gently push the PreAmp onto the connector plate's triax con-
nectors (Figure 2).


Step 4
Connect the 4200-RPC-* cable as shown in Figure 2.


Step 5
Secure the PreAmp (4200-PA) to the Adapter plate using the Adapter clamp (4200-340) and nuts (Figure 2). The completed
installation is shown in Figure 3.




3
Step 6 (optional)
Attach PreAmp Ground lug to probe station ground using supplied Spade lug (Figure 3). See the 4200-SCS Reference Manual,
Source Measure Concepts, for more details.

Figure 3
Installed adapter




Dove tail


To probe station ground




Spade lug


Ground lug




4