Model 6517B Electrometer Reference Manual
Section 3: Connections
6517B-901-01 Rev. C / August 2015
3-11
Connecting PREAMP OUTPUT, COMMON, or 2V ANALOG OUTPUT to earth (chassis) ground
while floating the input may damage the instrument.
Figure 23: Floating V-source
Test fixtures
Whenever possible, use shielded, low leakage test fixtures to make precision measurements.
Keithley Instruments Model 8009 test fixture
This test fixture allows volume resistivity in the range from 103 to 1018
-cm, and surface resistivity
in the range from 103 to 1017
/sq. cm. Features include:
A 3-lug triaxial connector and dual binding posts simplify connections to the Model 6517B.
Guarded electrodes that can accommodate samples up to 1/8
thick and 4
4
Safety Interlock: When connected to the Model 6517B, the V-source goes into standby when the
test fixture lid is open.
Screw terminal on test fixture chassis for connection to safety earth ground.
