Keithley 486 Instruction Manual page 49

SEClYION 2
Getting Started
that is installed in the Keithley Model 8002A test fiw-
ture to the Model 487.
WARNING
To prevent contact with possible hazardous
voltages, make sure the Model 487 interlock
is properly connected to the test fixture (see
Figure 2-6). With properuse of Interlock, the
V-Source will not apply voltage to the test
fixture when the lid of the test fixture is
open.
WARNING
To provide protection from shock hazards,
the test fixture chassis must be properly con-
nected to a safety earth ground. A grounding
wire (18 AWG or larger) must be attached se-
curely to the test fixture at a screw terminal
designed for safety grounding. The other
end of the ground wire must then be at-
tached to a known safety earth ground.
5.
To cancel internal offsets, send the following
com-
mand to perform zero correction:
C2X
6.
7.
8.
9.
10.
Use the
V command to program the V-Source. For
example, to set the V-Source for lOV, send the fol-
lowing command string:
VIOX
Note: Asageneralrule,theV-Sourceshould beset as
high as possible to optimize measurement accuracy.
Disable zero check by sending the following com-
man&.
cox
To source voltage to the DUT, place the V-Source in
operate with the following command:
01x
The resistance measuement is displayed on the
Model 487. To send and display the reading on the
computer CRT, the Model 487 must be addressed to
talk.
When finished, enable zero check and place the V-
Source in standby by sending the following com-
mand string:
CIGQX
Z-12