Offset Current Verification - Keithley 7072 Instruction Manual

SERVICE INFORMATION
Trim Cables
-A
707 Switching Matrix
Figure 4-2. Connecting the Test Cable to the Model 7072
Running the Test
l
Model 617 Electrometer
l
Model 7078-TRX-3 Trim Cable
Follow the instructions given in the Model 707 Instruction
Manual to perform the relay test. The computer will ad-
* Model 6172 2-&t male to 3-lug female triaxial adapter
vise you as to which relay or group of relays (if any) fail
to p&s the test
Test Connections
4.3.4 Offset Current Verification
Figure 4-3 shows the test connections for offset current
verification. The Model 7072 row being tested is to be con-
nected to the Model 617 Electrome& input through the
triaxial cable and the triaxial adapter. Note that the elec-
trometer ground strap is to be removed, and the elec-
trometer should be operated in the unguarded mode.
Recommended Equipment
l
Model 707 Switching Matrix
4-3
I