Keithley 2000-SCAN-20 Instruction Manual page 59

4-8 Service Information
WARNING
7.
8.
9.
10.
11.
12.
13.
14.
15.
Figure 4-4
Connections for channel-to-channel isolation tests
Banana to
Com
Banana
(Ground Link
Cable
Removed)
Model 6171
Triax Adapter
Model 6517A
Model 7025
Unterminated
Triax Cable
16.
17.
18.
19.
20.
The following steps use a 60V. Be sure to remove power from the circuit
before making connection changes.
Place the electrometer in the R measurement function.
Turn on the multimeter power.
Program the multimeter to close channel 1.
On the electrometer, source 60V.
After allowing the reading on the electrometer to settle, verify that the reading is
8 Ω). This measurement represents the isolation resistance between channel
>100MΩ (10
1 HI and LO.
Turn off the electrometer voltage source.
Repeat steps 9 through 12 for channels 2 through 20. Be sure the channel under test is
closed.
Turn off the multimeter power.
With the Model 6517A Electrometer voltage source off, connect the electrometer to
channel 1 HI and channel 2 HI as shown in
Source V and
Measure V/I
V-Source LO
V-Source HI
Unterminated to
Banana Cable
HI
(Red)
Turn on the Model 2000-20 Multimeter power.
Program the multimeter to close channel 1.
On the electrometer, source 60V.
After allowing the reading on the electrometer to settle, verify that the reading is
8 Ω). This measurement represents the isolation resistance between channel
>100MΩ (10
1 HI and channel 2 HI.
Turn off the electrometer voltage source.
Figure 4-4.
Model 2000-SCAN-20
HI
Channel 1
LO
Channel 2-9
HI
Channel 10
LO
4-Pole
HI
Channel 11
LO
Channel 12-19
HI
Channel 20
LO
HI
LO OUT A
HI
OUT B
LO
2-Pole