Figure 4-5 Connections For Hi And Lo Terminal To Chassis Ground Isolation Tests - Keithley 2000-Scan Instruction Manual

4-10 Service Information
21.
Figure 4-5
Connections for HI and
LO terminal to chassis
ground isolation tests
22.
23.
24.
25.
26.
27.
With the electrometer voltage source in standby, connect the electrometer to channel 1
HI and chassis ground, as shown in
Banana to Banana Cable
Ground Link
Com
Removed
INPUT
V-Source LO
V-Source HI Model 617
Source V and
Measure V/I
Unterminated to
Banana Cable
Chassis Ground
Program the Model 2000 to close channel 1.
On the Model 617, disable zero check, and press OPERATE to source +100V.
After allowing the reading on the Model 617 to settle, verify that it is >1GΩ (10
Put the electrometer in standby, and enable zero check.
Repeat steps 21 through 25 for channels 2 through 10. One electrometer lead should be
connected to the HI terminal of the channel being testing, and the other lead should be
connected to chassis ground.
Repeat steps 21 through 26 for channels 1 through 10 LO terminals. One electrometer
lead should be connected to the LO terminal of the channel being tested, and the other
lead should be connected to chassis ground. In addition, channel 1 should be closed.
Figure 4-5.
Model 7025
Unterminated
Triax Cable
HI
(Red) HI
Channel 1
LO
Channel 2-4
HI
Channel 5
LO
4-Pole
HI
Channel 6
LO
Channel 7-9
HI
Channel 10
LO
Model 2000-SCAN
HI
OUT A
LO
HI
OUT B
LO
2-Pole
9
Ω).