Figure 4-4 Connections For Channel-To-Channel Isolation Tests - Keithley 2000-Scan Instruction Manual

9.
10.
11.
12.
13.
14.
Figure 4-4
Connections for
channel-to-chan-
nel isolation tests
15.
16.
17.
18.
19.
20.
Close channel 1 using the CHAN key (see
details).
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 the reading is >1GΩ
9 Ω). This measurement represents the isolation resistance between the HI and LO
(10
terminals of channel 1.
Place the Model 617 in standby, and enable zero check.
Repeat steps 9 through 12 for channels 2 through 10. Be sure that the channel under test
is closed.
With the Model 617 voltage source in standby, connect the electrometer to the HI
terminals of scanner card channels 1 and 2, as shown in
Banana to Banana Cable
Ground Link
Com
Removed
INPUT
V-Source LO
Model 617
V-Source HI
Source V and
Measure V/I
Unterminated to
Banana Cable
Close channel 1 using the CHAN key.
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 the reading is >1GΩ
9 Ω). This measurement represents the isolation resistance between the HI terminals
(10
of channels 1 and 2.
Place the Model 617 in standby, and enable zero check.
Repeat steps 14 through 18 to measure isolation resistance between the channel 1 HI
terminal and channels 3 through 10 HI terminals. Be sure that the electrometer is
connected to the HI terminals of the two channels being tested, and that channel 1 is
closed.
Repeat steps 14 through 19 for the LO terminals of channels 1 through 10. Be sure the
electrometer is connected to the LO terminals of the two channels being tested, and that
channel 1 is closed.
Service Information
"Path resistance tests" on page 4-4
Figure
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
4-9
for
4-4.
HI
OUT A
LO
HI
OUT B
LO
2-Pole