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Service Information
15. Disconnect the Model 617 from Channels 1 and 2,
and, in a similar manner, reconnect it to Channels
2 and 3 (electrometer high to Channel 2, and volt-
age source high to Channel 3).
16. Install the card in slot 1 (CARD 1) of the Model
7001 if it is not already installed.
17. Turn on the Model 7001 and program it to close
Channels 1!2 and 1!3.
Banana to Banana Cable
Ground Link
Removed
INPUT
Model
Source V and
Measure V/I
Figure 5-4
Channel to channel testing
5-8
Model 7025
Unterminated
Triax Cable
HI
(Red)
617
Unterminated
Banana Cables
Jumpers
18. On the Model 617, disable zero check and press
OPERATE to source +100V.
19. After allowing the reading on the Model 617 to set-
tle, verify that it is >10G Ω . This is the isolation
between Channels 2 and 3.
20. Using Table 5-2 as a guide, repeat the basic proce-
dure of steps 13 through 19 for the rest of the path
pairs (starting with test #3).
Each Adjacent Channel Pair :
HI
7013
H
IN
L
L
OUT
H
H
IN
L
L
OUT
H
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