9.
Close channel 1 using the CHAN key (see
“Path resistance tests” on page 4-4
for
details).
10.
On the Model 617, disable zero check, and press OPERATE to source 100V.
11.
After allowing the reading on the Model 617 to settle, verify that the reading is >1G
Ω
(10
9
Ω
). This measurement represents the isolation resistance between the HI and LO
terminals of channel 1.
12.
Place the Model 617 in standby, and enable zero check.
13.
Repeat steps 9 through 12 for channels 2 through 10. Be sure that the channel under test
is closed.
14.
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
Figure 4-4
.
15.
Close channel 1 using the CHAN key.
16.
On the Model 617, disable zero check, and press OPERATE to source 100V.
17.
After allowing the reading on the Model 617 to settle, verify that the reading is >1G
Ω
(10
9
Ω
). This measurement represents the isolation resistance between the HI terminals
of channels 1 and 2.
18.
Place the Model 617 in standby, and enable zero check.
19.
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.
20.
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.
HI
LO
Channel 1
HI
LO
Channel 2-4
Channel 5
HI
LO
Channel 6
HI
LO
Channel 7-9
Channel 10
HI
LO
OUT A
OUT B
HI
LO
2-Pole
4-Pole
Model 2000-SCAN
HI
Model 617
INPUT
Model 7025
Unterminated
Triax Cable
(Red)
Banana to Banana Cable
Ground Link
Removed
Source V and
Measure V/I
Unterminated to
Banana Cable
Com
V-Source LO
V-Source HI
Figure 4-4
Connections for
channel-to-chan-
nel isolation tests
Service Information
4-9
Содержание 2000-Scan
Страница 1: ...Model 2000 ScanScanner Card Instruction Manual A G R E A T E R M E A S U R E O F C O N F I D E N C E ...
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Страница 13: ...1 General Information General Information ...
Страница 17: ...2 CardConnections andInstallation CardConnec tionsandInstal lation ...
Страница 35: ...3 Operation Operation ...
Страница 58: ...3 24 Operation Section 3 Page 24 Tuesday July 8 2003 2 30 PM ...
Страница 59: ...4 Service Information Service Information ...
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Страница 76: ...5 4 Replaceable Parts ...
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Страница 79: ...A Specifications Specifica tions ...
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