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4-5
10. Repeat the procedure for channels 2 through 12, mea-
suring the resistance between the center conductor and
shield of each channel. For each test:
• Connect the electrometer to the center conductor and
shield of the output bank being tested.
• Close only the channel being tested.
Multiplexer-to-multiplexer isolation
Perform the following steps to check multiplexer-to-multi-
plexer isolation:
1. Connect the Model 6517A Electrometer to the center
conductors of channels 1 and 5, as shown in Figure 4-4.
2. With the power off, install the Model 7038 card in the
mainframe.
3. Turn on the mainframe and the Model 6517A power,
and allow the electrometer to warm up for at least one
hour before making measurements. Make sure the volt-
age source is turned off.
4. Select the Model 6517A ohms function, choose the
2G
Ω
range, and make certain zero check is disabled.
5. Close channels 1 and 5 on the Model 7038.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
CAUTION:
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
INPUT
250V PEAK
!
LINE RATING
50-60HZ
50VA MAX
AC ONLY
LINE FUSE
SLOWBLOW
1/2A 90-125V
1/4A 180-250V
IEEE-488
(CHANGE IEEE ADDRESS
WITH FRONT PANEL MENU)
DIGITAL
I/O
TRIG LINK
1
15V
LO
HI
RS232
!
MADE
IN
U.S.A.
PREAMP OUT
250 PEAK
COMMON
2V ANALOG
OUTPUT
TEMP
TYPE K
HUMIDITY
OPTION SLOT
V SOURCE
EXT TRIG
IN
MTR COMP
OUT
INTERLOCK
SELECTED
LINE VOLTAGE
90-110V
105-125V
180-220V
210-250V
1010V
PEAK
750V
PEAK
IN1
IN2
IN3
IN4
OUTA
IN5
IN6
IN7
IN8
OUTB
IN9
IN10
IN11
IN12
OUTC
Model 7038
Triax Cable
Input
Voltage Source High
Model 6517 Electrometer
Note: Configure electrometer for
internal voltage source
connection.
Connect to connector shield
Mini SMB-to-BNC-to-Triax adapter
Figure 4-3
Connections for center-to-shield isolation tests
Содержание 7038
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