Performance Verification 18-29
2. Connect the Model 6430 ohms function for the 2-wire sense and configure guard mode
as follows:
• Press CONFIG then MEAS Ω. The instrument will display the following:
CONFIG OHMS
SOURCE GUARD
• Select GUARD, and then press ENTER. The following will be displayed:
GUARD
OHMS CABLE
• Select CABLE, and then press ENTER.
• Press EXIT to return to normal display.
WARNING Hazardous voltage may be present on SHIELD when using guarding.
3. Press MEAS Ω to select the ohms measurement function, and make sure the source out-
put is turned on.
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.
MADE IN
U.S.A.
INPUT/
OUTPUT
42V
PEAK
250V
PEAK
TRIGGER
LINK
4-WIRE
SENSE
HI
LO
LINE RATING
100-240VAC
50, 60, HZ
100VA MAX
RS232
IEEE-488
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
250V
PEAK
5V
PEAK
5V
PEAK
5V
PK
V, Ω,
GUARD
GUARD
SENSE
LINE FUSE
SLOWBLOW
2.5A, 250V
INTERLOCK-
DIGITAL I/O
REMOTE
PreAmp
!
Connect PreAmp
IN/OUT HIGH Jack
Directly to 5156 OUTPUT Jack
BNC Shorting Plug
(Connect to Resistor
Being used)
Note: Remove Link Between
SHIELD and CHASSIS
Mainframe/PreAmp Cable
Model 6430
100GΩ
1 nF
100nF
10GΩ
1GΩ
100MΩ
Model 5156 Electrometer Calibration Standard
Figure 18-9
Connections for
Remote PreAmp
2GΩ-200GΩ
range verification
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