Keithley 6430 Instruction Manual page 447

Figure 18-9
Connections for
HI
Remote PreAmp
250V
PEAK PEAK
2GΩ-200GΩ
LO
4-WIRE
SENSE
range verification
(ENTER IEEE ADDRESS
WITH FRONT PANEL MENU)
Note: Remove Link Between
2.
WARNING
3.
Model 6430
WARNING:
WARNING:
NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY. NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.
5V
PK
MADE IN
V, Ω,
U.S.A.
GUARD
REMOTE !
250V 5V PreAmp
5V
PEAK PEAK
GUARD
SENSE
LINE FUSE
SLOWBLOW
INPUT/
42V 2.5A, 250V
OUTPUT
PEAK
LINE RATING
100-240VAC
50, 60, HZ
IEEE-488 100VA MAX
INTERLOCK-
TRIGGER
DIGITAL I/O
LINK
RS232
CAUTION:
CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.
Mainframe/PreAmp Cable
SHIELD and CHASSIS
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.
Hazardous voltage may be present on SHIELD when using guarding.
Press MEAS Ω to select the ohms measurement function, and make sure the source out-
put is turned on.
Performance Verification
100GΩ 10GΩ
1 nF
100nF 100MΩ
Model 5156 Electrometer Calibration Standard
18-29
Connect PreAmp
IN/OUT HIGH Jack
Directly to 5156 OUTPUT Jack
BNC Shorting Plug
(Connect to Resistor
Being used)
1GΩ