Connections
2-11
The basic connection scheme for guarded ohms measurements is shown in Figure 2-5. If the
guard resistance path (R
G
) is <1k
Ω
, IR drop in the GUARD test lead could be high enough that
the guard voltage at the resistor network is significantly less than the output voltage at the DUT.
This results in leakage current and will corrupt the measurement. To cancel the effect of IR
drop in the GUARD test lead, connect GUARD SENSE to the resistor network as shown in
Figure 2-6. Guard sense ensures that the guard voltage at the resistor network is the same as the
output voltage at the DUT.
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
!
Triax Cable
HI
DUT
WARNING Guard is at the same voltage level as
input/output high. Therefore, if a
hazardous voltage (
≥
42V peak) is
present on input/output high, it is
also present on the guard terminals
of the Remote PreAmp and mainframe.
KEITHLEY
6430
REMOTE
PreAmp
SENSE
MAINFRAME
LO
Banana Plug Cables
6430 Mainframe (rear panel connectors)
Resistor
Network
Ohms
Guard
I
G
<1k
Ω
Guard
Sense
IN/OUT
HIGH
Preamp
Cable*
R
G
*Keithley part number: CA-176-1D.
Figure 2-6
Guarded ohms
connections
(guard sense)
Содержание 6430
Страница 26: ......
Страница 32: ......
Страница 78: ...2 14 Connections ...
Страница 98: ...3 20 Basic Source Measure Operation ...
Страница 138: ...5 30 Source Measure Concepts ...
Страница 156: ...6 18 Range Digits Speed and Filters ...
Страница 168: ...7 12 Relative and Math ...
Страница 176: ...8 8 Data Store ...
Страница 202: ...9 26 Sweep Operation ...
Страница 248: ...11 22 Limit Testing ...
Страница 310: ...16 6 SCPI Signal Oriented Measurement Commands ...
Страница 418: ...17 108 SCPI Command Reference ...
Страница 450: ...18 32 Performance Verification ...
Страница 477: ...A Specifications ...
Страница 489: ...B StatusandErrorMessages ...
Страница 498: ...B 10 Status and Error Messages ...
Страница 499: ...C DataFlow ...
Страница 503: ...D IEEE 488BusOverview ...
Страница 518: ...D 16 IEEE 488 Bus Overview ...
Страница 519: ...E IEEE 488andSCPI ConformanceInformation ...
Страница 523: ...F MeasurementConsiderations ...
Страница 539: ...G GPIB488 1Protocol ...
Страница 557: ......