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F-2
Measurement Considerations
NOTE
This appendix summarizes considerations to make safe, accurate measurements
using the Model 6430. For comprehensive information on these and additional mea-
surement considerations, refer to the Low Level Measurements handbook, which is
available from Keithley.
Floating measurement safety concerns
The Model 6430 can perform
fl
oating measurements up to 42V above chassis ground. Even
though 42V is not considered a lethal level, it is high enough to cause a shock.
Figure F-1 shows two examples where the Model 6430
fl
oats at 40V above chassis ground.
Keep in mind the outer shells of the triax connectors on the Remote PreAmp are connected to
input/output LO. Therefore, 40V is present on those shells as well as the outer casings of the
triax cable(s). If meter LO is connected to a noise shield, then 40V will also be present on that
shield. Typically, a test circuit is enclosed in a test
fi
xture that is connected to a safety earth
ground. The test connection drawings in Section 2 show how a test
fi
xture should be used.
WARNING
To prevent a shock hazard and possible damage to the Model 6430, never
exceed 42V peak between input/output LO and chassis ground.
WARNING
To prevent injury from electric shock, DO NOT touch the triax cables (or
connectors) of the Remote PreAmp while the SourceMeter is turned on or
any external source is turned on.
80V
(R
1
= R
2
)
R
1
HI
40V
V
LO
+
-
R
2
6430
Voltmeter
40V
R
1
40V
A
+
-
R
2
6430
Ammeter
R
3
A. Voltage measurement
B. Current measurement
Figure F-1
Floating measurements
Содержание 6430
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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 ...
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