Model 2750 Multimeter/Switch System User’s Manual
Basic DMM Operation
3-17
Connections
NOTE
When using the front panel inputs, the INPUTS switch must be in the “F” (out)
position. For switching modules, it must be in the “R” (in) position.
Front panel inputs
Connections for resistance measurements are shown in
. For 2-wire resistance
measurements (
Ω
2), connect the test leads to INPUT HI and LO as shown in
For 4-wire resistance (
Ω
4), connect the test leads to INPUT HI and LO, and SENSE
Ω
4 HI
and LO as shown in
B.
Model 7700 switching module
Connections for the switching module are shown in
. As shown in
each of the 20 channels can be used to perform
Ω
2 measurements. For
Ω
4 measurements, a
channel pair is used for each 4-wire measurement as shown in
B.
For
Ω
4 connections, channels 1 through 10 (which are used as the INPUT terminals) are
paired to channels 11 through 20 (which are used as the SENSE terminals). Channel 1 is
paired to channel 11, channel 2 is paired to channel 12, and so on.
Shielding
To achieve a stable reading, it helps to shield resistances greater than 100k
Ω
. As shown in
, place the resistance in a shielded enclosure and connect the
shield to the input low terminal of the instrument electrically.
Cable leakage
For high resistance measurements in a high humidity environment, use Teflon™ insulated
cables to minimize errors due to cable leakage.
2750-900-01.book Page 17 Wednesday, August 3, 2011 7:56 AM
Summary of Contents for 2750
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Page 324: ...12 CommonCommands 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 348: ...15 SCPIReferenceTables 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 374: ...B Model7700ConnectionGuide 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 386: ...C StatusandErrorMessages 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 394: ...D SignalProcessing SequenceandDataFlow 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 408: ...E MeasurementConsiderations 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...
Page 428: ...G IEEE 488BusOverview 2750 900 01 book Page 1 Wednesday August 3 2011 7 56 AM...