Connections - Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User's Manual

Connections

NOTE
Front panel inputs
Connections for resistance measurements are shown in
measurements (Ω2), connect the test leads to INPUT HI and LO as shown in
For 4-wire resistance (Ω4), connect the test leads to INPUT HI and LO, and SENSE Ω4 HI
and LO as shown in
Model 7700 switching module
Connections for the switching module are shown in
each of the 20 channels can be used to perform Ω2 measurements. For Ω4 measurements, a
channel pair is used for each 4-wire measurement as shown in
For Ω4 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 100kΩ . As shown in
Figure 3-6
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.
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.
Figure 3-6B.
and Figure 3-7, place the resistance in a shielded enclosure and connect the
Basic DMM Operation
Figure 3-6. For 2-wire resistance
Figure 3-7. As shown in
Figure 3-7B.
3-17
Figure 3-6A.
Figure 3-7A,