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Model 2790 SourceMeter
Cable leakage
For high resistance measurements in a high humidity environment, use Teflon™ insulated
cables to minimize errors due to cable leakage.
Standard resistance measurements
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Perform the following steps to measure resistance:
1.
2.
3.
4.
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5.
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®
Switch System Reference Manual
Make sure the INPUTS switch is in the correct position. To use front panel
inputs, it must be in the "F" (out) position. For switching modules, it must be in
the "R" (in) position.
If a switching channel is presently closed (displayed), press OPEN to open it.
Select the ohms measurement function by pressing Ω2 or Ω4.
Use the RANGE
and
expected resistance or press AUTO to select autoranging (AUTO annunciator turns
on). Details on range are provided in
Connect the resistance(s) to be measured.
Front panel inputs — Do not apply more than 1000V peak between
INPUT HI and LO or instrument damage may occur.
Model 7702 switching module — Do not apply more than 300V DC or
RMS between input high (H) or input low (L), or switching module
damage may occur.
The 7702 module is safe to use with the 500V source of the 7751 module. The
V-source is energy limited and classified as a non-hazardous source per
EN61010.
If using a switching module, perform the following steps to close the desired chan-
nel. Keep in mind, that for Ω4 measurements, you will close the primary (INPUT)
channel (1 through 20). The paired channel will close automatically.
a.
Press the CLOSE key.
b.
Use
,
,
, and
previously closed channel(s) (if any) will open and the specified channel (or
channel pair) will close.
While in the normal measurement state, you can use the
channels. In general, each key press will open the presently closed channel and
then close the next higher or lower channel.
keys to select a measurement range consistent with the
Section
4.
to key in the channel number and press ENTER. The
3-19
and
keys to close
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