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3-20 Basic Source-Measure Operation 2400 Series SourceMeter
®
User’s Manual
Measure only
Front panel measure only
In addition to being used for conventional source-measure operations, the
SourceMeter can also be used to measure only voltage or current. Perform the
following steps to use the SourceMeter to measure voltage or current:
1. Select source-measure functions.
Measure voltage only (voltmeter) — Press SOURCE I to select the I-
Source, and press MEAS V to select the voltage measurement function.
Measure current only (ammeter) — Press SOURCE V to select the V-
Source, and press MEAS I to select the current measurement function.
2. Set source and compliance levels.
Use the editing procedure provided in step 2 of the Basic source-measure
procedure to edit the source and compliance levels as follows:
a. Select the lowest source range and set the source level to zero
(0.00000µA or 000.000mV).
b. Set compliance to a level that is higher than the expected measure-
ment.
CAUTION When using the SourceMeter as a voltmeter, V-Compliance
must be set higher than the voltage that is being measured.
Failure to do this could result in instrument damage due to
excessive current that will flow into the SourceMeter.
3. Select range.
Use the RANGE arrow keys to select a fixed measurement range that will
accommodate the expected reading. Use the lowest possible range for best
accuracy. When measuring current, AUTO range can be used instead. The
SourceMeter will automatically go to the most sensitive range. When
measuring voltage, DO NOT use AUTO range (see the following
CAUTION).
CAUTION When using the SourceMeter as a voltmeter only, DO NOT use
AUTO range and NEVER select a measurement range that is
below the applied signal level. For these conditions, high cur
-
rent will be drawn from the external source. This high current
could damage the external source or test circuit.
4. Connect voltage or current to be measured. Connect the DUT to the
SourceMeter using 2-wire connections. (
Figure 2-2).
5. Turn output on. Press the ON/OFF key to turn the output on.
6. Take reading from display.
7. When finished, turn output off.