Section 7: Theory of operation Model 2601B-PULSE System SourceMeter Instrument Reference Manual
7-22 2601B-PULSE-901-01A April 2020
Source I measure I, source V measure V
The System SourceMeter
®
Instrument can measure the same function that it is sourcing. For example,
when sourcing a voltage, you can measure voltage. Conversely, if you are sourcing current, you can
measure the output current. For these operations, the measure range is the same as the
source range.
This feature is valuable when operating with the source in compliance. When in compliance, the
programmed source value is not reached, so measuring the source lets you measure the actual
output level.
Measure only (voltage or current)
The figures below show the configurations for using the instrument exclusively as a voltmeter or
ammeter.
As shown in the following figure, to configure the instrument to measure voltage only, set it to source
0 A and measure voltage.
Figure 120: 2601B-PULSE measure voltage only
Set the voltage limit to a level that is higher than the measured voltage. If the voltage limit is
set to a level that is lower than the measured voltage, excessive current will flow into the
instrument. This current could damage the instrument. Also, when connecting an external
energy source to the instrument when it is configured as a current source, set the output off
state to the high-impedance mode. See Output-off states (on page 4-26) for more information
on the output-off states. See Limits (on page 4-2) for details on compliance limit.
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