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6-2
Source-Measure Concepts
2400 Series SourceMeter
®
User’s Manual
Compliance limit
When sourcing voltage, the SourceMeter can be set to limit current. Conversely, when
sourcing current, the SourceMeter can be set to limit voltage. The SourceMeter output will
not exceed the compliance limit.
2400
— Current limit can be set from 1nA to 1.05A, and the voltage limit can be set from
200µV to 210V.
2410
— Current limit can be set from 1nA to 1.05A, and the voltage limit can be set from
200µV to 1.1kV.
2420
— Current limit can be set from 10nA to 3.15A, and the voltage limit can be set from
200µV to 63V.
2425 and 2430 DC Mode
— Current limit can be set from 10nA to 3.15A, and the voltage
limit can be set from 200µV to 105V.
2430 Pulse Mode
— Current limit can be set from 10nA to 10.5A, and the voltage limit
can be set from 200µV to 105V.
2440
— Current limit can be set from 10nA to 5.25A, and the voltage limit can be set from
200µV to 42V.
NOTE
For the following discussion, “measurement range” refers to the measurement
function that is the opposite of the source function. When sourcing voltage, the
current measurement range is the point of discussion. Conversely, when sourc-
ing current, the voltage measurement range is the point of discussion.
Types of compliance
There are two types of compliance: “real” and “range.” Depending upon which value is
lower, the output will clamp at either the displayed compliance setting (real compliance)
or at the maximum possible compliance value for the fixed measurement range (range
compliance). This clamping action effectively limits the power that can be delivered to the
device. When the SourceMeter is acting as a current source, the voltage is clamped at the
compliance value; conversely, the current is clamped at the compliance value when the
SourceMeter is acting as a voltage source. Note that range compliance cannot occur if the
AUTO measurement range is selected. Thus, to avoid range compliance, use AUTO range.
NOTE
For the Model 2430, AUTO range is not valid in the Pulse Mode.
When in real compliance, the source clamps at the displayed compliance value. For exam-
ple, if the compliance voltage is set to 1V and the measurement range is 2V, output voltage
will clamp at 1V. In this case, the “CMPL” annunciator will flash.
When in range compliance, the source output clamps at the maximum compliance value
for the fixed measurement range (not the compliance value). For example, if compliance is
set to 1V and the measurement range is 200mV, output voltage will clamp at 210mV. In
this situation, the units in the compliance display field will flash. For example, with the
following display: Vcmpl: 10mA, the “mA” units indication will flash.
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Summary of Contents for SourceMeter 2400
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