The following programming example illustrates how to print the limit state:
print(smua.source.compliance)
A returned value of true indicates one of these things:
• If the instrument is configured as a current source, the voltage limit has been reached
• If the instrument is configured as a voltage source, the current limit has been reached
Sink operation
Carefully consider and configure the appropriate output-off state, source function, and
compliance limits before connecting the 2600B to a device that can deliver energy (for
example, other voltage sources, batteries, capacitors, solar cells, or other 2600B
instruments). Configure recommended instrument settings before making connections to the
device. Failure to consider the output-off state, source, and compliance limits may result in
damage to the instrument or to the device under test (DUT).
When operating as a sink (voltage and current have opposite polarity), the instrument is dissipating
power rather than sourcing it. An external source (for example, a battery) or an energy storage device
(for example, a capacitor) can force operation into the sink region. For example, if a 12 V battery is
connected to the voltage source (HI to battery +) that is programmed for +10 V, sink operation occurs
in the second quadrant (source +V and measure −I).
When operating as a sink, limit inaccuracies are introduced. Enabling sink mode reduces the source
limit inaccuracy seen when operating in quadrants II and IV. Quadrants I and III show this source
limit inaccuracy.
The sink operating limits are shown in “Continuous power operating boundaries” in the Series 2600B
Reference Manual.
When using the current source as a sink, always set the voltage compliance to a level that is
higher than the external voltage level. Failure to do so could result in excessive current flow
into the instrument and incorrect measurements. See Limits (on page 4-2) for details about
compliance limits.
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