4-6
Return to
2600AS-901-01 Rev. B / September 2008
Section 4: Source-Measure Concepts
Series 2600A System SourceMeter® Instruments Reference Manual
Example 3:
Using a Model 2612A to charge a 12V battery by sourcing 100mA and then discharging the battery
by sinking 5A, while operating at 35°C ambient temperature; what is the maximum duty cycle?
Assuming the 20V range will be used to measure the voltage:
DC
MAX
≤ 3.4%
Operating boundaries
Source or sink
Depending on how it is programmed and what is connected to the output (load or source), the
SourceMeter instrument can operate in any of the four quadrants. The four quadrants of operation
are shown in
and
. When operating in the first (I) or third (III) quadrant, the
SourceMeter instrument is operating as a source (V and I have the same polarity). As a source,
the SourceMeter instrument is delivering power to a load.
When operating in the second (II) or fourth (IV) quadrant, the SourceMeter instrument is operating
as a sink (V and I have opposite polarity). As a sink, it is dissipating power rather than sourcing it.
An external source or an energy storage device, such as a capacitor or battery, can force
operation in the sink region.
Continuous power operating boundaries
Model 2601A/2602A continuous power operating boundaries
The general operating boundaries for Model 2601A/2602A continuous power output are shown in
(for derating factors, see
General SourceMeter instrument power equation
, described
earlier in this section). In this drawing, the 3A, 6V and 1A, 40V magnitudes are nominal values.
Also note that the boundaries are not drawn to scale.
DC
MAX
56
5
–
(
)
40
12
(
)
–
(
)
0.1
(
)
–
40
12
–
(
)
–
(
)
5
–
(
)
------------------------------------------------------------------------
100
×
2
≤
