2600S-901-01 Rev. C / January 2008
Return to
8-7
Series 2600 System SourceMeter® Instruments Reference Manual
Section 8: Source-Measure Concepts
Assuming the 20V range will be used to measure the voltage:
DC
MAX
56 20
–
(
)
38
5
( )
–
(
)
0
( )
–
38
5
( )
–
(
)
1.5
(
)
----------------------------------------------------------------
100
×
2
≤
DC
MAX
≤ 52.9%
Example 2:
Using a Model 2602 to pulse 10A of current from a bias level of 500mA, into a very low impedance
(100 m
Ω
), while operating at 40°C ambient temperature; what is the maximum duty cycle?
Assuming the 1V range will be used to measure the voltage:
DC
MAX
56 10
–
(
)
18
0.1
(
)
0.5
(
)
–
(
)
0.5
(
)
–
18
10
( )
0.1
(
)
–
(
)
10
( )
--------------------------------------------------------------------------------------
100
×
2
≤
DC
MAX
≤ 4.7%
Example 3:
Using a Model 2612 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
56 5
–
(
)
38
12
( )
–
(
)
0.1
(
)
–
38
12
–
(
)
–
(
)
5
–
( )
---------------------------------------------------------------------
100
×
2
≤
DC
MAX
≤ 3.7%
Operating boundaries
Source or sink
Depending on how it is programmed and what is connected to the output (load or source), the
SourceMeter 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
is operating as a source (V and I have the same polarity). As a source, the SourceMeter is
delivering power to a load.
When operating in the second (II) or fourth (IV) quadrant, the SourceMeter 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.
