User manual

6-10 Source-Measure Concepts 2400 Series SourceMeter
®
User’s Manual
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 for the SourceMeter models are shown in Figure 6-3
through Figure 6-7. 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. See Section 3, “Remote command measure only,”
for more information.
Duty cycle
The duty cycle is the ratio of source on time to total time period expressed as a
percentage. For example, if the source is on for six out of 10 seconds, the duty
cycle is 60%.
Model 2400/2400-LV/2401 SourceMeter
The general operating boundaries for the Model 2400/2400-LV/2401 are shown in
Figure 6-3. In this drawing, the 1A, 20V and 100mA, 200V magnitudes are nomi-
nal values. The actual maximum output magnitudes of the SourceMeter are
1.05A, 21V and 105mA, 210V (21V for 2400-LV and 2401). Also note that the
boundaries are not drawn to scale.
These operating boundaries are valid only if the SourceMeter is being operated in
an environment where the ambient temperature is 30°C or less.
NOTE Above 30°C, high power operation could overheat the SourceMeter,
causing the output to turn off. See
“Overheating protection,” page 6-6 for
details.
The heavy solid lines show the limits for continuous output operation. Note that in
quadrants II and IV (sink operation), the limits for the 1A range are derated as fol-
lows:
1A Range – Limits linearly derated from:-1A, 20V to -0.6A, 20V
1A, -20V to 0.6A, -20V