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6-20
Source-Measure Concepts
2400 Series SourceMeter
®
User’s Manual
Model 2440 SourceMeter
The general operating boundaries for the Model 2440 are shown in
Figure 6-8
. In this
drawing, the 5A, 10V and 1A, 40V magnitudes are nominal values. The actual maximum
output magnitudes of the SourceMeter are 5.25A, 10.5V and 1.05A, 42V.
These operating boundaries are valid only if the SourceMeter is being operated in an envi-
ronment 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
, and
“Power equa-
tions to avoid shutdown,” page 6-7
, for details.
The heavy solid lines show the limits for continuous output operation. Note that in quad-
rants II and IV (sink operation), the limits for the 5A and 1A ranges are derated as follows:
5A Range – Limits linearly derated from:
-5A, 0V to -2.5A, 10V
5A, 0V to 2.5A, -10V
1A Range – Limits linearly derated from:
-1A, 10V to -0.7A, 40V
1A, -10V to 0.7A, -40V
If the output duty cycle is decreased to 60% or less, sink operation limits are restored to
normal as shown by the dotted lines in
Figure 6-8
.
Figure 6-8
Model 2440 operating boundaries (T
amb
≤
30°C)
–I
= 100% Duty Cycle
≤
60% Duty Cycle
(III)
Source
–V
+V
+I
(IV)
Sink
(II)
Sink
(I)
Source
-40V
-10V
10V
40V
-5A
-2.5A
-1A
1A
5A
2.5A
0.7A
-0.7A
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Содержание SourceMeter 2400
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