OPERATION
39
Note
DC currents with AC components cannot be
accurately measured if the DC+AC component
exceed the dynamic range for the selected DC
range. Any current exceeding the dynamic range
will be clipped at the upper/lower range limit.
Under these conditions the range that is chosen
with the Auto range function may be too small.
For example:
A
Dynamic Range
0A
Dynamic Range
C
D
B
E
A,B: Input exceeds the dynamic range.
C,D: The DCI offset causes the input to exceed the
upper dynamic range.
E: The DCI offset causes the input to exceed the
lower dynamic range.
The DC current range should be manually selected
when all of the following conditions are true:
When DCI measurement is used.
When the signals being measured contain both
DC and AC components.
When the amplitude of the AC component in
the measured signal is higher or lower than the
dynamic range of the range being currently
selected by the auto-range function.
