User Manual

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2.10 Notes on Measurement
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AC
+400 V DC
-400 V DC
0
DC DC+AC
Difference between "370 V AC, DC" and "400 V DC max." indication
370 V AC, DC: RMS value is displayed.
400 V DC max.: Instantaneous value is displayed.
The maximum input voltage (400 V DC max.) is defined as the superposition
of DC component and AC peak, as shown in the figure below.