50
10.4 Fresnel diagram
You can also check if the wiring is right by displaying the Fresnel diagram. The length of the arrows is not proportional
to the efficient value of the currents: the user will have to check that what he sees is coherent.
The position of the voltage arrows is calculated with reference to the voltage V1.
Attention: the angles are those of the voltages/currents representative either of the shape factor or of the fundamental
values.
You can check whether the connection is direct or reverse. Intensity vectors are calculated in reference to the corresponding
voltages.
Attention:
even if nothing abnormal appears, there may be mistakes. In any case, the wirings must be made
with caution by a qualified personal.
10.5 Warning messages
Messages may appear in red any time at the top of the screen:
•
Impossible to synchronize the signal: the frequency is wrong, the signal is too weak or too noisy
•
Caliber exceeded: The voltage or the current are too high for the theoretical nominal value: you must change this
value or use another probe.
10.6 Recording additional channels
You can record additional channels by checking channels to record in the setup of your network analysis. The number of
channels will change as a function of the network (single phase: more additional channels, three phases: less additional
channels):
Figure 10.5
10.7 Real time display of the signals
By pressing
, you have access to the following windows. You have access to this page even during data acquisition.
Each of these windows can be invalidated by pressing
.
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