Z200 PV Analyzer
User Manual
NOTICE.
•
Due to the inherent uncertainty of the fault localiza-
tion method and due to the possibility of multiple or
distributed faults, it is highly recommended to verify
a fault position by bypassing a given faulty module
or cable segment with a known good cable and redo
the measurement to ensure good isolation BEFORE
repairing the string e.g. replacing a cable segment or
PV module.
•
It is good practice to verify correct connection of the
string to the instrument AND sufficient illumination
of modules (
>
100
W
m
2
) by comparing the measured
PV voltage with the expected voltage (Number of
modules multiplied by the Voc of each module in the
string).
•
The measurement analysis assumes that modules in
the string are producing evenly. If a fault is not found
accurately, it may point to additional or other prob-
lems and the user is advised to run a String test.
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