Nishati AISPCA, Operation Manual

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AISPCA!Operations!Manual!
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23!
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Test!Method!2:!When!AISPCA!is!not!connected!to!a!Solar!Controller!
a.
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Bypass!diode!can!be!easily!tested!using!a!digital!multimeter!with!diode!testing!capability!
b.
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For!each!individual!panel,!test!is!conducted!by!probing!solar!panels!HCT4!connectors!
(see!procedure!in!Table!1!and!expected!multimeter!reading!in!figure!37)!
c.
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It!is!important!that!the!panel!is!shaded!or!turned!away!from!light!or!the!sun!during!this!
test!in!order!to!achieve!accurate!readings!
d. ! If!a!panel!fails!remove!that!panel!from!the!array!and!replace!it!with!working!panel!
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Table!1:!Procedure!for!Verifying!Bypass!Diode!are!Functioning!with!a!Multimeter!
Multimeter!
Setting!
Diode!Direction! Multimeter!
Negative!Lead! Multimeter!
Positive!Lead! Multimeter!
Reading!
Diode!Test! Forward! Panel!Negative! Panel!Positive! Out!of!Limits!(OL)!
Diode!Test! Reverse! Panel!Positive! Panel!Negative! Should!read!less!
than!0.2V!
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!(a)! ! ! !!!!!!!!!!!!(b)!
Figure!37:!Multimeter!used!to!test!diode!function.!In!Figure!37(a)!negative!lead!to!
negative!connector!and!positive!lead!to!positive!connector!shows!‘out!of!limits!(OL).!
In!Figure!37(b),!negative!lead!to!positive!connector!and!positive!lead!to!negative!
connector!shows!a!value!of!less!than!0.2V.!
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