ADInstruments AD505N Instrument Manual page 23

AD Instruments
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CAT IV - Is for measurements performed at the source of
the low-voltage installation.
CAT III - Is for measurements performed in the building
installation.
CAT II - Is for measurements performed on circuits
directly connected to the low-voltage installation.
CAT I - Is for measurements performed on circuits not
directly connected to Mains.
Due to our policy of constant improvement and development, we reserve the
right to change specifications without notice.
©Copyright Abacanto Digital SA.
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Manual de usuario AD505N