Tektronix TCP0020, Инструкция по эксплуатации

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Probing Principles
Measuring Differential Current
To simplify your differential or null current
measurements, you can place two conductors
in one current probe.
WARNING. When you are taking measurements on uninsulated conductors, do not exceed the 150 V CAT II voltage limit of the
probe. An uninsulated conductor is any conductor without insulation or without insulation rated for the voltage present on the
conductor under test. If the circuit voltage is above 150 V CAT II, but less than 300 V CAT II, you can take the measurement, but
only on an insulated conductor. Do not exceed the 300 V CAT II voltage rating on any insulated conductor.
An insulated conductor is any conductor that is surrounded by an insulating material that is capable of isolating the voltage present
on the conductor. Lacquer coatings like those typically found on transformer windings do not provide suf
fi cient, reliable insulation
for use with current probes. The lacquer coating can be easily nicked or damaged, compromising the insulating capabilities of
the lacquer coating.
Do not force the slide closed. Damage to the probe may result. If you cannot close the slide around the conductor(s), either reduce
the number of conductors you are measuring, or, if possible, take your measurement on a smaller conductor.
20 A Current Probes Instruction Manual 35