Operate the current probe
Operate the current probe
Basic operation
1.
Connect the probe to the ampli
fi
er. (See page 16,
Connect the probe to the
ampli
fi
er
.)
2.
TCP305A and TCP312A only: If desired, install the ground lead to the probe.
(See page 25,
Use the ground lead
.)
3.
Degauss the probe. (See page 24,
Degauss and autobalance the current
probe
.)
CAUTION.
To prevent inaccurate measurements, always degauss the current probe
before taking measurements.
4.
Insert a conductor into the probe. (See page 21,
Operate the current probe
slide
.)
5.
Observe the ampli
fi
er and oscilloscope to make measurements.
Operation precautions
WARNING.
To prevent risk of electric shock or burn, keep your hands behind the
tactile barrier which indicates the limit of safe access.
CAUTION.
To prevent risk of
fi
re, do not connect or disconnect the current probe
to or from a live, uninsulated conductor. The core is not insulated. When you test
uninsulated circuits, remove power before you connect or disconnect the probe.
WARNING.
These probes are not rated for bare-wire voltages above 150 V Cat II,
and insulated-conductor voltages above 300 V Cat II. To reduce risk of electric
shock, do not take measurements with these probes on circuits with voltages
above these limits.
NOTE.
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, which compromises the
insulating capabilities of the lacquer coating.
20
Ampli
fi
ers and Current Probes Compliance and Safety Instructions
