Getting Started
TCPA300/400 Amplifiers and TCP300/400 Series Current Probes Instruction Manual
1-11
(b) Closing and locking the probe
(2) Squeeze
the handle
(1) Unlock the probe
(a) Opening the probe
(2) Lock the probe
(1) Release the handle
Figure 1- 6: TCP303 and TCP404XL slide operation
Degaussing and Autobalancing the Curre nt Probe
Degaussing the probe removes any residual magnetization from the probe core.
Such residual magnetization can induce measurement error. Autobalancing
removes unwanted DC offsets in the amplifier circuitry. Failure to degauss the
probe is a leading cause of measurement errors. The DEGAUSS LED flashes
until you degauss the probe.
To degauss the probe, disconnect the probe from the test circuit, or ensure that
the conductor under test has no power, close and lock the slide, and then press
the amplifier PROBE DEGAUSS AUTOBALANCE button on the front panel of
the amplifier. To maintain measurement accuracy, degauss your probe in each of
these cases:
H After you turn on the amplifier and allow a 20-minute warm-up period.
H Before you connect the probe to a conductor.
H Whenever a current or thermal overload condition occurs.
H Whenever you connect a new probe.
H Whenever you subject the probe to a strong external magnetic field.
H Periodically during normal use.
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