Teledyne Lecroy CP031, Руководство оператора

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CP03x/CP03xA Current Probes
Probe A/div and Attenuation
The front panel Volts/div knob controls the oscilloscope’s scale factor and the probe’s
internal attenuation to give full available dynamic range from 10mA/div to 15 A/div for
CP030 and CP031, or 1 mA/div to 15 A/div for CP030A and CP031A. CP031A and
CP031A will automatically adjust attenuation based on the A/div setting.
Alternatively, A/div may be controlled from the channel setup dialog (Cx).
Bandwidth Limit
The probe is capable of switching from Full (maximum bandwidth) to 20 MHz
bandwidth by changing the Bandwidth setting on the Cx dialog.
AC Coupling
In general, using offset to adjust a DC current on the screen is the preferred method to
measure transient signals in the presence of a larger DC currents. The offset has limits
that will cause a signal that is beyond the linear operating range of the probe to go off
the screen, preventing measurement errors.
There are times, however, when it is convenient to use AC coupling to remove the DC
component of the measured signal from the measurement. Selecting AC uses the
scope AC coupling at the probe output to remove any steady state value from the
displayed voltage.
NOTE: Since this AC coupling is on the probe output, DC current beyond the linear
range of the probe will cause the probe to saturate and make the displayed waveform
inaccurate. It is important not to exceed the maximum linear input values when using
AC coupling. The maximum DC input current is 30A when the probe is in 0.1 V/A
sensitivity (>100mA/div), and 5A when the probe is in 1 V/A ( ≤ 100mA/div).
Auto Zero
The Probe dialog incorporates an Auto Zero function to remove the DC offset from the
current probe. Auto Zero must be invoked by the user. After several minutes of
warm-up, or when the probe is exposed to a large shift in ambient temperature, some
DC offset drift may occur. Open the Probe dialog and touch AUTO ZERO .
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