Putting into Operation
R&S
®
RT-ZC20
18
User Manual 1409.7814.02 ─ 02
3.3
Demagnetizing and Zero Adjustment
Risk of circuit damage
●
Do not demagnetize while the R&S
RT-ZC20 is clamping a conductor to
be measured. Demagnetizing causes current to flow into the conductor,
which may damage parts in the circuit to be measured.
●
Check that the conductor being measured is not clamped when supply-
ing power to the R&S
RT-ZC20. When power is turned on, a demagnet-
izing waveform is initially applied to the output. This is intentional in the
design, and not a fault.
1. With the waveform measuring instrument input at ground, adjust the trace to
the zero position.
2. Connect the R&S
RT-ZC20 current probe and configure the oscilloscope as
described in
3. Make sure that there is no conductor in the sensor aperture.
4. Press the opening lever until the UNLOCK indication disappears, and check
that the sensor head is properly closed.
5. Press the demagnetizing switch (DEMAG) on the terminator.
The demagnetizing process takes about one second. During demagnetizing, a
demagnetizing waveform is shown on the oscilloscope. The positive and neg-
ative components of this waveform may be asymmetrical.
6. Turn the zero adjustment dial on the terminator to adjust the trace to the zero
position.
Demagnetizing and Zero Adjustment
