Connecting the probe
R&S
®
RT-ZC20B
19
User Manual 1802.9967.02 ─ 01
utive maximum current, electric currents in both sides will heat up the sensor
and raise the temperature, thereby causing damage to the sensor.
Drift, oscillation, and sound
●
Immediately after powering on, the probe may be subject to an appreciable
offset drift due to the effect of self-heating. Therefore, warm up the probe for
about 30
minutes before carrying out measurements.
●
When performing continuous measurements, be aware that the offset voltage
drifts, depending on factors such as the ambient temperature.
●
Under certain circumstances, oscillation may occur while the power supply is
on. This does not indicate a malfunction. Oscillation can be stopped and oper-
ation restored to normal by opening and closing the sensor head.
●
Acoustic resonance can occur depending on the amplitude and frequency of
the measured current. This sound may also occur during demagnetizing oper-
ation, but it is not a malfunction or probe failure.
If a foreign substance such as dust is present on the contact surfaces of the
sensor head, a slight gap can occur between the upper and lower sensors,
and a resonant sound may be emitted. Clean the sensors as described in this
manual to ensure correct measurements.
●
An increasing volume of the resonant sound during use may indicate that the
gap between the upper and lower sensors has increased. Since the sensor
characteristics may change, it is recommended to calibrate the device.
Considerations for measurements