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R&S
RT-ZC20B
Risk of instrument damage due to continuous input current
● The maximum continuous input range is based on heat that is internally
generated during measurement. Always keep the input current below
this level. Exceeding the rated level may result in damage to the probe.
● The maximum continuous input range varies according to the frequency
of the current being measured. Refer to the data sheet "R&S RT-Zxx
Oscilloscope Probes, Specifications"
● The device may sustain damage from self-heating even at current levels
that are lower than the maximum rated current. The maximum rated cur-
rent is a recommended value that assumes sine-wave input under
standard conditions. Self-heating may happen if the ambient tempera-
ture increases or the measurement current waveform contains other fre-
quency components.
● If the input current exceeds a certain level, generated heat activates a
built-in safety function that blocks normal output. If this happens,
remove the input immediately (remove the sensor from the conductor
being measured, or reduce the input current to zero). Wait until the sen-
sor has had sufficient time to cool before resuming operation.
● Even if the input current does not exceed the rated continuous maxi-
mum current, continuous input for an extended period of time may result
in activation of the safety circuit to prevent damage resulting from heat-
ing of the sensor.
● At high ambient temperatures, the built-in safety circuit may activate at
current input levels below the rated continuous maximum current.
● Continuous input of current exceeding the rated maximum or repeated
activation of the safety function may result in damage to the device.
● Current measurement exceeding approx. 1 kHz may result in tempera-
ture rise on the sensor-head. This is attributed to excitation loss that
cannot be prevented due to natural physical principles. Be careful to
avoid injury, electric shock due to short-circuits, or damage to the device
that may be caused by the increased temperature.
● Do not place any unclamped conductor with an electric current of a fre-
quency of 10 kHz or more near the sensor head. Current flowing in the
conductor nearby may heat up the sensor head and cause its tempera-
ture to rise, leading to damage to the sensor. For example, when one
side of a go-and-return conductor is clamped and the other side is also
User Manual 1409.8285.02 ─ 02
Putting into Operation
Connecting the Probe to the DUT
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