Shenzhen Zhiyong Electronics Co., Ltd
9
Even if the input current does not exceed the rated continuous maximum, continuous input
for an extended period of time may result in activation of the safety circuit to prevent
damage resulting from heating of the sensor.
At high ambient temperatures, the built-in safety circuit may activate at current input levels
below the rated continuous maximum.
Continuous input of current exceeding the rated maximum or repeated activation of the
safety function may result in damage to the unit.
The probe is rated for maximum input under two conditions in addition to the input
maximums shown in the Specifications.
These are (1) 30A peak for non-continuous input
and (2) 50A peak for pulse widths 10 µs. (1) indicates an upper waveform response limit
of 30A peak. Use the sensor at RMS current input levels that are within the rated
continuous maximums. (2) Indicates the upper response limit for a single input pulse.
When opening the sensor head of the probe, be sure to operate with the opening lever. If an
upper core is forced to open when the sensor head is locked, the open close mechanism
can be damaged.
The output of this unit is terminated internally. Use an oscilloscope with an input
impedance of at least 1 MΩ.
Immediately after powering on the probe, the probe may be subject to an appreciable
offset drift due to the effect of self heating. To counteract this, allow the probe to warm up
for about 30 minutes before carrying out measurement.
When performing continuous measurements, it is necessary to be aware that the offset
voltage drifts, depending on factors such as the ambient temperature.
Under certain circumstances, oscillation may occur if the probe is connected to the power
supply while the power supply is on. This does not indicate a malfunction. Oscillation can
be stopped and operation restored to normal by opening and closing the sensor head.
Depending on the measured current frequency, some sound maybe produced by resonance,
but has no effect on measurements.
The reading may be affected by the position within the clamp aperture of the conductor
being measured. The conductor should be in the center of the clamp aperture.
When carrying out a measurement, press the opening lever until the
UNLOCK
indication
disappears and check that the sensor head is properly closed. If the sensor head is not
properly closed, an accurate measurement is not possible.
CYBERTEK
