Safe Probing
N2780/1/2/3B User’s Guide
17
CAUTION
The device may sustain damage from self-heating even at current levels
that are lower than the maximum current value defined by the maximum
rated current. The maximum rated current is a recommended value that
assumes sine wave input under standard conditions. Self-heating may
increase if the ambient temperature increases or the measurement
current waveform contains other frequency components. Refer to the
derating characteristics in the product specifications.
CAUTION
Current measurement exceeding approximately 1 kHz may result in
temperature rise on the sensor head. This is attributed to excitation loss
that cannot be prevented due to natural physical principles.
CAUTION
Be careful to avoid injury, electric shock due to short circuits, or damage
to the device that may be caused by the increased temperature.
CAUTION
If excess current is input, 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 sensor has had sufficient
time to cool before resuming operation.
CAUTION
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.
CAUTION
At high ambient temperatures, the built
in safety circuit may activate at
current input levels below the rated continuous maximum.
CAUTION
Continuous input of current exceeding the rated maximum or repeated
activation of the safety function may result in damage to the unit.
