Hioki 9275, Instruction Manual

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3.2 Measurement Procedure
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NOTE
NOTE
CAUTION
3.2 Measurement Procedure
(1) Gently press the lever of the sensor to open the core
section.
(2) Position the sensor so that the current direction mark on
the sensor part points in the direction of the load and so
that the conductor being measured is centered, and then
close the clamp.
If the conductor being measured is not centered, the
results may be affected by its position.
(3) Shake the sensor and confirm that the lever is completely
locked.
Accurate measurement is not possible if the sensor is not
locked.
・
Do not input current that exceeds the maximum input
range. The maximum input range differs, depending
on the frequency of measured current. (See Fig. 2.)
・
If current that exceeds the maximum input range is
input, overheating of the sensor will trip the protective
function for the internal circuitry, so the unit will no
longer produce accurate output. If this happens,
eliminate the input immediately (either by removing
the sensor from the conductor being measured or by
reducing the input current to zero). (Wait until the
sensor has had sufficient time to cool before
resuming operation.)
・
If the above situation occurs repeatedly, or if current
in excess of the maximum input range is input
continuously, the sensor could be damaged.