Hioki 9279, Instruction Manual

Page: 43 / 54

13
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Chapter 2 Measurement Procedure
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Current direction
indication
NOTE
Grip the clamp lightly so that the lever snaps
securely shut. At that time, avoid to subjecting
the facing surface of the core to shock.
Make sure that only one conductor is in the
core. Single-phase (2-wire) and three-phase
(3-wire) lines clamped together will not produce
reading.
1. Close the clamp jaws when
the clamp jaws are opened.
2. Make sure that the unit's
power switch is OFF.
3. Connect the clamp-on CT
connector to the unit.
4. Turning the power on the unit.
5. Press the DMAG switch to
magnetize.
(See 2.2 Demagnetizing
(DMAG))
6. Lightly press the lever and
spread the tips of the clamp
with both hands.
7. Align the sensor so that the
current direction indication
corresponds to the direction
of current flow through the
conductor to be measured,
and clamp so that the
conductor is in the center of
the sensor aperture.