9
MEASUREMENT OPERATIONS - MEASURING AC CURRENT
•
Set the measuring function range of AC current
by rotating the dial to
A
. The meter will be
within the measuring function range of AC current
as default.
•
Clamp the instrument to the input current signal
to be tested.
•
Clamp a single current lead to be tested and
keep it at the bottom of the “U” clamp head.
•
The clamp meter will automatically select the
proper range and display the true virtual value of
AC current in the centre of the screen.
•
Frequency response range: 50Hz-60Hz.
•
Warning
: the largest measuring current
must not be greater than 200A AC during the
measurement of AC current.
MEASURING DC CURRENT
•
Set the measuring function range of DC current
by rotating the dial to
A
. The Meter will be
within the measuring function range of DC current
as default.
•
Press the
SELECT
button to switch into the
measuring function range of DC current.
•
Clear the base number of the measuring range of
DC current.
•
As the clamp head sensor reacts to terrestrial
magnetism and surrounding magnetic field, there
generally exists a base number even without
measuring.
•
Therefore, before measuring DC current, the
base number should be cleared by pressing the
ZERO
button.
•
Measurements must be conducted after the base number is cleared and the
measured value returns to zero.
•
Clamp the instrument to the input current signal to be tested.
•
Clamp the single current lead to be tested and keep it at the bottom of the “U”
clamp head.
•
The Meter will automatically select the proper range.
•
If the current direction is in the same direction as that as that of the clamp head,
it will display the positive value of AC current in the centre of the display screen,
otherwise it will display the negative current value.
•
Warning
: the largest measuring current must not be greater than 200A DC during
measurement of DC current.
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Содержание 72-3545
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