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DIGITAL MULTIMETER
OPERATING INSTRUCTION
can be transformed by putting the ‘RANGE’.
4.13.4 Clamp the circuit under measured.
4.13.5 You can get reading from LCD. The polarity of red
output lead will be indicated.
NOTE:
• Select the DC clamp to measure the DC current.
• At the manual range mode, when only the figure ‘OL’ is
displayed, it indicates overrange situation and the higher
range has to be selected.
• At the manual range mode, when the value scale to be
measured is unknown beforehand, set the range selector
at the highest position.
• Matching problem about the meter and the sensitivity of
the clamp:
a. The sensitivity of 200A range is 200mV, that of 2000A is
2V; the sensitivity of the matching clamp is 0.1A/0.1mV.
The present indicated value is same to the measured
value.
b. If the sensitivity of the selected clamp is low
(0.1A/0.01mV), the indicated value will be 10 times
lower than the measured value. For example, the
measured current is 100A, then the indicated value will
be 10.0A.
c. If the sensitivity of the selected clamp is high
(0.1A/1mV), the indicated value will be 10 times higher
than the measured value. For example, the measured
current is 10A, then the indicated value will be 100.0A.
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