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High Accuracy Digital Multimeter with USB Interface
5. Read the measured value from the display screen. If ‘OL’ displays on the
meter, it indicates the measured voltage exceeding the range of the meter and
it is necessary to remove the both red and black probes from the measured
circuit immediately avoid damage to the meter.
6. When in DC V mode, by pressing the ‘
RRAANNGGEE
’ key it is possible to work in
manually mode. If ‘OL’ is displayed during manual use, it is necessary to
select a larger range. If ‘OL’ displaying under the maximum range, it indicates
the voltage exceeding 1000V and it is necessary to remove the both red and
black probes from the measured circuit immediately. When performing
DC V + AC V mode (press ‘
SSEELLEECCTT
’ key) the automatic range will hold the
measurement but it is not possible to change the range to manual mode.
NNootteess::
In cases where the probes are hanging in the air, the voltage inducted by
the testing line may cause unstable readings on the display screen, but this will
not affect the accuracy of measurement. When performing DC V + AC V
measurement it will be relatively slow to refresh the measured data as it needs
time to switch AC and DC measurements and to calculate RMS.
3.3 DC mV/AC mV/DC mV+AC mV Measurement
DO NOT try to measure voltage higher than 1000V.
Select
mmVV
. Voltage ranges from 1µV to 500mV
1. Turn on the power and set the rotary switch to the position of
mmVV
.
2. Insert the red and black testing lines into
ddBBmm HHzz VV mmVV ΩΩ
end and
CCOOMM
end respectively.
3. Press the ‘
SSEELLEECCTT
’ key to change from
DDCCmmVV,, AACCmmVV
or
DDCCmmVV++AACCmmVV
measurement modes.
4. When performing
DDCCVVmmVV
measurement, connect the red probe to the
‘+’ (positive) and the black probe to the ‘
_
’ (negative) polarity voltage.
While performing
AACCmmVV
or
DDCCmmVV++AACCmmVV
measurement, connect the red probe
and the black probe into the 2 ends of the measured voltage.
5. Read the measured value from the display screen. If ‘OL’ displaying on the
meter, it indicates the measured voltage exceeding the range of the meter and
it is necessary to remove the both red and black probes from the measured
circuit immediately to avoid damage to the meter.
6. When in DCmV or ACmV mode, by pressing the ‘
RRAANNGGEE
’ key it is possible to
work in ‘manual’ mode. If ‘OL’ is displayed during manual use, it is necessary
to remove the both red and black probes from the measured circuit
immediately. When performing DCmV + ACmV measurement (press the
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