15
High Accuracy Digital Multimeter with USB Interface
the red testing line, while it displays as (‘-’) negative, it means the current is
flowing into the meter from the black testing line. If it displays ‘OL’, indicating
current exceeding range.
6. When performing DCmA or ACmA measurement, it is possible to select range
manually by pressing the ‘R
RA
AN
NG
GE
E’ key. Under the DCmA+ACmA measurement
mode the automatic range is held and it is not possible to change to manual range.
N
No
otte
es
s:: Under the DCmA+ACmA measurement mode, it is relatively slow to refresh
the measured data as it needs time to switch AC and DC measurements and to
calculate RMS.
3.10 DC Ampere/AC Ampere/DC AC Ampere Measurement
Select A
A.. The measurement range of current between AC or DC is from 0.1mA
to 10A.
1. Turn on the power switch and set the rotary switch to the position A
A.
2. Insert the red testing line into the A
A input port and the black testing line
into the C
CO
OM
M input port.
3. Press the ‘S
SE
EL
LE
EC
CT
T’ key to select the D
DC
C A
A,, A
AC
C A
A or D
DC
C A
A+
+A
AC
C A
A measurement
modes.
4. Turn ‘OFF’ the power of the measured circuit, connect the red and black
probes to the measured circuit in a serial way and then turn ‘ON’ the power of
the measured circuit again.
5. Read the measured value from the LCD screen. If it displays as (‘+’) positive
during DC measurement, it means the current is flowing into the meter from
the red testing line, if it displays as (‘-’) negative, it means the current is
flowing into the meter from the black testing line. If it displays ‘OL’, indicating
current exceeding range.
6. When performing DC A or AC A measurement, it is possible to select range
manually by pressing the Range key. Under the DC A + AC A measurement
mode the automatic range is held and it is not possible to change to manual range.
N
No
otte
es
s:: Under the DC A + AC A measurement mode, it is relatively slow to refresh
the measured data as it needs time to switch AC and DC measurements and to
calculate RMS.
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