14
NNootteess
: When performing measurement on 500µF to 5000µF capacitor, in order
to ensure measurement accuracy the meter takes a relative long time to
discharge capacitor, so it is relatively slow in refreshing the measured value. In
addition, DO NOT perform capacitance measurement on a circuit board with
parallel devices, for that may produce very large errors.
3.8 DC
µµ
A/AC
µµ
A /DC
µµ
A+AC
µµ
A Measurement
Select
uuAA
. The current AC or DC measurement ranges from 0.01µA to 5000µA.
1. Turn on the power and set the rotary switch to the position of
uuAA
.
2. Insert the red testing lines into
uuAA mmAA
input port and the black testing line into
the
CCOOMM
input port.
3. Press the ‘
SSEELLEECCTT
’ key to change between the
DDCC µµAA,, AACC µµAA
or
DDCC µµAA++AACC
µ
AA
measurement modes.
4. Turn ‘OFF’ the power to the measured circuit, connect the red and black probes to
the measured circuit and then turn ‘on’ the power of the measured circuit.
5. Read the measured value from the LCD screen. If it displays a (‘+’) positive
result during the DC measurement, it means the current is flowing into the
meter from the red testing line, if it displays as (‘
_
’) negative the current
is flowing into the meter from the black testing line. If it displays as ‘OL’, it
means current exceeding range.
6. During measurement of DCµA or ACµA, it is possible to select range manually
by pressing the ‘
RRAANNGGEE
’ key. Under the DCµA+ACµA mode automatic range is
held and it is not possible to change to manual range.
NNootteess::
Under the DCµA+ACµA measurement mode, it is relatively slow to refresh
the measured data as it is needs time to switch AC and DC measurements and to
calculate RMS.
3.9 DC mA/AC mA /DC mA+AC mA Measurements
Select
mmAA
. The current AC or DC measurement ranges from 1µA to 500mA.
1. Turn on the power switch and set the rotary switch to the position
mmAA
.
2. Insert the red testing line into the
uuAA mmAA
input port and the black testing line
into the
CCOOMM
input port.
3. Press the ‘
SSEELLEECCTT
’ key to select the
DDCCmmAA,, AACCmmAA
or
DDCCmmAA++AACCmmAA
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
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