Mastech MS8218 - DC mA;AC mA;DC mA + AC mA Measurements

MS8218 True RMS Multimeter
Operation Methods
DC mA/AC mA /DC mA + AC mA Measurements
The measurement is seen in the Figure 3-9. The measurement range of current is of AC or DC 1 μ A ～ 500mA and the
measurement methods are as follows:
1. Turn on the power switch and set the rotary switch to the position mA .
2. Insert the red testing line into the mA/
μ
μμ
μ A input end and the black testing line into the COM input end.
3. Press the SELECT key to select the DC mA, AC mA or the DC mA + AC mA 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 display screen. If it displays as positive during DC measurement, it means the current is
flowing into the meter from 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 DC mA or AC mA measurement, it is possible to select range manually by pressing the RANGE key.
Under the DC mA + AC mA measurement mode the automatic range is held and it is null to press the RANGE key.
Notes: Under the DC mA + AC mA 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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