Mastech MS8239D, Руководство оператора, Страница: 9 / 12

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4.6 Auto Warning
If the input voltage is larger than 2V at the range
and if the input current is larger than 10A, buzzer will
have a long sound
4.7 Auto Power Off
If there's no any operation within fifteen minutes
after power is on, meter will auto power off with
five short sounds and a long sound in a minute.
After auto power off, if stir the transform switch
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or put down any button of “ FUNC .”, “ DATA-H” ,
“ MAX.H ”, ” RANGE ”, meter will recover the
working condition.
• If presses the “ FUNC ” when power is on, auto
power off disab
4.8 Preparation For Measurement
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•
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Put on the “ON/OFF” button. If the battery voltage is
less than 3.8V, display will show “ ” , the battery
should be changed at this time.
The “ ” besides the input jack shows that the input
voltage or current should be less than specification
on the sticker of the meter to protect the inner circuit
from damaging.
Select a function and a range for the item to be
measured through rotating the transform switch
accordingly. When the value scale to be measured
is unknown beforehand, set the range selector at
the highest position.
When connection, first connect to the public testing
line, then to the electriferous testing line. When you'll
remove it, you should remove the elecriferous one.
4.9 Measuring Dc Voltag
WARNING
You can't input the voltage which more than
600V DC, it's possible to show higher voltage,
but it's may destroy the inner circuit.
Pay attention not to get an electric shock
when measuring high voltage.
4.8.1 Connect the black test lead to the COM jack and
the red test lead to the INPUT jack.
4.8.2 Set the transform switch at the V range position.
4.8.3 Put down the "
FUNC. " to enter the DC measurement.
4.8.4 Connect test leads across the source or load
under measurement.
4.8.5 You can get a reading from LCD display. The
polarity of the red test lead connection will be
indicated.