Measuring Operation; Smart Function Measurement; Ac/Dc Voltage Measurement; Resistance Measurement - Mastech MS8301D User Manual

(sleep state). Press " FUNC" key to power on and the
automatic shutdown function will be cancelled.

Measuring Operation

SMART Function Measurement:

Move the rotary switch to the "SMART" position the
default mode is "AC Voltage" "DC Voltage"
"Resistance" or "Continuity", connect the test leads
cross the circut or load to be measured, It will Automatic
judgement on the display.
AC Voltage or DC Voltage, or Continuity or Resistance,
are measured simultaneously.

AC/DC Voltage Measurement:

1
Rotate function selection switch to voltage
measurement position.
2
Press "FUNC" key to select AC or DC voltage
3
Connect black and red test probe to COM input
jack and respectively.
4
Read the measured value from LCD display. When
measuring AC or DC voltage, the display will
simultaneously show the voltage polarity which is
connected with red test probe.
Don't measure any RMS voltage higher than
600V DC or AC, to prevent injury or damage to
meterand equipment.
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Resistance measurement:

1 Rotate function selection switch to resistance
measurement position, and turn off the power to
the circuit to be tested
Connect black and red test probe to COM input
2
jack and respectively.
Measure the resistance of circuit to be tested with
3
other ends of test probes.
Read the resistance value from LCD display. If it
4
is overload, "OL" will display on the LCD display

Here are some tips for measuring resistance:

The resistance measured on a circuit is usually
different from the rated value of resistance. This is
because the test current of the meter will flow through
all possible channels between test probes.
When measuring low resistance, to ensure accuracy,
make a short circuit between the test probes and
read the resistance value of the short circuit. This
resistance value should be subtracted after measuring
the resistance to be tested.
When there is no input (for example, open circuit),
the display will show "OL", which means that the
measured value is out of range.
When measuring resistance or circuit continuity,
to avoid injury or meter damage, turn off the
power to the circuit and discharge all capacitors.
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