Resistance Measurement; Continuity Measurement; Diode Test - Mastech MS8361D User Manual

• Turn circuit power on and read the measurement on the
display, it means the measurement has exceeded the
current range. Move the rotary switch to a higher range.
Note:
- Check fuses before making current measurements. Make
sure to use correct input jacks to prevent damage to the
meter.

4.3 Resistance measurement

• Turn off the power to the circuit. Allow all capacitors to
discharge.
• Set the rotary switch to the multi-function position. The
default function is resistance.
• Connect the red test lead to the input jack and the black
lead to the COM jack.
• Connect the leads to the circuit under test and read the
measurement on the display.
Tips for measuring resistance:
• In-circuit resistance is usually different from a resistors
rating due to the factthat the meter's test current flows in
parallel with the circuit.
• For increased accuracy when measuring low resistance,
short the test leads, record the test displayed, then
connect the leads to the circuit and subtract the shorted
value from the circuit measurement.
• When the leads are disconnected from the circuit under
test, "OL" will be displayed on the screen.
WARNING
To prevent injury or damage to the meter, turn off power to
circuitand discharge all capacitors fully before making
resistance measurements.
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4.4 Continuity measurement

• Turn off the power to the circuit. Allow all capacitors to
discharge.
• Set the rotary switch to the multi-function position.
Press "FUNC" twice to enter continuity mode.
• Connect the red test lead to the input jack and the black
lead to the COM jack.
• Connect the leads to the circuit under test. If the
measured resistance is less than 50Ω,
the buzzer will
sound.
WARNING
To prevent injury or damage to the meter, turn off power to
circuit and discharge all capacitors fully before making
continuity measurements.

4.5 Diode test

• Turn off the power to the circuit. Allow all capacitors to
discharge.
• Set the rotary switch to the multi-function position.
Press "FUNC" once to enter diode mode.
• Connect the red test lead to the input jack and the black
lead to the COM jack.
• Connect the red test lead to the anode (+) and the black
lead to the cathode (-) of the diode and read the meas-
urement on the display.
The meter will display "OL" if the connection is reserved.
WARNING
To prevent injury or damage to the meter, turn off power to
circuit and discharge all capacitors fully before making diode
measurements.
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