Diode Test; Circuit Continuity Test; Resistance Measurement - Mastech MS8235 Operation Manual

4.10 Diode Test

4.10.1 Plug the black probe into the COM jack and the
red probe into the
4.10.2 Set the range selector to the
4.10.3 Press the "FUNC" key to switch to the
mode.
4.10.4 Connect the red probe to the anode and the black
probe to the cathode of the diode for testing.
4.10.5 Take a reading in the main display area of the LCD.
Note:
1) The meter indicates the approximate forward voltage
drop of the diode.
2) If the test probes are reversed or open, the LCD will
display '0L'.

4.11 Circuit Continuity Test

WARNING
There is the risk of electric shock.
When measuring the continuity of a circuit,
make sure the power is disconnected and the
capacitor on the circuit is fully discharged.
4.11.1 Plug the black probe into the COM jack and the
red probe into the Ω jack.
4.11.2 Set the range selector to the
4.11.3 Press the "FUNC" key to switch to the
continuity test mode.
4.11.4 Connect the test probes to the circuit for
measurement.
4.11.5 If the resistance of the circuit under test is less
than 70Ω, the buzzer in the meter will beep.
4.11.6 Read the resistance of the circuit in the main
display area of the LCD.
jack.
range position.
test
range position.
circuit
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Note:
If the test probes are open or the resistance of the circuit
under test is over 200Ω, "0L" will be displayed on the LCD.

4.12 Resistance Measurement

WARNING
There is the risk of electric shock.
When measuring the impedance of a circuit,
make sure the power is disconnected and the
capacitor on the circuit is fully discharged.
4.12.1 Plug the black probe into the COM jack and the
red probe into the Ω jack.
4.12.2 Set the range selector to the Ω range position.
4.12.3 Press the RANGE key to select auto/manual "
range.
4.12.4 Connect the test probes to the resistor or circuit
under test for measurement.
4.12.5Take a reading in the main display area of the LCD.
Note:
1) In the manual range mode, if the LCD displays 'O L'
only, it means the measurement has exceeded the
range and a higher range should be selected.
2) In case of open input, the LCD will display the '0L'
over-range mode.
3) If the resistance to be measured is higher than 1M
the meter may take a few seconds to get a steady
reading. This is normal for high resistance reading.
"
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