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4. Circuit on-off measurement
1) Insert red test leads in “Ω” jack and black test leads in “COM” jack.
2) Push the function range switch to the measurement Position “Ω
”, press SELECT to select circuit on-off measurement
and connect test leads in parallel with the two terminals of measured circuit. When the measured resistance between two
terminals <30Ω, the circuit should be deemed conductive, buzzer will sound continuously. When resistance is ≥30Ω, the
buzzer will not sound.
3) Directly read the measured resistance value loaded by the circuit from display.
Note:
When checking a circuit, prior to measurement, be certain to power off all power sources and discharge any inline capacitors.
With respect to the circuit on-off measurement, open-circuit voltage is approximately -3.5V and range should be 600Ω
measurement Position
Do not input voltage higher than DC 42 V or AC 30V, which may cause personal injury.
After completing all measurement operations, disconnect the test leads from the measured circuit.
5. Diode measurement
1) Insert red test lead in “ ” jack and black test lead in “COM” jack. Polarity of red and black test leads are respectively “+”
and “-”.
2) Select the “Ω
” position on the function switch, and press SELECT to select diode measurement and to display the
forward diode voltage drop. For silicon diode junctions, the general voltage drop value is between 500~800mV as a normal
value.
