c) Resistance measurement (Ω)
Make sure all circuit parts, circuits,
components, and other objects of
measurement are disconnected
from the voltage supply and fully
discharged.
1. Set the function dial to Ω.
2. “Ω” will show on the display.
3. Connect the test leads to the terminals:
- Red test lead to the
terminal.
- Black test lead to the COM terminal.
4. Connect the test lead probes to the correct
test points in the circuit:
- Red: Positive polarity “+”.
- Black: Negative polarity “-”.
Check the lines for continuity by connecting the two test leads. The impedance value
should be ≤ 0.5 Ω (inherent impedance of the measuring lines). If the value is ≥ 0.5 Ω,
check the terminal connections or if there is any damage.
5. Read the resistance values on the display.
- “OL” will appear on the display if the maximum range is exceeded or if the circuit is open.
- When measuring high resistance, it is normal to take a few seconds for readings to
stabilize.
6. When finished measuring, disconnect the test leads and switch the power OFF
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