6.3. Measuring Resistance
Warning!
*
Never connect the test leads to a source of voltage when you have
the selected the OHMS function and plugged the test leads into the
V//CAP/Hz/Temp.-terminal.
*
Be sure that the circuit under test has all power removed and that
any associated capacitors are fully discharged before you make a
resistance measurement.
The resistance measuring circuit compares the voltage gained through a
known resistance (internal) with the voltage developed across the
unknown resistance. So, when you check in-circuit resistance, be sure the
circuit under test has all power removed (all capacitors are fully
discharged).
1. Set the rotary selector to the desired OHM range.
2. Plug the black test lead into your meter's COM terminal and the red
test lead into your meter's V//COM/Hz/Temp.-terminal.
3. Connect the test leads to the device you want to measure.
Notes:
*
If the measured resistance value exceeds the maximum value of the
range selected, "OL" appears flashes. This indicates an overload.
Select a higher range. In this mode the beeper does not sound.
When you short the test leads in the 200 range, your meter
*
displays a small value (no more than 0.3 ). This value is due
your meter's and test leads internal resistance. Make a note of this
value and subtract it from small
better accuracy.
resistance
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measurements
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for