PeakTech 3415 USB DMM, Руководство по эксплуатации

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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/
Ω
/Hz/ -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/
Ω
/Hz/ - 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. This indicates an overload.
Select a higher range. In this mode, the beeper does not sound.
* When you short the test leads in the 600
Ω
range, your meter
displays a small value (no more than 0.3
Ω
). This value is due to
your meter´s and test leads internal resistance. Make a note of
this value and subtract it from small resistance measurements for
better accuracy.
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