Major tech MT1881 IV Manuel d'instruction - Page 10
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7.
Connect the black test probe tip and the red test probe tip in series to
the circuit whose current you want to measure.
8. Apply power to the circuit, read the current on the display.
9. Press the Hz/% Button to indicate "Hz", read the frequency on the
display.
10. Press the Hz/% Button again to indicate "%", read the % duty cycle
on the display.
11. Press the Hz/% Button to return to current measurement.
6.5. RESISTANCE MEASUREMENTS
WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the Ω CAP
2. Insert the black test lead banana plug into the
negative COM jack. Insert the red test lead banana
plug into the positive Ω jack.
3. Press the MODE button to indicate "Ω" on the
display.
4. Touch the test probe tips across the circuit or part
under test. It is best to disconnect one side of the
part under test so the rest of the circuit will not
interfere with the resistance reading.
5. Read the resistance on the display.
6.6. CONTINUITY CHECK
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the Ω CAP
2. Insert the black lead banana plug into the negative
COM jack. Insert the red test lead banana plug into
the positive Ω jack.
3. Press the MODE button to indicate "
on the display
4. Touch the test probe tips to the circuit or wire you
wish to check.
5. If the resistance is less than approximately 30Ω,
the audible signal will sound. If the circuit is open,
the display will indicate "OL".
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position.
position.
" and "Ω"