Extech Instruments MultiMaster MM560, Руководство пользователя

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2. For current measurements up to 5000
µ
A, set the function switch to
the "
µ
A " position and insert the red test lead into the mA-
µ
A jack.
3. For current measurements up to 500mA, set the function switch to the
" A/mA " position and insert the red test lead into the mA-
µ
A jack.
4. For current measurements up to 10A, set the function switch to the
" A/mA " position and insert the red test lead into the 10A jack.
5. Press the SELECT key momentarily to toggle between DC, AC and
AC+DC
6. Remove power from the circuit under test and open the circuit at the
point where you wish to measure current.
7. Touch the black test probe tip to the negative side of the circuit and
touch the red test probe tip to the positive side of the circuit.
8. Apply power to the circuit.
9. Read the current on the display
CAUTION : When measuring a 3-phase system, special attention should
be taken to the phase to phase voltage which is significantly higher than
the phase to earth voltage. To avoid accidentally exceeding the voltage
rating of the protection fuse(s), always consider the phase to phase
voltage as the working voltage for the protection fuse(s).
% 4 – 20mA Measurements
1. Set up and connect as described for DC mA measurements.
2. Press and hold the %4-20mA key for 1 second.
3. The meter will display loop current as a % with 4mA = 0% and 20mA
= 100%
Resistance and Continuity Measurements
CAUTION : Using the resistance or continuity function in a live circuit will
produce false readings and may damage the meter. Always remove
power and isolate the component from the circuit to obtain an accurate
reading.
1. Insert the black test lead banana plug into the negative COM jack and
the red test lead banana plug into the
Ω
jack.
2. Set the function switch to the "
Ω
" position.
3. Press the SELECT key momentarily to select Continuity.
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. For Resistance tests, read the resistance on the display.