Ac Current Measurements - Extech Instruments MA61 User Manual

AC Current Measurements
WARNING: To avoid electric shock, disconnect the test leads from the meter before making
current measurements.
CAUTION: Observe CAT II 600V, CAT III 300V with respect to Earth Ground for the Jaw.
1. Set the Function switch to the 600mA, 6000mA, or 60A range.
2. For the MA63, short press the MODE button to Select AC, Frequency (or DC)
3. Press the Trigger to open the clamp jaw.
4. Clamp onto a single conductor (fully enclosing it). Do not allow a gap between the two halves
of the jaw. Refer to Fig‐3 earlier in the Operation section.
5. When measuring variable frequency devices, press and hold the VFC button to start/stop
measuring with the low pass filter.
6. Read the ACA value on the LCD.
DC Current Measurements (MA63 only)
WARNING: To avoid electric shock, disconnect the test leads from the meter before making
current measurements.
CAUTION: Observe CAT II 600V, CAT III 300V with respect to Earth Ground for the Jaw.
1. Set the Function switch to the 600mA,
6000mA, or 60A range.
2. Use the MODE button to select DC.
3. Press the ZERO button several times to null
the meter display without a conductor in
the clamp jaw. Zero the meter with the
clamp held in the same orientation as the
actual measurement (see Fig‐4).
4. Press the Trigger to open the current sense
Jaw.
7. Fully enclose a single conductor. Do not
allow a gap between the two halves of the
jaw. Refer to Fig‐3 earlier in this guide.
5. Read the DCA value on the LCD.
Fig‐4 Correct and Incorrect ZERO
techniques
ZERO
ZERO
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