Ac Current (Frequency, Duty Cycle) Measurements; Resistance Measurements - AD Instruments True RMS AD9929 Manual De Usuario

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AC CURRENT (FREQUENCY, DUTY CYCLE) MEASUREMENTS

CAUTION: Do not make 20A current measurements for longer than 30 seconds. Exceeding 30 seconds may
cause damage to the meter and/or the test leads.
1.
Insert the black test lead banana plug into the negative COM jack.
2.
For current measurements up to 4000µA AC, set the function switch to the yellow µA position
and insert the red test lead banana plug into the µA/mA jack.
3.
For current measurements up to 400mA AC, set the function switch to the yellow mA position
and insert the red test lead banana plug into the µA/mA jack.
4.
For current measurements up to 20A AC, set the function switch to the yellow 10A/HZ/%
position and insert the red test lead banana plug into the 10A jack.
5.
Press the MODE button to indicate "AC" on the display.
6. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure
current.
7. Touch the black test probe tip to the neutral side of the circuit.
Touch the red test probe tip to the "hot" side of the circuit.
8. Apply power to the circuit.
9.
Read the current in the display. In the 10AAC range, right auxiliary display frequency.
10.
Press and hold the MODE button to indicate "Hz".
11. Read the frequency in the display.
12.
Momentarily press the MODE button again to indicate "%".
13. Read the % duty cycle in the display.
14.
Press and hold the MODE button to return to current measurement.
15. Press EXIT for 2 seconds into the function of AC+DC. Test DC and AC TURE Rms.

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 green
2. Insert the black test lead banana plug into the negative COM jack.
Insert the red test lead banana plug into the positive : jack.
3. Press the MODE button to indicate ":" 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 in the display.
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Manual de usuario AD9929
AD Instruments
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