Extech Instruments EX530 Guide de l'utilisateur télécharger pdf (Page 8)

EX530-EU_ENG V3.4 1/08

DC/AC MILLIVOLT MEASUREMENTS

CAUTION: Do not measure DC/AC voltages if a motor on the circuit is being switched

ON or OFF. Large voltage surges may occur that can damage the meter.

1. Set the function switch to the green mV DC-AC position.

2. Insert the black test lead banana plug into the negative COM

jack.

Insert the red test lead banana plug into the positive V jack.

3. Press the MODE button to select “DC” or “AC” millivolts.

4. Touch the black test probe tip to the negative side of the

circuit.

Touch the red test probe tip to the positive side of the circuit.

5. Read the voltage in the display.

DC CURRENT 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 black test lead banana plug into the negative COM jack.

2. For current measurements up to 6000µA DC, 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 600mA DC, 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 DC, 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 “DC” 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 negative side of the circuit. Touch the red test probe

tip to the positive side of the circuit.

8. Apply power to the circuit.

9. Read the current in the display.

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