MA150 Ver. 2.0 08/07

3

Operation

AC Current Measurements

1) Set the Function switch to the 200A AC range.

2) Press the jaw trigger and clamp around, fully enclosing a single

conductor. Do not allow a gap between the two halves of the jaw.

Refer to the diagram at right for the correct way to enclose a single

conductor.

3) Read the ACA value on the LCD.

AC/DC Voltage Measurements

1) Insert the black test lead into the negative COM terminal and the red test lead into the

positive V terminal.

2) Set the function switch to the V position.

3) Select AC or DC with the MODE button.

4) Connect the test leads in parallel to the circuit under test.

5) Read the voltage measurement on the LCD display.

Resistance and Continuity Measurements

1) Insert the black test lead into the negative COM terminal and the red test lead into the

positive V Ω terminal.

2) Set the function switch to the Ω

position.

3) Use the MODE button to select resistance. The MΩ icon will appear in the display.

4) Touch the test leads across the circuit or component under test. It is best to disconnect

one side of the device under test so the rest of the circuit will not interfere with the

resistance reading.

5) For Resistance tests, read the resistance on the LCD display

6) For Continuity, use the MODE button to select continuity “

•)))”. The display icons will

change when the MODE button is pressed.

7) If the resistance is <120 Ω

a tone will sound.

Diode Test

1) Insert the black test lead banana plug into the negative COM jack and the red test lead

banana plug into the positive V Ω jack.

2) Set the function switch to the Ω

position.

3) Press the MODE button to indicate

on the display.

4) Touch the test probes to the diode under test. Forward voltage will typically indicate

0.400 to 0.700V. Reverse voltage will indicate “OL”. Shorted devices will indicate near

0V and an open device will indicate “OL” in both polarities.

Yes

No