AM300 V1.1 6/07

5

Operation

NOTES: Read and understand all Warning and Caution statements in this operation manual prior to using

this meter.

AC Current Measurements

WARNING: Ensure that the test leads are disconnected from the meter before making current clamp

measurements.

1.

Set the scale to the highest range using the function thumbwheel switch. Step

down to the lower ranges as necessary in order to keep the reading in the upper

half of the scale.

2.

Ensure that the Pointer Lock switch is set to the right-most position so that the

pointer may freely move.

3.

Turn the Zero Adjust screw to zero

the meter display.

4.

Press the trigger to open jaw. Fully

enclose only one conductor. For

optimum results, center the

conductor in the jaw.

5.

The analog display pointer will

indicate the current reading.

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 display to the highest AC or DC Voltage range using

the thumbwheel switch. Step down to the lower ranges as

necessary in order to keep the reading in the upper half of

the scale.

3.

Ensure that the Pointer Lock switch is set to the right-most

position so that the pointer may freely move.

4.

Turn the Zero Adjust screw to zero the meter display.

5.

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

6.

The analog display pointer will indicate the voltage reading.

V

ü

Ð