Frequency Measurements; Ac Current Measurements - Megger AVO410 Guia Del Usuario

3. Connect the test probe tips to the capacitor under test. Be sure to
observe the correct polarity if the capacitor is an electrolytic / polarised
type. Red to positive and black to negative.
4. Read the value on the display.

FREQUENCY MEASUREMENTS

1. Set the function switch to the Hz position (AUTO and Hz will appear on
the display).
2. Insert the black test lead in the COM jack and the red test lead into the
Hz jack.
3. Connect the test probe tips to the circuit under test.
4. Read the frequency on the display.

AC CURRENT MEASUREMENTS

1. Set the function switch to the AC A position. (AUTO, T-RMS and AC A
will appear on the display).
2. Insert the black test lead into the COM jack and the red test lead into the
A jack.
3. Remove power from circuit under test, then open circuit at a convenient
point where current is to be measured.
4. Connect the black test probe to the negative side of the circuit. Connect
the red test probe to the positive side of the circuit.
5. Carefully apply the power
6. Read the measured on the display.
7. Remove supply before removing test leads and reconnecting circuit.
Note: When measuring current on the A current terminal the instrument has
an internal impedance of 0.01 Ω at AC/DC A in series with circuit under test.
The loading effect may cause measurement errors on low impedance circuits.
For example: Measuring a 1 Ω impedance circuit will cause a -1 % measuring
error. The error percentage of the loading effect of the meter can be expressed
as the following:
8