Ac And Dc Voltage Measurements - Extech Instruments MA610 User Manual

AC and DC Voltage Measurements

WARNING: Do not apply > 600VAC/DC between the meter terminals and ground.
CAUTION: When connecting the test leads to the circuit or device under test, connect
the black lead before the red lead; when removing the test leads, remove the red lead before
the black lead.
1. Set the function select switch to the Voltage position
2. Use the M (Mode) button to select AC or DC Voltage.
3. Insert the black test lead banana plug into the negative (COM) jack and the red test lead
banana plug into the red (V) jack. See Fig. 3.
4. Touch the test probe tips to the circuit or part under test.
5. Read the voltage in the LCD. The display will indicate the proper decimal point and value.
6. Relative (REL) mode can be used to set a reference reading from which subsequent
readings will be offset (reference reading – actual reading = displayed reading). Short
press the REL button to store the displayed reading as a reference to which subsequent
measurements will be compared. Short press the REL button to exit the relative mode.
7. The meter can display the frequency (Hz) or duty cycle (%) of the measured voltage.
Short press the Hz % button to step through frequency and duty cycle readings.
8. Short press the H button to freeze/unfreeze the displayed reading.
NOTES: The LCD displays OL when the input exceeds 1000V.
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Fig. 3 – AC/DC Voltage Measurements
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