18
72-9490: OPERATING MANUAL
1. Insert the red test lead into the V1 terminal, blue test lead into the V2 terminal, yellow test lead to V3 input terminal
and black test lead to the COM input terminal.
2. Press the MENU to select Voltage (main display) + Frequency (secondary display) range.
3. Connect the red test leads ( V1 input terminal), blue test leads ( V2 input terminal) and yellow test leads( V3 input
terminal) to the corresponding three phases loaded live wire. Connect the black test lead (COM input terminal) to
the corresponding three phases loaded neutral wire.
4. Press SELECT to select phase location, the display shows the corresponding phase symbol. V1 means the first phase
1, V2 means the first phase 2, V3 means the first phase 3.
5. The display shows the corresponding True RMS voltage value and frequency value of each phase.
6. Press MAX/ , the LCD displays MAX, it starts recording the maximum AC voltage True RMS value. Press MAX/
again to show the current AC voltage True RMS value.
7. Press MAX/ the LCD displays MAX, it starts recording the minimum AC voltage True RMS value. Press MAX/
again to show the current AC voltage True RMS value.
8. The display shows OL when the input voltage is higher than 600V rms.
Note
When the measurement has been completed, disconnect the connection between the testing leads and the circuit under
test and remove testing leads from the input terminals.
The AC Voltage ranges are:15V, 100V, 300V and 600V
The frequency range is:20Hz~500Hz
To measure AC voltage + frequency, connect the Meter as follows: