VT30 V2.1 10/06

4

Operation

Always test the meter on a known live circuit before taking measurements

Voltage Measurement

1.

Note: The voltage tester will turn on automatically when voltages

higher than 4.5V AC/DC are detected.

2.

Touch the positive (L2) and negative (L1) test leads to the device or

circuit under test.

3.

If the voltage is higher than 4.5V AC/DC, the LCD will light and

display the reading. The stepped voltage bargraph scale in the

display will also indicate the reading.

4.

For AC voltages, the

LED will light and the “AC” icon will appear in

the display. For DC voltages, the “DC” icon will be displayed. If the

DC voltage is negative, a minus sign will be displayed before the

digital readout.

Single Lead AC Voltage Detection

To check for the presence of voltage (between 100V and 480V)

using only the positive test lead (L2), touch the lead to the device or

circuit under test. If voltage is present, the

LED will light.

Note

: In this mode, the actual voltage is not displayed; only the

presence of voltage is detected.

Low Impedance Voltage Measurement

Due to the lowered internal impedance, capacitive voltage is

suppressed so that the reading shows the actual voltage

applied. This can be used to quickly identify phantom voltages.

1.

Hold the two test tips on the measuring points to be

tested.

2.

Press the two low impedance test buttons

simultaneously.

3.

The Low Impedance LED will light and the applied

voltage will be displayed on the LCD.

Note

: The maximum duty cycle in this mode is 5 seconds for

voltages up to 250V and 3 seconds for voltages up to

690V. Allow 10 minutes between each reading.

Note

: Measuring from hot to ground may trip any GFCI equipped circuits.