Operation; Voltage Measurement; Single Lead Ac Voltage Detection; Low Impedance Voltage Measurement - Extech Instruments VT10 User Manual

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 (+) and negative (-) test leads to the device or
circuit under test.
3. If the voltage is higher than 4.5V AC/DC, the voltage level LEDs will
light and display the reading.
4. For AC voltages, the
For DC voltages, the "DC" LED will light and the "+V" or "-V" LED will
light to indicate polarity.
Note: The measurement time should not exceed 30 seconds. After 30
seconds the meter should be allowed to cool for 10 minutes.

Single Lead AC Voltage Detection

To check for the presence of voltage (between 100V and 600V) using
only the positive test lead (+), touch the lead to the device or circuit
under test. If voltage is present, the
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 LEDs.
Note: The maximum duty cycle in this mode is 5 seconds
for voltages up to 250V. Allow 10 minutes between each reading.
Note: Measuring from hot to ground may trip any GFCI equipped circuits.

Continuity Test

The tester can measure resistance and alert the user if the resistance value is less than
400kΩ.
1. Before taking a continuity test, make sure that power to the device or circuit under
test is off and that all capacitors are discharged.
2. Touch the test tips to the device under test.
3. If the resistance is less than 400kΩ., the tester will sound an audible alert and
the continuity LED will light.

Flashlight

Press and hold the
LED and the "AC" LED will light in the display.
LEDs will light.
button to turn the flashlight on. Release the button to turn the flashlight off.
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VT10 V2.0 08/06