Extech Instruments VT10 User manual

User's Guide

Multifunction Voltage Tester

Model VT10

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Back to the Extech VT10 Product Info Page

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX 781.665.0780 - TestEquipmentDepot.com

VT10 V2.0 08/06

Introduction

Congratulations on your purchase of the Extech VT10 Multifunction Voltage Tester. The

VT10 measures AC Voltage to 600V and DC Voltage to 400V with LED indicators, and

LEDs for positive and negative polarity. Additional features include audible continuity

beeper, low impedance mode for eliminating phantom voltages, and a built-in flashlight

to illuminate test connections during measurements. This meter is shipped fully tested

and with proper use will provide years of reliable service.

Safety

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates the user

must refer to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal use,

hazardous voltages may be present

Double insulation

Safety Precautions

1. Improper use of this meter can cause damage, shock, injury or death. Read and

understand this manual before use.

2. Ensure that any covers or battery doors are properly closed and secured before use.

3. Inspect the condition of the test leads and the meter itself for any damage before

use.

4. Do not exceed the rated input limits.

5. Use great care when taking measurements greater than 25VAC rms or 35VDC.

These voltages are considered a shock hazard.

6. Discharge capacitors and remove power from the DUT before Continuity tests.

7. Remove the batteries from the meter if the meter is to be stored for long periods.

8. Voltage measurement results on electrical outlets can be misleading because of the

difficulty in making a proper connection to the electrical contacts.

9. NEVER apply voltage to the meter that exceeds the specified maximum:

Input Protection Limits

Function Maximum Input

VAC, VDC,

Continuity

600VAC: 30 second max

400VDC: 30 second max

10. USE EXTREME CAUTION when working with high voltages.

11. ALWAYS discharge filter capacitors in power supplies and disconnect the power

when making continuity tests.

12. ALWAYS disconnect the test leads before opening the cover to replace the battery.

13. NEVER operate the meter unless the battery cover is in place and fastened

securely.

Description

1. Test Probe (-)

2. Test Probe (+)

3. Flashlight

4. LED voltage level indicators

5. LED (AC voltage indicator)

6. LED (low impedance test indicator)

7. LED (DC +V/-V polarity indicators)

8. LED (continuity indicator)

9. LED (AC/DC voltage indicators)

10. Low impedance button (+)

11. Flashlight button

12. Battery cover

13. Low impedance button (-)

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX 781.665.0780 - TestEquipmentDepot.com

VT10 V2.0 08/06

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 LED and the “AC” LED will light in the display.

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 LEDs 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 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

400k.

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 400k., the tester will sound an audible alert and

the continuity LED will light.

Flashlight

Press and hold the button to turn the flashlight on. Release the button to turn the flashlight off.

VT10 V2.0 08/06

Maintenance

Battery replacement

1. Disconnect the meter from any test device or circuit before

opening the tester.

2. Loosen the recessed Phillips head screw at the bottom of the

tester. Do not remove the screw.

3. Hold the meter and pull the lower portion of the meter off until

the batteries are exposed.

4. Replace the two ‘AAA’ batteries observing polarity and dispose

of the old batteries properly.

5. Slide the meter back together and replace the screw.

Cleaning and Storage

Before cleaning the tester, ensure that the test leads are not connected to any circuit or

device. Wipe the meter only with a damp cloth as needed. Do not apply abrasives, solvents,

or other cleaners to the surface of the meter. Store with the battery removed and avoid

extreme temperature and humidity.

Specifications

Voltage LED steps AC: 24, 48, 120, 208, 240, 277, 480, 600

DC: 6, 12, 24, 36, 48, 110, 220, 400

ACV frequency range 50/60Hz

LED enable input voltage >4.5V AC/DC

Accuracy -30% to 0% of the indication

Range selection Automatic

Max measuring current 1.2mA (600VAC); 1.0mA (400VDC)

Display delay LED indication <0.1s

Input Impedance 1M(approx)

Continuity test Range 0 to 400k, guaranteed on < 50k; <10µA test

current;

Low impedance test 12-250VAC/DC; impedance <6k;

Operation time: 30 seconds on/10 minute off duty cycle

Power supply 2 x “AAA” 1.5V alkaline batteries, 50mA max

Battery life Approx. 8 hours continuous use typical

Operating Temperature 14 to 131oF (-10 to 55oC)

Storage Temperature -22 to 140oF (-30 to 60oC)

Operating Humidity 10 to 85% RH (non-condensing)

Operating Altitude 7000 ft. (2000 meters) maximum

Safety This meter is intended for origin of installation use and

protected, against the users, by double insulation per

EN61243-3 and IEC61243-3 to Category IV 600V and

Category III 1000V; Pollution Degree 2.

Approvals CE, IP64

Dimensions 9.4 x 3 x 1.6” (240 x 78 x 40mm)

Weight 9.2oz (260g)

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