Extech VT10 Operating Manual

User's Guide

Multifunction Voltage Tester
Model VT10

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:

Function Maximum Input
VAC, VDC,
Continuity

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.

Input Protection Limits

600VAC: 30 second max
400VDC: 30 second max

2

VT10 V2.0 08/06