VT30 V2.1 10/06
2
Introduction
Congratulations on your purchase of the Extech VT30 Multifunction Voltage Tester. The
VT30 measures AC voltage to 480V and DC Voltage to 690V with LCD readout, stepped
voltage bargraph indicator, and LEDs for positive and negative polarity. Additional
features include audible continuity beeper, low impedance test 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.
Safety Instructions
This meter has been designed for safe use, but must be operated with caution. The rules
listed below must be carefully followed for safe operation.
1.
NEVER
apply voltage to the meter that exceeds the specified maximum:
Input Protection Limits
Function Maximum
Input
VAC, VDC, Continuity
480VAC, 690VDC
Low Impedance
3s<400V AC/690V DC
2.
USE EXTREME CAUTION
when working with high voltages.
3.
ALWAYS
discharge filter capacitors in power supplies and disconnect the power when
making continuity tests.
4.
ALWAYS
disconnect the test leads before opening the cover to replace the battery.
5.
NEVER
operate the meter unless the battery cover is in place and fastened securely.
