Extech 480400 Operating Manual

User's Guide

Phase Sequence Tester

Model 480400

Introduction

Congratulations on your purchase of the Extech Model 408400
Phase Sequence Tester. This handheld instrument detects the
phase sequence of three-phase systems. Color-coded test leads
are provided for connecting to the three mains phases of the
system under test. This meter is shipped fully tested and calibrated
and, with proper use, will provide years of reliable service.

Safety

International Safety Symbols

Caution ! Refer to the explanation in this Manual

!

Caution ! Risk of electric shock

Earth (Ground)

Double Insulation or Reinforced insulation

AC, Alternating Current or Voltage

DC, Direct Current or Voltage

Safety Procedures

To avoid possible electric shock or fire, observe the following:
 Read the following information carefully before using or servicing

the instrument.

 Adhere to local and national safety codes.
 Individual protective equipment must be used to prevent shock

and injury.

 Use of instrument in a manner not specified by the manufacturer

may impair safety features/protection provided by the
equipment.

 Avoid working alone.

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