Extech Instruments 480400 User Manual

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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.
 Inspect the test leads for damaged insulation or exposed metal. Check test lead continuity.
Damaged leads must be replaced. Do not use the phase Rotation indicator if it appears
damaged.
 Use care when working above 30V ac rms, 42V ac peak and 60V dc. Such voltages pose a
shock hazard.
 When using the probes, keep fingers away from probe contacts. Keep fingers behind the finger
guards on the probes.
 Measurements can be adversely affected by impedances of additional operating circuits
connected in parallel or by transient currents.
 Verify operation prior to measuring hazardous voltages (voltages above 30V ac rms, 42V ac
peak and 60V dc).
 Do not use the phase Rotation indicator with any of the parts removed.
 Do not use the phase Rotation indicator around explosive gas, vapor, or dust.
 Do not use the meter in a wet environment.
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Extech Instruments 480400 Specifications

Electrical Specifications

nominal voltage	40 to 600 VAC
frequency range	15 to 400HZ
current pickup	1 mA
nominal test current per phase	1 mA
maximum operating voltage	600 V

Operating Environment

operating temperature	0 to 40oC (32 to 104oF)
type of protection	IP 40
safety	For indoor use and in accordance with the requirements for double insulation to IEC1010-1 (1995): EN61010-1 (1995) Overvoltage Category III 600V, Pollution Degree 2.

Weight and Dimensions

dimensions	130 x 69 x 32mm (5.1 x 2.7 x 1.3”)
weight	130g (4.6 oz.)