Extech Instruments 480403 User manual

User's Guide
Phase Sequence and Motor
Rotation Tester
Model 480403

480403 V1.0 6/072
Introduction
Congratulations on your purchase of the Extech Model 408403
Motor and Phase Rotation Indicator. This handheld instrument
detects the rotational field of three-phase systems and determines
motor-rotation direction. Color-coded test leads are provided for
connecting to the system or motor 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.

480403 V1.0 6/073
Inspect the test leads for damaged insulation or exposed
metal. Check test lead continuity. Damaged leads must be
replaced. Do not use the meter 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 meter with any of the parts removed.
Do not use the meter near explosive gas, vapor, or dust.
Do not use the meter in a wet environment.
Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument
to be free of defects in parts and workmanship for one year from date
of shipment (a six month limited warranty applies to sensors and
cables). If it should become necessary to return the instrument for
service during or beyond the warranty period, contact the Customer
Service Department at [phone] ext. 210 for authorization or
visit our website www.extech.com for contact information. A Return
Authorization (RA) number must be issued before any product is
returned to Extech. The sender is responsible for shipping charges,
freight, insurance and proper packaging to prevent damage in transit.
This warranty does not apply to defects resulting from action of the
user such as misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or unauthorized
modification. Extech specifically disclaims any implied warranties or
merchantability or fitness for a specific purpose and will not be liable
for any direct, indirect, incidental or consequential damages. Extech's
total liability is limited to repair or replacement of the product. The
warranty set forth above is inclusive and no other warranty, whether
written or oral, is expressed or implied.

480403 V1.0 6/074
Meter Description
1. L1 test Lead input to meter
2. L3 test lead input to meter
3. L2 test lead input to meter
4. L1 status LED
5. Orientation symbol for non-
contact testing
6. L3 status LED
7. L2 status LED
8. Power ON status LED
9. ON button
10. Left/Right Clockwise/Counter-
Clockwise status LEDs
11. Test lead alligator clips
Operation
Determine Phase Rotation Direction
1. Connect the supplied color-coded test leads to the meter’s test lead
input jacks at the top of the meter.
2. Connect the test probes to the three mains phases for the system
under test.
3. Press the ON/OFF button to turn the meter on.
4. L1, L2, and L3 indicators will illuminate for each phase connected,
respectively.
5. The clockwise and counter-clockwise arrows with the left/right ‘L’ or
‘R’ icons display the phase rotation direction (phase sequence) of
mains as connected.
6. To understand the status of a test, based on the condition of the
meter’s front panel LEDs , refer to the table printed on the meter:
Note: The rotational indicator LEDs illuminate even if one of the test
probes is connected to a neutral or ground conductor instead of one
of the mains phases.

480403 V1.0 6/075
Check Motor Turn Direction (contact method)
1. Connect the supplied color-coded test leads to the meter’s test
lead input jacks at the top of the meter.
2. Connect the test (alligator) probes to the three motor connections
(L1 to U, L2 to V, and L3 to W).
3. Press the ON/OFF button. The green ON indicator shows that the
instrument is ready for testing.
4. Turn the motor shaft half of a revolution towards the right.
5. The clockwise and counter-clockwise arrows with the left/right ‘L’
or ‘R’ icons display the orientation of the motor.
Check Motor Turn Direction (non-contact method)
1. Disconnect the test leads from the meter and from any other
devices under test.
2. Hold the meter close (one
inch or closer) to the motor,
parallel to the length of the
motor shaft.
3. The bottom of the meter
should face the drive shaft
and the back of the meter
should be flush with the motor
(refer to diagram at right).
Note: There is an orientation
symbol on the meter to assist.
4. Press the ON/OFF button. The green ON indicator shows that the
instrument is ready for testing.
5. The orientation of the motor is represented by the clockwise and
counter-clockwise arrows with the left/right ‘L’ or ‘R’ icons display.
Face the rear of the motor (meter will appear upside down) when
reading the status of the display LEDs.
Note: The meter will not operate with motors controlled by
frequency converters.

480403 V1.0 6/076

Support line [phone]
Technical Support: Extension 200; E-mail: [e-mail]
Repair & Returns: Extension 210; E-mail: [e-mail]
Product specifications subject to change without notice
For the latest version of this User Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Road, Waltham, MA 02451
Magnetic Field Detection
1. Hold the meter in the area under test.
2. A magnetic field is present if either the clockwise or the counter-
clockwise LED illuminates.
Battery replacement
The meter uses a 9V battery (supplied) as a power source. If the green
LED does not light when the ON/OFF button is pressed, replace the
battery.
1. Place the meter on a clean, flat, non-abrasive surface.
2. Loosen the rear bottom Phillips head screw to access the
battery compartment.
3. Lift the battery access door and replace the 9V battery observing
polarity.
4. Place the battery carefully in the compartment without crimping
the black and red battery connecting wire.
5. Close the access door and secure the screw.
Calibration and Repair Services
Extech offers repair and calibration services for the products we
sell. Extech also provides NIST certification for most products. Call
the Customer Care Department for information on calibration services
available for this product. Extech recommends that annual
calibrations be performed to verify meter performance and accuracy.
Copyright ©2007 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any form.

480403 V1.0 6/077
Specifications
Environmental Specifications
Operating Temperature 32 to 104oF (0 to 40oC)
Operating Humidity 15 to 85% relative humidity
Operating altitude 2000m
Pollution Degree 2
Approvals DIN / VDE 0411
IEC 61010
DIN / VDE 0413-7
Mechanical Specifications
Dimensions (H x W x D): 5.1 x 2.7 x 1.3”
(130 x69 x 32mm)
Weight 4.6 oz. (130g)
Safety Specifications
Electrical Safety Approvals IEC 61010/EN61010,
IEC 61557-7/EN 61557-7
Maximum Operating Voltage (Ume) 400 V
Protection Levels CAT lll, 300V to ground
Electrical Specifications
Battery type 9V battery
Current Consumption 20mA max.
Battery life One (1) year minimum
Nominal Voltage 120 to 400 VAC
Frequency Range (fn) 2 to 400Hz
Nominal Test current (in per phase) < 3.5mA