User's Manual
Phase Rotation Tester
Model 480300
Introduction
Congratulations on your purchase of Extech’s Phase Rotation Tester. This professional
meter, with proper care, will provide years of safe reliable service.
Specifications
Signal Input Voltage
Signal Frequency Range
Circuit Structure
Operating Temperature
Operating Humidity
Fuse Rating
Power Supply
Power Consumption
Dimension
Weight
Standard Accessories
100VAC up to 660VAC max., 3 minute limit over 500VAC.
45 to 70 Hz.
All electronic
0oC to 50oC (32oF to 122oF)
Less than 90% RH.
250mA / 250V
Uses connection to external equipment for power
approx. 7mA @ 500V.
3.9 x 1.9 x 1.0” (100 x 50 x 25mm)
0.33 lbs. (150g)
40cm test leads with alligator clips and Instruction Manual
Operation
The Phase Rotation function determines if the 3 phases are live and the
direction a motor will turn if connected as indicated in Table 1 below.
1.
2.
3.
4.
5.
Connect the three test leads to the 3 phase AC power source
Observe that all three lights (L1, L2, L3) are active
Observe the directional indication lights.
If the direction indicated is counter-clockwise, reconnect any
two wires until the clockwise indicator is lighted.
If the clockwise indicator is lighted, label the power source
"L1, L2, L3" (R, S, T)
L1 L2
R S
L3
T
480300
Ver. 1.5
4/01
3 Phase Tester Indication Table
Direction
Clockwise
Table 1
3 Phase Tester Indication
Indication
L1
L2
L3
Counter Clockwise
L1 No Connection
L2 No Connection
L3 No Connection
Light ON =
Light OFF =
Fuse Replacement
1. Replace the fuse when the indicators fail to light.
2. Open the case and replace the 250mA / 250V fuse.
3. Reinstall the case.
Calibration and Repair Services
Extech offers complete repair and calibration services for all of the products we sell. For
periodic calibration, NIST certification or repair of any Extech product, call customer
service for details on services available. Extech recommends that calibration be performed
on an annual basis to ensure calibration integrity.
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 on 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 (781) 890-7440 ext. 210 for authorization. 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.
Copyright
©
2001 Extech Instruments Corporation. All rights reserved
including the right of reproduction in whole or in part in any form.
Tech Support Hotlines
781-890-7440 ext. 200
extech@extech.com
www.extech.com
480300
Ver. 1.5
4/01
京公网安备 11010802033920号
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