Extech Instruments 480303 User manual

480303 Ver. 1.4 9/03
User's Guide
Motor Rotation and 3-Phase Tester
Model 480303
Introduction
Congratulations on your purchase of Extech’s Motor Rotation and 3-Phase Tester. This
professional meter, with proper care, will provide years of safe reliable service.
Controls and Indicators
1. Motor Rotation Test Terminal
2. Power Indicator
3. Power Button
4. Clockwise Indicator
5. Counter Clockwise Indicator
6. 3-Phase Rotation Tester Input
7. 3-Phase Rotation Indicator
Operation
Phase Sequence Function
The Phase Sequence function determines if the 3 phases are live and the direction a motor
will turn if connected as indicated in Table 1.
1. Connect the three test leads to the power source
2. Observe that all three lights (L1, L2, L3) are active
3. Observe the directional indication lights.
4. If the direction indicated is counter-clockwise, reconnect any two wires until the
clockwise indicator is lighted.
5. If the clockwise indicator is lighted, label the power source "L1, L2, L3"
Motor Rotation Function
1. Make sure there is no voltage present.
2. Insert the test leads into the input terminals:
3. L1 - Black, L2 - Red, L3 - White. Attach the
other ends of the leads to the 3 phase motor.
4. Press and Hold the power button. The green
power indicator will light up.
5. Rotate the motor shaft clockwise (as viewed
from the end of the shaft). If the red clockwise
indicator is lit the 3-phase motor will rotate
clockwise if connected to the power supply
by the L1-L2-L3 sequence.
6. Rotate motor shaft counter-clockwise. If the
red counter-clockwise indicator is lit the 3-
phase motor will rotate clockwise if
connected to the power supply by the L1-L2-
L3 sequence.
7. If you want the motor to rotate counterclockwise, change the order of the connections to
L2-L1-L3 and the motor will rotate counter-clockwise.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com

Specifications
Signal Input Voltage 100VAC up to 660VAC max., 3 minute limit for over
500VAC. (3 phase Indicator only)
Signal Frequency Range 45 to 70 Hz
Operating Temperature 32ºF to 122ºF (0ºC to 50ºC)
Operating Humidity Less than 90% RH
Power Supply 006P DC9V battery
Power Consumption Consumption current approx. 14mA for motor rotation
field tester and 7mA per phase for rotation field indicator
Dimension 5.9 x 3.4 x 1.6” (150 x 85 x 40mm)
Weight 0.5 lbs. (230g ) without battery
Standard Accessories Test leads (red, black & white) and Instruction Manual
Maintenance
Battery Replacement
1. Replace the battery when green indicator becomes dim.
2. Open the battery cover with flat screwdriver or coin.
3. Replace the battery (006 DC9V) and reinstall the battery cover
Fuse Replacement
1. Replace fuse when red indicators fail to light.
2. Open the case and replace the 0.2A fuse.
3. Reinstall the case.
Warranty
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
FAX [phone] - TestEquipmentDepot.com