Extech Instruments 480403 User Manual

480403 V1.0 6/07 4
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.

Extech Instruments 480403 Specifications

Operating Environment

operating temperature	32 to 104°F (0 to 40°C)
operating humidity	15 to 85% relative humidity
operating altitude	2000 m

Power

battery type	9V battery
current consumption	20 mA max
battery life	One year minimum

Electrical Specifications

nominal voltage	120 to 400 VAC
frequency range	2 to 400 Hz
nominal test current per phase	< 3.5 mA

Weight and Dimensions

dimensions	5.1 x 2.7 x 1.3 inches (130 x 69 x 32 mm)
weight	4.6 oz (130 g)
maximum operating voltage	400 V