EXTECH 480823 DATA SHEET

User's Guide

Electromagnetic Field Meter

Model 480823

Introduction

Congratulations on your purchase of Extech’s Electromagnetic Field Meter, model 480823. This
battery powered meter measures and displays EMF in Gauss and Tesla units with a frequency
bandwidth of 30 to 300Hz. This professional meter, with proper care, will provide years of safe
reliable service.

Meter Description

1. LCD display

2. EMF Sensor

3. Power/Units switch

Note that the tilt stand and battery

compartment are located on the rear of the meter

1

2

3

Meter Operation

1. Place the “OFF/Tesla/Gauss” Switch to the Gauss or Tesla position.

2. Move the meter's sensor slowly toward the device under test and read the LCD indication. If the
LCD display is completely blank or if “LO BAT” appears on the left corner of the LCD, check the
9V battery (replace if necessary).

3. Notice that the field intensity reading increases as you move closer to a field.

4. Position the meter at different angles to the device under test and observe how this positioning
affects the EMF readings.

5. Record the highest reading obtained from the various reading positions.

6. If the device under test is off, the EMF tester reading should go to zero unless another source of
radiation is present.

7. If the meter’s display indicates a “1” on the left side of the LCD, an overload condition exists.
This indicates that the measured radiation is higher than the capability of the meter.

2

480823-EU-EN-V2.2-4/12