Extech Instruments EMF450 Quick Start

Colour Alert Chart
Range/Colour Magnetic
Fields
Electrical
Fields
RF Strength
Low (Green) 0 to 10.00 mG 0 to 500 V/m 0 to 0.99 mW/m
2
Medium (Yellow) 10.01 to 100 mG 501 to 1000 V/m 1 to 9.99 mW/m
2
0.6 to 1.9 V/m
High (Red)
Alarm beeper
alert
101 to 2000 mG > 1001 V/m > 10 mW/m
2
> 2 V/m
Meter Power
The meter is powered by three 1.5 V AAA batteries (rear compart-
ment). Press the power button to power the meter, press the power
button for 3 seconds to switch off. Check the battery display icon
for battery status.
Data Hold
Press HOLD to freeze the reading on the display. The HOLD icon
will appear. Press HOLD again to exit.
Electric Field Measurements
The meter measures the electric field (electrical power) in the at-
mosphere. The sensor orientation is printed on the back of the me-
ter and is represented by the arrows in the figure, below. Perform all
tests according to the indicated direction of the electric field sensor.
Hold the meter at the bottom and at arm’s length.
#NAS100173; r. AC/94338/94343; en-US
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Extech Instruments EMF450 Specifications

General

Sensor Type	LF - Magnetic Fields, LF- Electric Field Sensor, RF Strength
Range	20mG /200mG /2000mG, 2µT /20µT /200µT, 50V/m to 2000V/m, 0.02µW/m² to 554.6mW/m²
Display resolution	0.02/0.1/1, 1V/m, 0.02µW/m², 0.2µA/m, 0.2mV/m, 0.002µW/cm², 2dB
Frequency range	50/60Hz, 50/60Hz, 50MHz to 3.5GHz
Accuracy	± (15% + 100 digits), ± (7% + 50 digits), ± 2dB at 2.45GHz
Display	4 digits Triple color TFT display
Sample rate	6 seconds
Sensors	Triple axes (XYZ) ELF and RF and Electric field sensor
Battery	Three (3) 1.5V alkaline batteries
Battery Life	Approx. 8 hours
Operating temperature and RH%	5°C~40°C (41°F ~104°F); < 80%RH
Storage temperature and RH%	-10°C to 60°C (14°F ~140°F); < 70%RH

Weight and Dimensions

Weight	Approx. 120g (4.2 oz.)
Dimensions	115 x 60 x 21mm (4.5 x 2.4 x 0.08”)