Extech Instruments EMF450 User Manual

EMF450-en-GB_V1.4 7/17
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Display description
1. Data Hold
2. Auto power off (APO)
3. Audible alert
4. Battery status
5. Magnetic Field bargraph
6. Magnetic Field digital reading
7. XYZ axes values
8. Electric Field bargraph
9. Electrical Field digital reading
10. RF strength bargraph
11. RF strength histogram display
12. Select
13. Menu
14. Hold / Enter
15. RF electronic field color alert*
16. RF strength digital reading
17. RF Strength indication area
18. LF Electrical field color alert*
19. Electrical field indication area
20. LF electromagnetic field color alert*
21. Magnetic field indication area
*Color Coded Alert Table (for reference purpose only) see items 16, 19, and 21 above.
Magnetic Fields
Electrical Fields
RF Strength
Low 0~10.00mG 0~500V/m 0~0.99mW/m
2
(0~0.59V/m)
Medium 10.01~100mG 501~1000V/m 1~9.99 mW/m
2
(0.6~1.9V/m)
High
101~2000mG
>1001V/m
>10 mW/m
2
(>2V/m)
Note: Alarm beeper sounds when readings enter the red region.
Conversions
1W/m² = 0.1mW/Cm² = 100μW/Cm². 1mW/m² = 0.1μW/Cm²
Figure 2 – Display Description

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”)