Extech Instruments EMF450 User Manual

USER MANUAL

Multi-Field EMF Meter

Model EMF450

Additional User Manual Translations available at www.extech.com

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Safety Information

CAUTIONS

• Before making a measurement, check if the low battery symbol is shown on the display

when the meter is switched on. Replace the battery if the symbol is displayed.

• In the case of prolonged storage, remove the battery from the meter to prevent damage.

• Do not expose this device to direct sunlight or to extreme temperatures and humidity.

• The accuracy and function of the meter may be adversely affected if the specified limits are exceeded or if

the meter is handled improperly.

• Clean the device with a soft, dry cloth. Moisture can damage the meter.

• Electric field measurement precautions: Perform tests according to the indicated directions.

WARNINGS

• Use caution when working in the vicinity of powerful radiation sources.

• Persons with electronic implants (e.g. cardiac pacemakers) should avoid powerful radiation sources.

• Observe all relevant safety regulations.

• Carefully read the operating instructions for equipment generating or conducting electromagnetic

energy that will be measured.

• Do not operate near combustible gases or in damp environments.

• Be aware that the field strength in the near vicinity of radiators increases proportionally to the inverse

cube of the distance. This means that enormous field strengths can result in the immediate vicinity of
small radiation sources (e.g. leaks in waveguides or inductive ovens).

• Field strength measurement devices can underrate pulsed signals, particularly with radar signals, in which

case significant measurement errors can result.

• All field strength measuring devices have a limited specified frequency range. Fields with spectral

components outside of this frequency range are generally incorrectly evaluated and tend to be
underrated. Before using field strength measuring devices be certain that all field components to be
measured lie in the specified frequency range of the measuring device.

• For indoor use; Pollution level II

• Operating altitude below 2000’ (6562’)

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Introduction

This meter simultaneously measures and displays Magnetic Field, Electric Field, and RF Strength.
The unit of measurement and the measurement types are expressed in units of electrical and
magnetic field strength and power density. This meter is ideal for EMF measurements of power
lines, electrical appliances, industrial devices, cell phones, base stations, and microwave leakage.
This device is shipped fully tested and calibrated and, with proper use, will provide years of
reliable service. Please visit our website (www.extech.com) to check for the latest version of this
User Guide, Product Updates, Product Registration, and Customer Support.

Features

• Data hold (HOLD)

• Overload display “OL”.

• Brightness options: low-medium-high

• Selectable Auto Power off (APO) Time: 1; 3; 5; 10; 15; 30 minutes

• Key press Sounds / Alarm Sounds: On

; Off with programmable tone selections

• Information screen shows software version

• Languages: English, Traditional Chinese, Simplified Chinese, Japanese, Spanish

• Magnetic units selection：Gauss (mG) or Tesla (μT)

• Electric field strength: V/m

• RF Strength Units selection: (μW/m² ~mW/m²) (μW/cm²) (m V/m ~V/m) (mA/m) (dBm).

• Low-Frequency EMF Readings: Individual and aggregated XYZ axial readings:

• High-frequency EMF Readings

• RF Historical Records; up to 20 groups.

• Low battery indication： HIGH LOW