Extech Instruments 480823 Bedienungsanleitung

User Manual

Electromagnetic Field Meter

Model 480823

Additional User Manual Translations available at www.extech.com

480823-en-GB_V2.3 5/17

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

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. Readings are in either milli Gauss (mGauss) or micro Tesla (µTesla) depending on the switch

setting.

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

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

radiation is present.

8. 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.

480823-en-GB_V2.3 5/17

EMF Exposure

The effect of EMF exposure on humans and animals is a modern day concern. At the time of this

writing, to the best of our knowledge, no standards or recommendations exist regarding limits of

EMF exposure. Until evidence suggests that there is not a health risk associated with EMF

exposure, common sense would dictate that a practice of minimal exposure be exercised.

Battery Replacement

When the low battery message “LO BAT” appears on the left corner of the LCD, the 9V battery has

fallen to a critically low voltage level and should be replaced. The battery compartment cover is

located at the bottom rear of the meter. Slide off the battery compartment cover, change the battery,

and replace the compartment cover.

Never dispose of used batteries or rechargeable batteries in household waste.

As consumers, users are legally required to take used batteries to appropriate collection

sites, the retail store where the batteries were purchased, or wherever batteries are sold.

Disposal: Do not dispose of this instrument in household waste. The user is obligated to

take end-of-life devices to a designated collection point for the disposal of electrical and

electronic equipment.

Specifications

Display 13mm (0.5”) 3-1/2 digit (1999 count) LCD

with low battery and overload indication

Measurement rate

Approx. 0.4 seconds

Maximum ranges and

resolution 19.99µTesla (0.01)

199.9mGauss (0.1)

NOTE: 1 µTesla = 10 milli-Gauss

Accuracy ± (4% + 3 digits) @ 50/60Hz

Frequency bandwidth 30 to 300Hz (single axis measurements only)

Over-range indication “1___” is displayed

Operating

Temperature/Humidity Temperature: 0 to 50°C (32 to 122oF)

RH: 90% max. (0 to 35°C); 80% max. (35 to 50°C)

Power source

9V Battery

Power consumption Approx. 3mA DC

Dimensions 131 x 70 x 25mm (5.2 x 2.8 x 1”)

Weight 165g (0.36 lbs.)

ISO-9001 Certified

www.extech.com

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