Extech Instruments 480823 Bedienungsanleitung

User's Guide

Electromagnetic Field Meter

Model 480823

Model 480823 V2.0 March 2005

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.

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects

in parts and workmanship for one year from date of shipment (a six month limited warranty

applies to sensors and cables). If it should become necessary to return the instrument for

service during or beyond the warranty period, contact the Customer Service Department at

(781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact

information. A Return Authorization (RA) number must be issued before any product is

returned to Extech. The sender is responsible for shipping charges, freight, insurance and

proper packaging to prevent damage in transit. This warranty does not apply to defects

resulting from action of the user such as misuse, improper wiring, operation outside of

specification, improper maintenance or repair, or unauthorized modification. Extech

specifically disclaims any implied warranties or merchantability or fitness for a specific

purpose and will not be liable for any direct, indirect, incidental or consequential damages.

Extech's total liability is limited to repair or replacement of the product. The warranty set

forth above is inclusive and no other warranty, whether written or oral, is expressed or

implied.

Specifications

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

with low battery and overload indication

Measurement rate Approx. 0.4 seconds

Maximum ranges and

resolution 20µTesla (0.01) and 200mGauss (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: 32 to 122oF (0 to 50°C)

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

Power source 9V Battery

Power consumption Approx. 3mA DC

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

Weight 0.36 lbs. (165g)

Model 480823 V2.0 March 2005

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. 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.

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.

Model 480823 V2.0 March 2005



Support line (781) 890-7440

Technical support: Extension 200; E-mail: support@extech.com

Repair & Returns: Extension 210; E-mail: [email protected]

Product specifications subject to change without notice

For the latest version of this User’s Guide, Software updates, and other

up-to-the-minute product information, visit our website: www.extech.com

Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451

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 as soon as

possible. 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.

Calibration and Repair Services

Extech offers repair and calibration services for the products we sell. Extech also

provides NIST certification for most products. Call the Customer Service Department for

information on calibration services available for this product. Extech recommends that

annual calibrations be performed to verify meter performance and accuracy.

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