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Magnetic Field Meter
TM-191A
HB2TM191A000
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Table of Contents
1 Introduction............................................... 1
2 Application ................................................ 1
3 Features.................................................... 2
4 Identifying Parts........................................ 2
5 Measurement Procedures......................... 3
6 Specifications............................................ 5
7 Battery replacement.................................. 6
8 Safety Precaution...................................... 6
9 End of life.................................................. 6
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TM-191A
1 Introduction
Safety precautions should betaken against electric
appliances inplaces includingmedical institutions,
schools andresidential districts, where people usually
stay fora long time, to prevent patients, babies and senior
citizens fromexposure tohigh electromagnetic waves.
An electromagnetic wave simply meansthe wave motion
of theelectromagnetic field(EMF).
The changein electricfields producesmagnetic fields,
and thechange inmagnetic fieldscan also generate
electric fields. The fluctuation of correlation betweeneach
other isknown as“electromagnetic waves",which is a
form ofenergy similarto light and heat that can be
transmitted eitherby radiation inthe air or by an electric
conductor.
It issuggested that rearrangements should bemade in
families andwork locationswhere electromagnetic fields
are detectedthe strongestin orderto avoid prolonged
exposure to excessive electromagnetic fields.
2 Application
This meter is applied to measuring electromagnetic
fields ofextremely lowfrequency (ELF) of 30 to 300Hz.
It is capable of measuring the electromagnetic field
radiation intensity thatis producedfrom electric
transmission equipment, power line, microwave oven,
air conditioner, refrigerator, computer monitor,
video/audio device andso forth.
The magnetic field unit is Tesla (T), Gauss (G),
mini-Gauss (mG) or micro-Tesla (μT).
1 T＝10,000G 1 G＝1,000mG
1μT＝10 mG
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TM-191A
3 Features
Switch between the display of micro-Tesla and
mini-Gauss is available.
Data hold (HOLD)、maximum (MAX) Hold function.
Range display(20,200,2000).
Low battery detector “ ”.
Over load display “OL”.
4 Identifying Parts
1.Sensor position.
2.LCD
3.Power on/off.
4.maximum hold button
5.Data hole button
6.mG unit select button
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TM-191A
7.µT unit select button
8.Range select button
9.Battery cover.
5 Measurement Procedures
Press to power on.
Select forµT unit or for mGunit.
Position the front (refer to Figure 1) of the meterto
measure the electromagnetic waves. Tryto changethe
measurement angle or position forobtaining the highest
reading value(please referto Figure 2to 6).
Read the measured value. The display of “OL” onthe
left highest positionindicates thereis an overload on
the reading. Please press to select a higher range
for measurement again.
Due to the environmental magnetic field factors, this
magnetic fieldmeter coulddisplay areading value that
is lowerthan 0.5mGprior to measuring. This is not a
malfunction of the device.
To permanently lock and keep the reading displayed on
the LCD, press or press again to unlock.
To retain the maximum value, press and the
reading valuedisplayed onthe LCDwill keep updating
to themaximum value.
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TM-191A
Figure 1 indicate the correct measurement direction of
the electromagnetic wave.
Figure 2, 3, 4, 5and 6 indicate the incorrect
measurement direction of theelectromagnetic wave.
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TM-191A
6 Specifications
Display: 3-1/2 digits LCD, maximum reading 1999.
Range: 200/2000 mG,20/200µT.
Resolution: 0.1/1 mG or 0.01/0.1 µT.
Frequency response: 30Hz to 300Hz.
Sensor: Single Axis
Accuracy: ±(2.5%±6dgt) at 50Hz/60Hz.
Over load: LCD display “OL”.
Sample rate: 2.5 times per second.
Battery: 9V NEDA 1604, IEC 6F22 or JIS 006P.
Battery life: Approximate 100 hours.
Operating temperature & humidity: 5°C to
40°C,below 80% RH.
Storage temperature & humidity: -10°C to 60°C, below
70%.
Weight: About 170g.
Dimensions: 140(L)*65(W)*37.5(H)mm.
Accessories: User’s manual, 9V battery, Carrying
case.
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TM-191A
WARNING
please replacethe battery immediately
7 Battery replacement
If thesymbol “ ” appears onthe LCD,
Turn off the instrument.
Remove the battery cover
Replace the battery.
Install the battery cover.
8 Safety Precaution
For cleaning the instrument use a soft dry cloth. Never
use a wet cloth,solvents or water, etc..
Operation Altitude: Up to 2000M.
Operating Environment: Indoors use. This instrument
has beendesigned forbeing usedin an environment of
pollution degree 2.
EMC: EN61326-1:CISPR 11:Group 1, Class B
Class B – Equipment for use in all establishments
other thandomestic.
Group 1 – RF energy generated isneeded for
internal functioning.
9 End of life
Note: This symbol indicates that the
meter andits accessoriesmust be
separated andprocessed properly.
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Professional Electrical and Environment
Test & Measurement Instruments:
LED light meter, Temperature &Humidity
meter,Infrared Thermometer, Sound level meter,
Light meter, EMF meter, UV Light meter, RF
meter, Hot wire Anemometer, Co
meter,Anemometer, Lan cable tester, Co2 meter,
Solar power meter, Radiation meter,
Clamp meter, Multimeter, Phase Rotation test,
Digital Insulation tester
Our products of high quality are selling
well all over the world
TENMARS ELECTRONICS CO., LTD.
6F, NO.586 Ruiguang Rd, Neihu Dist.
Taipei City, Taiwan
E-mail: [email protected]
http://www.tenmars.com
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