User guide for emf meter TM195 - Measuring instruments in Malaysia
Contents
1. been selected to expressed in units of electrical and magnetic field strength and power density e At high frequencies the power density is of particular significance It provides a measure of the power absorbed by a person exposed to the field This power level must be kept as low as possible at high frequencies e The meter can be set to display the instantaneous value the maximum value measured or the average value Instantaneous and maximum value measurements are useful for orientation e g when first entering an exposed area e For isotropic measurements of electromagnetic fields e Non directional isotropic measurement with three channel measurement sensor e High dynamic range due to three channel digital results processing Configurable alarm threshold and memory function Easy amp safe to use Low battery detector Over load indication OL RF three Axle Sensor Liquid crystal LCD MAX AVG R Button Record Time L Button Power Button UNIT ENTER switch Button Hold Up Button Backlight Set XYZ MEM Down Button Tripod mounting screw Battery cover j fA 2 3 4 5 6 Te 8 9 1 1 oO EN 5 EN 6 LCD description HOLD MAX AVG ALARMES De MEL XY Zo unmwWicm un Avie e SCC taser wed ree SEEEN 408 o Tg Ee Da amp 2o 1 Primary Display 13 E symbol 2 Hold symbol 14 Auto power off symbol2. 3 Analogue bar graph 15 Time unit month day 4 MAX symbol hour minute second 5 AVG symbol 16 MEM reading symbol 6 Low battery symbol 17 SET symbol 7 x1x10x100 unit 18 REC symbol 8 X Y Z unit 19 CAL symbol 9 ALARM unit 20 Secondary Display 10 mV m V m E 21 BUZZER symbol 11 A m mA m unit H 22 Decimal point 12 W m uW em unit EN 7 8 Specifications 8 1 General specifications Display type Liquid crystal LCD 4 1 2 digits maximum reading 19999 Measurement method Digital triaxial measurement Directional characteristic Isotropic triaxial Measurement range selection one continuous range Display resolution 0 1mV m 0 1uA m 0 001uW m2 0 001 uW cm2 Setting time typically 1 5s 0 to 90 measurement value Sample rate 3 times per second Audible alarm Buzzer Units mV m V m A m mA m uW m2 mW m2 uW cm2 Display value Instantaneous measured value maximum value average value or maximum average value Alarm function adjustable threshold with ON OFF Calibration factor CAL adjustable Manual data memory and read storage 200 data sets Batteries 9V NEDA 1604 IEC 6F22 or JIS 006P Battery life Approximate 15 hours Auto power off Default time 15 minutes Adjustable threshold 0 99 minutes Operating temperature range 0 C to 50 C Operating humidity range 25 to 75 RH Storage temperatures range 10 C to 60 C Storage humidity range 0 to 80 RH Dimensions 60
3. L 60 W 195 H mm Weight including battery Approx 200g Accessories User s manual 9V battery Carrying case EMC This tester was designed in accordance with EMC Standards in force and its compatibility has been tested in accordance with EN61326 1 2006 EN 8 8 2 Electrical specifications e Unless otherwise stated the following specifications hold under the following conditions e The meter is located in the far field of a source the sensor head is pointed towards the source e Ambient temperature 23 C 3 C e Relative air humidity 25 75 Sensor type electrical field E e Frequency range 50MHz 3 5GHz e Specified measurement range e CW signal f gt 50MHz 0 01V m 20 0 V m e 0 1mA m 532 6mA m 0 01W m 106 94mW m e Dynamic range Typically 75dB e Absolute error at 1V m and 2 45GHz 1 0 dB 12 Frequency response e Sensor taking into account the typical CAL factor e 2 4dB 50 MHz to 1 9 GHz e 1 0 dB 1 9 GHz to 3 5GHz e Isotropy deviation Typically 1 0 dB f 2 45GHz e Overload limit 0 42 mW cm 11 V m per axis e Overload limit 0 to50 C 0 2dB EN 9 8 3 Units of measurement The meter measures the electrical component of the field the default units are those of electrical field strength mV m or Vim The meter converts the measurement values to the other units of measurement i e the corresponding magnetic field strength units uA m or mA m and power de
4. TENMARS RF three Axle Field Strength Meter TM 195 User s Manual RF three Axte Field Strengt CE HB2TM1950003 WN ONO 10 11 12 13 14 15 16 17 18 Table of Contents ipaa T o n g AONA a E E E EEEE AT Simple a method of operation Fundamentals 3 1 Electric field strength E 3 2 Magnetic field strength H 3 3 Power density S 3 4 The characteristic of electromagnetic fields Application Features Identifying Parts LCD description Specifications 8 1 General specifications 8 2 Electrical specifications 8 3 Units of measurement 8 4 Result modes ODOANDNARWWNHNNDND Measurement Procedures and Preparation 11 9 1 POWER button 11 9 2 Data hold button 11 9 3 Units button m 9 4 MAX AVG Record 0 0 0 AZ 9 5 Manual data memory storing 12 9 6 Backlight Display and Reading in The Dark 12 9 7 XYZ CALL 13 9 8 Alarm ON O etup 13 9 9 Viewing Data Records 9 10 Clock LCD Display Setup Mode 10 1 Clock Setup 1 10 2 Setting the alarm limit value ALARM 2 10 3 DEL data logger memorysetup 3 10 4 Analogue bar graphsetup 4 10 5 Auto Power Off Time function setup 5 10 6 Setting the calibration factor CAL 6 Making measurements Short term measurements Long term exposure measurements SAFETY INFORMATION SAFETY INFORMATION Battery replacement Safety Precaution End o
5. X100 setup 4 Auto Power Off Time setup 5 Setting the calibration factor CAL 10 1 Clock Setup 1 Press hold button and press E gt button first to enable Clock Setup This meter clock is 24 hour time setting ae Use or 4 to change digit Hour gt day gt Month year gt Minute Use Sc or D to select the digit you want to adjust Press button to save the setting Date Time default format 2009 12 21 12 12 Year format 2000 2099 display as 00 99 wy 306 aa OF Hat that th DEAR ROOS ere DII I5 10 2 Setting the alarm limit value ALARM 2 The alarm limit value is used to monitor the display value automatically It controls the alarm indication function The alarm limit value can be edited in the displayed V m unit The ALARM setting range is from 0 001 to 999 9V m ALARM default is set at 999 9V m Alarm limit function is only used for total three axial value comparator Press and hold on button and press enter Setup Mode then press button 1 more time to enter the alarm setting mode the V m unit is flashing displayed Press QB key to move decimal Press key to select the desired setting value Press and amp button to change digit Press S key to store the new setting value and exit 10 3 DEL data logger memorysetup 3 Press and hold on button and press gt button to enter Setup Mode Press butt
6. et cloth solvents or water etc e Operation Altitude Up to 2000M e Operating Environment Indoors use This instrument has been designed for being used in an environment of pollution degree 2 18 End of life Caution this symbol indicates that equipment and its accessories shall be subject to a separate collection and correct disposal EN 22
7. f life Axis RF Meter Quick Start Guide This meter has many capabilities including memory alarm date time average etc which will require some study of the manual to use properly However you can quickly and easily begin making measurements right out of the box Just follow these simple ste ps 1 insert 9V battery 2 turn meter on with GREEN button 3 press XYX MEM button until all three XYZ letters are displayed on the screen to the left of the main number 4 press UNIT ENTER button until the desired units are displayed below the main number we recommend using mV m and we recommend a maximum level of 614 mV m for prolonged exposure You are now ready to make your first measurements 1 Introduction This meter is designed for measuring and monitoring Radio Frequency electromagnetic field strength The meter is calibrated precisely over the frequency range of 50Mz 3 5 GHZ 2 Simple a method of operation Press button to power on To change measuring unit mV m push button to change the unit Electric field strength V m Computed magnetic field strength mA m Computed power density mW m Computed power density uWicm Press this key to change sensor axis selector All axis gt X axis gt Y axis gt Z axis 3 Fundamentals Electromagnetic pollution This meter is used to indicate electromagnetic pollution generated artificially Wherever there is a voltage or a curren
8. in Press button to power off 9 2 Data hold button Press the button to go into hold mode and HOLD appears on the screen to allow you to read the data Press this button once again to deactivate it ead Vow ond oO ADO E8 XYZ Vim oDDD 9 3 Units button Change units with the UNITS key as follows Electric field strength V m Computed magnetic field strength mA m Computed power density MW m Computed power density uW cm Press button and push ED outon to change the unit Possible units mV m V m A m mA m uW m mW m uW cm EN 11 mt Tila DU AAA DALA XYZ woven X Z choo oho 9 4 MAX AVG Record Press BQ key to switch to the next display The display switches from MAX to AVG to MAX AVG and back to MAX CELE REE EEE EE MEET eng eng cage agg 99 Press and hold key for 3 seconds to disable this function The maximum storage is up to 99 minutes and 99 seconds After this period of time updating will be completed automatically and then the LCD displays a 9 5 Manual data memory storing Push button the meter will save the current measured result and REC with a number 001 200 will appear Manual data memory storing 200 data sets Over load indication OL rut 4 rs m REC ght G REC Le REC DN 9 6 Backlight Display and Reading in The Dark Press key backlight light on Again Press amp button to po
9. me cases Observe the local safety regulations of the facility operation Observe the operating instructions for equipment which is used to generate conduct or consumer electromagnetic energy Be aware that secondary radiators e g reflective objects such as a metallic fence can cause a local amplification of the field 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 leak in wave guides inductive ovens Field strength measuring device can underrate pulsed signals Particularly with radar signals significant measurement errors can arise 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 you should thus be certain that all field components to be measured lie in the specified frequency range of the measuring device EN 21 16 Battery replacement AN WARNING If the symbol appears on the LCD please replace the battery immediately Turn off the instrument Remove the battery cover Replace the battery Install the battery cover 17 Safety Precaution e For cleaning the instrument use a soft dry cloth Never use a w
10. n we are usually in the near field If the distance is more than three wavelengths the far field conditions usually hold In near field conditions the magnetic field value cannot be calculated from the electric field value This meter is designed for reliable far field measurements only EN 3 4 Application Quite often routine maintenance and service work has to be done in areas where active electromagnetic fields are present e g in broadcasting stations etc Additionally other employees may be exposed to electromagnetic radiation In such cases it is essential that personnel be not exposed to dangerous levels of electromagnetic radiation such as High frequency RF electromagnetic wave field strength measurement Mobile phone base station antenna radiation power density measurement Wireless communication applications CW TDMA GSM DECT RF power measurement for transmitters Wireless LAN Wi Fi detection installation Spy camera wireless bug finder Cellular Cordless phone radiation safety level Microwave oven leakage detection Personal living environment EMF safety EN 4 5 Features 6 Identifying Parts The meter is a broadband device for monitoring high frequency radiation in the range from 50MHz to 3 5GHz e The non directional electric field antenna and high sensitivity also allow measurements of electric field strength in TEM cells and absorber rooms e The unit of measurement and the measurement types have
11. nsity units uW m mW m or uW cm using the standard far field formulate for electromagnetic radiation The conversion is invalid for near field measurements as there is no generally valid relationship between electrical and magnetic field strength in this situation Always use the default units of the sensor when making near field measurements 8 4 Result modes The bar graph display always shows the instantaneous measured dynamic range value The digital display shows the result according to one of three modes which can be selected Instantaneous The display shows the last value measured value measured by the sensor no symbol is displayed Maximum instantaneous MAX The digital display shows the highest instantaneous value measured the MAX symbol is displayed Average AVG The digital display shows the average value measured the AVG symbol is displayed Instantaneous mode is the default setting when the meter is turned on The following graph shows of Instantaneous actual MAX hold AVG and MAX AVG Field strengi EN 10 9 Measurement Procedures and Preparation Battery loading Remove the battery cover on the back and put a 9V battery inside Battery replacement When the symbol of EF appears on the LCD display the battery should be replaced with a new one The battery symbol will be displayed on the LCD this is a battery low indicator 9 1 POWER button Press button to power on Aga
12. of possible radiation sources Apart from active sources those components connected to a source may also act as radiators For example the cables used in diathermy equipment may also radiate electromagnetic energy Note that metallic objects within the field may locally concentrate or amplify the field from a distant source EN 19 13 Long term exposure measurements Location Place the meter between yourself and the suspected source of radiation Make measurements at those points where parts of your body are nearest to the source of radiation Note Use the Average or Max average modes only when the instantaneous measurement values are fluctuating greatly You may fix the meter to a wooden or plastic tripod 14 SAFETY INFORMATION CAUTION Before making a measurement check if the low battery symbol is shown on the display as soon as the meter is switched on Change the battery if the symbol is displayed In the case of prolonged storage it is preferable to remove the battery from the meter Avoid shaking the meter particularly in the measurement mode The specified limits outside and improper handling may adversely affect the accuracy and function of the meter EN 20 15 SAFETY INFORMATION DANGER In some cases work in the vicinity of powerful radiation sources can be a risk of your life Be aware that persons with electronic implants e g cardiac pacemakers are subject to particular dangers in so
13. on 2 more times to enter clear data logger memory mode 3 SET ro Press key in the display 588 Press CED key Will exit and not clear memory EN 16 rene Press key to display DAR Press without clearing the data 10 4 Analog bar graph setup 4 button to enter Press hold button and press Setup Mode Press button 3 more times to Analogue bar graph setting mode The graph unit is flashing displayed X1 gt X10 gt X100 na to select the desired setting value AMANIN UNH ZH xo G Press key to store the new setting value and exit 10 5 Auto Power Off Time function setup 5 If you want to disable auto power off please hold button and press button to enter Setup Mode button 4 more times Press O and button to change digit Set value to 00 to disable auto power off Press Sie a Press key to store the new setting value and exit the symbol is displayed Maximum auto power off time 00 99 minutes Auto power off time default setting is 15 minutes on I z 0608 set o tao 29 EN 17 10 6 Setting the calibration factor CAL 6 please hold button and press button to Setup Mode press button 5 more times to turn on the meter to enter the calibration factor The CAL setting range is from 0 10 to 9 99 Press and button to change digit Use S or to select the desi
14. red setting value on the meter to enter the calibration factor setting mode the CAL SET marks is displayed key to store the new setting value and exit Ty ee ee DAN LAA bee AAA Calibration factor CAL The calibration factor CAL serves to calibrate the result display The field strength value measured internally is multiplied by the value of CAL that has been entered and the resulting value is displayed The CAL setting range is from 0 10 to 9 99 The CAL factor is often used as a means of entering the sensitivity of the field sensor in terms of its frequency response in order to improve measurement accuracy EN 18 11 Making measurements Important The following effect will be noted with all field strength meters If the sensor is moved quickly excessive field strength values could be displayed This effect is caused by electrostatic charges Recommendation Hold the meter steady during the measurement 12 Short term measurements Application Use either the instantaneous or the Max instantaneous mode if the characteristics and orientation of the field are unknown when entering an area exposed to electromagnetic radiation Procedure Hold the meter at arm s length Make several measurements at various locations around your work place or the interested areas as described above This is particularly important is the field conditions are unknown Pay special attention to measuring the vicinity
15. t electric E and magnetic H fields arise All types of radio broadcasting and TV transmitters produce electromagnetic fields and they also arise in industry business and the home where they affect us even if our sense organs perceive nothing 3 1 Electric field strength E A field vector quantity that represents the force F on an infinitesimal unit positive test charge q at a point divided by that charge Electric field strength is expressed in units of volts per meter mV m This meter measures electric field strength directly 3 2 Magnetic field strength H A field vector that is equal to the magnetic flux density divided by the permeability of the medium Magnetic field strength is expressed in units of amperes per meter A m In far field situations one can calculate the magnetic f ield for the electric EN 2 field value This meter can display the calculated magnetic field strength 3 3 Power density S Power per unit area normal to the direction of propagation usually expressed in units of watts per square meter W m or for convenience units such as mill watts per square centimeter mWicm 3 4 The characteristic of electromagnetic fields Electromagnetic fields propagate as waves and travel at the speed of light C The wavelength is proportional to the frequency A wavelength C speed of light f frequency If the distance to the field source is less than three wavelengths the
16. wer off Backlight light turns off automatically after 30 seconds EN 12 9 7 XYZ CALL this key to change sensor axis selector All axis gt Yiaxis Z ays DALADALA LA IA LAJA g ag wo eB 9 8 Alarm ON OFF Setup Press hold and key to switch the alarm function on The ALARM symbols in the display indicates that the alarm oa and key to turn off the alarm function When the Alarm sounds the display shows om function is on Press hold XY Zai Mimis BBa 9 9 Viewing Data Records Press hold button and press button to view the saved data records Do O i or button to see the next or previous records Press GPx to close the setup exit the mode Use z nm Ot Onn Au ARA AAD mim EN 13 9 10 Clock LCD Display Press hold and button to select the display method of the Year Month Date hour and Second This meter s clock uses 24 hour time setting Default time mode setting is 2010 01 07 00 02 00 Lae IT ae a a ea Be EN 14 10 Setup Mode Press hold button and mode button to enter the setup Press gt button to change the setup function Setup function see Note1 Push button to save setup data Note1 you can set up 6 different functions in setup mode Clock Setup setup 1 Setting the alarm limit value ALARM setup 2 Clear data logger memory setup 3 Analogue bar graph X1 X10
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