Manual - Meco Instruments P.Ltd
Contents
1. 1 2GHz 2 01 1 4GHz 1 80 1 6GHz 1 37 1 8GHz 1 44 2GHz 1 42 2 2GHz 1 40 2 5GHz 1 46 4 4 4Alarm limit value ALM 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 smallest value that can be set to 0 05V m Alarm limit function is only used for total three axial value comparator 16 4 5 Setting the meter 4 5 1 Setting the units of measurement With the UNIT key as follows a Mannal data memory number c es H Wem m mW m TEE EEE a Electric field strength V m d m a b Computed magnetic field strength mA m c Computed power density mW m d Computed power density mW cm 4 5 2 Setting the result mode Instantaneous result mode is automatically set when the meter is turned on With the MAX AVG key as followings Instantaneous Max instantaneous Max average Average 17 4 5 3 Setting the alarm limit value ALM 1 Press key to turn off the meter 2 Press and hold on ALARM MODE key then press 1 key to turn on the meter The Alarm setting mode The units and four digits flashing which can be changed 3 Press MEM A or READ key to increase or decrease the value 4 Press MAX AVG key to store the new setting value and exit 18 4 5 4 Setting the calibration factor CAL Press2. 2 Press and hold this key while turning the meter on to 1 E field sensor enter the clear manually recorded data mode 3 In the manual data reading mode press this key to 2 LCD display read the next stored data 3 MAX AVG Keys 4 In the alarm setting mode press this key to increase 1 Press this key to change sequential Instantaneous the setting value Max instantaneous Average Max 8 READ Y key average 1 Press this key to switch to the manual data reading l mode Be TE E SE ERAR 2 Press and hold this key while turning the meter on to 3 In the alarm setting mode press this key to store the disable the auto power off function setting value 3 In the manual data reading mode press this key to 4 Press and hold this key while turning the meter on to read the previous stored data disable the audible sound Then the gj symbol will 4 Inthe alarm setting mode press this key to decrease 10 disappear the setting value i 9720 28 09 2012 4 2 LCD display description Soe 13 MAX AVG ymW cem pmA m mV m Menno D 14 XY Bat a Bah a Cal a al Tn m8 8E Auto power off function on off eni Displayed Audible sound function on off MAX Maximum measured value displayed MAX AVG Maximum average value displayed AVG Average measured value displayed Low battery indication Units mV m and V m Electric field strength A m and mA m Ma
3. Q key turn off the meter 2 Press and hold down MEM A and READ keys then press 1 key to turn on the meter the display then shows CA The Calibration factor setting mode There are four digits flashing which can be changed 3 Press MEM A or READ key to increase or decrease the value 4 Press MAX AVG key to store the new setting value and exit 4 5 5 Switching the alarm function on or off exceed limit value 1 Press ALARM MODE key for 2 seconds to switch the alarm function on or off The ALM and sa symbols in the display indicates that the alarm function is on 2 When the alarm function is on the display will show A if the instantaneous measured value exceed the limit value 4 5 6 Setting the audible sound function off disappears Power off 19 9720 28 09 2012 When the meter is normally turned on the audible sound function is on 1 Press key to turn off the meter 2 Press and hold MAX AVG key and turn on the meter again to disable the audible sound then the s symbol will disappear from the display 4 5 7 Setting the auto power off function off Auto power off symbol disappear Power off Hold on When the meter is normally turned on the auto power off function is on 1 Press key to turn off the meter 2 Press and hold READ key and turn on the meter again to disable the auto power off function the symbo
4. 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 e Avoid shaking the meter particularly in the measurement mode The accuracy and function of the meter may be adversely affected by the specified limits outside and improper handling A 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 some 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 waveguides inductive ovens Field strength measuring device can underrate pulsed 3 9720 28 09 2012 signals Particularly with radar signals significant measurement errors can arise All field strength measuring devices have a l
5. 0MHz to 1 9GHz eae 2 4dB 1 9GHz to 3 5GHz a me Cape Isotropy deviation Typically 1 0dB f gt 50MHz e Auto power off minutes in an e Overload limit 10 61mW cm2 200V m e Operating temperature range 0 C to 50 C i wesie jade 0 e Operating humidity range 25 to 75 RH i i e Storage temperature range 10 C to 60 C e Storage humidity range 0 to 80 RH e Dimensions 60 x 60 x 237 mm approx e Weight 200gms including battery approx e Accessories Instruction manual x 1 9V battery installed x 1 carrying case x 1 8 9 4 OPERATION 4 ALARM MODE key 4 1 Front panel controls description 1 Press this key to change sensor axis selector All axis gt X axis Y axis Z axis 2 Press and hold this key while turning the meter on to z switch the device to the alarm setting mode Ye O 3 Press this key for 2 seconds to switch the alarm function on or off 5 3 Unit key 1 Press this key to change units selector mV m or V m gt mA m or mA m gt mW m mW m or W m mW cm or mW cm 2 Press this key for 2 seconds to turn the backlight on The backlight turns off automatically in 15 seconds later 3 Press and hold this key and turn on the meter again to 3 disable the backlight auto off function 4 6 key Press this key to turn the meter on or off 7 MEM A key 1 Press this key momentarily to store one data set to 7 memory
6. MECO Certificate of Calibration We hereby certify that this product has been calibrated and found to be in accordance with the applicable SPECIFICATIONS and STANDARDS Accuracies of the standard equipment used in this calibration are traceable to the National Standards MECO METERS PVT LTD Plot No EL 60 MIDC Electronic Zone TTC Industrial Area Mahape Navi Mumbai 400710 INDIA Tel 0091 22 27673311 16 27673300 Board Fax 0091 22 27673310 27673330 E mail sales mecoinst com Web www mecoinst com ImeCto N Petey LL Meter Si a SR NO ELECTROSMOG CHECKED BY METER DATE MODEL 9720 MODEL NO USER MANUAL Contents SAFETY INFORMATION 1 Safety Information cccccceccsescsscesscesssssessesesseseeeeseeeeeen 0 CAUTION 2 INGFOGDUCTION cccccccccceccccececcsccessecesseeesecesecesseevsceeseeesseeeees 0 Before making a measurement check if the low battery 2 1 Fundamentals 2 2 Application 2 3 Features 3 Specifications sisccdescencccnctessacsetexensssenesvexeeenrendesederdenaeexeenees 0 3 1 General Specifications 3 2 Electrical Specifications A DDS Al ONS aires ccercence Sasi decent TA 0 4 1 Front panel control description 4 2 LCD display description 4 3 Use E field sensor 4 4 Explanatory notes 4 5 Setting the meter 4 6 Making measurements 4 7 Manual data memory storeing individual measured values 5 Measurement preparation 5 1 Battery loading 5 2 Battery replacement symbol
7. eld from a distant source 4 6 2 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 4 6 3 Alarm function Use this feature in the Instantaneous Max instantaneous Average or Max average modes When the instantaneous measured value exceeds the limit value a sequence of warning beeps sounded ji 4 7 Manual data memory storing individual measured values The meter includes a non volatile manual data memory function which can store a maximum of 99 measured values 4 7 1 Storing individual measured values ua Value stored indication MI n Q Current memory location Starting with memory to location 01 The current memory location number appears in the lower right small display Once you press the MEM key it will store a displayed value and plus one for the memory location number Each flash of the M symbol display indicates one storage The memory location number shows 99 to indicate the manual datamemory is full then you must clear the entire contents of the manual data memory before you store any new values 4 7 2 Reading individ
8. gnetic field strength uUW m mW m W m W cm and mW cm Power density ppop Measured value displayed as per selected mode and selected units R Manual data memory mode indication H Manual data memory address number 1 99 J L The manual data memory clear mode Stored measured value to memory indication OS 11 ALM Alarm function on off or alarm setting indication 12 A When the alarm function is on the instantaneous measured value exceeds the limit value indication 13 EPP Analog bargraph of each axis X Y or Z measured dynamic range indication for observing trends 4 X X axis measured value displayed 5 Y Y axis measured value displayed 6 Z Z axis measured value displayed 3 Use E field sensor The actual 3 channel sensor is located in the head part of the meter The three voltages generated by the sensor are fed back to the meter In far fields an E field sensor is preferable due to the greater bandwidth The E field sensor for frequencies is from 50MHz to 3 5GHz The meter is a small portable instrument that measures the electric field presented in the atmosphere of the measurement sensor surroundings The measurement of the field is done by moving the aerial Of the sensor in the desired measured environment You obtain a direct wide band measurement of the field that the measurement sensor is subjected to To find the value of the field emitted by a source of interference s
9. imited 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 INTRODUCTION Fundamentals Electromagnetic pollution This Meter used to indicate electromagnetic pollution generated artificially Wherever there is a voltage or a current the 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 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 V m Use the units of electric field strength for measurements in the following situations e In the near field area of the source e Where the nature of the electromagnetic field is unknown 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 The meter uses of magnetic field strength for measure
10. imply point the aerial towards it and get as close as possible the value of the field is inversely proportional to the distance of the sensor emission source The operator must take care not to be between the source of disturbance and the zone to be checked the human body shields electromagnetic fields The E field sensor is isotropic it does not require special handing Its sensitive part measures the field according to 3 axes without the aerial having to be moved in the 3 planes Simply point it at the target to make the measurement 13 4 4 Explanatory notes 4 4 1 Units of measurement The meter measures the electrical component of the field the default units are those of electrical field strength mV m V m The meter converts the measurement values to the other units of measurement i e the corresponding magnetic field strength units A m mA m and power density units uW m mW m W m W cm and mW 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 4 4 2 Result modes 14 The bar graph display always shows each axis X Y or Z the instantaneous measured dynamic range value The digit display shows the instantaneous or result according to one of fou
11. l will disappear from the display 4 5 8 Setting the backlight auto off function off Power off Hoid on viv O ITN i 1 Press key to turn off the meter 2 Press and hold x UNIT key and turn on the meter again to disable the backlight auto off function 4 6 Making measurements Important The following effect will be noted with all field strength meters If move the sensor quickly excessive field strength values will be displayed which do not reflect the actual field conditions This effect is caused by electrostatic charges Recommendation Hold the meter steady during the measurement 20 4 6 1 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 1 Hold the meter at arm s length 2 Make several measurements at various locations around your work place or the interested areas as described above This is particularly important if the field conditions are unknown 3 Pay special attention to measuring the vicinity 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 fi
12. ments only in the far field area of the source 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 milliwatts per square centimeter mW cm The characteristic of electromagnetic fields 2 2 Electromagnetic fields propagate as waves and travel at the speed of light c The wavelength is proportional to the frequency c speed of light f frequency If the distance to the field source is less than three wavelength then we are usually in the near field If the distance is more than three wave length the far field conditions usually hold In the near field the ratio of electric field strength E and magnetic field strength H is not constant so we have to measure each separately In the far field however It is enough to just measure one field quantity then the other could be computed accordingly Application Quite often routine operation 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 are not exposed to dangerous levels of electromagnetic radiation such as High frequency RF electromagnetic wave field strength measurement Mobil phone base station antenna radiatio
13. n power density measurement Wireless communication applications CW TDMA GSM DECT RF power measurement for transmitters Wireless LAN Wi Fl detection installation Spy camera wireless bug finder Cellular Cordless phone radiation safety level Microwave oven leakage detection Personal living environment EMF safety wavelength 2 3 Features The meter is a broadband device for monitoring high frequency radiation in the range from 50MHz to 3 5GHz The non directional electric field and high sensitivity also allow measurements of electric field strength in TEM cells and absorber rooms The unit of measurement and the measurement types have been selected to expressed in units of electrical and magnetic field strength and power density 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 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 50MHz to 3 5GHz Frequency range For isotropic measurements of electromagnetic fields Non directional isotropic measurement with three channel measurement sensor High dynamic range due to three channel digital results proces
14. r modes which can be selected Instantaneous The display shows the last 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 Maximum average MAX AVG The digital display shows the highest average value measured the MAX AVG symbol is displayed Field strength Max Hoid 4 4 3 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 20 to 5 00 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 Frequency dependent sensor calibration factors are provided for this application In many cases the measurement accuracy will be sufficient even if the frequency response of sensor calibration factor is ignored CAL can be set to 1 00 in such cases 15 9720 28 09 2012 E Field typically calibration data Frequency CAL 50MHz 1 45 100MHz 1 75 200MHz 1 78 300MHz 1 80 433MHz 1 84 500Mhz 1 87 600MHz 1 84 7OOMHz 1 89 800MHz 1 78 900MHz 1 84 1GHz 1 75
15. sing Configurable alarm threshold and memory function Easy amp safety to use 9720 28 09 2012 3 SPECIFICATIONS 3 2 Electrical Scecifications 3 1 General Specifications Unless otherwise stated the following specifications e Measurement method Digital triaxial measurement hold under the following conditions e Directional characteristic Isotropic triaxial e The meter is located in the far field of a source the e Measurement range selection One continuous range sensor head is pointed towards the source e Display resolution 0 1mV m 0 1mA m 0 1mW m2 e Ambient temperature 23 C 3 C 0 001m W cm e Relative air humidity 25 to 75 a Frequency range 50MHz to 3 5GHz e Display refresh rate Typically 0 5 seconds i an o Specified measurement range e Display type Liquid crystal LCD 4 digit s Audible siarm Buzzer e CW signal f gt 50MHz 20mV m to 108 0V m 53mA m to 286 4mA m e Units RU wo mA m mA m mW m mW m 2 W m 4mW m2 to 30 93W m2 mW cm mW cm OmW cm to 3 098mW cm Display value Instantaneous measured value e Dynamic range Typically 75dB maximum value or maximum average value b Anomeerien and eee so aed e Alarm function Adjustable threshold with ON OFF e Calibration factor CAL Adjustable s Plequeney een e Manual data memory and read storage 99 data sets e Sensor taking into account the typical CAL Drv b ies 9V NEDA 1604 1604A factor 1 0dB 5
16. ual measured values Reading memory loction Reading mode indicate 22 1 Press READ key the display shows R reading mode 2 Press MEM A and READ key to select the desired memory location 3 Press UNIT key to select the desired reading units 4 Press MODE key to select the desired sensor axis reading 5 Press MAX AVG key to exit 4 7 3 Deleting manual data memory measured values Once the memory is full you can clear the entire contents of the manual data memory 1 Press Q to turn off the meter 2 Press and hold MEM and turn on the meter again the display then shows M U and Q 3 Press READ to select YES to clear memory 4 Press MEM A to clear memory 5 MEASUREMENT PREPARATION 5 1 Battery Loading Remove the battery cover on the back and put a 9V battery inside 5 2 Battery Replacement When the battery voltage drops below the operating voltage the mark appears and flashes If it appears the battery should be replaced with a new one 23 9720 28 09 2012
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