Triple Axis RF/High Frequency Meter HF-B3G User’s Manual HB4HFB3G0000
Table of Contents Axis RF Meter Quick Start Guide .............................................. 1 1 Introduction........................................................................ 2 2 Simple a method of operation ............................................ 2 3 Fundamentals .................................................................... 3 3.1 Electric field strength (E): ........................................... 3 3.2 Magnetic field strength (H): ........................................
15 16 17 18 Safety Information ........................................................... 27 Battery replacement ........................................................ 28 Safety Precaution ............................................................ 28 End of 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 steps: 1. 2. 3. 4. Insert 9V battery. Turn meter on with GREEN button. Press XYX/MEM button until all three (XYZ) letters are displayed on the screen (to the left of the main number.
HF-B3G 1 Introduction 2 Method of Operation 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. 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). 2 Computed power density (mW/m ). Computed 2 power density (μW/cm ).
HF-B3G 3 Fundamentals Electromagnetic pollution: This meter is used to indicate electromagnetic pollution generated artificially. Wherever there is a voltage or a current, 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 afftect us even if our bodies cannot detect them. 3.
HF-B3G 3.3 Power density (S): Power per unit area normal (perpendicular) to the direction of propagation, usually expressed in units of Watts per square meter (W/m2) or, for convenience, units such as mill Watts per square centimeter (mW/cm2). 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.
HF-B3G 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.
HF-B3G 5 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 antenna and high sensitivity also allow measurements of electric field strength in TEM cells and absorber rooms. The auto-ranging units of measurement and the measurement types have been selected to expressed in units of electrical and magnetic field strength and power density.
HF-B3G 6 Identifying Parts 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. RF three-Axle Sensor. Liquid-crystal LCD. MAX / AVG / R Button. Record / Time / L Button. Power Button. UNIT / ENTER switch Button. Hold / ALARM on/off / Up Button. Backlight/Set XYZ / MEM / Down Button. Tripod mounting screw. Battery cover .
HF-B3G 7 LCD description 1. Primary Display 2. Hold symbol 3. Analogue bar graph 4. MAX symbol 5. AVG symbol 6. Low battery symbol 7. x1x10x100 unit 8. X.Y.Z unit 9. ALARM unit 10. mV/m,V/m (E) 11. µA/m mA /m unit (H) 2 12. µW/m, µW/cm unit 13. E symbol 14. Auto power off symbol 15. Time unit (month:day) (hour: minute) (second) 16. MEM reading symbol 17. SET symbol 18. REC symbol 19. CAL symbol 20. Secondary Display 21. BUZZER symbol 22.
HF-B3G 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, 0.1µA/m, 0.001µW/m2, 0.001µW/cm2 Setting time : typically 1.5s (0 to 90% measurement value.) Sample rate : 3 times per second. Audible alarm: Buzzer.
HF-B3G 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(L) X60(W) X195(H) mm. Weight (including battery) : Approx. 200g. Accessories : User’s manual, 9V battery, Carrying case.
HF-B3G Specified measurement range: CW signal (f >50MHz) : 38mV/m to 20.00 V/m, 53.0uA/m to 53.74mA/m , 0.1uW/m2 to1.089W/m², 0.001uW/cm2~108.9uW/cm2 Dynamic range : Typically 75dB. Absolute error at 1V/m and 2.45GHz : ±1.0 dB. Frequency response : Sensor taking into account the typical CAL factor : ±2.4dB (50 MHz to 1.9 GHz). ±1.0 dB (1.9 GHz to 3.5GHz). Isotropy deviation : Typically ±1.0 dB (f 2.45GHz). Overload limit : 0.042 mW/cm2 (11 V/m) per axis.
HF-B3G field strength units (µA/m or mA/m) and power density units (µW/m2 , mW/m2 or µW/cm2 ) using the standard far-field formulae for electromagnetic radiation. 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 by the sensor, no symbol is displayed.
HF-B3G 9 Measurement Procedures and Preparation Battery loading : Remove the battery cover on the back and put a 9V battery inside. Battery replacement: When the low battery symbol of ” ” appears on the LCD display, the battery should be replaced with a new one. 9.1 POWER button： Press” ”button to power on. 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.
HF-B3G Press the “ ” button once again to deactivate it. 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/m2). Computed power density (μW/cm2). Press “ ” button to change the unit. Possible units : mV/m, V/m, µA/m , mA/m, µW/m2, mW/m2, µW/cm2 9.4 MAX / AVG Record: Press “ ” key to switch to the next display.
HF-B3G and back to MAX. Press and hold “ ”key for 3 seconds to disable this function. The maximum averaging storage is up to 99 minutes and 99 seconds. After this period of time, updating will stop automatically and the LCD . displays 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”.
HF-B3G 9.6 Backlight Display and Reading in The Dark. Press “ ” key backlight light on. Again Press ” button to power off. “ Backlight light turns off automatically after 30 seconds. 9.7 XYZ: Press ” ” this key to change sensor axis selector : ”All axis” → “X axis “→ “Y axis” → “Z axis”. 9.8 Alarm ON/OFF Setup Press and hold ” ” then press ” ” key to switch the alarm function on. The “ALARM” symbols in the display indicates that the alarm function is on.
HF-B3G . sounds, the display shows 9.9 Viewing Data Records Press hold “ ” button and press “ to view the saved data records ” button ” or “ ” button to see the next or Use “ previous records ” key to close the setup, exit the mode. Press “ 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”.
HF-B3G 10 Setup Mode While the meter is on, press hold “ and “ Press “ ” button ” button to enter the setup mode. ” button to scroll through the setup function. Push “ ” button to save setup data. Note 1 : you can set up 6 different functions in setup mode Default Clock Setup setup 1 : Setting the alarm limit value (ALARM). setup 2 : Clear data logger memory. setup 3 : Analogue bar graph x1 x10 x100. setup 4 : Auto Power Off Time. setup 5 : Setting the calibration factor (CAL). 10.
HF-B3G Use “ ” or “ ” to change digit(Hour→day→ Month→year→Minute). Use “ ” or “ ” 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. 10.2 Setting the alarm limit value (ALARM)-2 The alarm limit value determines the level at which the alarm wil sound. The alarm limit value can be edited only in the V/m unit. The ALARM setting range is from 0.001 to 999.9 V/m.
HF-B3G While the meter in ON, press and hold “ button and press “ ” ” button to enter Setup Mode. Press “ ” button 1 more time to enter the alarm setting mode, the readout value is flashing and ”V/m” unit is displayed. Press “ ” key to move decimal. Press “ ” key to select the desired digit. Press “ ” and “ Press “ ” key to store the new setting value ” button to change digit. and exit. 10.
HF-B3G Press “ ” button 2 more times to enter clear data logger memory mode (3.SET). will show on the display. To exit without clearing memory, press “ To clear the memory, press “ ” key ” then press “ 10.4 Analog bar graph setup-4 While the meter in ON, press hold “ and press “ Press “ ” button ”，button to enter Setup Mode. ” button 3 more times to : enter analogue bar graph setting mode. The ”graph” unit is flashing. Current setting of x1, x10, or x100 is displayed at bottom of graph.
HF-B3G Press “ and exit. ” key to store the new setting value 10.5 Auto Power Off Time function setup-5 While the meter is on, press and hold “ button and press “ ” ”，button to enter the auto power off Setup Mode. Press “ ” button 4 more times. Press “ “ and “ ” button to change the value. Auto power off time default setting is 15 minutes. Maximum auto power off time : 99 minutes. Set value to 00 to disable auto power off. Press “ ” key to store the new setting value and exit.
HF-B3G Press “ ” button 5 more times to enter the calibration factor setup mode, The CAL setting range is from 0.10 to 9.99. Default is 1.00 which is appropriate for most situations. Use “ Press “ ” or “ ” to select the desired digit. “ and “ ” button to change the digit Press “ ” key to store the new setting value and exit. Calibration factor (CAL) The calibration factor CAL serves to calibrate the display for a specific frequency when the frequency of a single signal is known.
HF-B3G 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.
HF-B3G 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. 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.
HF-B3G 14 Safety Information CAUTION Before making a measurement, check if the ” is shown on the low battery symbol” 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 atmospheric condition outside specified limits and improper handling may adversely affect the accuracy and function of the meter.
HF-B3G 15 Safety Information DANGER In some cases, work in the vicinity of powerful radiation sources can be a risk to 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 consume electromagnetic energy. Be aware that secondary radiators (e.g.
HF-B3G 16 Battery replacement 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. Be sure to turn unit off after use to conserve battery life. 17 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.
EMR Shielding Solutions Inc. 399 Four Valley Drive, Unit 13, Concord, Ontario, L4K 5Y7, Canada E-mail: info@emrshieldingsolutions.com www.emrshieldingsolutions.
