HTC EMF-523 Manuale utente
EMF-523
RF three-Axis Field
Strength Meter
User’s
Manual
Table of Contents
Axis RF Meter Quick Start Guide ..............................................1
1Introduction........................................................................2
2Simple a method of operation............................................2
3Fundamentals....................................................................3
3.1 Electric field strength (E): ...........................................3
3.2 Magnetic field strength (H): ........................................3
3.3 Power density (S): ......................................................4
3.4 The characteristic of electromagnetic fields:...............4
4Application......................................................................... 5
5Features ............................................................................6
6Identifying Parts................................................................. 7
7LCD description.................................................................8
8Specifications ....................................................................9
8.1 General specifications ................................................9
8.2 Electrical specifications ............................................10
8.3 Units of measurement .............................................. 11
8.4 Result modes ...........................................................12
9Measurement Procedures and Preparation .....................13
9.1 POWER button：.....................................................13
9.2 Data hold button: ......................................................14
9.3 Units button : ............................................................ 14
9.4 MAX / AVG Record:.................................................. 15
9.5 Manual data memory storing ....................................16
9.6 Backlight Display and Reading in The Dark..............16
9.7 XYZ: .........................................................................16
9.8 Alarm ON/OFF Setup ...............................................17
9.9 Viewing Data Records .............................................. 17
9.10 Clock LCD Display ...................................................18
10 Setup Mode.....................................................................18
10.1 Clock Setup-1...........................................................19
10.2 Setting the alarm limit value (ALARM)-2................... 20
10.3 DEL data logger memorysetup-3..............................21
10.4 Analog bar graph setup-4.........................................21
10.5 Auto Power Off Time function setup-5 ......................22
10.6 Setting the calibration factor (CAL)-6........................23
11 Making measurements ....................................................24
12 Short-term measurements ...............................................24
13 Long-term exposure measurements ................................25
14 SAFETY INFORMATION.................................................26
15 SAFETY INFORMATION.................................................27
16 Battery replacement ........................................................28
17 Safety Precaution ............................................................28
18 End of life ........................................................................28
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. 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!
EMF-523
2
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/m2). Computed
power density (μW/cm2).
Press “ ”this key to change sensor axis
selector :”All axis” →“X axis “→“Y axis” →“Z
axis”.
EMF-523
3
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 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 field from the
electric field value. This meter can display the
calculated magnetic field strength.
EMF-523
4
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.
λ(wavelength) = C (speed of light) / f (frequency)
If the distance to the field source is less than three
wavelengths, then 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.
EMF-523
5
4 Application
zQuite 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:
zHigh frequency (RF) electromagnetic wave
field strength measurement.
zMobile phone base station antenna radiation
power density measurement.
zWireless communication applications (CW,
TDMA, GSM, DECT).
zRF power measurement for transmitters.
zWireless LAN (Wi-Fi) detection, installation.
zSpy camera, wireless bug finder.
zCellular /Cordless phone radiation safety level.
Microwave oven leakage detection.
zPersonal living environment EMF safety.
EMF-523
6
5 Features
zThe meter is a broadband device for
monitoring high- frequency radiation in the
range from 50MHz to 3.5GHz.
zThe non-directional electric field antenna and
high sensitivity also allow measurements of
electric field strength in TEM cells and
absorber rooms.
zThe 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.
zAt 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.
zThe meter can be set to display the
instantaneous value, the maximum value
measured or the average value.
zNon-directional (isotropic) measurement with
three-axis measurement sensor.
zHigh dynamic range due to three- channel
digital results processing.
zConfigurable alarm threshold and memory
function.
zEasy & safe to use.
zLow battery detector “ ”.
zOver load indication “OL”.
EMF-523
7
6 Identifying Parts
1. RF three-Axle Sensor.
2. Liquid-crystal LCD.
3. MAX / AVG / R Button.
4. Record / Time / L Button.
5. Power Button.
6. UNIT / ENTER switch Button.
7. Hold / Up Button.
8. Backlight/Set.
9. XYZ / MEM / Down Button.
10. Tripod mounting screw.
11. Battery cover.
Indice
Altri manuali HTC Strumento di misura
