Tenmars TM-195 User Manual
User’s Manual
TM-195
RF three-Axle Field Strength Meter
HB2TM1950000
Table of Contents
1 Introduction ............................................................................... 1
2 Simple a method of operation .................................................. 1
3 Fundamentals ........................................................................... 1
3.1 Electric field strength (E): ................................................... 2
3.2 Magnetic field strength (H): ................................................ 2
3.3 Power density (S): .............................................................. 3
3.4 The characteristic of electromagnetic fields: ..................... 3
4 Application ................................................................................. 5
5 Features .................................................................................... 7
6 Identifying Parts ........................................................................ 9
7 LCD description ....................................................................... 11
8 Specifications .......................................................................... 12
8.1 General specifications ..................................................... 12
8.2 Electrical specifications .................................................... 15
8.3 Units of measurement ...................................................... 18
8.4 Result modes ................................................................... 18
9 Measurement Procedures and Preparation ........................... 20
9.1 POWER button ............................................................... 20
9.2 Data hold button: .............................................................. 20
9.3 Units button: .................................................................... 21
9.4 MAX / AVG Record: ......................................................... 22
9.5 Manual data memory storing .......................................... 22
9.6 Backlight Display and Reading in The Dark. ................... 23
9.7 XYZ/CALL: ....................................................................... 23
9.8 Alarm ON/OFF Setup ....................................................... 23
9.9 Viewing Data Records ..................................................... 24
9.10 Clock LCD Display ......................................................... 25
10 Setup Mode ........................................................................... 27
10.1 Clock Setup-1 ................................................................. 27
10.2 Setting the alarm limit value (ALARM)-2 ....................... 28
10.3 DEL data logger memorysetup-3 ................................... 30
10.4 Analogue bar graphsetup-4 ........................................... 30
10.5 Auto Power Off Time function setup-5 ........................... 31
10.6 Setting the calibration factor (CAL)-6 ............................ 32
11 Making measurements ........................................................ 34
12 Short-term measurements ................................................... 34
13 Long-term exposure measurements ................................... 36
14 SAFETY INFORMATION ...................................................... 36
15 SAFETY INFORMATION ...................................................... 38
16 Battery replacement .............................................................. 40
17 Safety Precaution ................................................................. 40
18 End of life .............................................................................. 41
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”.
3 Fundamentals
Electromagnetic pollution:
EN-1
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
EN-2
expressed in units of amperes per meter (A/m). In far field
situations, one can calculate the magnetic field for the electric
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/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.
EN-3
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.
EN-4
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.
EN-5
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-6
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 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
EN-7
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.
For isotropic measurements of electromagnetic fields.
Non-directional (isotropic) measurement with three-channel
measurement sensor.
High dynamic range due to three- channel digital results
processing.
Configurable alarm threshold and memory function.
Easy & safe to use
Low battery detector “ ”.
Over load indication “OL”.
EN-8
6 Identifying Parts
EN-9
1. RF three-Axle Sensor.
2. Liquid-crystal LCD
3. MAX / AVG Button.
4. Record / Time Button.
5. Power Button.
6. UNIT / ENTER switch Button.
7. Hold / Up Button.
EN-10
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