Tenmars TM-196 User manual

TeNMARS
RF three-Axis
Field Strength Meter
TM-196
User's
Manual
CE
HB2TM1960001
TENMARS EL ECT RO NICS co., LTD

Table of Contents
Axis RF Meter Quick Start Guide ....... .. . .. ........ 1
1 In
troduction ................ .. . .. ............... .. ....... .. 2
2
Simple a method of operation .................. 2
3 Fundamentals............................................ 3
4 Elec
tric field strength (E) .. ......... .. .... .. ....... 3
4.1Magnetic field st re ngth (H).. .. .. ...... ....... .. .. .. 3
4.2Pow
er density (S) .......... ... .... .. ...... ... .. . .. ..... 4
4.3The characteristic
of electromagnetic fields
.. .. .. ... .............. .. .. ... .. .. . ... .... .. .. ........ ... .. . ....... ... .4
5 Ap plicatio n......................................... ...... .. 5
6 Features ....
.. .................................. .... ......... 6
7
Identify ing Parts .............................. .. .. .. .... 8
8 LCO Oesc
ription ............. .. ......................... 9
9
Specifications .. ........................................ 10
9.1 General specifications .. . .. ... ... .. ..... .. . ... .. . .. 10
9.2 Electrical specifications.
.. ........ .. .. ... .. ....... 12
9.3 Units
of measurement.... .. ................ .. ... .. 13
9.4 Result modes
.. .. ..... .. ... .. ..... ... .... .. .. . .. ....... 13
Measurement Procedures and Preparation . 14
9.5 POWER key .. ... .. . .. ... .. ................... ... .. ... .. 15
9.6 Data hold key.............
.. . .. ..... .... ..... .. ........ 15
9. 7 Units key: ... ................ .. ..... .. ...... .. ..... .. .. .. . 16
9.8 MAX / AVG Record .................... .. . .. ........ 16
9.9 Manual data memory storing ..... .. .. .. .... ... 17
9. 10 XYZ/CALL....... ... .. .. .... .. . .. ...... .. ......... .... . 17
9.1 1 Al arm ON/OFF Setup .. ... ........... .. .. .. ... . .. 17
TE N MARS
TM-196
9. 11 .1 Viewing Data Records....... .. ... ... ......... 18
9.12 Cancel the automatie power off/on........ 18
9.13 Clock LCD Display
.. .. .. . ... ........... ... ...... .. 19
10 Setup Mode.................... .. ........ .. ........ .. .... 19
10.1 Clock Setup-1 ... .. ... ....... .. ... .. ...... ...... ... .. 20
10 .2 Setting the alarm limit value (ALARM)-2
........ ..... .. ............... .. .............. ... ...21_
10.3 DEL data logger memory setup-3 ..
...... . 22
10.4 Analogue bar graphsetup-4.................
.. 23
10.5 Auto Power OffTime function setup-5... 23
10.6 Setting the calibration factor (CAL)-6.... 24
11 Calibration factor is important for the
measurements ................... .. .............. .. .... 25
11.1 Short-term measurements.. .. ..... .. .. .. .. . ... 26
11.2 Short-term measurements.....
.. ......... .. ...26
11.3 Long-term exposure measurements....
.. 27
12 Battery replacement................................ 27
13 External
OC Power ....... .. ...... .. ................. 28
14 Safety
Precaution .................................... 29
15 SAFETY INFORMATION
.. . .. ...... .... ........... 30
16 SAFETY INFORMATION .......................... 31
17 End of life .......•. ;~ .. ...::............................... 32

TeNMARS
TM-196
Axis RF Meter Quick Start Guide
This meter has many capabilities,
includi
ng memo ry, 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. Tu rn meter on with GREEN button.
3. P re ss XYXlMEM button until a ll three
(XYZ) letters are displayed on the
screen (to the left
of the ma in number.
4. Press UNIT/ EN TER 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 ma
ke your first
measurements!
EN-1
TeNMARS
TM-196
1 Introduction
Th is meter is designed for measuri ng and
monitoring Radio-Frequency
electromagnetic field strength.The meter
is calibrated prec is ely over the frequency
range
of 10Mz-8GHZ.
2 Simple a method of operation
Press "power" bu tton on.To change
measuring unit (mV/m), push
UN IT"button to
c
ha nge the u ni t.Electric field strength
(V/m).Computed magnetic field strength
(mA/m).Computed power density
(m w/m
2}COmputed power density
(l.J W/ cm ).
Press "xy z" this key to change sensor axis
selector
"A
ll axis " -- "X axis" -- "Y axis" -- "Z
axis".
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TM-196
3 Fundamentals
El ec tromag net ic p ollut i on
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 horne, where they
affect us even
if our sense organs perceive
nothing.
4 Electric fie ld strength (E)
A field vector quan ti ty that represents the
force (F) on an in fi nites im al unit positive
test charge (q) at a point divided by that
ch arge. Electric field strength is expressed
in units of volts per meter (mV/m). This
meter measures electric field strength
directly.
4.1 Magnetic field strength (H)
A field vector that is equal to the magne ti c
flux density divided by the permeability of
the medium Magnetic field strength is
express
ed in units of amperes per meter
EN-3
TeNMARS
TM-196
calculate the magnetic field for the electric
field value. This meter can display the
calculated magnetic field strength.
4.2 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)
4.3 The characteristic of electromagne t ic
fiel ds
Electromagnetic fields propagate as
waves and travel at the speed of light (C).
The wavelength is proportional to the
fr
eq uency.
" (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. Ifthe distance is
more than three wavelengths, the far-field
conditions usually hold.
In near field conditions, the magnetic fie ld
value cannot be calculated from the
electric field value. This meter is designed
for reliable far field measurements only.
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5
TENMARS
TM-196
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,
et
c. Additionally, other employees may
b
eexposed to electromagnetic radia ti on .
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
rad
ia ti on power density measurement.
• Wire
le ss 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
leve
l.
• Microwave oven leakage detection.
• Personalliving environment EMF safety.
EN-5
TENMARS
TM-196
6 Features
• The meter is a broadband device for
monitoring high- frequency radiation
in
the range from1 OMHz to 8GHz
• The non-directional electric
fi e ld
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 absorb ed by a
person exposed to the fiel
d. 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 orientatio
n,
e.g. when first entering an exposed
area.
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TM-196
• For isotropie measurements of
eleetromagnetie fjelds.
• Non-direetional (isotropie) measurement
with three-ehannel measurement
sensor.
• High dynamie range due
to three-
ehannel digital results proeessing.
• Configurable alarm threshold and
memory funetion.
• Easy & safe
to use
•
low battery deteetor "I: .. I".
• Manual data memory storing: 200 data
sets.
• Memory Over load indieation
"Ol".
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TeNMARS
TM-196
7 Identifying Parts
1. RF three-Axis Sensor.
2. Liquid-erystal lCD.
3. Hold IAlARM I Up Button.
4. MAX I AVGI Right Button.
5. UNIT I ENTER Button.
6. XYZ I MEM I Down Button.
7. Power Button.
8. RECI time;
I leftward Button.
9. SE T Button.
10. Tripod mounting serew.
11. Battery Cover.
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8
TeNMARS
TM-196
LCD Description
1. Primary Display
2. Ho ld 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 sound
10. mV/m, V/m (E)
11 . ~Al m ,Alm unit (H)
12. ~W/m2/ ~W/cm2unit
13. ESymbol
14 . Auto power off symbol
EN -9
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. Decimal point
TeNMARS TM-196
9 Specifications
9.1 General specifications
• Display type: Liquid-erystal (LCD), 4-1/2
digits maximum reading 19999.
• Measurement method : Digital, Tri axis
measurement.
• Direetional eharaeterist
ie : Isotropie, Tri
axis.
• Measurement range seleetion: one
eontinuous range.
• Display resolution: Display
resolution:0.1 mV/m, 0.01 V/m, 0.1IJAlm,
0.1 mAlm,0.001 IJW/ m2, 0.01mW/ m2,
0.001IJW/
em 2
• Setting time: typieally 1.5s (0 to 90%
measurement value.)
• Sampie rate: 1.5 times per seeond.
• Sampie rate: 3 times per seeond.
• Audible alarm: Buzzer.
• Units: mV/m, V/m, IJAlm, mAlm,
IJW/ m2,
mW/m2, IJW/em2
• Display value: lns tClntaneous measu re d
value, maximumvaiUe, average value,
or maximum average value.
• Alarm fu
ne tion : adjustable threshold
with ON / OFF
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TeNMARS
TM-196
• 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:
O°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.
• D im ensions: 370 (L)x80(W)x80(H) mm.
• Weight (including battery): Approx.400g.
• 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-11
TeNMARS
TM-1 96
9. 2 Ele ct rical spec i fications
• Unless otherwise stated, the following
specifications hold under the following
conditions:
• The meter is located in the far fie ld of a
source; the sensor head is pointed
towards the source.
• Amb
ie nt temperature: +23 °c ±3°C.
• Relative air humidity 25% -75%
• Sensor type: electrical fie ld (E).
• Frequency range: 1 OMHz - 8 GHz.
• Specified measurement range:
CW signal (f >50MHz): 38mV/m to
11 00 V/m, 53. 0uNm to 28. 64mNm
0.1 ' uNm
2 to 309.3mW/m2,OuW/cm2 to
30.93mW/cm2
• Dynamic rang e: 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 Mf-1z to 1.9 GHz , 3.5
GHz to 8GHz )": . ~
±1 .0dB(1.9 GHz to 3.5GHz).
• Isotropy deviation: Typically ± 1. 0 dB
(2.45GHz).
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TeNMARS TM-196
• Overload limit: 0.083 mW/cm2,(17.7
V/m) per axis.
• Overload limit: (0 t050°C): ± 0.2dB.
9.3 Units of measurement
The meter measures the electrical
component
of the field; the default units
are those
of electrical field strength (mV/m )
or V/m). The meter converts the
measurement values to the other units
of
measu re ment, i.e. the corresponding
magne
ti c field strength units (j..lAlm or
mAlm) and power density units
(j..lW/m
2 ,
mW/m2 or j..lW/cm
2) using the standard
far-fie
ld 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 measuremen
ts.
9.4 Result modes
The bar graph display always shows the
instantaneous measured dynamic range
value. The digital display shows the result
EN-13
TeNMARS
TM-196
according to one of three modes, which
can be selected.
Instantaneou
s: 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
in stantaneous value measured, the "MAX
"symbol is displayed.
Average (AVG):The digital display shows
the average value measured, the "AVG"
symbol is displayed.
In stantaneous mode is the default setting
when the meter is turned on. The following
graph shows
of Instantaneous (actual),
MAX (hold),AVG and
• MAXIAVG:
"" ........
Measurement Procedures and
Preparation
Battery loading: Remove the battery cover
EN-14

TeNMARS
TM-196
on the back and put a 9V battery inside.
Battery replacement: When the symbol of
"r;:±J" 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.
9.5 POWER key :
Press key turn ON the meter.
Press key again to turn power
OFF.
9.6 Data hold key:
Press the " , key to go into hold mode,
and "HOLD" appears on the screen to
allow you to read t he data.
Press"
HO ' this key once again to
deactivate
it.
EN-15
TeNMARS TM-196
9.7 Units key:
Change units with the "UNITS" keyas
follows Electric field strength (V/m)
Computed magnetic field strength (mAlm).
Computed power density (mW/m2
).
Computed ower density (~W/cm2).
Press" , key to change the units:
mV/m, V/m,
~Alm, mAlm, ~W/m2, mW/m2,
~W/cm2.
I .nnnn .nnnn l .nnnn i .nnnn
IIUUu.u UUUUiJUU.UUDUU.UU
XYI ..,.XYZ .. _ XVI .. wr... XVI.. __
.cass .Oa.aS .Ot1:8S .cass
9.8 MAX I AVG Record:
Press" --, key to switch to the next
d is pl ay. The display switches from MAX to
AVG to MAX/AVG and back to MAX.
1: 9-9 9.81:9 9 9B 1:9g9B 1 "33.D
xv z _XVZ _ XYZ ... XVI
)
JJBlIB J1Bl1B JJ8lIB 119~9
Press and hold" 'key for 3 seconds to
disable this functio
,n. "
The maximum storage
is up to 99 minutes
and
99 seconds
After this period oftime, updating will be
completed automatically and then the LCD
EN-16

TeNMARS
TM-196
d i s plays~.
9.9 M an ual data memory storing
Press" , key, the meter will save the
eurrent measur
ed result, and REC with a
n
um ber 001 -200 will appear.
M
an ual data memory Storing: 200 da ta
sets.Over load In dieation: "OL".
nn:J
nt
o 0 ... uuc 0
- aa,
-UL.
9. 10 XYZlCALL:
Pre ss" , this key to change sensor
axis seleeto
r:" All axis "~" X axis " ~ " Y
ax i s " ~ "Z axis ".
nnnn l ,nnnn l ,nnnn l ,nnnn
U
UUUU U Uuu,u u uuu,uuUuu,u
MY. _x _,. _ r. _
.lJ ftl8 Jl ftl8 Jl mB Jl WB
9.11 Alarm ON/OFF Setu
P re ss hold and " MOl. 'key to
switeh the alarm funetion
on The "ALA RM "
symbols
in the display indieates th.at the
alarm funetion
is on. Press ho ld"
and" , key to turn off the alarm
EN -17
TeNMARS
TM-196
f un etio n. When the Alarm is ON, the
d
is play shows .,)).
~
8BB 1 888 1 888
vz ~ KY.l ....... x. ... z-tt .........
888 . . .8888 . 88:88
9. 1 1. 1 Data Re cords
Press ho ld key and press"
key to v ie w the saved data reeords Use
, or " , key to see the next or
pre
vi ous reeords Press key to
elo se the setup, exit the mode.
1 BaD l BBB I B8B
Jnnc- aäi oDBO C" aä2J18:tlfr 001
9.12 Caneel the automatie power off/on:
The default setting is auto power-off, the
time
is set for 15 minutes.
Press hold' , key and press"
key to disable the.
?utQ.matie power-off, the
symbol
of 0 wi ll be disappeared on the
LCD displ
ay.
P re ss h ol d " , key and " ,key
ag
ai n to enable the automatie power-on,
EN -18

TeNMARS TM-196
the symbol of 0 will be appeared on the
LCD display.
9.13 Clock LCD Display
Press
hold" 'key and press'
key for more than seconds to select the
display method ofthe Year, Month, Date,
hour and Second.
This meter's
dock uses 24 hour time
setting.
Default time mode setting is "2010/01/07
0
0: 02" ":00".
aa:2:J '2'3 '211U9: :5
10 Setup Mode
Press hold ' , key first and" !MIT '
button to enter t he Setup Mode.
Press key to change setup
function. Setup function see Note1)
Push " , key 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
EN-19
TeNMARS
TM-196
• setup 3 : Analogue bar graph
X1.X1 0.x100
• setup 4 : Auto Power Off Time
• setup 5 : Setting the calibration factor
(CAL)
10.1 Clock Setup-1
Press
hold" , key first and
key
to enter the Setup Mode.
Press" ,key to select option
adjust.
Press"
'or" MA", key to change the
date and time
(hour--day--month--year
--minute).
Press"
UNtT , ke y to save and exi t.
This meter dock is 24 hour time setting.
Date/Time default Format: 2009/12/21
12:12.
Year Format: 2000-2099 di
splayas 00 -
99.
EN-20

TeNMARS
TM-196
'22: '22:
'22 :
10.2 Setting the alarm limit value
(ALARM)-2
The alarm limit value is used to monitor
the display value automatically. It controls
t
he 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
hold" " key first and "
key to enter the Setup Mode.
Press again to enter the alarm
setting mode.
Press" , key
to move decimal.
Press" , key to select the desired
setting value.
Press" 'key and " , key to
change digit.
TeNMARS TM-196
9.999 99.99 g91g
XYZ _ XYZ -XYZ -
Press " , key to select the value.
ggfg ggfg ggfg gggg
x'tZ .. X't'Z .. XY% .. XYZ ...
Press" - ,key to store the new setting
va lue and exit.
10.3 DEL data logger memory ;:OOC:I . U""-~
Press hold " ,key first and
key to enter t
he Setup Mode.
Press" 'key twice to enter the default
display
'I!T DSS", Press"
""
~ES
to select • 1lBB.
Press" , key .10 d~lete the memory
and exit.
EN - 21 EN-22

TeNMARS
TM-196
no
select 'lif DBB" and then press to
keep the memory and exit.
10.4 Analogue bar graphsetup-4
Press hold" , key first and
key to enter the Setup Mode.
Press key for three times to enter
t
he analogue bar graph setting mode.
The "graph" unit is flashing displayed
X1 '
X10 ' X100.
Press" 'or " ,key to select the
value
X1 ,X10 ,X100 0
Press"
, key to save and exit.
10.5 Auto Power Off Time function
setup-5
Press hold" , key first and
key to enter the Setup Mode.
EN-23
Te N MARS TM-196
Press" , key for four times, the
symbol 0 is displayed.
The auto power offtime default setting is
15 minutes.
Press" , and " , key to change
the:
00-:99 minutes.
Press key to save and exit.
:00 -? Auto power offdisable.
:99
-? Maximum auto power off time
• 'SSET
• • ß
10.6 Setting the calibration factor
(CAL)-6
Press hold" , key first and "
key to enter the Setup Mode.
Press" , key for five times to display
WU
'""
the" CAL SET" the default factor ~
-; "
The CAL setting range is from 0.10 to
9.99.
rt 10 - ~gg
EN-24

TeNMARS TM-196
Press" " 'or" key to select the
value.
Press"
'or" IIAJC 'key to select the
digits.
Press" , key to save and exit.
11 Calibration factor is important for
the measurements:
T he calibration factor CAL serves to
calibrate the result display. The field
strength value measured internally
is
multipli ed 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.
The following effect will be noted with all
fj eld strength meters:
• If the sensor
is moved quickly,
excessive field strength values could
be
displayed. This effect is caused by
EN-25
TeNMARS TM-196
electrostatic charges.
• Recommendation: hold the meter
steady during the measurement.
11.1 Short-term measurements:
Application : Use either the "instantaneous"
or the "Max .instantaneous" mode, ifthe
characteristics and orientation
of the field are
unknown when entering an area exposed to
electromagnetic radiation.
11.2 Short-term measurements
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 fjeld
conditions are unknown.
Pay special attention to measuring the
vicinity of possible radiation sources.
Apart from active squrees, 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
EN-26

TeNMARS
TM-196
that metallic objects within the field may
locally concentrate or amplify the field
from a distant source.
11.3 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.
Ifthe symbol " " appears on
the LCD, please replace the battery
• Turn off the instrument.
• Remove the battery cover
• Replace the battery.
• Install the battery cover.
EN-27
TeNMARS TM-196
I
13 ExternalOe Power
• External AC to DC adapter: Voltage
9VDC(8-14VDCMax)
• Supply
current: >300mADC
•
Socket: pin Positive, Ground Casing
External
• Di ameter 6.3mm; internal Diameter 2.0
mm
0----...
o
-J
EN-28

TeNMARS
TM-196
14 Safety Precaution
• For cl eaning the instrument use a soft
dry cloth. Never use a wet cloth,
solvents or water,
ete.
• Operation Altitude : Up to 2000M.
• Operating Environment: Indoors use.
This instrument has been designed for
being used
in an environment of
pollution degree 2.
TeNMARS TM-196
15 SAFETY INFORMATION
~
I CAUTION
Before making a measurement,
check if the low battery symbol"
~ " is shown on the displayas
soon as the meter is sw itched on.
Change the battery ifthe 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 mete r.
EN -29
EN -30

n some cases, 1
TeNMARS
TM-196
powerful radiation sources can be a
risk of your life.
Be aware that persons with
electronic implants (e.g. cardiac
pacemakers) are subject to
J:)articular 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
melallic fence) can cause a local
amplification
of the field.
Be aware that the field strength
in
the near vicinity of ra di ators
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
anse.
All field strength measuring devices
have a limited specified frequency
range. Fields with spectral
com outside
of this
are
EN-31
TeNMARS
TM -1 96
incorrectly evaluated and tend to be
underrated. Before using field
strength measuring devlces, you
sho
ulO thus be certain that all field
components to be measured lie
in
the specified frequency range of the
measuring de
vi ce.
17 End of life
-Cauti
on : this symbol indicates that
equipment and its accessories shall
be subject to
asepar ate collection
and correct disposal
EN-32

TeNMARS ~
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Environment Test & Measu re ment
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er, Radiation met er,
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6F, 586, RUI GUANG ROA D, NEIHU,
TAIPEI
114 , TAIWAN.
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