Lutron Electronics EMF-819 Manuale di installazione
50 MHz to 3 GHz Radio Frequency Radiation Meters
Electromagnetic Field strength measurement
3 AXIS RF ELECTROMAGNETIC
FIELD METE
R
Model : EMF-819
Your purchase of this RF
EMF METER marks a
step forward for you
into the field of
precision measurement.
Althou
g
h this METER is
a complex and delicate
instrument, its durable
structure will allow
many years of use if
proper operatin
g
techniques are
developed. Please read
the followin
g
instructions carefully
and always keep this
manual within easy
reach.
OPERATION MANUAL
TABLE OF CONTENTS
1. FEATURES...................................................................1
2. APPLICATIONS............................................................2
3. SAFETY INSTRUCTIONS...............................................2
4. SPECIFICATIONS.........................................................4
5. FRONT PANEL DESCRIPTION.......................................
.
6
6. MEASUREMENT CONSIDERATION................................
.
7
7. MEASURING PROCEDURE............................................
.
8
7-1 Buttons instructions..............................................
.
8
7-2 Symbols & units of display.....................................9
7-3 Unit Selection...................................................... 10
7-4 Frequency Team Selection.....................................10
7-5 Alarm Limit Settin
g
and Alarm start........................10
7-6 Data Hold.............................................................11
7-7 Data Record (Max., Min. readin
g
)...........................11
7-8 Peak Hold.............................................................12
8. AUTO POWER DISABLE.................................................12
9. RS232 PC SERIAL INTERFACE.......................................
.
12
10. BATTERY REPLACEMENT.............................................14
11. SYSTEM RESET......................................................... 14
12. OPTIONAL ACCESSORIES............................................15
1. FEATURES
*3Axisprobe.
* Radio frequency electromagnetic field tester.
* Wide measuring frequency ranges, 50 MHz to 3 GHz.
* EMF-819 is used for broadband devices of monitoring
the wide range radio frequency electromagnetic field
value.
* For precision measurement consideration, the meter
is included one probe :
EP-05H ( Frequency range : 50 MHz to 3 GHz )
* Unit : V/m, W/m^2, mW/cm^2.
* Frequency Selection, two points : Normal, 2.45 GHz.
* Alarm setting function can warn the user if the
measuring antenna is too near the strong radiation
sources, the buzzer will sound to remind the user.
* Peak hold function to latch peak value.
*Data hold function to lock the current reading.
* RS232 computer interface.
* Hard carrying case is included..
* Large size LCD with contrast adjustment, which can fit
best viewing angle.
* Microcomputer circuit provides special function & offers
high accuracy.
* Powered by 006P DC 9V battery or DC 9V adapter.
1
2. APPLICATIONS
This meter is specially developed for measuring or
monitoring electromagnetic field, for example:
cell-phone station, hospital equipment, radar ,
micro-wave oven, radiation work, TV antenna , Radio
station , welding equipment , baking- equipment,
television , computer , factory, laboratory , and other
environment...etc.
3. SAFETY INSTRUCTIONS
Danger
* For worker's safety, be aware that persons with
electromagnetic implant ( e.g. cardiac-pacemarker ) are
subject to especial danger in some case.
* Particular to observe the local safety regulations of the
operator of the equipment.
* Before using the device, it need to know that how to
setting " alarm-limit " value ( refer to page 10 ).
Attention
* Claims by some scientists that long term exposure to
electromagnetic field may be the cause of childhood
leukemia & other forms of cancer.
* Complete answers to any of these and related
questions are not currently available. At the present
time the most common practice is to avoid excess
exposure over long period of time.
2
* Complete answers to any of these and related
" Prudent Avoidance " as stated by the Environmental
Protection Agency(EPA) USA is recommended.
* According to ICNIRP of reference levels to time-varying
electromagnetic fields. The E-field strength levels are:
General public
Frequency range e-field strength (V/m)
10 to 400 MHz 28
400 to 2000 MHz 1.375 x f^1/2
2 to 300 GHz 61
Occupational
Frequency ran
g
e e-field strength (V/m)
10 to 400 MHz 61
400 to 2000 MHz 3 x f^1/2
2 to 300 GHz 137
3
4. SPECIFICATIONS
4-1 General Specifications
Circuit Custom one-chip of microprocessor LSI
circuit.
Display LCD size : 58 mm x 34 mm.
Measurement V/m, mW/cm^2, W/m^2.
Unit
Accuracy < 2 dB.
Probe structure 3 Axis.
Probe Input 50 OHM
Impedance
Frequency Two points selection : Normal, 2.45 GHz.
Selection
Sensor Semiconductor
Structure
Data Hold Freeze the display reading.
REC Function Record Maximum & Minimum value.
Power off Auto shut off saves battery life or
manual off by push button.
* Can default auto power off or manual
power off.
* When default auto power off ,
power will off automatically after
10 min. if no button be pressed.
Peak Hold To latch the peak measurement value.
Alarm Setting Buzzer will sound when display over the
setting value.
Sampling Time Approx. 1 second.
Low Battery When display show Low battery
Indicator Indicator, it should chan
g
e the batteries.
Data Output RS 232 PC serial interface.
Operating 0 to 50 .℃
Temperature
Operating Less than 80 %RH.
Humidity
4
Power Supply DC 9 V battery ( 006P )
* Heavy duty or Alkaline type.
DC 9V adapter input.
Power Current Approx. DC 5.95 mA
Weight 425 g/ 0.94 LB.
Dimension
Main instrument :
200.0 x 76.2 x 36.8 mm
Probe :
70 mm ( diameter) x 240 mm ( length)
Accessories Instruction manual.........................1 PC
Included EP-05H Probe.............................. 1 PC
Memory card for EP-05H.................1 PC
Hard carryin
g
case, CA-06..............
.
1 PC
Optional RS232 cable, UPCB-02.
Accessories USB cable, USB-01.
Data Acquisition software, SW-U801-WIN.
4-2 Electrical Specifications ( 23 ± 5 )℃
Strength Range Resolution Effective Value
0 to 200.00 V/m 0.01 V/m > 1 V/m
0 to 99.999 W/m^2 0.001 W/m^2 > 0.03 W/m^2
0 to 9.9999 mW/cm^2 0.0001 mW/cm^2 > 0.0003 mW/cm^2
Frequency Range Accuracy Test Point
50 MHz to 3.0 GHz * < 2 dB * 60 V/m
Remark:
* The above accuracy is specified base on the
measurement frequency within 100 MHz to 2.5 GHz.
* Measurement under other frequency range ( below
100 MHz and over 2.5 GHz ), the reading value just
for reference only.
* For precision measurement consideration, it should
select the " Frequency Team point " to the
convenient points ( normal or 2.45 GHz ).
5
5. FRONT PANEL DESCRIPTION
Fig. 1
5-1 Display 5-10 Probe Memory Card
5-2 Power Button 5-11 DC Adapter Input Socket
5-3 Hold / ESC Button 5-12 RS-232 Output Terminal
5-4 REC / Enter Button 5-13 LCD contrast adj.
5-5 Freq. Team Button 5-14 Battery Cover
5-6 Unit Button 5-15 Stand
5-7 Peak Hold Button 5-16 Reset Button
5-8 Alarm Set / Start Button 5-17 Probe Sensing Head
5-9 Probe Input Socket 5-18 Probe Plug
6
6. MEASUREMENT CONSIDERATION
1)Connect the " Probe Plug " ( 5-18, Fig. 1 ) into the
" Probe Input Socket " ( 5-9, Fig. 1 ).
2)Plug in the exclusive " Probe Memory Card " ( 5-10, Fig.
1 ) into the front end socket of meter.
Remark :
* Probe memory card is saved the Probe's
character into the internal memory circuit.
* Each probe should cooperate its own exclusive
" Probe Memory card ", do not plug the
another card, otherwise the accuracy will exist
certain deviation.
* If intend to make the measurement precisely.
Make sure to use the " Frequency Team Button " ( 5-5,
Fig. 1 ) ) to select the convenient point that according
the measurement object.
Consideration :
* There are two frequency selection points :
Normal, 2.45 GHz.
* The default selection is " Normal ", however if
the measurement frequency is microwave or
its frequency is near " 2.45 GHz ", it should
select to " 2.45 GHz " will get the high
precision.
7
3)The meter is build in the 3 axis ( X, Y, Z ) EMF sensors,
the circuit measure each X, Y, Z sensor's EMF value, then
the CPU will calculate the total EMF value according
the following formula :
X : The EMF value that sensing from the X direction.
Y : The EMF value that sensing from the Y direction.
Z : The EMF value that sensing from the Z direction.
7. MEASURING PROCEDURE
7 -1 Buttons instructions
Buttons Function
Power Button Press this key to power on or off.
Hold Button Press this key to freeze the reading value.
ESC Button When operate " SET " functions, press this
key to escape..
REC Button Press this key to record maximum or
minimum value.
Enter Button When operate " SET " functions, press this
key to enter value.
Freq. Team Press this key to select the convenient
Button object's frequency value.
Two points selection : Normal, 2.45 GHz.
Unit Button Press this key to select V/m,W/m^2,
mW/cm^2 of strength units.
Peak Hold Press this key to latch peak value during
Button the measurement.
Alarm Set Press this key to setting alarm high/low
/Start Button limit or start alarm function.
8
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