Smogtec esi 24, User Manual, Page: 2 / 7

Proffsmagasinet
In the Standard mode, low-frequency parameters (electrical and magnetic fields) and high-frequency radiation
(microwaves) are measured concurrently.
1. Low frequency - electrical and magnetic fields: High-voltage cables, electrical installations, lighting,
computers, clock radios, etc.
2. High frequency (radio waves and microwaves): Wireless telephone handsets, WLAN, Wi-Fi, mobile radio
transmitters, baby monitors, mobile telephones, etc.
3. Leak radiation from microwave ovens (also high-frequency)
The field strength (LF) and power flux density / radiation density (HF) will increase or decrease depending on:
•
Distance from EM field source
•
Power of source/transmitter
•
Type, design and configuration of transmitter
•
Reflections of radiation in the near surroundings
•
Environmental, landscape and weather factors
•
Shape and shielding characteristics of the building in which measurements are being made
The frequency of the audio signal varies with increasing EM field intensity.
Calibration for Standard mode
(Electrosmog field strength indicated by LEDs)
Low-frequency electric field and magnetic field. Frequency range 16 Hz - 3 kHz.
Readings* for the
esi 24 EMF Indicator
insignifica
nt
low
significanc
e
low
significanc
e
significant significant
very
significant
very
significant
extremely
significant
extreme
ly
significa
nt
Green
Green/
Yellow 1
Yellow 1
Yellow 1/
Yellow 2
Yellow 2
Yellow 2/
Red 1
Red 1
Red 1/
Red 2
Red 2
Alternating magnetic
field*
in nT (nanotesla)
< 20
20… 80 80 … 120
120 …
160
160 …
200
200 …
300
300 …
400
400 …
1000
> 1000
Alternating electric
field*
in V/m (volts per
metre)
< 6
6 … 15 15 … 20 20 … 25 25 … 30 30 … 35 35 … 40 40 … 50
> 50
*
All values are peak values. The readings of individual units may vary slightly from the values given in the tables owing to tolerances in individual electronic components
and possibly due to temperature fluctuations. The units are calibrated using 50Hz alternating fields at an ambient temperature of 20°C and air humidity of 45%.
High-frequency - power flux density / radiation intensity ( microwaves )
Frequency range 50 MHz - 8 GHz, values in µW/m² (= microwatt per square metre).
Readings* for the
esi 24 EMF Indicator
insignifica
nt
low
significanc
e
low
significanc
e
significant
significa
nt
very
significant
very
significant
extremely
significant
extreme
ly
significa
nt
Green
Green/
Yellow 1
Yellow 1
Yellow 1/
Yellow 2
Yellow 2
Yellow 2/
Red 1
Red 1
Red 1/
Red 2
Red 2
Frequencies around
0.9 GHz
*
< 2
2 … 4 4 … 10 10 … 20 20 … 31 30 … 50 50 … 75 75 … 100
> 100
Frequencies around
1.9 GHz
*
< 10
10 … 20 20 … 45 45 … 85
85 …
130
130 …
200
200 …
300
300 …
450
> 450
Frequencies around
2.5 GHz
*
< 20
20 … 40 40 … 100 100 … 200
200 …
300
300 …
500
500 …
750
750 …
1000
>1000
Frequencies around
5.0 GHz
*
< 80
80 … 150
150 …
380
380 … 750
750 …
1100
1100...
1850
1850…
2800 2800…
3900
> 3900
*
All values are peak values. The readings of individual units may vary slightly from the values given in the tables owing to tolerances in individual electronic components
and possibly due to temperature fluctuations. The units are calibrated using 50Hz alternating fields at an ambient temperature of 20°C and air humidity of 45%.
• Notes for measurements made
in the Standard mode.
ELECTRIC FIELD (Low frequency)
Sources of electric fields are all live power lines and cables and all electrical or electronic devices when connected to
the mains supply, electric wiring in walls, extension cables, socket strips and the power cables of devices such as
computer monitors, TVs, clock radios, standard l
amps, printers, etc. Don’t forget fields from floors/intermediate floors,
particularly in wooden structures, and fields from power cables in roof pitches.
Field strength increases with increasing proximity to the source.