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Acoustimeter

User Manual

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Summary of Contents for Acoustimeter

Page 1: ...Acoustimeter User Manual ...

Page 2: ...outside please cover the instrument in a plastic bag that does not have holes in it Clean the case using a damp cloth if necessary and do not use detergents This instrument is not intended to be serviced by the user neither does it need any special maintenance Unscrewing the case will void the guarantee This instrument is sensitive to heat and impact Exposing the instrument to high temperatures or...

Page 3: ...ntents Safety Instructions 2 Technical Specifications 4 Introduction 5 Layout of the meter 6 Operation and use 7 LED displays 13 Troubleshooting 14 Exposure Guidance 16 Guarantee 18 Approvals and Contact 19 ...

Page 4: ...rd at levels below 0 02 V m The LCD displays peak hold since turned on peak and average values Peak LED Scale Points updated c 100 ms 0 02 0 03 0 05 0 07 0 1 0 2 0 3 0 5 0 7 1 1 5 2 3 4 5 6 V m Average 6400 samples updated c 250 ms 1 5 10 25 50 100 250 500 1 000 2 500 5 000 10 000 25 000 50 000 100 000 µW m2 Power c 90 125 mA at 3 volts 2xAA Alkaline or NIMH rechargeable cells 1 2 1 5V Battery Lif...

Page 5: ...ience gained from many years of practical RF and microwave measurements using a wide variety of professional instruments Readings are shown on both an LCD display and two series of graduated LED lights The LEDs update rapidly and allow you to quickly gauge the levels in an area and find any hot spots The Acoustimeter also has a loudspeaker and audio output socket for headphones or an audio recorde...

Page 6: ...6 Layout of the meter Key 1 Display 2 Peak signal LEDs 3 Average power LEDs 4 Audio jack mono 3 5mm 5 Volume control 6 On Off switch 7 Internal Antenna 8 Loudspeaker 9 Battery compartment ...

Page 7: ...ay from the top of the instrument as the antenna is located inside the case at the rear towards the top The Acoustimeter can be located upright on a surface but people nearby can still affect the RF microwave levels Adjust the volume to suit level usually somewhere about mid volume is best only use maximum with weak signals The instrument will display the peak signal strength and the average power...

Page 8: ...ng measured until the instrument is turned off and on again If there is hardly any noise with the volume turned up then the instrument is not detecting any amplitude modulated i e pulsing signals Various sounds represent the amplitude modulation and digital pulsing of RF signals detected by the instrument It is sometimes possible to hear voices and music when very close to powerful medium and shor...

Page 9: ...tively low exposure levels Digital and Analogue Most modern wireless devices use a digital system of communicating These include mobile phones WiFi Cordless phones DECT Digital TV DAB Radio Many modern digital systems turn the signal on and off at high speeds to represent data often with extra gaps between data bursts This produces a non continuous signal which we describe as pulsing The Acoustime...

Page 10: ...ould be similar as the signal is continuously on while it is being used However because most digital systems spend a large proportion of their time not transmitting the average level does not represent the actual waveform even though it is technically accurate as shown in the diagrams below ...

Page 11: ... this for the average power There have now been hundreds of studies finding non thermal effects from modern wireless communication signals This requires a change in what is measured to suit much lower signal levels with different characteristics We believe that peak signal strength is the most appropriate way to measure complex digitally modulated often non continuous signals in a meaningful manne...

Page 12: ...he EMFields website has an RF unit converter for CW signals on this page http www emfields solutions com rf What do the LED colours mean Our peak signal strength scale is coloured based on the levels that electrosensitive people report as adversely affecting their health Below 0 05 volts per metre V m few people report ill effects so these are green Between 0 05 and 0 5 V m some individuals report...

Page 13: ...13 1 W m2 1 000 000 µW m2 100 µW cm2 0 1 mW cm2 ...

Page 14: ...nt readings are varying Make sure your fingers are clear of the antenna Modern signals pulse and peak signals are not consistent The instrument is sensitive and picks up these variations Regular high blips every few seconds may be due to a rotating radar transmitter or a WiFi signal The peak signal is high but the average signal is low This is to be expected from many modern pulsing digital microw...

Page 15: ...on what is being measured Many budget meters incorrectly display a high peak power derived from peak signal strength as if it were a CW signal It still makes a noise when inside a headnet or behind my screening The audio section of the Acoustimeter is sensitive so even low signals can seem quite loud Check the figures that the Acoustimeter is displaying A 99 9 reduction of 100000 µW m2 to 10 µW m2...

Page 16: ...station masts can be higher 900 1800 2100 USA City Dweller max FCC 1999 30 300000 Wien Vienna Sum of GSM Italy 2003 each base station aim Lichtenstein law from 2013 900 1800 2100 Salzburg 1998 2000 Sum of GSM BioInitiative 2007 30 300000 EU Parliament bill GD Wissenschaft STOA GSM 2001 900 1800 2100 Typical US EPA 1980 mainly FM TV 30 300000 Salzburg 2002 outside houses aim 900 1800 2100 BioInitia...

Page 17: ...2000 3 not spec not spec 900 1800 2100 3 0 024 24 000 900 1800 2100 2 0 01 10 000 30 300000 2 0 01 10 000 Sum of GSM 1 9 0 01 10 000 900 1800 2100 0 6 0 001 1000 Sum of GSM 0 6 0 001 1000 30 300000 0 6 0 001 1000 900 1800 2100 0 2 0 0001 100 30 300000 0 13 0 00005 50 900 1800 2100 0 06 0 000 01 10 30 300000 0 03 0 000 005 5 900 1800 2100 0 02 0 000 001 1 900 2100 0 00001 3 e 11 0 000 03 300 3000 0...

Page 18: ...ee page 19 for details and to arrange a return if required The meter is guaranteed to be free of manufacturing defects but not against wear from normal use nor damage caused by water or by physical impacts such as from dropping it Please note The Acoustimeter is a very sensitive meter It has a degree of overload protection built in but it should not be used next to high powered RF transmitters tha...

Page 19: ...N61000 6 3 2001 A11 2004 EN61000 6 1 2001 EMC standards and also meets ROHS 2 2011 2002 95 EC and WEEE 2012 19 EU 2002 96 EC The Waste Electrical Electronic Equipment WEEE Directive requires that unwanted electronic equipment must be disposed of using specialist recycling Your Acoustimeter can be returned to us for recycling UK local waste recycling centres also provide free collection points for ...

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