GQ Electronics Technical Support Forum Active Users: / Visits Today:
Highest Active Users:
GQ Electronics Technical Support Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 GQ Electronics Forums
 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 Accuracy range RF compared to Safe & Sound Pro II
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

Jo

16 Posts

Posted - 12/02/2022 :  11:38:32  Show Profile  Reply with Quote
Hello,

I thought the EMF-390 was accurate since I also own a Cornet 88 that shows similar values but then I bought a Safe and Sound Pro II, much more expensive but also much more sensitive. Most of time the RF values are doubled on the Safe and Sound and they are instantaneous (several measurements per second). How do you account for such discrepancies?

For instance 0.2v/m on EMF-390 vs 0.4v/m on S&S.

Itís frightening because I donít know which one to trust.

Whatís the accuracy range on the EMF-390? Itís 6dB on Safe and Sound.

Thanks,

Jo

Edited by - Jo on 12/02/2022 11:41:04
Reply #1

EmfDev

2051 Posts

Posted - 12/05/2022 :  10:50:46  Show Profile  Reply with Quote
Hi Jo, what is the range of the safe & sound pro II? Since 2 of the meters measure in similar range, it may be the S&S increased their readings to make it look more sensitive. You can also easily adjust the readings on EMF 390 by changing the RF gain in the settings.
Go to Top of Page
Reply #2

Jo

16 Posts

Posted - 12/05/2022 :  11:25:56  Show Profile  Reply with Quote
Hello, here is what I found on their website:

ę†This meter is a 3rd party certified RF detector with effective measurement range of 200 MHz to 8 GHz, true response detection range 400 MHz to 7.2 GHz (+/- 6dB).†Ľ

What does that mean? Is it similar to the EMF-390 and how can I efficiently compare both?

Thanks!

Jo
Go to Top of Page
Reply #3

EmfDev

2051 Posts

Posted - 12/05/2022 :  11:34:07  Show Profile  Reply with Quote
What about the max mW/m2 that it can measure? The EMF-390 is from 10MHz to 10GHz. You can just use some sources to check readings like wifi router or microwave. it will be hard to compare of course since RF is not constant. Unless you have a walkie-talkie (generates constant RF) or anything that can generate constant RF. And not pulsing.
Go to Top of Page
Reply #4

James B

6 Posts

Posted - 01/19/2023 :  06:20:30  Show Profile  Reply with Quote
quote:
Originally posted by Jo

Hello, here is what I found on their website:

ę†This meter is a 3rd party certified RF detector with effective measurement range of 200 MHz to 8 GHz, true response detection range 400 MHz to 7.2 GHz (+/- 6dB).†Ľ

What does that mean? Is it similar to the EMF-390 and how can I efficiently compare both?

Thanks!




Hello Jo

The +/- 6dB is the accuracy of the Safe and Sound. This gives you an error 0.25 times the true value to 4 times the true value for RF between 400 MHz and 7.2 GHz. For example, if the true RF was 100 mW/m2 the Safe and Sound would display a value between 25 mW/m2 and 400 mW/m2. Across it's entire RF range of 200 MHz to 8 GHz, the error would be larger, possibly +/-10dB or 0.1 times the true value to 10 times the true value.
The EMF 390 is specified from 10MHz to 10 GHz (+/-10dB). Here, for a true RF of 100 mW/m2, the EMF 390 would indicate 10 mW/m2 to 1000 mW/m2. For RF powers between 400 MHz and 7.2 MHz, the EMF 390 may be as accurate or more accurate than the Safe and Sound.

Reference: EMF 390V2 User Guide Revision 1.94

Hope this helps,
James B
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
GQ Electronics Technical Support Forum © Copyright since 2011 Go To Top Of Page
Generated in 0.06 sec. Snitz's Forums 2000