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 3. GQ EMF EF Meter RF Spectrum Power Analyzer
 Unit conversion
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n8xyn

USA
66 Posts

Posted - 05/19/2018 :  14:27:02  Show Profile  Reply with Quote
This website and most others give values in volts per meter square

https://www.home-biology.com/electromagnetic-field-radiation-meters/safe-exposure-limits

The EMF-380 wants alarm values entered in volts CM squared. Do I do a division by 10,000 (100x100) of the value on the website to get the proper value? It just creates values that are so low anything and everything will set an alarm state.

Jim Whitaker
Reply #1

EmfDev

644 Posts

Posted - 05/21/2018 :  09:09:51  Show Profile  Reply with Quote
I'm sorry but the EF alarm wants V/m which is also in the link that you posted.
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Reply #2

n8xyn

USA
66 Posts

Posted - 05/22/2018 :  14:32:53  Show Profile  Reply with Quote
You are right sir now I'm wondering if I'm developing Alzheimer ;-)

Jim Whitaker
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Reply #3

EmfDev

644 Posts

Posted - 05/23/2018 :  08:38:56  Show Profile  Reply with Quote
Maybe you just missed it :D. But that'a helpful article.
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Reply #4

francois

19 Posts

Posted - 01/18/2019 :  14:36:51  Show Profile  Reply with Quote
The article gives values in uW/m2 and equivalents in V/m .

I can see measurements in uW/m2 in the RF value on the EMF-390. For example 170.

However, if I have 170 uW/m2, why do I not see at the same time 0.25 V/m in the EF value (with AllInOne display) (I see 0.0 V/m).

Why are there correlated values in the article but not in the EMF-390?

Does each measure on the AllInOne mode apply only to a specific frequency range? I cannot find that info anywhere.

Another question: In my country, the legal limit for cell phone towers is 3 V/m. How do I convert this to uW/m2?

Thanks!
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Reply #5

EmfDev

644 Posts

Posted - 01/18/2019 :  16:36:16  Show Profile  Reply with Quote
Hi fancois, the EF (V/m) is not calculated from the RF(uW/m2). They are using 2 different sensors.
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Reply #6

francois

19 Posts

Posted - 01/19/2019 :  05:50:55  Show Profile  Reply with Quote
Ok but why does it need a different sensor? Can each sensor only pick up a specific frequency range? Which range is it for each sensor?

Also, why do you use different units for each sensor? Why is RF not displayed in V/m?

Can I manually convert uW/m2 to V/m ?

Thanks.
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Reply #7

flyfoots

1 Posts

Posted - 01/19/2019 :  23:19:42  Show Profile  Reply with Quote
I need to know what software will let me print the history downloaded from the EMF-390.
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Reply #8

EmfDev

644 Posts

Posted - 01/22/2019 :  10:21:43  Show Profile  Reply with Quote
@francois, They are detected in different ways. The frequency ranges are in the user guide EF is from o to no limit, RF is up to 10GHz. We use different sensors for efficiency. And we use those units because it's what most people prefer. You can convert it manually.


@flyfoots, You can use Excel to print it.
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