GQ Electronics Technical Support Forum


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
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

runstop

Canada
1 Posts

Posted - 06/24/2018 :  12:25:25  Show Profile  Reply with Quote
I am trying to determine the right EMF meter for my home. I was going to purchase the Trifield TR2, but I decided to research the budget market to find the best meter. I was pleasantly surprised to discover the GQ EMF 380, but now I am trying to evaluate this meter's accuracy, so I was wondering how the Advanced EMF-380 compares to the TriField TR2? I found the following specifications for each meter, but I am having trouble trying to determine which meter is more accurate. The V/m resolution appears to be more granular for the EMF-380, but it is difficult to understand since the TriField manufacture doesn't specify accuracy using the same format. For example, Electric Field measurements of the EMF-380 specifies "10%+50dgt" but the TR2 reports "5% @ 50/60 Hz". Is the TR2 meter generally more accurate?

What are your thoughts?


Advanced GQ EMF-380 Specifications
EMF (Electromagnetic Field)
  • Triple axis (X, Y, Z) up to 300Mhz
  • Range: 0.00~500mG, 0.00 to 50
  • Resolution: 0. 1/1 mG or 0.01/0.1
  • Frequency: up to 7G Hz
  • Accuracy: (15%+100dgt)

EF (Electric Field)
  • Range: 0V/m to 2000V/m
  • Resolution: 0.1 V/m
  • Accuracy: (10%+50dgt)
RF Field (Radio Frequency Field)
  • Resolution: 0.01#956W/m#178, 0.1#956A/m, 0.1m V/m, 0.001#956W/cm#178, 1dB
  • Frequency: up to 7GHz


TriField TR2 Specifications
AC Magnetic Mode
  • Frequency range 40Hz 100KHz
  • Accuracy: 4% @ 50/60 Hz
  • Maximum Range: 100.0 mG
  • Resolution: 0.1 mG
  • 3 axis

AC Electric Mode
  • Frequency Range: 40 Hz 100 KHz
  • Accuracy: 5% @ 50/60 Hz
  • Maximum Range: 1000 V/m
  • Resolution: 1 V/m
  • 1-axis
Radio Frequency Radiation Mode
  • Frequency Range: 20 MHz 6 GHz
  • Accuracy: 20% @ 1 GHz
  • Maximum Range: 19.999 mW/m2
  • Resolution: 0.001 mW/m2
  • 1 axis

Edited by - runstop on 06/24/2018 13:02:54
Reply #1

EmfDev

344 Posts

Posted - 06/25/2018 :  11:42:10  Show Profile  Reply with Quote
a 5% difference in accuracy is not that much because it's hard to measure the exact EMF value at a fixed position/place.
But the EMF 380 has a lot of functions that the TF2 doesn't have like The 2.4G WiFi Spectrum, 60second graph, etc.
Go to Top of Page
Reply #2

robeyw

USA
12 Posts

Posted - 10/01/2018 :  22:24:56  Show Profile  Reply with Quote
Here I see the spec
EMF (Electromagnetic Field)
Triple axis (X, Y, Z) up to 300Mhz

But GQ EMF-360/ EMF-360+/EMF-380 EMF Multi-Field/Multi-Function Meter User Guide Revision 1.2 Jul-2018 says
EMF (Electromagnetic Field)
o Triple axis (X, Y, Z) up to 150KHZ

Please explain the drastic difference in frequency response.
Go to Top of Page
Reply #3

EmfDev

344 Posts

Posted - 10/02/2018 :  12:46:38  Show Profile  Reply with Quote
That was a mistake, we tested it and can only confirm that the EMF can measure up to 400KHz.
Go to Top of Page
Reply #4

robeyw

USA
12 Posts

Posted - 10/02/2018 :  23:32:18  Show Profile  Reply with Quote
Please post a frequency response plot.
Go to Top of Page
Reply #5

EmfDev

344 Posts

Posted - 10/03/2018 :  13:28:57  Show Profile  Reply with Quote
We don't have it. The observed EMF becomes lower as the frequency goes up.
Go to Top of Page
Reply #6

robeyw

USA
12 Posts

Posted - 10/03/2018 :  16:19:23  Show Profile  Reply with Quote
I will probably buy a 380 in spite of major uncertainties because it has a lot of features and will eventually post electric and magnetic response below 10 MHz.
Go to Top of Page
Reply #7

EmfDev

344 Posts

Posted - 10/04/2018 :  12:37:52  Show Profile  Reply with Quote
Thanks! Sometimes there are firmware updates to improve the device, you can contact customer support to ask
if there's available update for your version if you happen to get one.
Go to Top of Page
Reply #8

robeyw

USA
12 Posts

Posted - 11/18/2018 :  01:12:10  Show Profile  Reply with Quote
>I will probably buy a 380 in spite of major uncertainties because it has a lot of features and will eventually post electric and magnetic response below 10 MHz.

I did get one but the RF noise is so great that I expect to return it, so have not made the measurement but it occurs to me that without some frequency selectivity, wide bandwidth is not useful because for most cases power line frequency will dominate. Adding spectrum analysis for the EF & MF (which you call EMF) functions would be very useful if the sensitivity is sufficient. Is there any chance of adding this capability?
Go to Top of Page
Reply #9

EmfDev

344 Posts

Posted - 11/19/2018 :  10:26:56  Show Profile  Reply with Quote
What do you mean by RF noise? Are you referring to the RF spectrum?
Yes we can do EMF spectrum but it will cost more. This is for general purpose reference measurement. You can return it if it doesn't work for you. Thanks for your feedback.
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 0.09 sec. Snitz Forums 2000