ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
VFD MotorFeeders
by gfretwell. 10/17/17 10:01 PM
What do you do?
by gfretwell. 10/17/17 01:08 AM
Good ol' copper pipe in the fuse holder trick
by HotLine1. 10/16/17 07:16 PM
Generator Cable Sizing
by HotLine1. 10/16/17 07:13 PM
Another generator question
by HotLine1. 10/16/17 07:02 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
241,362 Are you busy
177,314 Re: Forum
168,941 Need opinion
Who's Online Now
0 registered members (), 54 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#63608 - 03/22/06 05:57 PM Gauss Meter  
Tiger  Offline
Member
Joined: May 2005
Posts: 706
Crystal Lake, IL USA
Anyone have experience with a Gauss meter for measuring EMF?

Thanks,
Dave


Work Gear for Electricians and the Trades

#63609 - 03/22/06 07:34 PM Re: Gauss Meter  
JoeTestingEngr  Offline
Member
Joined: Nov 2005
Posts: 790
Chicago, Il.
Dave,
We have at least one at work. Any specific questions? I haven't used it myself but I know at least one other TE who has used it in the field.
Joe


#63610 - 03/22/06 08:24 PM Re: Gauss Meter  
Tiger  Offline
Member
Joined: May 2005
Posts: 706
Crystal Lake, IL USA
Hi Joe, thanks for responding. I have a client with health problems. She wants to test her house for EMF and has suspicions about cell phone use. In reading an article it mentioned shared neutral circuits. My client is going to be testing a residence, so any suggestions for reducing EMFs would be helpful.

Thanks,
Dave


#63611 - 03/22/06 08:57 PM Re: Gauss Meter  
WFO  Offline
Member
Joined: Sep 2005
Posts: 202
Cat Spring, TX
We used one a few years ago when everyone was getting upset about EMF from power lines. Once most of the arguments had been debunked, it kinda fell out of use.
Obviously, you'll get higher readings around running appliances than you will around, say, the wire in the wall.
And if I remember correctly, the strength of the field is inversly proportional to the square (or cube?) of the distance to the source of the EMF. So someone would be much more exposed to something up close like an electric blanket, than they would their breaker panel.

As for cell phones, I would think the RF frequencies would be more of a worry than the EMF.


#63612 - 03/22/06 09:04 PM Re: Gauss Meter  
JoeTestingEngr  Offline
Member
Joined: Nov 2005
Posts: 790
Chicago, Il.
Well Dave, I must be a dead man then. My office is in a traction power substation. I'll read the specs tomorrow but I doubt our gauss meter(s) work at cellphone frequencies. My first question to her would be if it looks like she is watching the "Green Hornet" on any non-LCD color TVs or computer monitors. Purity issues loomed large for us before we switched to LCDs. I'm used to using mu-metal shielding to protect video monitors from monitor speakers, but not protecting humans from EMF. It's funny you mention this now though because I just asked my boss today if he was still going to buy the house under the HV lines. We're all thinking that the jury is still out on that. I think I have read about structural steel bonding and EMF so I will check my stack-o-stuff.
Joe

[This message has been edited by JoeTestingEngr (edited 03-22-2006).]


#63613 - 03/22/06 09:47 PM Re: Gauss Meter  
Tiger  Offline
Member
Joined: May 2005
Posts: 706
Crystal Lake, IL USA
To add perhaps a little too much information, her husband has a tumor in the brain and in the hip of the pocket he carries his cell phone in and is now possibly a rare form of luekemia (if I remember the info. correctly). She's serious about reducing EMFs.

Thanks,
Dave


#63614 - 03/22/06 11:33 PM Re: Gauss Meter  
Sandro  Offline
Member
Joined: Dec 2001
Posts: 444
Stoney Creek, ON, Canada
It's funny this subject came up, just last week I read a home and cottage magazine article about a woman who fought breast cancer and was convinced the emf's in her old house was responsible.

According to her, Watch out for those dimmers!


#63615 - 03/23/06 08:30 AM Re: Gauss Meter  
WFO  Offline
Member
Joined: Sep 2005
Posts: 202
Cat Spring, TX
Not to be cynical, but I'm betting once she finds out where the sources of EMF are coming from, she won't be willing to give them up.

And Yes, older phones with higher outputs were linked to brain cancer in people that used them excessively. Just like testicular cancer in cops from the early radar guns. But again, I don't think EMF is the issue as much as RF.


#63616 - 03/23/06 08:42 PM Re: Gauss Meter  
JoeTestingEngr  Offline
Member
Joined: Nov 2005
Posts: 790
Chicago, Il.
http://www.sypris.com/stm/content.asp?page_id=667

Dave,
This is link that shows the F.W. Bell 6010 meter that we have at work. As I suspected, its frequency response is DC to 20kHz. I think that I would have to go along with WFO in this matter. I would suspect RF heating as the culprit. Having someone with a brain tumor AND one on the hip where a cellphone is carried is pretty compelling. The hip matter is particularly disturbing because you don't think of a phone as transmitting from there. There is always the concept of local oscillator leakage during reception. I never really tried to become an expert on cellphones so I don't know what kind of transmissions occur during on-hook (so to speak) operation.
Should she worry about EMF from her wiring? I doubt it. It probably doesn't cause heating like uW leakage does. Is she willing to use standard telephones with corded handsets and cellphones only in emergencies? Anyway, a spectrum analyzer with a broadband antenna might be better used to track down emissions more harmful than the EMF from the wiring.
Dimmers do mess up the AM talk radio experience, especially at low brightness levels, because of the fast rise times, but I doubt they have ever caused a tumor. Hardening of the eardrum, maybe.
Joe



Member Spotlight
Vlado
Vlado
Croatia
Posts: 28
Joined: February 2011
Show All Member Profiles 
Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.022s Queries: 14 (0.005s) Memory: 0.8013 MB (Peak: 0.9672 MB) Zlib enabled. Server Time: 2017-10-18 14:57:48 UTC