Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Wireless wrist strap

#30990

Wireless wrist strap | 15 October, 2004

Hi,

I would like to ask you if you have used wireless wrist strap or ground strap? What is the advantges and effect on the assembly line. How to test and how to check if this is working or not.

Thank you. Your help is highly appreciated.

Arman

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#31001

Wireless wrist strap | 18 October, 2004

OK you have peaked my curiosity. Who makes a wireless wrist strap. And how would you ever dissipate static to a ground if it is wireless? Where would the static go?

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#31002

Wireless wrist strap | 18 October, 2004

I was also thinking the same thing...

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#31003

Wireless wrist strap | 18 October, 2004


Rob

#31006

Wireless wrist strap | 19 October, 2004

Far be it from me to introduce some additional scepticism, but that looks like an ordinary wrist strap, with standard push fit popper for connection to earth. If it was a wireless device surely it wouldn't need a connection point for a wire?

Rob.

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Grayman

#31010

Wireless wrist strap | 19 October, 2004

Hi all,

Based on the data from the website the wireless wrist strap is a fake device!!! Wow! can you give me companies who promote these kind of product in your area? Maybe they can provide us much more details on why they still sell this type of product that doesn't work.

Arman

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HOSS

#31011

Wireless wrist strap | 19 October, 2004

Arman,

We introduced wireless wrist straps here on a small scale for safety related jobs such as mass lead trimming. These straps operate by the "Corona" effect which, as it turns out amounts to this: You need to drink a case of that swill to convince yourself these straps really work. You can read up on the Corona effect and decide for yourself. Think about this - If this principle had any merit, Desco, 3M and the like would be offering them at exhorbinant prices.

We're pulling them from our floor and taking our chances with the hazardous operations or maybe going with ankle straps instead.

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#31019

Wireless wrist strap | 19 October, 2004

Seeing a product such as this and thinking about simple engineering. Every lightning rod I have ever seen on a building, home, tower, etc... had this long metal device called a "conductive wire" that runs into the ground.

I'll stick with the lightning rod approach. later marc

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Rob

#31023

Wireless wrist strap | 20 October, 2004

For more information on Hoss's Corona effect see the following link: http://www.howmanywouldittake.com/

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Grayman

#31025

Wireless wrist strap | 20 October, 2004

Rob,

I have checked the site and I think it doesn't say about the topic.

Thanks! Arman

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Rob

#31026

Wireless wrist strap | 20 October, 2004

Sorry Arman,

English humour.

Cheers,

Rob.

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Grayman

#31027

Wireless wrist strap | 20 October, 2004

Hi,

Do you have the site for the "corona effect"?

Thank you, Arman

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Rob

#31029

Wireless wrist strap | 20 October, 2004

Hi Arman,

There are a number of sites dealing with the Corona Effect all with different slants in how it applies to them (Astonomers, physicists, Radio enthusiasts, etc.), but the basic definition I remember from my physics lessons at school is as follows:

The spontaneous dispersal of an accumulated electric charge. An example being lightning - the atmosphere becomes so charged that the air is ionised, providing a route to ground for the electricity to flow, and the charge to dissapate.

I'm guessing this is when dielectric breakdown of air occurs, but feel free to correct me if anyone knows better.

So, theoretically we could charge our operators up to a level where the corona effect would work, but they may not be too happy (or able)to carry on very productively.

Best regards,

Rob.

Here are a couple of simplistic links:

www.phy.duke.edu/~rgb/Class/phy42/node16.html

www.442.com/oldsfaq/ofign.htm

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Grayman

#31030

Wireless wrist strap | 20 October, 2004

Rob,

OH I see.... We only drink beer when we have some ladies dancing N-k43d.... Come by the Philippines and I'll give you a tour. Honest, I will make your trip memorable

Arman

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Rob

#31032

Wireless wrist strap | 20 October, 2004

We find the beer helps them look better - ie. the "Corona Effect" - or Beer Goggles!

Thanks for the offer,

Rob.

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Grayman

#31033

Wireless wrist strap | 20 October, 2004

Rob,

Thank you for your info. Appreciated it very much. it will help.

Arman

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-Gill-

#31115

Wireless wrist strap | 27 October, 2004

Can anyone provide me some information on as to how a "Continuous Wrist Strap Monitor" can be made. I would really appreciate neone's help...Thanks.

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Rizza

#39832

Wireless wrist strap | 21 February, 2006

I'm also looking at this wireless wrist strap. try this website: http://www.esdjournal.com/techpapr/sfowler/wireless.htm for the evaluation of this strap.. well now..im looking for alternative that works the same in convenience but different in principle...

Gill, we have that monitoring in semicon but not my line of job...maybe you can ask ESD experts from semicons.

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