View Full Version : Anti-static wrist strap

bk T
19-11-2010, 08:27 PM
Just got myself an anti-static wrist strap, and out of curiosity, I tested the two terminals (clip at one end and 'button' at the other) with a multi-tester for continuity. Apparently, there seems to have no continuity between the two terminals! Is there a resistor or something like that between the terminals or it's faulty? Borrowed one (exactly the same) from a mate and the test result is the same! How does it work if there's no continuity between the wrist and the 'earth'.:confused:

Could someone here enlighten me on this, please. :thanks

19-11-2010, 08:40 PM
Have a read of this (http://en.wikipedia.org/wiki/Antistatic_wrist_strap)

19-11-2010, 08:41 PM
Is there a resistor ...

About a 1Meg resistor apparently.

19-11-2010, 08:43 PM
Clever you! You've discovered they're all bollox!
Wonder if a bit of moisture would aid in achieving a contact - try wearing the strap as normal. Hold one terminal of your tester in the hand that has the wrist strap attached. Then try prodding the other terminal against the other end of the strap and see if anything flows.

Maybe they need a bit of voltage to achieve some flow? There was a suggestion in another thread today that the static can run to thousands of volts.

bk T
19-11-2010, 08:46 PM
Have a read of this (http://en.wikipedia.org/wiki/Antistatic_wrist_strap)

Thanks, wainu. :)

19-11-2010, 08:50 PM
Credit once again to Wainui.
Seems there's a heap of resistance so that you are less likely to carry a current if you touch something live!
There's been some brains applied to their design! Protection for the appliance is primary, but protection for the worker is also included!

19-11-2010, 09:42 PM
There was a place I used to work at , one of the techs every so often had to stop working on a PC for the rest of the day. He would get static discharge on almost any thing he touched that has metal or a surface that could conduct.

Bit like you getting a "Zap" from a car sometimes (best way to explain it) a bit like This picture (http://www.imagef1.net.nz/files/static_discharge.jpg) but worse. He was a real "electric" guy you could say :p

Even the anti-static bands were no good, and we had to wear one when working on PC's (company rules)

20-11-2010, 10:20 AM
During the week The Press had an advert for one of the local IT training organisations showing a guy working on a PC.
All I can remember of the advert is that he wasn't wearing a wristband.

20-11-2010, 05:50 PM
You need to touch the case. The case needs to be plugged into a wall socket. Does not have to be on - the wall socket that is.
Earth means to earth or the ground.