I'm pretty sure I already know the answer, but... - Page 1
Forum section: electronics / beginners

author: GadgetBoy
author_rank: Regular Contributor
timestamp: October 17, 2018, 06:40:44 am
content: Shouldn't ESD safe ceramic tweezers be non-conductive?Sent from my ONEPLUS A3000 using Tapatalk

author: Kirkhaan
author_rank: Frequent Contributor
timestamp: October 17, 2018, 06:45:02 am
content: They have to be conductive to get rid of ESD charge I would say...

author: GadgetBoy
author_rank: Regular Contributor
timestamp: October 17, 2018, 06:46:50 am
content: I thought the idea was to not conduct ESD from your body into your project. Like ceramic trim cap adjusters.Sent from my ONEPLUS A3000 using Tapatalk

author: ataradov
author_rank: Super Contributor
timestamp: October 17, 2018, 06:57:37 am
content: Quote from: GadgetBoy on October 17, 2018, 06:46:50 amNope. They need to dissipate the charge. They also work in conjunction with your wrist strap. Without the wrist strap, they are not very effective. As much as they are effective in a first place.Trim cap adjusters are ceramic to not introduce additional inductance and capacitance, not because of ESD protection.

author: GadgetBoy
author_rank: Regular Contributor
timestamp: October 17, 2018, 07:07:27 am
content: Quote from: ataradov on October 17, 2018, 06:57:37 amNow that you say that, it makes sense. I was thinking the point of the ceramic tweezer tips was complete isolation from the circuit (like the screwdrivers).Sent from my ONEPLUS A3000 using Tapatalk

author: tooki
author_rank: Super Contributor
timestamp: October 17, 2018, 07:09:59 am
content: Quote from: GadgetBoy on October 17, 2018, 06:40:44 amThis is also why you’ll never find simultaneously ESD-safeandVDE insulated screwdrivers and pliers: the former is achieved by making the tools conductive, while the latter is extra-insulated!

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 17, 2018, 07:56:52 am
content: Quote from: ataradov on October 17, 2018, 06:57:37 ami thought the idea is to avoid being electrocuted when working on live circuit unintentionally. luckily i havent buy otherwise i'll get dissapointed before reading this thread. but well 200ohm is better than 0 ohm and possibly damaging some parts of my current metalic tweezer, i need to stay in focus.

author: tooki
author_rank: Super Contributor
timestamp: October 17, 2018, 08:50:23 am
content: VDE insulated tools are for working on live circuits.

author: rsjsouza
author_rank: Super Contributor
timestamp: October 17, 2018, 05:14:03 pm
content: Quote from: GadgetBoy on October 17, 2018, 07:07:27 amIsolating materials accumulate static charges (paper, plastics, fabric, styrofoam) exactly due to this: the charges can't really flow away from the material's body.However, 0\$\Omega\$ resistance can also be very damaging to devices - the charge flows too fast and creates high current surges that can damage the device. If you short your tweezers to ground and the device has a large charge buildup, you can damage it as the charges flow away from the device too fast. Although the 200\$\Omega\$ alone can help reduce this surge, it may be insufficient if the charge amounts hundreds or thousands of volts. That is why Ataradov mentioned the tweezers require the ESD strap as well, which has a typical resistance of 1M\$\Omega\$ so it can severely limit the surge of charges flowing away from the device.Quote from: Mechatrommer on October 17, 2018, 07:56:52 amThe ESD strap and equipmentcannotbe used in high voltage installations.

author: BravoV
author_rank: Super Contributor
timestamp: October 18, 2018, 04:41:57 am
content: Quote from: Mechatrommer on October 17, 2018, 07:56:52 amAny ESD for electronics protection related tools/equiments are NOT designed/made for protecting human life.