EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: dsab on April 17, 2014, 09:49:46 pm
-
Is this also safe when using an anti-static mat, that your power point(powerbar) is switched off & plug into the outlet. Also that the PSU is switched off and plug into the powerbar. Use a motherboard Standoffs on the psu screw hole & attaching the alligator clip to the standoffs.
Is this okay? is the mat grounded?
This is a brand new build.
What if it’s not a brand new build, what do u suggest?
-
Hi
normally recent static mat have >10 meg and up ,so in theory it safe to let a PCB powered and on the mat
(for some time mat have go from conductive to disipative for safety reason typical spec was Surface resistivity is 10^8– 10^9 Ohms. )
but ideally try to avoid it ,since even if it safe it may affect circuit behaviour
but old mat may much lower
and mat must be connected to EARTH whit supplied cable ,most of time in that cable it put for safety a 1 meg resistor
-
Even a 1000V/4.2 Gigaohm megger can't measure the resistance of the top layer of a dual-layer mat (I've tried), so I doubt it will effect any circuit you put on it. It's also not really what he asked.
Turning off the power to the power strip or PSU should not disconnect ground, so you should be grounded. It wouldn't hurt to check for continuity between the standoff you're using and the ground pin on the power strip.
-
Thanks Nerull for answering my question, I should be grounded if I do it that way.