|
<1.0E01 = <10 ohms) |
Copper, Steel, Water Etc.
|
In the case of static
control this range is too conductive. It can present
potential safety hazards AND eliminating static too
quickly can be nearly as bad as not eliminating it
in the first place! |
|
1.0E02 =
100 ohms) |
|
1.0E03 = 1,000 ohms =
1K ohm |
|
1.0E04 =
10,000 ohms = 10 Kilohms |
Static
Conductive Flooring |
This range of flooring
is static conductive. For Electronic manufacturing
it should be above 1.0E04 and less than 1.0E06. See
ANSI ESD S20.20-2014 for more details. |
|
1.0E05 = 100,000 ohms
= 100K Ohms) |
|
<1.0E06 = <1,000,000
ohms = <1 Megaohms |
|
>1.0E06 = >1,000,000
ohms = > 1 Megaohms |
Static Dissipative table top mats, work surfaces and
flooring
|
This range of static conductivity
is used for table top mats, ESD work surfaces, many
esd smocks and static dissipative flooring. It is a
must for work surfaces and smocks (and many other
items). It is an option as a choice for ESD flooring
although some static dissipative flooring does not
work well in achieving mandatory combination
resistance results of carts chair and technicians. |
|
1.0E07
= 10,000,000 ohms = 10 Megaohms |
|
1.0E08 = 100,000,000
ohms = 100 Megaohms |
|
Less THAN
1.0E09
= <1,000,000,000 ohms = 1 Gigaohm |
|
More Than1.0E09
= >1,000,000,000 ohms = >1 Gigaohm) |
99% of items used
in an ESD area will not be compliant in this range
|
Any ESD floor or table top mat
above 1.0E09 will fail ANSI ESD S20.20-2014, page
4, table 2. The combined resistance of a
technician, their heel grounders and the ESD floor
will FAIL if above 1.0E09 as will combination
resistance values of chairs and carts in concert
with the flooring. Many floor mats will do an
excellent job of reducing nuisance static above
1.0E09 but reducing nuisance static is not a part of
ANSI ESD S20.20 |
|
<1.0E10
= <10,000,000,000 ohms = <10 Gigaohms |
|
>1.0E10 =
10,000,000,000 ohms = >10 Gigaohms |
Standard Epoxy Flooring, VCT and many carpets |
This range is fairly insulative. Standard VCT and
epoxy flooring normally fall in this range. Nuisance
static can be problematic and charge generation
while walking will exceed 100 volts (the limits set
in ANSI). As insulative properties increase so will
static voltage and static decay. In the case of
standard carpet you my "feel" the discharge when you
touch a grounded object. The threshold for this is
greater than 4,000 volts! Ouch! |
|
1.0E11 = 100,000,000,000 ohms = 100 Gigaohms |
Plexiglas |
|
1.0E12 =
(1,000,000,000,000 ohms) - 1 Teraohm |
Switchboard Matting |
