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8253, 3M 8253 Dáileacháin - Electronics-ic.com
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Iontráil cuid uimhir iomlán nó páirteach monaróir le ar a laghad de 3 litreacha nó uimhreacha
Is íomhá le haghaidh tagartha amháin.
FLOOR MAT ESD DISSP 3-LAYER GRY
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Static Control, ESD, Clean Room Products
Ground Cord (2), Ground Snap (2)
The basic purpose of conductive work surfaces is to
provide a surface that is free of static charge and also is
capable of removing the static charge from conductive
items placed on it. The total resistance to ground
determines the level of charge and rate at which it will be
drained. A resistance to ground of 1000 megohms or less is
required on an 8200 mat to drain a charge to a level of 100
volts or less in one second from a person or tote box
charged to 5KV (ref.1, 2).
Measuring the resistance of the mat requires a high voltage
megohmmeter. The megohmmeter must have a test voltage
of 50-100 volts and a meter range of 0-1000 megohms. The
ground lead of the megohmmeter is attached to the ground
points of the mat. The other lead of megohmmeter is
attached to an electrode that is described in both ASTM F
150 and NFPA 56A paragraph 4-6.2.7(b).
The resistance to ground should be greater than 106
ohms and less than 109ohms. if the resistance is less than
106ohms, an alternate path to ground has been established
which bypasses the one megohm resistor in the ground
cord. If the resistance is greater than 109ohms, the ground
connection has been interrupted.
Mats should be periodically cleaned with a detergent and
water solution. To reduce the possibility of leaving a
residue, detergents (rather than soaps) should be used.
Powdered detergents such as Tide®, Ajax®, etc. should be
added to water at a 1-2% concentration, liquid detergents
such as Wisk®, All®, etc. at a 2-3% concentration, and
general purpose cleaners such as 409®, Mr. Clean®, etc. can
be used full strength.
Normally, only a cloth that is thoroughly wetted with the
detergent solution is needed to wipe off the mat; however,
hardened stains may require brushing with a semirigid
bristled brush. The wiping or brushing action should be in a
circular motion to ensure removal of the particles from the
surface depressions. Extremely soiled mats may require
several repeated cleanings with a water rinse between each
cleaning. The water rinse should consist of wetting a cloth
with clean water and wiping the surface to remove loosened
The final step should be to use a cloth dampened with
isopropanol and wipe the mat to remove any organic
contamination as well as the residual detergent. Avoid
using excessive isopropanol because the bottom foam layer
will absorb the solvent and cause the mat to swell.
Regardless of the technique used to clean the mats, the
previously described resistance measurement should be
performed to verify that the mat is functional.
Note: Read all Health Hazard, Precautionary, and First Aid
statements found in the Material Safety Data Sheet (MSDS)
and/or product label of cleaning materials prior to handling
1. D. M. Yenni, Jr. "Basic Electrical Considerations in
the Design of a Static-Safe Work Environment", Proc.,
(NEPCON/WEST), March 1979, pp. 273-284.
2. J. R. Huntsman, D. M. Yenni, Jr., "Test Methods for
Static Control Products", Proc., EOS/ESD Symposium
Maintenance of Static Control
Technical Brief – July, 1983 No. 113
8253 Achoimre na n-ábhar
The basic purpose of conducti ve w ork surfaces is to provide a surface that is free of static char ge and also is capable of removing the static char ge from conducti ve items placed on it. The total resistance to ground determines the le vel of char ge and rate at which it will be drained. A resistance to ground of 1000 megohms or less is required on an 8200 mat to drain a charge to a le v el of 100 volts or less in one second from a person or tote box charged to 5KV (ref.1, 2). Resistance Measurement: Measuring the resistance of the mat requires a high voltage megohmmeter . The megohmmeter
3 Electronic Handling & Pr otection Division 6801 Riv er Place Blvd. Austin, TX 78726-9000 http://www .3M.com/ehpd Litho in USA. © 3M IPC 1999 98-0798-0949-1(3-5-1.0)TR 40% Pr e-consumer waste paper 10% P ost-consumer waste paper Important Notice All statements, technical information, and recommendations related to 3M’ s products ar e based on information believed to be reliable, but the accuracy or completeness is not guaranteed. Before using this pr oduct, you must evaluate it and determine if it is suitable for your intended application. Y ou assume all risks and liability associate
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Iontráil cuid uimhir iomlán nó páirteach monaróir le ar a laghad de 3 litreacha nó uimhreacha
Ceisteanna Coitianta / Cabhair
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