----- Original Message -----
Sent: Wednesday, October 02, 2002 4:30
PM
Subject: Re: [TN] ESD ISSUE
Is
it as much a hazard as it is being portrayed? If the conditions are hot
enough that people are uncomfortable wearing smocks, they probably won't be
wearing long sleeve shirts that can dangle in what you're working on. In
fact, they are probably wearing the least they can get away with at their
place of employment - tank tops and shorts if allowed. If they wear a
static strap, and heel strap, are they really in that much ESD risk?
They might be at more risk for safety issues - solder splashes, cuts, etc.,
than ESD issues.
Jim,
Higher humidity can lower
the ESD risk but have them wear the smocks to be safe.
Besides the
humidity levels, it depends on what your operators are wearing.
Cotton, polyester or nylon have different triboelectric properties so build
up charge at different rates and amounts. Think about how much static
builds up on your polyester socks versus your cotton socks in your clothes
dryer at home.
-- Gregg
At 08:00 AM 10/2/2002, you wrote:
Good day Technetters:
I
need some opinions (this may be asking for trouble!). Located in
the
north east, temperature/humidity levels can change on a daily
basis. It has
been our policy that, during summer months when the
humidity is high, the
operators do not have to wear ESD smocks in areas
that are not air
conditioned. There is no hard fast rule as to
what the conditions shall be,
except that a decision is made (by yours
truly) that smocks are optional
when conditions are
uncomfortable. I'm trying to select a specific humidity
level to
use as a criteria for the mandatory wearing of smocks.
I
understand that not wearing ESD smocks poses a risk, but the risk
is
minimized during high humidity conditions. What do you think
of this
policy? Any recommendations on a humidity
level?
Thanks,
Jim Marsico
Senior Engineer
Production
Engineering
EDO Electronics Systems Group
[log in to unmask]
<mailto:[log in to unmask]>
631-595-5879
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