Daan,
        Better safe than sorry, and you don't have to have the 'burden fo
proof' for customer questions. Our standard policy is all operators (and
supervisors/engineers/etc) must plug in a wrist strap when working or
handling assemblies at a workstation. We also require the use of dual
contact wrist straps and constant monitors to assure that the wrist strap is
working properly at all times, not just when they check it in the morning.
After morning checks, some operators may loosen the strap (providing
intermittent or no contact). Constant monitoring boxes prevent this from
occuring. With a dual operator monitor running about $125, it's cheap
insurance compared to troubleshooting and replacing high dollar components.

Mike McMonagle
PCA Process Engineering Supervisor
K*Tec Electronics
1111 Gillingham Lane
Sugar Land, TX  77478
(281) 243-5639 Phone
(281) 243-5539 Fax
[log in to unmask]

> -----Original Message-----
> From: d. terstegge [SMTP:[log in to unmask]]
> Sent: Friday, November 05, 1999 3:28 AM
> To:   [log in to unmask]
> Subject:      [TN] Wrist wraps for seated operators
>
> Hello Technet,
>
> We've recently received some complaints from a customer who is not happy
> with the fact that our operators don't wear wrist wraps during seated
> operations like handsoldering and inspection. Our factory relies on
> grounding through the (conductive) chairs, ESD-shoes, conductive floor and
> ESD-workbenches, but the chairs are tested only once per year, which is
> obviously less frequent then one would test wrist wraps.
> Is the customers concern justified, and should we introduce wrist wraps ?
>
> Daan Terstegge
> Unclassified
>
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