Graham,
I know how I managed a case like this several years ago for my company.
Now realize that ESD rules may have changed.
We were running HiPot test and there was concern for the operator should a
safety system fail. First step, no wriststrap. Second step, since operators
were dissipative footwear, an insulative mat on the conductive floor to keep
the operator at a high resistance level. Third step an ionizing blower mounted
above the station blowing down in front of the card cage and over the floor
mat. We never had an ESD event recorded at these stations over the course
of 3 years of operation.
Some ideas for you. Check the latest ESD Association standards for more.
At somewhere above 120VAC the wriststrap and footwear are not to be used.
Drew Meyer
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