Question on Ionizer flow, we started testing to have the Ionizers off the bench top facing the operator with a wrist strap. we also use a grounded ESD Mat under the product. we tested the Decay and getting great results but when we introduce the Micro scope, it causes flow disruption and the decay jumps up past the 20< discharge time. do you see an issue? do you think we are still getting the “air blanket” effect? looking for your expertise…
Duncan,
The foundational tenant for ionization use is there needs to be un-obstructed air flow to the part or assembly you are wishing to neutralize charges on. While some some neuralization may be happening in the scenario you presented, it most likely is not as efficient and will take longer for charges to decay.
One option that has worked well for me over the years when challenged with a crowded worksurface was to use over-head ionization at that workstation. You might find that you get better efficiency in neutralizing any charges present.
Thanks!
as for the overhead Ionizers i would run into the same issue with the micro scope disrupting the flow.
What are you trying to neutralise?
If it is the plastic casing of the microscope this is likely to be effective, if it is something beyond the microscope possibly not. If what you are trying to neutralise is a stationary item beyond the microscope, which is left under the ioniser for minutes, you could have a customised time on the test as long as it does take it to the 10% value and you rationalise it in your ESD policy.