Contact Trek Inc in upstate NY as they make a variety of static  
voltmeters (3M and others rebrand their products).  Perhaps they will  
have advice for you on what can be done.

One suggestion, as I had the opposite problem years ago, doing  
consulting on a manufacturing line using Binks sprayers to spray  
adhesive on lids for 55 gal food barrels.  Automation then placed o- 
rings into the adhesive.

No adhesive then the next step placed the lids on the barrels and the  
o-rings would fall into the food.  Oops!

Problem was the sprayers clogged periodically.  So the company had a  
person watching the sprayers....

My solution was to charge the sprayer tips with 10v then use a Trek  
electrostatic voltmeter to measure the charge deposited on the lids.   
No charge, stop the line and clean the spray tips.

Watching job eliminated.

You have the reverse problem so I would suggest grounding the air jet  
tips  then measure with the Trek voltmeter.

Bob Landman

Sent from my iPhone

On Mar 23, 2010, at 5:50 PM, "Thayer, Wayne - IIW"  
<[log in to unmask]> wrote:

> We have a number of "airbrush" low pressure nozzles around here for  
> spraying solvents on reworked boards and for drying them off.  I  
> know that nozzles can create static, but I have had no problems to  
> date and have had no problem with dust sticking to the boards when I  
> dry them off this way.
>
> I haven't been able to find anything on trying to quantify static  
> from nozzles used in this way.  Does anyone have data?  Moving to  
> ionized blow-off for drying the boards would be painful, as that  
> means yet more equipment in our small cleaning stations.
>
> Wayne Thayer
>
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