Re: Static charge and digital scales.

From: Kurt Krempetz <krempetz_at_yahoo.com>
Date: Tue, 16 Jan 2018 16:04:48 +0000 (UTC)

Hi Don,
        I find this a very interesting post.  I couple years ago when I started building gliders with foam flaps I believe I observed this same issue.  If I weighed a foam  flap especially just after sanding it down, the scale just displayed crazy readings.   I found that if you let the part sit on the bench for about 1/2 day the readings seem to be correct or at least display reasonable numbers.    Other solution I used is support the part just above the scale but not on the scale and take a reading, then lower the part onto the scale and take another reading, the difference between those two numbers seems to give the same answer as letting the part sit.  I likely am not trying to get as accurate of weighs as you (I am weighing to the .01g)  , so these solutions might not be applicable to your situation.
Cheers,Kurt


      From: "don_at_slusarczyk.com [Indoor_Construction]" <Indoor_Construction_at_yahoogroups.com>
 To: Indoor_Construction_at_yahoogroups.com
 Sent: Tuesday, January 16, 2018 8:46 AM
 Subject: [Indoor_Construction] Static charge and digital scales.
   
  I am curious as to what others do in regards to eliminating effects of static charge when weighing on a digital scale. Since it is winter for me and humidity is low I am getting some static charge on wings and tails which cause the weights to vary. For the short term I have constructed a balsa "tower" that hold parts about 10" above the scale. That seems to work for smaller wings but a F1D wing needs to be much higher to get the scale out of the field. I only see this on plastic covered parts which makes sense. A motor stick or uncovered frame weighs are ok. I have tried Bounce anti cling dryer sheets but that takes time to discharge. Was hoping for a quick solution to discharge. I see they sell anti static devices for lab use but they are $2000 . Also read ionizers can work. Just curious as to what others have done.

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Received on Tue Jan 16 2018 - 16:04:52 CET