Jay,

I've been trying to calculate the size of the check weigher based upon the weight you supplied. I am assuming you are trying to check the weight based upon density, and for density I'd need to know the weight per cubic meter rather that square meters which is a measure of area. The last bit of information to plug into this equation is the speed of the filter media in terms of millimeters per second.

By knowing the density and speed you can calculate the capacity of the system. You can also calculate the length of material needed to get an accurate sample. If you use a strain gauge loadcell to sense the weight of the material based over a fixed length, you can determine the density. Most loadcells are rated at between 1/3,000 and 1/10,000 counts of resolution. So a 10 kg loadcell would at best be able to resolve to the nearest gram. You also have to allow for the dead weight of the platform that supports the filter media, which will cut into the maximum live load that is being supported by the platform. The signals that you would need to sense in Labview would be a strain gauge loadcell cell signal and an encoder that gives you the travel of the filter media.

If you can post more info, perhaps I, and the others in this group can help.

regards,

Todd Dietrich

Service Technican, Kaskaskia Valley Scale Co.

todd@kvsco.com

http://www.kvsco.com ■