I weighted eight dimes on the scale;
4 at 35.0
1 at 35.2
2 at 35.3
1 at 35.4
Looks like one of the 4 35.0 dimes would work as a reference but I ended up buying some check weights (grams) on ebay for $18.00 shipped.
http://cgi.ebay.com/PRECISION-SCALE-...item3c9b04b486