I have the accumeasure calipers too. The accumeasure calipers measure you in one place, just above the right hipbone. For me that's one of my leanest areas so I'm not sure if just doing one measurement is enough. I'd love to believe I have 19% BF per what accumeasure tells me but really don't think so....
My favorite is a digital caliper called Fat Track Gold. It measure 3 sites, tricep, ab and thigh. It is usually $50 but I found it for $26 at www.heartratemonitorsusa.com
I use the caliper in along with the scale to track fat mass versus lean mass. That way, if my weight goes up, I am fine with it as long as my lean mass increases.
Only problem with this device, you need help measuring the tricep.
I have the fat track digital caliper too. I also have an older spring loaded caliper. I get more consistent measurements with the spring pressured caliper. I'm trying to get better with my fat track but my measurements are all over the place. I end up getting what I think is an accurate measure with my spring caliper and try and duplicate it with the fat track. Hows that for scientific method? lol
Most calipers send you a booklet on how and where to pinch, and most have 3 places I think. The mid point of the thigh, the iliatic (spell) crest which is just above the hip, and the midpoint of the tricep. I've also seen a belly pinch (right near bellybutton) and a back pinch near the shoulder blade.
I do my own tricep measurement by holding my arm out until I can get a pinch on the *batwing* Then I put my arm back in the position is should be measured to see if the pinch changes any. After I fool with this for a while I eventually end up taking a reading in the *batwing* position. I don't want anyone pinching that stuff but me