TAS606 200kg Load Cell not going above 20kg

[brow]

Please see here:

Support for Load Cell - 200kg, Disc (TAS606)

I am a part of a biomedical engineering senior design group at Rutgers University. We are having trouble getting accurate readings from our force sensor (Load Cell - 200kg, Disc (TAS606)) when the applied weight is over 15 lbs. When we apply light weight, we get accurate readings. Is there a way to check if the load cell is blown? Do you know any possible ways to fix this?