Debugging and Mathcad animation

I have created I think most difficult function of IAPWS-IF97 formulation - the function wspV3PT(p, T) - specific volume (of density) of water/steam near the critical point (region 3) - see the description this function and the link on my on line calculation here

http://www.iapws.org/relguide/IF97-Rev.html

Mathcad animation has a lot helped me to find bugs my wspV3PT function!

See one animation above!