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Isometric bipositive representations of normed real ordered spaces with a closed cone on C(X) with X a compact Hausdorff space is a classical subject that has been considered by many authors and there are well known characterizations of such representability in the literature.  We consider the more general case of locally convex real ordered space with a specified family of seminorms, which we call calibrated ordered spaces, and through the Bauer-Nachbin-Namioka Theorem and Schaefer's construction obtain characterizations of isometric bipositive representability of such spaces on C(X), with X a locally compact Hausdorff space. Some characterizations are new even in the normed case. If time remains, we will discuss an application of main results to a characterization of seminorm additivity property of two positive functionals.