This sample is to be used with the ANKOM DELTA, DELTAI, A200, A200I, A2000, and A2000I Fiber Analyzers. The purpose of the check sample is both to ensure proper function of the instrument and correct procedural technique.  If your results do not meet the expected range, first check your procedural steps. If the method has been followed properly, contact ANKOM Technology at www.ankom.com/contact/analytical-services or call 1-315-986-8090.