CalibrationPulmac has available reference fibers in the form of test sheets with known FS and L test numbers. We have developed a Quick Check Program for use with the Z-Span instruments.
Z-Span 1000 or 1200 Quick Check Program
Z-Span 2000 or 2400 Quick Check Program
For more information on ordering a Z-Span Quick Check program contact Joff@pulmac.us