EZ Zahn Viscosity Cups Gardco
The EZ Flow Cup formula for each cup of the series matches the applicable ASTM formula in D4212 at the recommended calibration level
EZ Viscosity Dip Cups are compatible to ASTM D1084 Viscosity of Adhesives and ASTM D816
EZ Viscosity Cup calibration is traceable to the National Institute of Standards and Technology (NIST)
Calibration and Certification procedures qualify under ISO/IEC 17025 as applicable
3% guaranteed tolerance for EZ Viscosity Cups complies with & exceeds ASTM D4212
Conversion table relating efflux time in seconds, to the nearest tenth of a second, to viscosity in centistokes furnished with each EZ™ Dip Cup.

EZ Dip Cup orifices are machined rather than drilled to insure exact centering in the cup hemisphere base and a minimum of burr formation. This insures an orifice of specified length and a correct symmetrical efflux stream.
The EZ Viscosity Cup support rods are offset from the side of the cup and secured to the cup sidewall below the cup rim. This eliminates errors due to test material drainage from support surfaces.
The increased separation width of the support rods by over 20% and the lowering of weld to the cup provide best possible conditions for cleaning.
Viscosity Cups are non-returnable items. Subject to final sale.
The EZ Viscosity Cup Series is a logical and necessary outgrowth of the standardization studies on the Zahn Signature Viscosity Cup and similar cups for the promotion of this most popular type of viscosity measuring instrument as a national and international standard. Not only has this cup been improved with respect to earlier produced cups and designed to comply to the requirements of ASTM D4212 but, in addition, each EZ Zahn Viscosity Cups Gardco is furnished with a table which permits conversion between efflux time in seconds to the nearest tenth of a second to viscosity in centistokes. This table is particularly useful in determining efflux time in seconds when viscosity in centistokes is known.

For those users who require documented certification of their measuring equipment, the EZ™ dip cups may be ordered, at an additional charge, with a CERTIFICATE of CALIBRATION . This document contains not only information on actual cup calibration with standard oils traceable to the National Institute of Standards and Technology but in addition, this certification also complies to conditions and procedures under the requirements of ANSI/NCSL Z540 or ISO/IEC 17025 as applicable.

The EZ Zahn Viscosity Cups Gardco are produced to very close mechanical tolerance in elaborate jigs and fixtures. Such equipment not only insures that each cup is correctly produced but also that all cups are identical. All parts of the flow cup are of stainless steel except for the name plate. The following table provides operating range specifications, dip cup midrange sensitivity and recommended Canon calibration oils (standards). Following this table are graphs and mathematical formulas that relate efflux time in seconds to centistoke viscosity.