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ASTM D 4212 HOW TO
ASTM D 4212 UPDATE
ASTM D 4212 ISO

Most of the cups out there cannot meet ASTM and ISC Specification’s requirements.Why Are All These Cups Out There Different? There are many different producers of “Zahn-type” cups out there and all of them are different from one another, and everytime you buy another cup of the same make the odds are it could be a little bit different from the ones you have. Your products as well as your reputation are too valuable to use just any old type of “Zahn cup” just because it carries the name “Zahn-type” cup. Watch out, for all those so called “Zahn-Type” Viscosity Cups out there! Set of five charts to convert S90/Zahn Signature efflux time to EZ efflux time. Information on viscosity cup calibration liquids and prices.

ASTM D 4212 HOW TO

How to calibrate your GARDCO viscosity cup. Questions and answers about viscosity cups. Set of 5 conversion charts, efflux time versus Centistokes viscosity.Ĭalibration Oil Temperature/Viscosity charts for all 5 cups. What You Get When Buying a Gardco Viscosity Cup.Ĭomplete description of cup use, accessories, & prices. Take advantage of the 20% trade-in allowance on your old Zahn Type cup for purchase of a new EZ cup.

ASTM D 4212 ISO

Oils used to standardize GARDCO Cups are produced in accordance with ISO 9002.

Both GARDCO EZ & GARDCO S90/Zahn Signature dip cups qualify for Calibration Certification under ANSI/NCSL Z540-1 as applicable.

All GARDCO cups are calibrated with standard liquids traceable to the National Institute of Standards and Technology.

A wall size "Viscosity Cup Equivalent Chart" allows you to convert efflux times in seconds to viscosity in Centistokes for all 45 cups made and calibrated by Gardco.

All GARDCO Cups can be calibrated and furnished with a set of Calibration Charts to convert seconds efflux time to viscosity in Centistokes.

S90/Zahn Signature Dip Cups are calibrated within 5% tolerance.

EZ Cups are calibrated to within 3% tolerance.

GARDCO Cups give reliable, credible, accurate readings.

Sets of graphs with flow curves detailing these differences are available on request. This will allow you to maintain the records you have established with your S90/Zahn Signature Dip Cups, and also enable you to invert to ASTM D 4212 readings if necessary, even though the cup Constants and Formulas for the S90/Zahn Signature Dip Cups differ from ASTM Specification D 4212.

You can convert S90/Zahn Signature Dip Cup readings to ASTM D 4212 readings using the EZ to S90/Zahn Signature Seconds Conversion Charts by GARDCO.

Only use CALIBRATED cups with a GARDCO (Paul N.

ASTM D 4212 UPDATE

Be sure to update your specification sheets and literature to include the type of Zahn cup (EZ or S90/Zahn Signature), the cup # and the efflux time in seconds. GARDCO S90/Zahn Signature Dip Cups are designed to meet the earlier specifications. These two cups are the GARDCO S90/Zahn Signature Dip Cups and GARDCO EZ Zahn (ASTM) Dip Cups. We make two calibrated Zahn type cups that do differ in efflux time in seconds in order to meet both past and present specification requirements.

Unfortunately, such cups were not calibrated which often resulted in variations of efflux time in seconds from cup to cup. Some original specifications were based on the early G.E. Differences of over 50% have been recorded. Today these words can still be found in many technical specification sheets and literature, but today the phrase can be misleading, erroneous and meaningless because many makers have copied this cup and their efflux time in seconds can greatly differ from one make cup to another make cup, from one production run to another, as well as from one cup to another in the same lot. Fifty-eight years ago it meant just what it says.