AWTA Ltd Conversion Tables - Calculations

AWTA Ltd Wool Testing Handbook

Objective Measurement is an integral part of the preparation, marketing and processing of Australian wool.

Nearly all Australian wool is tested for Yield, Vegetable Matter Base and Mean Fibre Diameter prior to sale and/or prior to export.  An increasing proportion is also tested for Mean Staple Length and Mean Staple Strength.  Scoured and carbonised wool is normally tested for Regain (moisture content).  However, a significant number of scoured and carbonised lots are also tested for Yield and Mean Fibre Diameter.

This handbook is designed to provide members of the wool industry with  details of the technical basis to Objective Measurement and the procedures for many of the common calculations.  The information included is largely drawn from, or based upon, the relevant IWTO Test Methods and Regulations and Australian Standards.

The key features of the booklet are:

• calculation procedures and terminology are outlined for various Test Certificates;
• sections on the precision of testing and retesting are included.  These sections describe procedures available for improving the precision of a test result and the procedures followed by Test Houses when a retest is initiated;
• Core Test interyield conversion tables previously published in a separate booklet are included; and
• a bareme for the calculation of theoretical HAUTEUR from raw test data according to the formula described in the REPORT ON TRIALS EVALUATING ADDITIONAL MEASUREMENTS 1981 - 1988, DECEMBER 1988 (TEAM) has been included.

This handbook, first published in September 1990 will not be reprinted. In due course, an electronic version, updated for the changes that have occurred since the last edition, principally the introduction of the TEAM 3 formulae, will be available here.

Copies of the last issue of the handbook are still available and can be obtained from the nearest AWTA Ltd Office.