NZS 8716:1994
Method for the measurement of the bulk of raw wool
Sets out in detail the method for determining the bulk of raw wool using a bulkometer which places a known pressure onto a sample of wool and gives specific volume. Also provides the basis for calibrating the test results from a testing line by the use of reference wools.
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COMMITTEE REPRESENTATION
© COPYRIGHT
CONTENTS
RELATED DOCUMENTS
FOREWORD
REVIEW OF STANDARDS
1 SCOPE
2 DEFINITIONS
3 PRINCIPLE OF METHOD
3.1 Sampling
3.2 Preparation
3.3 Measurement
3.4 Calculation of the bulk value
4 ESSENTIAL REQUIREMENTS
4.1 Apparatus
4.2 Calibration
4.3 Use of other apparatus and/or procedures
5 SELECTION OF SAMPLE AND SUBSAMPLE
5.1 Core sampling
5.2 Subsampling
5.3 Storage of samples and subsamples
6 PREPARATION OF SUBSAMPLE
6.1 Scouring
6.2 Drying
6.3 Conditioning
6.4 Carding
6.5 Storage after carding
7 MEASUREMENT
7.1 Bulkometer check
7.2 Time limit
7.3 Obtaining test specimen
7.4 Rest time
7.5 Compression cycle
8 CLEANING OF THE MEASUREMENT CYLINDERS
9 CALCULATION OF THE TEST SPECIMEN RAW BULK RESULT
10 ALLOWABLE RANGE OF TEST SPECIMEN RESULTS
11 CALCULATION OF THE MEAN RAW BULK RESULT
12 CALCULATION OF THE BULK VALUE
13 PRESENTATION OF RESULTS
13.1 Single test lot
13.2 Combination of test lots
14 PRECISION
14.3 Expected precision
14.4 Maximum retest range
APPENDIX
A BULKOMETER
B OPENING DEVICE
C REFERENCE LABORATORY
D REFERENCE WOOLS
E CALIBRATING A BULK TESTING LINE
F HANDLING OF SUBSAMPLE AND TEST SPECIMENS
G PROCEDURE FOR THE COMBINATION OF BULK VALUES FROM TWO OR MORE LOTS
Table
1 - Minimum coring rates for different test lot sizes
2 - Allowable test specimen range
3 - 95 % Confidence interval for bulk
4 - Maximum retest range for bulk
B1 - Opening device specifications
B2 - Roller settings
D1 - Reference wool parameters
E1 - Maximum differences for calibration samples
E2 - Regression equation limit
STANDARDS COUNCIL APPROVAL
Figure
1 - Bulkometer cycling procedure
A1 - Schematic drawing of a simple bulkometer
B1 - Diagram of the recommended carding machine
D1 - The cycle for the acquisition and replacement of a reference wool
F1 - The funnel to assist in loading measurement
F2 - The pushrod to be used for loading measurement
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COMMITTEE REPRESENTATION
© COPYRIGHT
CONTENTS
RELATED DOCUMENTS
FOREWORD
REVIEW OF STANDARDS
1 SCOPE
2 DEFINITIONS
3 PRINCIPLE OF METHOD
3.1 Sampling
3.2 Preparation
3.3 Measurement
3.4 Calculation of the bulk value
4 ESSENTIAL REQUIREMENTS
4.1 Apparatus
4.2 Calibration
4.3 Use of other apparatus and/or procedures
5 SELECTION OF SAMPLE AND SUBSAMPLE
5.1 Core sampling
5.2 Subsampling
5.3 Storage of samples and subsamples
6 PREPARATION OF SUBSAMPLE
6.1 Scouring
6.2 Drying
6.3 Conditioning
6.4 Carding
6.5 Storage after carding
7 MEASUREMENT
7.1 Bulkometer check
7.2 Time limit
7.3 Obtaining test specimen
7.4 Rest time
7.5 Compression cycle
8 CLEANING OF THE MEASUREMENT CYLINDERS
9 CALCULATION OF THE TEST SPECIMEN RAW BULK RESULT
10 ALLOWABLE RANGE OF TEST SPECIMEN RESULTS
11 CALCULATION OF THE MEAN RAW BULK RESULT
12 CALCULATION OF THE BULK VALUE
13 PRESENTATION OF RESULTS
13.1 Single test lot
13.2 Combination of test lots
14 PRECISION
14.3 Expected precision
14.4 Maximum retest range
APPENDIX
A BULKOMETER
B OPENING DEVICE
C REFERENCE LABORATORY
D REFERENCE WOOLS
E CALIBRATING A BULK TESTING LINE
F HANDLING OF SUBSAMPLE AND TEST SPECIMENS
G PROCEDURE FOR THE COMBINATION OF BULK VALUES FROM TWO OR MORE LOTS
Table
1 - Minimum coring rates for different test lot sizes
2 - Allowable test specimen range
3 - 95 % Confidence interval for bulk
4 - Maximum retest range for bulk
B1 - Opening device specifications
B2 - Roller settings
D1 - Reference wool parameters
E1 - Maximum differences for calibration samples
E2 - Regression equation limit
STANDARDS COUNCIL APPROVAL
Figure
1 - Bulkometer cycling procedure
A1 - Schematic drawing of a simple bulkometer
B1 - Diagram of the recommended carding machine
D1 - The cycle for the acquisition and replacement of a reference wool
F1 - The funnel to assist in loading measurement
F2 - The pushrod to be used for loading measurement
NZS 8716:1994
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.