Test Procedure 3E covers testing of unitized loads, made up of either single or multiple products or packages of the same Product Damage Tolerance and Degradation Allowance Samples products. The shipper shall determine the following prior to testing: • what constitutes damage to the product and
• what damage tolerance level is allowable, if any, and
• the correct methodology to determine product condition at the conclusion of the test and • the acceptable package condition at the conclusion of the test.
For additional information on this determination process refer to Guidelines for Selecting and Using ISTA Procedures and Projects.
Samples should be the untested actual package and product, but if one or both are not available, the substitutes shall be as identical as possible to actual items.
Number of samples required:
One sample (unitized load) is required for the tests in this procedure.
Replicate Testing Recommended:
To permit an adequate determination of representative performance of the packaged-product, ISTA: • Requires the procedure to be performed one time, but
• Recommends performing the procedure five or more times using new samples with each test.
• Refer to Guidelines for Selecting and Using ISTA Procedures and Projects for additional information on statistical
sampling.
NOTE:
Packages that have already been subjected to the rigors of transportation cannot be assumed to represent standard
conditions. In order to insure testing in perfect condition, products and packages shipped to certified laboratories for testing must be:
• over-packaged for shipment to the laboratory or • repackaged in new packaging at the laboratory.
• It is important to thoroughly document the configuration, materials, and construction of the tested product and package.
Significant variations in performance can sometimes be caused by seemingly insignificant differences. Photo documentation is strongly recommended to supplement detailed written descriptions.
ISTA 3E 2006 - Page 2 of 15
© 2007 International Safe Transit Association. All rights Reserved.
3ETest Sequence
The tests shall be performed on each test sample in the sequence indicated in the following table:
Sequence # Test Category Test Type Test Level For ISTA Certification
1 Atmospheric Temperature and Humidity
Ambient
Required Preconditioning 2 Atmospheric Controlled Temperature and
Temperature and humidity Optional Conditioning Humidity
chosen from chart 3 Shock Incline Impact (Conbur) 42 in per second Required
(Alternative methods
(1.1 m per second) allowed – select one
Horizontal Impact
test type)
42 in per second (1.1 m per second)
4
Shock Rotational Edge Drop 8 in (200 mm)
Required 5 Compression Machine Apply and Release Calculated Test Force x 1.4 Required
(Alternative methods
allowed – select one
Machine Apply and Hold
Calculated Test Force test type)
Weight and Load Spreader
Calculated Test Load
6 Vibration Random Overall Grms level of 0.52 Required 7 Shock Rotational Edge Drop 8 in (200 mm)
Required
ISTA 3E 2006 - Page 3 of 15
© 2007 International Safe Transit Association. All rights Reserved.
3EEquipment Required Atmospheric Equipment Required Shock Equipment Required Compression Equipment Required Vibration Atmospheric Conditioning: •
Humidity recording apparatus complying with of the apparatus section of ASTM D 4332-01.
• Temperature recording apparatus complying with the apparatus section of ASTM D 4332-01.
Optional Atmospheric Conditioning
• Chamber and Control apparatus complying with the apparatus section of ASTM D 4332-01. The following alternatives are acceptable for the equipment required for the Impact Test: Type of Shock Test Equipment In compliance with the apparatus section of: Incline Test Incline impact tester (conbur) ASTM D 880-92(02) Horizontal Test Horizontal impact test system ASTM D 4003-98 The following alternatives are acceptable for the equipment required for the Compression Test: Type of Compression Test Equipment In compliance with the apparatus section of: Apply and Release Test Compression test system ASTM D 642-00 Apply and Hold Test Compression test system ASTM D 642-00 Apply and Hold Test Weight and load spreader NA Random Vibration Test: • Random Vibration Test System complying with the apparatus section of ASTM D 4728-01.
ISTA 3E 2006 - Page 4 of 15
© 2007 International Safe Transit Association. All rights Reserved.
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