Do the temperature/humidity sequences in ISTA procedures include ramp times?
The temperature and humidity conditioning times specified in ISTA Procedures and Projects are dwell times at the specified conditions, and do not include any time which may be required to transition from one condition to another (ramp times). Some ISTA Procedures (i.e. ISTA Procedure 7D) specify the transition times, and those should be followed.
In certain situations longer temperature and humidity conditioning dwell times may be required. There are packaged-product configurations which may equilibrate extremely slowly with their surrounding atmosphere. For example, hot-filled containers in the interior of dense unitized loads may require a week or more to reach room temperature. If necessary, make measurements or calculations and extend the conditioning times accordingly.
How many samples are required for ISTA testing?
Most ISTA® Procedures and Projects require a minimum of one packaged-product to be tested. A single "pass", however, does not provide high confidence that other seemingly identical packaged-products will also pass the same test. This is due to ...
What are the benefits of random vibration testing vs. fixed-displacement testing?
The answer, in a nutshell, is "better simulation of the actual transport environment". Fixed displacement vibration has been around for over 60 years, and was the first type of vibration ever used for packaged-product testing. In reality, it was ...
What is meant by “fixturing” in regards to vibration testing?
As stated in ISTA testing protocols, "Restraining devices shall be used to... (1) Prevent the test specimen from moving off the platform and (2) maintain test orientation of the packaged-product, but (3) not restrict the vertical motion of the test ...
What is ISTA’s role in ISTA 6-Amazon.com testing?
ISTA is a not-for-profit trade association with a mission to empower organizations and their people to minimize product damage throughout distribution and optimize resource usage through effective package design. In efforts to achieve this mission ...
What are the test parameter tolerances/variances in ISTA procedures?
ISTA test procedures generally do not include tolerances on test parameters such as drop height, compression force, vibration time and intensity, etc. In such cases the requirements given in ISTA test procedures and projects are considered minimums; ...