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 ...
Does the time my package was vibrated in the lab equate to distance traveled in shipment?
The answer to the question of whether a specific vibration test time requires to actual distance traveled in shipping is YES and NO, depending on the test and the shipping means. YES, under certain specific conditions. NO for many common ...
Which ISTA test should I use?
This common question cannot be answered directly, but must be determined in each case through an understanding of the various ISTA tests and their applications. Please click the following link for more information including a "Test Selection ...
What test should I select for ocean shipments?
ISTA Procedures, and other industry-standard packaging test protocols, don’t contain vibration (PSD) profiles for ocean shipment. Several studies have shown that vertical vibration during sea transport is so small that it’s negligible. This is not ...
Is there a formula to calculate the g level at a certain frequency and displacement during vibration testing?
The formula that relates g, frequency, and displacement for sinusoidal vibration is: g = 0.0511 x f2 x D Where g is zero-to-peak acceleration f is the frequency and D is the double amplitude displacement in inches. For example, 0.5g at 2Hz requires a ...