ASTM F3004-13 (2020) pdf free

04-11-2021 comment

ASTM F3004-13 (2020) pdf free.Standard Test Method for Evaluation of Seal Quality and Integrity Using AirborneUltrasound.
Each specific instrument will be operated in accordance with the instrument manufacturers’instructions. Eachwill follow the same general steps as outlined below.
The sample is held in a fixture with the position of itsseal or area of interest noted.
The sample is moved at a constant speed between thegenerating and receiving transducers by either moving thesample relative to the fixed transducers or by moving thetransducers relative to the fixed sample.
The x-Y position is recorded along with the corre-sponding acoustic attenuation or signal strength.
The rate that the sample is tested shall be based onpulse rate and spot size so as to allow a defect, if present, to bedetected.
The signal strength shall be sufficient to adequatelydetect defects. The sensitivity of the instrument to detect agiven defect is determined by testing known defects andcomparing this to known, nondefective samples.
Typically,non-defective and defective samples aretested and their respective responses noted.The informationgenerated,typically the degree of input signal attenuation, canbe entered into the computer data analysis system to providethe criteria for presentation such as numeric,graphical orimagery. False color imagery has been found to be useful withvarious colors assigned to different levels of acoustic attenuation.
The precision of this test method is based on aninterlaboratory study conducted in 2012 (see RR:F02-1033).Four laboratories participated in the study, testing three differ-ent types of packaging, modified with six different intentionaldefects (also one non-defective).SealScan 525 systems fittedwith three ultrasonic transducers, using the L-Scan technique,were used by each participant.
This method allows for the evaluation of seal quality bypassing an ultrasound signal through the sealed area of apackage or item. Poorly sealed areas will not transmit as muchultrasonic energy as properly sealed areas.
This method relies on quantitative analysis of ultrasoundsignal strength, providing a nonsubjective approach to assess-ing package seal quality and detecting defects.This technique has been used for inspecting a variety ofmaterials including flexible pouch seals,rigid tray seals andother packaging components such as affixed valves. Theprecision and bias for any specific package and seal configu-ration needs to be individually determined and validated.ASTM F3004 pdf download.

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