A D V A N C E D M A T E R I A L S & P R O C E S S E S | N O V E M B E R / D E C E M B E R 2 0 2 2 2 6 cells to test low load specimens such as tows or individual fibers. In addition to preventing collision accidents, a smart test frame simplifies the process of swapping out fixtures by saving the required separation between crosshead and base beam in the software for each test. At the beginning of testing, the frame will automatically adjust to the preset separation. This saves time and increases repeatability, ensuring that the tests start from the same place every time, regardless of who is operating the system. Modern test systems are often paired with pneumatic grips to increase throughput and repeatability. These grips have automatic pressure settings in place to increase operator safety. They are programmed in such a way that grip pressure will be low during the clamping process, and only increased at the start of a test. Any potential tissue damage will be minimized in the event of an operator getting a finger pinched or caught in the grips when working with the load string. primary, secondary, and tertiary electronic sign off to ensure that method revisions and test data are reviewed before a change is implemented or data is publicized. These features are particularly useful when end users need to comply with audit requirements such as Nadcap. Although composite testing is complex and presents unique challenges, a well-designed universal testing system is robust enough to withstand the shock and debris issues common to composite testing while also being comfortable, intuitive, and safe for operators and lab managers. When purchasing a test frame, it is important to consult with a qualified provider to discuss how the equipment will meet the specific needs of a particular lab. ~AM&P For more information: Stephan Botzki, applications engineer, Instron, 825 University Ave., Norwood, MA 02062, 781.575.5000, stephan_botzki@instron. com, www.instron.com. There are other safety features in place to ensure that testing is being properly conducted. These include active safety coaching embedded into the test software that informs operators how to set the limit switches properly and also visually indicates what state the system is in. The test software should include features that allow for lab managers to configure permissions for granting access to trained personnel and limiting access where needed. Managers and lab users should be able to review the revision history of methods, tested samples, and reports. Each revision should contain the details of the affected items with both the previous version and the new values, with the name of the user who initiated the changes and the timestamp at which the changes occurred, available for review. Moreover, the ability to approve the changes can also be required, along with the timestamp of the approval. Electronic signatures serve as digital approvals and replace the need for manual, hard copy signatures. If required, these signatures can be configured for
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