Falling dart impact tester for films ASTM D 1709

Product Description

Before starting the test, choose test method, and estimate an initial mass and Δm. Start the test. If the first specimen fails, decrease the mass of the falling dart by Δm. If the first specimen is not a failure, increase the mass of the falling dart by Δm. Continue the test according to this rule. In brief, increase or decrease by Δm according to whether the former specimen is a failure or not. After *0 specimens, calculate the total number of failed specimens N. If N equals to *0, the test is over. If N is less than *0, add specimens and continue to test until N equals to *0. If N is greater than *0, add specimen and continue the test until the number of non-failure specimens reaches *0. Then the tester calculates the test results automatically according to specific formulas. According to ISO ***5, ASTM D***9, touch displat, thermal printer report out, USB data out to excel, pneumatic sample grip