check tester status systems test diagnostic function in which the hmi 20 checks connectivity and prompts the impact tester 10 to run system diagnosis to ensure proper function battery level and all other pre requisites for conduction drop test a calibration drop test a test can be performed on a test mat with a known hic value at a specified height or other known data the test measures whether the impact tester 10 is operating within acceptable tolerances for example within 5 if the impact tester 10 is within limits continue and if the impact tester 10 is out of limits test again if the impact tester 10 fails on the second calibration drop test the device must be returned to manufacturer for repair and analysis i select location manual entry of main location address school name park name etc this is the primary location designation and could be a street address name of a park or school or any other primary designation for the location of the testing ii select type of environment field park school manual entry or drop down menu this function allows the user to designate a specific environment within the primary location designation iii select sub location which sports field which playground at the site if applicable this function allows the user to designate a sub location within the primary location sub designations should be used where multiple sites within a primary location are present.