This document specifies the measurement characteristics, calibration conditions, calibration items and calibration methods, expression of calibration results and recalibration time intervals of the 98D56003001000 aircraft windshield tester. This document is applicable to the calibration of the 98D56003001000 aircraft windshield tester and has the same functions. For calibration of other models of aircraft windshield testers, please refer to this document.