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The paper discusses an integrated approach to using velocimeters for recording irreversible deformations in the epicentral zones of destructive earthquakes. Part 1 discusses methods for calibrating a seismic station using a reference instrument and a calibration shaker table. Formulas are given for determining the constants and conversion factors of velocimeters. It is described how to validate velocimeter constants with velocity and laser displacement sensors. The results are interpreted and analyzed. Methods are described for determining the impulse responses of velocimeters. [ABSTRACT FROM AUTHOR]