Lays down detailed specifications for the instrumentation and procedure to be used for primary high impact shock calibration of accelerometers. Applies to rectilinear accelerometers, mainly of the piezoelectric and piezoresistive type, to primary standards and working accelerometers. Is applicable for a time range from 10 s to 100 s and a dynamic range from 10^3 m/s^2 to 10^5 m/s^2. The limits of uncertainty applicable are 10 % of reading.