In India, RESA V accelerographs developed at the Department of Earthquake Engineering, University of Roorkee have been installed at more than 100 sites. However, a detailed study of the noise characteristics of RESA V had not been done. This paper presents noise characteristics of RESA V which has been determined by digitizing straight line traces of 10, 20, and 30 second duration. The digitizing is done by three operators who digitized each of the trace three times on a semi automatic type digitizer. The digitized data is converted into uncorrected accelerogram. Velocity spectra and Fourier spectra of uncorrected accelerogram of the noise is determined and an illutrative example is given to show the use of these spectra in choosing cut off frequencies for correction of a recorded earthquake accelcrogram. The uncorrected accelerogram of the noise is corrected using Trifunac’s acheme and statistical estimate of quantum of noise present in corrected acceleration, velocity and displacement data is presented.