Extensive air showers (EAS) formed as a result of the development of the nuclear-cascade process in the atmosphere are the only source of information about the flux and interaction of cosmic rays with energies above 10^15 eV. For studying of EAS in the energy range from 10^15 to 10^17 eV, the NEVOD-EAS air-shower array is being created at the Scientific and Educational Center NEVOD (MEPhI, Moscow). At present, the array includes 9 independent clusters of scintillation detection stations (DS) deployed over the area of about 10^4 m^2. During the long-term experimental series, the response parameters of each array cluster are regularly monitored in order to provide correct reconstruction of registered EAS and to control the experimental data quality. The cluster response parameters include: the most probable DS response to the passage of single muons, the cross-link coefficients of the DS spectrometric channels, the relative delays of the DS response, baselines of measuring channels, cluster count rates, etc.
The main parameters of the response of the NEVOD-EAS clusters which determine the quality of the experimental data and are accounted in the reconstruction of characteristics of the registered extensive air showers, as well as the algorithms and methods for their determination are described.