Feasible Method to Validate Measurement Software FLaP used in Automatic Gauge Block Interferometer to Enforce ISO/IEC 17025:2005

摘要

In the field of industrial engineering and dimensional metrology, gauge blocks occupy highest position in hierarchy for realization of length. National Physical Laboratory, New Delhi, India (NPLI) calibrates reference grade gauge blocks ranging in size from 0.5 mm to 300 mm against stabilized red and green laser radiations using an automatic gauge block interferometer, model: GBI-300. A measurement software FLaP programmed by the manufacturer of GBI-300 is used to evaluate length of gauge blocks. As per stipulation in ISO/IEC 17025, the instrumentation of GBI-300 is to be calibrated. The validation of measurement software FLaP used is also essential. NPLI has developed two measurement software programs as per FLaP algorithm. The results produced by NPLI developed software programs and FLaP are compared for a set of gauge block measurement data. In order to validate the measurement software program FLaP, a mathematical model is proposed to quantify similarity of the results thus produced.