学生実験用直流測定器較正作業の省力化

摘要

We developed the automated calibration system for the DC meters, and by this system, the laborsaving was achieved in a maintenance work for equipment in the student laboratory. This automated calibration system is applied to calibration for 40 sets of PC controlled data acquisition systems. These data acquisition systems already had been developed and introduced by us as alternative equipment of outdated DC meters. These development and introduction were parts of the plan to modernize the student experiment subjects. On the other hand, a possibility that the burden of our maintenance work would increase was apprehended by retirement of engineers. In order to solve this problem, when we developed the DC measuring instrument which is a subsystem of the data acquisition system, we added the protection feature from an excessive input and the prevention feature from aged deterioration, and aimed at decreasing the workload for the restoration from the accident under experiment. In addition, reduction of the calibration workload was aimed at by working the automated calibration system reported in this paper. As a result, the time for maintenance of the DC meter function of the data acquisition system needed as of 2012 was turned into about 50% of the time which needed as of 2008 (The outdated DC meters were used till 2008, and those were calibrated manually) This paper reports the outline of the automated calibration system, and the situation where calibration work time is saved.