Organization of remote calibration for measuring instruments of electrical quantities

Abstract

The importance of the work is conditioned by the need to develop and to improve calibration procedures of measuring instruments. In contrast to conventional calibration, a remote calibration provides economic benefits due to all necessary equipment is in the customer's laboratory; there is no need to transport it to the calibration location. The main aim of the study: to identify the features of building the remote calibration system for measuring instruments of electrical quantities via the Internet. The methods used in the study: cryptographic security. The results: The authors have proposed the method for secure transmission of measurement data during remote calibration. The paper introduces the experimental results for the developed remote calibration system using the local network, as well as using the Internet global network with the deployment of the system instruments in different countries. The experimental investigations of the developed remote calibration system using Blowfish encryption algorithm shown that the total calibration time under local and global deployments differs insignificantly, from 8,6 to 24,4 % in dependence on quantities to be calibrated. This confirms the possibility to use the developed system for remote calibration of electrical measuring instruments.

Keywords

• remote calibration
• measurement data
• measuring instrument
• software
• calibration data protection
• Internet