FIELD: metering equipment.
SUBSTANCE: invention is related to metering equipment and is aimed at expansion of application field. This result is provided due to the fact that in process of monitoring over tightness in channels of international cable ductwork of fibre optic line for transmission to optic fibre with specified interval, fibre optic moisture meters are connected serially, characteristic of back scattering in this optic fibre is measured at one of its ends, and its variances in sections that correspond to areas of fibre optic detectors location are used to assess moisture in areas adjacent to detectors. At the same time in sight devices of internal cable ductwork of fibre optic transmission line, from connecting couplings of optical communication cable, optical fibre of optic communication cable is taken out, where fibre optic moisture detectors are connected, which are placed in channels of international cable ductwork of fibre optic transmission line from the side of sight devices, then characteristic of this optic fibre back scattering is measured in optical communication cable from one of its ends, and its variances are used to monitor tightness of channels in international cable ductwork of fibre-optic transmission line.
EFFECT: expanded field of application.
1 dwg
