CABLE TEMPERATURE CONTROLLER

摘要

PURPOSE:To achieve a temperature adjustment without breakage regardless of a rise in the sheath voltage by employing a temperature adjustor with a battery as power source. CONSTITUTION:A temperature adjuste 1 to which a temperature signal for a sheath 2 is inputted through a thermocouple 3 with one joint thereof contacting the sheath 2 of a cable C is lifted properly with an insulated frame 4 from the ground G and employs a battery as power source. An on/off signal for an energization heat current generated from the temperature adjuster 1 according to the temperature signal is applied to a light emitting diode 5 and then, introduced to a relay circuit for controlling the energization heat current via an optical fiber 6 and a photoelectric conversion element 7. This enables the control of the heat current without damage to the temperature adjuster due to a rise in a sheath potential.