Patent ID: 7526397

Claim:
A remote temperature calibration apparatus for use in calibration of a distributed fiber optic temperature measurement system comprising: a. a first reference cell coupled to a first temperature control system configured to attain a first reference cell temperature; b. a second reference cell coupled to a second temperature control system and to said first reference cell and configured to attain a second reference cell temperature, the first and second reference cell temperatures being different; c. wherein said first and second reference cells are configured to be inserted into and removed from an enclosure housing the first and second reference cells; d. wherein said first and second reference cells are configured to allow a fiber optic sensing cable, without being cut, to be wrapped around the first and second reference cells while said first and second reference cells are removed from the enclosure; and e. wherein said enclosure housing said first and second reference cells is located remote from said distributed fiber optic temperature measurement system.