CMS Silicon Strip Tracker monitoring

The CMS Silicon Strip Tracker is the largest detector of its kind ever operated, with about 200 m² of silicon surface. The Silicon Strip Tracker it is the sub-detector with the highest number of detector modules within CMS. Given the complexity of the device, a variety of tools was developed and is used to measure the status of the detector in real time and allow for data qualification and corrective actions when needed. In this paper we describe the monitoring techniques that are used to safely operate the detector and assess the state of its calibration.