Glossary
SensorTran is driving an effort to standardize the vocabulary associated with DTS specifications and performance parameters. The following terms are used as defined by SensorTran to describe the operation and performance of their systems. Please note that not all DTS suppliers currently use these terms as described. Customers are advised to pay close attention to these definitions as they compare performance data from various manufacturers. For clarification regarding any of these terms please e-mail SensorTran at techinfo@sensortran.com.
Measurement Time – The period of time required for the DTS to make a measurement of a specified temperature resolution with specified spatial and sampling resolutions over a specified distance on a given fiber probe.
Temperature Resolution – Described as the functional fit for running 20 point standard deviations of temperature data as measured with the entire fiber probe at a temperature of 20C.
Spatial Resolution – The distance required to measure a step change in fiber temperature. The transition is defined as taking place when the temperature has gone from 10% of the change to 90% of the change.
Sampling Resolution – The distance between consecutive temperature data points.
Temperature Accuracy – The maximum difference between any running 100 point temperature average and the actual temperature over the entire length of the fiber probe when the fiber probe is held at a constant 20C. Temperature accuracy can only be measured after the DTS has been properly calibrated.
Optical Budget (loss) – The loss (in dB) that the DTS can tolerate in the fiber probe. This is the summation of losses due to splices, connectors, switches, and fiber in both directions (2 way loss).
Operating Temperature – This is the range of environmental conditions over which the DTS can be calibrated to meet its reported performance specifications.
Temperature Range – This is the range of fiber probe temperatures over which the DTS can be configured to make measurements. [Note: various fiber probe types will have dramatically different lifetimes as a function of probe conditions (specifically probe temperature and pressure).]
Average Power Consumption – The average power required to make a temperature measurement with a resolution of 0.2 degrees C every 10 minutes with 1 meter spatial resolution at a distance of 4km (with the probe at 20C).
Maximum Power Consumption – The maximum power that can be drawn by the DTS.
Measurement Range (distance) – The maximum distance over which the DTS can collect data at a stated sampling resolution.
Short-term Stability (24 hours) – Standard deviations of 288 consecutive 5 minute temperature measurements are calculated for each point along a fiber probe equal in length to the system’s stated range. The maximum standard deviation is reported as the system’s short-term stability.
SensorTran is driving an effort to standardize the vocabulary associated with DTS specifications and performance parameters. The following terms are used as defined by SensorTran to describe the operation and performance of their systems. Please note that not all DTS suppliers currently use these terms as described. Customers are advised to pay close attention to these definitions as they compare performance data from various manufacturers. For clarification regarding any of these terms please e-mail SensorTran at techinfo@sensortran.com.
Measurement Time – The period of time required for the DTS to make a measurement of a specified temperature resolution with specified spatial and sampling resolutions over a specified distance on a given fiber probe.
Temperature Resolution – Described as the functional fit for running 20 point standard deviations of temperature data as measured with the entire fiber probe at a temperature of 20C.
Spatial Resolution – The distance required to measure a step change in fiber temperature. The transition is defined as taking place when the temperature has gone from 10% of the change to 90% of the change.
Sampling Resolution – The distance between consecutive temperature data points.
Temperature Accuracy – The maximum difference between any running 100 point temperature average and the actual temperature over the entire length of the fiber probe when the fiber probe is held at a constant 20C. Temperature accuracy can only be measured after the DTS has been properly calibrated.
Optical Budget (loss) – The loss (in dB) that the DTS can tolerate in the fiber probe. This is the summation of losses due to splices, connectors, switches, and fiber in both directions (2 way loss).
Operating Temperature – This is the range of environmental conditions over which the DTS can be calibrated to meet its reported performance specifications.
Temperature Range – This is the range of fiber probe temperatures over which the DTS can be configured to make measurements. [Note: various fiber probe types will have dramatically different lifetimes as a function of probe conditions (specifically probe temperature and pressure).]
Average Power Consumption – The average power required to make a temperature measurement with a resolution of 0.2 degrees C every 10 minutes with 1 meter spatial resolution at a distance of 4km (with the probe at 20C).
Maximum Power Consumption – The maximum power that can be drawn by the DTS.
Measurement Range (distance) – The maximum distance over which the DTS can collect data at a stated sampling resolution.
Short-term Stability (24 hours) – Standard deviations of 288 consecutive 5 minute temperature measurements are calculated for each point along a fiber probe equal in length to the system’s stated range. The maximum standard deviation is reported as the system’s short-term stability.
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