Sensornet Sentinel DTS, Quick Start Manual

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Page 3: ...nching the Sensornet Sentinel DTS Software 7 5 THE SENSORNET DTS SENTINEL DATA DISPLAY SCREEN 9 The Temperature Sensing Trace Display Field 9 The Trace Selection Field 10 The Spatial Averaging Adjustment Control 10 The Data Recording Information Field 10 The Program Control Field 10 6 CREATING CONFIGURATION FILES 11 Length Correction 11 Measurement Range 11 Temperature Slope Correction 12 Temperat...

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Page 5: ...re that these warnings are read and understood at all times NOTES Used throughout the user guide to provide additional information hints and tips WARNING THE SENTINEL DTS IS HEAVY ENSURE ADEQUATE CARE IS TAKEN WHEN LIFTING AND MOVING THE SENTINEL DTS THE SENTINEL DTS SHOULD BE MOUNTED ON A SUITABLE SURFACE OR RACK MOUNT CAPABLE OF SUPPORTING THE SENTINEL DTS WEIGHT THE SENTINEL DTS WEIGHS 23KG WAR...

Page 6: ...N Never operate the Sentinel DTS if any damage is observed Contact Sensornet Ltd for advice CAUTION Do not expose the Sentinel DTS to adverse temperatures This may seriously interfere with the correct operation of the Sentinel DTS LASER SAFETY The Sentinel DTS is a Class 1M laser product The Sentinel DTS distributed sensing system incorporates a pulsed laser device whose invisible output radiation...

Page 7: ... the following safety warnings cautions and notices should be observed WARNING DO NOT LOOK AT OR EXAMINE EXPOSED FIBRE OR CONNECTOR ENDS WHENEVER THE DTS IS IN OPERATION WARNING AVOID EYE EXPOSURE TO THE INVISIBLE LASER RADIATION EMITTED FROM FIBRE CONNECTORS OR EXPOSED FIBRE ENDS WARNING DO NOT EXAMINE OR INSPECT EXPOSED FIBRE OR CONNECTOR ENDS USING A VIEWING AID SUCH AS AN EYE LOUPE OR MICROSCO...

Page 8: ...de SEN2 QSG1 0 2 CONNECTING THE SENTINEL DTS MULTIPLEXER The following connections should be made between the Sentinel DTS and if required the Multiplexer and the installation Figure 1 The Sentinel DTS and Multiplexer Connection Diagram ...

Page 9: ...ide SEN2 QSG1 0 Page 5 For more information on making connections using optical fibres please refer to the Sentinel DTS User Guide 3 THE SENTINEL DTS CONTROLS AND INDICATORS THE SENTINEL DTS Figure 2 The Front of the Sentinel DTS ...

Page 10: ...d is emitting LASER ENABLE SWITCH The Laser Enable Switch is a safety device and is used to manually prevent laser operation To enable laser operation turn to the horizontal position To disable laser operation turn the switch to the vertical position CD RW DRIVE The CD RW drive can be used to load and save configuration and measurement data FLASH DISK READER WRITER The Flash Disk Reader Writer can...

Page 11: ...TS system by switching the power isolation switch on the rear panel to the ON position The Sentinel DTS is configured to automatically load and run the DTS measurement software However if the software is not running once the operating system has loaded double click on the Sentinel DTS Icon as shown in Figure 3 or alternatively click on Start Programs Sentinel DTS Figure 3 The Sensornet DTS Softwar...

Page 12: ... 4 The Sensornet DTS Sentinel Main Menu To begin measurements immediately using the factory set calibration values click Start Measurement Alternatively the configuration file can be modified using either the Configuration Wizard or the Configuration Editor ...

Page 13: ...lay screen is shown in figure 5 Figure 5 The Sensornet DTS Sentinel Data Display Screen THE TEMPERATURE SENSING TRACE DISPLAY FIELD The Temperature Sensing Trace Display Field shows the distributed temperature trace of the optical fibre being measured in a graphical format The default display type is Distributed Temperature which displays the trace data as temperature vs distance in the selected u...

Page 14: ...ial averaging applied to the distributed temperature trace data Apply spatial averaging to remove unwanted noise but at the expense of degrading spatial resolution THE DATA RECORDING INFORMATION FIELD The Data Recording Information Field displays information regarding the distributed temperature sensing data determined by the configuration file including start and stop times the current repetition...

Page 15: ...r Run Configuration Wizard The following parameters can be set when creating configuration files LENGTH CORRECTION When creating or editing a configuration file length correction can be applied This is used to correct for dispersion within the fibre cable and ensure both the stokes and anti stokes data are range calibrated This is normally performed by referencing to the end of the optical fibre a...

Page 16: ...alues of a reference probe or region of known temperature CHART RECORDER POINTS Chart recorder points are used to monitor specific points of interest along the optical fibre Once chart recorder points are created they can be viewed in real time while measurements are being taken The values are displayed as temperature vs time TRACE AVERAGING Trace averaging allows the user to specify the measureme...

Page 17: ...ution The repetition time is the total time between consecutive temperature sensing measurements and may include some idle time if the repetition time is greater than the measurement time The Sentinel DTS may be set to operate continuously by checking the appropriate tick box or for a limited number of repetitions un checking the tick box and entering the desired number of repetitions For more inf...

Page 18: ... Expanded Directory Route The Sentinel DTS generates two types of distributed data files These are Full Data and Temperature Only data files FULL DATA SET FILES Full Data Set files contain the complete data set generated by the Sentinel DTS system after every repetition of the measurement cycle These contain the distributed temperature data raw signal data and various installation details name tim...

Page 19: ...5 TEMPERATURE ONLY DATA SET FILES The Temperature Only Data Set files contain only the temperature data generated by the Sentinel DTS system after every repetition of the measurement cycle The Temperature Only Data Set files have a dtd file extension ...

Page 20: ... Temperature trace exhibits step changes at fibre joints Dirty connectors Large splice losses Different fibre types joined Clean connectors Re splice fibre joints Unstable calibration temperature trace jumps excessively after each measurement Incorrect slope or offset on temperature trace Calibration options defined inappropriately Fibre loss variations e g bad connector or fibre join Check refere...

Page 21: ...k router or gateway settings with network administrator Reset VNC passwords Multiplexer channel data appears incorrect Multiplexer Expansion Unit error Fibre cables connected to wrong multiplexer channels Expansion unit cable fault Check fibre cable connections and active channels Ensure Expansion unit cable is connected correctly If problem persists contact Sensornet Ltd DAQ timeout error Interlo...

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Page 24: ...Sensornet Ltd 198 Providence Square Jacob Street London SE1 2DZ United Kingdom Tel 44 0 20 7394 3555 Fax 44 0 20 7394 0555 E mail enquires sensornet co uk Website www sensornet co uk ...