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DTS-12

1. 1 Power up the sensor head 2 Calibrate the analog to digital converter circuitry 3 Read the water temperature 4 Do a wipe if the command calls for a wipe if the water temperature is not too low 5 Acquire 100 samples at 20 samples per second 6 Perform statistical calculations as required After about 10 or 20 seconds this time is dependent on the type of measurement requested the sensor will respond with a service request and the logger will retrieve the measurement by issuing a SDI DO command The wiper may be activated explicitly as a single operation or implicitly as the first part of a measurement command See the section on SDI commands for the individual command descriptions Note A wipe operation will add an additional 5 seconds to the measurement operation 1 5 3 DTS 12 calculations The statistical calculations performed by the DTS 12 on the 100 samples are shown below 100 7 1 mean average sum of all measurements 100 X Xi i 1 1 100 variance 55 mean t 1 Xso X51 median edi 5 _ X25 X50 X51 X76 BE gt 4 minimum minimum ofall 100 readings minj2 X X maximum maximum of all readings maxj2 X X100 Where X is measurement I in the sorted list 1 6 Address configuration The DTS 12 is shipped with default address 0 unless shipped as part of an integrated FTS system Refer to section 2 3 3 Change Address for instructions on setting the sen
2. String Note Cmd Report M command status on sensor at address 3 Resp 3 device SDI address m sensor is in m median default mode 2 5 4 Set low temperature wipe cutoff value String Note Cmd 3X se ct 4 Set low temperature wipe cutoff value on sensor at address 3to4C Resp 3 3 device SDI address 2 5 5 Enable low temperature wipe cutoff String Note Cmd 3X se ce y Enable low temperature wipe cutoff Resp 3 3 device SDI address 2 5 6 Disable low temperature wipe cutoff String Note Cmd 3X se cen Disable low temperature wipe cutoff Resp 3 3 device SDI address 2 5 7 Report low temperature wipe cutoff status String Note Cmd 3X g ce Report low temperature wipe cutoff status 3 device SDI address y low temperature wipe cutoff is enabled Resp FITS page 21 1S Chapter 3 Technical specifications DTS 12 User Manual Chapter 3 Technical specifications Sensor type Interface Operating temperature range Depth rating Wipe time Accuracy Temperature Range Turbidity Resolution Turbidity Accuracy Turbidity at 25 C Measurement time Power supply voltage Standby current Active current Wiping motor current Weight Length Diameter Temperature Encapsulated thermistor Turbidity Optical nephelometer sidescatter SDI 12 v 1 3 0 C to 40 C non freezing 30m 5 s nom 0 2 C 0 1600 NTU 0 01 NTU 0 399 99 NTU 2 of reading 400 1600 NTU
3. 4 of reading Zero Offset 0 2 NTU 10 20 s depending on measurement mode 12 V DC nominal range 9 6 V 16 V 0 35 mA 50 mA 200 mA 604g 30 48 cm 5 08 cm FTS page 23 FIS Appendix A DTS 12 User Manual Appendix A Commands recognized by the DTS 12 historical This section is intended for historical purposes only and is not applicable to new DTS 12 s IMPORTANT The commands below are for DTS 12 version 12 and lower serial number 048911 and lower To determine your version number perform an Identification Command and look at the VX field Identification response aCN FTS DTS12 VX SN See section 2 2 for newer command set The DTS 12 supports an extended SDI 12 command set to enable certain features that are not supported by the standard SDI 12 version 1 1 protocol One of these Extended Commands adds the ability to change the address of the sensor Other Extended Commands are used in factory calibration and testing Unlock Command aU OPEN Example 7U OPEN Response 7 The sensor is powered up in the locked mode and can only be unlocked by sending the Unlock command with an Unlock code The Unlock Code is a character string that the user must enter and it must match the internal Lock code exactly Entry into the Unlock state is indicated by a response from the sensor The unlock command was unsuccessful if no response is received The current unlock code is lt space gt OPEN Lock Comman
4. digit between 0 and 9 aDO aDM commands return all available data from the most recent measurement command C following a command requests a CRC code in the data return Verifies SDI communication Reports median turbidity Reports average mean turbidity Returns a average or m median Temperature xxx any decimal number C Default setting disabled Temperature C 1 Too cold below set temperature value so wipe suppressed 2 No wipe for any other reason other than temperature suppressed 3 Attempted wipe FITS page 17 DTS 12 User Manual 2 3 General SDI commands Chapter 2 SDI Commands General SDI commands are used for housekeeping issues such as device address configuration device identification and confirmation of device communications General SDI 12 version 1 3 commands are as follows 2 3 1 Address Query This command requests the address of the SDI sensor String Cmd 27 Resp 0 Note request the single device on this bus to report its address the device is configured for address 0 only one SDI device should be connected to the bus when using this command problems arise when several devices respond on the same bus 2 3 2 Acknowledge Active This command queries whether a sensor is present on the SDI bus at the specified address String Cmd 0 Resp 0 Note request the device at address 0 to confirm it is active a device is present at address 0 2 3
5. output is modulated and synchronously detected so that any effects from ambient light conditions are minimized The measurement range of the DTS 12 is 0 to 1500 NTU making it ideal for stream and river applications The DTS 12 has a built in wiper that is useful for reducing the effects of silt build up and biological fouling of the sensor optics The DTS 12 is factory programmed with turbidity calibration coefficients The micro controller applies these coefficients to the raw measurement data and computes mean median maximum minimum variance and BES Best Easy Systematic estimator All turbidity data is returned in NTUs Nephelometric Turbidity Units All control and measurement functions of the DTS 12 are initiated by sending it a SDI 12 command SDI 12 stands for Serial Data Interface at 1200 baud It is a standardized protocol that defines how microprocessor based sensors can communicate with data loggers Figure 1 1 DTS 12 Turbidity Sensor FIS page6 DTS 12 User Manual Chapter 1 Operation 1 2 Unpacking You should have received the following materials with each DTS 12 sensor 1 DTS 12 Turbidity Sensor complete with 25 or user specification of polyurethane cable 2 Spare wiper blade 3 DTS 12 SDI Turbidity Sensor Operating Manual 1 3 Installation In most cases the best deployment for a turbidity sensor is inside protective tubing typically PVC pipe that is placed in the river and fastened securely to the shore by
6. sssscssssscssssscssssscsssecesssecesnsecssusecessecesssecsssscessuseccsuseccsasecseasecenseeess 25 FTS rT Chapter 1 Operation Chapter contents 11 General description de esiscesscississsedaccsasscssticsbdsisstcivacstssticcsstatdacsscotsccsndetdentiectisccobabecendessheasinsdiasniosvissvebstivanveeleaniiadenmeatbaand 6 eE e e T E E A E O T E E E 1 3 Installation 1 4 SDI Connection 1 4 1 SDI 12 connectorized cable 1 4 1 1 Cable connection 1 4 1 2 Cable disconnection 1S OPCratiOnl eienn na a E NECO EITE E 11 1 5 1 Startup Operation of Turbidity Sensor 1 5 2 Turbidity measurement 1 5 3 DTS 12 calculations 1 6 Address configuration 1 7 Calibration and maintenance UB Replacement Parts avsc cscsisscvccctsscecessssresisansuedescyascddsdacaecasassuascensasatessasuascannauacecassaesdesasundsctaaedecataaarssuasbiteauasinatiaaiaseaantiedien FTS DTS 12 User Manual Chapter 1 Operation 1 1 General description The FTS DTS 12 Turbidity Sensor DTS 12 measures turbidity and suspended solids concentrations in liquids The method used is called optical back scatter and employs a detector at 90 degrees to the incident light beam In practice what this means is that light is emitted into a liquid medium and any amount of reflection detected from suspended matter is a measure of the turbidity of the medium To achieve this result the latest in micro power solid state and infrared laser technology is used The laser light
7. 3 Change Address This command changes a sensor s SDI address String Cmd 0A3 Resp 3 Note change the address of the device at SDI address 0 to 3 response confirms change 2 3 4 Send Identification This command requests detailed identification information from the addressed sensor String Cmd 3I Resp 313FTS Note device SDI address compatible with SDI 12 version 1 3 manufacturer s identifier sensor model version 1 of sensor firmware sensor serial number 2 4 SDI measurement and data commands SDI data commands request data from the sensor FITS page 18 DTS 12 User Manual Chapter 2 SDI Commands 2 4 1 Start Measurement This command is used trigger a measurement on the addressed sensor The sensor will not return data instead the sensor will return the duration of the measurement as well as the number of data points returned by the measurement The data is read using a subsequent Request Data command Refer to Tables 2 and 3 for the specifics of the data returned from the sensor String Note Cmd 3M or 3MC start a measurement on sensor at address 3 without or with CRC in data response respectively device SDI address measurement delay until data is ready seconds number of data points returned 2 4 2 Start Concurrent Measurement The concurrent measurement command allows a sensor to take a measurement while other SDI sensors are also taking measurements The Start Co
8. AS issnin iina a ioidecsskesiesstassiesetes 2 4 2 5 2 3 1 Address Query 2 3 2 Acknowledge Active 2 3 3 Change Address 2 3 4 Send Identification SDI measurement and data comMmmandS ssssssssssssssssssesessssssessesessssessesesesssssssesesssssss 2 4 1 Start Measurement 2 4 2 Start Concurrent Measurement 2 4 3 Request Data 2 4 4 Continuous Measurement 2 4 5 Start Verification Extended command Set ssccsicciscscicsstesicsasccksscssiesdssatessiseselessseaseroserss2sticasdoesuecsebsadceavesweccesses 2 5 1 Enable Median in M command 2 5 2 Enable Mean average in M command 2 5 3 Report M command status 2 5 4 Set low temperature wipe cutoff value 2 5 5 Enable low temperature wipe cutoff 2 5 6 Disable low temperature wipe cutoff 2 5 7 Report low temperature wipe cutoff status DTS 12 User Manual Chapter 2 SDI Commands 2 1 Notation for SDI commands In the end SDI commands are strings of characters sent to the SDI device The format of those strings is important of course and to specify the format of SDI commands we use different typefaces All commands and the replies from the device are represented in a monospaced font Different parts of a command are represented with variants on this text format Item Explanation Text representation Command literal Part of acommand that must be X reproduced literally as it appears Command Part of acommand that must be filled in data parameter with an appropriate value Address p
9. FIS DTS 12 SDI Turbidity Sensor User Manual 1 800 548 4264 www ftshydrology com 700 DTS 12 Rev 20 08 Jan 2014 1S Contact information FTS 1065 Henry Eng Place Victoria B C V9B 6B2 CANADA www ftshydrology com Toll free 1 800 548 4264 Local 250 478 5561 Technical support support ftshydrology com 1S Revision History Date Person Description 27 Jan 2012 RG Update for DTS 12A and format to current standard 10 Dec 2012 PB Correction made to BES equation on pg 12 16 May 2013 CV Clarification improvements and added appendices 13 June 2013 CV Updated cable connect disconnect instructions and deployment guide 12 July 2013 CV Updated deployment guide drawings 08 Jan 2013 CV Corrected typo in DTS request data response rT Table of contents Contact information 5 500sccsesasssscesoserssesessveseosononsessceessevecvossasensesoosossssoussssseonsnsosssesesdesseaesoeoseseedossesesvousedeova eoseses ii Chapter 1 OP SU AUN aii oso ea sso ace ci cles cease osansectdeansncbssenanctseceaesadeceinedsecesecsanseseanoosndecoeasseseceaeaasosvessesesecoaeaes 5 Ti General descriptio ecsssssssecsssssccsssscsssceessssccsssceessseccssscessnseccssscessuecessuscessucessuscssssecssascessuseessuseessuseeseascestaceessscecsiaceesnaes 6 e MTA ACK UAC chats ch cescassveseessscccbctasvecocssss crests tvescoatssecdedasvecectivacesasssvesgeas cerdoty Gverscsiascrssaa veveedt erduty sverestiwa GeastuwverestissfebotaW
10. Status FITS page 16 DTS 12 User Manual Chapter 2 SDI Commands Command name Start Measurement i Mean average Mode i Temperature Mean Turbidity i Variance of the Mean Command code aM aMC aMo aMoc aC acC Notes No wipe before measurement Mean average mode returns 3 data points Start Measurement Mean Variance Median BES Min Max Temperature Start Measurement Mean Variance Median BES Min Max Temperature wipe status Start Measurement Single turbidity measurement Reserved for factory use Not used Not used Not used Wipe sensor window wipe status Reserved for factory use Request Data Continuous Measurements Read Start Verification no data returned Enable Median M command Enable Mean average M command Report M command status Set low temperature wipe cutoff value Enable low temperature wipe cutoff Disable low temperature wipe cutoff Report low temperature wipe cutoff status Wipe Code 0 Wiped aM1 aMC1 aC1 aCC1 aM2 aMC2 aC2 aCC2 aM3 aMC3 aC3 aCc3 aM4 aMC4 aC4 aCC4 aM5 aMC5 aC5 aCcs aM6 aMC aC aCc aM7 aMC7 aC7 aCC7 aMs aMCs aCs aCcs aM9 aMC9 acg aCcg aDn aR aRC av aX se mc m aX se mca aX g mc aX se ct xxx aX se ce y aX se cen aX g ce Wipe before measurement No wipe Data return is wipe status n is a
11. an and Mean avg mode If less than Temperature Mean Turbidity Version 11 then mode will be set to Mean Variance of the Mean No wipe before measurement Start Measurement Mean Variance aM1 No wipe Median BES Min Max Temperature Start Measurement Mean Variance aM2 Wipe before measurement Median BES Min Max Temperature Wipe status median mode Start Measurement Single turbidity aM3 No wipe measurement Start Measurement single turbidity aM4 No wipe measurement voltage counts range Not used aM5 Not used aM6 Not used aM7 Wipe sensor window aM8 Reserved for factory use aM9 Request data aDn n is a digit between 0 and 9 aDO aDM commands return all available data from the most recent measurement command Start Verification av Verifies SDI communication Subsequent DO Request retrieves results Expected results aDO a 1 0 0 xx xx numbers for internal diagnostics Enable Median M command ac 3 Unlock is required prior to command Reports median turbidity Version 11 or higher Enable Mean average M command aC84 Unlock is required prior to command Reports average mean turbidity Version 11 or higher FITS page 26 DTS 12 User Manual Appendix A Command name Set low temperature wipe cutoff value Enable low temperature wipe cutoff Disable low temperature wipe cutoff Wipe Code 0 Wiped Command code acson acs aC82 Notes Unlock is required prior to co
12. art of First character of command except a command Address Query Valid values 0 9 a z A Z 2 2 Commands recognized by the DTS 12 The table below provides a quick reference to the commands recognized by the DTS 12 For details on these commands see the following sections IMPORTANT The commands below are for DTS 12 version 20 and up To determine your version number perform an Identification Command and look at the VX field Identification response aCN FTS DTS12 VX SN See Appendix A for older command sets Command name Command code Notes Address Query 2 Acknowledge Active a Change Address aAb b is the new address a single alphanumeric character in the range 0 9 a z A Z Send Identification al Resp aCN FTS DTS12 VX SN a address CN SDI 12 compatibility number FTS manufacturer identifier DTS12 sensor type VX firmware version number SN serial number Start Measurement general aM aMC C following a command requests a CRC code in aMn aMCn the data return D command nis a digit between 1 and 9 Start Concurrent Measurement aC aCC C following a command requests a CRC code in general aCn aCCn the data return D command nis a digit between 1 and 9 Start Measurement aM aMC Causes a wipe before the measurement i Median Mode factory default aM0 aMOC Median mode returns 4 data points Temperature Median Turbidity aC acc Variance of the Mean Wipe
13. d aL Example 7L Response 7 The sensor is re locked by executing the Lock command A response from the sensor indicates success No response indicates the command failed The table below provides a quick reference to the commands recognized by the DTS 12 For details on these commands see the following sections Command name Command code Notes Address Query 2 Acknowledge Active a Change Address aAb b is the new address a single alphanumeric character in the range 0 9 a z A Z Unlock command is required prior to address change on all versions 11 and lower Send Identification al Resp aCN FTS DTS12 VX SN a address CN SDI 12 compatibility number FTS manufacturer identifier DTS12 sensor type VX firmware version number SN serial number Start Measurement general aM nis a digit between 1 and 9 aMn FITS page 25 DTS 12 User Manual Appendix A Command name Command code Notes Start Measurement aM Only Version 11 and up can toggle between Median Mode factory default aMo Median and Mean avg mode If less than Temperature Median Turbidity Version 11 then mode will be set to Mean Variance of the Mean Wipe Status Causes a wipe before the measurement if and only if the sensor has V11 firmware or later Median mode returns 4 data points Mean average mode returns 3 data points i Start Measurement aM Only Version 11 and up can toggle between Mean average Mode aMo Medi
14. e wiper arm thumbscrew with your fingers To reduce unnecessary stress on the wiper drive system hold the wiper arm while turning the thumbscrew counter clockwise On older models remove the split pin from the wiper arm by tapping it out with a punch of the same diameter The current design incorporates a slot with a circular opening at one end that allows the wiper material to be maneuvered out of or into the slot In both cases slide the old blade off the wiper arm Reassemble using a fresh wiper blade following the previous steps in reverse order Wiper Blade _ Wiper Armature M3 X 8 Thumbscrew Figure 1 8 DTS 12 Wiper Arm Detail FTS page 13 DTS 12 User Manual Chapter 1 Operation 1 8 Replacement Parts If replacement parts are required the entire wiper assembly shown in Figure 1 8 p 13 can be ordered from FTS by specifying part number DTS12 WIPER If individual components are required specify part number according to the table below FTS Part Number Description DTS12 WIPER Wiper and Armature assembly 993 WIPER ARM Wiper Armature 698 DTS12 WIPER Wiper Blade 610 M3X8 TMB M3 x 8 Thumbscrew FTS page 14 1S Chapter 2 SDI Commands Chapter contents 2 1 Notation for SDI COMMANAS cescsssssssssssesssssesssssssssssssssessssssssesssssssssssesssssesssssssessessses 2 2 Commands recognized by the DTS 12 sssssssssccssssecsseccssteccestecsssceecsseccsssceesnseecssaes 2 3 General SDICOMIMAN
15. free end of the cable is shipped with a length of the polyurethane jacket removed to expose the three 20 AWG conductors This allows maximum flexibility when connecting to a data logger that uses a terminal strip The SDI cable may be optionally terminated with a 3 pin military connector for connection to similar connector on the data logger Cable wire colour coding and FTS standard connector pinouts are shown in the table and diagram below Wire colour Pin Function Red A 12 V DC power supply White B Data Black C Ground Waterproof military style bayonet connector 851 06JC8 3AP50 FTS part number 520 83AP compatible with FTS Axiom dataloggers FTS pages DTS 12 User Manual Chapter 1 Operation 1 4 1 SDI 12 connectorized cable The DTS 12 can be ordered with fixed length connectorized cables 60 and 100 ft that allow for quick disconnect and re connection This watertight connection is submersible and permits easy sensor removal from a field installation without removing the cable In complex installations or on installations with long cable runs this is a very desirable attribute A thin film of dielectric grease is placed on the End Cap Flange during connection at the factory This facilitates the operation of the connection and should be reapplied as needed to ensure the connection can be unplugged If doing so ensure that the grease is kept out of contact with the electrical prongs and receptacles to avoid a po
16. int that electrical contact with the male prongs becomes intermittent In addition one of the male prongs on the DTS 12 end cap has a larger diameter than the other two This larger diameter prong must be aligned with the two reference nipples on the cable connector as shown in the connection photos above to ensure that the prongs are inserted into the correct receptacles Forcing insertion into the wrong position will permanently damage the connection Aggressive twisting can also result in bending and breaking prongs Do s and Don ts 1 Do use clean dielectric grease to lubricate the DTS 12 End Cap Do keep prongs and receptacles free from grease Do keep the End Cap Prongs and Cable Connection Receptacles dry Do not disconnect the cable under water Do not leave an unconnected cable connection underwater D a F wo DN Do not bend or twist the cable connection during connection or disconnection 1 5 Operation 1 5 1 Startup Operation of Turbidity Sensor When power is first applied to the DTS 12 a wipe cycle will occur This is a normal part of the sensor initialization When the wiper returns to its normal parked position the DTS 12 is ready to accept SDI commands 1 5 2 Turbidity measurement A measurement is initiated when the logger sends an appropriate SDI command to the DTS 12 When this happens the DTS 12 will execute a measurement cycle consisting of the following steps FITS page 11 DTS 12 User Manual Chapter 1 Operation
17. mmand Temperature n default is 2 C Version 11 or higher Unlock is required prior to command Will not wipe below cutoff Version 11 or higher Unlock is required prior to command Attempts wipe regardless of temp Version 11 or higher 1 Too cold below set temperature value so wipe suppressed 2 No wipe for any other reason other than temperature suppressed 3 Attempted wipe FTS page 27
18. ncurrent Measurement Command operates in the same manner and returns the same information as the Start Measurement command refer to Table 2 String Note Cmd 3C or 3CC start a concurrent measurement on sensor at address 3 without or with CRC in data response respectively 3 device SDI address measurement delay until data is ready seconds 04 number of data points returned Resp 2 4 3 Request Data This command requests the data generated by the preceding Measurement M or C command An aD0 command is always the first command sent to retrieve the data If additional data needs to be read then an aD1 command is sent then and aD2 etc up to aD9 as required to retrieve all data String Note Cmd 3M2 start a measurement on sensor at address 3 Resp 3 device SDI address measurement delay until data is ready seconds 8 number of data points returned Cmd request data from previous measurement command Resp sensor SDI address mean turbidity 0 000 variance median 2 17 BES min 2 26 max Cmd 3D1 request more data from previous measurement command FIS page 19 DTS 12 User Manual Chapter 2 SDI Commands Resp sensor SDI address temperature Cmd OMC start a measurement on sensor at address 0 with CRC in data response Resp 0 device SDI address measurement delay until data is ready seconds 4 number of data points returned Cmd request data from previous measurement comma
19. nd Resp 3 sensor SDI address temperature in degrees Celsius 0 0 mean turbidity 0 244694 variance 0 wipe code median mode Pu CRC code 2 4 4 Continuous Measurement This command is not supported by the sensor The response of the sensor to a Continuous Measurement command is shown below String Note Cmd 1R perform a continuous measurement read on sensor at address 3 Resp 1 1 sensor SDI address DTS 12 is not a continuous measurement device No data is returned Cmd 1RC perform a continuous measurement read on sensor at address 3 with CRC code in data response 1 sensor SDI address CRC code DTS 12 is not a continuous measurement device No data is returned Resp 2 4 5 Start Verification This command is not supported by the sensor The response of the sensor to a Start Verification command is shown below Note Cmd start verification on sensor at address 3 Resp 3 device SDI address measurement delay until data is ready seconds no data is returned FIS page 20 DTS 12 User Manual Chapter 2 SDI Commands 2 5 Extended command set 2 5 1 Enable Median in M command String Note Cmd 3X se mc m Enable Median M command on sensor at address 3 Resp 3 3 device SDI address 2 5 2 Enable Mean average in M command String Note Cmd 3X se mca Enable Mean average M command on sensor at address 3 Resp 3 3 device SDI address 2 5 3 Report M command status
20. or electrical connection Warning Because of the tight fit of this connection inexperienced users tend to twist and bend the connection when connecting or disconnecting the cable This inappropriate handling WILL damage the female receptacles inside the Cable Connection See How to connect and disconnect the DTS 12 turbidity sensor waterproof connectorized cable video on the FTS web page for proper procedure http www ftsenvironmental com video 1 4 1 1 Cable connection Dielectric Grease placed on End Cap Flange Connection Largest prong aligned with cable connector bumps 1 1 Slowly rotate on 1 DO NOTTWIST_ Push Cable Connector onto End Cap DO NOT bend or twist connection Secure the locking sleve Figure 1 6 Cable connection details FIS page 10 DTS 12 User Manual Chapter 1 Operation 1 4 1 2 Cable disconnection After unscrewing the locking collar slide it up the cable out of your way Firmly grip the probe and cable connection as outlined below and rotate and pull the connection apart Ensure you do not bend or twist the cable connection Remove the locking ee Slowly rotate and pull to break sleve and move it the air seal out of the way DO NOT TWIST Figure 1 7 Cable disconnection details Caution The female receptacles inside the cable connection are susceptible to damage if the connection is bent or twisted These actions can splay out the female connections to the po
21. sor s address 1 7 Calibration and maintenance The only field maintenance required by the DTS 12 is a periodic check of the wiper for deterioration or fouling with biological or other material If fouling is detected and the wiper blade is in otherwise good condition it may be cleaned and re used Use a soft lint free cloth or wipe with Methyl or Ethyl alcohol soaps or detergents to clean the wiper optic surface and body of the probe You may also use a soft toothbrush to help remove the material Care must be taken not to scratch the window as this may affect the sensor calibration Do not use harsh or FITS page 12 DTS 12 User Manual Chapter 1 Operation abrasive cleansers or petroleum products If the wiper blade edge appears ragged or uneven then the wiper assembly should be replaced Each DTS 12 is shipped with a spare piece of wiper material 698 DTS12 WIPER packaged in a small zip lock bag attached to the cable These can be changed as shown below Complete replacement wiper arm assemblies may also be purchased from FTS part DTS12 WIPER The complete assembly can be changed by loosening the thumbscrew to remove the old wiper assembly and replacing it with the new wiper assembly If tools and a work area are available then replacing the wiper blade is an option To replace the wiper blade refer to Figure 1 8 and perform the following operations 1 Remove the wiper assembly consisting of the wiper arm and wiper blade by undoing th
22. various means concrete pillars metal stakes etc Figure 1 2 shows such an installation If in doubt consult FTS regarding the best deployment options for your site The DTS 12 must be oriented such that the optical window has at least 4 inches axial end clearance and 2 inches radial side clearance from any physical objects e g the river bottom The sensor should be located in an area that is representative of the water to be measured Figure 1 2 Typical DTS 12 installation FITS page DTS 12 User Manual Chapter 1 Operation To aid in installation FTS can supply a DTS 12 sensor deployment guide This deployment guide can be used in conjunction with the user supplied and constructed 4 inch ID deployment tube The deployment guide can be slid down the inside of the protective tubing typically schedule 40 Aluminum or PVC pipe that is placed in the river Examples are shown in the figures below 1 4 20 1 5 HEX BOLT LOCK WASHER ele 44 FLAT WASHER k ROD a N a EW DEPLOYMENT GUDE Figure 1 3 DTS 12 deployment guide diagram Figure 1 4 ABS Deployment Guide installed on a DTS 12 FTS pages DTS 12 User Manual Chapter 1 Operation Figure 1 5 Typical DTS 12 deployment tube and deployment guide combination 1 4 SDI Connection The SDI cable nominally 25 feet long may be connected to the DTS 12 by waterproof gland or underwater connector Normally the
23. veresuinnseoed 7 1 3 Wstallation spesesssscccstsssccsssssucsessacsesccccusweccscuasccssssoucsssyacsecoscussascssuvigduassavccessaaeesescuasasuasvvagcsasrebsecsyvatoss cdeeedsussuvig dussndovccouvatesssevastses 7 E SSC ORME CU OM cases scctecssce cece acetecsasescestt szuter E NAA 9 VB OP STATION E E E E E E E E A ES 11 16 Address configurati Nsssssssssssnsnnnennisnaiann EEE 12 1 7 Calibration and maintenance eccsssesssssssssssessssessssssssecsssesssssesucssssessssessccssscssscsssssssuscsssecssssessscsssessscsessessnsccsseesees 12 18 Replacement Parts iiiccesisseives ia sawsnvateaiehewicairsviteweate aneictsiaietan diate R EER 14 Chapter 2 SDI COMMAS sicsscsisicecscdssssesstersnvscccscssssteiensdsieteaciessienededeieesseceteveisteteactesstesedsiedensdsietectevsderedss 2 1 Notation for SDI COMMANAS cssseees 2 2 Commands recognized by the DTS 12 2 3 General SDI COMMANAS u ssscsssssssssssesssseesssessssccsnecsssessussesuecsssesssscessecssscsssessssessuscsssesssssesuecsssesssesesuessnscsssecesseesseessseesse 2 4 SDI measurement and data commands 18 25 Extend d command SOt asessasdessssassscssscosskcdssinusevas etude sanseasdancbussSeeteusesoasecudssansedessacosutlantsvasvousetedusesucdesaaousstastsntvabountadieeds 21 Chapter 3 Technical specifications cecesscssscsecssscsesecscecsesececccsesscecscsesececscseseccsecesecececsesececeecesers 22 Appendix A Commands recognized by the DTS 12 historical

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