Series 500 SDI-12 Transducer User`s Manual
Contents
1. 2 0 Product Introduction The Series 500 SDI 12 submersible pressure transducer uses an isolated diaphragm sensor that is specifically designed for use with hostile fluids and gases The sensor uses a silicon pressure cell that has been fitted into a stainless steel or titanium package with an integral compliant stainless steel or titantum barrier diaphragm Different user installable nose caps are available for the Series 500 transducer The closed face end cap PN 42 01 1314 with 8 32UNC 2B threaded hole is best used where weights are required and for those installations where users may encounter sharp protruding objects The open face end cap PN 42 01 6481 that allows maximum contact with the liquid media is ideal for wastewater and greasy applications where clogging of the sensor is a concern A high density piezometer screen may be inserted into specially drilled open face end caps should the user decide to completely cover the Series 500 transducer with soil or silt Option E in the Pressure Connection section of Ordering Information CLOSED FACE The Series 500 is solid state and suitable for data collection and monitoring applications The sensor has been designed with the following features to operate in a wide range of applications Low power consumption Standby power is 0 5 mA High accuracy Above 10 ft H O 0 05 of Full Scale Below 10 ft H O 0 1 of Full Scale Full temperature compensation The ac2. command after the measurement is complete as signaled by extra Service Request response in order to retrieve the data Measure calibration lab slope and offset Use this if you want to view the calibration 12 www PressureSystems com Pressure Systems Inc Series 500 User s Manual Other Concurrent Measurements The SDI standard allows for other concurrent measurement commands such as C1 C2 etc The sensor supports the following optional concurrent measurements commands Measure psi using factory calibration Does not apply user scaling field calibration or offsets Returns 1 value and the units are fixed to psi Measure temperature Celsius or Fahrenheit This returns two values the temperature and the units The units will be 0 for Celsius and for Fahrenheit Measure user scale factors user s ope user offset field calibration offset Use this if you want to view user entered values that can affect the value returned aC4 Measure calibration lab slope and offset Use this if you want to view the calibration lab values that can affect the value returned This command requests a concurrent high accuracy printed circuit board PCB temperature This command requests concurrent battery voltage This command combines CO and C2 for both pressure and temperature Remember to issue the D0 command after the measurement is complete after estimated time for completion expires in order to r
3. ae 12 a Service Request response Service Request resp returned in 001 seconds 2 is number values in DO resp NOTE Make sure you use XUU command to set the slope and offset for the desired user units aud u is units selected ag is number of digits to right of decimal point www PressureSystems com Pressure Systems Inc Series 500 User s Manual Command Function Syntax Sensor Response Set aXUTu a0011 Temperature Units 0 Celsius a Service Request response 1 Fahrenheit Service Request resp returned in 001 seconds 1 is number values in DO resp aD0 au Example aXUT 1 Set units Fahrenheit u is units selected XUU Set User Units aXUUso a0012 s is signed user slope a Service Request response o is signed user offset User output psi Service Request resp returned in user slope user offset 001 seconds 2 is number values in DO resp aD0 aso Example s is user slope aXUU 27 63 0 o is user offset 27 63 inches per psi NOTE A slope of 0 is invalid NOTE Be sure units of pressure XUP are set to user units 9 29 www PressureSystems com Pressure Systems Inc Series 500 User s Manual 7 0 Calibration The sensors undergo a rigorous screening and testing at the factory before they are shipped to ensure that they meet their accuracy specifications over te
4. and u is an optional units indicator Both v and u have the format of a polarity sign or followed by up to seven avvv digits including a decimal point Format returned depends on the command variation The u indicates the units of the measurement according to the following tables units are feet of water units are psi units are kilopascal units are cm of water units are meters of water units are mm of water units depend on user entered scale factors slope and offset OnNMBBWNrK SO 9 www PressureSystems com Pressure Systems Inc Series 500 User s Manual If the field calibration offset is non zero then one of the following values of u will be returned 10 units are feet of water with non zero field calibration offset 11 units are psi with non zero field calibration offset 12 units are kilopascal with non zero field calibration offset 13 units are cm of water with non zero field calibration offset 14 units are meters of water with non zero field calibration offset 15 units are mm of water with non zero field calibration offset 19 user units with non zero field calibration offset psi field calibration offset user slope user offset set by XE or XS set by XUU set by XUU If the unit has had its calibration modified at a standards lab other than at Pressure Systems Inc then the value returned for u will have one hundred 100 added to it In other words if the
5. 1252 510000 Be prepared to supply the following information when requesting the RMA Transducer part number Serial number Complete description of problems symptoms Bill To and Ship To address Purchase order number not required for warranty repairs Customer contact and telephone number The above information including the RMA number must be on the customer s shipping documents that accompany the equipment to be repaired Pressure Systems also requests that the outside of the shipping container be labeled with the RMA number to assist in tracking the repairs All equipment should be sent to the following address ATTN KPSI TRANSDUCER REPAIR DEPARTMENT 7 digit RMA number Pressure Systems Inc 34 Research Drive Hampton Virginia 23666 or in Europe Pressure Systems Ltd 124 Victoria Road Farnborough Hants GU14 7PN United Kingdom 34 www PressureSystems com Pressure Systems Inc Series 500 User s Manual Prior to returning to Pressure Systems the transducer and cable must be cleaned per instructions provided on the cleaning certificate supplied when the transducer was delivered The certificate can also be found on Pressure Systems website at www PressureSystems com cleaning html The completed certificate must accompany the transducer when shipped to Pressure Systems If the transducer has been used in media other than potable water PSI customer service must be notified at the same time an RMA number is r
6. change the default sensor address Otherwise skip this section A unique address assigned to each sensor is an absolute requirement for multiple sensors to share the same wiring When the data recorder needs data from a particular sensor it requests data using a particular address Only the sensor with the matching address can reply Two or more sensors with same address replying will garble this reply The factory default SDI 12 address 0 is best reserved only for single sensors operating alone on dedicated wiring Using the Get Set Sensor Address Commands No other SDI 12 sensors connected to the system should be set to address 0 or to the desired sensor address Hint If you do not know the address of a particular sensor first use the Get Unknown Address command to have the sensor identify itself Its syntax is as follows 7 NOTE There can be only one SDI 12 sensor connected to common wiring in order for the Get Unknown Address command to work The SDI 12 command for changing a sensor s address is A Set Sensor Address aAn Where a is the current address of the sensor n is the new SDI 12 address Valid addresses are 0 to 9 A to Z a to z The sensor will issue a reply message in response to the command if the command was recognized The message will be the new address n Note that both commands above follow the SDI 12 standard of ending with a terminator As an example the following Set Sensor Ad
7. command was an M or C above example response would be the avu form and would indicate that the water level of sensor 0 is at 10 23 feet NOTE If address is returned alone with no data and unit values this indicated that there is no data available Either a Start Measurement command was not issued the command was aborted by sending a new command before the measurement time expired or an expected Service Request response was not yet received www PressureSystems com Pressure Systems Inc Series 500 User s Manual Command Function Syntax Sensor Response Identify Sensor Start Non Concurrent Pressure Measurement Start Non Concurrent Factory Pressure Measurement factory calibrated value always in psi 23 al3 KPSI 500 hhh ssssss vvv 13 Supports SDI Version 1 3 commands KPSI Manufacturer 500 Model number hhh Hardware revision SSSSSS Serial number VVV Software revision attt2 a Service Request response 2 is number values in DO resp apu or aputu P is pressure value u is units indicator Use XUP command to set units If XUM 1 command executed then temperature value and units code tu also appended attt 1 a Service Request response 1 is number values in DO resp ap 6699 p is pressure value psi www PressureSystems com Pressure Systems Inc Start Non Concurrent
8. display the field calibration offset using the M3 command and verify it Re calibrate the offset Erroneous user slope and offset entered display the user slope and offset using the M3 command and verify 30 www PressureSystems com Pressure Systems Inc Series 500 User s Manual 8 2 Maintenance Typical maintenance for the sensor consists of checking the wiring to make sure it is not corroded or frayed checking the atmospheric vent tube to make sure it is intact and leak free and checking or setting the field calibration offset The vent filter provided with the Series 500 must be properly installed and maintained to insure trouble free operation in the long term Maintenance should be performed at least every 6 months in order to insure that the sensor meets the accuracy specifications The offset can be checked by venting the sensor to the atmosphere and taking a reading from the sensor If the sensor has been subjected to more than its maximum pressure the offset of the unit should be checked as described above SuperDry Vent Filter Desiccant or Aneroid Bellows Installation For vented gage Always install a desiccant vent filter or aneroid bellows immediately after transducer installation Failure to use one or the other could result in premature failure of the transducer which would not be covered by warranty If you use a desiccant filter you should establish a regular maintenance schedule You should cha
9. scheduled into production within 4 business hours of order receipt Our order desk fax number is 757 865 8744 or in Europe 44 1252 510099 E commerce Orders may be placed on line by visiting our e commerce site www LevelandPressure com Payment Net 30 terms from the invoice date are available upon approval of credit We require three 3 industry credit references and one 1 bank reference We accept Visa MasterCard American Express corporate checks money orders and cash We will also ship C O D via UPS Method of Delivery All orders are shipped freight on board FOB from our factory in Hampton Virginia USA We typically ship UPS but will use any shipper you specify The UPS charges are billed to your invoice Prepay amp Add except for C O D shipments Delivery Times Shipment for standard products is typically 10 working days from order placement Technical Support Monday through Friday during normal working hours 7 30 am through 5 30 pm Eastern time knowledgeable personnel are available for assistance and troubleshooting Contact Applications Engineering or the Customer Service Department at Pressure Systems 757 865 1243 or toll free 1 800 328 3665 in Europe 44 1252 510000 if your transducer is not operating properly or if you have questions concerning any of our products Minimum Order Charge 50 00 net after discount l www PressureSystems com Pressure Systems Inc Series 500 User s Manual
10. some command responses generate a main response which is followed ttt seconds later by a second response called the Service Request response In both cases a standalone colon will indicate this required following relationship between two commands and two responses To avoid unnecessary repetition of frequently used parameter descriptions in the table entries each occurrence of a simple a item always represents the address of the sensor Also ttt represents a common parameter of a main response time in seconds until data will be ready to read with a following D0 command All responses end with a non printable lt CR gt lt LF gt character pair which is not shown in the table Command Function Syntax Sensor Response Acknowledge Active 2 Get Unknown Address New in Version 1 2 of Note Sensor must be only sensor SDI 12 spec on SDI 12 bus when this command given Otherwise a communications collision occurs when multiple sensors respond Set Sensor aAb b Address b is new address b is new address Example 5A9 sets previous address 5 to new address 9 18 www PressureSystems com Pressure Systems Inc Start Concurrent Pressure Measurement after which you must send the Get Data command Start Concurrent Factory Pressure Measurement pressure in psi the factory calibrated value Start Concurrent Temperature Measurement 19 Ser
11. the measurement time for a sensor expires the data recorder polls that sensor for its data 8 www PressureSystems com Pressure Systems Inc Series 500 User s Manual 5 5 1 Starting a Non Concurrent Measurement M v command The original command to tell the sensor to start a measurement non concurrently is Where a is the address character and M v is a Start Non Concurrent Measurement command An optional digit v identifies command variations Most data recorders will issue this command and automatically handle the reply to collect data You can also issue the command yourself In reply the sensor will respond with Acknowledges it is from sensor with address a that ttt seconds are required before the measurement is completed and n values will appear in final data stream acquired When the measurement is complete the sensor sends a second response called a Service Request le Where Service Request response contains only a the address of the sensor Note that you still have no data from the sensor To get data enter the Get Data command to sensor Where a is the address character and DO is the command to retrieve measured data Note The number zero follows D not the letter O Depending on the variation of the command the sensor will reply with one of these response formats Where a is the address v is a data value
12. two forms The first form causes the sensor to make pressure readings and automatically compute a new offset use this form of command only if you vent the sensor to the atmosphere Use the second form when the sensor is at a stable known pressure For example after venting the sensor at address 0 to the atmosphere the following command 15 www PressureSystems com Pressure Systems Inc Series 500 User s Manual would cause a new offset to be computed 0XS If the same sensor was under pressure and stable at 4 65 feet of H 0 the following command would adjust the offset to ensure the 4 65 foot offset 0XS 4 65 0 If the same sensor was under pressure and stable at 5 00 psi the following command would adjust the offset to ensure the 5 00 psi offset 0XS 5 00 1 When the sensor has completed self calibration the new offset is stored into memory A response attt is returned by any of the above command forms It indicates that command last send to sensor at address a will be complete in ttt seconds and one 1 value offset in units of psi will be returned in the response to a subsequent D0 command The offset can also be displayed at any time using the M3 command Remember The units for the displayed field calibration offset will be psi regardless of the units you used in the XSdu command 16 www PressureSystems com Pressure Systems Inc Series 500 User s Ma
13. 8 TO 28 VDC Sensor Connections to 9 Pin and 25 Pin D Shell RS 232 Serial Port www PressureSystems com Sensing the Envir nment www PressureSystems com ISO 9001 2000 Certified Measurement Specialties Inc 34 Research Drive Hampton VA 23666 USA Phone 757 865 1243 Toll Free 800 328 3665 Fax 757 865 8744 E mail sales PressureSystems com Order on line www LevelandPressure com Copyright Pressure Systems Inc 2009
14. Temperature Measurement Start Non Concurrent Scale Factor Measurement user slope user offset and field calibration offset Start Non Concurrent Standards Lab Scale Factor Measurement standards lab calibration slope and calibration offset 24 Series 500 User s Manual Command Function Syntax Sensor Response attt2 a Service Request response 2 is number values in DO resp atu t is signed temperature u is units 0 Celsius 1 Fahrenheit Use XUT command to set units a0013 a Service Request response 3 is number values in DO resp asoc s is signed user slope o is signed user offset psi c is signed field cal offset psi a0012 a Service Request response 2 is number values in DO resp aso 66 99 s is signed cal slope o is signed cal offset psi www PressureSystems com Pressure Systems Inc Series 500 User s Manual Command Function _Syntax__ i ___Sensor Response Start Non Concurrent High Accuracy PCB Temperature Start Non Concurrent Pressure and Temperature Measurement M6 Start Non Concurrent Battery Voltage Measurement attt2 a Service Request response 2 is number values in DO resp atu t is signed temperature u is tunits 0O Celsius 1 Fahrenheit Use XUT command to set units a0021 a Service Request resp
15. XC command has been utilized to set the calibration scale factor slope to other than 1 or the calibration offset factor to other than 0 then 100 will be added to the unit s indicator 5 5 2 Starting a Concurrent Measurement C v command The command to tell the sensor to start a concurrent measurement is Where a is the address character and C v is a Start Concurrent Measurement command An optional digit v identifies command variations In reply the sensor will respond with atttnn Acknowledges it is from sensor with address a that ttt seconds are required before the measurement is completed and nn values will appear in final data stream acquired Note the 2 digit nn returned allows for a larger number of data items to be returned in the eventual data response though not utilized by model 500 sensor When the measurement is complete the sensor does NOT issue the second response known as a Service Request response as did an M command To request the data you must enter the Get Data command only after the first response s estimated time for completion ttt has expired data Note the number zero follows D not the letter O a Where a is the address character and D0 is the command to retrieve measured 10 www PressureSystems com Pressure Systems Inc Series 500 User s Manual Depending on the variation of the command the sensor wi
16. ansducer s surface by rinsing it in a mile detergent Direct probing of the diaphragm or attempts to remove protective screens will damage the sensor and void the warranty Qy Most users either suspend the Series 500 transducer in a perforated 1 mounnne sracker inch or 2 inch PVC instrumentation free well or attach the transducer using our optional 2 inch MNPT to a rigid conduit Some applications use our optional mounting bracket PN 49 06 00PC to clamp the transducer to a fixed object i e wall ladder step Alternatively because our cable has a 200 pound pull strength the Series 500 may be suspended 4 www PressureSystems com Pressure Systems Inc Series 500 User s Manual without any protective still well mounting clamp or supporting cables However users often use our cable hanger PN 12 90 0931 This sensor device slides onto the cable from the bare wire end The cable hanger may be positioned anywhere on the cable by pushing the ends together Once positioned the cable hanger contracts to provide a snug grip The Series 500 vent filter should be changed when it is 75 spent pink Do not remove the old vent filter until a new one is available The number one failure mode of our transducers is moisture and corrosion damage due to lack of maintenance of the vent filter Remember to remove the yellow protective cap upon activation This will allow air to circulate into the desiccant fill 5 0 Operati
17. be longer than is needed for your installation it is recommended that the excess length be accommodated in a service loop and that the potted end of the cable NOT be shortened The cable attached to your Series 500 is specifically engineered for submersible applications The outer jacket provides long term reliability under most conditions The cable should be handled carefully however as the jacket may be subject to cutting should it be raked over extremely sharp edges To guard against water incursion should an inadvertent cut occur we have incorporated an exclusive water block feature immediately beneath the jacket This feature makes the cable self sealing in all but the most extreme cases The cable is fully shielded with the shield connected to the metal housing at the transducer end and terminated in a blue insulated wire at the termination end The shield should always be terminated to a good earth ground unless the transducer is installed in an area where electrolysis corrosion is known to be a serious problem Surge lightning protection is offered as an option PN OPTION 012 for your Series 500 transducer This is achieved through the use of two 2 separate protectors One is located in a 4 inch long 1 inch OD 316 SS housing extension attached directly to the non pressure sensing end of the transducer The other protector is located at the surface and grounded via a DIN rail or ground wire Whether lightning protectio
18. clean water and wipe dry the external casing only Place the protective screen in the same solution for 15 20 seconds rinse and wipe dry Step 4 Holding the transducer in a vertical position so that you can see the face of the pressure sensor screw the protective nose piece back into place 9 0 Warranty and Product Return Procedures 9 1 Warranty Any transducer that is less than 2 years old see DOM which does not meet the product s specifications and exhibits no physical damage to the housing sensor or cable cuts will be replaced under warranty Units 2 3 years old Units that fall within this age group and exhibit no obvious physical damage to the housing sensor or cable cuts are replaced at a discounted list price Units greater than 3 years old Units that fall within this age group are not repaired or replaced under warranty 33 www PressureSystems com Pressure Systems Inc Series 500 User s Manual 9 2 Merchandise Return Procedures Contact the Applications Support Group or the Customer Service Department at Pressure Systems if your transducer is not operating properly The staff is available for troubleshooting at 757 865 1243 or toll free at 1 800 328 3665 during normal working hours Eastern time If your transducer or accessory needs to be returned to Pressure Systems obtain a Returned Merchandise Authorization RMA from the Customer Service Department prior to shipment In Europe please call 44 0
19. curacy is maintained over the temperature range of 0 to 50 C Selectable units The sensor can be configured to output the data in psi feet of water kilopascal centimeters of water meters of water millimeters of water or customer defined units Non Volatile Setup The setup is stored in EEROM and remains even when power is removed from the sensor Wide operating voltage The sensor operates over the voltage range of 8 to 28 VDC 2 www PressureSystems com Pressure Systems Inc Series 500 User s Manual 3 0 Cabling and Wiring Most installations using the Series 500 transducer connect our polyurethane or Tefzel cable to a junction box From this junction box users run their own cable to the required instrumentation Polyurethane is used for most applications while Tefzel is recommended for highly corrosive environments The Series 500 is intended for applications with requirements that include battery powered operation with minimal current drain low system cost and use of a single recorder with multiple sensors attached It will accommodate cable lengths between sensors and recorder up to 200 feet The vented cable termination end is prepared at the factory to eliminate future moisture migration down its length It may be noticed where the lead wires emerge from under the jacket that potting material plus a shrink tube boot have been added Every effort should be made to leave this feature intact Should the cable
20. dress command would set the sensor address from 0 to 5 0A5 The sensor will respond with the new address which is 5 Subsequently the address can be set to a different address 9 for example by the command 5A9 6 www PressureSystems com Pressure Systems Inc Series 500 User s Manual 5 3 Verifying the Address and Operation The sensor will respond with an identifying message when it receives the Identify command I The format of the command is ant Where a is the address for the sensor The sensor will reply with a13 KPSI 500 hhh ssssss vvv Where a is SDI 12 address 13 is SDI protocol version read 1 3 KPSI is Manufacturer 500 is KPSI Model Number hhh is Hardware revision level ssssss is Sensor serial number up to 8 char yyy is Software version If you do not get a reply check the address setting for the sensor and make sure you use the proper address 5 4 Command Functional Overview The commands to set up and operate the sensor are those defined by the SDI 12 specifications Version 1 0 Version 1 1 Version 1 2 and Version 1 3 plus extended commands defined by KPSI Note ALL SENSOR COMMANDS ARE UPPER CASE All commands start with a single character address and end in an exclamation point The address is a single character with values 0 to 9 A to Z ora to z Values are entered in the form of a polarity sign or followed by up to
21. easurement is complete the sensor responds with an extra Service Request response eee al Where a is the address character 11 www PressureSystems com Pressure Systems Inc Series 500 User s Manual As in all of the other non CRC M and C commands a D0 command must eventually be issued to get the data from the sensor In its response three data measurements and a CRC appendage are returned as follows a 3 14 2 718 1 414Ipz_ where Ipz is the three character CRC code appendage Other Non Concurrent Measurements The SDI standard allows for several other measurement command variations such as M1 M2 and the like The sensor supports the following ones aM1 Measure psi using factory calibration Does not apply user scaling field calibration or offsets Returns 1 value and the units are fixed to psi aM2 Measure temperature Celsius or Fahrenheit This returns two values the temperature and the units The units will be 0 for Celsius and for Fahrenheit Measure scale factors user slope user offset and field calibration offset Use this if you want to view user entered values that can affect the value returned lab values that can affect the value returned This command requests high accuracy PCB printed circuit board temperature This command requests battery voltage This command combines MO and M2 for both pressure and temperature Remember to issue the D0
22. ee 13 5 54 Changing the Wits orrena oce enari ad aa wk ea way ewe een 14 5 5 5 Setting User Units ise a IA e a eee ee 14 5 5 6 Field Calibration ori anera rada EEE Shs ee a ae AREA 15 5 6 Configuring the Averaging Time lt 00 aie ois Chew ee en SS Rae cee SES 17 6 0 Alphabetic Command Reference cc cee cece cece e cece eee eens 18 7 0 Calibration 47s iesi6 deters aie oE aa a ed ea EE O sade Cate ge Welowe s taut sarees 30 8 0 Troubleshooting and Maintenance 0 c cece ee eens 30 8 1 Troubleshooting e s eeen ae Ge iad 4b aaa eine ab Oat ine Meats 30 Be Maintenance mrss e sd ie Genres Bath a it Ged A SE Ga A BaD 31 General Maintenance Tips lt u csc aan dd opted Wee BAN ORR 32 9 0 Warranty and Product Return Procedures ccc eee ec cece ee eeees 33 9 1 Warranty oera eei acter A cece wth e EEE ah aa EE ct Ad ntl AE eter E EEE a al ua 33 9 2 Merchandise Return Procedures nunun nannaa neare 34 Appendix A Connecting Transducer To PC ccc cece cece eee eee eens A 1 iv www PressureSystems com Pressure Systems Inc Series 500 User s Manual This page intentionally left blank v www PressureSystems com Pressure Systems Inc Series 500 User s Manual 1 0 Order Administration Order Entry We accept orders by fax phone mail and e mail To ensure accuracy all orders are reviewed by technical specialists before being submitted for production Orders are
23. equested PSI reserves the right to reject any shipment deemed to be unsanitary or environmentally unsafe to handle If these guidelines are not met the package will be sent back unopened and at the customer s expense Please include the attached vent filter or aneroid bellow with each returned transducer Pressure Systems will return warranty items prepaid via UPS GROUND If the customer desires another method of return shipment Pressure Systems will prepay and add the shipping charges to the repair bill Incoming freight charges are the customer s responsibility The customer is also responsible for paying shipping charges to and from Pressure Systems for any equipment not under warranty Once the return is received it typically takes 5 10 working days for the technician to make a fault determination 35 www PressureSystems com Pressure Systems Inc Series 500 User s Manual ee Appendix A Connecting the Series 500 Transducer to a PC If there is a need to connect a Series 500 transducer to a personal computer PC rather than to an SDI 12 compatible data recorder an easily built adapter circuit may be installed between the three wire sensor connection and the 9 pin or 25 pin D shell connector of the PC s serial port EXCITATION POWER SUPPLY EXCITATION RED BLACK SDI 12 Configuration Note This diagram depicts a typical installation Refer to your power supply and instrumenta
24. erate the second Service Request response and can return a larger number of values nn limited to 99 This format is generated by a newer concurrent measurement commands see C v commands below If you issued the Change Sensor Address command or the Identify command described in the previous sections you already have some experience with using commands There are other commands available to make measurements set the type of output units for the measurements perform special scaling of the measurements do field calibration and the like The following sections describe the commands by function 5 5 Making a Measurement There are two classes of measurement commands which will be referred to as Start Non Concurrent Measurement M v commands and Start Concurrent Measurement C v commands In the first class the data recorder issues the measurement command and then waits for the sensor to complete the measurement before continuing the data collection cycle Only one sensor can be accessed at a time and a maximum of nine parameters can be returned With Version 1 2 of the specification concurrent measurements are permitted With a concurrent measurement the data recorder can request the sensor to take a measurement determine how long it will be until the sensor has a reading and then continue making requests to other sensors on the SDI 12 bus This way multiple sensors are taking measurements concurrently Once
25. etrieve the data 13 www PressureSystems com Pressure Systems Inc Series 500 User s Manual 5 5 4 Changing the Units As noted above all Start Measurement commands can return the pressure in several different units The selection of the units is made using the XUP command Where n is one of the selections from the following table and d is the signed data display scaling number of digits to the right of the decimal point appropriate to the new units ft of water The conversion of feet of water uses the factor 2 3073 ft per psi Pounds per square inch default conversion factor 1 The conversion factor is 70 3265 cm per psi m of water The conversion factor is 0 703265 m per psi The conversion factor is 703 265 mm per psi user units The value has units that depend on the factor entered using the XUU command For example the following command to sensor 0 OXUP 0 2 will specify the output to be in the default units feet of water with a resolution of 2 decimal places The second parameter 2 in the example is optional If omitted the scaling is not changed 5 5 5 Setting User Units If you want the sensor to read out in units other than feet of water psi kPa centimeters of water meters of water or millimeters of water you will need to use the XUP command to set the units to 9 user units When user units are selected the software will use the equation Outp
26. ies 500 User s Manual Command Function syntax sensor Response attt02 02 is number values in DO resp apu p is pressure value u is signed units indicator Units set by XUP command If XUM 1 command executed then temperature value and units code tu also appended attt0 1 01 is number values in DO resp ap 6699 p is pressure value psi attt02 02 is number values in DO resp atu t is signed temperature i 33 is units 0 Celsius and 1 Fahrenheit Use XUT command to set units www PressureSystems com Pressure Systems Inc Series 500 User s Manual Command Function __ Syntax Sensor Response Start Concurrent Scale Factor Measurement user slope user offset and field calibration offset Start Concurrent High Accuracy PCB Temperature C4 Start Concurrent Standards Lab Scale Factors Measurement calibration slope and calibration offset a00103 03 is number values in DO resp asoc 66 99 s is signed user slope o is signed user offset psi c is signed field cal offset psi a00102 02 is number values in D0 resp aso 66 99 s is signed cal slope o is signed cal offset psi attt02 02 is number values in DO resp atu t is signed temperature u is u
27. ll reply with one of these response formats Where a is the address v is a data value and u is an optional units indicator Both v and u have the format of a polarity sign or followed by up to seven avvv digits including a decimal point Format returned depends on the command variation The u indicates the units of the measurement as was already defined in the tables and text at the end of Section 4 5 1 above 5 5 3 Measurement Command Variations To enhance the error detection capability in SDI 12 data collection systems variations of the Start Non Concurrent Measurement commands M M1 M9 and Start Concurrent Measurement commands C C1 C9 are available One variation requests that the data be returned with a 16 bit Cyclic Redundancy Check CRC appended It adds a C to command such as MC MC1 CC or CC1 The number of measurements returned in response is the same as the measurements returned for a non CRC command but with a CRC appendage following them An example of such a command follows aMC Where a is the address character M is a basic command to make a measurement and C is the added command letter requesting a CRC appendage The sensor might respond with measurements will be ready to read with DO command a0053 Acknowledging it is at address a and indicating that after 5 seconds three 3 When an M command m
28. measurement SPECIALTIES 0o KPSI Transducers Series 500 SDI 12 Transducer User s Manual July 2006 Contact Us 800 328 3665 Visit us on the Web www PressureSystems com On Line Transducer Store www LevelandPressure com Pressure Systems Inc Series 500 User s Manual This User s Manual is a copyright product of Pressure Systems Inc 2006 Permission is hereby granted to make copies and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies SDI 12 is a standard for interfacing data recorders with microprocessor based sensors such as Pressure Systems Series 500 submersible transducer SDI 12 stands for serial digital interface at 1200 baud The current version of the SDI standard Version 1 3 upgrades Version 1 2 dated October 1996 The Series 500 is compliant with Version 1 3 of the SDI 12 standard i www PressureSystems com Pressure Systems Inc Series 500 User s Manual Our Company Pressure Systems is an ISO9001 2000 certified manufacturer of submersible and above ground pressure transducers for environmental industrial and municipal applications Our KPSI Transducers have been specified in thousands of projects throughout the world by geologists system integrators national engineering firms and a variety of government agencies Typical applications include but are not limited to pump co
29. mperature Any drift in the zero of the unit can be easily checked by exposing the unit to atmosphere and performing a measurement Any drift can be nulled out via the XS command For optimum accuracy the offset drift should be nulled out at least every 6 months The thermal calibration will remain accurate for the life of the transducer 8 0 Troubleshooting and Maintenance 8 1 Troubleshooting The following checklist will help in troubleshooting problems PROBLEM POSSIBLE CAUSE No data Faulty wiring check all wiring and terminations n No power check fuse in the data recorder and power at sensor Wrong address requested make sure the data recorder is set up to request data at the proper address Wrong address set in sensor use the identify command to make sure the sensor is responding to the proper address Command or address is wrong case all SDI 12 commands are capital letters Make sure address is proper case and commands are upper case Garbled data Multiple sensors set to the same address check address settings of all SDI sensors Remove all other sensors from the recorder and add them one at a time Communication is defined to be 1200 E 1 Command issued to a wild card address or Remove all other sensors from the recorder and try again Erroneous data Wrong units selected use the M command and look at the units field Verify that the desired units are selected Erroneous offset entered
30. n is employed or not the cable shield is left exposed as mentioned previously so that the shield may be attached to an earth ground SDI 12 Wiring Only three wires are needed to use the SDI 12 interface A fourth wire cable shield blue is added for user convenience See diagram next page I Serial data white SDI 12 interface between sensors and data recorders 2s Ground black Supply return and earth ground 3 Supply red This line is internally regulated and can accept 8 28 VDC See Appendix A for connecting a sensor to the RS 232 serial port of a personal computer 3 www PressureSystems com Pressure Systems Inc Series 500 User s Manual EXCITATION POWER SUPPLY EXCITATION E SDI 12 V Configuration RED BLACK CABLE HANGER Note This diagram depicts a typical installation Refer to your power supply and instrumentation manufacturer for the specifics of your application 4 0 Installation The Series 500 is designed for rugged use however it needs protection from over pressure and sharp impact It is designed to be used in a vertical orientation with the sensing diaphragm facing downward For greatest accuracy re calibrations should be performed with the transducer in this position When lowering the Series 500 transducer into a liquid penetrate the surface slowly and only to the depth necessary Avoid dropping the unit from above the surface Clean the tr
31. nge your vent filter when it is 75 spent pink color Replacement filters are available at a nominal cost from the factory Do not remove the old vent filter until a new one is available The most common failure mode of our transducers is moisture and corrosion damage due to lack of use or maintenance of the vent filter Remember to remove the filter s protective black cap upon installation This will allow air into the desiccant filter and allows the transducer to properly vent with changes in barometric pressure To install replace either the aneroid bellows or the vent filter simply unplug the old unit from the vent tube and plug the 0 062 x 1 stainless steel connector tube supplied with each type of filter into the vent tube Installation and mounting instructions are supplied with each aneroid bellows and vent filter The diagram on page A 4 shows typical vent filter and aneroid bellows hookups 31 www PressureSystems com Pressure Systems Inc Series 500 User s Manual General Maintenance Tips l Desiccant Maintenance If you use a desiccant vent filter you should establish a regular maintenance schedule You should change your vent filter when it is 75 spent pink color Replacement filters are available at a nominal cost from the factory Do not remove the old vent filter until a new one is available Also always remove the filter s protective cap when in use Remember that Pressure Systems improved 810 SuperD
32. nits 0 Celsius 1 Fahrenheit Use XUT command to set units www PressureSystems com Pressure Systems Inc Series 500 User s Manual Command Function Syntax Sensor Response Start Concurrent Battery Voltage Measurement Start Concurrent Pressure and Temperature Measurement 2 a00201 01 is number values in DO resp av y is signed battery voltage attt04 04 is number values in DO resp aputu p is tpressure value 1 u is units index Units set by XUP command t is temperature value 2 u is 0 Celsius or 1 Fahrenheit Use XUT command to set units www PressureSystems com Pressure Systems Inc Series 500 User s Manual Command Function syntax sensorResponse i NOTE This command is only issued after a Start Measurement various M v or C v command It should not be issued until measurement time returned in response has expired or extra Service Request response has been received after a Start Non Concurrent Measurement various M v command is issued Example 0D0 Send Get Data command to sensor 0 22 av or avu or avv or avvv p is pressure value t is temperature value y is other non specific value is units indicator see pressure units tables for DO in Section 5 5 apu aputu or u 9 Example 0 10 23 0 If previous measurement
33. ntrol tank level monitoring sewage lift station operation reservoirs weirs flumes site remediation storm water well monitoring pump pipeline pressures and compressor pressures Website and E Mail Visit our website at www PressureSystems com to view our latest new product releases application notes product certifications and specifications as well as IS control installation drawings E mail your questions and comments to us Sales PressureSystems com E commerce Orders may be placed on line by visiting our e commerce site www LevelandPressure com or by contacting the factory or local representative Our Firmware and Publication Disclaimer This user s manual was prepared for the current firmware and software releases at the time of the manual publication This document has been thoroughly edited and is believed to be reliable Pressure Systems assumes no liability for inaccuracies Addenda will be distributed as deemed necessary by Pressure Systems All computer programs supplied with your products are written and tested on available systems at the factory Pressure Systems assumes no liability for other computers languages or operating systems Pressure Systems reserves the right to change the specifications without notice Any questions regarding firmware upgrades may be addressed to Applications Engineering Application software and transducer firmware revisions as well as manual addenda may be obtained from the Pressure Sys
34. nual 5 6 Configuring the Averaging Time Setting the Averaging Time The sensor supports user selectable averaging time for SDI 12 readings The time period in seconds is specified with the following command where t is the signed time in seconds The example command 0OXT 10 will set the averaging time to 10 seconds for a sensor at address 0 The averaging time is not the same as the time until completion of a reading When the sensor is awakened by the SDI 12 data recorder and a measurement is requested the sensor calibrates its internal A D converter before taking the reading This removes any drift from the analog readings before the pressure measurement is started 17 www PressureSystems com Pressure Systems Inc Series 500 User s Manual 6 0 Alphabetic Command Reference This section documents all the commands supported by the Series 500 transducer All commands are listed alphabetically in a large table with four 4 columns containing the following information Command a 1 3 letter abbreviation operation code for the command Function a functional description of the command Syntax a complete rendering of the command s structure Sensor Response a description of the response s returned by sensor Some commands require another special Get Data command D0 to follow them immediately or after a delay of ttt seconds as indicated by a parameter in the main response Also
35. on Your Series 500 was shipped from the factory preset to address 0 zero and with the pressure units set to those requested in your order However if modifications are required for your application you should familiarize yourself with the steps and commands needed to alter the setup of the Series 500 To issue commands to the sensor via SDI 12 you will need to connect it to a data recorder that is capable of issuing standard and extended SDI 12 commands Follow the instructions in Section 4 4 in order to issue these commands 5 1 Nomenclature All commands have three components the sensor address the command body and the command termination The sensor address is a single character and is the first character of a command In the examples that follow it is usually the number 0 the default address as shipped from the factory The command body and the responses are shown as a combination of upper and lower case letters The upper case letters are the fixed portions of the command the lower case letters are the variables or values In the specific examples you will see that the lower case letters are replaced with actual numbers See Section 5 All commands are shown with an exclamation point as the command terminator 5 www PressureSystems com Pressure Systems Inc Series 500 User s Manual 5 2 Setting the Address If you are using the sensor connected to common wiring with other SDI 12 sensors you may need to
36. onse 01 is number values in DO resp av y is the battery voltage attt4 4 is number values in DO resp aputu p is pressure value 1 u is units index Units set by XUP command t is temperature value 2 u is 0 Celsius or 1 Fahrenheit Use XUT command to set units www PressureSystems com Pressure Systems Inc Series 500 User s Manual Command Function Syntax Sensor Response Start Continuous Measurements unimplemented Initiate Verify Sequence Set Field aXEou Calibration Offset o is signed offset u is units O feet of water 1 psi aD0 Example aXE 0 05 0 set offset to 0 05 feet 26 Note address return indicates unimplemented command a0013 a Service Request response aefg e is executed 1 YES 0 NO f is number unexpected interrupts g is t interrupt code Example a 1 0 0 is normal a0011 a Service Request response Service Request resp returned in 001 seconds 1 is number values in DO resp ao o signed offset value psi www PressureSystems com Pressure Systems Inc Series 500 User s Manual Command Function syntax sensor Response Recalculate aXS or aXSdu Field Calibration d and u are optional Offset signed values When omitted sensor is assumed to be vented to atmosphere When supplied d is desired
37. reading for sensor and i in units indicated by u The sensor will make a measurement and recalculate the field offset to ensure reading matches values entered Set Averaging aXTt Time 619 a averaging time in seconds 0 to 25 27 attt1 Service Request response Service Request resp returned in ttt seconds 1 is number values in D0 resp ao 66 99 o is new offset psi nou 1 Service Request response Service Request resp returned in 001 seconds 1 is number values in D0 resp as 66 99 s number samples to be averaged during selected time www PressureSystems com Pressure Systems Inc Series 500 User s Manual Command Function syntax sensorResponse Set Read Measurement Mode of M MO C CO MC MCO CC CCO Commands Drop optional argument m to Read mode Set Pressure Units aXUM m m missing to read mode or m 0 to set mode for pressure data only default or m 1 to set mode for pressure data and temperature data just like M7 C7 MC7 CC7 commands aDO0 aXUPn d 0 feet of water l psi 2 kPa 3 cm of water 4 m of water 5 mm of water 9 user units d optional number of places to right of the cect point aD0 28 attt1 a Service Request response Service request resp returned in m seconds is number values in DO resp 0 Press only or 1 Press and Temp
38. ry Vent Filter is designed to be effective for at least one year before requiring replacement Clogged Nose Piece or Dirty Diaphragm Either of these conditions could result in erroneous readings from your transducer NEVER attempt to clean your transducer s nose piece or diaphragm with a sharp or hard object This could dent the sensor diaphragm and cause permanent damage to the transducer Your transducer may be cleaned in accordance with the procedures listed in step 4 below Cleaning your transducer Materials required Plastic bowls 8 12 inches 200 300 mm in diameter and 4 6 inches 100 150 mm deep Supply of clean lint free cleaning rags 32 ounce bottle of The Works Tub and Shower Cleaner a mild detergent manufactured by Lime O Sol Company in Ashley IN 46705 and available locally through Wal Mart K Mart Target and Ace Hardware stores at 2 to 4 per bottle Preparation Prior to cleaning your pressure transducer ensure that all procedures have been followed in the proper cleaning of the cable and transducer to remove any hazardous materials The vent filter or bellows must be properly attached The cable should be coiled to ensure ease of handling and it must be protected against the possibility of accidental abrasion and or penetration of the cable jacket by sharp objects A lead length of 1 to 1 feet 0 3 0 45 m of cable from the transducer should be allowed to facilitate handling during cleaning The pro
39. seven digits including a decimal point The commands are in ASCII and all the replies use printable ASCII characters followed by lt CR gt lt LF gt The case of the letters is important An A is not the same as an a The sensor replies to all SDI commands it supports If the sensor receives a command it does not support no reply is made The reply response will have one of three forms a0000 Where a is sensor address and 0000 indicates that no further message to be sent 7 www PressureSystems com Pressure Systems Inc Series 500 User s Manual Where a is sensor address ttt is time in seconds sensor needs to make the measurement or process command and n is the number of data values limited to 9 that may be fetched by the Get Data D0 command when data is ready In this older form the sensor responds a second time with its address a when the data is ready if ttt was not 000 This second response is called a Service Request response This format is generated by older non concurrent measurement commands see M v commands below and other older commands atttnn Where a is sensor address ttt is time in seconds sensor needs to make the measurement or process the command and nn is the number of data values that may be fetched by the Get Data D0 command when data is ready This newer response format in SDI Version 1 2 and later does not gen
40. tective covering or similar protective device that is shipped with each transducer should be attached to the transducer at all times It should only be removed prior to installation or cleaning Your work surface needs to be clean and free of clutter and large enough to accommodate all materials required in addition to the transducer and cable Fill one of the bowls with fresh water one with a mild detergent mixed with water and the last with 16 ounces 0 45 kg of The Works 32 www PressureSystems com Pressure Systems Inc Series 500 User s Manual Cleaning Step 1 Holding the cable 6 inches 150 mm from the transducer immerse the unit in the bowl containing the mild detergent and stir for 20 30 seconds Remove and rinse in the bowl containing the fresh water using the same stirring motion used in the mile detergent Rinse and wipe dry Step 2 Holding the body of the transducer with one hand so that you are looking at the retaining screen protecting the sensor carefully remove the sensor nose piece by simply unscrewing it from the sensor body Do not touch the sensor diaphragm with your finger or any other object Also do not try to dry the inside portion of the transducer as you risk damaging the pressure sensor Step 3 Place the transducer in a vertical position with the pressure sensing end facing downward in the bowl containing The Works solution for approximately 15 20 seconds Rinse in the bowl containing
41. tems web site www PressureSystems com ii www PressureSystems com Pressure Systems Inc Series 500 User s Manual This page intentionally left blank iii www PressureSystems com Pressure Systems Inc Series 500 User s Manual Table of Contents 1 0 Order Administration 6 5 598 pte cae N kg nee SUR OE OES eR ee ee 1 2 0 Product Introduction 6 65 56 556 See 6 sca wo Now hbo wea a a s Ao aw wl ale pa we a 2 3 0 Cabling and Wiring bisiei es oon Rae ow wR RRR BN ERR ROARS RRS 3 SDEI2 WING gcse eal i eliane reda ee ee Se tee ee ae ee wh Rs 3 4 0 Installation 6i5 s5 3 Sessss si arS ew dig Gee Gr area a E Re ude pi E ew ese Ain he eee o E 4 5 0 Operation sones 2G are ETO E ORONO RSS SEES EERE aS 5 5 1 Nomenclature tees riaa e n uE E a E Aes E E E E E E E ee 5 5 2 Setting he Address iascia tarar EE E E Se a ata 6 Using the Get Set Sensor Address Commands 0 005 6 5 3 Verifying the Address and Operation 00 c cece cence eens 7 5 4 Commands Functional Overview 00 ec ccc eee tenes 7 5 5 Making a Measurement cnc cero ott arak eo Oa ak eek aa to cae es Me hae enh 8 5 5 1 Starting a Non Concurrent Measurement M v commands 9 5 5 2 Starting a Concurrent Measurement C v commands 10 5 5 3 Measurement Command Variations 0 000 e eee eee 11 Other Non Concurrent Measurements 004 12 Other Concurrent Measurements 00 0000 e e
42. tion manufacturer for the specifics of your application This procedure involves the following steps 1 Connect the sensor s common power data black wire to the signal ground of the RS 232 connector and to the ground of an external power supply 2 Connect both the transmit and receive data lines of the RS 232 connector together thus forcing half duplex operation of the serial link The receive line will then see all transmitted data as well as all data received by the sensor 3 Since the signal swing of an RS 232 serial port s transmit data line is from 12 to 12 VDC for the two signal logic levels a diode must be installed between the bridged RS 232 data lines and the SDI compatible sensor s data line white wire This clips the negative swing thus providing a signal swing from 0 to 12 VDC to the sensor 4 Connect the sensor s power line red wire to an external power supply of at least 9 VDC A 9 volt battery will suffice in an emergency but will have limited life if the sensor is kept energized over a long period of time See drawing next page A 1 www PressureSystems com Pressure Systems Inc 9 PIN D SHELL FEMALE DATA WHITE ra us 1N4148 TO SENSOR K By GND 5 SIGNAL BLACK GND Vs RED EXTERNAL SUPPLY 8 TO 28 VDC Series 500 User s Manual 25 PIN D SHELL OR FEMALE DATA WHITE a Tx 1N4148 TO SENSOR K b GND 7 SIGNAL BLACK GND Vs RED EXTERNAL SUPPLY
43. ut psi slope offset Where slope and offset are values you can enter into the system 14 www PressureSystems com Pressure Systems Inc Series 500 User s Manual The XUU command is used to enter the user defined scale factors The format is Where s is the signed slope and o is the signed offset For example the following command will set the slope to 70 32 and the offset to 0 0 for sensor 0 which are the proper values to convert the psi to cm of water 0XUU 70 32 0 Similarly the slope and offset can be set to any values that will produce the desired units Remember that both an XUU and an XUP command are required for the sensor to report in user defined units 5 5 6 Field Calibration The sensor may have a change in the calibration over time The most common change is a change in sensor zero value read when the pressure is 0 The sensor has two commands that can be used to adjust for this change in zero The XE command allows direct setting of an offset which will be added to the measurement to compensate for this drift where o is the signed field calibration offset value with units u 0 feet 1 psi 2 kPa 3 cm 4 m 5 mm and 9 user units For example the command OXE 0 02 0 would set the offset pressure of sensor at address 0 to 0 02 feet u 0 The other command used to set the offset is the XS command and it has
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