(H-3123) Manual
Contents
1. diagnostic data for testing purposes Subsequent Command Response a 123 456 78 9 y lt cr gt lt lf gt Key Description Units 123 456 Fixed test data 78 9 Fixed test data y ROM checksum test 0 Failed 1 Passed 22 WATERLOG 501 12 Command amp Response Protocol 2 Command amp Response Protocol Send Identification Command The Send Identification Command responds with sensor vendor model and version data Any measurement data in the sensor s buffer is not disturbed Command Response all allceccccccconmmmmmvwvvxx xx cr If Where a is the sensor address 0 9 A Z a z x is an upper case ASCII character ll is the SDI 12 version compatibility level e g version 1 2 is represented as 12 cccccccc is an 8 character vendor identification to be specidied by the vendor and usually in the form of a company name or its abbreviation mmmmmm is a character field specifying the sensor model number is 3 character field specifying the sensor version number is an optional field of up to a maximum of 13 characters to be used for serial number or other specific sensor information not relevant to operation of the data recorder Example of an al command al2 DAA H 3123vvvS nnnnnnVhhh lt cr gt lt If gt H 3123 implementation of the optional 13 character field s nnnnnnVhhh 12 bytes total Where nnnnnn is a six character2. Standard SDI 12 commands aC aV jal Send identification O Extended SDI 12 commands unique to the H 3123 16 WATERLOG 501 12 Command amp Response Protocol 2 Command amp Response Protocol Measure Command The Measure Command causes a measurement sequence to be performed Data values generated in response to this command are stored in the sensor s buffer for subsequent collection using D commands The data will be retained in the sensor until another M C or V command is executed Command Response Description aM atttn lt cr gt lt lf gt Initiate measurement Where a is the sensor address 0 9 2 a z 7 M is an upper case ASCII character ttt is a three digit integer 000 999 specifying the maximum time in seconds the sensor will take to complete the command and have measurement data available in its buffer n is a single digit integer 0 9 specifying the number of values that will be placed in the data buffer If n is zero 0 no data will be available using subsequent D commands Upon completion of the measurement a service request a lt cr gt lt If gt is sent to the data recorder indicating the sensor data is ready The data recorder may wake the sensor with a break and collect the data any time after the service request is received or the specified processing time has elapsed Example of a H 3123 aM command Command Response Time Values Description
3. aM a0044 lt cr gt lt If gt 4 sec 4 Make measurement Subsequent Command Response a tAA AAA BB BBB CC C DD D lt cr gt lt If gt Where AA AAA Stage feet inches meters etc BB BBB Pressure PSI CC C Temperature C DD D Sensor Supply Voltage Volts 17 SDI 12 COMMAND amp RESPONSE Measure Command with CRC The Measure Command causes a measurement sequence to be performed with a CRC appended to the data Data values generated in response to this command are stored the sensor s buffer for subsequent collection using D commands The data will be retained in the sensor until another M C or V command is executed Command Response Description aMC atttn lt cr gt lt lf gt Initiate measurement Where a is the sensor address 0 9 A Z a z MC are upper case ASCII characters ttt is a three digit integer 000 999 specifying the maximum time in seconds the sensor will take to complete the command and have measurement data available in its buffer n is a single digit integer 0 9 specifying the number of values that will be placed in the data buffer If n is zero 0 no data will be available using subsequent D commands Upon completion of the measurement a service request a lt cr gt lt lIf gt is sent to the data recorder indicating the sensor data is ready The data recorder may wake the sensor with a break and collect the data any tim
4. Acknowledge Command The Send Acknowledge Command returns a simple status response which includes the address of the sensor Any measurement data in the sensor s buffer is not disturbed Command Response gl a lt cr gt lt If gt Where a is the sensor address 0 9 2 a z Initiate Verify Command The Verify Command causes a verify sequence to be performed The result of this command is similar to the aM command except that the values generated are fixed test data and the results of diagnostic checksum tests The data generated in response to this command is placed in the sensor s buffer for subsequent collection using D commands The data will be retained in the sensor until another M C or V command is executed Command Response Description aV lt gt lt gt Initiate verify sequence Where a is the sensor address 0 9 A Z a z 12 V is an upper case ASCII character is a three digit integer 000 999 specifying the maximum time in seconds the sensor will take to complete the command and have data available in its buffer n is a single digit integer 0 9 specifying the number of values that will be placed in the data buffer If n is zero 0 no data will be available using subsequent D commands Example of a H 3123 aV command Command Response Time Values Description avr a0013 lt cr gt lt If gt 1 sec 3 Return fixed data
5. connections are also shown on a wiring diagram inside the dry air junction box If the polyurethane cable between the H 3123 sensor and the dry air junction box must be routed through a conduit or small hole the polyurethane cable can be temporarily disconnected from the dry air junction box as needed Reconnect the sensor cable as shown in the table on page 9 8 JUTICLUOT VVITITIC Data Logger Connections Red 1 2Volt DC SDI 12 Data Shield WATERL G instalation Wiring and Installation Precautions e The shield in the hook up cable must be connected H 3123 Sensor Connections to the data logger ground The data recorder must be earth grounded Red 412VoltDC e The H 3123 requires that the water be at ground SDI 12 Data potential Mother Nature takes care of this for surface and ground water Make certain the seals in the liquid tight cable fittings Shield on the dry air junction box are tight Make certain the dry air junction box lid is screwed on and sealed properly Make certain the vent port on the dry air junction box is not covered or blocked Make certain the end of the vent tube inside the dry air junction box is not plugged or blocked e Check the desiccant packs Replace if necessary Programming Your Data Recorder You must prepare your data recorder to receive and record the H 3123 data Since data recorders differ widely refer to your specific recorder manufacturer
6. maintenance issues PRESSURE SENSOR Water De oth n DATA LOGGER PIGTAIL The following chart shows the maximum depth to which the H 3123 is factory calibrated N The sensor can survive temporary operation DRY AIR JUNCTION up to twice the maximum rated depth for your model s range However any pressure a a measurements made beyond the rated depth NM will be inaccurate The H 3123 will be damaged if it is placed deeper than twice the maximum rated depth VENT PORT System Components Note Depth calculations are derived from the standard equation that one PSI is generated by a column of water 27 680 inches deep at 39 4 F Model Pressure Range Depth Range Accuracy H 3123 15 0 to 15 psi 0 to 34 60 ft 0 007 ft H 3123 30 0 to 30 psi 0 to 69 20 ft 0 014 ft General Installation Recommendations The sensor must be located in a no flow area Alterations in water flow can cause pressure variations Thus if the sensor is subjected to open flow changes your water level measurements will be inconsistent To obtain accurate and reliable data use stilling wells sand points or other no flow installation techniques The H 3123 submersible pressure transducer is not recommended for use in applications where silt and mud are problematic In addition if the sensor is used in a shallow water application with a chance to dry out with mud coating the sensor diaphragm the diaphragm compl
7. measurement sequence This setting determines how long the sensor will take to make a measurement MeanCount can be changed as described in Chapter 4 Setting the Stage Many applications use the pressure sensor in a stilling well The submerged sensor translates pressure to water level When the H 3123 is first installed you will want to adjust the Offset such that the SDI 12 measurement data Stage corresponds to the current water elevation or stage as determined with a staff gauge or other datum An extended SDI 12 command is convenient to quickly set the H 3123 s Stage reading to match the current water level The aXSCSdd d command causes the 3123 to make a fresh measurement and automatically update the Offset as needed to produce the desired Stage See Chapter 4 for details Example of a H 3123 Extended Set Current Stage Command Command Response Time Values Description aXSCS2 3 a0031 lt cr gt lt If gt 3sec 1 Set the Stage to 2 3 Subsequent Command Response Description a 12 80 lt cr gt lt If The new Offset Where Sensor Address 0 9 A Z a z e Testing Before installing the H 3123 in your field location you may wish to first test the sensor and data logger in your shop or lab This allows you to become familiar with H 3123 and the data logger in a controlled environment The 3123 can be tested a bucket of water However for this test to work correctl
8. the sensor s accuracy MECHANICAL POWER Size Housing 0 875 in max W x 6 5 in L 22 2 mm x 165 mm Material Housing 316 L stainless steel with polyure thane vent tubing Power Voltage Input 9 6 to 16 0 volts DC Requirements Current Standby 1 mA maximum Active 15 mA maximum Connector Cables 10 ft 3 048 m Cable H 3123 to junction box Polyurethane jacket vented shielded three wire cable Stainless steel cable not necessary UV vented cable sold separately General Cable Length Maximum 1000 ft 304 8 m Protection On board transient surge protection 1 5KVA SDI 12 Baud Rate 1200 Protocol SDI 12 V1 3 Response Time 4 second measurement sequence WarERL G SDI 12 Command amp Response Protocol ENVIRONMENTAL General Operating 0 to 40 C non freezing Temperature Compensated 0 to 40 C Temperature Storage 10 to 75 Temperatures MISCELLANEOUS Accessories H 3123 DAA Dry Air Assembly H 3123 MB Media Barriers H 3123 VC Vented Cable price per foot H 3123 H Vented Cable Mesh Grip Hanger H 306 Dry Air System Desiccant Pack 10 pack Warranty The WaterLOG H 3123 is warranted against defects in materials and workmanship for one year from date of shipment Note Specifications subject to change without prior notice due to ongoing commitment to product testing and improvement LR September 2014 D06 03 0914 29 Xylem 1 The tissue i
9. view the new slope or offset Command Response Description aXRS a0011 cr If Read StageSlope a0011 lt cr gt lt lf gt Read StageOffset axWSddd a0011 lt cr gt lt lf gt Write StageSlope aXWOddd a0011 cr If2 Write StageOffset Where a is the sensor address 0 9 A Z a z XRS are upper case characters XRO are upper case characters XWS are upper case characters XWO are upper case characters ddd is the new slope or offset value For example 20 0 195 Example of a H 3123 Extended Read Stage_Slope command Command Response Time Values Description aXRS a0011 lt cr gt lt lf gt 1 sec 1 Read StageSlope Command Response Description aDO a 1 00 lt cr gt lt lf gt StageSlope is 1 00 25 SDI 12 COMMAND amp RESPONSE Example of a H 3123 Extended Write Stage_Slope command Command Response Time Values Description aXWS1 234 a0011 lt cr gt lt lf gt 1 sec 1 Write StageSlope Command Response Description aDO a 1 234 lt cr gt lt lf gt StageSlope is 1 234 Extended Read Mean_Count and Write Mean_Count The H 3123 makes multiple raw sensor measurements discards the high and low values integrates averages the measurement data and computes Pressure PSI The number of raw sensor measurements made for each SDI 12 measurement sequence is programmable When measuring turbule
10. F SALE can be viewed at http www ysi com terms and conditions php WarTERL G introduction The WaterLOG H 3123 is a submersible pressure transducer specifically designed for water level monitoring The H 3123 is easy to use and works with any SDI 12 data recorder The Serial Digital Interface is ideal for data logging applications with the following requirements e Battery powered operation with minimal current drain Pressure measurement data is transmitted digitally over long cable lengths without error Multiple sensors on a simple three wire cable Up to 250 feet of cable between a sensor and the data recorder Use of H 423 SDI 12 to RS 485 converter extends the range to 1000 s of feet Key Features e Simple to install use and maintain no on site calibration required e Performs extremely accurate measurements Linear deviation is less than 0 0296 Resolution is 1 part in 1 000 000 Accuracy over temperature range exceeds 0 02 ft of water Enclosure is non conductive and corrosion proof e Stainless steel sensor diaphragm e Sensor cable has internal atmospheric vent for compensation of barometric pressure changes e Junction box provides access for inspection and maintenance of dry air desiccant ow current operation less than 500 microamps typical standby e Suspension bail provides positive control of the sensor depth independent of temperature and age dependent changes t
11. OWNERS MANUAL V2 0 WATERLOG H 3123 SUBMERSIBLE PRESSURE SENSOR WITH SDI 12 OUTPUT D66 0815 a xylem brand CONTENTS amp WARRANTY This user manual is a guide for the H 3301 3311 shaft encoder For more information updated manuals brochures technical notes and supporting software on the H 3301 H 3311 shaft encoder please refer to waterlog com or contact your sales representative For additional assistance please contact us at 1 435 753 2212 or sales waterlog com WaterLOG Warranty ete eee e e tede e oe e ore ite 1 Ch 1 1 seien 2 Wat Silty Ihe Boxen nassen nr Mike Eie OR ORE AR RENE d 3 Check The Sensor ee een 4 Check the Model Numb amp t eu cien see senden 4 Ch 2 Install tion ener oen editi tera 5 Water T P dee 6 General Installation Recommendations 6 Silence 7 Dry Air JUNCTION BOX iere nee 7 Making Connections to the H 3 12 8 Wiring and Installation 9 Programming Your Data Recorder ierit ettet ne 9 Programming The SDI 12 Address sse 9 Programming Ihe H 3123 Sensor eite itecto rh etti tk eed t 9 Setting the Stage ice eats andern nern 10 nen 10 Ch 3 Maintenance nocere ds Dose tee e ve Per Reus S 12 Cha
12. an also contribute to airflow within the vent tube If the vent tube is colder than the dew point of the air moisture will condensein the tube This condition occurs continually because the submerged portion of the vent tube is maintained at the water temperature INSTALLATION The temperature of both surface and ground water are normally well below the dew point of the surrounding air The H 3123 dry air junction box provides for terminating the polyurethane sensor cable and contains desiccant to keep the atmospheric vent tube dry The enclosure has a transparent lid which allows visual inspection of the desiccant packs The enclosure has a small screened vent port in the top cover which exposes the sensor vent tube to the atmosphere The dry air junction box should be installed in a protected dry location such as an instrument shelter The installation should provide easy access and facilitate regular inspection and maintenance of the desiccant The H 3123 is an SDI 12 V1 3 compliant sensor It connects directly to any data recorder with SDI 12 capability The dry air junction box has a 4 conductor pigtail cable for making connections to your data logger The pigtail cable can be modified or replaced for making connections to your data logger The pigtail cable can be modified or replaced in the field The table below shows the proper connections to the pigtail The power for the H 3123 is supplied by the SDI 12 12V input The
13. are upper case characters n is the number of raw measurements wanted This command takes 001 seconds to complete and places 1 value in the data buffer Use the command to collect and view the current value Example of a H 3123 Extended Read Mean Count command Command Response Time Values Description aXRMC a0011 lt cr gt lt lf gt 1 sec 1 Read Mean_Count Command Response Description abor at 16 lt cr gt lt lf gt Count 16 Example of a H 3123 Extended Write Stage_Slope command Command Response Time Values Description aXWMCS a0011 lt cr gt lt lf gt 1 sec 1 Write Mean_Count Command Response Description abor at 8 lt cr gt lt lf gt Count 8 Extended XTEST This command is used for installation or production testing and requires the use of a H 4191 Sidekick interface and a PC This command causes the H 3123 to transmit unsolicited real time data for testing purposes The test mode is used to help troubleshoot the installation by providing a continuous readout of pressure data This is not compliant with the SDI 12 specification and is not used with data loggers To activate the test mode send the command aXTEST from the PC The 3123 will enter the test mode and make continuous measurements The test mode is exited by sending a break or any new command on the SDI 12 bus It may take a few tries to exit if the command is sent at the same time
14. data is being sent from the H 3123 Removing power from the H 3123 also causes it to exit this mode Format SensorAdr Stage Pressure Temperature RawPressure counts RawTemperature counts 27 SDI 12 COMMAND amp RESPONSE XTEST displays the following data ooooo 1 202 43 222 23 0 12345 67890 1 212 3 232 23 0 12345 67890 1 222 3 342 23 0 12345 67890 1 232 3 352 23 0 12345 67890 1 232 3 352 23 0 12345 67890 etc 28 PERFORMANCE Accuracy Pressure Less than or equal to 0 02 of full scale output FSO over temperature range Pressure Less than 0 02 of FSO Hysteresis Linearity Less than 0 02 deviation Temperature Internal temperature 1 C over temperature range Long term Drift is less than 0 10 of FSO per Stability year Resolution Pressure 1 part in 1 000 000 0 0001 Temperature 1 part in 1 000 000 0 0001 Range PSI ranges 15 30 50 or 100 Pressure Depth Accuracy to 15 PSI 0 to 34 60 ft 0 007 ft 10 54 m 2 mm 0 to 30 PSI 0 to 69 20 ft 0 014 ft 21 m 4 mm General Pressure Less than 2 times the rated pressure Overload Media Liquids and gases compatible with Compatibility stainless steel and polyurethane Dry Air System Prevents moisture from condens ing in the submersible pressure transducer Provides compensation for changes in atmospheric pressure without impairing
15. e after the service request is received or the specified processing time has elapsed Example of a H 3123 aM command Command Response Time Values Description aM a0044 lt cr gt lt If gt 4 sec 4 Make measurement Subsequent Command Response at AA AAA BB BBB CC C DD DXXX lt cr gt lt If gt Where AA AAA Stage feet inches meters etc BB BBB Pressure PSI CC C Temperature C DD D Sensor Supply Voltage Volts XXX CRC ASCII Characters 18 WATERLOG 501 12 Command amp Response Protocol 2 Command amp Response Protocol Concurrent Measurement Command A concurrent measurement is one which occurs while other SDI 12 sensors on the bus are also taking measurements This command is similar to the aM command however the nn field has an extra digit and the sensor does not issue a service request when it has completed the measurement Communicating with other sensors will NOT abort a concurrent measurement Data values generated in response to this command are stored in the sensor s buffer for subsequent collection using D commands The data will be retained in the sensor until another M C or V command is executed Command Response Description aM a0044 cr lt Make measurement Where a is the sensor address 0 9 A Z a z x C is an upper case ASCII character is a three digit integer 000 999 specifying the maximum time in seconds the se
16. econds the sensor will take to complete the command and have measurement data available in its buffer nn is a two digit integer 00 99 specifying the number of values that will be placed in the data buffer If n is zero 0 no data will be available using subsequent D commands The data recorder may wake the sensor with a break and collectthe data anytime afterthe specified processing time has elapsed Example of a H 3123 aC command Command Response Time Values Description a0044 lt cr gt lt If gt 4 sec 4 Make measurement Subsequent Command Response at tAA AAA BB BBB CC C DD DXXX lt cr gt lt If gt Where AA AAA Stage feet inches meters etc BB BBB Pressure PSI CC C Temperature C DD D Sensor Supply Voltage Volts XXX CRC ASCII Characters Send Data Command The Send Data command returns sensor data generated as the result of previous aM aC or aV commands Values returned will be sent in 33 characters or less The sensor s data buffer will not be altered by this command 20 WATERLOG 501 12 Command amp Response Protocol 2 Command amp Response Protocol Command Response aDO through 9 apd d pd d lt cr gt lt lf gt Where a is the sensor address 0 9 A Z a z x m D0 D9 are upper case ASCII characters p Is a polarity sign or d d represents numberic digits before and or after the decimal A decimal ma
17. ement and automatically update the Offset b term as needed to produce the desired Stage Example of a H 3123 Extended Set Current Stage command Command Response Time Values Description aXSCS2 3 a0031 lt cr gt lt lf gt 3sec 1 Set the Stage to 2 3 Subsequent Command Response Description a 12 80 lt cr gt lt lf gt The new Offset 24 501 12 Command amp Response Protocol 2 Command amp Response Protocol Extended Read Write Stage_Offset and Read Write Stage_Slope The H 3123 processes the pressure sensor input and computes Pressure in PSI units Stage is computed with a Stage m Pressure b equation The Slope m and Offset b terms are programmable allowing the user to scale the reading into other engineering units These commands allow the user to read or write change the Stage_Slope and Stage_Offset terms The slope is set to 2 3067 and the offset to 0 00 at the factory With the factory default 2 3067 the Stage will be in units of water depth in feet The new values are stored in non volatile memory within the sensor Once the new Stage_Slope or Stage_Offset value is written to the memory a copy is sent to the sensor data buffer for verification This data can be viewed by using a subsequent D command To verify these settings any other time use the XRS or XRO commands This command takes 001 seconds to complete and places 1 value in the data buffer Use the aDO0 command to collect and
18. iance will be altered and the factory calibration spoiled The H 3123 sensor will be permanently damaged if it is frozen Transducers which are installed in geographical areas with harsh winters should be removed for the winter unless they are installed deep enough in the water with no danger of freezing Ice may form around the sensor cable without causing damage or performance degradation However the cable should be protected to minimize the possibility of incurring damage as the ice shifts or breaks up during times of thawing 6 WATERLOG instalation The polyurethane drop cable is suitable for immersion direct burial and is somewhat ultraviolet UV resistant Whenever possible precautions should be taken to protect the cable from direct sunlight rodents and mechanical damage Experience has shown that if a portion of the H 3123 housing or the sensor cable is installed above the water and exposed to sunlight e g installed in shallow water a temperature gradient can occur inside the enclosure and venttube As the air temperature changes the air density changes A change in the air density inside the sensor or vent tube column causes a partial pressure on the reference side of the sensor which will raise or lower the H 3123s pressure reading This is a law of physics problem not unique to WaterLOG Series transducers It can be avoided by installing the transducer in a horizontal position to ensure the entire enclosure is covered b
19. is between 10 0 to 16 0 Volts 3 Check the connections between your data recorder and the H3123 sensor Offset Drift Check the desiccant packs If moisture accumulates in or blocks the vent tube changes in barometric pressure will affect the pressure measurement If this is the case you should contact WaterLOG technical support for instructions as how to proceed 13 No SDI 12 response or intermittent data 04 SDI 1 I RESPONSE PROTOCOL 501 12 Command amp Response Protocol 2 Command amp Response Protocol This is a brief description of the Serial Digital Interface SDI 12 Command and Response Protocol used by the WaterLOG Series Model H 3123 sensor Included is a description of the commands and data format supported by the H 3123 Refer to the document A SERIAL DIGITALINTERFACE STANDARD FOR HYDROLOGIC AND ENVIRONMENTAL SENSORS Version 1 3 january 12 2009 Coordinated by the SDI 12 Support Group 135 East Center Logan Utah During normal communication the data recorder sends an address together with a command to the H 3123 SDI 12 sensor The H 3123 then replies with a response In the following descriptions SDI 12 commands and responses are enclosed in quotes The SDI 12 address and the command response terminators are defined as follows a Is the sensor address The following ASCII Characters are valid addresses 0 9 A Z a z 2 Sensors will be initially
20. n plants that brings water upward from the roots 2 a leading global water technology company We re 12 000 people unified in a common purpose creating innovative solutions to meet our world s water needs Developing new technologies that will improve the way water is used conserved and re used in the future is central to our work We move treat analyze and return water to the environment and we help people use water efficiently in their homes buildings factories and farms In more than 150 countries we have strong long standing relationships with customers who know us for our powerful combination of leading product brands and applications expertise backed by a legacy of innovation For more information on how Xylem can help you go to www xyleminc com xylem Let s Solve Water YSI Incorporated 1700 1725 Brannum Lane Yellow Springs Ohio 45387 USA Request a Quote Tel 1 435 753 2212 a xylem brand Email sales waterlog com Internet www waterlog com Place an Order Tel 1 937 767 7241 Email orders ysi com Customer Support Tel 1 937 767 2772
21. nsor will take to complete the command and have measurement data available in its buffer nn is a two digit integer 00 99 specifying the number of values that will be placed in the data buffer If n is zero 0 no data will be available using subsequent D commands The data recorder may wake the sensor with a break and collect the data anytime after the specified processing time has elapsed Example of a H 3123 aC command Command Response Time Values Description aC a0044 lt cr gt lt If gt 4 sec 4 Make measurement Subsequent Command Response aDO atAA AAA BB BBB CC C DD D lt cr gt lt If gt Where AA AAA Stage feet inches meters etc BB BBB Pressure PSI CC C Temperature C DD D Sensor Supply Voltage Volts 19 SDI 12 COMMAND amp RESPONSE Concurrent Measurement Command with CRC A Concurrent Measure with CRC Command causes a measurement sequence to be performed with a CRC appended to the data Data values generated in response to this command are stored in the sensor s buffer for subsequent collection using D commands The data will be retained in the sensor until another M C or V command is executed Command Response Description atttnn lt cr gt lt lf gt Initiate measurement Where a is the sensor address 0 9 A Z a z 12 is an upper case ASCII character ttt is a three digit integer 000 999 specifying the maximum time in s
22. nt unless otherwise specified in the corresponding YSI pricelist or product manual WaterLOG products not manufactured but that are re sold by YSI are warranted only to the limits extended by the original manufacturer Batteries desiccant and other consumables have no warranty YSI s obligation under this warranty is limited to repairing or replacing YSl s option defective products which shall be the sole and exclusive remedy under this warranty The customer shall assume all costs of removing reinstalling and shipping defective products to YSI YSI will return such products by surface carrier prepaid within the continental United States of America To all other locations YSI will return such products best way CIP Port of Entry INCOTERM 2010 prepaid This warranty shall not apply to any products which have been subjected to modification misuse neglect improper service accidents of nature or shipping damage This warranty is in lieu of all other warranties expressed or implied The warranty for installation services performed by YSI such as programming to customer specifications electrical connections to products manufactured by YSI and product specific training is part of YSI s product warranty YSI EXPRESSLY DISCLAIMS AND EXCLUDES ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE YSI is not liable for any special indirect incidental and or consequential damages A complete TERMS AND CONDITIONS O
23. nt water tides or other special applications Mean_Count can be changed to increase or decrease the number of pressure measurements made during the SDI 12 measurement sequence The H 3123 makes 7 1 2 pressure measurements per second 133ms measurement The ttt field in the SDI 12 sensor response is computer by the H 3123 and indicates how much time the H 3123 will require to complete the measurement sequence The ttt field will automatically change if Mean_Count is changed The H 3123 comes from the factory with Mean_Count set to 16 The factory default ttt field is computed internally by the H 3123 as follows Raw Measurements 2 13 sec 0 133 sec measurement X 16 measurements Math Overhead 40 3 sec Round Upwards 1 0 ttt 3 0 Seconds The aXRMC and aXWMC extended commands allow the number of raw sensor measurements for each SDI 12 measurement sequence to be monitored or changed Once a new Mean_Count value is written a copy is sent to the sensor data buffer for verification This data can be viewed by using a subsequent D command To read or verify the value any other time use the XRMC command Command Response Description aXRMC 30011 cr If Read Mean Count aXWMCn a0011 cr If Write Mean Count Where a is the sensor address 0 9 2 a z XRMC are upper case characters 26 WATERLOG 501 12 Command amp Response Protocol 2 Command amp Response Protocol XWMC
24. o the sensor cable e Extended SDI 12 commands for setting the Stage to the current water elevation What s In The Box 2 1 WaterLOG 3123 pressure transducer with polyurethane vented cable and dry air junction box 3 Spare desiccant packs 1 Owner s Manual INTRODUCTION Check The Sensor Cable Be sure that the vented cable is long enough to reach from the submerged location to the junction box of the dry air system Also be sure that the data logger cable is long enough to reach from the dry air junction box to your data recorder Check The Model Number Before installing your new WaterLOG H 3123 check the information on the label of the sensor enclosure Check the model number the range and the output type to be sure that you have received the instrument you ordered The label will look similar to the following Submersible Pressure Sensor S N 1103 Range 0 15 PSI 34 6 H20 Output SDI 12 Input 10 to 16 0 Volts Contains No User Serviceable Parts This example shows that the waterLOG H 3123 15 measures pressure within the range from zero to 15 psi This model works with a recording device that follows the SDI 12 protocol INSTALLATION The H 3123 submersible pressure sensor is very versatile and can be used in many water ws PRESSURE INLET monitoring applications Before proceeding with the installation please consider several site preparation and
25. ondition in your particular installation The desiccant packs contain indicating silica gel and have a transparent window that allows the condition of the desiccant to be observed The silica gel has a blue color when dry and changes to pink as it absorbs moisture Changing the Desiccant To change desiccant in the H 3123 junction box dry air system Step 1 Remove the clear plastic lid Step 2 Replace the desiccant packs Step 3 Reinstall the clear plastic lid Precautions Make certain the seals in the liquid tight cable fittings on the dry air junction box are tight Make certain the dry air junction box lid is screwed on and sealed properly ee ere Maintaining Desiccant Packs AN SCHR BOX The desiccant bags have a transparent strip which allows the condition of the desiccant to be visually checked The desiccant has a dark blue color when dry and changes to pink as it absorbs moisture The desiccant packs can be reused by drying them in an oven at 180 F to 220 F for 4 to 8 hours or until the desiccant returns to a dark blue color Trouble Shooting Experience over the years with submersible sensors has identified several common problems 1 Check all wiring including power and ground connections Battery connections can become corroded over time 2 The H 3123 measures and reports it s internal power supply Red 1 12VokDC voltage along with Stage and Pressure Make a measurement and check to see if the coltage
26. programmed at the factory with the address of 0 for use in single sensor systems Addresses 1 to 9 and Ato Z or a to z can be used for additional sensors connected to the same SDI 12 bus Address and are wild card addresses which select any sensor regardless of its actual address Is the last character of a command block j lt er gt lt lf gt Are carriage return OD hex and line feed 0A hex characters They are the last two characters of a response block Notes e All commands responses are upper case printable ASCII characters e Commands must be terminated with a character e Responses are terminated with cr If characters e The command string must be transmitted in a contiguous block with no gaps of more than 1 66 milliseconds between characters To enhance the error detection capability in SDI 12 data collection systems a variation of the Start Measurement Commands M M1 M9 Start Concurrent Measurement Commands C C11 C9 and Continuous Measurement Commands aRO aR9 request that the data be returned with a 16 bit Cyclic Redundancy Check CRC appended to it These commands use the existing command letters with a C appended namely aMC aMC1 aMC9 aCC aCC1 aCC9 and aRC9 When these commands are used the data returned in response to the D commands or R commands have a CRC code appended to it 15 SDI 12 COMMAND amp RESPONSE SDI 12 Master Command List
27. riging The DesiCcaht on eise ttti cte eee IE Hehe der turc qd 13 ir re fefe M 13 Maintaining Desiccarit Packs sen ea eis 13 Trouble een ea 13 Ch 4 SDI 12 Command amp Response 14 501 12 Master Command List surres E A eee entente tnter ns 16 Measure Command ran et m tiet ise ueteris bos e o aea 17 Measure Command with CRC arena 18 Concurrent Measurement Command sss 19 Concurrent Measurement Command with 19 Send Data Command er nase een ren ie io eins datas Betas 20 Continuous Measurements nentes 21 Continuous Measurements with CRC sss 21 Send Acknowledge Command seen 22 Initiate Verity Command kassel 22 Send Identification Commnmamnd ct entere ee oeste ite eden 23 Change Sensor Address Command sse 24 Extended Set Current Stage Command sse 24 Extended Read Write Stage Offset and Read Write Stage Slope 25 Extended Read Mean Count and Write Mean Count 26 Extended XI EST e een tess 27 Contents Warranty amp Warranty WATERLOG PRODUCTS MANUFACTURED BY YELLOW SPRINGS INSTRUMENTS CO INC are warranted by Yellow Springs Instruments Co Inc YSI to be free from defects in materials and workmanship under normal use and service for twelve 12 months from date of shipme
28. s directions In general program the data recorder to input four values via the SDI 12 port Usually only one or two of the parameters is actually recorded Your data recorder must issue an aM command then collect the data with a 0 command as explained in Chapter 4 The H 3123 places four parameters in its data buffer a AA AAA BB BBB CC C DD D lt cr gt lt If gt Where a SDI 12 address 0 9 A Z AA AAA Stage feet inches meters etc BB BBB Pressure PSI CC C Temperature C DD D Sensor Supply Voltage Volts Programming The SDI 12 Address If more than one sensor is to be connected to the SDI 12 bus make certain each sensor has a different address The 3123 comes from the factory with its address set to 0 The address can be changed with an extended SDI 12 command see Chapter 4 Programming The H 3123 Sensor The H 3123 comes from the factory with the following settings SDI Address 0 Slope 2 3067 feet of H50 9 INSTALLATION Offset 0 00 MeanCount 16 With these values the Stage will be in units of feet when used in clean water The slope can be changed to accommodate other engineering units such as inches or meters The setups are stored in Flash memory within the H 3123 and will not be lost if the power is disconnected The extended commands for changing these setups are described in detail in Chapter 4 MeanCount isthe number of raw pressure measurements averaged together to make one 501 12
29. sensor serial number hhh is a three digit sensor firmwater revision level 23 SDI 12 COMMAND amp RESPONSE Change Sensor Address Command The Change Sensor Address Command allows the sensor address to be changed The address is stored in non volatile flash memory within the sensor The H 3123 will not respond if the command was invalid the address was out of range or the flash programming operation failed Command Response Description aAn n lt cr gt lt lf gt Change sensor address Where a is the current old sensor address 0 9 A Z a z An ASCII may be used as a wild card address if the current address is unknown and only one sensor is connected to the bus A is an upper case ASCII character n is the new sensor address to be programmed 0 9 A Z NOTE To verify the new address use the Identify Command Example of an Change Sensor Address command Command Response Description aA2 2 lt cr gt lt lf gt Change sensor address to 2 Extended Set_Current_Stage Command The H 3123 processes the pressure sensor input and computes Pressure in PSI units Stage is computed with a Stage m Pressure b equation During installation it is convenient to quickly set the H 3123 s Stage reading to match the current stage or elevation of the water as determined by a staff gauge or other datum This command causes the H 3123 to make a fresh measur
30. y you must run a wire from the water inside the bucket to the chassis ground of the data recorder The wire establishes a ground connection between the water and the data logger Water and other conductive objects isolated by a plastic bucket or table surface pick up AC noise from nearby lighting and power lines The AC noise is coupled by the water to the stainless diaphragm in the submerged pressure sensor While the H 3123 has a conductive 10 WATERL G instalation housing it is electrically isolated from the rest of the circuitry to prevent galvanic corrosion from occurring This makes it so the circuitry is also isolated from the surrounding water The AC noise may affect the pressure measurement due to large voltages between the water media and the sensor data logger ground This precaution is not necessary for field installations because surface water and ground water are not isolated from earth ground 11 103 MAINTENANCE Maintenance Sustained operation of the H 3123 pressure sensor is almost maintenance free Experience has shown that moisture condensing in the atmospheric reference tube creates the largest percentage of field problems The desiccant in the H 3123 junction box dry air system should be changed on a fixed schedule normally every three to six months Different areas in the world have widely varying humidity and temperature fluctuations Pay close attention to the desiccant c
31. y be used in any position in the value after the polarity sign If a decimal is not used it will be assumed to be after the last digit For example 3 29 23 5 25 45 300 If one or more values were specified and a aDO returns no data lt CR gt lt LF gt only it means that the measurement was aborted and a new M command must be sent Example of a H 3123 aD0 command Previous Command Response aM a0044 lt cr gt lt If gt Subsequent Command Response a tAA AAA BB BBB CC C DD D lt cr gt lt If gt Where AA AAA Stage feet inches meters etc BB BBB Pressure PSI CC C Temperature C DD D Sensor Supply Voltage Volts Continuous Measurements Sensors that are able to continuously montior the phenomena to be measured such as a cable position do not require a start measurement command They can be read directly with the R commands RO R9 The R commands work exactly like the D DO D9 commands The only difference is that the R commands do not need to be preceded with an M command The H 3123 does not support the aRO continuous measurement command because the measurement and math operations require several seconds to complete Continuous Measurements with CRC The H 3123 does not support the aRCO continuous measurement command because the measurement and math operations require several seconds to complete 21 SDI 12 COMMAND amp RESPONSE Send
32. y water Protect the sensor cable so it remains at the temperature of the surrounding air and is not heated directly by the sun Stilling Wells The H 3123 can be hung in well bores stilling wells and stand pipes and can be installed by suspending the sensor using its polyurethane electrical cable When installing the H 3123 in wells or stand pipes make certain the surface of the water in the pipe is open to the atmosphere Well pipes are often capped with a sanitary well seal or locking cap Make certain the well cap has a suitable hole or screened vent Dry Air Junction Box The surface of the water being measured is exposed to atmospheric pressure therefore submersible pressure sensors must provide correction for changes in barometric air pressure Several industry designs employ a sealed sensor housing and measure the atmospheric pressure separately This sheme however doubles the offset drift because two pressure sensors are needed To provide the Vertical Position 3123 best accuracy possible the H 3123 uses an atmospheric referenced pressure sensor design The pressure sensor in the H 3123 has an internal vent tube to compensate for the atmospheric pressure changes This vent tube passes up the drop cable and is open to the atmosphere at the top Vent tube designs however are susceptible to moisture condensation in the tube As the atmospheric pressure changes small amounts of air flow up and down the vent tube Convection c
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