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1. 52 8 2 RG 30 MEASUREMENT 52 8 2 1 Measurement Values 5 52 8 2 2 Special Values 54 6 2 3 Analysis Values sa eene ta e i P CR OR RR HER EDU EO DEP Ua On us sni 54 8 3 PARAMETERIZATION WITH INTERFACE COMMANDS 6000 55 8 3 1 55 8 3 2 UB BU AE PIETER E PERRA AERE RERUMS ERE ON 56 8 4 SOMMER Gin Gu EU 58 8 5 FACTORY DEFAULT PARAMETER SETTINGS eee eene 61 8 6 IF YOU HAVE PROBLEMS YOU CAN NOT SOLVE 62 1 Specifications Specifications are subject to change without notice 1 1 General supply voltage 5 5 30 VDC Reverse voltage protection overvoltage protection supply current Sleep mode 1 mA at 12 VDC Measurement approximately 130 mA operating temperature 35 C to 60 31 f to 140 F storage temperature 40 C to 60 40 f to 140 F protection rating IP 68 lightning protection Integrated protection against indirect lightning with discharge capacity 0 6 kW Ppp 1 2 Velocity Measu
2. 35 6 Analogue Output only RG 30a Beside the digital outputs the RG 30a includes also an analogue output of 4 20 mA blue red wire IOUT 3 the other IOUT output wires are not active in this device version The output current is during operation between 4 mA and 20 mA It is dependent linearly from the measured velocity The maximum velocity which is expressed by the current value of 20 mA is adjustable over the menu item OUT3 Max velocity Fig 31 4 20 m output IOUTS 1 Status z B IOUT3 Max velocity 10 m s C Simulate current output Fig 31 The menu Technics gt 4 20 mA output IOUT3 If only one direction is allowed Main Menu gt Possible flow directions gt just downstream then the analogue output current of 4 mA represents a velocity of zero no movement Fig 32 a If both velocity directions are allowed Main Menu gt Possible flow directions gt two tide then the analogue output at IOUTS is 12 mA for a velocity of zero and 4 mA for the negative of the adjusted Max velocity a just downstream b two tide IOUT 3 IOUT 3 20 20mA4 12 mA SEE 4mA 4mA velocity t gt velocity 0 Max velocity Negative 0 Max velocity max velocity Fig 32 The relation between output current at IOUT3 measured velocity and adjusted Max velocity left a the relation with just downstream as adjusted parameter a
3. Example HW 01 mt 7 1 2 1 Wake up If the serial interface receives data during sleep mode it is possible that the first characters are lost To prevent this two possibilities are suggested Sync combination The denomination Sync is used here for the string which is sent directly before a sensor command The intention is to synchronize the receiving interface which controls the data processing At interfaces with very fast wake up times the Sync can be also sufficient for a wake up if directly sent before a command For an example application refer to Ch 7 1 3 1 Prefix A Prefix is here the denomination for sending any character and then waiting until the receiving interface is awake This wake up time is normally in the order of 1 ms max 300 ms 38 7 1 2 2 Full list of commands Complete data request The complete data includes all the measurement values and optional the analysis values in the parameterized protocol format for protocol reference refer to 7 1 4 Output protocols Start complete measurement command Command string Answer CRC only valid for system key 00 and a device number 01 itWooo1 mt 5 001 AFA9 500019 7F43 none The start sequence W causes the answer A9 010k mt AFA9 4FAQ is the variable CRC the start sequence S has no answer After the start sequence the radar device is identif
4. direction relation CSR area of the peak RMS at the PIC analysis amplification values amplification balance signal balance error code no meaning no meaning no meaning Tab 12 30 commands and according value output list for triggering the measurements over the SDI 12 bus depend on the settings in Technics positions can change according to the W v priority parameter Example communication with a RQ 30 with the address 0 using the aM command The logger sends the Start Measurement Command here the RQ 30 has the preset address 0 CR LF The RQ 30 answers following 00008 CR LF where the first digit is its address the next three digits are for the measurement duration in sec and the last digit is for the number of measurement values Note that because the measurement duration is zero the RQ 30 does not send a service request and the logger can then immediately send the Send Data Command ODO CR LF The RQ 30 answers with its address and the first measurement values not more than 35 characters 0 999999 8 9999998 0 683 3 02 lt CR gt lt LF gt Then to put out the rest of the values the commands aD1 and aD2 are used 50 D1 lt CR gt lt LF gt 0 99999 98 99999 98 9999 998 lt CR gt lt LF gt D2 lt CR gt lt LF gt 0499999 98 CR LF 51 8 Appendix 8 1 Error Codes If you re
5. 5 MESS SYSTEMTECHNIK RG 30 RG 30a firmware version 1 5x Velocity Measurement System User Manual Edition Jan 2012 Sommer Measurement System Technology All rights reserved The Copyrights for this manual are exclusively at the company Sommer GmbH amp Co KG A 6842 Koblach This manual may only be multiplied or passed on third parties with written permission of the company Sommer This applies also if only excerpts of this manual are copied or passed on The same conditions exist for the passing on in digital form The manufacturer reserves also the right to make changes in this manual and at the product it describes at any time without notice or obligation MESS SYSTEMTECHNIK Sommer GmbH amp Co KG StraBenhauser 27 6842 Koblach Austria http www sommer at Email office sommer at Telephone 43 5523 55 989 0 Fax 43 5523 55 989 19 Validity of this manual This manual applies to the velocity measurement systems RG 30 and RG 30a where the version RG 30a is the same as RG 30 but additionally with an analogue input From here on with the denomination RG 30 both versions RG 30 and RG 30a are meant The manual applies to the firmware version 1_5x where x stands for any string You can find the version of the RG 30 operation system firmware under Main Menu gt Special functions gt About device more information in Ch 5 Description of the parameters Another possibility to
6. Measurement trigger interval Measurement interval Velocity Technics Special functions Choice M for exit Connected 00 01 48 Auto detect 96008 1 Fig 15 The Main menu shown using a terminal program If you want that the device starts the measurements automatically and maybe have problems to find the right adjustments then check the following settings Measurement trigger gt interval Measurement interval gt Velocity gt Measurement type gt continuous RS 485 protocol gt Measurement output MO time gt after measurement If you still have no answer then it is suggested to reset the adjustments of the RG 30 temporarily to factory settings Special functions gt Temp load factory default So you can see that the device outputs measurement results with the factory settings gt more about this function on p 35 4 2 Adjusting the RG 30 parameters using RQCommander light Adjusting the interface parameters For adjustments according to the factory adjustments refer to Fig 16 upper right corner The adjusted Com Port is dependent on the interface you have chosen at your computer Loading the parameter scheme The software RQCommander light is programmed in that way that different devices beside the RG 30 can be evaluated To tell the program which parameter from the connected device in this case the RG 30 can be changed a parameter scheme Schema must be loaded prior to that Fir
7. Then with the continuous adjustment a the RG 30 needs 23 s from begin of the measurement until the result is available With the sequenced adjustment b the RG 30 needs 66 s from begin of the measurement until the result is available Gu P sequenced continuous time from begin of the measurement until it is available s X 0 0 50 100 150 200 adjusted measurement time s Fig 21 Comparison of the timespan from begin of the measurement until the result is available using the sequenced and the continuous adjustment 4 Minimal requirement of SNR The parameter sets a SNR signal to noise ratio as a lower limit for valid velocity measurements If the measurement has a lower SNR than the minimal requirement then the velocity value is set to zero This is because very low SNR values mostly occur during situations where the velocities are below the measurable limit value The utilization of a minimal requirement of SNR is for example recommended at measure stations for the discharge at tide stations Zero velocity values which are caused by the SNR limit do not influence the results of the average calculation in the optional applied filters Main menu gt Velocity gt Filter type Unit Value range 0102000 default 0 Special value 0 SNR limit off 24 Under extreme inappropriate co
8. 19 CRC 16 Table 58 The CRC 16 value is calculated stepwise character by character When the CRC of the complete string is calculated it is added at the ending of the string and finished with a semicolon When calculating the CRC of an existing string the calculation of the CRC is stopped at the fifth character before the ending semicolon right before the CRC The calculated CRC then is compared to the sent one If they are indent the string was sent correctly The start value for the initial Crc16 calculation is always 0 The Crc16 of a single character c is calculated according to the following method Parameter Remark byte1 Crc16 right shift 8 bits upper byte vanishes uinti new character upper byte 0 uint2 Crc16 left shift 8 bits lower byte 0 uint3 crc16tab byte1 value from CRC 16 table Crc16 uint3 excl Or uint2 excl Or uint1 Fig 37 CRC 16 calculation Or expressed in C programming language Crc16 crc16tab unsigned 16 8 Crc16 8 unsigned int c 59 Example string with CRC 16 M0001GO00se00 9 15 01 1 075 02 1 347 03 8 91 04 1 61 0599999 98 3FF7 The first character is the last character for the CRC calculation is the separator The CRC 16 of the string is 8FF7 The end sequence is 5 The CRC 16 is performed successive with start value 0 for the initial CRC 16 calculatio
9. A MIO protocol and check sum compatible to RQ 24 4 5 Compat RQ 24 MIO protocol and CRC 16 compatible to RQ 24 Compat RQ 24 C Standard protocol compatible to RQ 24 28 D G D Measurement Output MO time The measurement outputs are triggered by different events They can be requested by RS 485 and SDI 12 commands They can be output right after every measurement independent how the measurement was triggered Finally they can also be triggered by the TRIG input Values 1 justpercommand Outputs are only requested by commands default2 2 after measurement Outputs are transmitted after every measurement os TRIG slope Outputs are triggered by the TRIG input Application example If pos TRIG slope is chosen and also in Main menu gt Measurement trigger the option TRIG input is chosen then at the rising flank of a trigger signal two processes are triggered at the same time start of a new measurement trigger of the output of the measurement before D G E MO information Measurement values are always included in measurement outputs requested by commands sent after measurements or triggered by the TRIG input Additionally analysis values gt 8 2 3 Analysis Values of the velocity measurement can be added to these outputs Values 1 values Measurement output includes measurement values only default 2 2 special values Meas
10. If simultaneous measurements shall be run by several sensors it is necessary to use the aC command for starting these measurements according to the SDI 12 specification The command for reading a measurement is aDn The maximum number of characters that can be returned in the values part of the response to a aDn command is either 35 or 75 If the command is issued to retrieve data in response to a concurrent measurement command the maximum is 75 Otherwise the maximum is 35 Note that caused by this SDI 12 standard it is not possible to list the assignments to the nDO nD1 strings exactly for all value indices in opposite to the aRn command But the order follows the measurement list in chapter gt 8 2 The predefined measurement positions are defined according to Tab 11 Note that according to the SDI 12 standard only one digit is reserved in the response to the Start Measurement Command aM so e g for aM1 the answer indicates the number of 9 values although 20 values are available With the command however the number of available values in its answer is correct 49 SDI 12 command aMO aM2 aM3 4 aC 0 aC2 aC3 aC4 AUX water level velocity quality water discharge discharge sum special learned velocity results learned discharge peak width 1 2 3 4 5 6 7 2 1 2 3 4 5 7 8 o 410 1 10
11. duration has a high influence on the energy consumption Unit S Value range 5 to 240 default 20 A single velocity measurement can be performed compact in one block or it can be sequenced in multiple blocks with randomly distributed breaks between the blocks The continuous measurement has the advantage that it is faster The sequenced adjustment has the advantage that more representative measurement results are generated in comparison to the continuous measurement with same adjusted measurement time This advantage especially takes into account if the water velocity has a very high variability over time For more representative measurements with the continuous adjustment it would be also possible to simply increase the measurement time but that would increase the power consumption So in other words same power consumption but higher representativeness is the advantage of the sequenced measurement Values 1 5 Velocity is measured in one block default 1 2 sequenced Velocity is measured in 5 blocks with randomly distributed breaks An example for an adjusted measurement time of 20 s is shown in Fig 20 8 continuous measurement active for 20 s processing time is always 3s b sequenced 23 measurements are in sumfor 20 s active processing time is always 3s time randomly distributed breaks Fig 20 Adjusted measurement time is 20s for example
12. in three strings followed by the string number The string number allows an automatic distinction between measurement and analysis strings Finally the command is added The string se identifies automatically sent strings 42 Parameter Format start sequence System key DD 2 digits device number DD 2 digits command ID 1 capital letter group index DD 2 digits command cc 2 lower case letters example MBO 1 6 Tab 2 Sommer Protocol header Measurement values Subsequently the measurement values are output Tab 3 Group sending for example always includes six measurement values The values are identified by the value index corresponding to the measurement list gt 8 2 RG 30 measurement list The value index consists of 2 digits The value has a length of 8 characters For the number 7 digits are reserved If the number uses a decimal separator like a point or comma then there is no remaining blank between index and value Parameter Format value index DD 2 digits value FFEFFEFF 8 float characters not significant places are replaced by blanks separator 00 9 15 3 Data value output in the Sommer Protocol The character as a decimal separator and number of significant places after the decimal separator are defined in the Technics menu The value is right justified and the remaining c
13. logger 20 value range 1 2 18000 measurement interval in seconds value for special function Continuous measurement and output default 20 in any case a complete measuring cycle is completed before the next one starts continuously without any break eo The Velocity menu includes measurement site dependant information for the velocity measurement The measurement itself is controlled by the parameters in the technical menu E Velocity v m A Viewing direction upsteem B Possible flow directions iust downstream 7 m River inclination D Pivot angle 0 4 deg E Maximum velocity m s F River type 4 Measurement time H Measurement type continuous Minimal requirement of SNR m J Filter no of values i K Filter type moving average Fig 19 Overview of the parameters in the Velocity menu showing the default adjustments The radar device can either be pointed in the upward or downward direction of a flowing river In general the upstream pointing installation is recommended as no influences from installation buildings should be present and rain fall has less influence alues 1 Downstream Sensor is looking downstream efault 2 2 Upstream Sensor is looking upstream In common only on flow direction is present at a station Especially in lo
14. standard way are described for using a terminal program Note that you are also free to program the parameterisation with commands according to Ch 7 1 2 for RS 485 and Ch 7 2 1 for SDI 12 interface 4 1 Adjusting the RG 30 parameters using a terminal program Until Windows XP the terminal program HyperTerminal was included in the Windows Operating Systems under Start gt Programs gt Accessories gt Communications gt HyperTerminal With a terminal program like HyperTerminal or any other terminal program you have full control over the parameterization of your RG 30 Furthermore it is possible to use the professional software RQCommander light which was developed by Sommer Measurement System Technology With this optional available Windows program you can additionally e g depict spectral velocity distributions and have more comfort adjusting the parameters e g the possibility to save different parameter profiles on your computer The parameterization using this program is described after this chapter First for any terminal program the interface options must be adjusted Fig 14 Then after the rapid entry of three question marks at the prompt within the terminal program like HyperTerminal the main menu opens Fig 15 Please consider that if the sensor is just in sleep mode it is possible that the 3 question marks have to be repeated a second time to enter the main menu If you want to change parameters you can enter th
15. 1 3 WARES MEN 2 1 4 HOUSINGE SS eneint eom rM e meat Snes Sete Mate 5 UAE card 4 MEASUREMENT PRINCIPLE edes oo eo taco io a 5 PEACEMENT AND INSTALLA TION esis iiec eene sees ve eroe eese bo inset rodeo Toe erra aaa 6 3 1 SELECTION OF THE MEASUREMENT 6 E EE EEEE E ese ese ese e 6 3 2 MEASUREMENT SPOT OF TH SENSOR 2s 7 3 3 INSTALLATION POSSIBILITIES 8 3 4 5 390 02 8 3 4 1 Parameterisation with a connected computer eese eene 9 3 4 2 Data logging parameterization e putetis thee ea deno 10 3 4 3 Data logging at the analogue output only 30 12 SETTING UP OPERATION USING COMPUTER 13 4 1 ADJUSTING THE RG 30 PARAMETERS USING A TERMINAL 000 13 4 2 ADJUSTING THE RG 30 PARAMETERS USIN
16. 18 and its parameters can be determined in this order A description of all the parameters is found in 5 Description of the parameters After terminating the menu the sensor initializes itself After that if the RG 30 has appropriate or the preset factory settings then the sensor automatically starts the measure process 17 RQCommander light es ame File Mode View Options Help fi E Spectrum Parameter Terminal Sensor Parameter Information Sensor Parameter Connection E Filename Main men Com Port COM4 Description 7 Baud Rate 9600 A Measurement trigger interval ES Device Type 20 RTS CTS Handshake Setup Type 2 01 03 LUSIT USE GS B p Xon Xoff a 3 Configuration 1 5 C Velocity File Name Code 0000 3 ral gt Technics Terminal E Special functions Ol m Sensor Parameter Jobs a 5 Open Parameter File oo Save Parameter File NNNNNNNNN gt H Load Parameter Send All Parameter Send Modified Parameter Load Schema 17 Save Schema File Fig 17 Display after successful Schema load process If you want that the device starts the measurements automatically and maybe have problems to find the right a
17. 2 RG 30 measurement list Command Answer CRC only valid for system key 00 and a device number of 01 request quality HROO01 030cv 8402 tA00010k 030cv6 92 57 The answer of the RG 30 is identified with the sequence the radar device identification An ok is added for correct request handling and the send command is displayed The value has a length of 8 characters is left justified and filled with blanks on the level The string is completed with the separator the CRC 16 and the end sequence Carriage Return and Line Feed 7 1 3 Summary and trouble shooting If you have problems with the programing over the RS 485 interface consider the following advices 7 1 3 1 Prevent problems with wake The interface of the logger in some cases dependent on the logger device as well as the interface of the RG 30 can need a wake up before it can process the incoming commands because interface processors usually go into sleep mode during idle If you have problems receiving information from the RG 30 The interface of the logger probably needs a wake up before receiving information from the RG 30 It is recommended that you set the parameter Technics gt RS 485 protocol gt wake up sequences to on If you have problems that the RG 30 understands the commands from your logger or PC With sending of the Sync string the RG 30 can synchronize on the transmitted commands It dep
18. 3 Dimensions in mm of the RG 30 housing 2 Measurement principle The RG 30 radar sensor measures the flow velocity at stations also where conventional methods cannot be used The measurement values are output via interface RS 485 or SDI In case of the RG 30a version the flow velocity can also be output as an analogous current signal of 4 to 20 mA This allows a simple adoption into different measurement systems Flow Velocity The measurement of the flow velocity is based on the principle of the frequency shift due to the Doppler Effect The radar sensor is when it is horizontally positioned installed pointing in an angle at 58 on the water Fig 5 The exact an gle of the RG 30 is measured internally and is considered at the velocity measurements A constant frequency of about 24 GHz is sent This signal is partly reflected at the water surface and returns with a frequency shift to the antenna The reflected signal is recorded and with user adjustable filter mechanism or without those the velocity is determined The measured velocity corresponds to the flow velocity of the surface at that point where the radar device is pointing to It is essential that a small unevenness of the water surface for example in form of waves is present Only then the signal can be reflected and a velocity determined Velocity measurements are possible if the wave height exceeds 3 mm higher waves improve the reproducibility of the measurement The min
19. G RQCOMMANDER LIGHT eese nennen enne enne enne 16 4 3 5 E e 19 DESCRIPTION OF THE 8 1 lt 110 10 to esee e eese ee 20 ANALOGUE OUTPUT ONLY RG 30A sisssccssssevescsssvaececesssececeusceossuessecssssevsesbvesesescceevebeedsessasesessnbucevbsssesosuscosess 36 INTERFACE COMMUNICATION ovsscosesscssecesscsccsnsesccecesscsentesesescsesesssascsenseese E UE EORR PE oo UE NUUS e Ha 01680850 ea Pee ein nae 37 7 1 RS 485 NTERBACE Ss ack ie Pte eck a 37 2 1 1 IParameleFization 2st la 38 7 1 2 Sensor Er Meade LP Oeste Ea LE RN 38 7 3 Summary trouble shooting 40 7 1 4 Output protocols si eere e Ue er Rete Ree hee LR tds tea eec dee Ea 42 7 2 5121 12 INTERFACE a econ 47 7 2 1 ParamelerizatiOn o eed desi ume EE Es Kr UE PEERS Bs cO mr Se CR CE Ti 46 7 2 2 Operation modes uie eth dau eee Pe dete rt 48 D doen 52 8 1 ERROR CODES teret ise E
20. Sommer Measurement Output MO time after measurement MO information amp special values MO wake up sequences prefix MO prefix holdback 300 ms MO inact timeout for prefix 19 sec RS 485 Baudrate 9600 Transmitter holdback 20 ms Flowcontrol off Sending window 500 ms Receiving window 400 ms Units and decimals Velocity v unit m s Velocity v decimals 3 61 8 6 If you have problems you can not solve please send your RQ 30 settings which can be saved by the following possibilities This helps very much to give you the optimal help If you are using the RQ Commander Be sure that all parameters you adjusted are uploaded into the RQ Commander Load Parameter You can be sure if you press the button Load Parameter on the left side of the RQ Commander In the File menu choose Save Parameters If you are using a terminal program Then save the content of the screen you get after run of Special functions gt View setup 62
21. adjustment also influences the maximum representable velocity in the spectral mode Unit Velocity unit Value range 0 001 to 99999 999 default 5 C F River type The appearance of the flowing water surface is different for every measurement site The type parameter takes account of this circumstance The velocity measurement of turbulent or splashing water demands a higher bandwidth as smooth water surface A low bandwidth optimizes the suppression of external influences But it reduces the reaction on fast velocity changes Therefore it is recommended to select the worst case as the river type Irrigation channels can be set to a low bandwidth rivers with floods should be set to a higher bandwidth Values 1 Slow moving and homogenous water surface default 3 small bandwidth Normal Slow moving and heterogeneous water surface medium bandwidth Turbulent Fast moving and homogenous water surface wide bandwidth Bank area Fast moving and heterogeneous water surface very wide bandwidth Splash water Splashing water surface full bandwidth N Co 4 22 The measurement time is the duration of one single measurement In the defined time range constantly radar spectra are measured and one mean spectrum is formed of which the velocity is calculated It is recommended to measure at least for 10 seconds Be aware that a long measurement
22. bdc Oxfbbf Oxeb9e 0 9079 0 8058 Oxbb3b Oxabi a Ox6ca6 0x7c87 0 4 4 5 0x2c22 0 3 03 0 0 60 0 1641 Oxedae Oxfd8f Oxcdec Oxddcd Oxad2a OxbdOb 0 8468 0 9049 0 7 97 Ox6eb6 Ox5ed5 Ox4ef4 0 3 13 0 2 32 0 1 51 0x0e70 Oxff9f Oxefbe Oxdfdd Oxcffc Oxbfib Oxaf3a Ox9f59 Ox8f78 0 9188 0 81 9 Oxbica 1 10 Oxci2d Oxfi4e 16 0x1080 0x00a1 0 30 2 0 20 3 0 5004 0 4025 0x7046 0x6067 0 8309 0x9398 Oxa3fb Oxc33d Oxd31c 0 Oxf35e 0 0201 0x1290 0 2213 0 3202 0 4235 0x5214 0 6277 0 7256 Oxb5ea 0x95a8 0x8589 Oxf56e 54 Oxd52c 500 0 34 2 0 24 3 0 14 0 0 0481 0 7466 0 6447 0 5424 0 4405 Oxa7db Oxb7fa 0x8799 0x97b8 Oxe75f Oxf77e Oxc71d Oxd73c 0 2643 Ox36f2 0x0691 0 1600 0x6657 0x7676 0x4615 0x5634 0 94 Oxc96d Oxf90e Oxe92f 0 99 8 0x89e9 Oxb98a Oxa9ab 0x5844 0x4865 0x7806 0x6827 0 18 0 0 08 1 0x3882 0x28a3 Oxcb7d Oxdb5c Oxeb3f Oxfbie Ox8bf9 Ox9bd8 Oxabbb Oxbb9a 0x4a75 0 5 54 0x6a37 0x7a16 OxOafi Ox1adO Ox2ab3 0x3a92 Oxfd2e OxedOf Oxdd6c Oxcd4d Oxbdaa Oxad8b Ox9de8 Ox8dc9 0 7 26 0 6 07 0 5 64 0x4c45 2 0 2 83 0 0 OxOcc1 Oxefif Oxff3e Oxcf5d Oxdf7c Oxaf9b Oxbfba Ox8fd9 Ox9ff8 0x6e17 0x7e36 0x4e55 0x5e74 0x2e93 Ox3eb2 1 1 0 E Tab
23. by entering the menu key in the left column Either sub menus are opened or the specific parameter is displayed with the corresponding unit Changes are verified with Enter editing is aborted with Esc Sub menus are closed with X The menu is not case sensitive If the main menu is closed the sensor starts an initialization process with the message Start init The end of the initialization is shown by the message Init done A Measurement trigger interval B Measurement interval 20 sec Velocity v D Technics E Special functions Fig 18 Main menu opened with the RQCommander light showing the default adjustments for the Measurement trigger and Measurement interval Measurements can be triggered by an adjustable interval by the TRIG input or over the SDI 12 or RS 485 bus alues 1 interval efault 1 2 TRIG input 3 SDI 12 RS485 If option 2 TRIG input is selected then measurements are started when the flank of the signal at the TRIG input rises from the Low Level 0 0 6 V to the High Level 2 30 V according to the specified levels If option 3 SDI 12 RS485 is set the timing will be controlled with incoming commands from the RS 485 or SDI 12 interface The sensor has a separate time control for the measurement interval The output of the measurement values via the serial interface is performed either directly after the measurement or is requested via the data
24. cation with tidal influences two flow directions may occur If the upstream moving velocity is also measured it is marked negative in the output values alues Justdownstream Only downward velocities are output efault 2 Two tide To the sensor and from the sensor The RG 30 sensors only measures its own inclination against the horizontal level A correction angle can be implemented to compensate the influence of the inclination of the 21 river surface Depending on the flow direction it is either added to or removed from the installation angle of the sensor The most rivers have a very low inclination between zero and one degree so the influence of this parameter on the measurement results is in these cases also very low Unit deg Value range 0 to 90 default 0 C D Pivot angle It is recommended to install the radar in the main flow direction If this is not possible the velocity measurement is compensated with respect to the pivot angle Unit Deg Value range 0 to 60 default 0 C E Maximum velocity This parameter defines the upper velocity of the measurement range where the resolution is optimal So input the maximum expected velocity to achieve an optimal high resolution for measurements within the velocity range of your site However also faster velocities than the max velocity are measurable but with lower accuracy Note that this
25. ceive a hexadecimal error code over the RS 485 bus you can find out here what it means 0x0001 Mistake please just enter valid values 0x0002 Mistake please just enter menue choice characters 0x0004 Abortion 0x0008 Timeout 0x0010 Adjustment done 0x0020 Testmode finished 0x0040 ATTENTION parameter conflict view manual 0x0080 Testmode back to menu 0x0100 Denied due to temporarily loaded menu 0x0200 Testmode aborted 0x0400 Error CRC failure 0x0800 Restarted testmode 8 2 RG 30 measurement list The measurement and analysis values of the RG 30 are static and have a fixed index The units and decimal places are defined in the technical menu The first six values are the measurement values of the radar device Typically only these six values are transferred to and recorded in a data logger 8 2 1 Measurement values The Measurement values can also be shown in the Spectrum mode with Measurement Values in the View Menu activated Fig 35 52 1 50 RQCommander light File Mode View Options Help re All Spectrum pe 7 Spectrum Graph Connection Com Port Measurement Graph 5300 File Information 9 5 5 Baud Rate Spectrum Information RTS CTS Handshake Xon Xoff File Name ComPort Measurement Values Terminal Measurement Values Velocity 0 682 Water Level 9999998 Discharge 99999 98 Quality 14241 External Measurem
26. decimals menu depicted with RQCommander A Important If you want to change units do this before all other adjustments Consider that if you change units you have to verify all values also the ones you did not change throughout the complete menu inclusive the analog outputs if used manually You have to transform the values into the new units manually 31 The velocity values are output with the selected units mm s m s km h Values 1 2 3 4 fts 5 6 7 default 2 in s mph kn The velocity decimals parameter defines the number of places after the decimal separator in the output velocity value in combination with the selected unit range 0106 efault 3 E Special functions View spectral distribution B View setup Device status E Temp load factory default F Relaunch program amp Replace program Fig 27 special functions menu depicted in RQCommander light D Set factory default The sensor switches into a test mode and lists the spectral distribution whenever a measurement is performed Fig 28 The spectrum can be recorded and visualized with the software RQCommander light Because of the high amount of data for spectral depiction it is dependent from the logger if the record works also during this test mode So the test mode automatically aborts after 30 minutes 32 RQCommander light Se a File Mode View Opti
27. dependent from your used keyboard layout the cross bar with the hexadecimal code x007C is the right one 41 7 1 3 4 Error Codes see ch 8 1 7 1 4 Output protocols Under Main Menu gt Technics gt 5 485 Protocol gt Output protocol OP type different protocols are selectionable which are presented here 7 1 4 1 Sommer Protocol The order and index of the measurement values are defined in the RG 30 measurement list gt Ch 8 2 Sommer Protocol strings include an identification header multiple measurement values and the CRC Code Example Output 00016005 0999999 8 01 9999998 02 0 682 03 0 80 0499999 98 0599999 98 5739 Additionally if in the submenu information the option amp special values is chosen an additional special values string is output only placeholders Header placeholder If in the submenu MO information the option amp analyze values is chosen two analysis strings are output additionally to the two strings above lt Header peak width direction CSR eaofthe RMSatthe amplification CRC More details regarding the measurement and analysis values can be found in Ch 8 2 Header The header information starts with the start sequence M Then the radar device is identified by the System Key ee and the device address 91 adjusted in the RS 485 protocol settings Next the string is identified by the command ID G for example defines a blocked sending
28. der Technics gt RS 485 protocol gt Measurement Output MO time There following options are available e just per command The measurement values are only output after a request Polling Master Slave Concept is conserved e after measurement the logger must be able to receive the measurement date after a wake up sequence all time Pushing leads to a break up of the Master Slave Concept e amp pos TRIG slope If the logger is not able to hold its interface active and can not be woken up by this So eventually it is possible to wake up the logger with a TRIG slope Hardware Polling 37 7 1 1 Parameterization see Appendix ch 8 3 1 1 12 Sensor Commands The command strings are sent to the sensor in the Sommer Protocol Structure The strings include a header to address the radar device the command and the CRC 16 To ensure that the commands that start with W get received correctly these commands have to end with CRC 16 code At commands that start with 5 the CRC 16 is not necessary Parameter Format start sequence hash key and W with acknowledgement of receipt or S without acknowledgement system key DD 2 digit decimal number device number DD 2 digit decimal number command and command with two lower case letters Separator CRC 16 obligatory for W strings 4 digit hexadecimal code end sequence
29. device number adjusted in the RS 485 protocol settings Parameter Format start sequence X M or Z and an underscore system key DD 2 digits device number DD digits Example M 00 01 Measurement values Values are separated from each other with a blank The values have a length of 8 characters inclusive the decimal separator dot or comma The character as a decimal separator and number of significant places after the decimal separator are defined in the Technics menu The values are right justified and filled with blanks on the left side Parameter Format Separator blank Value FFFFFFFF 8 float characters not significant places are replaced by blanks Example blank 9 15 The protocol string ends with the control characters Carriage Return and Line Feed 44 7 1 4 3 Protocols for compatibility To enable further use of existing logger and program configurations after exchange of RG 24 or RQ 24 devices by RG 30 devices following three protocols are available the MIO protocol with checksum the same protocol but with CRC 16 instead of the checksum and the Standard protocol with the same measurement list as in the RG 24 Note that the MIO protocol is not a comma sign protocol and therefor demands special adjustments For compatibility to existing RG 24 you also have to set following adjustment Technics gt RS 485 protocol gt MO information gt main value
30. digits are not sufficient to represent the number then 9999 is output 46 7 2 501 12 Interface The SDI 12 is a serial data communication standard for interfacing multiple sensors with a single data recorder SDI 12 uses a shared bus with a ground wire a data wire indicated as SDI 12 and an optional 12 V wire The abbreviation stands for Serial Data Interfaces with 1200 baud RG 30 ov white 4 C GND brown Vsupply 6 V 30V SDI 12 Logger green TRIG i yellow ground line e 5 485 NN RS 485B serial data line ink e SDI 12 blue 4 DigOut 12 tne red mm OutGND black IOUT1 IOUT2 IOUT3 IOUTA violett blue red grey pink optional other SDI 12 sensors Fig 34 Configuration for operating the RG 30 with optional additional sensors using SDI 12 The connection of the 12 V line as a power source for the sensors is optional and in that case the RG 30 does not need another power supply A recommended full description 48 pages of the SDI 12 Standard is free available under http www sdi 12 org sdi 12 table of contents htm Here are only some important aspects and specialities regarding the RG 30 discussed 47 Meaning of the sensor identification string The default address in the following abbreviated with an a of every sensor is zero T
31. djustments then check the following settings Measurement trigger interval Measurement interval gt Velocity 2 Measurement type continuous RS 485 protocol 2 Measurement output MO time after measurement If you still have no answer then it is suggested to reset the adjustments of the RG 30 temporarily to factory settings Special functions gt Temp load factory default So you can see that the device outputs measurement results with the factory settings more about this function on p 35 18 4 3 Boot message If you have already an active connection between Netbook and RG 30 before you connect the RG 30 to the power supply you can watch the Boot message of your device in the terminal of e g HQCommander Preconditions o Netbook and RG 30 connected o Open RQ Commander or other terminal program o connection active gt in RQ Commander the button Connect has to be active see red circle in the screenshot below After connecting the power supply the Boot message is displayed Terminal 0 8 8600 x l 0 m The string 1_43 is the firmware version r00 is a company internal release number The last two outputs affect the addressing within the RS 485 bus 500 means that the System Key is zero and D01 means that the device number is one 5 Description of the parameters The main menu is opened by quickly entering three question marks 222 in the terminal program The menu items are accessed
32. e menu item with the keyboard so the corresponding parameter s can be edited The selected parameter is displayed with the appropriate units and the new value can be entered A description of all the parameters is found in gt 5 Description of the parameters E j New Connection HyperTerminal File Edit View Call Transfer Help 808 Anschlusseinstellungen Bits pro Sekunde 600 Datenbits 8 Use country reaion code and area c Redial an busy Paritat Keine Stoppbits Busssteuerung M Disconnected 1 Fig 14 Adjustment of the interface properties with the proper factory settings in English baudrate gt 9600 data bits gt 8 parity gt none stop bits gt 1 flow control gt none under HyperTerminal the selection field indicated with the question mark must be changed dependent on which interface you chose to connect the RG 30 Inserting the key X or x closes the menu Then the sensor initializes itself After that if the RG 30 has appropriate or the preset factory settings then the sensor automatically starts the measure process 14 3 5 New Connection HyperTerminal 3 M 3 3 3 JE CC CC JE JE JE 9 9 JE JE 9 9 JE 9 9 9 Main menu
33. ends on the optionally interface converter between the logger PC and the RG 30 if the RG 30 needs a Sync string or not If the logger is directly connected to the RG 30 it depends on the logger some of them send automatically wake up signals others not 40 For example logger transmits answer of the RG 30 lt CR gt lt LF gt We001 mt BE85 lt CR gt lt LF gt ttA00010k mt 4FAI lt CR gt lt LF gt lt CR gt is the Carriage Return lt LF gt is the Line Feed Time limits Between the string for synchronizing and the following command a maximum time span of 3 s is recommended 7 1 3 2 Prevent problems with the CRC If you have problems with the CRC Code although considering that it is dependent on the system key and device number as shown in Ch 7 1 2 2 or if you just do not want to use the CRC you can use you can use the commands beginning with an S silent commands without CRC e g S0001 mt If you want you can leave the semicolon away in connection with S commands 7 1 3 3 Prevent problems with different keyboard layouts For example on the chinese keyboard two different cross bars are available Keyboard layout 467 Chinese Hong Kong S A R Taiwan See SIRI Pt APL not this Key vikia take this cross bar z px Char q Unicode m EE S Sh U 007C Vertical Line ttc 5 In
34. ent 999999 8 Discharge Sum 99999 98 Terminal COM4 8600 a J oj m ow oO iD 00 m iD QNO m 28 3 5 42 v mvs QJ 1 Spectrum 7 SpectralMode Normal Mode t 0 Imm Fig 35 Picture to show how the measurement values can be shown in RQCommander light The value indices according to the order in the different protocols 7 1 4 Output protocols with their respective quantities and meanings are shown in Tab 13 Value Value Description Index 0 laceholder 1 laceholder 2 velocity flow velocity 3 Quality quality parameter of the velocity measurement 4 laceholder 5 laceholder Tab 13 Measurement values the unit of the velocity depends on the selection of the user in Technics gt Tech velocity gt Unit Special values which can occur are o Initialising value 9989 998 o Conversion error 9999 997 o positive Overflow 9999999 o negative Overflow 9999999 53 The Quality parameter Value Index 3 The Quality parameter is related to the measured velocity distribution e g in Fig 35 on the left It looks like a floating number but it is composed of three different quantities the SNR on the places before the decimal separator and amplification and bandwidth afterwards Meaning Signal to Noise Rati
35. erization Fig 11 RG 30 with data logger at the RS 485 interface Note that the RG 30 GND Vsupply TRIG RS485 A RS485B 50112 DIGOUT IOUTGND IOUT1 IOUT2 IOUT3 optional other RS 485 sensors 10 3 4 2 2 SDI 12 RG 30 0v white GND brown wm Vsuppy 6V 30V SDI 12 Logger green TRIG ground line Yellow RS 485 A RS 485B serial data line e C pink SDI 12 blue i 12 V line 1 w 29 black louT4 violett IOUT2 blue red rey pink T IOUTA optional other SDI 12 sensors Rum vigne ye Fig 12 Configuration for operating the RG 30 with optional additional sensors using SDI 12 The connection of the 12 V line as a power source for the sensors is optional 3 4 3 Data logging at the analogue output only RG 30a RG 30a GND e Vsupply TRIG RS485 A RS485 B 80112 DIG Out IOUTGND IOUT1 IOUT2 M urs 90 proportional to flowvelocty greypnk jours as adjusted by the user Fig 13 For connection to the RG 30a IOUT the resistance inside the logger should not exceed 470 12 4 Setting up Operation using a computer After you have connected your RG 30 according to Ch 3 4 1 you can go on with this chapter Here the steps to get into normal operation using the
36. haracters on the left are filled with blanks The measurement string ends with the separator CRC The protocol string ends with a CRC 16 8 4 Sommer CRC 16 the end ID and the control character Carriage Return and Line Feed Parameter Format CRC 16 HHHH 4 hex End ID control characters CR LF example 9E31 CR LF Tab 4 Last part of the Sommer Protocol Analysis Values The meaning of the analysis values can be found in gt 8 2 RG 30 measurement list 43 7 1 4 2 Standard Protocol The Standard Protocol is similar to the blocked data output of the Sommer Protocol It is simpler and therefor easy to use in external logger systems There are only two data strings available The first string is always transmitted and includes the 6 measurement values The second string can be set active in the RS 485 protocol menu and includes the 12 analysis values of the measurement list Example Output meausurement values special values optional The special values are only output if in the submenu MO information the option amp special values is chosen If in the submenu MO information the option amp analyze values is chosen two analysis strings are output additionally to the two strings above Header The header starts with the start sequence M identifies the measurement string and 7 the analysis string The radar device is identified by the system key and the
37. he sensor interface will respond with a string of the following format after sending the Send Identification command Meaning SDI 12 specified Format sensor address 1 digit SDI 12 version D 1 digit number before dot SDI 12 version D 1 digit number after dot company name XXXXXXXX 8 characters kind of firmware XXXXXX 6 characters firmware version 3 characters comment upto 13 characters example 1 Sommer RX 30 111 RG 30a Tab 6 Meaning of the answer string on the Send Identification Command 1 The example string indicates a SDI 12 version number of 1 3 7 2 1 Parameterization see Appendix ch 8 3 2 7 2 2 Operation modes a Interval mode measurements are not triggered by the SDI 12 bus This mode is the recommended mode for use with the 501 12 bus To select this mode the measurement interval has to be chosen Main menu gt Measurement trigger gt interval It is also possible to set the sensor to cyclic operation using the extended command XWA 1 With the command you can read the results from the sensor Tab 7 command response from the RQ 30 from left to right aRO lt CR gt sensor address values with Indices 0 7 e g 0 16 5 8964 2 452 29 93 0 00 99999 98 2 444 0 00 lt gt lt gt 8 Assignments for reading the results using the aR co
38. he RS 485 Interface with your computer Because of the usual absence of such an interface there you have to use an interface converter which is also available optionally from Sommer If your computer has a free USB port you can connect to that port according to Fig 8 and Fig 9 using an optional available RS 485 to USB converter x converter USB nano 485 RS 485 Fig 8 Using the USB nano 485 to connect to a computer for parameterization with a terminal program or RQCommander light RG 30 PC GND Vsupply 6 V 30V TRIG 5485 RS485 80112 DIGOUT USB Nano 485 IOUTGND IOUT1 IOUT2 IOUT3 IOUTA blue red grey pink Fig 9 Connection details for Fig 8 ov C white 36 2 45 VDC brown green crossed cable yelow grey RS232 RS 232 Ub 4 15 VDC 9 ALONE enp RS 232 TTL RB EXGND Sommer IFD RS232 RS485 pink blue red black violett blue red grey pink GND Vsupply 6 TRIG RS485 A RS485 B 50112 DIGOUT IOUTGND IOUT1 IOUT2 IOUTA 30 VDC Fig 10 Configuration for operation with a PC over its RS 232 interface Sommer interface converter has an upper limit of 15 VDC 3 4 2 3 4 2 1 RS 485 Logger RS485 A RS485 0v d 6 30V Data logging paramet
39. ied by the system key and the device number Then the command mt follows The request string is completed with a separator the CRC 16 the end sequence and carriage return with optional line feed Please consider that the CRC Code is dependent also on the system key and the device number For example system key device number command inclusive CRC 00 01 W0001 mt BE85 00 02 W0002 mt E7D5 01 01 wW0101 mt 14D4 01 02 W0102 mt 4D84 Tab 1 Different CRC s in dependence of the system key and device number If for the parameter Technics gt RS 485 protocol gt Measurement Output MO time the option send measurement output after the measurement is chosen the data strings are transmitted automatically after the measurement Otherwise the last measured values have to be requested using the send measurement results command pt Send measurement results command Command string Answer CRC only valid for system key 00 and device number 01 itwooo1 pt 20 010 4 8 35 itSoo01 pt 2FE6 none 39 Request of single values The measurement values can also be requested individually by the following commands Values are requested with the start sequence the device identification as identifier for values the value index with two digits a zero as a fill character and the command cv for channel value The value index indicates the kind of variable according to gt 8
40. imal measurable flow velocity is about 0 15 m s but this depends also on the kind of wave pattern 3 Placement and Installation The installation is simple Existing bridges can be used very well Also the installation at the riverside is possible using for example an extension arm 3 1 Selection of the measurement site Essential for best reasonable results is a measurement area free of disturbances as stones rocks or artificial constructions Swirls have a high influence on the measurement and do not allow precise determinations of the flow velocity at the measurement surface The most representative places are at a straight running channel with constant width and laminar current behaviour Narrowing and widening of the river Fig 4 picture in the upper right corner as well as branching inflows or curves are less suitable Good or better site Fig 4 Choice of measurement site at the site shown in the lower left corner the RG 30 can be installed on both ways looking downstream or upstream The assembly of the RG 30 in the way that the velocity sensor of the RG 30 looks against the flow direction has the advantage that influences of rainfall can be more easily eliminated by the software Additionally this method prevents measurement deviations by the impact of bridge piers on the flow 3 2 Measurement spot of the sensor For a suitable measurement site it is important that the main measurement field of the se
41. irst a value between 4 and 20 mA is entered and confirmed This current then automatically is applied on the active analogue output The measurement value corresponding to the set current are displayed for the output Finishing the procedure deactivates the test mode EJ 5 485 protocol Device number B System key o Output protocol type Sommer e D Measurement Output time after measurement MO information special values v wake up sequences pss e 6 MO prefix holdback 300 ms MO inact timeout for prefix fis sec Fig 24 The RS 485 protocol menu showing the default settings Sensors in a system are indicated by the device number Multiple connected sensors are separated by this address range 0 to 98 efault 1 A system key can be assigned to define a measurement system As measurement systems can interfere each other for example by radio transmissions they are separated by the System key Sensors in a system are indicated by the device number ER range 0 to 99 efault 0 Sets the type of the output protocol A definition of the protocol formats can be found in 7 1 4 Output protocols It is recommended to select the Sommer or Standard protocol The other protocols are only implemented for RQ 24 compatibility alues 1 Sommer Sommer protocol efauti 2 Standard Standard protocol 3 24
42. mmand for the assignments to the value indices refer to Tab 9 48 AUX water level measurement velocity results quality water discharge discharge sum special learned velocity results learned discharge Tab 10 RQ 30 commands value output list for the interval mode factory default positions these can change according to relation W v priority If you don t want to use the aR command the RQ 30 offers the possibility to read the measurement values also in this mode with the aM or aC command although that would not be provided by the 501 12 standard In this case the answer on the aM or aC command is also the number of values but in contrast to the SDl triggered measurements mode described a the measurement duration is zero and the RQ 30 does not send a service request So you can request the values with the aDn command directly afterwards b The measurements are triggered by the SDI 12 bus To select this mode the measurement interval has to be chosen Main menu gt Measurement trigger gt SDI 12 RS 485 It is also possible to set the sensor for SDI 12 trigger mode using the extended command eXWA 3 If the measurements should be triggered by a logger over SDI 12 then RS 485 commands for triggering mt are not allowed because these could lead to conflicts within the processes Starting a measurement is possible using the command aM
43. n Position String CRC 16 Start 0000 0 0023 1 M 234D 2 5931 3 MO FAEC 4 M00 A265 000 099 ii Tab 20 16 Example the arrows indicate the recursive use of the calculated CRC 16 Code 60 8 5 Factory default parameter settings Using the menupoint Main menu Special functions View setup you DI DIA DIB can output following list the service parameters are not shown here Measurement trigger interval Measurement interval 20 sec Velocity v Viewing direction upstream Possible flow directions just downstream River inclination 0 deg Pivot angle 0 deg Maximum velocity 5 m s River type turbulent Measurement time 20 sec Measurement type continuous Minimal requirement of SNR 0 96 Filter no of values 1 Filter type moving average Technics Language Sprache english englisch Decimal character dot SDI 12 address 0 Reset behaviour hard reset Inclination measurement first measurement 4 20 mA output IOUT3 Status always on IOUTS3 Max velocity 10 m s RS 485 protocol Device number 1 System key 0 Output protocol type
44. n is active or for a specific time Therefor prefixes are only necessary when the receiver is not awake The time in seconds the communication has to be inactive before a new prefix is sent is defined with the inactive timeout parameter Unit 5 Value range 01060 default 19 RS 485 Baudrate 600 B Transmitter holdback 20 ms Flowcontrol off D Sending window 500 ms E Receiving window 400 ms Fig 25 The RS 485 menu showing the default settings The baud rate in bits s of the RS 485 interface can be selected from a list Selection Value bits s default 9600 1200 2400 4800 9600 19200 38400 57600 115200 SOJINI TA ON The RS 485 waits a specific time before it transmits data Unit ms Value range 1 2000 default 20 A Xoff Xon flow control be applied for the RS 485 communication alues 1 No flow control efault1 2 XOFF XON blocking Xoff Xon flow control 30 Data strings are transmitted in blocks The length of these blocks is set in ms Unit ms Value range 200 to 5000 default 500 Data is received in blocks The length of these blocks is set in ms Unit ms Value range 50 to 5000 default 400 Units and decimals E A Velocity v unit B Velocity v decimals Fig 26 The Units and
45. nd right b the relation with two tide as adjusted parameter for Possible flow directions 36 7 Interface communication T 1 RS 485 Interface For connection possibilities refer to Fig 8 Fig 11 Theoretically it would be also possible to connect more than one data logger with the RG 30 device s in opposite to the SDI 12 interface However the factory settings include that only one RG 30 and one data logger are present on the bus The RS 485 is a data bus system that means it is possible that several devices data loggers and RG 30 devices can be connected together at the same time To use several Sommer sensors at the same bus two parameters were defined which can be found in the menu RS 485 protocol e system key a number between 0 and 99 Adjusting this number is only necessary if 2 conceptional bus systems must be distinguished necessary e g with overlapping of coverage of remote transmission systems e device number this number specifies the sensor within the bus Generally several possibilities exist for the operation e Pushing the RG 30 delivers measurement values with the adjusted interval e Polling the logger controls the start and output of the RG 30 measurements e Apparent Polling the logger controls the start of the RG 30 measurements After delivery the RG 30 is a Pushing sensor which outputs its data independently after every measurement cycle A change of this operation mode is possible un
46. nditions it is possible that an internal algorithm decides to put out the last result again instead to generate new results C J Filter no of values The velocities of single measurements are added to a buffer refer also gt C G Measurement time the definition of single measurement The buffer has always the defined size If the buffer is full a new value cases the oldest value in the buffer to be eliminated The buffer size is related to the dynamic of the water surface Regulated river due to hydro power have a high dynamic and demand a small buffer size smooth rivers or irrigation channels have a low dynamic and may use a high buffer size Value range 1 2 120 Special function 1 No Filter default 1 C K Filter type The velocity values in the buffer are filtered There are four different filter calculations Values 1 Moving average mean value Simple Moving Average of all buffer default 1 values is calculated 2 Eliminate spikesThe mean value is calculated from all buffer values excluding the maximal value 3 Minimum value Only the smallest measurement value from the buffer is considered as output value 4 Medium value All values in the buffer are ranked according to their size The value which is positioned in the middle is output as the measurement result Annotation to filter type 2 and 3 Measurement errors are more probable with
47. nsor is at a representative position in the channel and not influenced by vegetation which leafs can move in the wind The diameter of this clearance area is twice of the measurement spot e g 8m 12m 24m Fig 5 Measurement spot in dependence of the installation height 3 3 Installation Possibilities Dependent on the measurement site there are different possibilities to install the RG 30 for example on a bridge railing bellow a bridge or on an extension arm Installation on bridge railing Installation below a bridge Installation with extension arm Fig 6 Assembly examples Fig 7 Application on a cable way A Important With this application it is necessary to choose the option 2 every measurement for the parameter Technics gt Inclination measurement 3 4 Connecting the RG 30 There are different possibilities for operation The basic connection possibilities are listed in this chapter Remark for technicians Leave unused connections open as they are do not terminate as it is also depicted in this chapter In the delivery state the following adjustments apply for communication over the RS 485 Baud rate 9600 Data bits 8 wires of the RG 30 Parity Stop bits Flow control 3 4 4 Parameterisation with a connected computer For the parameterisation with RQCommander light or a terminal program you need to connect to the two wires of t
48. o Amplification Bandwidth Units Po amplification class bandwidth class one digit one digit The amplification of the RG 30 adjusts automatically on the measured signal with the value 0 for least and 9 for highest amplification The Bandwidth class is dependent on the spectral velocity distribution peak width only viewable with RQCommander light bandwidth class Quotient of width over velocity 8 gt 2 7 gt 1 7 6 gt 1 5 5 gt 1 2 4 gt 1 3 gt 0 75 2 gt 0 5 1 gt 0 25 0 0 25 Tab 14 Definition of the Bandwidth class 8 2 2 Special Values Value Value Index 6 laceholder 7 laceholder Fig 36 The special values are only placeholders here 8 2 3 Analysis Values The following 12 values are analysis values These support the maintenance and optimization of the velocity measurement and can be interpreted by experts to maintain or adjust the velocity measurement Index Value Units Description 8 eak width mm s flow signal bandwidth 9 direction relation 10 CSR Po distortion signal divided by flow signal 11 area of the peak 12 RMS at the PIC amplification regulation instantaneous value 54 13 amplification 14 amplification balance 15 signal balance 16 error code 17 no meaning for further development 18 no meaning for furthe
49. ons Help E Spectrum Parameter Terminal Spectrum Graph Connection a Com Port COM4 5700 Baud Rate 4800 RTS CTS Handshake Xon Xoff E File Name 4275 Terminal 4 4800 i eJ Ol m 48 0 0 7 14 21 28 3 5 42 49 56 63 v m s l e Mode m m Fig 28 Visualized spectrum of a test signal the columns In the terminal window from left to right are velocity with units cm s the number of samples with the respective velocity with positive sign and the number of samples with the respective velocity with negative sign It is also possible to zoom into the spectral depiction as indicated in Fig 29 To zoom out just right click anywhere into the diagram The string RAW within the terminal window includes additional spectrum information which can be shown also in an own window Fig 30 The yellow shaded area is the part which is evaluated to determine the velocity Which area is shaded is controlled indirectly by the choose of the river type with the parameter velocity river type 33 1996 25 1614 375 81232 5 850 625 468 75 86 875 B3 1 Spectrum 15 Normal Mode Fig 29 Zooming with dragging a window by left mouse click and hold 7 RQCommander File Mode View Options Help Em 3 Spectrum Profile Time Series Parameter Spectrum Information 0 Spectrum Gra
50. ph Terminal COM4 9600 E x m Terminal Index Type 2400 Color m 1800 7 anis b 0 52 52 1 1 Approach Depai 1 22 34 Value 1 850 1200 1 1 1 1 1 41 4 1 2 14 14 Min Velocity 0 39 0 70 3 14 16 600 3 15 16 Mean Velocity 1 83 1 85 4 M ET Max Velocity 2 69 340 2 15 22 Pos 1st Maximi 1 87 1 84 6 15 30 Pos Sink 187 184 4 zn xx 8 25 22 i Pos 2nd Maxim 1 87 1 84 8 21 27 Ration 1st 2nd 100 10 9 30 26 Ration 100 100 19 32 11 35 16 SNR Main Pea 25 651 2 44538 T 8 9 12 47 17 Amp Main 27 302 v m s 13 30 24 Num Smooth 1 1 14 30 21 NetCSR 33 g Fig 30 Spectrum Information window set as visible under View menu from the menu line 34 All parameters with the adjustments of the sensor are listed block wise Displays information about the sensor and its status Sets all parameters to the default values predefined by the manufacturer In a temporary mode all parameters are set to the default values but can not be edited The user can check the default values calling the Main menu again with The temporary mode is automatically terminated then after exit of the Main menu The sensor is restarted The procedure is equivalent to switching the supply off and on The sensor is set in the boot loader mode for three minutes to upload new software
51. r development 19 no meaning for further development Tab 15 Analysis values 8 3 Parameterization with interface commands 8 3 1 RS 485 The structure of the parameterization string is shown in Tab 16 The menu selection strings are the letter combinations before the name of the parameters You can find these selection strings as part of the parameter titles in Ch 5 Parameter Format start sequence HX hash key and W with acknowledgement of receipt R for read system key DD 2 digit digit number device number DD 2 digit digit number command S menu selection string equal sign parameter value integer Separator CRC 16 obligatory for W strings HHHH 4 digit hexadecimal number end sequence Example 1 HW ee 1 10 Be7C command string without blanks Tab 16 Structure of the parameterization strings The example in the last line shows the adjustment of 10 s for the measurement interval Example communication The string for reading the menu point B measurement interval is sent with R0001B 228E lt CR gt lt LF gt The RQ 30 answers with 1440001B 10 0003 CR LF where A is the abbreviation for answer With W0001B 15 57 lt CR gt lt LF gt the parameter measurement interval is changed to 15 s The sensor acknowledges with 1440001B 15 0803 CR LF 55 8 3 2 SDI 12 It is possible to change the paramete
52. rameters The example in Tab 18 shows how to change the parameter Filter no of values to a value of 4 56 After changing a parameter it is necessary to restart the RQ 30 This is done with the command aXW ts with a for the address digit The RQ 30 then sends ts and CR and lt LF gt back also with a for his address 57 8 4 Sommer CRC 16 The CRC 16 Cyclic Redundancy Check of the Sommer protocol is based on the CRC Table a static one dimension field with 256 unsigned 16 bit unsigned integer values in the hex format Upon receiving the data the receiver recomputes the CRC value to verify that the data was received without error crc16tab 0x0000 0x1021 0x2042 0x3063 0x4084 0x50a5 0x60c6 0x70e7 0x8108 0 9129 14 Oxb16b Oxc18c Oxdiad Oxeice Oxfief 0x1231 0x0210 0x3273 0 2252 0x52b5 0 4294 0 7217 Ox62d6 0x9339 0x8318 Oxb37b Oxa35a Oxd3bd 0 39 Oxf3ff Oxe3de 0x2462 0x3443 0x0420 0x1401 0x64e6 0 74 7 0 44 4 0x5485 5 Oxb54b 0x8528 0x9509 5 Oxf5cf Oxd58d 0 3653 0 2672 0x1611 0 0630 0x76d7 0 66 6 0x5695 0 4604 Oxb75b 77 0 9719 0x8738 Oxf7df Oxe7fe Oxd79d Oxc7bc 0 48 4 0 58 5 0 6886 0 78 7 0x0840 0x1861 0x2802 0x3823 9 Oxd9ed 0xe98e Oxf9af 0x8948 0x9969 90 Oxb92b Ox5af5 Ox4ad4 Ox7ab7 0x6a96 0 1 71 0 0 50 0x3a33 0x2a12 Oxdbfd Oxc
53. rement Range 0 15 to 15 m s Accuracy 50 02 m s 1 96 Resolution 1 mm s Direction recognition downstream flow or tide Measurement duration 5 to 240 s Sample interval 8s 5h Frequency 24 GHz K Band Doppler technology Distance to water surface 0 5 mto 35 m Vertical inclination Measured internally 1 3 Wires MAIN Connector 12 pins trigger input TRIG Low level 0 0 6V High level 2 30 V interface wires RS485 A 1 x RS 485 RS485 B 1200 Baud to 115200 Baud SDI12 1 x SDI 12 1200 Baud analogue output IOUTGND ground for analogue output only usable with RG 30a IOUT1 IOUT2 not used IOUTS velocity IOUT4 not used Fig 1 Pin list of the MAIN male connector take care on the order of the analog output wires it is true that according to this figure the pin M is IOUTS A white GND brown Vsupply 6 V 30V C 221 TRIG trigger input D yellow 1 dE EE reese F 80112 G blue DIG OUT not used H ed IOUTGND J Dia CE IOUT1 not used analogue 4 output K violett IOUT2 not used blue red only useable M IOUT3 with RG 304 L grey pink iour4 not used Fig 2 Pin list of the optional in different lengths available cable for the MAIN connector it is true that according to this figure the pin M is IOUTS 1 4 Housing The RG 30 sensor is embedded in the system housing of powder coated aluminium 154 Fig
54. rs of the RQ 30 also over SDI 12 This can be done using the extended commands pattern offered by SDI 12 Please consider that the reasonability of this possibility depends on the kind of the parameter Parameters for which a change over SDI 12 could be useful are e g the measurement interval or the measurement time The pattern for parameterizing over the SDI 12 interface is the following for reading parameters Meaning Format of the parameter sensor address 1 address digit eXtended X command identifier read R parameter S parameter selection string 1 to 3 characters separator exclamation mark as termination example 1 OXRB example 2 5XRCG Tab 17 Command pattern for reading out the RQ 30 parameters Tab 17 includes examples for reading out parameters example 1 shows how to read the interval from a RQ 30 with the address 0 example 2 reads the velocity measurement time span of a RQ 30 with the address 5 for writing parameters Meaning Format of the parameter sensor address 1 address digit eXtended X command identifier write W parameter S parameter selection string 1 to 3 characters equal sign value F Number format depends on the kind of parameter separator exclamation mark as termination example 0XWCJ 4 Tab 18 Command pattern for writing RQ 30 pa
55. s Further more you have to adjust to m s in Technics gt Tech velocity gt Unit The MIO protocol There can be two variants chosen e Technics gt RS 485 protocol gt compat RX 24 MIO Protocol with the same measurement list as in RX 24 including the check sum e Technics gt RS 485 protocol gt compat RX 24 B MIO Protocol with the same measurement list as in RX 24 including CRC 16 where RX 24 stands for the both variants RG 24 and RQ 24 Following table shows the structure of this protocol for both variants Meaning Format start sequence I the capital letter i device number DD 2 digits system key DD 2 digits velocity DDDD 4 digits placeholder DDDD 4 digits placeholder DDDD 4 digits quality string DDDD 4 characters checksum CRC 16 4 characters end sequence H example for 1 compat RX 24 A T 01 09 0682 0259 0146 0199 0448 2 compat RX 24 T 01 0682 0259 0146 9199 1F1A Fig 33 MIO protocol structure in the variant with the checksum the 4 characters CCCC represented 4 digits In the variant with the CRC 16 code the 4 characters represent a hexadecimal number according to the Appendix 4 digits beginning from the least significant digit without decimal separator if the 4 digits are not sufficient to represent the number then 9999 is output 45 The quality string is a complex of 4 character
56. s with following meaning Meaning Format amplification 0 4004 signal 9 weak signal D 1 digit O low 9 high eak width O narrow gt smooth 5 wide gt turbulent D 1 digit Signal to Noise Ratio DD digits example 01 99 The Signal to Noise Ratio is the quotient of echo strength to output signal strength in 96 Because here only 2 digits are available 99 corresponds to a Signal to Noise Ratio of equal or greater than 99 The Standard protocol with the same measurement list as for RG 24 This protocol can be activated over Technics gt RS 485 protocol gt compat RX 24 C and is easy to implement After the start character the measurement value is separated by a blank Note that no decimal separator is output A data line ends with lt CR gt lt LF gt Carriage Return and Line Feed The structure of the protocol is following Meaning Format start M character blank blank velocity DDDD 4 digits blank blank end lt CR gt lt LF gt Carriage Return and Line Feed sequence example 0682 lt CR gt lt LF gt Tab 5 Structure of the Standard protocol from the RG 24 The example shows the output with a velocity value of 682 mm s The value is dependent of the units you have adjusted in Technics gt Tech velocity gt Units 4 digits beginning from the least significant digit without decimal separator if the 4
57. set historic information is kept and used for the next measurement and calculations This parameter controls the vertical angle measurement trigger The vertical angle of the RG 30 is internally used to correct the surface velocity measurement If the RG 30 is run on a cable way set this parameter to option 2 every measurement alues 1 first An inclination measurement is done during the first efault 1 measurement measurement after the initialisation process after every ower on and parameter change every During every velocity level measurement the RG 30 measurement measures also its vertical angle G 4 20 m output IDUT3 IOLIT3 Max velocity E C Simulate current output Fig 23 The 4 20 mA outpout IOUT3 menu showing the default settings See full description in Ch 6 Analogue Output The activity controls the usage of the analogue outputs They can completely be switched off only be activated during the TRIG input or be set permanently on alues 1 Off efault 3 2 Just during TRIG always The velocity range is defined from 0 to a maximal velocity Therefore the 4 mA value is automatically set to O and only the 20 mA value is entered as the maximal velocity Unit Velocity unit Value range 9999 999 to 99999 999 default 10 27 A procedure to test the analogue output is started F
58. slow flow velocities because then the influence of often faster distortion signals like wind gusts increase 25 D Technics D Reset behaviour hardreset E Inclination measurement first measurement 4 20 m output IOUT3 G R5 485 protocol H 5 485 1 Units and decimals Fig 22 Overview of the parameters in the Technics menu showing the default adjustments The language of the sensor parameter menu is selected alues 1 German Deutsch efault 1 2 English Englisch The decimal separator is set for the complete sensor including the output and the menu parameters alues Comma efault 1 2 dot The address is the unique identifier of the sensor within the SDI 12 bus system EN 0 1 99 efault 0 The sensor keeps some information in its memory These are for instance the inclination of the sensor the last amplification or the buffer values for mean value calculation The setting defines if this information is deleted on a reset of the sensor During the implementation procedure a hard reset is recommended After the correct installation the value should be switched to soft reset to minimize the start up time and to suppress a multiple adjustment of the inclination 26 Values 1 reset reset deletes the complete historic measurement information default 1 and determines it new 2 Softre
59. st choose the tab Parameter RQCommander light File Mode View Options Help Spectrum Parameter Terminal Then start the Load Schema process according to Fig 16 and Fig 17 It is suggested to save the Schema after the load process to avoid that at the next time RQCommander light is started again a new load process is necessary 16 K RQCommander light 4 7 st ji l 53 E Spectrum Parameter Terminal Sensor Parameter Information Sensor Parameter Connection Filename Com Port COM4 Description Baud Rate 9600 Device Type 20 RTS CTS Handshake Setup Type 1 01 02 Xon Xoff a Configuration 1 5 File Name Code 0000 3 Terminal COM4 9600 mi MESS SYSTEMTECHNIK Batch Mode Sensor Parameter Jobs e Open Parameter File Save Parameter File Load Parameter transfer schema error list Send All Parameter wait time 5 s IE Send Madified Parameter amp Load Schema 17 Save Schema File TUN ATTENTION Fig 16 Display during transferring the scheme after a click on Load Scheme on the left side To a normal course of the load process belongs also the reading of the error codes on the right side in the terminal window Adjusting the parameters The Main menu with its submenus A to E Fig
60. urement output includes measurement values amp special values the special values are only laceholders here 3 amp analysis values Measurement output includes measurement values amp special values amp analysis values D G F MO wake up sequences If a receiving device does not request data but measurement outputs are pushed by the radar sensor many receiving devices have to be waken up before the measurement data can be processed by these devices The RG 30 provides Sync and prefixes for this procedure see also gt 7 1 2 1 Wake up Sync is the string sent directly before the measurement string Prefix is a blank sent also prior to the measurement string but with a time delay Values 1 off default3 2 sync Output string includes directly before the string 3 prefix Output string includes prior to the string with time delay 4 prefix sync Output string includes prior to the string with time delay directly before the output string D G G MO prefix holdback The MO prefix holdback defines the holdback time of the prefix which determines the time delay between the sending of the prefix and the sending of the data string Unit ms Value range 0 to 5000 default 300 29 A prefix can be used to wake up a receiving device The device is kept awake as long as the communicatio
61. verify your firmware version is explained in Ch 4 3 Boot message CE compliance This product is in conformity with the following standards EN301 489 1 3 V 1 6 1 Safety EN 60950 1 Health EN 62311 R amp TTE EN 300 440 2 V1 2 1 following the provision of directive R amp TTE 1999 5 EC FCC compliance This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 This device must accept any interference received including interference that may cause undesired operation FCC ID UXSIMS944 Safety Information Please read this entire manual before setting up or operating this equipment The non compliance of this manual could result in damage to the equipment Also in the case of non compliance injuries of individuals can not be excluded totally To make sure that the protection provided of and by this equipment is not impaired do not use or install this equipment in any manner other than that specified in this manual Modifications which have not been explicitly authorized by Sommer lead to the expiry of the permission of operation as stated by FCC 1 Contents Nau elg WuLO c 1 1 1 te dl ieee ae nes 1 1 2 VELOCITY MEASUREMENT 4 01 1
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