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Operating instructions Present Weather Sensor OTT Parsivel2

1. Power supply 24 V DC 100 W Control cabinet version Accessory Connection b Mains voltage 100 240 Ports for Be to datalogger 2298 Go aloleleiololale Terminal strip for control cabinet installation alololelololala not in scope of delivery 2 e OTT Parsivel connection cable Assignment is dependent on device configuration 27 Fig 18 Connecting power supply protective housing version to the OTT Parsivel Install the power supply onto the pedestal of the OTT Parsivel using the bolts and nuts supplied In this case the connection cable has a length of one meter Feed it through the hole in the leg and one of the three cable connections on the inside of the power supply 28 Connection Ports for connection to a datalogger pod 7 Integrated fuse spare fuse Power supply 24 V DC 100 W Control version Accessory Mains voltage f 100 240 V AC Y H PE A Remove bridges depending on 2 2 2 SS ge _ application strips 2 ll Gelee Gd ees e z 1 2 3 4 5 6 7 8 5 Pulse 6 Pulse 7 RS 485
2. Laser beam A Receiver Transmitter eceive Precipitation particle Measurement of particle size If there are no particles in the laser beam the maximum voltage is output at the receiver Precipitation particles passing through the laser beam block off a portion of the beam corresponding to their diameter thus reducing the output voltage this determines the particle size Measurement of particle speed To determine the particle speed the duration of the signal is measured A signal begins as soon as a precipitation particle enters the light strip and ends when it has completely left the light strip The following parameters can be derived from these two determined quantities Size spectrum Type of precipitation Kinetic energy Intensity of the precipitation Radar reflectivity Visibility The splash protection attached to the sensor head prevents precipitation particles from deflecting off the housing falling into the laser beam and thus falsifying the measurements 5 2 Connection options for the OTT Parsivel The OTT Parsivel can be connected to various devices as shown in the illustration below Refer to the respective chapters in this regard Chapter 8 Cable max 300m RS 485 Interface converter RS 232 USB power supply optionally on pedestal Pedestal Power supply _ ASDO Basic Storage with Storage withou
3. off off on on 2 wire communication Connect the OTT Parsivel as follows to the 6 pin terminal of the interface converter Interface converter RS 485 USB oooooQ 12 5 A 6 d R 1200 Max cable length 300 m Max cable length lt 20 m Remove bridge DQO Terminal strip Excmi Power supply 24 V DC 100 W Protective housing version 7 8 L I 2 I OTT Parsivel connection cable L 2 m PZZ 8 8 Pelo 8 2 I Fig 16 Position of the USB service inter face in the OTT Parsivel base Meaning of the LEDs A green Communication via RS 485 SDI interface active B green USB interface active C red an error has occurred D yellow particle recognized 8 4 Connecting the OTT Parsivel to any RS 485 interface converter When using an interface converter that can not be purchased as an accessory from OTT Hydromet the following must absolutely be adhered to Interface converters must be configured in the automatic send receive control mode for 2 wire connections through software commands without hardware handshake cables and Echo Off The interface converter must be galvanically isolated 8 5 Connecting the OTT Parsivel to a PC for configuring using a USB interface If you do not want to work with the factory settings of the OTT Parsivel and read out the data only with a datalogg
4. Operating instructions Present Weather Sensor OTT Parsivel We reserve the right to make technical changes and improvements without notice Table of contents 2 3 10 12 13 14 Scope of delivery Order numbers OTT Parsivel factory settings Safety instructions Introduction 5 1 Functional principle 5 2 Connection options for the OTT Parsivel Installing the OTT Parsivel 6 1 Cable selection 6 2 Connecting ground to OTT Parsivel 6 3 Installing the OTT Parsivel on a pedestal Connecting the OTT Parsivel to a datalogger 7 1 Connecting the OTT Parsivel to an OTT netDL IP datalogger using an RS 485 interface 7 2 Connecting the OTT Parsivel to a datalogger using an SDI 12 interface 7 3 Connecting the OTT Parsivel to a datalogger with pulse input Connecting the OTT Parsivel to a PC 8 1 Connecting the OTT Parsivel to the RS 485 RS 232 interface converter 8 2 Connecting the OTT Parsivel to the ADAM 4520 RS 485 RS 232 interface converter 8 3 Connecting the OTT Parsivel to the RS 485 USB interface converter 8 4 Connecting the OTT Parsivel to any interface converter 8 5 Connecting the OTT Parsivel to a PC for configuring using a USB interface Connecting the OTT Parsivel to a power supply Heating the OTT Parsivel sensor heads Operating the OTT Parsivel with a terminal software 11 1 Setting up communications between the OTT Parsivel and the terminal program 11 2 Measurement numbe
5. see Chapt 12 1 Measured value format pb Range 0 3 value8 Heating current A Measured value format pb ee Range 40 00 4 00 A lt value9 gt Power supply voltage V Measured value format pbb e Range 40 0 30 0 V P Sign b Number before decimal point Output without leading zeros e Number after decimal point Start additional measurement and request CRC Cyclic Redundancy Check for details see command aM1 The responses to the following and aD1 commands are extended by one CRC value a lt valuel gt lt value2 gt lt value3 gt lt value4 gt lt value5 gt lt value6 gt lt CRC gt lt CR gt lt LF gt or a lt value7 gt lt value8 gt lt value9 gt lt CRC gt lt CR gt lt LF gt Start concurrent meassurement simultaneous measurement with multiple sensors on one single bus line for details see command aM1 The number of measured values in the response to this command has two digits nn 02 Start concurrent measurement simultaneous measurement with multiple sensors on one bus line and request CRC Cyclic Redundancy Check for details see command aM1 The number of measured values in the response to this com mand has two digits nn 02 The responses to the following and aD1 commands are extended by one CRC value a lt valuel gt lt value2 gt lt value3 gt lt value4 gt lt value5 gt lt value6 gt lt CRC gt lt CR gt lt LF gt or a lt value7 gt lt
6. Response OTT Parsivel 009 n Number of measured values Response OTT Parsivel 8 a lt CR gt lt LF gt Service request Send data Part 1 after aM aMC aC acc a Sensor address valuel Rain intensity mm h Measured value format pbbbb eee Range 0 000 9999 999 mm h value2 Rain amount accumulated mm Measured value format pbbb ee Range 0 00 300 00 mm value3 Weather code according to SYNOP w w Table 4680 Measured value format pbb 1 Range 400 499 lt value4 gt Radar reflectivity dBz Measured value format pb eee Range 9 999 9 999 dBz lt value5 gt MOR visibility in precipitation m Measured value format pbbbbb Range 0 20000 m lt value6 gt Sample interval s Measured value format pbbbb Range 0 3600 s P Sign b Number before decimal point Output without leading zeros Number after decimalpoint Command aD1 aMC 1 Response a lt value7 gt lt value8 gt lt CR gt lt LF gt atttn lt CR gt lt LF gt and after 9 seconds a lt CR gt lt LF gt atttnn lt CR gt lt LF gt atttnn lt CR gt lt LF gt atttn lt CR gt lt LF gt and after 9 seconds a lt CR gt lt LF gt a lt valuel gt lt value2 gt lt value3 gt lt value4 gt lt value5 gt lt value6 gt lt CR gt lt LF gt Description Send data Part 2 after aM aMC aC acc lt
7. gt 0 5 68 69 Snow Intensity Rain rate mm h Tab 4680 Tab 4677 light lt 0 5 71 71 moderate 0 5 4 0 72 73 heavy gt 4 0 73 75 Snow grains Intensity Rain rate mm h Tab 4680 Tab 4677 light lt 0 5 77 77 moderate 0 5 4 0 77 77 heavy gt 4 0 77 77 Freezing rain Intensity Rain rate mm h Tab 4680 Tab 4677 light lt 04 87 87 moderate gt 0 4 88 88 Hail Intensity Rain rate mm h Tab 4680 Tab 4677 light lt 7 5 89 89 moderate 27 5 89 90 D 2 Precipitation code according to the NWS and METAR SPECI w w Table 4678 The definitions of the precipitation codes below are listed according to the following tables NWS METAR SPECI w w Table 4678 No precipitation NWS Tab 4678 C NP Drizzle Intensity Rain rate mm h NWS Tab 4678 light lt 0 2 L DZ moderate 0 2 0 5 L DZ heavy 20 5 Le DZ Drizzle with rain Intensity Rain rate mm h NWS Tab 4678 light lt 0 2 RL RADZ moderate 0 2 0 5 RL RADZ heavy gt 0 5 RL RADZ Rain Intensity Rain rate mm h NWS Tab 4678 light lt 0 5 R RA moderate 0 5 7 5 R RA heavy 27 5 R RA Rain drizzle with snow Intensity Rain rate mm h NWS Tab 4678 light lt 0 5 RLS RASN moderate gt 0 5 RLS RASN heavy RLS RASN Snow Intensity Rain rate mm h NWS Tab 4678 light lt 0 5 S SN moderate 0 5 2 5 S SN heavy gt 2 5 5 SN Snow grains Intensity Rain rate mm h NWS Tab 4678 light lt 0 5 SG SG moderate 0 5 4 0 SG
8. 18 Connecting the OTT Parsivel to an OTT netDL IP datalogger via the SDI 12 interface Connect the OTT Parsivel as shown in Fig 10 to the OTT netDL using the SDI 12 interface OTT netDL Screw terminal strip C S el vO Qr Max cable length 100 m Remove bridge Terminal strip Power supply r 24V DC 100 W QIQIQ Q Protective housing version 8 i I 12 L OTT Parsivel 1 connection cable 0 0 2676222 om edo S 2 1 in a 9 SDI 12 interface activated Configuring the OTT netDL IP datalogger for SDI 12 communication To call the data from the OTT Parsivel with the OTT netDL and to store them a configuration must be set up in the OTT netDL Figure 11 shows an OTT netDL example configuration for communication via the SDI 12 interface See also the operating instructions for the OTT netDL IP datalogger Note that the mea surement cycle must be set up with the same value in all channels set up in the OTT Parsivel and that no instantaneous value can be stored in any of the channels of the OTT netDL configuration as false measurements can arise otherwise Fig 11 Configuration example of an OTT connected to an SDI 12 interface netDL1000 Parsivel 501 12 Interfaces 3 Devices 1 Internet Connections 1 Servers 1 Transmis
9. B SDI 12 GND 8 RS 485 A SDI 12 Data e OTT Parsivel connection cable Assignment is dependent on device configuration 10 Heating the OTT Parsivel sensor heads An automatic heating system prevents ice buildup on the sensor heads A temper ature sensor in the sensor head measures the temperature each second The heat ing system adjusts according to this value The purpose is to hold the sensor heads at a constant temperature of at least 10 C If the outside temperature drops below 10 C the heating current is switched on until 10 C is reached again in the sensor heads The heating control can be adapted to the respective climatic conditions Optimum heating output can be guaranteed with a supply voltage of 20 V DC Note Note that the heating of the sensor heads is set at the factory to 50 watt Enable the sensor heating in any case if the OTT Parsivel is used at temperatures below 4 C We recommend a power supply of 24V DC and a maximum heating cur rent of 2 A to provide for unlimited heating functionality in all climatic conditions You can set the heating performance with the OTT Parsivel software ASDO or alternatively using a terminal software Notes on setting these parameters can be found in Appendix A CS command set or in the OTT Parsivel software ASDO operating instructions 29 30 11 Operating the OTT Parsivel with a terminal software 11 1 Setting up communications between t
10. SG heavy 240 SG 5 Freezing rain Intensity Rain rate mm h NWS Tab 4678 light lt 0 4 SP 368 moderate gt 0 4 SP GS heavy SP GS Hail Intensity Rain rate mm h NWS Tab 4678 light 276 A GR moderate 27 5 A GR 49 Appendix E Declaration of conformity OTT Parsivel OTT See Konformitatserklarung Declaration of Conformity Declaration de Conformit Wir We Nous Anschrift Address Adresse OTT Hydromet GmbH LudwigstraBe 16 D 87437 Kempten erklaren dass das Produkt declare that the product declarons que le produit Bezeichnung Name Nom OTT Parsivel Artikel Nr Article No No d Article 70 210 001 3 0 mit den Anforderungen der Normen bereinstimmt fulfills the requirements of the standard satisfait aux exigences des normes EG 2004 108 EG Sicherheit von Laser Produkten Safety of laser products S curit de produits laser EN 60825 1 IEC 60825 1 Klasse class classe 1 class classe 1 mr po 2077 Ort und Datum der Ausstellung Kempten den Place and Date of Issue J 7 Lieu et date d tablissement C us Ze CG Name und Unterschrift des Befugten 4 Name and Signature of authorized person Nom et signature de la personne autoris e Dr Anton Felder CEO OTT Hydromet GmbH Gesch ftsf hrer Dr Ing Anton Felder J rg Mayer Ronald Marcel Peters Postfach 21 40 87411 Kempten Sitz der Ges Kempten Registergericht Kempten HRB 7687 USt ID Nr DE
11. of an electrically conducting material and is grounded The concrete foundation of the pedestal must have minimum dimensions of 40 x 40 x 80 cm Lx W x H Before the OTT Parsivel can be fastened to the pedestal the data transmission cable and power supply must be installed 6 1 Cable selection The electrical connection of the OTT Parsivel is made with an 8 core cable prepared with a plug at the factory accessory This connection cable can be supplied with a length of one or 13 meters The wire cross section is 0 25 mm heating power supply 0 75 mm If required you can extend the cable keeping to the following criteria Data transmission cable The OTT Parsivel has the following interfaces RS 485 SDI 12 Pulse output A total of two wires are available in the connection cable for the RS 485 and SDI 12 interfaces The assignment of these wires with the RS 485 or SDI 12 inter face is carried out by the OTT Parsivel user software ASDO or with a terminal program factory setting RS 485 interface We recommend that the data transmission cable has the following characteristics Twisted pair cable unshielded Usage length with RS 485 interface max 300 m Usage length with SDI 12 interface max 100 m Usage length with pulse output max 100 m Wire cross section from a cable length of 25 meter gt 0 5 mm below that 0 25 mm Power supply cable Power supply for electronics Wire cross section up to a cable length of
12. them a few turns Remove the insulation from one end of the grounding cable approximately 2 cm Insert the uninsulated end of the grounding cable between the two plates of the cable lug and retighten the two copper screws The other end of the cable must be properly grounded near the OTT Parsivel OTT Parsivel base Lock washers Flat washer Hex nut Allen key Ground hole Grub screw Cable lug Copper screws 11 12 Fig 4 Connecting the connection cable to the OTT Parsivel base 6 3 Installing the OTT Parsivel on a pedestal Proceed as follows to install the OTT Parsivel If necessary Attach the power supply protective housing version to the mount ing plate of the pedestal using the bolts and nuts supplied Feed the connection cable with the 8 pin plug from the power supply on the leg or from a control cabinet upwards through the pedestal Connect the plug to the socket in the base of the OTT Parsivel Tighten the cap nut for the plug by hand OTT Parsivel base 8 pin plug with cap nut 2 OTT Parsivel connection cable Slide the connected and grounded OTT Parsivel onto the pedestal Fig 5 Installing the OTT Parsivel on the pedestal Orient the OTT Parsivel such that the laser beam is perpendicular to the local main wind direction Evenly tighten the 6 M 8 x 16 grub screws or M 8 x 25 depen
13. value8 gt lt value9 gt lt CRC gt lt CR gt lt LF gt Command Response av atttn lt CR gt lt LF gt a0 lt CR gt lt LF gt Description Perform system test a Sensor address ttt Time in seconds until the sensor provides the result of the system test Response OTT Parsivel 000 n Number of measured values Response OTT Parsivel 0 a lt CR gt lt LF gt Service request Send data after av Sensor address 0 no system test performed More information on the SDI 12 basic commands can be found in the document SDI 12 A Serial Digital Interface Standard for Microprocessor Based Sensors Version 1 3 refer to website www sdi 12 org B 2 Advanced SDI 12 commands All advanced SDI 12 commands are preceded by which stands for OTT Using these commands the OTT Parsivel may be configured from the Transparent Mode of a datalogger Command Response Set read the unit for level pressure measured values aOSE lt value gt a lt value gt lt CR gt lt LF gt Description Activate SDI 12 mode a Sensor address value 0 SDI 12 mode deactivated factory setting 1 SDI 12 mode activated 45 Appendix C Classification of precipitation types After determining the volume equivalent diameter D and the particle speed V the OTT Parsivel subdivides the particles into appropriate classes The scale of this classification is smaller for small slow particles than for large and fast
14. 0 200 13 1 500 0 200 14 1 700 0 200 15 1 900 0 200 16 2 200 0 400 17 2 600 0 400 18 3 000 0 400 19 3 400 0 400 20 3 800 0 400 21 4 400 0 800 22 5 200 0 800 23 6 000 0 800 24 6 800 0 800 25 7 600 0 800 26 8 800 1 600 27 10 400 1 600 28 12 000 1 600 29 13 600 1 600 30 15 200 1 600 31 17 600 3 200 32 20 800 3 200 48 Appendix D Categorization of precipitation type by precipitation codes From the classification of precipitation particles the OTT Parsivel calculates the rain rate The type of precipitation is based on the number of particles within the measurement range and the precipitation code is determined from the precipita tion intensity R in mm h of an equivalent amount of water D 1 Precipitation code according to SYNOP The definitions of the precipitation codes below are listed according to the follow ing tables SYNOP ww Table 4680 SYNOP ww Table 4677 No precipitation Tab 4680 Tab 4677 00 00 Drizzle Intensity Rain rate mm h Tab 4680 Tab 4677 light lt 0 2 51 51 moderate 0 2 0 5 52 53 heavy gt 0 5 53 55 Drizzle with rain Intensity Rain rate mm h Tab 4680 Tab 4677 light lt 02 57 58 moderate 0 2 0 5 58 59 heavy gt 0 5 58 59 Intensity Rain rate mm h Tab 4680 Tab 4677 light lt 0 5 61 61 moderate 0 5 4 0 62 63 heavy gt 4 0 63 65 Rain drizzle with snow Intensity Rain rate mm h Tab 4680 Tab 4677 light lt 0 5 67 68 moderate
15. 25 meter 0 25 mm above that 0 5 mm Maximum cable length 250 meter when using an OTT power supply Power supply for heating Maximum resistance of cable 2 Q The length of the cable is dependent on the wire cross section Wire cross section max cable length for heating setting 50 W 100 W 0 75 mm 42m 21m 1 0 mm2 56 m 28 m 1 5 mm 84 m 42m 2 5 mm 140 m 70 m 4 0 mm 225m 112 5m See Chapter 10 Fig 3 Grounding the OTT Parsivel The individual parts to fasten the cable lug are included in the installation kit 6 2 Connecting ground to OTT Parsivel recommendation To ground the OTT Parsivel you will need the following parts from the installation set provided 1 hex key 4 mm 1 M 8 x 25 grub screw 2 lock washers 1 cable lug 1 flat washer 1 M8 hex nut Also you will need a grounding cable with a wire cross section of 16 mm In order to ground the OTT Parsivel2 proceed as follows Rotate the grub screw using the hex key from inside into the grounding hole see Fig 3 until the grub screw is flush with the inner wall inside the socket Place the lock washers cable lug and flat washer as shown in Fig 3 onto the grub screw from the outside Likewise screw the hex nut from outside onto the grub screw and tighten it Hold the grub screw from the inside using the hex key while doing so so that it does not rotate during tightening Loosen the two copper screws of the cable lug by rotating
16. 258 217 067 Steuer Nr 127 134 80337 LudwigstraBe 16 87437 Kempten WEEE Registrierungs Nummer 49590817 Tel 49 831 5617 0 Fax 449 831 56 17 209 Deutsche Bank AG M nchen BLZ 700 700 10 Kto Nr 409 0304 00 BIC DEUTDEMMXXX IBAN DE96 7007 0010 0409 0304 00 info ott com Es gelten unsere Allgemeinen Gesch ftsbedingungen siehe www ott com AGB www ott com All business transactions shall be subject to our General Terms and Conditions see www ott com GTC 50 Document number 70 210 001 B E 08 0115 OTT Sege doma OTT Hydromet GmbH Ludwigstrasse 16 87437 Kempten Germany Tel 49 831 5617 0 Fax 49 831 5617 209 info ott com www ott com
17. A parameter CR Set bus address for RS 485 bus mode Warning Changing the bus address can cause the loss of the connectivity Value range 0 9 Standard 0 CS T 12 00 00 lt CR gt Adjust time of day The time of day of the OTT Parsivel is set to the time of day of the PC CS D 01 01 2000 lt CR gt Adjust date The date of the OTT Parsivel is set to the calendar of the PC CS S E lt parameter gt lt CR gt Set SDI 12 mode Enable or disable the SDI 12 mode Value range Standard 0 Description 0 SDI 12 mode disabled 1 SDI 12 mode enabled CS S A parameter CR Set bus address for SDI 12 bus mode This command sets the bus address for the SDI 12 bus mode Value range 0 9 Standard 0 CS K xxxxxxxxxx lt CR gt Input station name This command allows a user specific station name to be used This name can encompass a maximum of 10 characters CS K PWS00001 lt CR gt Station name PWS00001 CS J xxxx lt CR gt Assign station ID This command assigns a 4 digit station ID CS M M lt parameter gt lt CR gt Select data telegram The data telegram can be input with the parameters O 1 Value range Dal Standard 0 Description 0 OTT telegram 1 User telegram CS M S lt parameter gt lt CR gt Set formatting string You can create a data telegram that is optimized according to your needs This command sets the formatting string The formatting stri
18. OTT Parsivel with the OTT netDL and to store them a configuration must be set up in the OTT netDL Figure 8 shows an OTT netDL example configuration for communication via the RS 485 interface See also the operating instructions for the OTT netDL IP datalogger Note that the measurement cycle must be set up with the same value in all chan nels set up in the OTT Parsivel 15 16 Fig 8 Configuration example of an OTT netDL connected to an RS 485 interface netDL1000 Parsivel R5485 Interfaces 3 Devices 1 Internet Connections 1 Servers 1 Transmissions 1 Maintenance windows 1 Time synchronisation Alarm management Display Observer Channel 0001 Intensity high resolution Meas cycle 00 01 00 E 1 2 Parsivel PWS Instantaneous value Store Channel 0002 Intensity low resolution Meas cycle 00 01 00 C 1 2 Parsivel PWS j Instantaneous value i Store Channel 0003 Rain amount since start of device Meas cycle 00 01 00 C 1 2 Parsivel PWS Instantaneous value Store Channel 0004 Weather code SYNOP wawa T ab 4680 Meas cycle 00 01 00 C 1 2 Parsivel PWS i Instantaneous value Store Channel 0005 Radar reflectivity Meas cycle 00 01 00 C 1 2 Parsivel PWS i Instantaneous value Store Channel 0006 MOR visibility in precipitation Meas cycle 00 01 00 E 1 2 Parsivel PWS In
19. Parsivel 1 Communication Mode activated Range of values 0 Factory setting 0 Description 0 Le For a description of the Parsivel telegram refer to the Operating instructions Present Weather Sensor Parsivel 70 200 005 B E 1 predecessor model of OTT Parsivel 41 Annex B SDI 12 commands and responses B 1 Basic commands All SDI 12 basic commands are implemented in the OTT Parsivel The following SDI 12 basic commands are relevant for the operation of the OTT Parsivel Command Response a a lt CR gt lt LF gt al al3cccccccommmmmm VVVXXXXXXXCR LF aAb b lt CR gt lt LF gt a lt CR gt lt LF gt aM atttn lt CR gt lt LF gt and after 9 seconds a lt CR gt lt LF gt a lt valuel gt lt value2 gt lt value3 gt lt value4 gt lt value5 gt lt value6 gt lt CR gt lt LF gt 42 Description Acknowledgement active a Sensor address factory setting O Send identification a Sensor address 13 SDI 12 protocol version Manufacturer s identification company name mmmmmm Sensor identification vvv Sensor version firmware xxxxxx Serial number Response OTT Parsivel 013OTT PARS_2202123456 Change sensor address a Old sensor address b New sensor address Query sensor address a Sensor address Start measurement a Sensor address ttt Time in seconds until the sensor has determined the measurement result
20. Power supply voltage A 00 0 0 0 200 18 Sensor status 1 0 0 3 see Chapt 12 1 19 Date time measuring start 19 00 00 0000 00 00 00 DD MM YYYY hh mm ss 20 Sensor time 8 00 00 00 hh mm ss 21 Sensor date 10 00 00 0000 DD MM YYYY 22 Station name 10 XXXXXXXXXX 23 Station number A XXXX 24 Rain amount absolute 32 bit 7 000 000 0 000 999 999 mm 25 Error code 3 000 26 Temperature PCB 3 000 99 100 GE 27 Temperature in the right sensor head 3 000 99 100 28 Temperature in the left sensor head 3 000 99 100 30 Rain intensity 16 bit 30 000 mm h 6 00 000 0 000 30 000 mm h 31 Rain intensity 16 bit max 1200 0 mm h 6 0000 0 0 0 1200 0 mm h 32 Rain amount accmulated 16 bit 7 0000 00 0 00 0300 00 mm 33 Radar reflectivity 16 bit 5 00 00 9 99 99 99 dBz 34 Kinetic energy 7 000 000 0 000 999 999 J m h 35 Snow intensity 7 0000 00 0 00 9999 99 mm h 90 Field N d 223 00 0005 9 999 99 999 ka 1 m mm 1 Value average volume equivalent diameter ved of the 1 class 91 Field v d 223 00 0005 0 000 99 999 m s 1 Value average rate of fall rof of the 1 class 93 Raw data 4095 000S 052999 1 1 Value number of particles 1 ved 1 rof 32 Value number of particles 32 ved 1 rof 33 Value number of particles 1 ved 2 rof 64 Value number of particles 32 ved 2 rof 65 Value depending on which datalogger is used the measure
21. R gt Output all measurement values in accordance with the table in Chapter 11 2 This data sequence is necessary for the import into the OTT Parsivel software ASDO CS R lt CR gt Repeat polling mode OTT Parsivel outputs the data telegram no later than 500 ms after the confirma tion of the command CS R xx lt CR gt Output individual measurements After confirmation of the command the indicated measurement is output accord ing to the table in Chapter 11 2 Measured value numbers CS C R lt parameter gt lt CR gt Adjust baudrate Warning Changing the baudrate can lead to loss of the connectivity The baudrate can be adjusted from 9600 115200 The baudrate is set at 19200 at the factory 1200 baud 8 N 1 2400 baud 8 N 1 4800 baud 8 N 1 9600 baud 8 N 1 19200 baud 8 N 1 38400 baud 8 N 1 57600 baud 8 N 1 4 CS C R lt CR gt Query baudrate With this command the current baudrate setting can be queried CS C B lt parameter gt lt CR gt Setting up RS 485 bus mode Warning Enabling the bus mode can cause the loss of the connectivity With this command it is possible to operate more than one sensor through one RS 485 interface The sensors are than operated via the bus address Value range 0 1 Standard 0 Description 0 RS 485 bus mode disabled 1 RS 485 bus mode enabled Address query lt CR gt Answer lt Address gt lt CR gt lt LF gt 39 40 CS C
22. anent connection between your PC and the OTT Parsivel When using the USB interface the OTT Parsivel does not send any data via the SDI 12 RS 485 interface or the pulse output Fig 17 Connecting power supply control cabinet version to the OTT Parsivel Install the power supply in the control cabinet on a standard top hat rail For optimum running of the cable in the area where the cable enters the control cabinet a terminal strip should be used When using the RS 485 interface the total cable length between the OTT Parsivel and the datalogger may be a maximum of 20 meters Otherwise a 120 Ohm terminator is necessary on the OTT Parsivel between the yellow and green wires 9 Connecting the OTT Parsivel to a power supply OTT Hydromet offers two power supplies accessory for the power source Power supply 24 V DC 100 W protective housing version Power supply 24 V DC 100 W control cabinet version The connection of the power supply is made with an 8 core prepared connection cable accessory If required you can extend the cable More information on this can be found in Chapter 6 1 Cable selection Danger of electric shock Only connect power supplies if you have the required electrical knowledge For all work on the power supply Always ensure the mains cables are off circuit and secure them against switching back on Connect the power supply to the OTT Parsivel as shown in Figures 17 or 18
23. d value number must be selected with the corresponding number of bits S Separator Note Other values in the telegram which are not included in this list are intended exclusively for service purposes Please ignore them 31 32 11 3 Defining the formatting string There are various strings available to tailor the format of the existing data protocol to your individual requirements These must be individually assigned to each mea surement number in the data telegram Formatting control codes String Meaning n Line feed r Return s Start transmission e End transmission Formatting individual measured values String Meaning 04 Output measured value No 4 Formatting fields String Meaning 90 Output data field no 90 with as a separator Other signs can be used as well as a separator 11 4 OTT telegram The following telegram configuration has been preset at the factory 13 01 02 03 07 08 34 1 2 10 11 18 r n According to this configuration the measurement values are displayed as in the following example 200248 000 000 0000 00 00 9 999 9999 025 15759 00000 0 According to the table in Chapter 11 2 the data protocol is thus defined as follows Meas value No Meas value Definition 13 200248 Sensor serial number 01 000 000 Rain intensity 02 0000 00 Rain amount since start of device 03 00 Weather code according to SYNOP w w see Appendix D Categorization of precipitati
24. ding on the diameter of the pedestal using the 4 mm hex key provided installation set so that the sensor heads are horizontal as much as possible Sensor head 13 14 Fig 6 Wiring assignment of the connection cable 7 Connecting the OTT Parsivel to a datalogger The OTT Parsivel can be connected to the following dataloggers OTT netDL with RS 485 interface OTT netDL with SDI 12 interface Any datalogger with an SDI 12 interface Datalogger with pulse input The connection to a datalogger is made with a prepared 8 core connection cable accessory This cable also has 2 wires for the electrical power supply for the electronics and two for the heating of the Parsivel LIT II Connection cable OTT Parsivel Color Assignment red heating supply mm blue heating supply GND brown electronics supply white electronics supply GND gray pulse output pink pulse output lm yellow 5 485 B SDI 12 GND green RS 485 A SDI 12 Data The green and yellow cable is assigned either to the RS 485 or SDI 12 interface The selection is carried out during setup via the OTT Parsivel user software ASDO or a terminal program Both of these wires are assigned to the RS 485 interface at the factory Parallel operation of the pulse output with either the RS 485 or the SDI 12 inter face is possible to a limited extent With this operatin
25. e B 3 m 1 OTT Parsivel PC software ASDO basic version 1 set of operating instructions 2 Order numbers OTT Parsivel Accessories Spare parts Laser optical disdrometer Connection cable assembled 8 core wire cross section 0 25 0 75 mm one end prepared with plug one open cable end insulation removed and provided with end sleeves Length 1 m 13 m available on request according to customer requirements Power supply 24 V DC 100 W control cabinet version Protection class IP 20 for top hat rail installation TS 35 Input voltage 100 240 V AC Power supply 24 V DC 100 W protective housing version Protection class IP 65 in aluminum protective housing Input voltage 100 240 V AC Interface converter RS 485 USB galvanically isolated electrical supply via USB interface RS 485 RS 232 galvanically isolated external electrical supply 12 24 V required Pedestal 2 with bottom plate for attachment to a concrete base with mounting plate for mains adapter protective housing version Laser strip installation height 1 m length 0 53 m Laser strip installation height 2 m length 1 53 m Laser strip installation height 3 m length 2 53 m Attachment set for pedestal for attachment of the pedestal on a concrete base 4x anchor rods 4x anchor bolt glue cartridges OTT Parsivel PC software ASDO full version Spla
26. e menu bar The Send file window opens Fig 19 Send file window Ad xl Folder CH Eilename C 100P4RSIVEL2 BIN Browse Protocol Close Cancel Select the file IOP BIN under Filename using the Browse button you had previously stored this file on your PC Select the Xmodem protocol type from the Protocol selection window Confirm your input with Send The Xmodem file send for OTT Parsivel2 window opens Fig 20 Xmodem file send for Xmodem file send for Parsivel OTT Parsivel2 window Sending C O0PARSIVEL2 BIN Packet es Error checking Retries o Total retries 10 Last error File 10K of 27K Elapsed 00 00 09 Remaining 00 00 15 Throughput fi 109 cps cps bps 33 34 The data transfer runs and the window closes automatically after the data transfer has finished After the window has closed input the command RUN CR to start OTT Parsivel2 The firmware was successfully updated 12 Maintenance Danger of injury to eyes When working on the sensor there is a danger of injury to the eyes due to the laser beam Never look directly into the laser During all work on the sensor it must be switched off If this is not possible ensure protective goggles are worn Never open the sensor modules Observe the safety instructions in Chapter 4 12 1 Cleaning the laser s protective glass Depending on the time of year and locat
27. er it is necessary to configure the OTT Parsivel before its first use using the OTT Parsivel software ASDO Basic or a terminal pro gram To do so the OTT Parsivel is temporarily connected to a PC with a USB interface Please note The OTT Parsivel2 is not supplied with power via the USB inter face As in normal measurement operation the power supply is from an addition ally connected power supply brown and white wire of the connection cable Connecting the OTT Parsivel to a PC via USB interface Requirements USB interface drivers are installed see below OTT Parsivel base Se ooo USB service interface 25 26 Remove the cover of the OTT Parsivel base Allen key 4 mm Connect the USB cable to a USB interface of the PC USB plug type AJ Connect the USB cable to service interface of the OTT Parsivel USB plug type B see Fig 16 Start the OTT Parsivel Software ASDO Basic or terminalsoftware on your PC and make the required settings After completion disconnect the connection between PC and OTT Parsivel Replace the cover on the OTT Parsivel base ensure that you do not kink or jam the cable in the process If required Installing the USB interface driver For establishing a communication link over the USB interface the PC requ
28. ff on off Connect the OTT Parsivel as follows Interface converter Adam 4520 RS 485 RS 232 o 5 A Q O al oe i Max cable length 300 m D 120 Max cable length lt 20 m Remove bridge Terminal strip saa Power supply EE 24 V DC 100 W Protective housing version Z 8 L I 2 I OTT Parsivel I connection cable 0 0 da 4 236553 g 3 m 5 2 2 x 23 Fig 15 Connecting the OTT Parsivel to an RS 485 USB interface converter The figure shows the example connection using the terminal strip of an OTT power supply accessory In addition the four wires of the voltage supply heating red blue electronics brown white must be connected to the power supply see Chapter 9 Likewise connect the two wires of the pulse output to the terminal strip For this application however they are not connected further The power supply for the interface converter comes from the USB interface 24 8 3 Connecting the OTT Parsivel to the RS 485 USB interface converter The RS 485 USB interface converter accessory can be set for 2 wire communi cation as well as 4 wire communication Setting the dip switches at the interface converter Set the external dip switches at the interface converter as follows Operating mode 1 RS 485 2 wire without echo automatic control 2 3 4
29. g type the OTT Parsivel does not send the pulse at intervals of one minute but at the time interval set for sample intervals on the datalogger or PC Fig 7 Connecting the OTT Parsivel to the OTT netDL via RS 485 interface The figure shows the example connection using the terminal strip of an OTT power supply accessory In addition the four wires of the voltage supply heating red blue electronics brown white must be connected to the power supply see Chapter 9 Likewise connect the two wires of the pulse output to the terminal strip For this application however they are not connected further 7 1 Connecting the OTT Parsivel to an OTT netDL IP datalogger using the RS 485 interface The measured values determined by the OTT Parsivel can be called and stored via the OTT netDL IP datalogger To do so connect the OTT Parsivel as shown in Fig 7 to the OTT netDL using the RS 485 interface OTT netDL Screw terminal strip C 2 sO gt Max cable length 300 m Cable length lt 20 m Remove bridge ORIO Terminal strip gt s Power supply 24V DC 100W Protective housing version a 8 L I 2 I OTT Parsivel I connection cable 0 0 1 m 4 POg iiGS 3 e PRA F i Tb S 2 2 I Configuring the OTT netDL IP datalogger for RS 485 communication To call the data from the
30. he OTT Parsivel and the terminal program The OTT Parsivel provides a USB interface for communication This serial inter face can be operated at various baudrates Communication with the sensor is pos sible with any standard terminal software Below operation using the terminal software program Hyper Terminal is described since this is a part of Microsoft Windows scope of delivery In order to operate OTT Parsivel using Hyper Terminal proceed as follows Connect the OTT Parsivel to your PC as described in Chapter 8 Connecting the OTT Parsivel to a PC Start Hyper Terminal After starting Hyper Terminal the window Connection Description opens Enter a name for the connection select an arbitrary symbol and confirm your input with OK The next window Connect to now opens Select the COM interface of your PC and confirm your input with OK The next window that opens is Properties of COM No Enter the following connection settings Bits per second 19200 Databits 8 Parity none Stopbits 1 Flow control none After a successful connection with the OTT Parsivel2 is made it sends a input prompt after pressing the enter key as an BOOTLOADER PARSIVEL after approx 10 seconds the following message appears PARSIVEL 2 OTT HYDROMET GmbH Copyright C 2013 Version V2 02 3 Approximately 60 seconds after starting to establish the connection the OTT Parsivel starts measuring automatically and ou
31. ion air pollution can lead to contamina tion of the laser s protective glass This can result in a drop in the sensor dynam ics The last value Sensor status of the OTT telegram provides a reference con cerning the current state of the optics wherein the following error codes are reported 0 Everything OK 1 Laser protective glass is dirty but measurements are still possible 2 Laser protective glass is dirty partially covered No further usable measurements are possible 3 Laser damaged It is a good idea to clean the laser optics beginning at Status 1 OTT Hydromet recommends that the laser s protective glass be cleaned at least semiannually regardless of the messages To clean the laser s protective glass proceed as follows Clean the laser s protective glass on both sensor heads from the outside with a soft cloth 12 2 Keeping the light pathway open Please follow Safety Instructions see chapter 4 when keeping the light pathway open At regular intervals remove all impediments such as leaves branches or spider webs that are in the way of the light pathway 35 36 Abb 21 Splash protection unit 12 3 Cleaning the splash protection unit Danger of injury When working on the splash protection unit there is a danger of injury from sharp edges Take care when working on the splash protection unit Wear gloves as necessary Danger of damaging the device The splash protection unit can bend easi
32. ires a dedicated USB interface driver This USB interface driver must be installed when the communication link is established for the first time You may use the USB interface driver on any current standard PC that is fitted with a USB interface and on which a Microsoft 7 or higher operating system is run The procedure described here is based on the Microsoft 7 operating system With minor changes it applies to the other Windows operating system versions as well How to install the USB interface driver Log on to the PC with administrator rights Connect the OTT Parsivel to a USB interface of the PC see above gt the PC detects the new hardware and displays the message Found New Hardware OTT Parsivel2 the Found New Hardware Wizard opens Select No not this time Select Next Select Install from a list or specific location Advanced Select Next Insert the OTT Parsivel Software CD ROM into PC drive Select Search for the best driver in these locations and Search removable media CD ROM Select Next The wizard will install the USB interface driver onto the PC After completion of the installation process the following message will appear The wizard has finished installing the software for OTT PARSIVEL Select Next Now a communication link via the USB interface may be estab lished in the notification area of the taskbar Note The USB interface cannot be used as a perm
33. l properly after taking out of service Observe the regulations valid in your country for the disposal of electronic devices Never put the OTT Parsivel2 into the normal household waste Used materials see Chapter 15 Technical Data 37 15 Technical data Optical sensor laser diode Wavelength Output power Laser class Beam size W x D Measurement surface Measuring range Particle size of liquid precipitation Particle size of solid precipitation Particle speed Design Weather code Visibility in precipitation Rain rate Minimum intensity Maximum intensity Accuracy De icing protection Power supply Current drawn Electronics Heating Interfaces Electromagnetic tolerance Lightening protection Material Weight Temperature range Protection Size H x W x D 780 nm 0 5 mW 1 21 CFR 1040 10 and 1040 11 1 IEC EN 60825 1 A2 2001 180 x 30 mm 54 cm recognition of edge events 0 2 5 mm 0 2 25 mm 0 2 20 m s 32 precipitation size classes 32 speed classes Radar reflectivity Z kinetic energy Outputs SYNOP w w Table 4680 SYNOP ww Table 4677 NWS METAR SPECI w w Table 4678 differentiation of the precipitation types drizzle rain hail snow gt 97 compared to a weather observer Measurement range MOR 100 5 000 m 0 001 mm h drizzle rain 1 200 mm h 5 liquid 20 solid 1 Microprocessor controlled heating 10 28 V DC reverse polarity pr
34. ly Clean the splash protection unit on a level surface A splash protector is attached to each sensor head of the OTT Parsivel The splash protector has many small holes that break up incident raindrops so that no secondary spectra are detected in the laser beam due to splashing As soon as the holes are plugged by bird droppings pollen or similar material the drops can no longer be broken up and the splash protector has to be cleaned Splash protection unit Allen screw Clean the splash protector as follows Loosen the four hex screws of the respective splash protector using an M4 hex key and remove the splash protector Clean the splash protector using a brush and commercially available household cleanser on both sides under running water Reinstall the splash protector onto the respective sensor head using the hex screws If the splash protector can no longer be cleaned or if it is defective it can be pur chased as a replacement part from OTT Hydromet see Chapter 2 Part numbers 13 Functional disruptions and remedies 13 1 OTT Parsivel does not start Check the polarity of the power supply the A B connections of the RS 485 cables and the baud rate see Ch 6 and 7 If this does not work start any terminal software program on your PC e g Hyper Terminal and try to make a connection to OTT Parsivel see Ch 11 Operating the OTT ParsiveP with a terminal software The OTT Parsivel should send a
35. ment a Sensor address ttt Time in seconds until the sensor has determined the measurement result Response OTT Parsivel 009 n Number of measured values Response OTT Parsivel 8 a lt CR gt lt LF gt Service request Send data Part 1 after aM1 aMC1 aC1 1 a Sensor address valuel Kinetic energy J m h Measured value format pbbb eee Range 0 000 999 999 J m h value2 Snow intensity mm h Measured value format pbbbb ee Range 40 00 9999 99 mm h value3 Weather code according to SYNOP ww Table 4677 Measured value format pbb 1 Range 400 499 value4 Temperature PCB C Measured value format pbbb Range 99 100 C Continued on page 44 43 Command aD1 aMC1 acl 44 Response a lt value7 gt lt value 8 gt lt value9 gt lt CR gt lt LF gt atttn lt CR gt lt LF gt and after 9 seconds a lt CR gt lt LF gt atttnn lt CR gt lt LF gt atttnn lt CR gt lt LF gt Description lt value5 gt Temperature in the right sensorhead C Measured value format pbbb Range 99 100 C lt value6 gt Temperature in the left sensorhead C Measured value format pbbb Range 99 100 C P Sign b Number before decimal point Output without leading zeros e Number after decimal point Send data Part 2 after aM1 aMC1 aC1 aCC1 lt value7 gt Sensor status 1
36. must be connected to the power supply see Chapter 9 Max cable length 300 m Likewise connect the two wires of the pulse output to the terminal strip For this application however they are not connected further D R 1200 Cable length lt 20 m Remove bridge ORO Terminal strip ll Power supply e 24V DC 100 W QIQ Q Protective housing version Z 8 L I 2 OTT Parsivel connection cable L 2 9 ty m amp 2626223 2 5 ki S 2 2 I 22 Fig 14 Connecting the OTT Parsivel to an ADAM 4520 RS 485 RS 232 interface converter The figure shows the example connection using the terminal strip of an OTT power supply accessory In addition the four wires of the voltage supply heating red blue electronics brown white must be connected to the power supply see Chapter 9 Likewise connect the two wires of the pulse output to the terminal strip For this application however they are not connected further 8 2 Connecting the OTT Parsivel to the ADAM 4520 RS 485 RS 232 interface converter The ADAM 4520 RS 485 RS 232 interface converter accessory can only be set for 2 wire communication Setting the dip switches at the interface converter Set the internal dip switches at the interface converter as follows Switch 1 1 2 10 bits on off Switch 2 1 2 3 4 5 6 7 8 9 10 115 2 Kbps off off off off off off off o
37. ng is placed in the lt para meter gt spot see also Chapter 11 3 Defining the formatting string CS Z 1 lt CR gt Restart sensor reset the rain amount CS L lt CR gt Output current configuration CS 2 lt CR gt This command outputs the command list CS H M lt parameter gt lt CR gt This command adjusts the operating mode of the heating system Value range 0 3 Standard 1 Description 0 OFF Automatic 50 W 2 Automatic 100 W 321 100W CS H T parameter CR Set minimum temperature of the sensor heater This command sets the minimum temperature to which the sensor is heated Value range 40 85 C Standard 10 CS U 01 01 2011 10 55 11 CR Set real time clock This command sets the real time clock of the OTT 2 CS U lt CR gt Read out real time clock With this command the current date and time of the OTT Parsivel2 is read out Response 01 01 2011 10 55 11 example CS D lt parameter gt lt CR gt Activate deactivate Parsivel Communication Mode With this command the OTT Parsivel telegram see Chapter 11 2 and 11 4 is set to the format of the previous generation of Parsivel This is required if you are using the OTT Parsivel in a measuring network together with one several Parsivel 1 unit s and the telegram s of all units has have to be identical 1 OTT Parsivel2 telegram Parsivel 1 Communication Mode deactivated
38. on type by precipitation codes 07 9 999 Radar reflectivity 08 9999 MOR visibility in the precipitation 34 000 00 Kinetic energy 12 025 Temperature in the sensor 10 15759 Signal amplitude of the laser strip 11 00000 Number of detected particles 18 0 Sensor status 11 5 Updating OTT Parsivel firmware OTT Hydromet provides the latest update versions to OTT software on its internet site at www ott com under the rubric Software updates The following file is needed to update the OTT Parsivel firmware OP BIN where represents the respective version number To update the OTT Parsivel firmware proceed as follows Connect your PC to the OTT Parsivel via the corresponding interface converter as described in Chapter 8 Load the newest update of the OTT Parsivel firmware onto your computer from the OTT home page Start a terminal software program on your PC and make the appropriate set tings as described in Chapter 11 1 Setting up communications between the OTT Parsivel and the terminal software After OTT Parsivel has started measurement operations and has issued a data telegram reset the OTT Parsivel firmware with the command CS Z 1 CR OTT Parsivel answers with Bootloader OTT Parsivel2 Press CR repeatedly directly after the message OTT Parsivel replies with 2 Input the command sup lt CR gt OTT Parsivel answers with Start upload Firmware with XMODEM CRC Select Transfer Send file in th
39. otection Optimum heating output of the sensor head heating system can be guaranteed with a power supply voltage of at least 20 V DC 65 mA at 24 V DC 2 4 A 12 24 V DCH RS 485 EIA 485 1 200 57 600 Baud half duplex 2 wire SDI 12 USB OTT Parsivel has an output relay for pulse output for precipitation in 0 1 mm pulse with max 2 Hz pulse rate fulfills EN 61000 4 2 to EN 61000 4 6 10 V m 2 kV for EMC requirements CE compliant integrated powder coated aluminum housing max 6 4 kg 40 70 C 100 relative humidity IP 65 resistant to salt spray 670 x 600 x 114 mm 1 Under laboratory conditions and statistically correlated by OTT calibration system with reference particle calibration of 0 5 1 0 2 0 and 4 0 mm 2 Power output gt 100 W necessary Appendix A CS command set CS F 1 lt CR gt With this command all factory settings can be recreated CS I parameter CR Adjust sample interval and start transfer In automatic mode the sample interval can be adjusted in seconds with this com mand After confirmation of the command the first data set is output Value range 0 10 3600 Standard 30 If the value O is entered for the sample interval the Polling mode is enabled CS P lt CR gt Enabling polling mode OTT Parsivel issues a data telegram no later than 500 ms after receiving the com mand This command disables the interval controlled telegram CS PA lt C
40. particles C 1 Class limits The measured particles are subdivided into D and V classes in a two dimensional field wherein there are 32 different D and V classes so that there are a total of 32 x 32 1024 classes Classification according to volume equivalent diameter Class number Mid value of class mm Class spread mm 0 062 0 125 2 0 187 0 125 3 0 312 0 125 4 0 437 0 125 5 0 562 0 125 6 0 687 0 125 7 0 812 0 125 8 0 937 0 125 9 1 062 0 125 10 1 187 0 125 11 1 375 0 250 12 1 625 0 250 13 1 875 0 250 14 2 125 0 250 15 2 375 0 250 16 2 750 0 500 17 3 250 0 500 18 3 750 0 500 19 4 250 0 500 20 4 750 0 500 21 5 500 1 000 22 6 500 1 000 23 7 500 1 000 24 8 500 1 000 25 9 500 1 000 26 11 000 2 000 27 13 000 2 000 28 15 000 2 000 29 17 000 2 000 30 19 000 2 000 31 21 500 3 000 32 24 500 3 000 Note Class 1 and class 2 are limits and are not evaluated at the current time in measurements using the OTT Parsivel since they are outside the measurement range of the device Classification according to speed Class number Mid value of class m s Class spread m s 0 050 0 100 2 0 150 0 100 3 0 250 0 100 4 0 350 0 100 5 0 450 0 100 6 0 550 0 100 7 0 650 0 100 8 0 750 0 100 9 0 850 0 100 10 0 950 0 100 11 1 100 0 200 12 1 300
41. rs 11 3 Defining the formating string 11 4 OTT telegram 11 5 Updating OTT Parsivel firmware Maintenance 12 1 Cleaning the laser s protective glass 12 2 Keeping the light pathway open 12 3 Cleaning the splash protection unit Functional disruptions and remedies 13 1 OTT Parsivel does not start 13 2 Disruptions due to convection and vibrations Note about the disposal of old units 15 Technical data 37 37 37 37 38 Appendix A CS command set Appendix B SDI 12 commands and responses B 1 Basic commands B 2 Advanced SDI 12 commands Appendix C Classification of precipitation types C 1 Class limits Appendix D Categorization of precipitation type by precipitation codes D 1 SYNOP precipitation code D 2 NWS and METAR SPECI ww precipitation code Table 4678 Appendix E Declaration of conformity 39 42 42 45 46 46 48 48 49 50 1 Scope of supply OTT Parsivel 1 laser optical disdrometer consisting of two sensor heads with splash protec tion unit grid tunnel housing with 30 mm wide and 180 mm long light strip base holder with integrated electronics and 8 pin panel jack for connecting the supply voltage and electrical ports installation set consisting of 1 x cable lug for grounding 1 x flat washer 6 x grub screws M 8 x 16 mm 7 x grub screws M 8 x 25 mm 1 x hex nut M 8 2 x lock washers 1 x Allen key 4 mm USB connection cable USB connector type A to USB typ
42. sh protection unit grid 1 piece 70 210 001 3 0 70 210 409 4 1 65 030 003 9 2 97 850 029 9 5 97 961 091 9 5 97 970 041 9 5 70 210 420 3 1 70 210 421 3 1 70 210 422 3 1 99 020 050 9 2 56 551 001 9 7 70 210 410 3 1 3 OIT Parsivel factory settings The OTT Parsivel is a flexibly configurable device with respect to interface activa tion and parameters and the heating setting and is supplied with the following factory settings Operating mode RS 485 2 wire Baudrate RS 485 19 200 baud RS 485 bus mode disabled Bus address RS 485 0 SDI 12 interface disabled SDI 12 bus address 0 Pulse output 0 1 mm enabled Heating mode mode 1 50 W Data telegram OTT telegram see Chapter 11 4 Measurement interval 60 s The parameters can be set with the OTT Parsivel software ASDO or alternatively using a terminal software Notes on setting these parameters can be found in Appendix A CS command set or in the OTT Parsivel software ASDO Opera ting instructions The green and yellow wires in the connection cable are configured as an RS 485 interafce alternatively SDI 12 4 Safety information These operating instructions contain basic instructions that must be followed during installation operation and maintenance Therefore it is absolutely nec essary that they be read by the assembler and by the responsible technical per sonnel operator prior to installation and startup These operating in
43. sions 1 Maintenance windows 1 Time synchronisation Alarm management Display Observer Channel 0001 Intensity Meas cycle 00 01 00 E 34 501 12 Master Y02 V03 V04 V05 V06 V07 V08 Channel 0002 Rain amount since start of device Meas cycle 00 01 00 V02 Virtual Sensor Channel 0003 Weather code SYNOP wawa Tab 4680 Meas cycle 00 01 00 V03 Virtual Sensor Channel 0004 Radar reflectivity Meas cycle 00 01 00 V04 Virtual Sensor Channel 0005 MOR visibility in precipitation Meas cycle 00 01 00 V05 Virtual Sensor Channel 0006 Sample interval Meas cycle 00 01 00 V06 Virtual Sensor Channel 0007 Laserdynamic Meas cycle 00 01 00 i 07 Virtual Sensor Store Channel 0008 Particle Meas cycle 00 01 00 V08 Virtual Sensor 19 7 3 Connecting the OTT Parsivel to a datalogger with pulse input Pulse input The rainfall amount can be detected in a manner similar to rain collectors accord ing to the tipping bucket principle using pulse input to a datalogger For the pulse output of the OTT Parsivel the following values apply Pulse output duration 250 25 ms Pulse voltage O V max 100 mA Open circuit voltage 5 28 V Resolution 0 1 mm pulse output frequency 2 Hz 0 01 mm pulse output frequency 20 Hz You can set the resolution with the OTT Parsivel software ASDO or alterna
44. stantaneous value Channel 0007 Sensor status Meas cycle 00 01 00 i C 1 2 Parsivel PWS Instantaneous value Store Channel 0008 Signal amplitude of the laser strip Meas cycle 00 01 00 E 1 2 Parsivel PWS Instantaneous value Store Channel 0009 Temperature in the sensor Meas cycle 00 01 00 E 1 2 Parsivel PWS Instantaneous value Store Fig 9 Connecting the OTT Parsivel to a datalogger via the SDI 12 interface The figure shows the example connection using the terminal strip of an OTT power supply accessory In addition the four wires of the voltage supply heating red blue electronics brown white must be connected to the power supply see Chapter 9 Likewise connect the two wires of the pulse output to the terminal strip For this application however they are not connected further 7 2 Connecting the OTT Parsivel to a datalogger via an SDI 12 interface If a datalogger is used that is connected via an SDI 12 interface the datalogger functions as a master and specifies the measurement time and sample interval of the OTT Parsivel The measurement time must be gt 1 min in this case in order for the OTT Parsivel to collect sufficient data during winter operation as well to allow for the precise assignment of precipitation type To make the OTT Parsivel capable of communicating for an SDI 12 interface the OTT Parsivel must first be connec
45. status message of ok in response to the CS lt CR gt command If this does not happen contact OTT Hydroservice 13 2 Disruptions due to convection and vibrations In rare cases intense sun can affect the sensor due to the high sensitivity of the device this is caused by refractive index fluctuations mirage effects in connection with wind The same applies to vibrations Most of these types of disruptions are recognized and removed through formal analysis of the signals Nevertheless some disruption signals cannot be differentiated from the signals of small parti cles Further examinations of the particle collective over the respective reporting period help to prevent precipitation reports during good weather for the most part 14 Note about the disposal of old units Within the member countries of the European Union In accordance with the European Union guideline 2002 96 EC OTT takes back old devices within the member countries of the European Union and disposes of them in an appropriate way The devices concerned by this are marked with the symbol shown aside WEEE registration number 495908 17 For further information on the return procedure please contact your ocal sales contact You will find the addresses of all sales partners in the internet on www ott com Please take into consideration also the national implementation of the EU guideline 2002 96 EC of your country For all other countries Dispose of the OTT Parsive
46. structions must be accessible at the point of use of the mea surement device Personnel responsible for installation operation and maintenance must have the appropriate qualifications for this work Responsibilities competency and the monitoring of personnel must be closely controlled by the owner If person nel do not have the required knowledge it must be provided through training and instruction If necessary OTT Hyrdomet can provided this service on a con tractual basis for the owner Non adherence to these safety instructions can have dangerous consequences for persons as well as for the measurement device Non adherence to these safety instructions can result in the loss of any indem nity claims Please adhere to the safety instructions listed in these operating instructions to all existing national accident prevention regulations and to any internal work operating and safety rules as set forth by the owner The operating safety of the delivered measuring device is only guaranteed when it is used properly Retrofitting or changing the measuring device is only allowed if authorized by the manufacturer To ensure safety buy only original replacement parts and accessories autho rized by the manufacturer Use of other parts can void liability for any conse quences arising therefrom The OTT Parsivel is a class 1 laser product which complies with IEC EN 60825 1 A2 2001 Wavelength 780 nm output max 0 5 mW Do not stare into
47. t precipitation spectrograph precipitation spectrograph Y H total height Disdrometer General Present Weather Sensor OTT Parsivel Outputs RS 485 801 12 pulse T 1 Chapter 8 Chapter 7 1 Chapter 7 2 Chapter 7 3 rico M Vc eee LECHEN ee eer Pog ae nee E ee td ey 1 EE ERES 1 1 I i i i i i i i i Y Y Cable Cable Cable Pulse max 300 m max 300m max 100m RS 485 RS 485 SDI 12 Interface converter RS 485 2 wire m RS 232 USB RS 485 netDL 1000 801 12 Datalogger ASDO full version OTT netDL 500 Datalogger with pulse input p OTT Hydras 3 1m Chapter 9 Cable length Supply voltage see Ch 6 1 Power supply Fig 2 Connection options for the OTT Parsivel 10 6 Installing the OTT Parsivel Please follow Safety instructions see chapter 4 when installing the OTT Parsivel It is of critical importance to the quality of the measurements that the setup loca tion be selected carefully Here wind and vibrations must be minimized see chap ter 13 2 Disruptions due to convection and vibrations If the protection against these influences is not sufficient virtual drops can be detected Prerequisites The OTT Parsivel is mounted on a pedestal The pedestal must have the following specifications Pedestal diameter 50 62 mm Pedestal consists
48. ted to a PC via the USB interface The SDI 12 interface can be switched to active through the Parsivel user software ASDO or using a terminal program and the command CS S E 1 lt CR gt see operating instructions for OTT Parsivel user software ASDO and Chapter 11 Operating the OTT Parsivel with a terminal software For a detailed description of SDI 12 commands refer to Annex B Connecting the OTT Parsivel to a datalogger using an SDI 12 interface general Connect the OTT Parsivel to any datalogger as shown in Fig 10 via the SDI 12 interface Datalogger with SDI 12 interface GND Data Max cable length 100 m Remove bridge IRO 2 Terminal strip le Power supply EEE 24V DC 100 W Protective housing version y 8 L D 2 I OTT Parsivel connection cable Q 01 5 626232 D PRIE R amp v a a SDI 12 interface activated 17 Fig 10 Connecting the OTT Parsivel to an OTT netDL via the SDI 12 interface The figure shows the example connection using the terminal strip of an OTT power supply accessory In addition the four wires of the voltage supply heating red blue electronics brown white must be connected to the power supply see Chapter 9 Likewise connect the two wires of the pulse output to the terminal strip For this application however they are not connected further
49. the beam or view directly with optical instruments GE SN XXXXXX N Ex ce X eser kasse CLASS 1 LASER PRODUCT LASER KLASSE 1 780 nm DIN EN 60825 1 2008 05 IEC 60825 1 2001 08 INVISIBLE LASER RADIATION DO NOT STARE INTO BEAM UNSICHTBARE LASERSTRAHLUNG NICHT DEM STRAHL AUSSETZEN www ott com Made in Germany Fig 1 Functional principle of the OTT Parsivel 5 Introduction The OTT Parsivel is a laser based optical system for complete and reliable mea surement of all types of precipitation The size range of measurable liquid precipi tation particles is from 0 2 5 mm for solid precipitation particles it is from 0 2 25 mm In the process precipitation particles can have a velocity of from 0 2 20 m s The precipitation particles are categorized as follows Drizzle Drizzle with rain Rain Rain drizzle with snow Snow Snow grains Freezing rain Hail The precipitation measurements are carried out using a special sensor head that was developed for this particular purpose It detects precipitation optically The data thus determined are processed and stored by a fast digital signal processor The OTT Parsivel issues one data telegram every 60 seconds 5 1 Functional principle The theory behind the OTT Parsivel is a laser sensor that produces a horizontal strip of light The emitter and the receiver are integrated into a single protective housing
50. tively using a terminal software Notes on setting these parameters can be found in Appendix A CS command set or the OTT Parsivel software ASDO operating instructions Connect the OTT Parsivel 2 as follows to the datalogger with pulse input Fig 12 Connecting the OTT Parsivel to the datalogger with pulse input The figure shows the example connection SE B using the terminal strip of an pulse input 28 OTT power supply accessory DEC In addition the four wires of the voltage R 20 ka supply heating red blue electronics hit t brown white mus e connected to the Ga 100 power supply see Chapter 9 Likewise connect the two wires of the RS 485 SDI 12 interface to the terminal strip For this application however they are not connected further Terminal strip Power supply Qo 24 V DC 100 W Protective housing version elel OTT Parsivel H connection cable 0 E oz gt Z ZS 26261 5 o Hz SS o o zz 9 a8 E vo 0 22 20 8 Connecting the OTT Parsivel to a PC The OTT Parsivel contains an RS 485 interface Depending on whether your has an RS 232 or USB interface a corresponding interface converter must be used that provides automatic conversion between the OTT Parsivel and the PC Here we recommend using one of the two interface converters from our list of accessories To connect the OTT Parsi
51. tputs the data telegram 11 2 Measured value numbers The measurements and status values are output from the OTT Parsivel in the form of a telegram To this end each value that can be output was assigned a measurement number In addition the number of digits that the value in the telegram can con tain the form in which this value is output the covered range and in what unit it is precisely defined These specifications are listed in the following table No Description Digits Form Range Unit Ol Rain intensity 32 br 8 0000 000 0 000 9999 999 mm h 02 Rain amount accumulated 32 bit 7 0000 00 0 00 0300 00 mm 03 Weather code acc to SYNOP w w Table 4680 2 00 00 99 04 Weather code acc to SYNOP ww Table 4677 2 00 00 99 05 Weather code METAR SPECI w w Table 4678 5 RASN 06 Weather code according to NWS 4 RLS 07 Radar reflectivity 32 bit 6 00 000 9 999 99 999 dBz 08 visibility in precipitation 5 00000 20000 m 09 Sample interval 5 00000 0 03600 5 10 Signal amplitude of the laser strip 5 00000 0 99999 1 11 Number of detected particles 5 00000 0 99999 1 12 Temperature in the sensor housing 3 000 99 100 C 13 Sensor serial number 123456 14 Firmware IOP version number 2 02 3 15 Firmware DSP version number 2 02 3 16 Heating current 4 0 00 0 00 4 00 A 17
52. value7 gt Signal amplitude of the laser strip 1 Measured value format pbbbbb Range 0 99999 lt value8 gt Number of detected particles 1 Measured value format pbbbbb Range 0 99999 P Sign b Number before decimal point Output without leading zeros e Number after decimal point Start measurement and request CRC Cyclic Redundancy Check for details see command aM The responses to the following and aD1 commands are extended by one CRC value lt valuel gt lt value2 gt lt value3 gt lt value4 gt lt value5 gt lt value6 gt lt CRC gt lt CR gt lt LF gt or a lt value7 gt lt value8 gt lt CRC gt lt CR gt lt LF gt Start concurrent measurement simultaneous measurement with multiple sensors on one single bus line for details see command aM The number of measured values in the response to this command has two digits nn 02 Start concurrent measurement simultaneous measurement with multiple sensors on one single bus line and request CRC Cyclic Redundancy Check for details see command aM The number of measured values in the response to this command has two digits nn 02 The responses to the following and aD1 commands are extended by on CRC value a lt valuel gt lt value2 gt lt value3 gt lt value4 gt lt value5 gt _ lt value6 gt lt CRC gt lt CR gt lt LF gt or a lt value7 gt lt value8 gt lt CRC gt lt CR gt lt LF gt Start additional measure
53. vel to your PC proceed as follows Connect the RS 485 interface of the OTT Parsivel to the interface converter used see Chapter 8 1 8 2 or 8 3 Connect the interface converter to the PC Start the OTT Parsivel software ASDO or a terminal program on the PC such as Hyperterminal Configure and operate the OTT Parsivel with the OTT Parsivel software ASDO see also manual OTT Parsivel software ASDO or alternatively with a termi nal software see also Chapter 11 Operating the OTT Parsivel with a terminal software 8 1 Connecting the OTT Parsivel to the RS 485 RS 232 interface converter The RS 485 RS 232 interface converter accessory can be set up for 2 wire communication as well as to 4 wire communication Setting the dip switches at the interface converter Set the internal dip switches at the interface converter as follows Operating mode 12 3 4 5 6 7 8 RS 485 2 wire without echo on on off on off off off off automatic control without bus termination 21 2 wire communication Connect the OTT Parsivel as follows to a 9 pin Sub D socket female Fig 13 Connecting the OTT Parsivel to an RS 485 RS 232 interface converter The figure shows the example connection using the terminal strip of an OTT power supply accessory Sub D plug connector RS 485 RS 232 Interface converter Solder side In addition the four wires of the voltage supply heating red blue electronics brown white

Operating instructions Present Weather Sensor OTT Parsivel2

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