Operating instructions Present Weather Sensor OTT Parsivel2
Contents
1. 85 C Standard 10 41 Appendix B 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 parti des B 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 Class average in mm Class spread in mm 1 0 062 0 125 2 0 187 0 125 3 0 312 0 125 A 0 437 0 125 5 0 562 0 125 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 mea surements using the OTT Parsivel since they are outside the measurement range of the device Classification according to sp2. 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
3. 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 instructions must be accessible at the point of use of the mea surement device Personnel responsible for i
4. OTT netDL connected to an SDI 12 interface netDL1000 Parsivel 501 12 Interfaces 3 Devices 1 Internet Connections 1 Servers 1 Transmissions 1 Maintenance windows 1 Time synchronisation Alarm management Display Observer Channel 0001 7 Intensity Meas cycle 00 01 00 E 34 SDI 12 Master MOD MOD 104 05 VO 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 z 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 z Meas cycle 00 01 00 V06 Virtual Sensor Channel 0007 Laserdynamic d Meas cycle 00 01 00 V07 Virtual Sensor Channel 0008 Particle Meas cycle 00 01 00 V08 Virtual Sensor i Store 19 Fig 12 Connecting the OTT Parsivel to the datalogger with pulse input The figure shows the example connection 20 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 RS 485 SDI 12 interface to
5. mm h Tab 4680 Tab 4677 light lt 02 57 58 moderate 0 2 0 5 58 59 heavy gt 0 5 58 59 Rain Intensity Rain rate mm h Tab 4680 Tab 4677 light 02 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 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 40 77 77 Freezing rain Intensity Rain rate mm h Tab 4680 Tab 4677 light lt 0 4 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 gt 7 5 89 90 C 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 2 R RA moderate 0 5 7 5 R RA heavy 27 5 R RA Rain drizzle with snow Intensity
6. Pulse 6 Pulse 7 RS 485 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 If the outside temperature drops below 10 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 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
7. RS 485 interface the total Connection b 2 cable length between the OTT Parsivel and Mains voltage 5g the datalogger may be a maximum of 20 100 240 V z5 Ports for meters Otherwise a 120 Ohm terminator gs connection to is necessary on the OTT Parsivel between 1 99 H datalogger the yellow and green wires 4 2 aloleleiololole Terminal strip for control cabinet installation ll ellen ole 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 27 7 Integrated fuse spare fuse Power supply 24 V DC 100 W Control version Accessory Mains voltage P EN 100 240 V AC Y me Remove bridges depending on 2 SS ge Sec application strips Tak z 1 2 3 4 5 6 7 8 e 5
8. Rain rate mm h NWS Tab 4678 ligh 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 SG heavy 240 SG 56 Freezing rain Intensity Rain rate mm h NWS Tab 4678 light lt 0 4 SP 86 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 45 Appendix D Declaration of conformity OTT Parsivel OTT TONNEN arn memes Wir We Nous Anschrift Address Adresse erkl ren dass das Produkt declare that the product declarons que le produit Bezeichnung Name Nom Konformit tserkl rung Declaration of Conformity Declaration de Conformit OTT Hydromet GmbH LudwigstraBe 16 D 87437 Kempten 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 Klasse class classe 1 Ort und Datum der Ausstellung Kempten den Place and Date of Issue Lieu et date d tablissement IEC 60825 1 class classe 1 ey UU VOY T r Ate Name
9. at the time interval set for sample intervals on the datalogger or PC Fig 7 Connecting the OTT Parsivel to the OTT netDL via the 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 gt Max cable length 300 m Cable length lt 20 m Remove bridge ORIO Terminal strip gt s Power supply gl 24V DC 100W D DD Protective housing version 8 L I 2 D OTT Parsivel I connection cable 0 0 1 m 4 6 2 3 PG TJ i Tb S 2 2 I Configuring the OTT netDL IP datalogger for 85 485 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 n
10. 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 power supply optionally on pedestal t H total height SS Disdrometer Pedestal p General im Present Weather Sensor OTT Parsivel 2m Power supply Storage without precipitation spectrograph Storage with precipitation spectrograph c Y Outputs RS 485 SDI 12 pulse T 1 Chapt
11. supply Vs 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 Supply Supply GND GND 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 1200 connected further Max cable length lt 20 m Remove bridge Ko OO Terminal strip Nl Power supply GL 24 V DC 100 W D D Protective housing version Z 8 L I 2 I OTT Parsivel I connection cable 0 0 1 da 2626239 2 Sg SSC 9 E TET x 3 2 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
12. 0K of 27K Elapsed 00 00 09 Remaining 00 00 15 Throughput f 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 location 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 regard
13. 1 00 1 2 Parsivel PWS Instantaneous value Store Channel 0008 Signal amplitude of the laser strip Meas cycle 00 01 00 i 1 2 Parsivel PWS Instantaneous value Channel 0009 Temperature in the sensor Meas cycle 00 01 00 1 2 Parsivel PWS Instantaneous value 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 71 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 connected to a PC via the USB interface The SDI 12 interface can be switched to active through the Parsivel us
14. 11 1 Setting up communications between the 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 Parsivel 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 2011 VERSION V1 00 0 Approximately 60 seconds after starting to establish the connection the OTT Parsive
15. 15200 The baudrate is set at 19200 at the factory 1200 baud 8 N 1 8 N 1 4800 baud 8 1 9600 baud 8 N 1 19200 baud 8 N 1 38400 baud 8 N 1 57600 baud 8 N 1 2400 baud 8 P 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 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 Doc Standard 0 Description 0 SDI 12 mode disabled 1 SDI 12 mode enabled CS S A lt parameter gt lt CR gt Set bus address for SDI 12 bu
16. 20 01 01 2000 time measurement begins 00 00 00 20 Sensor time 8 00 00 00 21 Sensor date 10 00 00 0000 22 Station name 10 XXXXXXXXXX 23 Station number 4 XXXX 24 Rain amount absolute 32 bit 7 000 000 mm 25 Error code 3 000 30 Rain intensity 16 bit max 30 000 mm h 00 000 mm h 31 Rain intensity 16 bit max 1200 0 mm h 6 0000 0 mm h 32 Rain amount accumulated 16 bit 7 0000 00 mm 33 Radar reflectivity 16 bit 5 0000 dBz 34 Kinetic energy 6 000 00 KJ 90 Field N d 223 00 0005 log 1 m mm 1st value average volume equivalent diameter vD of the 1st class 91 Field v d 223 00 000S m s Ist value average rate of fall Fg of the 1st class 93 Raw data 4095 0005 1 15 value number of particle 1 vD 1st Fg 32 value number of particle 32 vD 1st Fg 33 value number of particle 1 vD 2nd Fg The measurement value number must be selected based on the datalogger used along with the corre sponding number of bits S separator 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
17. 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 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 1200 Cable length lt 20 m Remove bridge ORO Terminal strip Ts Power supply 1 24V DC 100 W Protective housing version Z 8 L 1 2 OTT Parsivel connection cable L 2 9 m q 26262239 2 5 ki S 2 2 I 22 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 off on off Connect the OTT Parsivel as follows Fig 14 Connecting the OTT Parsivel to an ADAM 4520 RS 485 RS 232 interface converter Interface converter Adam 4520 The figure shows the example connection RS 485 RS 232 2 using the terminal strip of OTT power
18. 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 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 OQ Terminal strip iss Power supply 24 V DC 100 W Protective housing version 7 8 L I 2 I OTT Parsivel connection cable L 2 m SEENEN 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 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 galvani
19. cally 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 datalogger 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 Parsivel 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 Proceed as follows to connect the OTT Parsivel to the PC via the USB interface Parsivel base D a a 1 USB service interface 25 26 Remove the cover of the OTT Parsivel base Allen key 4 mm Connect the USB cable to the service interface of the OTT Parsivel Insert the USB plug into the USB socket of your PC Start the OTT Parsivel software ASDO Basic or terminal software 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 pr
20. ces 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 ww Table 4680 SYNOP ww Table 4677 NWS METAR SPECI ww 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 Microprocessor controlled heating 28 V DC reverse polarity protection 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 0 100 relative humidity IP 65 resistant to salt spray 670 x 600 x 114 mm 1 Under laboratory conditions and statistically correlated by OTT calib
21. 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 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 r
22. e 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 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 1 Screw terminal strip C Q vO Qr Max cable length 100 m Remove bridge Ko OO Terminal strip st Power supply E 24V DC 100 W D D M Protective housing version 7 8 I 12 L Parsivel 1 connection cable 0 0 1 2626222 5 amp eco 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 other wise Fig 11 Configuration example of an
23. eed Class number Class average in m s Class spread in m s 1 0 050 0 100 2 0 150 0 100 3 0 250 0 100 4 0 350 0 100 5 0 450 0 100 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 0 200 13 1 500 0 200 14 1 700 0 200 15 1 200 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 44 Appendix C 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 C 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 02 51 51 moderate 0 2 0 5 52 53 heavy gt 0 5 53 55 Drizzle with rain Intensity Rain rate
24. ent 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 Parsivel properly after taking out of service Observe the regulations valid in your country for the disposal of electronic devices Never put the OTT Parsivel 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 Interfa
25. er 8 Chapter 8 Chapter 7 1 Chapter 7 2 Chapter 7 3 Chapter 9 d EE E PSR RETTER 4 E a ME EERSTE RE 1 1 1 1 1 I 1 i i i i i i i i i i i i Bu Y Y Cable Cable Cable Cable Pulse Cable length max 300m max 300 m max 300m max 100m Supply RS 485 RS 485 RS 485 SDI 12 voltage see Ch 6 1 Interface Interface converter converter RS 485 2 wire cin RS 232 USB RS 232 USB RS 485 OTT netDL 1000 SDI 12 Datalogger Power supply ASDO Basic ASDO full version OTT netDL 500 Datalogger with pulse input p OTT Hydras 3 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 of an electrically conducting material and is grounded The concrete foundation of the pedestal must have minimum dimensions of 40 x 40 x 80
26. er 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 Parsivel 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 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
27. er 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 SDI 12 data formats Value 0 Rain intensity mm h Value 1 Rain amount accumulated mm Value 2 Weather code according to SYNOP w w Table 4680 Value 3 Radar reflectivity dBz Value 4 MOR visibility in precipitation m Value 5 Sample interval s Value 6 Signal amplitude of the laser strip 1 Value 7 Number of detected particles 1 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 g a 68 Max cable length 100 m Remove bridge DAJO Terminal strip Ds Power supply Et 24V DC 100 W D DD Protective housing version 7 8 L t 2 D OTT Parsivel I connection cable 0 28262232 Bot gt a 2 E E a a B T T aii I 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 th
28. esistance of cable 2 The length of the cable is dependent on the wire cross section Wire cross section max cable length for heating setting 50W 100 W 0 75 mm 42m 21 m 1 0 mm 56m 28 m 1 5 mm 84 m 42m 2 5 mm 140 m 70 m 4 0 mm 225 m 112 5 See Chapter 10 Fig 3 Grounding the OTT Parsivel2 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 Parsivel 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 them a few turns Remove the insulation from one end of the grounding cable approximately 2 cm Insert the uninsulated end of the ground
29. etDL 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 A A A 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 C 1 2 Parsivel PWS Instantaneous value i Store Channel 0002 Intensity low resolution Meas cycle 00 01 00 C 1 2 Parsivel PWS Instantaneous value Store Channel 0003 Rain amount since start of device Meas cycle 00 01 00 E 1 2 Parsivel PWS Instantaneous value Store Channel 0004 Weather code SYNOP wawa T ab 4680 Meas cycle 00 01 00 1 2 Parsivel PWS Instantaneous value Store Channel 0005 Radar reflectivity Meas cycle 00 01 00 C 1 2 Parsivel DAG Instantaneous value Store Channel 0006 MOR visibility in precipitation Meas cycle 00 01 00 C 1 2 Parsivel PWS lt Instantaneous value Store Channel 0007 Sensor status Meas cycle 00 0
30. 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 12 10 11 18 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 C Categorization of precipitation 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 IOP BIN where represents the respective version number To update the OTT Parsivel2 firmware proceed as follows Connect your PC to the OTT Parsivel via the corresponding inte
31. ing 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 Grub screw Cable lug Copper screws 11 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 Fig 4 Connecting the connection cable to the OTT Parsivel base 4 OTT Parsivel base gt L QI QI m S 8 pin plug with cap nut Parsivel connection cable Slide the connected and grounded OTT Parsivel onto the pedestal 12 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 depending 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 po
32. l starts measuring automatically and outputs 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 mea surement number In addition the number of digits that the value in the telegram can contain the form in which this value is output and in what units is precisely defined These specifications are listed in the following table Meas Description Digits Form Units value No 01 Rain intensity 32 bit 8 0000 000 mm h 02 Rain amount accumulated 32 bit 7 0000 00 mm 03 Weather code according to 2 00 1 SYNOP w w Table 4680 04 Weather code according to 2 00 1 SYNOP wwTable 4677 05 Weather code METAR SPECI w w 5 RASN 1 Table 4678 06 Weather code according to 4 RLS 1 NWS code 07 Radar reflectivity 32 bit 6 00 000 dBz 08 MOR visibility in the precipitation 4 0000 m 09 Sample interval 5 00000 s 10 Signal amplitude of the laser strip 5 00000 1 11 Number of detected particles 5 00000 1 12 Temperature in the sensor 3 000 13 Sensor serial number 6 123456 1 14 Firmware IOP version number 4 V1 01 1 15 Firmware DSP version number A V1 01 1 16 Current through the heating system 3 0 0 A 17 Power supply voltage in the sensor 4 00 0 18 Sensor status 1 0 see Ch 12 1 19 Date
33. less 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 easily 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 pr
34. nstallation 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 manvfacturer 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 Parsivel is a class 1 laser product which complies with IEC EN 60825 1 A2 2001 Wavelength 780 nm output max 0 3 mW Do not stare into the beam or view directly with optical instruments ER Pase SN XXXXXX A ER ce X use
35. ocess Note The USB interface cannot be used as a permanent 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 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 Fig 17 Connecting power supply control cabinet version to the OTT Parsivel Power supply Install the power supply in the control 24V DC 100 Ww e cabinet on a standard top hat rail m UT cabinet version For optimum running of the cable in the Accessory area where the cable enters the control cabinet a terminal strip should be used When using the
36. otector 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 Parsivel with a terminal software The OTT Parsivel should send a status message of ok in response to the CS CR 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 prev
37. r 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 Laser beam A Receiver Transmitter eceive Precipitation particle Measurement of particle
38. r 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 4 x anchor rods 4 x anchor bolt glue cartridges OTT Parsivel PC software ASDO full version Splash 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
39. ration 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 lt parameter gt lt CR gt 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 CR 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 1
40. rface 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 lt CR gt OTT Parsivel answers with Bootloader OTT Parsivel Press CR repeatedly directly after the message Parsivel replies with Input the command sup lt CR gt OTT Parsivel answers with Start upload Firmware with XAODEM CRC Select Transfer Send file in the menu bar The Send file window opens Fig 19 Send file window 2 xl Folder CH Eilename DOPARSIVEL2 BIN Browse Protocol Xmodem v Close Cancel Select the file IOPBIN 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 CT00PARSIVEL2 BIN Packet 85 Error checking CRC Retries o Total retries 0 Last error File 1
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 Classification of precipitation types B 1 Class limits Appendix C Categorization of precipitation type by precipitation codes C 1 SYNOP precipitation code C 2 NWS and METAR SPECI w w precipitation code Table 4678 Appendix D Declaration of conformity 39 42 42 44 44 45 46 1 Scope of supply OTT Parsivel 1 laser optical disdrometer consisting of two sensor heads with splash protection 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 sup ply 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 type B 3 m I OTT Parsivel PC software ASDO basic version I set of operating instructions 2 Orde
42. s 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 0 1 Standard 0 Description 0 telegram 1 User telegram CS M S parameter CR Set formatting string You can create a data telegram that is optimized according to your needs This command sets the formatting string The formatting string is placed in the para meter 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 OFF 1 Automatic 50 W 2 Automatic 100 W 3 la 100 W 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
43. ssible Sensor head arsivei Parsivel base Grub screw m 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 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 ma yellow RS 485 B 501 12 GND EHE green RS 485 501 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 operating type the OTT Parsivel does not send the pulse at intervals of one minute but
44. the terminal strip For this application however they are not connected further 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 V max 100 mA Open circuit vollage 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 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 Connect the OTT Parsivel 2 as follows to the datalogger with pulse input Datalogger with pulse input 9 Oc R 20 kQ Cable length max 100 Terminal strip Power supply alo 24 V DC 100 W Protective housing version 5 6 ig io OTT Parsivel 1 E connection cable Q 0 ro 8 oz NZ 2 5 20262860 H o5 z gt T 3 a8 Y a4 o gs 2g 8 Connecting the OTT Parsivel to a PC The OTT Parsivel contains an RS 485 interface Depending on whether your PC has an RS 232 or USB interface a corresponding interface convert
45. und Unterschrift des Befugten 2 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 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 46 Document number 70 210 001 B E 04 0911 OTT Hydromet GmbH Ludwigstrasse 16 87437 Kempten Germany Tel 49 831 5617 0 Fax 49 831 5617 209 infoGott com www ott com
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