OTT Parsivel2 Operating Instructions Manual
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OTT Parsivel2 Operating Instructions Manual

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Operating instructions
Present Weather Sensor
OTT Parsivel
2

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Summary of Contents for OTT Parsivel2

  • Page 1 Operating instructions Present Weather Sensor OTT Parsivel...
  • Page 2 We reserve the right to make technical changes and improvements without notice.

  • Page 3: Table Of Contents

    7 Connecting the OTT Parsivel to a datalogger 7.1 Connecting the OTT Parsivel to an OTT netDL IP datalogger using the RS-485 interface 7.2 Connecting the OTT Parsivel to a datalogger via an SDI-12 interface 7.3 Connecting the OTT Parsivel...
  • Page 4 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 Precipitation code according to SYNOP D.2 Precipitation code according to the NWS and METAR/SPECI w’w’, Table 4678 Appendix E –...

  • Page 5: Scope Of Supply

    2 x lock washers 1 x Allen key, 4 mm – 1 USB connection cable. USB connector type A to USB type B, 3 m – 1 OTT Parsivel PC software "ASDO", basic version – 1 set of operating instructions 2 Order numbers...

  • Page 6: Ott Parsivel Factory Settings

    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" Oper - ating instructions.

  • Page 7: Safety Information

    If person- nel do not have the required knowledge, it must be provided through training and instruction. If necessary, OTT Hydromet can provided this service on a con- tractual basis for the owner.

  • Page 8: Introduction

    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.

  • Page 9: Connection Options For The Ott Parsivel

    OTT netDL 1000 SDI-12 Datalogger Power supply – ASDO Basic – ASDO full version Datalogger with pulse input OTT netDL 500 Storage without Storage with precipitation precipitation spectrograph spectrograph – OTT Hydras 3 Fig. 2: Connection options for the OTT Parsivel...

  • Page 10: Installing The Ott Parsivel

    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).

  • Page 11: Connecting Ground To Ott Parsivel

    1 M 8 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.

  • Page 12: Installing The Ott Parsivel

    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.
  • Page 13 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 possible. Fig. 5: Installing the OTT Parsivel on the pedestal. Sensor head...

  • Page 14: Connecting The Ott Parsivel

    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.
  • Page 15 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 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".
  • Page 16 Fig. 8: Configuration example of an OTT netDL connected to an RS-485 interface.
  • Page 17 Parsivel user software ASDO or using a terminal program and the command "CS/S/E/1<CR>" (see operating instructions for OTT Parsivel user software ASDO and Chapter 11 "Operating the OTT Parsivel with a terminal software").
  • Page 18 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 …".
  • Page 19 Fig. 11: Configuration example of an OTT netDL connected to an SDI-12 interface.
  • Page 20 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"...

  • Page 21: Connecting The Ott Parsivel

    If you want to use the RS-232-interface of a PC, you have to buy a suitable RS-485/RS-232 interface converter from a specialist dealer. (As RS-232-interfaces are not common anymore for new PCs, OTT Hydromet does not offer RS-485/ RS-232 interface converters as accessories anymore).

  • Page 22: Connecting The Ott Parsivel

    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"!

  • Page 23: Connecting The Ott Parsivel

    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.
  • Page 24 Connect the USB cable to service interface of the OTT Parsivel (USB plug type B; see Fig. 14). 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;...

  • Page 25: Connecting The Ott Parsivel

    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).
  • Page 26 Fig. 16: 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 Ports for connection to a datalogger Connection has a length of one meter.

  • Page 27: Heating The Ott Parsivel

    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.

  • Page 28: Operating The Ott Parsivel

    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.
  • Page 29 No. Description Digits Form Range Unit Rain intensity (32 bit 0000.000 0.000 … 9999.999 mm/h Rain amount accumulated (32 bit 0000.00 0.00 … 0300.00 Weather co de acc. to SYNOP w ; Table 4680 00 … 99 Weather co de acc. to SYNOP ww; Table 4677 00 …...

  • Page 30: Defining The Formatting String

    %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;/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;...

  • Page 31: Updating Ott Parsivel

    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.
  • Page 32 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 Parsivel . The firmware was successfully updated.

  • Page 33: Maintenance / Verification

    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.

  • Page 34: Verifying Particle Size Measurements

    (centre of the laser strip). In addition, a collecting device must be used below the sensor heads to prevent damage to the struts and base of the OTT Parsivel This method of verification permits only an approximate statement.

  • Page 35: Functional Disruptions And Remedies

    (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").

  • Page 36: Technical Data

    IP 65, resistant to salt spray Size (H x W x D) 670 x 600 x 114 mm 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 power output ≥ 100 W necessary...

  • Page 37: Appendix A – Cs Command Set

    This command disables the interval-controlled telegram. CS/PA<CR> 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<CR> Repeat polling mode OTT Parsivel outputs the data telegram no later than 500 ms after the confirma- tion of the command.
  • Page 38 Value range: 0 … 9 Standard: CS/T/12:00:00<CR> 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<CR> Adjust date The date of the OTT Parsivel is set to the calendar of the PC.
  • Page 39 Set real time clock This command sets the real time clock of the OTT Parsivel CS/U<CR> Read out real time clock With this command the current date and time of the OTT Parsivel is read out. Response: 01.01.2011 10:55:11 (example) CS/*/D/<parameter><CR>...

  • Page 40: Appendix B – Sdi-12 Commands And Responses

    Appendix 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 Description a<CR><LF> a – Sensor address; factory setting = 0 Acknowledgement active al3ccccccccmmmmmm …...
  • Page 41 Start additional measurement a<CR><LF> – Sensor address and after 9 seconds – Time in seconds until the sensor has determined the measurement result Response OTT Parsivel = 009 – Number of measured values a<CR><LF> – Service request Response OTT Parsivel aD0! a<value1><value2><value3>...
  • Page 42 Command Response Description <value5> Measured value format: pbbb – Temperature in the right sensorhead [°C] <value6> Range: –99 … +100 °C Measured value format: pbbb – Temperature in the left sensorhead [°C] Range: –99 … +100 °C – Sign (+,–) –...

  • Page 43: B.2 Advanced Sdi-12 Commands

    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 be configured from the Trans parent Mode of a datalogger. Command...

  • Page 44: Appendix C – Classification Of Precipitation Types

    17.000 2.000 19.000 2.000 21.500 3.000 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.
  • Page 45 Classification according to particle speed Class number Mid-value of class [m/s] Class spread [m/s] 0.050 0.100 0.150 0.100 0.250 0.100 0.350 0.100 0.450 0.100 0.550 0.100 0.650 0.100 0.750 0.100 0.850 0.100 0.950 0.100 1.100 0.200 1.300 0.200 1.500 0.200 1.700 0.200 1.900...

  • Page 46: Appendix D – Categorization Of Precipitation Type By Precipitation Codes

    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).
  • Page 47 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: METAR/SPECI w’w’ Table 4678 No precipitation Tab. 4678 Drizzle Intensity Rain rate [mm/h] Tab. 4678 light ≤...

  • Page 48: Appendix E – Note On The Declaration Of Conformity

    Appendix E – Note on the declaration of conformity If required, you can download the current version of the declaration of conformity for the OTT Parsivel from our website as a PDF file: "www.ott.com/resources".
  • Page 52 OTT Hydromet GmbH Ludwigstrasse 16 87437 Kempten · Germany Tel. +49 831 5617-0 Fax +49 831 5617-209 Document number 70.210.001.B.E 12-1016 info@ott.com · www.ott.com...

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