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OTT Pluvio 2 S Operating Instructions Manual

Precipitation gauge
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Operating Instructions
Precipitation gauge
OTT Pluvio
S
2

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Summary of Contents for OTT Pluvio 2 S

  • Page 1 Operating Instructions Precipitation gauge OTT Pluvio...
  • Page 2 We reserve the right to make technical changes and improvements without notice.

  • Page 3: Table Of Contents

    S to an OTT datalogger A.1 Connecting the OTT Pluvio S to an OTT netDL or OTT DuoSens via SDI-12 or RS-485 interface A.2 Connecting the OTT Pluvio S to an OTT netDL or OTT DuoSens via the pulse output Appendix B –...

  • Page 4: Scope Of Supply

    1 Scope of supply OTT Pluvio – Weighing precipitation gauge; collecting area: 200 cm ; capacity: 400 mm of precipitation. Consisting of: base plate with weighing mechanism, bucket support, collecting bucket, and pipe housing. With SDI-12, RS-485, and USB interfaces (for servicing purposes). Additional pulse outputs for amount of precipitation and status information.

  • Page 5: Introduction

    The OTT Pluvio S reliably detects precipitation, whether liquid or solid, by determining the weight of the collecting bucket. The OTT precipitation gauge is characterized in particular by its low maintenance needs. This is achieved by means of a high-capacity collecting bucket, the lack of a collection funnel as is typical for tipping buckets, and the very robust design of the weighing mechanism.
  • Page 6 Alternatively, 1.2 or 1.5 meters are possible. After connecting the supply voltage, the OTT Pluvio S automatically starts measuring operation (¨ red LED is flashing, refer to Fig. 18). The OTT Pluvio S is calibrated in the factory. On site, no further calibration is necessary.

  • Page 7: Measured Value Output To The Sdi-12 And Rs-485 Interfaces

    Please note: After connecting the USB interface, the OTT Pluvio S interrupts communication on the serial interfaces! The measuring system of the OTT Pluvio2 S prevents output of any incorrect precipitation amount and does not output any increases in precipitation through the interfaces after the following situations: USB interface was connected (pipe housing removed) for approx.
  • Page 8 Note: Every interface polling resets the total amount values in the OTT Pluvio to zero! Accu NRT This measured value outputs the sum of the correct amounts of precipitation over the sampling interval with a fixed output delay of 5 minutes.

  • Page 9: Measured Value Output At Pulse Output

    (any time between 1 minute and 24 hours) 3.2 Measured value output at pulse output The OTT Pluvio S uses two pulse outputs to output the amount of precipitation RT/NRT (output #1) as well as the status information (output #2) in parallel.
  • Page 10 (0.05 mm · 0.1 mm · 0.2 mm · 0.5 mm · 1.0 mm). The measured value is output as a pulse sequence using a rate of 5 Hz (default) or 2 Hz (con figurable through the OTT Pluvio S operating software via USB interface).

  • Page 11: Graphic Display Of Measured Value Output For Different Precipitation Intensities

    Please note: When the pulse outputs are connected to – OTT dataloggers ¨ no additional wiring is required to be made. You may directly connect the pulse outputs to the pulse inputs of an OTT datalogger. – Third-party datalogger ¨ external wiring at the pulse and status outputs must be designed in such a way, that the limits for I ≤...

  • Page 12: Orifice Ring Rim Heater

    3.4 Orifice ring rim heater For the OTT Pluvio S, an optional orifice rim heater is available. This heater reliably keeps the orifice rim free of snow and ice at low ambient temperatures (e.g. no snow or ice build-up). No snow will accumulate at the orifice rim.
  • Page 13 In addition to this, several modes of operation provide the option of enabling/ disabling the heater control system based on certain criteria (see below). When the heater control system is enabled, the OTT Pluvio S unit continuously performs a functional test for the orifice rim heater (heater self-test) to detect potential error conditions.
  • Page 14 Please note: This mode requires the OTT Pluvio S system time to be set cor- rectly. In case a power failure lasts longer than 10 minutes, the OTT Pluvio system time will be lost. This will result in incorrect heater control system opera- tion! Fig.

  • Page 15: Basic Safety Information

    Carry out all recommended maintenance work at the frequencies specified. See Chapter 7, „Carrying out maintenance work“. Do not make any changes or retrofits to the OTT Pluvio S! If changes or modifications are made, any warranty will be void.

  • Page 16: Installing The Ott Pluvio

    (possible external diameter of pedestal 50 to 60.3 mm). The pedestal must be securely attached to a concrete foundation having the appropriate dimen- sions. The pedestals that are available from OTT as accessories are fitted with a bottom plate designed for this purpose.

  • Page 17: Required Tools And Equipment

    Please note: All connection cables must be UV-resistant and suitable to be laid in the ground! Connection cable for data collection device/precipitation gauge SDI-12 interface – Cable length: maximum 70 m – Cable type: shielded low-voltage cable – Wire size: 3 x 0.5 mm 2 2) RS-485 interface –...

  • Page 18: Preparing The Installation Location

    S is implemented centrally in the area of the data collection device: Also pull the grounding cable into the empty con- duit pipe (alternatively, the ground is established directly at the OTT Pluvio using a concrete footing ground or ground rod).

  • Page 19: Preparing The Base Plate

    5.4 Preparing the base plate Carefully transport the OTT Pluvio S to the installation location in the closed shipping carton Open the shipping carton and remove the acceptance certificate (FAT), the polybag including installation accessories and possibly further existing accessories.

  • Page 20: Preparing The Connection Cable

    Unscrew 4 Phillips screws on the cover of the electronics unit approx. 3 mm, raise the cover slightly and pull it off forwards. When the foam rubber seal for the cover is stuck to the surface below, carefully pry the cover off using a slotted head screwdriver.
  • Page 21 SDI-12 Data Data GND Heating +24 V +12 … +24 V Heating GND Fig. 11: OTT Pluvio S with orifice rim heater: Connecting options for Method A: separate supply for heater and precipitation gauge power supply of the precipitation gauge and orifice rim heater.

  • Page 22: Installing The Base Plate On The Pedestal

    5.6 Installing the base plate on the pedestal Place the base plate onto the pedestal such that the connection and grounding cables come out of the slit in the base plate flange (see Fig. 14). Lead connection and grounding cables through the opening in the base plate upwards.

  • Page 23: Connecting The Connection Cable

    5.7 Connecting the connection cable Push rubber grommet with connection cable into the slot. Connect 6-wire and 8-wire screw terminal strip to the appropriate PCB sockets. Connect the twisted shielding of the cables to the terminal, refer to Fig. 13. If necessary, pull back connection cable and store in pedestal (raise base plate again if necessary).

  • Page 24: Aligning The Base Plate

    Alternately tighten all hexagon bolts while avoiding any distortion of the base plate! Maximum torque: 6 Nm. Again check bubble level for correct adjustment. Fig. 15: Levelling the OTT Pluvio S unit. Correct operation of the weighing mechanism is insured only if the base...

  • Page 25: Performing Final Work

    5.10 Performing final work Replace the electronics unit cover and tighten the four Phillips screws. Align the bucket support (refer to decal) and carefully place it onto the bracket for the bucket support. Secure the bucket support using three Phillips screws (included in polybag). Fig.
  • Page 26 Collecting bucket Anti-rotation protection Spring-loaded terminal Bucket support As necessary: change the factory settings using the OTT Pluvio operating software. For installation procedure and using the operating software, refer to Chapter 7.6. Factory settings: – SDI-12 sensor address – serial interface SDI-12 –...
  • Page 27 Align the pipe housing and place it onto the base plate. The pipe housing must completely seat on the base plate (refer to the detail drawing in Fig. 20)! OTT Pluvio S with orifice rim heater: Ensure that the sockets in the connection block are not contaminated.
  • Page 28 Tighten three knurled bolts. Fig. 20: Fitting the pipe housing and tightening the knurled screws. Please note: Always place and remove the pipe housing of the OTT Pluvio S with orifice rim heater straightly! Pipe housing Knurled bolt (3 x)

  • Page 29: Sdi-12 Commands And Responses

    6 SDI-12 commands and responses 6.1 Basic commands All SDI-12 basic commands are implemented in the OTT Pluvio S. The following SDI-12 basic commands are relevant for the operation of the OTT Pluvio p – Sign (+,–) Conventions applicable to measured value formats: b –...
  • Page 30 +128 = W: Orifice rim heater disabled or not present W = warning; A = alarm. When the OTT Pluvio S unit outputs other values than those indicated here, several events have occurred simultaneously. In such a case, the individual values are added up.
  • Page 31 +512 = A: Weight above maximum +1024 = A: No weight calibration W = warning; A = alarm. When the OTT Pluvio S unit outputs other values than those indicated here, several events have occurred simultaneously. In such a case, the individual values are added up.

  • Page 32: Advanced Sdi-12 Commands

    All advanced SDI-12 commands start with an “ “ for OTT. These commands may be used, for example, to retrieve addition- al information from an OTT Pluvio S through the transparent mode of a datalogger or to configure an OTT Pluvio Command Response...
  • Page 33 – sensor address p – sign (+) b – 2 … 9 (+2 … +9 °C); factory setting +4 °C Set/read orifice rim heater lower temperature limit (OTT Pluvio S with orifice rim heater) Orifice rim heater mode: #2 aOCHGpbb! apbb<CR><LF>...
  • Page 34 Set/read serial interface (SDI-12 or RS-485) aOCLb! ab<CR><LF> aOCL! ab<CR><LF> Set serial interface Read serial interface a – sensor address b – 0 = SDI-12; factory setting 1 = RS-485 2-wire 2 = RS-485 4-wire Set/read protocol on RS-485 interface aOCMb! ab<CR><LF>...

  • Page 35: Rs-485 Command Line Mode (Ascii Text Retrieval)

    OTT Pluvio S. Using an ASCII character format command set, any measured values can be retrieved and various settings made. This command set must be implemented in the data recording device. In the OTT Pluvio S unit, a number of operating parameters are to be set using the OTT Pluvio operating software.

  • Page 36: Performing Maintenance Operations

    7 Performing maintenance operations To ensure smooth operation of the precipitation gauge, we recommend to perform the following maintenance operations at the intervals given: Emptying: bucket level ≥ 80 % Add anti-freeze: ambient temperature < 0 °C Visual inspection: once a year Check measurement: once a year 7.1 Emptying the collecting bucket...

  • Page 37: Performing The Visual Inspection

    How to add anti-freeze agent: Preparing the anti-freeze solution: Mix 1 litre of anti-freeze with 0.4 litre of water. Carefully add anti-freeze solution to the collecting bucket (the pipe housing does not have to be removed for this). Please note: Add anti-freeze agent only as an aqueous solution (add 40 % of water)! Never use neat! (POWERCOOL is hygroscopic.) Note on disposing of anti-freeze solution Typically, the anti-freeze solution of a single precipitation gauge may be disposed...

  • Page 38: Troubleshooting/Remedy

    Incorrect configurations of the OTT Pluvio² S and/or of the data recording unit connected: ¨ check the SDI-12 sensor address of OTT Pluvio² S and correct as necessary (using the OTT Pluvio² Operating Software); ¨ check the “Communication interface” (SDI-12) setting and correct as necessary (using the OTT Pluvio²...
  • Page 39 ¨ 4-wire: check pin assignments “… TX - A“, “… TX- B“ as well as of “… RX - A“, “… RX - B” and swap as necessary. Incorrect configurations of the OTT Pluvio² S and/or of the data recording unit connected: ¨ check the “Communication interface” (RS-485/RS-485 4-wire) setting and correct as necessary (using the OTT Pluvio²...
  • Page 40 Pipe housing (including built-in orifice rim heater) is not installed: ¨ install the pipe housing. Pipe housing without built-in orifice rim heater of another OTT Pluvio² S is accidentally installed: ¨ install the pipe housing with built-in orifice rim heater.
  • Page 41 Warning “+16” (using the OTT Pluvio² Operating Software). Precipitation gauge probably failed: ¨ perform Guided Accuracy Test (using the OTT Pluvio² Operating Software). Precipitation gauge is not level: ¨ check the bubble level indicator and correct adjustment as necessary.

  • Page 42: Performing The Guided Accuracy Test (Check Measurement)

    S Software” flash drive is available as an accessory to the OTT Pluvio S (refer to Appendix E). In addition to the Operating Instructions (PDF file), USB interface driver, and OTT datalogger example configurations, this flash drive includes the OTT Pluvio Oper- ating Software.
  • Page 43 Loosen the three knurled screws at the pipe housing. Remove the pipe housing upwards. Remove both spring-loaded terminals and carefully remove the collecting bucket. Remove the USB interface cover and connect the OTT Pluvio S to the PC via the USB cable (included); refer to Fig. 21.

  • Page 44: Repair

    Please note: Only have a defective OTT Pluvio S checked and repaired by the OTT repair center. Never attempt to repair the unit yourself! On no account carry out repairs yourself! Only a qualified repair followed by a factory final test ensures the specified measurement accuracy.

  • Page 45: Technical Data

    2 or 5 Hz Measured values/status values output IIntensity RT, Accu RT/NRT, Accu NRT, Accu total NRT, Bucket RT, Bucket NRT, Temperature of load cell, OTT Pluvio2 S status, Heater status Supply voltage for orifice rim heater 12 … 28 V ;...
  • Page 46 Limits/accuracy...

  • Page 47: Appendix A - Connecting The Ott Pluvio

    SDI-12). The maximum length of the cable is 70 m! Connect the OTT Pluvio S to the OTT netDL IP datalogger or to the OTT DuoSens Compact Datalogger as shown in Figure A1. Also refer to the OTT netDL/OTT DuoSens Operating Instructions.
  • Page 48 OTT Pluvio S, 12 channels in the OTT netDL/OTT DuoSens are thus necessary. The first channel contains the function block “SDI-12 Master” or “OTT SDI RS485” as the input signal. The other channels each contain a function block “Virtual Sensor” (V02 to V09) as the input signal, (V03 in case of M1!). Of course, just individual channels can also be recorded.

  • Page 49: Connecting The Ott Pluvio 2 S To An Ott Netdl Or Ott Duosens Via The Pulse Output

    Connect the OTT Pluvio S to the OTT netDL IP datalogger or to the OTT DuoSens Compact Datalogger as shown in Figure A5. Also refer to the OTT netDL/ OTT DuoSens Operating Instructions. Maximum cable length: 1000 m. Fig. A5: Connecting the OTT Pluvio...
  • Page 50 Please note: Always position a pulse input at the beginning (top) of the function tree. After changing the pulse factor, a data reset (reset the OTT netDL/OTT DuoSens) is necessary! In the “Channel” function block, set the required unit and number of digits after the decimal place.

  • Page 51: Appendix B - Dimensions Of The Ott Pluvio 2 S With Pedestal And Bottom Plate

    Appendix B – Dimensions of the OTT Pluvio S with pedestal and bottom plate ±0,1 Ø 159.6 200 cm Installation height (orifice ring) 1000 1200 1500 Ø 253 mm (max. 288 mm) Pedestal with bottom plate (Length: 424 mm, 624 mm, 924 mm)

  • Page 52: Appendix C - Dimensions Of Pedestal With Bottom Plate

    Appendix C – Dimensions of pedestal with bottom plate Ø 60.3 mm 2" Dimensions A Installation height 1.0 m : 424 mm Installation height 1.2 m : 624 mm Installation height 1.5 m : 924 mm 4 mm Order numbers 70.030.033.9.2 70.030.034.9.2 70.030.035.9.2...

  • Page 53: Appendix D - Installing The Anti-Theft Protection

    Appendix D – Installing the anti-theft protection...

  • Page 54: Appendix E - Accessories/Replacement Parts

    – 4 x hexagon nut M 10 + washer OTT POD 100 platform 70.035.030.2.2 – for use with OTT PWS 100 or OTT PWS 150 wind shields for OTT Pluvio S installation heights of 2.0 or 2.5 m – height: 1 m Mounting kit for OTT POD 100 platform 99.020.082.9.2...
  • Page 55 S software flash drive 56.575.001.9.7 – incl. USB interface drivers – incl. OTT Pluvio operating software – incl. example configurations for the OTT datalogger Anti-freeze 0.929.002.002 – POWERCOOL DC 924-PXL – package size: 10 litre canister Anti-theft protection for OTT Pluvio² S 70.030.040.9.2...
  • Page 56 OTT HydroMet GmbH Ludwigstrasse 16 87437 Kempten · Germany Tel. +49 831 5617-0 Document number Fax +49 831 5617-209 70.030.001.B.E 04-0119 info@ott.com · www.ott.com...

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