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Campbell ClimaVue 40 Product Manual

Compact digital weather sensor
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PRODUCT MANUAL
ClimaVue™40
Compact Digital Weather Sensor
11/2024
Copyright © 2024
Campbell Scientific, Inc.

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  • Page 1 PRODUCT MANUAL ClimaVue™40 Compact Digital Weather Sensor 11/2024 Copyright © 2024 Campbell Scientific, Inc.

  • Page 2: Please Read First

    U.S. standard external power supply details where some information (for example the AC transformer input voltage) will not be applicable for British/European use. Please note, however, that when a power supply adapter is ordered from Campbell Scientific it will be suitable for use in your country.

  • Page 3: Table Of Contents

    Table of contents 1. Introduction 2. Precautions 3. Initial inspection 4. Overview 4.1 Liquid precipitation gauge 4.2 Anemometer 4.3 Relative humidity sensor 4.4 Thermistor 4.5 Tilt sensor 4.6 Barometric pressure sensor 4.7 Lightning sensor 5. Specifications 6. Installation 6.1 Wiring 6.2 CRBasic programming 6.3 Siting 6.4 Mounting...
  • Page 4 8. Troubleshooting and maintenance 8.1 Maintenance and calibration 8.2 Troubleshooting Appendix A. Determining True North and sensor orientation Appendix B. Example program Appendix C. Sensor configuration using CRBasic Table of Contents - ii...

  • Page 5: Introduction

    Ensure the ClimaVue 40 is properly wired to the data logger before applying power. Applying power when incorrectly wired could damage the ClimaVue 40 beyond repair. When mounting the ClimaVue 40 to the mast, do not over-tighten the V bolt as it will cause the plastic to break.

  • Page 6: Initial Inspection

    4. Overview All sensors are integrated into a single, small, form-factor unit, requiring minimal installation effort. With a robust design that prevents errors because of wear, the ClimaVue 40 is ideal for long-term, remote installations. Upon power up, the ClimaVue 40 initializes an internal timer to 55. This internal timer is incremented by 1 every second and resets to 0 after incrementing to 59.

  • Page 7: Liquid Precipitation Gauge

    CR350 series 4.1 Liquid precipitation gauge The ClimaVue 40 has a 9.31-cm (3.67 in) diameter rain-collection funnel. A spring in the funnel acts as a filter to keep out large particles, while also allowing enough flow to avoid water backing up.

  • Page 8: Anemometer

    The ClimaVue 40 calculates wind speed by measuring differences in the time it takes for sound to travel back and forth between the transducers.

  • Page 9: Tilt Sensor

    After initial leveling with a small level or the built-in bubble level, the internal tilt sensor helps users keep the ClimaVue 40 level. Regularly check the X and Y tilt data. Adjust the ClimaVue 40 leveling if it has tilted. More than two degrees off level can cause errors in the rain measurements.
  • Page 10 0.3 m/s or 3%, whichever is greater – 10 s gust Wind direction 0 to 359° 1° ±5° Precipitation 0 to 1500 mm/hr 0.017 mm ±5% of measurement from 0 to 1000 mm/hr Tilt ±90 0.1° ±1° ClimaVue 40 Compact Digital Weather Sensor...
  • Page 11 Figure 5-1. Vapor pressure accuracy at different temperatures and relative humidity Figure 5-2. Relative humidity accuracy at different temperatures and relative humidity Diameter (includes rain gauge filter): 10 cm (4 in) Height: 34 cm (13.4 in) ClimaVue 40 Compact Digital Weather Sensor...

  • Page 12: Installation

    6.4.2 Mounting procedure 6.4.3 Optional bird spike kit 6.1 Wiring The ClimaVue 40 can be directly read by a MeteoPV, CR6, CR1000X-series, or Modbus RTU RS- 485 network (Table 6-1 [p. 9]). Other Campbell Scientific data loggers can use an MD485 multidrop interface to read the RS-485 output.

  • Page 13: Crbasic Programming

    6.2 CRBasic programming The RS-485 output can be directly read by a CR6-series, CR1000X-series, CR350-series, or Modbus RTU RS-485 network. Other Campbell Scientific data loggers can use an MD485 multidrop interface to read the RS-485 output. A CR6, CR1000X, or CR350-series data logger programmed as a Modbus client can retrieve the...

  • Page 14: Siting

    6.4 Mounting The ClimaVue 40 includes a V-bolt for mounting to a pipe with a nominal outer diameter of 31.8 to 50.8 mm (1.25 to 2.0 in). The CM310 mounting pole is recommended to mount the ClimaVue 40 with a small enclosure and solar panel (no other sensors). The ClimaVue 40 can mount to a...

  • Page 15: Mounting Procedure

    (Figure 6-2 [p. 11]). Figure 6-2. ClimaVue50, MetSENS, or WindSonic Mounting Pipe Kit and crossarm 2. Loosely mount the ClimaVue 40 to the tripod mast, CM300-series pole, or mounting tube by using the V-bolt, washers, and nuts (Figure 6-3 [p. 11]).
  • Page 16 The angle of the instrument mount may need to be adjusted if the mast is not vertical. Shims can be added between the top of the mast and the bottom of the ClimaVue 40 to achieve level. The sensor must be within ±2° of dead level (0, 0) in both the X and Y directions to accurately measure rainfall.

  • Page 17: Optional Bird Spike Kit

    8. Secure the cable to the crossarm (if applicable) and tripod or pole by using cable ties. 6.4.3 Optional bird spike kit The optional bird-spike kit helps discourage birds from roosting on the ClimaVue 40. The kit consists of a plastic ring with flexible spikes. When installed, the spikes point upwards and extend 10.2 cm (4 in) above the funnel.
  • Page 18 5. Tug upward on each spike to make sure the spike is pressed in. 6. Position the ring on top of the ClimaVue 40. Figure 6-7. Bird-spike kit mounted properly 7. Press finished bird deterrent onto the ClimaVue 40 funnel to at least the depth shown in Figure 6-7 (p. 14).

  • Page 19: Operation

    Default Modbus address 1 7.2 Input register map ClimaVue 40 measurements are accessed using the input register (function code 4). All measurements are 32-bit values that span two registers. Each 32-bit value is aligned on an even register address (for example, 0x100, 0x102, 0x104). Both registers comprising a 32-bit value must be read for the 32-bit measurement data reported to be valid.
  • Page 20 Vapor pressure (kPa) point 32-bit single-precision floating- 1024 to 1025 Atmospheric pressure (kPa) point 32-bit single-precision floating- 1026 to 1027 Relative humidity (%) point 32-bit single-precision floating- 1028 to 1029 Relative humidity sensor temperature (°C) point ClimaVue 40 Compact Digital Weather Sensor...

  • Page 21: Device Identity Registers

    Firmware version (encoded as (Major*100) 3007 + Minor ASCII string 8 chars + 2 null 3008 to 3012 Sensor model number (CVUE40) terminators 3013 RH Daughterboard Serial Number Non-Customer-Facing Device Identity Registers 3200 Firmware Major Version ClimaVue 40 Compact Digital Weather Sensor...

  • Page 22: Holding Registers

    Vendor (2: CVUE40) 7.5 Snow and ice accumulation The ClimaVue 40 is not heated, so it will not measure frozen precipitation until snow and ice that have accumulated in the funnel melt. In locations with heavy snowfall or long periods below freezing, snow will fill the funnel and no longer accumulate, leading to inaccurate precipitation measurements even when the precipitation melts.

  • Page 23: Heavy Rain And Strong Wind

    That value (dP) is then added to the absolute pressure measurement returned by the ClimaVue 40 as seen in the example program. Once that is done, the program shows the pressure conversion to hPa. U. S. Standard Atmosphere and dry air were assumed when Eq.

  • Page 24: Troubleshooting And Maintenance

    (Figure 8-2 [p. 21]), and plate (Figure 8-3 [p. 22]). CAUTION: Do not touch the temperature sensor when cleaning, because it is very delicate and can be damaged if pushed into the body. ClimaVue 40 Compact Digital Weather Sensor...
  • Page 25 Figure 8-1. Temperature sensor and ultrasonic transducer openings Figure 8-2. Top view of ClimaVue 40 ClimaVue 40 Compact Digital Weather Sensor...
  • Page 26 Gently clean the sonic transducers and do not allow water to enter the ultrasonic sensors (Figure 8-1 [p. 21]). Water may corrode the metal parts inside the sensors and ruin them. 3. Clean around posts and between crevices using a dry brush. ClimaVue 40 Compact Digital Weather Sensor...
  • Page 27 Replace the funnel by lining up the lock/unlock label located on the side of the funnel with the notch on the interface plate. g. Press the funnel down against the spring and turn clockwise until it clicks in place. ClimaVue 40 Compact Digital Weather Sensor...

  • Page 28: Troubleshooting

    Check the level of the ClimaVue 40 (either with a torpedo level, bubble level, or the built-in tilt sensor). Figure 8-5. Rain gauge cutout 6. Relative humidity and barometric pressure maintenance. A field-replaceable module contains the barometric pressure and relative humidity sensors. This module is under the...
  • Page 29 Maintenance and calibration [p. 20]). 2. Check the sensor level. The ClimaVue 40 must be within approximately ±2 degrees of dead level (0, 0) in both the X and Y directions to accurately measure rainfall. If not within this range, drops from the flared hole can miss the gold electrodes entirely. Use a torpedo level, the bubble level, or the internal tilt measurements to confirm the ClimaVue 40 is level.

  • Page 30: Appendix A. Determining True North And Sensor Orientation

    1. Establish a reference point on the horizon for True North. 2. Sighting down one pair of the ClimaVue 40 north south posts, aim the pair at True North. If the wind is blowing and a flag or banner can be used to determine the true wind direction, the data logger displayed wind direction reading can be compared to the true wind direction.
  • Page 31 Figure A-1. Magnetic declination for the conterminous United States (2015) Figure A-2. Declination angles east of True North are subtracted from 360 to get True North ClimaVue 40 Compact Digital Weather Sensor...
  • Page 32 Figure A-3. Declination angles west of True North are added to 0 to get True North ClimaVue 40 Compact Digital Weather Sensor...

  • Page 33: Appendix B. Example Program

    Appendix B. Example program CRBasic Example 1: CR1000X program that measures the ClimaVue 40 'CR1000X Series Datalogger 'This example program reads the ClimaVue 40 All-in-One 'weather sensor using a CR1000X data logger and the Modbus RTU protocol 'over half-duplex RS-485.
  • Page 34 CRBasic Example 1: CR1000X program that measures the ClimaVue 40 Alias CV40(15) = RelHumidityTemp : Units RelHumidityTemp=DegC Alias CV40(16) = SingleOrientation : Units SingleOrientation=degrees Alias CV40(17) = Tmin : Units Tmin=DegC Alias CV40(18) = Tmax : Units Tmax=DegC Alias CV40(19) = NorthWindSpeed :...
  • Page 35 CRBasic Example 1: CR1000X program that measures the ClimaVue 40 'Read 22 32-bit big-endian data values from ClimaVue 40, 'starting at input register address 1000 ModbusClient(MBstat,ComC5,9600,ADDR,4,CV40(),1001,22,RETRIES,MB_TO,2) 'Call Output Tables CallTable CV40_Table NextScan EndProg ClimaVue 40 Compact Digital Weather Sensor...

  • Page 36: Appendix C. Sensor Configuration Using Crbasic

    Parameters can be configured using a CRBasic program. The following CRBasic example program toggles the baud rate. This program assumes the ClimaVue 40 is connected to the C5 terminal of the CR1000X data logger. The example program can also be downloaded at www.campbellsci.com/downloads/climavue40-example-programs...
  • Page 37 DataInterval (0,1,Sec,10) Minimum (1,Batt_volt,FP2,False,False) Sample (1,PTemp,FP2) Sample (1,Precipitation,IEEE4) Sample (1,PrecipDrops,UINT4) Sample (1,PrecipTips,UINT4) Sample (1,PrecipitationEC,IEEE4) 'Sample (1,Strikes,UINT4) 'Sample (1,StrikeDistance,IEEE4) Sample (1,WindSpeed,IEEE4) Sample (1,WindDirection,IEEE4) Sample (1,GustWindSpeed,IEEE4) Sample (1,AirTemperature,IEEE4) Sample (1,Vapor_Pressure,IEEE4) Sample (1,AtmPressure,IEEE4) Sample (1,RelHumidity,IEEE4) Sample (1,RelHumidityTemp,IEEE4) ClimaVue 40 Compact Digital Weather Sensor...
  • Page 38 EndIf 'Set change_baud to true to initiate a baud rate toggle change_baud = true change_baud = false current_baud = 9600 current_baud = 19200 ModbusClient(stat4,ComC5,9600,ADDR,6,1,4402,1,RETRIES,TIMEOUT,3) ElseIf current_baud = 19200 current_baud = 9600 ModbusClient(stat5,ComC5,19200,ADDR,6,0,4402,1,RETRIES,TIMEOUT,3) EndIf EndIf ClimaVue 40 Compact Digital Weather Sensor...
  • Page 39 CRBasic Example 2: Baud rate toggle CR1000X program 'Call Output Tables CallTable CV40_Table NextScan EndProg ClimaVue 40 Compact Digital Weather Sensor...

  • Page 40: Limited Warranty

    2. The defect cannot be the result of misuse. 3. The defect must have occurred within a specified period of time; and 4. The determination must be made by a qualified technician at a Campbell Scientific Service Center/ repair facility.
  • Page 41 Campbell Scientific’s Terms, the provisions of Campbell Scientific’s Terms shall prevail. Furthermore, Campbell Scientific’s Terms are hereby incorporated by reference into this Warranty. To view Terms and conditions that apply to Campbell Scientific, Logan, UT, USA, see Terms and Conditions ...
  • Page 42 Please state the faults as clearly as possible. Quotations for repairs can be given on request. It is the policy of Campbell Scientific to protect the health of its employees and provide a safe working environment. In support of this policy, when equipment is returned to Campbell Scientific, Logan, UT, USA, it is mandatory that a “Declaration of Hazardous Material and...
  • Page 43 Comply with all electrical codes. Electrical equipment and related grounding devices should be installed by a licensed and qualified electrician. Only use power sources approved for use in the country of installation to power Campbell Scientific devices. Elevated Work and Weather Exercise extreme caution when performing elevated work.
  • Page 44 Periodically (at least yearly) check electrical ground connections. WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR MAINTENANCE OF TRIPODS,...
  • Page 45 Campbell Scientific Regional Offices Australia France Spain Location: Garbutt, QLD Australia Location: Montrouge, France Location: Barcelona, Spain Phone: 61.7.4401.7700 Phone: 0033.0.1.56.45.15.20 Phone: 34.93.2323938 Email: info@campbellsci.com.au Email: info@campbellsci.fr Email: info@campbellsci.es Website: www.campbellsci.com.au Website: www.campbellsci.fr Website: www.campbellsci.es Brazil Germany Thailand Location: São Paulo, SP Brazil...

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