INSTRUCTION MANUAL UT20 and UT30 Tower-based Weather Stations Revision: 9/14 C o p y r i g h t © 1 9 9 3 - 2 0 1 4 C a m p b e l l S c i e n t i f i c , I n c .
Limited Warranty “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service for twelve months from the date of shipment unless otherwise specified in the corresponding product manual. (Product manuals are available for review online at www.campbellsci.com.) Products not manufactured by CSI, but that are resold by CSI, are warranted only to the limits extended by the original manufacturer.
Assistance Products may not be returned without prior authorization. The following contact information is for US and international customers residing in countries served by Campbell Scientific, Inc. directly. Affiliate companies handle repairs for customers within their territories. Please visit www.campbellsci.com to determine which Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA), contact CAMPBELL SCIENTIFIC, INC., phone (435) 227-9000.
Precautions DANGER — MANY HAZARDS ARE ASSOCIATED WITH INSTALLING, USING, MAINTAINING, AND WORKING ON OR AROUND TRIPODS, TOWERS, AND ANY ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC. FAILURE TO PROPERLY AND COMPLETELY ASSEMBLE, INSTALL, OPERATE, USE, AND MAINTAIN TRIPODS, TOWERS, AND ATTACHMENTS, AND FAILURE TO HEED WARNINGS, INCREASES THE RISK OF DEATH, ACCIDENT, SERIOUS INJURY, PROPERTY DAMAGE, AND PRODUCT FAILURE.
Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction ................................................................. 1 2. Cautionary Statements ............................................... 1 2.1 2.2 2.3 Site Selection ....................................................................................... 1 Tower Mounting .........................................................
Table of Contents 8. Preparing the Tower for Use ....................................20 8.1 8.2 8.3 8.4 8.5 Enclosure, Datalogger, Power Supply ............................................... 20 8.1.1 Enclosure.................................................................................... 20 8.1.2 CR1000 Datalogger .................................................................... 23 8.1.3 BPALK Alkaline Power Supply ................................................ 23 8.1.
Table of Contents 9.1 Maintenance ....................................................................................... 56 9.1.1 Instrumentation Maintenance...................................................... 56 9.1.2 Batteries ...................................................................................... 56 9.1.3 Desiccant..................................................................................... 56 9.1.4 Sensor Maintenance ............................................................
Table of Contents 8-12. You can configure any two types of interface ports (RS-485, RS-232, and CS I/O) to be used at a time ...................................... 35 8-13. Enclosure Supply Kit ........................................................................ 36 8-14. Met One 034B Wind Speed and Direction Sensor ............................ 37 8-15. 05103 RM Young Wind Monitor ...................................................... 38 8-16. 03002 mounted to a CM200-series Crossarm ....................
UT20 and UT30 Tower-based Weather Stations 1. Introduction The UT20 and UT30 are durable, lightweight instrument towers that can be used for a variety of applications. They support a 6 m (20 ft) or 9 m (30 ft) measurement height for wind sensors as well as sturdy attachment points for antennas, solar panels, environmental enclosures, radiation shields, and crossarms. 2. Cautionary Statements 2.1 2.2 Site Selection • Select a safe site to install the tower.
UT20 and UT30 Tower-based Weather Stations 2.3 3. Tower Installation • Properly assemble the tower according to instructions (do this where the tower is to be put up). • Once the tower is up in the full vertical position, securely fasten it to the base using 5/8-inch nuts and washers. • Ground the tower according to the National Electrical Code. Initial Inspection 3.1 Indoors • • 3.2 2 Immediately upon receipt of your shipment… o Open shipping cartons. o Check contents against invoice.
UT20 and UT30 Tower-based Weather Stations 3.3 Tools Required Tools required to install and maintain a weather station are listed below. 3.3.
UT20 and UT30 Tower-based Weather Stations Pliers Conduit and associated tools (as required) Felt-tipped marking pen Claw hammer Pipe wrench (12 in) Tape measure (12 to 20 ft) 3/8 in nut driver Level (36 to 48 in) Pliers Climbing harness Hard hats 50 ft haul rope Crescent wrench Channel-lock pliers 1/4 in washers (spacers for U-bolts) 5/64 in Allen hex wrench 3.3.
UT20 and UT30 Tower-based Weather Stations Standard measurement heights: 3.0 m ± 0.1 m recommended (AASC) 2.0 m ± 0.1 m, 10.0 m ± 0.5 m optional (AASC) 10.0 m (WMO and EPA) 4.2 Temperature and Relative Humidity Sensors should be located over an open level area at least 9 m (EPA) in diameter. The surface should be covered by short grass, or where grass does not grow, the natural earth surface.
UT20 and UT30 Tower-based Weather Stations 4.4 Solar Radiation Pyranometers should be located to avoid shadows on the sensor at any time. Mounting it on the southernmost (northern hemisphere) portion of the weather station will minimize the chance of shading from other weather station structures. Reflective surfaces and sources of artificial radiation should be avoided. The height at which the sensor is mounted is not critical. 4.
UT20 and UT30 Tower-based Weather Stations 3 The State Climatologist, (1985) Publication of the American Association of State Climatologists: Height and Exposure Standards for Sensors on Automated Weather Stations, v. 9, No. 4 October, 1985. 4 EPA, (1989). Quality Assurance Handbook for Air Pollution Measurement Systems, EPA Office of Research and Development, Research Triangle Park, North Carolina 27711. 5.
UT20 and UT30 Tower-based Weather Stations 6. Specifications UT20 Measurement Height: 6 m (20 ft) UT30 Measurement Height: 10 m (30 ft) UT20 Shipping Weight: 23 kg (50 lb) UT30 Shipping Weight: 29 kg (65 lb) Material: hardened drawn 6063-T832 aluminum Vertical Pipe Outer Diameter: 2.5 cm (1 in) Cross Support Pipe Outer Diameter: 0.953 cm (0.375 in) UT20 Guyed Tower Area Requirements: ~3.5 m (11.
UT20 and UT30 Tower-based Weather Stations 7. UT20/UT30 Tower Installation 7.1 Installing the UT20/UT30 The UT20/UT30 tower provides a support structure for mounting the weather station components. FIGURE 7-1 shows a typical UT20/UT30 equipped with an instrumentation enclosure, meteorological sensors, and a solar panel. FIGURE 7-1. UT20/UT30 weather tower 7.1.1 Base and Guy Anchor Layout The UT20/UT30 tower attaches to a user-supplied concrete foundation as shown in FIGURE 7-1.
UT20 and UT30 Tower-based Weather Stations ground, lay out the two remaining anchor locations 10 feet from the first anchor to the scribed line on either side of the base stake. FIGURE 7-2. Guy anchor locations On unlevel ground, use a compass at the base stake to lay out the remaining two anchor locations 120 degrees from the first. Vary the distance between the tower and each anchor so that the angle between the tower and the guy wire will be approximately 30 degrees. 7.1.
UT20 and UT30 Tower-based Weather Stations 7-3. Align each J-bolt so the angled portion is pointing outward and tighten the lower nuts to secure the assembly. FIGURE 7-3. J-bolt template assembly 3. Construct a concrete form as shown in FIGURE 7-4 out of 2-inch x 4-inch lumber, 24 inches square (inside dimensions). Construct the 1-inch x 2inch template frame and set it aside. Center the form over the hole and drive a stake centered along the outside edge of each side.
UT20 and UT30 Tower-based Weather Stations J-bolt template to the template frame with 7/8-inch screws where holes in the template overlap the wooden frame. 5. CAUTION Fill the hole and form with concrete. Screed the concrete level with the top of the form as shown in FIGURE 7-3. Smooth the concrete around the three J-bolts and allow the concrete to harden. It is common for air to be trapped behind the knee portion of a J-bolt.
UT20 and UT30 Tower-based Weather Stations 8. Check the UT20/UT30 for plumb using a level and adjust the leveling nuts below the mounting feet on the J-bolts as required. When the tower is plumb, use two wrenches to lock the leveling nuts on each J-bolt together. Tighten the upper nuts to secure the base. 9. Removing the lower 3/8-inch bolt on the rear (south) leg allows the tower to be hinged to the ground. If a ladder is available, it is easier to leave the tower upright. 7.1.2.
UT20 and UT30 Tower-based Weather Stations FIGURE 7-6. B18 concrete mounting base RFM18 Mounting Hole (4) places FIGURE 7-7. RFM18 flat roof mounting base Tower → Eyebolt Cement Foundation FIGURE 7-8.
UT20 and UT30 Tower-based Weather Stations 7.1.4 Tower Assembly 1. Having previously installed the base and bottom tower section (Section 7.1.3, UTDUK Duckbill Guy Anchor), remove the bolt from the rear tower leg, and loosen the bolt in the side legs so the bottom tower section is free to hinge. Tilt the tower section to the ground and assemble the remaining sections and mast using the hardware provided with the tower. 2. Install the guy wires to the top of the tower (FIGURE 7-10).
UT20 and UT30 Tower-based Weather Stations Drive Bar Duckbill Anchor FIGURE 7-9. UTDUK duckbill guy anchor U-bolts (2) places FIGURE 7-10.
UT20 and UT30 Tower-based Weather Stations U-bolt (2) places Thimble Turnbuckle FIGURE 7-11. Guy wire/turnbuckle attached to UTEYE anchor Clamp Ground Rod FIGURE 7-12.
UT20 and UT30 Tower-based Weather Stations Wire to Enclosure Clamp Wire to Ground Rod FIGURE 7-13. Tower grounding clamp 7.2 Sensor Mounting Brackets Sensor mounting brackets provide a means of mounting the sensors to the tower. General orientation of the mounting brackets is shown in FIGURE 7-14. 7.2.1 CM202, COM202SS, CM203, CM204, CM204SS, or CM206 1. Attach the crossarm at the desired height via the provided U-bolts and nuts (FIGURE 7-15). 7.2.2 Gill Radiation Shields 7.2.2.
UT20 and UT30 Tower-based Weather Stations 1" NU-RAIL Enclosure UT018 Crossarm Lightning Rod Ground Rod NORTH UT30 RFM18 019ALU Crossarm 3/4" NU-RAIL FIGURE 7-14. Top view of tower FIGURE 7-15.
UT20 and UT30 Tower-based Weather Stations FIGURE 7-16. CM225 Solar Radiation Mount with a LI2003S Leveling Base and LI200X Solar Radiation Sensor 8. Preparing the Tower for Use 8.1 Enclosure, Datalogger, Power Supply 8.1.1 Enclosure All instrumentation (datalogger, power supply, and communication peripherals) are mounted in the enclosure. A PVC bulkhead port is installed in the enclosure for routing the sensor and communication cables to the instrumentation.
UT20 and UT30 Tower-based Weather Stations 3. Reattach the bracket to the enclosure using the original bolts and nuts. 4. Position the enclosure on the north side of the mast. 5. Place the enclosure at the desired height. Please note that the recommended lead lengths for our sensors assume the bottom of the enclosure is 3 feet from the ground. 6. Use the furnished 1.5-inch U-bolts to secure the enclosure to the tower legs. 7.
UT20 and UT30 Tower-based Weather Stations Flange Section Flange Section FIGURE 8-2. This exploded view shows the components of a “-TM” bracket option FIGURE 8-3.
UT20 and UT30 Tower-based Weather Stations 8.1.2 CR1000 Datalogger The CR1000 datalogger and PS100 12 V power supply mount to the enclosure backplate as shown in FIGURE 8-5. Two screws (pn 447) attach the CR1000, four screws (pn 505) attach the PS100. 8.1.3 BPALK Alkaline Power Supply The BPALK battery pack houses eight alkaline “D” cell batteries (FIGURE 8-4). To install the batteries, loosen the thumb screw and remove the cover. 1.
UT20 and UT30 Tower-based Weather Stations FIGURE 8-4. BPALK 12 volt power supply 8.1.5 SP10 Solar Panel Solar panels purchased from Campbell Scientific are shipped with a charge plug taped to the back of the panel. The charge plug is not used with the PS100. Refer to the solar panel manual for installation instructions. 1. Mount the SP10 solar panel to the mast, facing south (northern hemisphere) as shown in FIGURE 8-6. Position the SP10 at the top of the 1 1/4 inch diameter section of the mast.
UT20 and UT30 Tower-based Weather Stations FIGURE 8-5. CR1000 and PS100 mounted to an enclosure backplate FIGURE 8-6.
UT20 and UT30 Tower-based Weather Stations 8.2 Sensor Connection 1. After the sensors have been mounted, route the sensor leads through the entry hole in the bottom of the enclosure and to the datalogger. Secure the leads to the left side of the enclosure using cable ties and tabs (FIGURE 8-7). Any excess cable should be neatly coiled and secured to the tabs. 2.
UT20 and UT30 Tower-based Weather Stations 8.3 Communication and Data Storage Peripherals One or more peripherals (i.e., CompactFlash modules, modems, etc.) can be mounted to the enclosure backplate (ENC12/14, ENC14/16, or ENC16/18 enclosures). 8.3.1 CFM100, NL115, or NL120 Connect the CFM100, NL115, or NL120 module to the CR1000’s peripheral port (see FIGURE 8-8). One CompactFlash card fits in the CFM100 or NL115’s card slot.
UT20 and UT30 Tower-based Weather Stations FIGURE 8-9. COM220 modem with surge protector 8.3.3 Cellular Transceivers Campbell Scientific offers two digital cellular modems — the RavenXTV CDMA modem and the LS300G 3G GSM Cellular Gateway modem. Refer to our product brochure for information on choosing the right cellular modem for your weather station. Mount the digital cellular modem in the enclosure as shown in FIGURE 8-10 with the following steps: 28 1.
UT20 and UT30 Tower-based Weather Stations 8.3.4 SRM-5A Rad Modem and SC932A Interface Rad Modems enable communication between the datalogger and computer over 4-wire unconditioned telephone line, or cable with two twisted pairs of wires. The maximum distance between modems is determined by baud rate and wire gauge. At 9600 baud the approximate range is 5.0 miles using 19 gauge wire, 4.0 miles using 26 gauge wire.
UT20 and UT30 Tower-based Weather Stations 3. Route the cable from the remote SRM-5A, and the cable from the SRM5A attached to the computer to the 6361. Connect the cables as shown in FIGURE 8-12. Strain relief the cables using cable ties and tabs. FIGURE 8-10.
UT20 and UT30 Tower-based Weather Stations Datalogger Computer FIGURE 8-11.
UT20 and UT30 Tower-based Weather Stations 8.3.5 RF500M RF Modem and RF310-Series Transceivers Radiotelemetry (RF) enables communications between one or more dataloggers and the computer over an FCC-assigned radio frequency in the VHF or UHF band. The maximum distance between any two communicating stations is approximately 20 miles and must be line-of-sight. Longer distances and rough terrain may require intermediate repeater station(s).
UT20 and UT30 Tower-based Weather Stations There are five configuration options for the RF500M 1. RF ID – Set the modem address with a value from 1-255. Each RF500M in the network must have a unique RF ID. 2. CS I/O Settings – Set the CS I/O interface options.
UT20 and UT30 Tower-based Weather Stations the RF500M. Set the appropriate configuration options in the RF500M with DevConfig depending on the port connected to the PC. 8.3.5.3 Install Nearest Repeater/Field Station Now install the nearest field station. If it communicates with the base station via a repeater, the repeater station must also be installed. Make sure the correct RF ID has been configured in the RF500M that is being deployed in the remote field station or repeater location.
UT20 and UT30 Tower-based Weather Stations 4. Connects to another MD485 via the CABLE2TP-L three conductor 22-AWG cable Attach the barrel plug of the pn 15966 wall charger to the MD485’s Pwr port, then plug the wall charger into an AC outlet. Connects to a PC via the pn 10873 cable Connects to the datalogger CS I/O port via an SC12 cable FIGURE 8-12. You can configure any two types of interface ports (RS-485, RS-232, and CS I/O) to be used at a time 8.
UT20 and UT30 Tower-based Weather Stations percentage of humidity. Desiccant packs inside the enclosure should be replaced with fresh packs when the upper dot on the indicator begins to turn pink. The indicator card does not need to be replaced unless the colored circles overrun. FIGURE 8-13.
UT20 and UT30 Tower-based Weather Stations 8.5 Sensor Installation Sensor leads should be routed down the North side of the mast to the enclosure and secured with cable ties. 8.5.1 034B Met One Windset Mount the 034B to the CM202, CM204, or CM206 crossarm as shown in FIGURE 8-14. 1. Mount the CM220 bracket on the crossarm via the U-bolt and nuts. 2. Place the 034B stem and bushing into the CM220 bracket. 3. With the shoulder screw in place, orient the counter weight to point due south.
UT20 and UT30 Tower-based Weather Stations 8.5.2 05103, 05103-45, 05106, and 05305 RM Young Wind Monitors Mount the Wind Monitor to the CM202, CM204, or CM206 crossarm as shown in FIGURE 8-15. 1. Attach the CM220 bracket on the crossarm via the U-bolt and nuts. 2. Position the top of the mounting post 5 inches above the CM220 and tighten the set screws. 3. Slide the orientation ring and the Wind Monitor onto the mounting post. Rotate the sensor base so that the square wiring box points south.
UT20 and UT30 Tower-based Weather Stations 8.5.3 03002 RM Young Wind Sentry Wind Set The 03002 can be mounted directly to the mast, or to a crossarm. 8.5.3.1 03002 Mounted to the Mast 1. Slide the crossarm mounting bracket onto the mast. Orient the crossarm so the vane end points north, and tighten the band clamp (see Section 8.5.18, Wind Direction Sensor Orientation, for final calibration). 2. Attach the cup assembly to the anemometer shaft using the Allen wrench provided. 8.5.3.
UT20 and UT30 Tower-based Weather Stations 8.5.4 Licor Silicon Radiation Sensors (LI200X, LI200S, LI190SB) Mount the Radiation Sensor to the LI2003S Base and Leveling Fixture as shown in FIGURE 8-17. 1. Position the base of the sensor in the mounting flange on the LI2003S, and tighten the set screw with the Allen wrench provided. Adjust the three leveling screws flush with the bottom of the LI2003S. 2. Mount the LI2003S to the CM225 (Section 7.
UT20 and UT30 Tower-based Weather Stations 8.5.5 107/108 Temperature Probe Mount the 107 temperature probe inside the 41303-5A or UT6P 6-Plate Gill Radiation Shield as shown in FIGURE 8-18. 1. Loosen the two mounting clamp screws on the base of the radiation shield. Insert the 107 probe through the mounting clamp until the white heat shrink is even with the bottom of the clamp. 2. Tighten the two screws evenly until the clamp is snug against the sensor lead. FIGURE 8-18. 107 Temperature Probe 8.5.
UT20 and UT30 Tower-based Weather Stations 8.5.7 HMP60 Vaisala Temperature and RH Probe Mount the HMP60 probe inside the 41303-5A 6-Plate Gill Radiation shield as shown in FIGURE 8-19. 1. Loosen the two mounting clamp screws on the base of the radiation shield. Insert the HMP60 sensor through the clamp until the base of the sensor is even with the bottom of the clamp. Tighten the two screws evenly until the clamp is snug against the sensor base. 41303-5A HMP60 FIGURE 8-19.
UT20 and UT30 Tower-based Weather Stations 8.5.8 HC2S3 Rotronic Temperature and RH Probe Mount the probe inside the 41003-5 Gill Radiation shield as shown in FIGURE 8-20. 1. Loosen the split plastic nut on the base of the shield. Insert the probe and tighten the nut. 41003-5 HC2S3 FIGURE 8-20.
UT20 and UT30 Tower-based Weather Stations 8.5.9 HMP155A Vaisala Temperature and RH Probe Mount the probe inside the 41005-5 14-Plate Gill Radiation shield as shown in FIGURE 8-21. 1. Loosen the split plastic nut on the base of the shield. Insert the probe and tighten the nut. 41005-5 HMP155A FIGURE 8-21. HMP155A Vaisala Temperature and RH Probe 8.5.10 CS100 or CS106 Vaisala Barometric Pressure Sensor Mount the barometer to the enclosure backplate. 1.
UT20 and UT30 Tower-based Weather Stations 8.5.11 Texas Electronics Tipping Bucket Rain Gages (TE525, TE525WS, TE525MM) 1. Mount the rain gage to a vertical pipe as shown in FIGURE 8-22. Mounting the gage directly to the tripod or tower is not recommended. 2. Dig a 6-inch diameter hole 24 inches deep. 3. Center a 1 1/4-inch to 2-inch IPS pipe in the hole and fill the hole with concrete. Use a level to plumb the pipe as the hole is filled. 4.
UT20 and UT30 Tower-based Weather Stations 8.5.12 TB4, TB4MM, or CS700 Rain Gage The rain gage should be mounted in a relatively level spot that is representative of the surrounding area. The lip of the funnel should be horizontal and at least 30 inches above the ground. The ground surface around the rain gage should be natural vegetation or gravel. Often the rain gage is mounted to a CM300series pole. The pole can be embedded directly in a concrete pad.
UT20 and UT30 Tower-based Weather Stations 8.5.13 SR50A Sonic Ranging Sensor 8.5.13.1 Beam Angle When mounting the SR50A, the sensor’s beam angle needs to be considered (see FIGURE 8-24). It is always best to mount the SR50A perpendicular to the intended target surface. The SR50A has a beam angle of approximately 30 degrees. This means that objects outside this 30 degree beam will not be detected nor interfere with the intended target. Any unwanted target must be outside the 30 degree beam angle.
UT20 and UT30 Tower-based Weather Stations FIGURE 8-25. Distance from edge of transducer housing to grill 8.5.13.3 Mounting Options There are two standard mounting options available for the SR50A sensor. The first is the SR50A Mounting Kit, pn 19517. This bracket is used to mount the SR50A to a CM206 crossarm or a pipe with a 1-inch to 1.75-inch OD. FIGURE 8-26 and FIGURE 8-27 show a couple of angles of the SR50A mounted to a crossarm.
UT20 and UT30 Tower-based Weather Stations FIGURE 8-27. The SR50A mounted to the crossarm shown from another angle FIGURE 8-28.
UT20 and UT30 Tower-based Weather Stations 8.5.14 CS616 Water Content Reflectometer Probe rods can be inserted vertically or horizontally into the soil surface or buried at any orientation to the surface. A probe inserted vertically into a soil surface will give an indication of the water content in the upper 30 cm of soil. Horizontal installation will detect the passing of wetting fronts. Insertion at a 30 degree angle with the surface will measure water content in the upper 15 cm of soil.
UT20 and UT30 Tower-based Weather Stations 8.5.15 237 Leaf Wetness Sensor Mounting and orientation considerations are left to the user to determine. Consult the 237 manual for preparation and other information. Normally, the sensor is mounted away from the meteorological tower in or near a plant canopy. FIGURE 8-30.
UT20 and UT30 Tower-based Weather Stations 8.5.16 257 Soil Moisture Sensor 1. Soak the sensor end of the 257 in irrigation water for 12 to 14 hours. Allow the sensor to dry for 1 to 2 days after soaking and repeat the soak/dry cycle twice to improve sensor response. Always install a wet sensor. 2. Install the sensor into soil representative of the field conditions you wish to monitor. Avoid high or low spots.
UT20 and UT30 Tower-based Weather Stations 8.5.17 Enclosure Humidity Sensor Mount the CS210 inside the environmental enclosure or onto a datalogger using the mounting block and the wire tie included with the sensor (FIGURE 8-32). NOTE The black outer jacket of the cable is Santoprene® rubber. This compound was chosen for its resistance to temperature extremes, moisture, and UV degradation. However, this jacket will support combustion in air. It is rated as slow burning when tested according to U.L. 94 H.
UT20 and UT30 Tower-based Weather Stations 1. Establish a reference point on the horizon for True North. 2. Sighting down the instrument center line, aim the nose cone, or counterweight at True North. Display the input location for wind direction using the *6 Mode of the datalogger, or, the Monitor Mode of LoggerNet with an on-line PC. 3. Loosen the band clamps or set screws that secure the base of the sensor to the mast or crossarm.
UT20 and UT30 Tower-based Weather Stations 8.5.18.2 National Geophysical Data Center Web Site This web site facilitates the task of determining magnetic declination for your weather station. The web site uses longitude and latitude to determine declination. Customers located in the US can find their site’s longitude and latitude. For international customers, a link is provided to help them determine their longitude and latitude. FIGURE 8-34.
UT20 and UT30 Tower-based Weather Stations 9. Maintenance and Troubleshooting These guidelines apply to several different Campbell Scientific weather stations. 9.1 Maintenance Proper maintenance of weather station components is essential to obtain accurate data. Equipment must be in good operating condition, which requires a program of regular inspection and maintenance. Routine and simple maintenance can be accomplished by the person in charge of the weather station.
UT20 and UT30 Tower-based Weather Stations Desiccant packs inside of the dataloggers do not require replacement under normal conditions. 9.1.4 Sensor Maintenance Sensor maintenance should be performed at regular intervals, depending on the desired accuracy and the conditions of use. A suggested maintenance schedule is outlined below. 1 week • Check the pyranometer for level and contamination. Gently clean, if needed. • Visually inspect the wind sensors and radiation shield.
UT20 and UT30 Tower-based Weather Stations 2 years • Calibrate the solar radiation sensors (some users suggest yearly). • Calibrate the temperature sensor. • Replace the wind vane potentiometer and bearings. 4 to 5 years • 9.2 Replace sensor cables as required. Troubleshooting 9.2.1 No Response Using the Keypad Check keypad response after each of the following steps. A. Make sure the battery has been installed, and the power switch, if any, is “ON”. B.
UT20 and UT30 Tower-based Weather Stations E. Check the cable(s) between the serial port and the modem. If cables have not been purchased through Campbell Scientific, check for the following configuration using an ohm meter: 25-pin serial port: computer end modem end 2 3 7 20 2 3 7 20 9-pin serial port: computer end modem end 2 3 4 5 3 2 20 7 F. Make sure the modem is properly configured and cabled (Section 8.3, Communication and Data Storage Peripherals). G.
UT20 and UT30 Tower-based Weather Stations 10.2 Weather Station or Datalogger Support Suite Use of VisualWeather, PC400, or LoggerNet enables interfacing with the weather station through Windows. Follow the installation procedure outlined in the front of the software manual. These software packages download programs to the weather station datalogger, monitor data, and retrieve data stored in the datalogger. 10.
Appendix A. RFM18 Base Dimensions Dimensions of the RFM18 Base and spacing of the mounting holes are shown in the drawing below.
Appendix A.
Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com • info@campbellsci.com Campbell Scientific Centro Caribe S.A. (CSCC) 300 N Cementerio, Edificio Breller Santo Domingo, Heredia 40305 COSTA RICA www.campbellsci.cc • info@campbellsci.cc Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za • cleroux@csafrica.co.za Campbell Scientific Ltd.
