CAMPBELL SCIENTIFIC

First Quarter 2009 Vol. 20, Issue 1

Renewable Energy Applications p. 4

Remembering Bert Tanner p. 2

Repair and Calibration Department p. 3 Prewired Enclosures Simplify Installation p. 7 Campbell’s New Pressure Transducer p. 8 Campbellsci.com Gets a User Forum p. 8 Campbell Scientific Centro Caribe p. 11 Price List and Newsletter Changes p. 11 In Memoriam—Bert Tanner Paul Campbell, President

Lab. Joining Campbell Scientific in Beginning in 2002, Bert was instru- President’s Message Message President’s 1978, he managed research and devel- mental in the measurement system opment projects as well as an effective commissioning for ChinaFLUX, an group of application engineers and extensive network measuring CO2 sales, marketing, and support staff. fluxes in various ecosystems in China.

Bert’s life expressed integrity, loyalty In addition to his employment, Bert and leadership; these will be missed served on many professional commit- by his colleagues around the world. tees and boards. Among those at the Bert played a significant role in the top of his list are service as a director y dear customers and friends, growth, development, and diversity of on the Council on Agriculture Science Mwith feelings of sadness and Campbell Scientific. As vice president and Technology (CAST) and Fellow warm memories, I dedicate this mes- and director, he contributed to the of the American Society of Agronomy. sage to honor the life of Bertrand D. company’s international recognition Despite the rigors of his manage- Tanner, deceased 16 September 2008 for innovative instrumentation. Bert rial role in a dynamic company, Bert in Salt Lake City, Utah, from esopha- was noted by colleagues as one of managed to author and coauthor 15 geal cancer. For many of you, Bert was the few who insisted that theoretical chapters and academic papers. the face of the company. For many of models require experimental verifica- us, he was our heart and soul. tion. He had a sincere interest in the At the time of Bert’s death, the lines from Walt Whitman came to my “Oh Captain! My Captain! our fearful trip is done; The ship mind—“Oh Captain! My Captain! has weather’d every rack, the prize we sought is won…” our fearful trip is done; The ship has weather’d every rack, the prize we Bert’s work ranged from Forest Service careers of young scientists, and a keen sought is won . . . .” smoke-jumper in his early years to vice eye for talent at its early stages. Many president of Marketing and Customer environmental scientists acknowledge Bert will be missed, but he will not be Service at Campbell Scientific, Inc., his influence in their careers. forgotten. His passion for science, his for the last 28 years of his life. He quest for excellence, and his integrity spent time with the US Army Reserve, Bert led in the development of are values we are committed to carry University of Wisconsin Department automated weather stations, sonic on at Campbell Scientific. As we do of Geophysics, US Department of anemometers for measuring turbulent so, I am confident that our work and Navigational Oceanographics, and as transport in the atmosphere, eddy service will add to the legacy that Bert a research meteorologist with the US covariance systems, and tunable- was so much a part of in the field of Forest Service Central Sierra Snow diode-laser trace-gas-analysis systems. scientific endeavor.

The Bertrand D. Tanner/Campbell Scientific Scholarship Fund at Utah State University has been established to honor his many contributions to environmental science. If you are so inclined, you may direct donations to: Bertrand D. Tanner/Campbell Scientific, Inc., Scholarship Fund, Utah State University, 1420 Old Main Hill, Logan, UT 84322-1420. Bert was a master’s graduate in biometeorol- ogy from Utah State University, and the scholarship fund will be used for graduate study in that field.

2 Campbell Update Vol. 20 Issue 1 Repair Department Spotlight Department Dennis Anderson, Director of Business Development

t Campbell Scientific, we take rization) number that you can use for Apride in designing and manufac- returning the product. turing reliable measurement prod- ucts that can be counted on, even When a product comes in for repair in unforgiving environments. We or recalibration, our goal is to have it maintain this dedication to quality serviced, tested, and delivered to our while keeping a focus on value and shipping department in five days or economy. However, our products are less—though there can be seasonal not immune to every natural event, to variation. We are very conscientious accidents, or to the occasional com- about this. We find that most of the ponent failure and may need profes- time we meet this goal, and we meet sional repair. We also understand the weekly to discuss those that don’t make By comparing the before and after cali- role that recalibration has in keeping it. Sometimes we do have to wait for bration readings, you can determine measurements accurate and reliable. paperwork to be submitted from a how often recalibration should occur. A group of 10 dependable individu- customer. Accessories not manufac- A sound approach is to recalibrate after als in our Repair Department work to tured directly by Campbell Scientific two years and then extend or reduce provide these important services. may need to be returned to the original the time interval based on the results of vendor, taking extra time. the recalibration. Many companies treat their repair and calibration departments as profit We have a skilled staff of technicians Campbell Scientific has recently centers. At Campbell Scientific, we dedicated to fixing products right. We partnered with a laboratory accredited view ours as an extension of our troubleshoot to the component and by the National Voluntary Laboratory commitment to producing qual- identify the exact source of a problem. Accreditation Program (NVLAP) to ity products. You have a significant In the event of a high component better serve those who require calibra- investment in our products and our failure rate, we communicate this infor- tion under ISO 17025. Allow at least intent is to service them at reasonable mation to Engineering so products can three extra weeks for this service. rates and get them back in the field as be redesigned. quickly as possible. When considering your recalibration Our products have a history of long- schedules, keep in mind that Decem- If you think you may need a repair, term field operation, and we provide ber, January, and February provide the first step is always to talk to one of repair for as long as we can get replace- an opportune time to prepare for the our application engineers. They have a ment parts. We still routinely service summer field season. An RMA number great deal of experience and knowledge 21X and CR10 dataloggers—products is also required for recalibrations, but and do an excellent job of verifying that were first released in the 1980s. you do not need to talk to an applica- if a repair is necessary or determin- tion engineer. ing which component in a system is In addition to repair, we view our faulty. This reduces cost and increases calibration services as an important If we can be of assistance contact us at efficiency for both you and us. When part of maintaining measurement (435) 750-9535 or visit our website at a problem is identified, we’ll issue you fidelity. Because analog measurement campbellsci.com/repair. an RMA (return merchandise autho- drift is influenced by the environ-

ment, it is difficult to give an absolute Mission Statement guideline for recommended intervals Winter 2008 • Volume 19, Issue 1 of recalibration. Many units are still We, in the Repair Department, strive to respond Executive Editor Neal Israelsen within specifications after five or six promptly to the customer in order to meet their Managing Editor Lex Shakespear years if used in moderate conditions, needs and requests in a timely manner. We collect Assistant Editors Linda Worlton meaningful data and produce reports providing Patrick Burt while others are outside of specifica- feedback to continually enhance product and Anthony Bodily tions within a year or two of operating in extreme environments. design quality. www.campbellsci.com 3 Renewable

Featured Application Featured Energy

enewable resources account for Below we list typical monitoring ap- solar thermal, and concentrated Ronly a small percentage of the plications in four of the most com- solar power. energy the world consumes. The drive mon renewable-energy areas: wind, • Site-assessment systems quantify to reduce our dependence on fossil solar, hydropower, and geothermal. a site’s suitability for solar energy fuels and produce energy from more production. environmentally friendly sources has Wind • System-performance packages led to an increasing number of proj- Our systems are used in every stage of correlate incoming solar radiation ects to develop these resources. wind-power operations. with DC/AC output for manufactur- • Wind-assessment systems provide er-specification validation and The use of our dataloggers in renew- data to determine the suitability power-production maximization. able-energy applications is nothing of sites for wind power and the best • Comprehensive diagnostic kits new, but the recent surge of interest wind turbine to use. pinpoint system failures, provide in renewable resources has triggered • Turbine-performance systems alarm capabilities, and collect a corresponding increase in the need monitor power generated and valuable data for preventive for quality measurements. available wind to help verify manu- maintenance. facturers’ turbine specifications. Because of this increased activity, we • Wind-forecasting stations placed Hydropower recently created a new application- strategically provide local meteo- Dams require a more diverse set of engineering group dedicated to sup- rological data that can be combined measurements. porting those who are developing or with regional weather patterns • Reservoir level-monitoring systems conducting research on these critical to predict future wind and forecast above the dam provide information renewable resources. Our extensive power generation. for operating the power plant and experience combined with the ver- maintaining the dam. satility of our dataloggers can prove Solar • Equipment-performance systems valuable to those who need quality Campbell Scientific dataloggers are monitor operational factors, such as measurements for their projects. used in all types of solar energy ap- RPMs on turbines, and can provide plications, including photovoltaic, condition-based alarms. When the success of multimillion- Continued on back page dollar wind or solar farms can be determined by a difference of less than one percent between measured and actual values of wind speed or sunlight, some have found out the hard way that quality measurements matter. The need for making quality measurements over long periods of time, in harsh, remote sites (where renewable systems are often located), is what has attracted people to our dataloggers for years.

4 Campbell Update Vol. 20 Issue 1 Case Studies Case Study Retailer Goes Solar

ecreational Equipment, Inc., R(REI) is a national retail chain that has made a corporate commit- ment to renewable energy. They have a bold plan, not only to install photovoltaic systems on their new stores, but also to retrofit exist- ing solar installations to maximize Photo courtesy of Blue Oak Energy energy production. A key component of their solar strategy is the incentive Data is collected remotely, analyzed, performing outside of expected values state governments pay to increase the and formatted into Draker’s perfor- or has problems. They can then take number of solar installations. mance interface for easy viewing over steps to improve performance so that the web. REI uses this web-based their systems generate as much elec- REI chose Blue Oak Energy to design software tool to view data essential for tricity from solar power as possible. and build their solar-electric generat- the incentive payments, and also to ing systems, and Draker Laboratories manage real-time performance of the The combination of verifying incen- to develop a system to collect the solar power-generating system. tive qualification and maximizing electricity-production data needed to system production is critical to ensur- earn incentives from the State of Cali- The standard performance package ing REI’s return on investment. The fornia. Draker uses their own Sentalis includes two pyranometers (plane- real-time access to field data collected 1000PV monitoring system for this. of-array and horizontal), a back-of- by the CR1000 and presented over the Campbell Scientific CR1000 datalog- module temperature sensor, and a web allows for rapid response to issues gers are at the core of these systems production meter. All of these sensors and minimizes down time. Draker’s because of their field robustness, and Campbell’s CR1000 datalogger customers have come to trust the reli- measurement accuracy, number of are used in concert to clearly illus- ability of the CR1000 and the ease of channels, and ability to communicate trate system performance and to send use of the data it provides. with power equipment in the field. alarms to the system’s operators if it is campbellsci.com/rei-solar

Improved Voice Modem Available New Product

Campbell Scientific’s COM320 Voice-Synthesizer Modem is smaller, lighter, and costs less than its predecessor, the COM310. The COM320 gives speech capability to a CR800, CR850, CR1000, or CR3000 datalogger, thus enabling the user to call the datalogger for a spoken summary of real-time or historical data. When used as a standard phone modem, the COM320 can communicate faster than the old COM310, which transmitted data at 9600 bps. Communication rates up to 115.2 kbps between the COM320 and data- logger are supported. (Your phone lines may limit transmission rate.) www.campbellsci.com 5 The Train in Case Study Case Case Study Case Spain . . .

r. Joan Girona of the Institute Dof Agroalimentary Research and Technology in Catalonia, Spain, studies irrigation and the water and nutrient needs of fruit trees. In a recent study, he wanted to measure the absorption of photosynthetically active radiation (PAR) for use in analyzing growth and fruit produc- tion issues. Transpiration from fruit movement. To get enough measure- along the track, and electromagnetic trees and overall evapotranspira- ments in a net of this sort, they would detectors on the train sensed these tion in orchards is closely related to need more than 1200 sensors, along markers and signaled the datalog- absorption of solar radiation by the with the associated dataloggers and ger to take a measurement at each tree canopy, so this study would help multiplexers—impossible with the point. Dr. Girona tried both Campbell researchers more accurately measure resources available. Scientific’s CR800 and CR216, but these processes. settled on the CR800 because of the As they thought about how to get higher reading frequency he needed. The more measurements he could measurements from so many points, make, the truer Dr. Girona’s results they came up with a way to move the The thousands of measurements would be, so he tried a few methods sensors around the measurement area taken each run are downloaded to a to accurately capture the needed data. precisely and quickly. They mounted computer and provide a bounty of First he set up a network of 32 sen- the instruments—Apogee pyranom- data for the researchers. This innova- sors at various points on the ground eters and Campbell Scientific datalog- tive solution to a measurement need around the fruit trees to measure gers—on small-scale model trains and proved so productive that the scien- light as it came from many angles. Dr. ran the system on carefully laid-out tists are building a new system with a Girona and his co-researchers found tracks covering a large area around few improvements, and plan to run it that the values were too distant from trees in an orchard. They placed on many different orchards in 2009. each other for good modeling of sun metal markers every couple of inches campbellsci.com/spain-train

Faster GPS Receiver

Garmin’s GPS16X-HVS Global Positioning Satellite (GPS) Receiver has

New Product replaced the GPS16-HVS on our price list. The new receiver is easier to install in the field and is configured to output data at a faster baud rate. Installation is easier because its cable terminates in stripped and tinned leads that connect directly to the datalogger. The cable of the older model was fitted with an RJ-45 connector, which required an adapter to connect it to the datalogger. Campbell Scientific also configures the GPS16X-HVS to output industry-standard RMC and GGA data strings at 38400 bps instead of 1200 bps. Our dataloggers can directly read the RMC and GGA data strings.

6 Campbell Update Vol. 20 Issue 1 Prewired Enclosures Simplify Installation New Products

No time to wire your Campbell sure mounting Scientific system? Let us do it for bracket are you. Campbell Scientific’s new chosen as PWENC-series enclosures combine options. You flexibility with ease of use. You still order the data- have the flexibility to choose your logger, sensors, system components, but installation power supply, is easy because the sensors are simply communica- attached to prewired connectors on tion option, the outside of the enclosure—elimi- and instrument nating the sometimes tedious chore mount separately. of wiring sensor leads into the data- Compatible sensors, logger’s terminal strips. If you want peripheral cables, and solar panels to simplify your setup even more, have a –PW extension on their model Campbell Scientific will even creates a name. The cables for these products custom datalogger program. are fitted with connectors that mate with the enclosure’s connectors. You Connectors eliminate the work of wiring sen- sor leads to the datalogger’s terminals. Right: We offer the enclosure in our three can attach the enclosures to any of sensor side of a connector (outside the enclo- largest standard sizes. Connectors, our tripods or towers, or to a user- sure). Left: datalogger side of the enclosure communication ports, and the enclo- supplied pipe. (inside the enclosure).

Present-Weather Sensor New Portable 30-ft Mast Campbell Scientific now has a portable, 30-ft instrument mount. The CM375 consists of five 6-ft galvanized pipes, a stainless-steel base, guy cables, duck-bill anchors, and a guy-wire tensioning kit. All of the compo- nents fit inside an 80-in.-long bag that is included with the mount.

The CM375 is fast and easy to set up. Two people can assemble the pipes and tilt up the mast within minutes. To reinforce the mount, the CM375 is guyed at 12-ft and 24-ft heights. Duck-bill anchors and the guy-wire tensioning kit ensure proper guying.

The PWS100, manufactured in the New Peripheral Cables UK by Campbell Scientific, Ltd., determines precipitation and visibil- Campbell Scientific has developed five new generic cables for connect- ity parameters for road, marine, and ing to peripheral devices. These cables have a rugged Santoprene jacket airport automated weather stations. instead of a PVC jacket. The number of conductors ranges from two to A unique optical system and a laser- five, allowing you to choose the cable that fits your specific application. based light source allow the PWS100 By default, the conductors are stripped and tinned. The new cables can to accurately determine the velocity also be fitted with a connector for attachment to a prewired enclosure (see and size of falling precipitation. Two article above). separate detectors and laser-Doppler anemometry techniques improve • CABLE2CBL—22 AWG, 2 conductor upon current present-weather sensors • CABLE3CBL—22 AWG, 3 conductor and enable the PWS100 to accurately • CABLE4CBL—22 AWG, 4 conductor determine individual particle velocity • CABLE5CBL—24 AWG, 5 conductor and size to within 5 percent. • CABLEPCBL—16 AWG, 2 conductor www.campbellsci.com 7 Campbell’s New Pressure Transducer Wind Sentry Upgraded

RM Young’s 03002 Wind Sentry New Products set is now available from Campbell Scientific for measuring wind speed and direction. Wind Sentry sets Over the years, we’ve offered sub- scale total-error band over a 0° to 60°C consist of a three-cup anemometer mersible pressure transducers from temperature range. and a wind vane mounted to a small various manufacturers for measuring crossarm. A junction box was added pressure, depth, or level in hydro- The CS450 generates a precision to the new 03002, which logical applications. This year we are excitation, then outputs a value that allows one pleased to announce that we have corresponds to the water pressure. It cable to connect the designed and are now producing our outputs either a digital SDI-12 or an entire wind own pressure transducer, the CS450. RS-232 signal. All of our contem- set to the We designed the CS450 with the goal porary dataloggers, as well as many datalogger. of offering a high-quality instrument retired dataloggers, are compatible. The old 03001 and providing shorter lead times for used two ordering and recalibration. The standard CS450 is 8.4 in. long, cables—one for and has a stainless-steel case; a the anemometer and one The new transducer measures pressure titanium case is available for use in for the wind vane. with a static accuracy within 0.1% full- corrosive environments.

Campbellsci.com Gets a User Forum

We’re pleased to announce that around the world to share knowledge products. Many also have extensive we’ve added a new user forum to our and experience. application-specific knowledge and Company News Company website to help you collaborate with experience. other users of Campbell Scientific The new resource is a user-to-user equipment. If you are familiar with forum, so while you’ll see some input Online forums become more useful other forums on the Internet, you from the various Campbell Scientific as their user base grows and as the know what this means—the ability offices, over time you’ll notice more amount of useful information that’s to ask your questions, answer others’ external users participating. Many archived grows. As more find out questions, and collaborate with users long-time Campbell users have exten- about the new forum, we expect it to sive knowledge develop into a useful resource with an about how to con- active community behind it. figure our Please note that the new forum is not a technical support forum and does not replace any of our current techni- cal support channels. For technical support, you are still free to call us or visit campbellsci.com/questions— though you shouldn’t hesitate to look for answers first on the forum or to post your question there.

If you would like to participate in the forum, you can register by visiting campbellsci.com/forum.

8 Campbell Update Vol. 20 Issue 1 Monitoring a Case Study Sinking Highway

hen the Ohio Department of WTransportation (Ohio DOT) was preparing to widen Interstate 77, they discovered that part of the high- way located over an abandoned un- derground coal mine was subsiding. To stabilize the roadbed, they decided to backfill the mine voids with cement grout while traffic was maintained on the highway. Due to the potential for the deformation is determined by the personnel, indicating the location of additional mine subsidence during re- reflected pulse travel time. the alarm condition. mediation work, Ohio DOT required the installation of a real-time monitor- GeoTDR installed coaxial cables in The system’s operation was proven ing system to activate an alarm when a trench and also in horizontal holes valid when the road repair construc- movement or settlement of the road drilled 5 ft or more beneath each lane tion work would occasionally deform base occurred. Ohio DOT retained of the entire section of highway. They or sever cables as crews drilled grout GeoTDR (based on their extensive connected the cables to an SDMX50 holes. That would send alarm calls, experience) to design, install, and coaxial multiplexer and interrogated and GeoTDR personnel confirmed monitor a time-domain reflectometry the cables using a TDR100 Time- that alarm sources were consistent (TDR) system. Domain Reflectometer, both from with locations of construction activity. Campbell Scientific. A Campbell A TDR system works by sending a CR10X datalogger controlled the Not only did this system safeguard the voltage pulse along a cable. At each automated monitoring system, Ohio highway, but provided valuable location where the cable is deformed, including callback capability with lessons for alarm systems on subse- a reflected pulse is returned to the the COM300 Voice-Synthesizer quent projects. The most recent of unit. The ratio of the reflected pulse Modem. Whenever cable deformation these TDR systems use CR1000 data- magnitude shows the magnitude of exceeded a preset alarm threshold, the loggers and wireless communication. cable deformation, and the location of datalogger initiated a call to GeoTDR campbellsci.com/odot

New Temperature and RH Probe on the Horizon New Product

Campbell Scientific will soon offer Vaisala’s HMP155 Temperature and Relative Humidity (RH) Probe. This new probe will eventually replace the HMP45C. Improvements over the HMP45C include a wider operating-temperature range, more-accurate RH measurements, more-accurate tem- perature measurements, a wider temperature-measurement range, and lower power consumption. The HMP155 is longer than the HMP45C, and uses the 41005-5 14-plate Gill Radiation Shield.

www.campbellsci.com 9 Marine Case Study Case Meteorology on the Red Sea

he northern head of the Gulf of TEilat is an ecologically unique marine system of utmost environ- mental and economic importance. The unique setting of desert con- verging with coral reefs has brought about accelerated development of the tourist industry. At the same time, the marine ecological system has IUI contracted with Meteo-Tech to year Meteo-Tech performs preven- undergone a gradual decline. The integrate and install a system to mea- tive maintenance, including accu- reasons behind the decline observed sure the meteorological conditions racy checks, cleaning, and bearing in the marine habitats of Eilat are not needed for the database. The program replacement. fully understood, but may include required continuous measurements, waste and disturbance of the ecosys- both at a coastal station and an open- The open-water station is situated on tem by the Eilat sea port, tourism, water station, of air temperature, a floating buoy about 1 km off shore. marine aquaculture, and urbaniza- relative humidity, wind speed and It is based on a Campbell CR800 tion of Eilat. direction, and water temperature. The Measurement and Control Datalog- coastal station also measures baro- ger. The station started operating on A cooperative Israeli-Jordanian effort metric pressure, solar radiation, and July 2008. Unfortunately, a com- through the Interuniversity Institute sea level. mercial ship collided with the buoy for Marine Sciences at Eilat (IUI) and heavily damaged it. The station determined that a permanent, ac- The coastal station is situated on the was insured, so a rebuilding of the cessible database of meteorological IUI pier, about 30 m off shore. At the station is expected soon. Over time, measurements would facilitate the core is a Campbell Scientific CR1000 the database will grow into a valuable formation of scientific recommenda- Measurement and Control Datalog- resource for climatological analysis in tions to preserve the delicate marine ger. The station started operating the region. ecosystem of the gulf. on September 2006, and twice a campbellsci.com/eilat

Larger Solar Panel Available

The new SP70 solar panel has a 70-W typical peak

New Product power; its predecessor, the SP65, had a 65-W typical peak power. This new solar panel recharges the user- supplied 12-V flooded battery used in systems with large power requirements, such as eddy covariance systems. An external regulator is required to con- nect the SP70 to the battery. Two SP70 solar panels can be attached to the same regulator to double the power output.

10 Campbell Update Vol. 20 Issue 1 New Affiliate—Campbell Scientific Centro Caribe New Product

Campbell Scientific recently opened a new office in Central America. The new entity is known as Campbell Scientific Centro Caribe, S.A. (CSCC). Centro as in Central America, and Caribe as in Caribbean, indicate the territory of this new af- filiate office. The countries covered by CSCC are: Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, Panama, and the Dominican Republic. These are territories where Spanish is the principal language or a key language.

Otton Brenes (to the left of Paul Campbell in photo) has been named president of the new office. He has been our Costa Rican representative for 15 years.

Typical uses of Campbell Scientific gear in this territory are hydrology, meteorol- ogy (especially hurricane prediction instruments), and agriculture.

Price List and Newsletter Changes

Price List searchable file that is always up to date, This year we’re moving to a quarterly Instead of mailing a printed copy of and reduce paper consumption. We’re schedule and changing to an email our price list, we are now making it calling the area where we make the and online format. However, our available on line. This will provide a price list available our Customer Cen- first quarter issue will still be avail- ter, and we’ll be offering other services able in print. You can manage your there that will help you manage your newsletter subscriptions in the new dealings with us. Customer Center.

Newsletter Customer Center accounts are avail- We’re also making some changes to able to employees of organizations this newsletter, the Campbell Update. that have purchased equipment from For years we’ve mailed two issues per Campbell Scientific. To register, visit year—one in January and one in July. campbellsci.com/register.

USB Spread-Spectrum Metric Version of Rain New Products Radios Coming Gage Now Available

We are releasing three new spread- Campbell Scientific now offers the spectrum radios: the 900-MHz RF430, new TB4MM Hydrological Services 922-MHz RF435, and 2.4-GHz RF440. tipping-bucket rain gage in addition to These radios are functionally the same the TB4 and CS700. The new TB4MM as our RF401 series, but have a USB is a metric version of the TB4, and port instead of the CS I/O port. The measures rainfall in 0.2-mm increments USB port allows greater compatibility instead of 0.01-in. increments. As with with today’s computers. The radios the other Hydrological Services rain gages, connect with the datalogger via the the TB4MM includes a siphoning mecha- RS-232 port. Because a CS I/O port is nism that allows the rain to flow at a steady not provided on the radios, they can- rate regardless of rainfall intensity. The not be attached to some of our older siphon reduces typical rain-bucket errors dataloggers. However, networks can and produces accurate measurements contain a mixture of RF430/440-series over a range of 0 to 700 mm/hr. and RF401-series radios. www.campbellsci.com 11

Calendar

January 11-15 TRB 88th Annual Meeting Washington DC Renewable Energy 11-15 American Meteorological Phoenix, AZ Continued from page 4 14-16 Four States Irrigation Council Fort Collins, CO • Water-quality systems monitor 28-29 Unified Wine & Grape Symposium Sacramento CA parameters such as temperature and February turbidity to help minimize the im- 3-5 DistribuTECH San Diego, CA pact on fish and other wildlife. 5-7 Golf Industry Show New Orleans, LA 12-14 World Ag Expo Tulare, CA • Structural-monitoring systems keep 13-16 TechAdvantage New Orleans, LA an eye on bore holes and cracks to 15-18 Aquaculture America 2009 Seattle, WA 22-24 Heli-Expo 2009 Anaheim, CA help identify problems with dams.

March Geothermal 03-06 Rural Water Association of Utah St. George UT Geothermal applications typically April involve measuring water temperature, 07-09 USGS – WTRAC Data Conference Salt Lake City, UT level, and flow. 20-23 Western Snow Conference Canmore Alberta, Canada • Monitoring systems at observation May wells define the flow of groundwa- 4-6 AWRA Spring Specialty Conference Anchorage, AK ter and the hydraulic effects on the 4-7 WindPower 2009 Chicago IL 17-21 ASCE/EWRI Kansas City, MO surrounding area—helping to deter- 18-22 Great Lakes Research Toledo, OH mine a site’s suitability for geother- 18-21 National Hydrologic Warning Council Vail, CO mal projects or to plan well spacing. June • Temperature-profiling systems pro- 3-6 US Committee on Irrigation and Drainage Reno, NV vide data on temperature gradients 14-17 International Bridge Conference Pittsburgh, PA in well casings. 14-17 WEDA 29 Tempe AZ 16-19 A&WMA Detroit, MI • Monitoring systems track time/tem- 21-24 ASABE 2009 Reno, NV perature data, water levels, and water quality parameters, providing valu- July 26-29 Fatigue Fracture 2009 Philadelphia, PA able decision-making data. 27-30 WaterPower XVI Spokane, WA We look forward to providing key August 1-5 APS Annual American Phytopathology Portland. OR components that help develop renew- 2-7 94th ESA Annual Meeting Albuquerque NM able resources. Our new group will be 16-20 StormCon Anaheim CA actively creating resources to facilitate 23-27 National Rural ITS Conference Seaside, OR the use of measurement and control September systems in this area. If you would like 27-1 Dam Safety 2009 Hollywood FL more information, please visit 24-25 AWEA Wind Assessment Conference campbellsci.com/renewables. October 04-07 Geothermal Energy Expo Reno, NV 18-21 GSA 2009 Portland, OR 26-29 Oceans 2009 MTS/IEEE Biloxi, MS 27-29 Automotive Testing Novi, MI 28-30 NALMS Hartford, CT

November 1-5 ASA 2009 Annual Meeting Pittsburgh, PA 1-5 CERF 2009 Portland, OR

December 2-4 Irrigation Show 2009 San Antonio, TX 14-18 AGU San Francisco, CA 11-13 Performance Racing Industry Orlando, FL Visit our web site for training class schedules and additional listings.

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WHEN MEASUREMENTS MATTER

Campbell Scientific, Inc. 12 815 West 1800 North Campbell Update Vol. 20 Issue 1 Logan UT 84321 435-753-2342