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ET101 Weather Station
Revision: 12/97
C o p y r i g h t
( c )
1 9 9 3 - 1 9 9 7
C a m p b e l l
S c i e n t i f i c ,
I n c .

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Summary of Contents for Campbell ET101

  • Page 1 ET101 Weather Station Revision: 12/97 C o p y r i g h t ( c ) 1 9 9 3 - 1 9 9 7 C a m p b e l l S c i e n t i f i c ,...
  • Page 2 CAMPBELL SCIENTIFIC, INC. CAMPBELL SCIENTIFIC, INC. will return such products by surface carrier prepaid. This warranty shall not apply to any CAMPBELL SCIENTIFIC, INC. products which have been subjected to modification, misuse, neglect, accidents of nature, or shipping damage. This warranty is in lieu of all other warranties, expressed or implied, including warranties of merchantability or fitness for a particular purpose.
  • Page 3: Table Of Contents

    Tower Grounding ET INSTRUMENTATION INSTALLATION ..............3-1 Enclosure, Datalogger, Power Supply Sensor Connection Communication and Data Storage Peripherals Sealing and Desiccating the Enclosure ET101 REDUCED SENSOR SET INSTALLATION .............4-1 Reduced Sensor Set Installation Components Installation Sensor Connection Pyranometer Soil Temperature Sensor (Optional)
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  • Page 5: Preparation And Siting

    SECTION 1. PREPARATION AND SITING These guidelines apply to several different Campbell Scientific weather stations. 1.1 INSTALLATION TASKS Install instrumentation enclosure (Section 3) 1.1.1 INDOORS Install sensors (Section 4) Immediately upon receipt of your shipment… UT30 (10 meter tower) tower stations: Open shipping cartons.
  • Page 6 SECTION 1. PREPARATION AND SITING UT10 Materials for UTDUK Duckbill Anchors Tape measure (12' to 20') Sledgehammer Level (24" to 36") Highlift jack Chain (to attach jack to anchor Pick or digging bar loops) Claw Hammer Materials for RFM18 Base: Materials for concrete form: (3) anchors appropriate for Hand saw...
  • Page 7: Siting And Exposure

    SECTION 1. PREPARATION AND SITING UT30 1.3.1 WIND SPEED AND DIRECTION Tape measure (12' to 20') Wind sensors should be located over open level 3/8" nut driver terrain, and at a distance of at least ten times Level (36" to 48") (EPA) the height of any nearby building, tree or Pliers other obstruction, as illustrated in Figure 1.3-1.
  • Page 8 SECTION 1. PREPARATION AND SITING Collectors should be heated, if necessary, to chance of shading from other weather station properly measure frozen precipitation. The structures. Reflective surfaces and sources of gage must be mounted above the average level artificial radiation should be avoided. The height of snow accumulation in areas that experience at which the sensor is mounted is not critical.
  • Page 9: Determining True North For Wind Vane Orientation

    SECTION 1. PREPARATION AND SITING Declination angles east of True North are 1.4 DETERMINING TRUE NORTH FOR considered negative, and are subtracted from 0 WIND VANE ORIENTATION degrees to get True North as shown Figure 1.4-2. Magnetic declination, or other methods to find True Declination angles west of True North are con- North, should be determined prior to installing the sidered positive, and are added to 0 degrees to get...
  • Page 10 SECTION 1. PREPARATION AND SITING Query Form 1: Latitude/Longitude 1.4.1 NSSDC CGM SERVICE Latitude/Longitude below specified in: The NSSDC CGM (Corrected Geomagnetic) Geographic Service provides an easy way of determining Year (from 1945 to 2000): 1998 magnetic declination of a specific site. Since Altitude above Earth's surface (km) [from 0.
  • Page 11 SECTION 1. PREPARATION AND SITING Magnetic declination is bold in this example to References show its location in the table. A positive EPA, (1987). On-Site Meteorological Program declination is east, while a negative declination Guidance for Regulatory Modeling Applications, is west. The declination in this example is EPA-450/4-87-013.
  • Page 13: Et Tower Installation

    CAUTION: Do not fit the 3 meter ET Tower sections together until the appropriate time. Once attached, they cannot be detached. The ET Tower provides a support structure for mounting the ET101 and ET106 weather station components. Figure 2.1-1 shows a typical ET Tower installation option. The tower is designed to withstand winds of 100 mph.
  • Page 14: Base Installation

    SECTION 2. ET TOWER INSTALLATION cavity should be about 4 inches deep and 2.1 BASE INSTALLATION just large enough in diameter to insert one 2.1.1 SUPPLIED COMPONENTS end of the conduit. Make certain the cavity "points" in the direction from which power (3) ½...
  • Page 15: Tower Installation

    SECTION 2. ET TOWER INSTALLATION 3. Thread communications and power cables 2.2 TOWER INSTALLATION through the tower and conduit. Electrical 2.2.1 SUPPLIED COMPONENTS fish tape will help. (1) Upper Tower Section (Tapered) 4. Cut and save a 9 inch piece of 12 AWG (1) Lower Tower Section ground wire from the 12 foot length (6) ½...
  • Page 16: Tower Grounding

    SECTION 2. ET TOWER INSTALLATION 2.3 TOWER GROUNDING 2.3.1 SUPPLIED COMPONENTS (1) 5 foot 4 AWG Ground Cable (1) Copper Ground Lug, Bolt (1) Ground Rod, Clamp Refer to Section 1 for components supplied by installer. 2.3.2 GROUNDING PROCEDURE Ground the tower as shown in Figure 2.2-1. 1.
  • Page 17: Et Instrumentation Installation

    (1) Flat Point Screw Driver (1) Power Supply Option (1) Telecommunications Option (1) 9 inch piece of 12 AWG ground wire (1) Lightning rod and clamp Logan, Utah MADE IN USA ET101 ET106 FIGURE 3-1. ET101 and ET106 Instrumentation Mounted on the ET Tower...
  • Page 18: Enclosure, Datalogger, Power Supply

    SECTION 3. ET INSTRUMENTATION INSTALLATION the enclosure back and connected 3.1 ENCLOSURE, DATALOGGER, to the CHG ports by depressing POWER SUPPLY connector levers. Polarity of the 3.1.1 BATTERY OPTION INSTALLATION CHG connection does not matter. Install the rechargeable battery and a) Alkaline Option: The BPALK plug the battery lead into the houses 8 "D"...
  • Page 19 SECTION 3. ET INSTRUMENTATION INSTALLATION b) After determining the tilt angle, 9-inch loosen the two bolts that attach the Ground mounting bracket to the panel. Wire Adjust the angle, then tighten the Tower bolts. Secure the lead wire to the N O R Ground mast using wire ties.
  • Page 20: Sensor Connection

    SECTION 3. ET INSTRUMENTATION INSTALLATION 604 Ohm (LI190SB) 3.2 SENSOR CONNECTION Open (LI1200X) 1) Install the sensor set as described in Section 4. 100 Ohm (LI200S) 2) Remove the protective connector cover (HMP35C) from the back of the ET Enclosure by removing the two phillips head screws.
  • Page 21 SECTION 3. ET INSTRUMENTATION INSTALLATION 3.3.1.1 Internal Installation 3.3.2 CELLULAR PHONE TRANSCEIVER For installation inside the ET Enclosure, the CAUTION: Do not power the transceiver following components are provided in the phone until the antenna is connected! modem kit: Cellular service and programming of your (1) COM200 or COM300 Phone Modem transceiver must be coordinated with your local (1) 12 inch RJ-11 Patch Cord...
  • Page 22 Motorola M600 Transceiver COM200 or VS1 Telephone Modem Green Modem Ground Wire to Modem “GND” Green Modem Ground Terminal Wire to Recessed “GND” Lug Cellular Power Connector Blue 9 Pin Ribbon Cable (1 Extra Connector) RJ11C Patch Cord Cellular Handset Connector (normally not used) Black Transceiver...
  • Page 23 3.3.2.2 External Installation 3.3.3.1 Internal Installation The following cellular kit components are used For installation inside the ET Enclosure, the to make the external connections: following components are provided in the short- haul modem kit: (1) Cellular Antenna (1) 9 foot Coaxial Antenna Cable (1) SC932C Interface (1) Antenna Mounting Bracket (1) Rad Modem...
  • Page 24 SECTION 3. ET INSTRUMENTATION INSTALLATION At the PC: Ground the center terminal to an earth (or building) ground using the 14 AWG wire. (1) Rad Modem (1) 5 foot 4-wire Patch Cable 3) Connect the 5 foot patch cord to the Rad (1) 10 foot 14 AWG Ground Wire Modem.
  • Page 25: Sealing And Desiccating The Enclosure

    SECTION 3. ET INSTRUMENTATION INSTALLATION 3.4 SEALING AND DESICCATING THE ENCLOSURE The ET Enclosure is supplied with a desiccant pack. The desiccant maintains a low humidity in the enclosure to minimize the chance of condensation on the instrumentation. Desiccant should be changed when the internal ET Enclosure humidity sensor measures 30% or higher.
  • Page 27: Et101 Reduced Sensor Set Installation

    SECTION 4. ET101 REDUCED SENSOR SET INSTALLATION 4.1 REDUCED SENSOR SET 4.3 SENSOR CONNECTION INSTALLATION COMPONENTS Refer to Section 3.2 for sensor connection details. Connect the temperature sensor to the (1) ET101 Sensor Set ET Enclosure connector labeled "Temp / RH"...
  • Page 28: Verification And Clock Set

    0% to 30% when sealed for several hours 4.7 SENSOR SCHEMATICS Schematics of ET101 sensors and associated connectors are provided in Figures 4-1 and 4-2 for help in troubleshooting. Knowledge of the schematics is not necessary for routine installation and maintenance.
  • Page 29 SECTION 4. ET101 REDUCED SENSOR SET INSTALLATION CS 200 Connector Air Temperature Probe Datalogger Not Used Excitation Thermistor 249K OHM Temperature 1K OHM Analog Thermistor Ground 1K OHM Bottom 249K OHM Temperature Shield FIGURE 4-2. Schematic of CS200 Air Temperature Probe and Connector #7...
  • Page 31: Et Software Installation

    SECTION 5. ET SOFTWARE INSTALLATION The ET Evapotranspiration Stations are supported by PC120 "ETPro" for MS-DOS. ETPro is used to write and download the station program, and to retrieve and report data. ETPro works in conjunction with PC208 Datalogger Support Software. PC120 and PC208 each have their own manual, which should be consulted for installation procedures and operational details.
  • Page 33: Maintenance And Troubleshooting

    SECTION 6. MAINTENANCE AND TROUBLESHOOTING These guidelines apply to several different Campbell Scientific weather stations. solar panel at all times. The charge indicating 6.1 MAINTENANCE diode should be "ON" when voltage to the Proper maintenance of weather station charging circuitry is present. Be aware of...
  • Page 34: Troubleshooting

    Check the tripod or tower for structural disconnecting and reconnecting the battery. damage, proper alignment, and for level/plumb. F. If still no response, call Campbell Scientific. 6 months 6.2.2 NO RESPONSE FROM DATALOGGER THROUGH SC32A OR MODEM PERIPHERAL Clean the temperature/humidity sensor.
  • Page 35 SECTION 6. MAINTENANCE AND TROUBLESHOOTING 6.2.3 -99999 DISPLAYED IN AN INPUT LOCATION A. Make sure the battery voltage is between 9.6 and 16 VDC. B. With the MetData1 or ET106, verify that the sensor is connected to the proper bulkhead connector.
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  • Page 38 Campbell Scientific Companies Campbell Scientific, Inc. (CSI) 815 West 1800 North Logan, Utah 84321 UNITED STATES www.campbellsci.com info@campbellsci.com Campbell Scientific Africa Pty. Ltd. (CSAf) PO Box 2450 Somerset West 7129 SOUTH AFRICA www.csafrica.co.za sales@csafrica.co.za Campbell Scientific Australia Pty. Ltd. (CSA)

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