Manual Installation, Operation and Maintenance of Automatic Meteorological Stations Established in The Nile Basin Entebbe August 2001 NILE BASIN INITIATIVE Initiative du Bassin du Nil Information Products for Nile Basin Water Resources Management www.fao.
The designations employed and the presentation of material throughout this book do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization (FAO) concerning the legal or development status of any country, territory, city, or area or of its authorities, or concerning the delimitations of its frontiers or boundaries.
List of Acronyms List of Acronyms AH AWS CHG CSi DoD DSP FAO FSA G HADA ID LVBD METSTAT NBD OCV P PV RAM RH SM4M SoC SPTR SVP VP VPD Ampere Hour Automatic Weather Station Charge Campbell Scientific Depth of Discharge Data Storage Pointer Food an Agriculture Organization of the United Nations Final Storage Area Ground Terminal High Aswan Dam Authority Identification Code Lake Victoria Basin Database Meteorological Station Datalogger Programme Nile Basin Datab
Table of Contents Table of Contents 1 Introduction 11 1.1 General 11 1.2 Individual Components of the Met Station 11 1.3 Overview of the Contents of the Manual 14 2 CR10X Storage and Control Module 15 2.1 General 15 2.2 Installation 16 2.3 Use 19 2.4 Maintenance 20 2.5 Signature 20 2.6 Prompt Sheet 21 2.7 Trouble Shooting 21 3 Sensors 23 3.
Table of Contents 3.3.4 3.3.5 3.4 Maintenance Trouble Shooting CS500 Temperature and Relative Humidity Sensor 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 29 General Installation Use Maintenance Trouble Shooting 4 Power Supply 32 4.1 General 32 4.2 Sealed Rechargeable Battery 32 4.2.1 4.2.2 4.2.3 4.2.4 4.2.5 4.2.6 4.3 Solar Panel 4.3.1 4.3.2 4.3.3 4.3.4 4.3.5 4.4 38 General Installation Use Maintenance Grounding 4.5.1 4.5.2 4.5.
Table of Contents 6 5 Tripod 40 5.1 General 40 5.2 Installation 40 5.3 Maintenance 42 6 Protective Enclosure ENC12/14 43 6.1 General 43 6.2 Installation 43 6.3 Maintenance 43 6.4 Trouble Shooting 43 7 Met Station Compound 44 7.1 General 44 7.2 Construction 44 7.
List of Figures List of Figures Figure 1: Figure 2: Figure 3: Figure 4: Figure 5: Figure 6: Figure 7: Figure 8: Figure 9: Figure 10: Figure 11: Figure 12: Figure 13: Figure 14: Figure 15: Figure 16: Figure 8A: Met Station CR10X Datalogger Power Supply PS12-LA Portable Keyboard Display CR10KD and Data Storage Module SM4M Function of Various Terminals on the Wiring Panel Positioning of PS12-LA and CR10X in Protective Enclosure Tipping Bucket Rain Gage TE525 Met One
List of Tables List of Tables Table 1: Table 2: Table 3: 8 Wiring Schedule SoC Versus Open Circuit Voltage for Yuasa 7 Ahr Lead Acid Gel Battery Individual Components of Tripod Installation, Operation and Maintainance of Automatic Meteorological Stations 17 34 41
List of Boxes List of Boxes Box 1: Box 2: Box 3: Box 4: Box 5: Box 6: Box 7: Box 8: Permanent Storage of METSTAT in Program Location 8 Loading METSTAT into CR10X Storage and Control Module Temporarily De-activate Security Transfer Data Prior to Re-loading METSTAT into CR10X Determining the Geographic North Caution While Cleaning the Solar Radiation Sensor Only Use Campbell Scientific PS12-LA Only Use Campbell Scientific CH12R Charging Unit 17 18 19 21 26 29 32
Annexes Annexes Annex 1: Annex 2: Annex 3.1: Annex 3.
Introduction Introduction 1.1 General This manual presents detailed instructions for the installation, operation, and maintenance of the Automatic Weather Stations (AWS) installed in the Nile Basin by the FAO Nile Basin Water Resources Project. The monitoring equipment was procured from Campbell Scientific, USA. This company has a proven track record in Africa, and a number of Campbell Scientific AWS have been operational in the basin for several years.
Introduction Lighting Rod Pyranometer Wind Vane Anemometer Solar Panel Temperature & RH Sensor Protective Enclosure (Having D.
Introduction Figure 2: CR10X Data logger Figure 3 presents the PS12LA Power Supply. It consists of a rechargeable battery, and an integrated regulator and charging unit.
Introduction Figure 4 presents the portable keyboard display and the data storage module, which are used together to communicate with the data logger while in the field. One set can serve several stations, as these items are only used during the periodic inspection visits. The storage module is a solid, rugged instrument, and is used to transfer the measurement values from the datalogger in the field to a PC in the office.
CR10X Storage and Control Module CR10X Storage and Control Module 2.1 General The CR10X is the actual datalogger. It is an electronic storage and control system that manages the data acquisition, processing, storage, and retrieval within the Met Station. The CR10X hardware consists of (a) a measurement and control module, and (b) a detachable wiring panel.
CR10X Storage and Control Module The datalogger has two separate memories, i.e.: (1) a Flash ROM of 128 Kb for storing the operating system and various datalogger programs, and (2) a RAM of 128 Kb for data processing and storage, with a capacity of 96,000 readings. The CR10X datalogger has no internal power supply, apart from a small lithium battery for back-up purposes. Instead, the logger draws its electricity from the external PS12-LA power unit, connected to a solar panel.
CR10X Storage and Control Module Figure 6: PS12-LA and CR10X in ENC12/14 Protective Enclosure Fix the central grounding cable of the protective enclosure to the ground terminal on the CR10X wiring panel. This is essential for protecting the instrument against lightning strikes. It is also crucial for obtaining precise measurements, as sensors and datalogger need the same ground reference.
CR10X Storage and Control Module Upon toggling the PS12-LA Power Supply switch to “ON”, the program stored in location 8 of the SM4M storage module (in this case METSTAT) is automatically loaded into the CR10X, and subsequently made the active program. Make sure that the installation of all hardware components is completed before powering on the datalogger.
CR10X Storage and Control Module The last step in the installation process is protecting the system against unauthorized user interventions. For this purpose a password is introduced, which blocks access to (a) modifying the active datalogger program, (b) loading new programs, and (c) changing the memory allocations.
CR10X Storage and Control Module end, type in the following CR10KD keyboard instructions (for presentation purposes given between double quotes): “*8” (to activate Manual Data Dump using the star-eight mode) METSTAT only uses Final Storage Area 1, and star-eight mode therefore automatically continues with the selection of the output device. The display will show “01”.
CR10X Storage and Control Module The reader is referred to Annex 5, for detailed instructions on how to check the daily program signature,. A change in program signature requires that METSTAT needs to be reloaded (for the appropriate instructions to this end see paragraph 2.2). 2.6 Prompt Sheet The project has prepared a Prompt Sheet, which is intended as memory aid when going into the field to visit the Automatic Meteorological Stations.
CR10X Storage and Control Module “*8” (to activate Manual Data Dump using the star-eight mode) Since METSTAT only uses Final Storage Area 1, star-eight mode automatically continues with the selection of the output device. The display will show “01”. Type the following command: “71” (this is the code for the SM4M storage module) “A” (keyboard equivalent for ENTER) The display shows a number.
Sensors Sensors 3.1 Tipping Bucket Rain Gauge 3.1.1 General The Met Station includes a TE525 tipping bucket rain gauge made by Texas Electronics, USA. It is a smaller adaptation of the standard US Weather Bureau tipping bucket rain gauge. The instrument is equipped with two buckets, with a known volume, connected to each other by a horizontal axis balanced on a fulcrum. Rain is collected with a conventional funnel of standard diameter and directed to one of the buckets.
Sensors 3.1.2 Installation The rainfall recordings should be representative for the surrounding area. Towards this end, the user is advised to observe the following guidelines when selecting the rain gauge location: • Select a site for the Met Station that it is representative for the area.
Sensors • Check and re-level the rain gage lid. In principle no factory calibration is needed. In the unlikely event that such calibration would be required, the reader is referred to the corresponding Campbell Scientific Instruction Manual for the TE525 Tipping Bucket Rain Gauge for further instructions. 3.1.5 Trouble Shooting Problem 1: No rainfall is recorded in spite of clear evidence of a recent rain event. Remedy 1.
Sensors Wind speed is measured by the anemometer, which consists of three cups in a horizontal plane that rotate on a vertical shaft. This rotation activates a sealed reed switch. Each open-closure event of this switch generates an electric pulse, which is recorded by the datalogger. The rate of pulses is proportional to the wind speed. Wind direction is also sensed electronically. The wind vane drives a 10-kilo ohm potentiometer connected to the logger.
Sensors While orienting the cross arm and Nu-rail using a compass, please note that there is a difference between geographic and magnetic north. Figure 9 presents the current declination angle for the Lake Victoria region. needle points to magnetic north 3 degrees, 0 minutes west true north Figure 9: Declination Angle in the Lake Victoria Region 3.2.3 Operation Operation of the Met One 034A-L Wind Set is fully automatic and does not require any user intervention.
Sensors Problem 3: Recorded wind directions exceed 360 degrees. Remedy 3.1: Connect the CR10KD keyboard and use “star-six” mode to monitor the input locations. Check in Annex 4 which one is used for Wind Direction and use the “A” key to advance to this location. Manually rotate the wind vane to its maximum location; this is where the value on the keyboard jumps back to zero. Write down the maximum wind direction (e.g. 367 degrees).
Sensors The LI200X should never be shaded by the tripod tower or other sensors. Attach the pyranometer cable to the wiring panel of the CR10X logger according to table 1 in paragraph 2.2, and Annex 2, as follows: - red wire to terminal H2; - black wire to terminal L2; - white wire to left most G terminal of upper terminal block; - clear wire to next left most G terminal of upper terminal block. Remove the red protection cap after installing the sensor. Save this cap for shipping or storing the sensor. 3.
Sensors The CS500 is powered by the CR10X 12V peripheral power terminal and draws about 2 mA current while active. To conserve energy, the datalogger is programmed to deactivate the CS500 when the probe is not measuring. For detailed specifications, the reader is referred to corresponding Campbell Scientific Instruction Manual for the CS500 Temperature and Relative Humidity Probe. 3.4.2 Installation The CS500 must be housed inside a solar radiation shield.
Sensors - jumper from terminal SW 12V CTRL to terminal C1. 3.4.3 Use The operation of the CS500 is fully automatic and no user action is required. The appropriate operating instructions are included in the METSTAT datalogger program. 3.4.4 Maintenance The CS500 only requires minimal maintenance, as follows: • During each visit to the Met Station, check if the radiation shield is free from dust and debris; • Each two years, replace the humidity chip (contact Campbell Scientific). 3.4.
Power Supply Power Supply 4.1 General The Met Station is equipped with electronic sensors and an electronic datalogger. Hence electronics play an important role in the data acquisition process. Proper performance of electronic equipment depends to a large extent on a stable and reliable power supply. Failure of electronic equipment is all too often the result of power surges, power cuts and related spikes. The above clearly indicates the crucial role of the power supply in the Met Station.
Power Supply 4.2.2 Installing/Changing the Battery The PS12-LA power supply housing forms the battery holder. It is shown on figure 12, together with other elements of the power supply.
Power Supply 4.2.3 State of the Battery To avoid either deep discharge or overcharge, the amount of energy in the battery needs to be monitored. The State of Charge (SoC) is a good indicator for this. Table 2 presents the SoC for the Yuasa 7 Ahr sealed lead-acid battery as function of the voltage, for a situation when no load is attached. This is called the Open Circuit Voltage (OCV).
Power Supply Given this individual SoC-OCV relation, the user can now assess the SoC of a known lead acid battery. To this end, follow the below instructions: • Disconnect the battery from the load and/or charge; • If the battery is being charged or discharged, wait 20 minutes for the battery to stabilize; • Contact the volt meter’s lead to the positive and negative terminals of the battery, and read the voltage; • Compare the reading to individual SoC-OCV relation for the particular battery.
Power Supply damaging the plates. The user is therefore advised to only recharge the battery using the provided CH12R charger. This unit includes a regulator, which monitors the voltage and battery state, and stops charging when the battery is full. It also contains a control device that limits the recharge current to the recommended low levels. Box 8: Only Use Campbell Scientific CH12R Charging Unit Never use a fast recharger as this may destroy the battery or can even be hazardous.
Power Supply 4.3 Solar Panel 4.3.1 General The solar panel is a photovoltaic (PV) power source used for charging the sealed lead-acid battery of the Met Station. It therefore constitutes the primary energy source of the system, although it does not directly power the datalogger and sensors. The MSX10 solar panel itself does not include a regulator. Instead, the charging process is controlled by the regulator included in the PS12-LA power supply.
Power Supply 4.3.4 Maintenance The MSX10 Solar Panel requires a minimum of routine maintenance. The following is recommended: • To improve the panel’s efficiency, clean the glass plate during each visit with a soft, lightly moistened cloth. Do not use any abrasive pad or cleaner, as this may permanently scratch the glass. Please keep in mind that a dust cover on top of the module is reducing power output.
Power Supply 4.4.4 Maintenance Apart from checking periodically if all contacts are firmly connected and not corroded, no maintenance is necessary. 4.5 Grounding 4.5.1 General To protect the Met Station against lightning strikes, as well as to ensure proper functioning of the system, all components (datalogger, sensors, power supply, housing, mounts, etc.) need to be referenced to a single common earth ground.
Tripod Tripod 5.1 General Sensors, protective enclosure ENC12/14 (containing datalogger and power unit), and solar panel are mounted to a tripod constructed from galvanized steel pipes. This tripod has a height of around 2 m and a base radius of 1.2 m, resulting in an extremely stable construction. Figure 15 presents a cross sectional profile of the tripod with the basic dimensions. ALU Cross Arm 0.44m/3/4” 0.90m/1.1/4” 0.61m 1.50m/3/4” 0.15m 1.00m 1.
Tripod Table 3: Individual Components of Tripod No. Item 1 Lightning rod. Supplied 2 Lightning rod clamp. Supplied 3 Cross arm support: length = 0.44 m; diameter = ¾ inch; galvanized steel and to be cut locally 4 Bell reducer: one side ¾ inch thread, other side 1.1/4 inch thread, supplied but is also available locally. 5 Upper body: length = 0.90 m; diameter = 1.1/4 inch; galvanized steel with threads on bpot sides and to be availed locally. 6 upper tri-linear connection piece. Part of No. 7 supplied.
Tripod Construction of the tripod is a straightforward process. Foundation blocks with a solid embedded anchoring bold should be constructed at each 120 degrees of a circle with diameter of 2.4 meter. Place the tripod feet (no. 9) on these bolds and attach the nuts firmly. Annex 10 presents detailed instructions for constructing the tripod.
Protective Enclosure ENC12/14 Protective Enclosure ENC12/14 6.1 General 6.2 Installation The fiberglass-reinforced polyester enclosure ENC12/14 serves as housing for datalogger and power unit. It is made of non-corrosive UV-stabilized material, with a white color to reflect solar radiation, hence reducing inside temperature and eliminating the need for a separate radiation shield. The ENC12/14 provides protection against water, dust and most environmental pollutants.
Met Station Compound Met Station Compound 7.1 General The datalogger housing, sensors, and solar panel are attached to a tripod tower, which is placed in the center of the fenced Met Station compound. The compound is solely designated to the Meteorological Station. It should not be used for other purposes what so ever. 7.2 Construction The compound should be constructed according to the design presented in Annex 7.
Annexes Annexes Annex 1: Installation and Operation Instructions for PCTour 1. General PCTour is a DOS based software package provided by Campbell Scientific. It concerns a computer based guided tutorial that presents basic concepts of CR10X and software operations. For example, the functions of the I/O channels are discussed, as well as the concepts of Input, Intermediate, and Final Storage. PCTour also briefly discusses PC208 software, including a discussion on EDLOG and SPLIT.
Annexes Annex 2: H6 L6 AG E3 AG G G 5V 5V G G G H1 L1 AG H2 L2 AG H3 L3 AG E1 AG E2 G P1 G P2 CS 500 clear CS 500 black CS 500 brown CS 500 green LI 200 red LI 200 black TE 525 white 034A green 034A white 034A blue 034A clear 034A red 034A black TE 525 black GCP/INT/752/ITA WIRING DIAGRAM (for Campbell Scientific CR10X) for Met Stations established by GCP/RAF/304/JPN and GCP/INT/752/ITA based on METSTAT Datalogger Program 1998/2001, created by Bart Hilhorst/Shauka
Annexes Annex 3.1: METSTAT Structure Diagram Structure Diagram for METSTAT, a Datalogger Program for the Meteorological Stations established by GCP/RAF/304/ JPN and GCP/INT/752/ITA Projects Using Campbell Scientific CR10X Storage and Control Modules. Interval = 1440 minutes (1day) Interval = 60 minutes (1 hour) Interval = 300 seconds (5 minutes) Switch on CS500 Delay 0.
Annexes Structure Diagram (continuation1) inp 20 inp 11 inp 21 inp 12 inp 13 inp 14 inp 15 AUX_OHS = OH_SOLAR OH_SOLAR = AUX_OHS + FM_SOLAR AUX_ODS = OD_SOLAR OD_SOLAR = AUX_ODS + FM_SOLAR OH_AIRT = AIR_TEMP OH_VPD = VPD OH_VP = VP “auxiliary step” “cum. one hour solar rad.” “auxiliary step” “cum. one day solar rad.” “one hour air temp” “one hour VPD” “one hour VP” “for creating hourly/daily values” IF WIND_SPD =< 0.
Annexes Structure Diagram (continuation 2) OUTPUT inp 22 inp 23 CREATE SIGNA TURE “SIGN1440” MEASURE BATT_VOLT “battery voltage” SET ARRAY_ID = 100 OUTPUT ARRAY_ID STN -ID YEAR DAY AVG(AIR_TEMP) AVG(VP) AVG(VPD) MAX (AIR_TEMP) MIN (AIR_TEMP) SUM (RAIN) SAMPLE(OD_SOLAR) “cum. one day solar rad.
Annexes Annex 3.2: METSTAT Datalogger Program METSTAT is a data logger program for the CR10X Control and Storage Module, intended for the Meteorological Stations established by the Lake Victoria Water Resources and Nile Basin Water Resources Projects. This program is based on the Structure Diagram presented in Annex 3.1. The program is created in EDLOG and stored in the files “METSTAT.CSI” and “METSTAT.DLD” respectively. The latter concerns the compiled version.
Annexes 4: Do (P86) 1: 41 Set Port 1 High ;CONTROL PORT1 IS CONNECTED WITH A JUMPER TO SW12CTRL ;(SWITCHED 12 VOLT CONTROL) 5: Excitation with Delay (P22) 1: 3 Ex Channel 2: 0 Delay W/Ex (units = 0.01 sec) 3: 10 Delay After Ex (units = 0.01 sec) 4: 0 mV Excitation ;DELAY OF 0.1 SEC TO ALLOW CS500 TO WARM UP AND STABILIZE ;INSTRUCTION (P22) ONLY SERVES FOR DELAYING THE PROGRAM ;NO ACTUAL EXITATION IS NEEDED.
Annexes ;RADIATION AT THE EQUATOR IS AROUND 1000 W/M2. HENCE, 7.5 mV, COVERING 1500 W ;SHOULD BE SUFFICIENT. CHECK THIS DURING OPERATION. ;SOLAR RADIATION MEASURED IN J/S,M2. 10: Pulse (P3) 1: 1 Reps 2: 1 Pulse Input Channel 3: 22 Switch Closure, Output Hz 4: 4 Loc [ WIND_SPD ] 5: 0.799 Mult 6: 0.2811 Offset ;WIND SPEED FROM “MET ONE 034A-L WINDSET” SENSOR, CONNECTED TO PULSE ;CHANNEL 1, MULTIPLYER AND OFFSET GIVEN BY SHORTCUT DIFFER FROM THOSE ;IN THE MANUAL; VALUES FROM THE MANUAL ARE APPLIED.
Annexes 4: 30 Then Do 14: Z=F (P30) 1: 100 F 2: 00 Exponent of 10 3: 2 Z Loc [ RH ] 15: End (P95) ;IF RH>100, SET RH=100 16: Saturation Vapor Pressure (P56) 1: 1 Temperature Loc [ AIR_TEMP ] 2: 7 Loc [ SVP ] ;CALCULATING SATURATED VAPOR PRESSURE AS FUNCTION OF AIR TEMPERATURE ;IN KILO PASCAL [KPA] 17: Z=X*F (P37) 1: 2 X Loc [ RH 2: 0.
Annexes 3: 3 Z Loc [ SOLAR_RAD ] 23: End (P95) ;SOLAR RADIATION IS SET TO NUL IN CASE OF NEGATIVE VALUES, WHICH MAY OCCUR ;AT NIGHT 24: Z=X*F (P37) 1: 3 X Loc [ SOLAR_RAD ] 2: 0.
Annexes 2: 17 Z Loc [ OH_AIRT ] 31: Z=X (P31) 1: 8 X Loc [ VP ] 2: 18 Z Loc [ OH_VP ] 32: Z=X (P31) 1: 10 X Loc [ VPD ] 2: 19 Z Loc [ OH_VPD ] ;INSTRUCTION 26, 27 AND 28 ARE FOR CREATING HOURLY VALUES OF ;AIR TEMPERATURE, VP AND VPD 33: If (X<=>F) (P89) 1: 4 X Loc [ WIND_SPD ] 2: 1 = 3: 0.2811 F 4: 30 Then Do 34: Z=F (P30) 1: 0.
Annexes 4: 30 Then Do 39: If time is (P92) 1: 0 Minutes (Seconds --) into a 2: 5 Interval (same units as above) 3: 10 Set Output Flag High 40: Set Active Storage Area (P80) 1: 1 Final Storage Area 1 2: 300 Array ID 41: Sample (P70) 1: 1 Reps 2: 24 Loc [ LOGGER_ID ] 42: Real Time (P77) 1: 1220 Year,Day,Hour/Minute (midnight = 2400) 43: Sample (P70) 1: 1 Reps 2: 21 Loc [ FM_RAIN ] 44: End (P95) ;========= END OF RAINFALL SERIES OUTPUT INSTRUCTIONS ========== ;======= TO ACTIVATE AUTOMATIC DATA TRANSFER TO
Annexes 1: 1 2: 24 Reps Loc [ LOGGER_ID ] 49: Real Time (P77) 1: 1220 Year,Day,Hour/Minute (midnight = 2400) 50: Average (P71) 1: 1 Reps 2: 17 Loc [ OH_AIRT ] 51: Average (P71) 1: 1 Reps 2: 18 Loc [ OH_VP 52: Average (P71) 1: 1 Reps 2: 19 Loc [ OH_VPD ] ] 53: Sample (P70) 1: 1 Reps 2: 12 Loc [ OH_SOLAR ] ;”OH_SOLAR” IN [MJ/M2] ;OUTPUT EVERY SIXTY MINUTES: ;AVERAGE ONE-HOUR-AIR-TEMP, AVERAGE ONE-HOUR-VAPOR-PRESSURE-DEFICIT ;CUMMULATIVE ONE-HOUR-SOLAR-RADIATION, AVERAGE ONE-HOUR-VAPOR-PRESSURE 54: Wind
Annexes ;============= CONTINUE WITH DAILY OUTPUT =================== 58: If time is (P92) 1: 0 Minutes (Seconds --) into a 2: 1440 Interval (same units as above) 3: 10 Set Output Flag High 59: Set Active Storage Area (P80) 1: 1 Final Storage Area 1 2: 100 Array ID 60: Signature (P19) 1: 22 Loc [ SIGN1440 ] ;CREATE DAILY PROGRAM SIGNATURE TO MONITOR ADEQUATE PROGRAM PERFORMANCE 61: Sample (P70) 1: 1 Reps 2: 24 Loc [ LOGGER_ID ] 62: Real Time (P77) 1: 1200 Year,Day (midnight = 2400) 63: Average (P71) 1: 1
Annexes ;”OD_SOLAR” IN [MJ/M2] 70: Wind Vector (P69) 1: 1 Reps 2: 0000 Samples per Sub-Interval 3: 00 S, é1, & å(é1) Polar 4: 4 Wind Speed/East Loc [ WIND_SPD ] 5: 5 Wind Direction/North Loc [ WIND_DIR ] ;THE ABOVE OUTPUTS: ALL REQUIRED DAILY VALUES 71: Sample (P70) 1: 1 Reps 2: 22 Loc [ SIGN1440 ] ;OUTPUTS SIGNATURE 72: Batt Voltage (P10) 1: 23 Loc [ BATT_VOLT ] 73: Sample (P70) 1: 1 Reps 2: 23 Loc [ BATT_VOLT ] ;SAMPLES AND OUTPUTS BATTERY VOLTAGE 74: If time is (P92) 1: 0 Minutes (Seconds --) into a 2:
Annexes Annex 4: Input Storage Locations Used by METSTAT See METSTAT Structure Diagram presented in Annex 3.1 for the use of the various variables. Use “*6” Mode and press “A” equivalent to “enter” to proceed from one variable to another.
Annexes Annex 5: Guidelines for Assessing Station Performance Using Daily Signature and Battery Voltage Recordings 5-A General METSTAT includes routines to monitor two essential station performance indicators, namely (1) battery voltage and (2) the signature of the active datalogger program. The Open Circuit Voltage (OCV) of the battery in use is measured automatically on a daily basis.
Annexes Double click the REPORT icon to start the REPORT module (a.k.a. SPLIT) used to extract station performance information from the data file. The SPLIT Version 1.7 window appears on the screen, as shown below. This window is used to select the appropriate data file, containing all Met Station data values for the recording period, and a pre-programmed “parameter” file called METPERF.PAR, which function as to automatically split station performance information from the rest of the station output.
Annexes Next, the appropriate data file, containing the complete Met Station recordings, should be selected. Click “Browse” and navigate to the appropriate “DAT” file. Select and click OK.
Annexes After selecting the right input file, execute SPLIT by clicking the GO instruction on the RUN menu, as shown below: 64 Installation, Operation and Maintainance of Automatic Meteorological Stations
Annexes After running the METPERF.
Annexes Column 1 contains the datalogger-ID; column 2 and 3 contain year, month and day respectively; column 4 gives the datalogger program signature, and column 5 presents the daily battery voltage recordings. 5-C Interpreting Station Performance Information Interpreting station performance information is a straightforward process. There are basically the following options: 1. 2. 3. 4. 66 The values of daily battery voltage recordings are fairly constant, as in the above example.
Annexes Annex 6: Batterry Log Book Specimen Battery Specifications Number: Main Office: Date of Purchase: Make: Type: Capacity: Battery Log Date Initial Voltage [V] Initial SoC [%] Activity Final Voltage [V] Final SoC [%] Remarks Manual 67
Annexes Annex 7: Design of Met Station Compound 6.0m B B A A Angle Iron to support corner post A A 1200 1200 6.0m 1200 Weather recorder A A Door frame angel iron 2”x2”x1/4”x8` Long B Door shutter A A B 2.0m 0.5m 0.8m A= Intermediate Post (line post) B= Corner Post 0.5m 2.
Annexes 0.23m Galvanized Pipe Post 0.45m 3x 3/16” holes 0.45m Angle Iron 2”x2”x1/4”x5’ for supporting corner post 0.45m 0.23m 0.6m 0.75m 0.15m 0.5m A – Line Post 0.
Annexes Annex 8: Guidelines for Loading METSTAT Datalogger Program into Program Location 8 of the SM4M/SM192 Storage Module 8-A General It is advised to permanently store METSTAT datalogger program in program location 8 of the SM4M or SM192 Storage Module. In this case, reloading METSTAT into the CR10X is automatically accomplished by connecting the SM4M/ SM192 to the logger, and toggling the switch on the PS12-LA power supply OFF/ON.
Annexes Double click the Stg Module icon. In the window that appears, first click the “SM4M/SM16M” tab at the right most corner of the screen, and subsequently the “Setup” tab at the bottom-left. The following window shows up. In this setup window, select the appropriate COM port. A default Baud Rate of 19200 is OK or otherwise change it to lower baud rate if necessary. Click the Connect button to connect the Storage Module to the PC. If communication is successfully established, the below screen appears.
Annexes Clicking the “Programs” tab brings up the Program Control Option screen, which shows that program location 8 is presently free.
Annexes To load METSTAT in program location 8, check the box in front of “Prog 8” and click “Store”. A navigation screen appears as presented below. Navigate to the location, which contains the METSTAT.DLD file. Select this file and click Open. METSTAT is now loaded into program location 8 of the SM4M. Once this process is successfully completed, the status of “Prog 8” has changed to “used”, as shown in the below window.
Annexes Disconnect the SM4M by clicking the Disconnect button. METSTAT has successfully been stored in program location 8 of the SM4M Storage Module. Procedure is the same for storing the program in location 8 of the SM4M and SM192.
