METER ATMOS 41W, Manual

Page 1: ...ATMOS 41W...

Page 2: ...3 1 Specifications 21 3 2 Components 25 3 2 1 Pyranometer Solar Radiation 26 3 2 2 Rain Funnel Precipitation 28 3 2 3 Electrical Conductivity EC 34 3 2 4 Vapor Pressure and Relative Humidity 34 3 2 5...

Page 3: ...52 4 ZENTRA Software 53 4 1 ZENTRA Utility Mobile 53 4 2 ZENTRA Cloud 53 5 Service 55 5 1 Uninstalling 55 5 2 Calibration 55 5 3 Recalibration Recommendations 57 5 4 Cleaning and Maintenance 57 5 5 U...

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Page 5: ...average Wind speed Wind direction Maximum wind gust Tilt All sensors and wireless cloud communications are integrated into a single small form factor unit requiring minimal installation effort A robu...

Page 6: ...s 13 mm 1 2 in wrench 8 mm 5 16 in wrench ZENTRA Cloud Device Subscription information orange card 6 AA batteries installed NiMH rechargeable When evaluating where to install the ATMOS 41W METER recom...

Page 7: ...w the recommended installation instructions and have the proper protections in place to safeguard sensors from damage 2 1 INSTALLATION Follow the steps listed in Table 1 to set up the ATMOS 41 and sta...

Page 8: ...vice Serial Number A4100000 Device Password password Server zentracloud com Use this unique Device Serial Number and Device Password to subscribe to this device on zentracloud com Keep this informatio...

Page 9: ...t blinking indicating power is available NOTE The status lights will settle to a short single green blink every 5 s signaling the data acquisition component is ready for use Test Bluetooth Module With...

Page 10: ...ew the cellular data upload setting and the sensor measurement interval Make changes if desired and save changes Section 2 2 2 Factory default configuration is 15 min logging interval and 1 h upload V...

Page 11: ...Cloud Select the Sign Up button Enter a valid email address and user information Accept the Terms and Conditions Verify User Account Select the Sign Up botton to generate a confirmation email Click on...

Page 12: ...elect Create Organization Enter Organization name Enter Role Select Accept Add Device Click on Add New button Select the desired Device from the menu Enter the Device Serial Number and the Device Pass...

Page 13: ...e mount location has minimal slope and low vegetation height so the pyranometer found on top of the rain funnel will not be covered by shade Identify Mounting Location Interferences Consider a site fa...

Page 14: ...If the cellular signal is low or the cellular test fails move to an alternative location sometimes moving only a few meters is sufficient If there is significant bird activity at the site consider usi...

Page 15: ...ue north not magnetic north The ATMOS 41W must be oriented correctly by hand for accurate wind direction measurements Mounting pole Mounting shelf North symbol V bolt Mount and Secure Device Tighten t...

Page 16: ...retightening the screw The ATMOS 41W must be within approximately 2 of dead level to accurately measure rainfall and solar radiation Loosen the level screw Slide the ATMOS 41W side to side Bubble leve...

Page 17: ...oid 7 0 or newer Add ZENTRA Cloud user credentials to allow uploading data 2 2 1 BLUETOOTH CONNECTION The ATMOS 41W rain funnel must be removed in order to press the TEST button before establishing a...

Page 18: ...14 Operation Once connected the ZENTRA Utility Mobile screen will show the sensor information and instantaneous sensor readings Figure 3 Figure 3 Information and current sensor readings...

Page 19: ...GURATION The measurement interval and upload increments can be adjusted here 1 On the mobile device open ZENTRA Utility Mobile 2 Select the ATMOS 41W 3 Select Configure on the Actions panel Figure 4 F...

Page 20: ...the name to the field or plot where the ATMOS 41W is installed 5 OPTIONAL In the Configure Device window set the measurement interval to the desired interval Figure 5 The default measurement interval...

Page 21: ...ents for the hour intervals The ATMOS 41W will upload data during the selected intervals 11 Click OK 2 2 3 COMMUNICATION TEST A successful communication test will confirm that the ATMOS 41W can transm...

Page 22: ...sts are required press the Start button show on the right side of Figure 8 If the ATMOS 41W cellular test fails move to a new location and try again Sometimes moving just a few meters will provide a s...

Page 23: ...lly scan the ATMOS 41W every 30 s and refresh the sensor readings ZENTRA Utility Mobile can also take real time sensor measurements on demand using the Refresh function Figure 9 This is a critical too...

Page 24: ...20 Operation Figure 9 Refresh function To force a new scan at any time swipe down on the main screen or hit the Refresh button The sensor measurement area will refresh...

Page 25: ...ar Radiation Range 0 1 750 W m2 Resolution 0 1 W m2 Accuracy 5 of measurement typical Precipitation Range 0 2 000 mm h Resolution 0 017 mm Accuracy 5 of measurement from 0 to 1000 mm h Electrical Cond...

Page 26: ...sor accuracy Humidity Sensor Temperature Range 63 to 80 C Resolution 0 1 C Accuracy 0 2 C Barometric Pressure Range 1 120 kPa Resolution 0 01 kPa Accuracy 0 05 kPa 25 C 0 1 kPa from 10 to 50 C 0 5 kPa...

Page 27: ...lution 0 1 Accuracy 1 GPS Communication Type Integrated 56 channel GPS QZSS receiver Update Daily automatic and on demand manual Accuracy 4 m with good sky view Sensor Measurement Interval 5 min to 12...

Page 28: ...VERIZON AT T and T Mobile in the USA Select global partner carriers Cellular and data hosting service provided by METER Mobile Communication Bluetooth 5 2 supporting Bluetooth low energy protocol PHYS...

Page 29: ...17050 2010 CE Mark 3 2 COMPONENTS The electric components including the data acquisition and transmission hardware are housed in a weather resistant enclosure IP56 rated Figure 12 The integrated data...

Page 30: ...a silicon cell sensor to measure the total incoming direct and diffuse solar radiation A carefully developed cosine correcting head ensures accurate readings regardless of sun angle while the painstak...

Page 31: ...ng the ATMOS 41W at installation Table 1 Bird droppings and other soiling of the domed sensor surface will cause serious errors in pyranometer measurements Check the sensor regularly to make sure it i...

Page 32: ...nfall measurement The drop counter consists of two gold electrodes Figure 14 that measure each drop formed by the flared hole Because the flared hole forms a drop of a known size the ATMOS 41W can cal...

Page 33: ...W Screen Downspout EC basin Drop count electrodes Tipping spoon Rain funnel OK TEST ERROR Status indicators TEST button Flared hole Spring Pyronometer Battery cap Battery cap Figure 14 Rain funnel and...

Page 34: ...fall rates 400 mm hr Extends the off level tolerance for rainfall measurement If the ATMOS 41W is off level by significantly more than 2 degrees drops can miss the gold pins and will not be counted Th...

Page 35: ...ving ATMOS 41W rain funnel 3 2 2 2 DISCONNECT PYRANOMETER AND RAIN FUNNEL Before removing the rain funnel completely carefully disconnect the pyranometer from the ATMOS 41W base by disconnecting the p...

Page 36: ...placing the funnel do the following 1 Reattach the pyranometer connector by mating the two halves of the white connector and seating them firmly together until the tabs lock Figure 17 NOTE The connect...

Page 37: ...33 ATMOS 41W Figure 17 Pyranometer cable connector Gold electrodes Tipping spoon Downspout screen Figure 18 Downspout and screen...

Page 38: ...ment basin will also influence the EC measurement until the residual water and solutes are completely flushed from the basin Additionally microbial activity in the measurement basin can lead to biofou...

Page 39: ...ssure of the air from the ATMOS 41W and es Tair is saturation vapor pressure at the air temperature given by the ATMOS 41W The saturation vapor pressure is calculated using the Magnus Tetens equation...

Page 40: ...om 1 to 120 kPa the sensor is suitable for measurement across a wide range of elevations but keep in mind that the magnitude of sensor output will depend chiefly on the installation altitude with subt...

Page 41: ...easured temperature to actual air temperature according to Equation 3 Equation 3 Tcorr Tuncorr S St cp k u d where s the absorptivity of the surface to solar radiation St the total solar radiation mea...

Page 42: ...or in a radiation shield typical measurement approach showed an accuracy of 0 66 C also based on a two standard deviation estimate Thus the temperature correction of the ATMOS 41W appears to give a be...

Page 43: ...t is rejected It is not reported as the maximum gust or included in the data that are averaged over the output interval For normal ATMOS 41W use cases this is an effective method for eliminating inacc...

Page 44: ...plified as shown in Equation 9 Equation 9 This is the basic equation for the anemometer Delta n is proportional to the phase difference between the forward and reverse sound pulses The sound comes fro...

Page 45: ...rithm may result in an error code being output NOTE Cup anemometers average over a much longer interval than 42 ms so the gusts measured with a sonic anemometer will have a larger peak to mean ratio t...

Page 46: ...of the panels Figure 23 reducing solar exposure Solar panel Solar panel Figure 23 Solar panels 3 2 10 GPS RECEIVER The ATMOS 41W has a built in GPS receiver that provides the latitude longitude and al...

Page 47: ...ENSOR MEASUREMENT INTERVAL The user defined sensor measurement interval controls how often the ATMOS 41W records sensor data to internal nonvolatile data storage The interval applies to all inputs on...

Page 48: ...20m instantaneous solar radiation measurements Wind speed 3 s Wind run is calculated from average of 20m saved values of both horizontal wind vectors Wind direction 3 s Weighted direction calculated f...

Page 49: ...be lower than the energy needed to operate the instrument The batteries will buffer the energy needs of the instrument for several months and will return to full capacity as the incoming energy excee...

Page 50: ...attery cap 3 Remove the two screws with a Phillips screwdriver 4 Life off the cap Figure 24 The battery pack will most likely come up with the cap NOTE Be careful not to damage the battery pack wire w...

Page 51: ...y pack w 6 batteries Figure 25 Battery pack removed from cap 6 Replace batteries NOTE Make sure replaced battery polarity and battery pack orientation are correct The wire connecting the battery pack...

Page 52: ...lace the battery cap over the battery pack The cap fits very tight around the battery pack It might need to be angled somewhat to get it to cover the pack NOTE Be careful to not pinch the cable wire w...

Page 53: ...ghts stay on during the reboot This reboot will not erase data or reset settings 2 Perform basic functionality testing on internal systems and evaluate the amount of charge in the battery Table 4 Tabl...

Page 54: ...ure 29 are located near the TEST button and indicate the status of the ATMOS 41W There are several possible status states shown in Table 5 Table 5 Status Lights Status Lights Actions Indication Green...

Page 55: ...to the instrument Upload session frequency and timing can be changed in ZENTRA Utility mobile Section 2 2 2 or ZENTRA Cloud The default setting is for the ATMOS 41W to upload data once per hour at a r...

Page 56: ...meter ly 41w freezing snow for more information on ATMOS 41W performance in high latitude winter 3 3 2 HEAVY RAIN AND STRONG WIND During strong storm events water can splash off of the convex bottom...

Page 57: ...can connect to ATMOS 41W via Bluetooth to do the following Configure operation parameters Test ATMOS 41W cellular communications Troubleshoot real time sensor measurements scan sensors ZENTRA Utility...

Page 58: ...tion reference under high intensity discharge metal halide lamps The transfer standard pyranometers are calibrated through side by side comparison to the mean of at least two ISO classified reference...

Page 59: ...curate to 0 1 C by the original manufacturer All sensors are verified against a NIST traceable standard thermometer to be within 0 2 C at the time of manufacture Vapor Pressure and RH ATMOS 41W vapor...

Page 60: ...appable replacement pyranometers are available from METER Contact Customer Support to purchase a new funnel and consult Instructions for Swapping ATMOS 41W Funnel meter ly 41W funnel replace for instr...

Page 61: ...ers 2 Check the following areas to make sure they are clear of miscellaneous environmental animal specifically bird droppings and insect debris or spider webs a Ultrasonic transducer openings Figure 3...

Page 62: ...ase plate 3 Clean the ATMOS 41W body a Scrub with light to medium pressure using a warm damp cloth b Clean around posts and between crevices using a dry brush c Check the downspout Figure 33 for debri...

Page 63: ...TMOS 41W Downspout Figure 33 Downspout d Observe the Teflon screen Figure 34 If the screen is dirty METER recommends replacing it with a new screen Contact Customer Support for a replacement Teflon sc...

Page 64: ...n basin and EC sensor a Remove the rain funnel Section 3 2 2 1 b Detach the rain funnel Section 3 2 2 2 c Locate the precipitation basin and EC Sensor Figure 35 NOTE Do not touch the screws without gl...

Page 65: ...roughly with tap of deionized water g Reattach the rain funnel Section 3 2 2 3 Contact Customer Support for a replacement Teflon screen CAUTION DO NOT immerse the sensor in water Water may corrode and...

Page 66: ...ty batteries advertising higher charge capacity New NiMH batteries may also be purchased from METER Contact Customer Support to discuss concerns or recommendations Alkaline batteries should be replace...

Page 67: ...at the convex base plate Figure 22 is not dirty Clean by flushing with water and dry with a dry cloth Section 5 4 Be sure the ATMOS 41W is level Not reading any precipitation or not measuring precipit...

Page 68: ...S 41W has good batteries Press the TEST button to reset it Connect to a second Bluetooth device If the connection works the problem is likely with the first device ZENTRA Utility Mobile states there i...

Page 69: ...rs function in ZENTRA Utility Mobile to confirm there are cellular carriers operating in the area If the problem persists contact Customer Support Can data be removed manually and or physically from t...

Page 70: ...mber Description of the problem NOTE For products purchased through a distributor please contact the distributor directly for assistance 5 8 TERMS AND CONDITIONS By using METER instruments and documen...

Page 71: ...QN4NNN XPYLISAU201 or XPYLISAU200 Changes or modifications to the ZL6 series loggers or antenna not expressly approved by METER Group Inc could void FCC compliance and thus the user s authority to ope...

Page 72: ...articuliers qui fonctionnent dans des conditions d exposition des appareils mobiles les antennes se situent plus de 20 centim tres du corps d une personne Changes or modifications to the ZL6 series lo...

Page 73: ...chnical Requirements certified type number 201 160496 ZL6 with TELEC approved 3G UMTS cellular module Technical Conditions certified type number AD120274003 Technical Requirements certified type numbe...

Page 74: ...nsive sonic anemometer for eddy correlation J Appl Meteor 18 1072 1077 Buck AL 1981 New equations for computing vapor pressure and enhancement factor J Appl Meteor 20 1527 1432 Robinson RA Stokes RH 1...

Page 75: ...Court Pullman WA 99163 T 1 509 332 2756 F 1 509 332 5158 E info metergroup com W metergroup com METER Group AG Mettlacher Stra e 8 81379 M nchen T 49 89 1266520 F 49 89 12665220 E info europe metergr...

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