METER ATMOS 41 Manuale utente
ATMOS 41
i
TABLE OF CONTENTS
1. Introduction..............................................................................................1
2. Operation ...................................................................................................2
2.1 Installation ................................................................................................2
2.2 Connecting................................................................................................. 3
2.2.1 Connect to METER Logger................................................................4
2.2.2 Connect to Non-METER Logger........................................................5
2.3 Communication .........................................................................................6
3. System.........................................................................................................7
3.1 Specifications............................................................................................7
3.2 Pyranometer ............................................................................................ 12
3.3 Anemometer ............................................................................................ 13
3.4 Vapor Pressure/Relative Humidity Sensor ............................................... 14
3.5 Rain Gauge............................................................................................... 16
3.6 Temperature Sensor................................................................................. 17
3.7 Lightning Sensor...................................................................................... 18
3.8 Barometric Pressure Sensor .................................................................... 19
3.9 Tilt Sensor................................................................................................ 19
3.10 Theory.................................................................................................... 19
3.10.1 Wind Speed and Direction............................................................ 19
3.10.2 Temperature................................................................................. 21
3.11 Limitations............................................................................................. 22
3.11.1 Snow and Ice Accumulation ......................................................... 22
3.11.2 Heavy Rain and Strong Wind ........................................................ 23
3.11.3 Electromagnetic Interference...................................................... 23
18169-04
9.18.2019
ii
3.12 Measurements with METER Loggers...................................................... 23
4. Service....................................................................................................... 25
4.1 Calibration ............................................................................................... 25
4.2 Recalibration Recommendations............................................................. 26
4.3 Cleaning and Maintenance....................................................................... 26
4.4 Update Firmware ..................................................................................... 28
4.5 Troubleshooting....................................................................................... 28
4.6 Customer Support.................................................................................... 30
4.7 Terms and Conditions .............................................................................. 31
References .................................................................................................... 32
Index ................................................................................................................. 33
1
1. INTRODUCTION
Thank you for choosing the ATMOS41 All-in-One Weather Station from METER Group.
The ATMOS41 All-in-One Weather Station is designed for continuous monitoring of
environmental variables, including all standard weather measurements (Section 3).
TheATMOS41 measures the following:
• Solar radiation
• Precipitation
• Air temperature
• Barometric pressure
• Vapor pressure
• Relative humidity
• Wind speed
• Wind direction
• Maximum wind gust
• Lightning strikes
• Lightning distance
• Tilt
All sensors are integrated into a single, small form-factor unit, requiring minimal installation
effort. A robust, no moving parts design that prevents errors because of wear or fouling make
the weather station ideal for long-term, remote installations. ATMOS 41 can be used for a
variety of applications:
• Weather monitoring
• Microenvironment monitoring
• Spatially-distributed environmental monitoring
• Crop weather monitoring
• Fire danger monitoring
• Weather networks
Additional advantages include its low-power design that supports battery-operated data
loggers and the SDI-12 three-wire interface. A tilt sensor warns the user of out-of-level
condition, and no configurations are necessary.
Prior to use, verify all ATMOS 41 system components are included and appear in
goodcondition.
2
OPERATION
2. OPERATION
Please read all instructions before operating the ATMOS41 to ensure it performs to its
full potential.
PRECAUTIONS
METER sensors are built to the highest standards, but misuse, improper protection,
or improper installation may damage the sensor and possibly void the manufacturer’s
warranty. Before integrating ATMOS41 into a system, follow 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 ATMOS41 and start collecting data.
Table 1 Installation
Tools Needed
Wrench 13 mm (1/2 in)
Mounting pole 31.8 to 50.8 mm (0.25 to 2.0 in) diameter
NOTE: Smaller mounts are compatible if washers are added to the V-bolt (not included).
United States standard pipe sizes that are compatible are 1.00-, 1.25-, and 1.50-in. Square
tubing with a width of 1.25 to 2.00 in or T-posts can also work as mounting options.
Preparation
Consider the Surroundings
Ensure that site selection is far from wind obstruction.
Make sure surrounding objects will not shade the solar radiation sensor.
Choose a site far from sources of high electromagnetic interference (EMI),
such as high-voltage power transmission lines. EMI sources adversely affect
ATMOS41 lightning and rainfall measurements.
Conduct System Check
Plug the weather station into the logger (Section 2.2).
Verify all sensors are functional and read within expected ranges.
Adjust Pole Height
Prepare the mounting pole to the appropriate height. Many installations
require the ATMOS41 to be mounted 2 m above ground, but mounting height
can be adjusted based on the specific application.
Mounting
Install on Mounting Pole
Use the V-bolt to mount the unit at the desired height. The V-bolt is compatible
with most meterological stands, poles, tripods, and other mounts.
Mount Toward True North
Orient the Nengraved on the side of the instrument should be oriented to point
true north (not magnetic north). The ATMOS41 must be oriented correctly by
hand for accurate wind direction measurements.
3
ATMOS 41
Table 1 Installation (continued)
Mounting
(continued)
Level the System
Use the bubble level underneath the ATMOS41 or a PROCHECK display to level
the weather station. The angle of the mounting pole may need to be adjusted
or shims added to the ATMOS41–pole interface to achieve level. The ATMOS41
must be within approximately ±2° of dead level (0, 0) in both the X and Y
directions to accurately measure rainfall and solar radiation.
Secure the System
Tighten the V-bolt nuts by hand until hand-tight, and then gently tighten with a
wrench, securing the ATMOS 41 flat and tight against the top of the stand.
CAUTION: Do not overtighten V-bolt.
Secure and Protect Cables
NOTE: Improperly protected cables can lead to severed cables or disconnected sensors.
Cabling issues can be caused by many factors such as rodent damage, driving over sensor
cables, tripping over cables, not leaving enough cable slack during installation, or poor
sensor wiring connections.
Install cables in conduit or plastic cladding when near the ground to avoid
rodent damage.
Gather and secure cables between the ATMOS 41 and the data logger to the
mounting mast in one or more places.
Connect to Data Logger
Plug the sensor into a data logger.
Use the data logger to make sure the sensor is reading properly.
Verify these readings are within expected ranges.
For more instructions on connecting to data loggers, refer to Section 2.2.
NOTE: ATMOS41 will not work with legacy Decagon data loggers (Em50 Series and Em5B) because the ATMOS41
outputs contain too many parameters.
2.2 CONNECTING
The ATMOS41 works seamlessly with METER data loggers. This system will not work
with legacy data loggers (Decagon Em5, Em5B, Em50, Em50R, and Em50G) because the
ATMOS41 has too many output parameters (previously limited to three). The ATMOS 41 can
also be used with other data loggers, such as those from Campbell Scientific, Inc. For
extensive directions on how to integrate the sensor into third-party loggers, refer to the
ATMOS41 Integrator Guide (metergroup.com/atmos41-support).
ATMOS41 sensors require an excitation voltage in the range of 3.6 to 15.0 VDC and operates
at a 2.8- to 5.5-VDC level for data communication. The ATMOS41 can be integrated using
SDI-12 protocol. See the ATMOS41 Integrator Guide for details on interfacing with data
acquisition systems.
4
OPERATION
ATMOS41 sensors come with a 3.5-mm stereo plug connector (Figure1) to facilitate easy
connection with METER loggers. ATMOS41 sensors may be ordered with stripped and tinned
wires to facilitate connecting to some third-party loggers (Section 2.2.2).
Ground
Digital communication
Power
Figure1 3.5-mm stereo plug connector wiring
The ATMOS41 comes standard with a 5-m cable. It may be purchased with custom cable
lengths for an additional fee (on a per-meter basis). In some instances, the cable can be
extended beyond 75 m by the user, but this is discouraged for a variety of reasons. Please
contact Customer Support for more details before extending or splicing cables.
2.2.1 CONNECT TO METER LOGGER
The ATMOS41 works most efficiently with ZENTRA series data loggers. Check the
METER downloads webpage (metergroup.com/downloads) for the most recent data
logger firmware. Logger configuration may be done using either ZENTRA Utility (desktop
and mobile application) or ZENTRA Cloud (web-based application for cell-enabled data
loggers).
NOTE: This system will not work with legacy data loggers (Decagon Em5, Em5B, Em50, Em50R, and Em50G).
1. Plug the stereo plug connector into one of the sensor ports on the logger.
2. Use the appropriate software application to configure the chosen logger port for the
ATMOS 41. METER data loggers will automatically recognize ATMOS 41 sensors.
3. Set the measurement interval.
METER data loggers measure the ATMOS 41 every minute and return the average of the
1-min data across the chosen measurement interval.
NOTE: The ATMOS41 draws more current than most other METER sensors because it makes frequent wind
speed and precipitation measurements. As a result, plugging multiple ATMOS41 stations into a single ZENTRA or
EM60 data logger may have significant impact on battery life. At times or in regions with plentiful sunshine, the
solar panel should provide ample charge and this should not be an issue. During the winter or periods of extended
heavy clouds, the solar panel may not provide enough charging current to keep the system running with multiple
ATMOS41 units. METER recommends using only one ATMOS41 per ZENTRA or EM60 data logger.
ATMOS 41 data can be downloaded from METER data loggers using either ZENTRA Utility or
ZENTRA Cloud. Refer to the logger user manual for more information about these programs.
5
ATMOS 41
2.2.2 CONNECT TO NONMETER LOGGER
The ATMOS41 can be purchased for use with non-METER (third party) data loggers. Refer
to the third-party logger manual for details on logger communications, power supply,
and ground ports. The ATMOS41 Integrator Guide also provides detailed instructions on
connecting sensors to non-METER loggers.
ATMOS 41 sensors can be ordered with stripped and tinned (pigtail) wires for use with screw
terminals. Refer to the third-party logger manual for details on wiring.
Connect the ATMOS41 wires to the data logger as illustrated in Figure2 and Figure3, with
the power supply wire (brown) connected to the excitation, the digital out wire (orange) to a
digital input, and the bare ground wire to ground.
Ground (bare)
Digital
communication (orange)
Power (brown)
Figure2 Pigtail wiring
NOTE: Some early ATMOS41 units may have the older Decagon wiring scheme where the power supply is white,the
digital out is red, and the bare wire is ground.
Excitation Digital
in
Data Logger
Ground
Digital
communication
(orange)
Ground
(bare)
Power
(brown)
Figure3 Wiring diagram
NOTE: The acceptable range of excitation voltages is from 3.6 to 15.0 VDC.To read the ATMOS41 with Campbell
Scientific data loggers,power the sensors off a 12-V port.
If the ATMOS41 cable has a standard stereo plug connector and needs to be connected
to a non-METER data logger, use one of the following two options.
Option 1
1. Clip off the stereo plug connector on the sensor cable.
2. Strip and tin the wires.
3. Wire it directly into the data logger.
6
OPERATION
This option has the advantage of creating a direct connection and minimizes the chance of
the sensor becoming unplugged. However, it then cannot be easily used in the future with a
METER readout unit or data logger.
Option 2
Obtain an adapter cable from METER.
The adapter cable has a connector for the stereo plug connector on one end and three wires
(or pigtail adapter) for connection to a data logger on the other end. The stripped and tinned
adapter cable wires have the same termination as in Figure3: the brown wire is excitation,
the orange is output, and the bare wire is ground.
NOTE: Secure the stereo plug connector to the pigtail adapter connections using adhesive-lined heat shrink to ensure
the sensor does not become disconnected during use.
2.3 COMMUNICATION
The ATMOS 41 communicates using SDI-12 communication protocol. To obtain detailed
instructions, refer to the ATMOS 41 Integrator Guide.
The SDI-12 protocol requires that all sensors have a unique address. ATMOS 41 sensor
factory default is an SDI-12 address of 0. To add more than one SDI-12 sensor to a bus, the
sensor address must be changed as described in these steps.
1. Using a PROCHECK connected to the sensor, press the MENU button to bring up the
Configuration tab.
NOTE: If the PROCHECK does not have this option, please upgrade its firmware to the latest version from the
METER Legacy Handheld Devices webpage.
2. Scroll down to SDI-12 Address. Press ENTER.
3. Press the UP or DOWN arrows until the desired address is highlighted.
Address options include 0...9, A…Z, and a…z.
4. Press ENTER.
Detailed information can also be found in the application note Setting SDI-12 addresses on
METER digital sensors using Campbell Scientific data loggers and LoggerNet (metergroup.
com/environment/articles/setting-addresses-using-campbell-scientific-data-loggers/).
When using the sensor as part of an SDI-12 bus, excite the sensors continuously to avoid
issues with initial sensor startup interfering with the SDI-12 communications.
Altri manuali per ATMOS 41
5
Indice
Altri manuali METER Stazione meteorologica
Manuali Stazione meteorologica popolari di altre marche
National Geographic
National Geographic VA Colour RC Manuale utente
Renkforce
Renkforce 1208067 Manuale utente
Levenhuk
Levenhuk Discovery Report WA40 Manuale utente
Instant Transmission
Instant Transmission MA 10410 Manuale utente
Lutron Electronics
Lutron Electronics PHB-318 Manuale utente
WAREMA
WAREMA EWFS Weather station eco Manuale utente