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Davis weather stations

Davis weather stations

Davis Vantage Pro and Vantage Vue weather stations

Davis and the market
Davis is a (semi) professional segment weather station. Within this segment, Davis delivers an unbeatable price / quality ratio, which means that within this segment there is hardly any kind of serious competition for Davis.

Davis is the choice for you as a weather enthusiast and the professional who values reliability and accuracy. Davis does not stand still in terms of development. Constant improvements are being made on existing models such as a more accurate VP2 sensor, an improved rain cone, etc.

With the Enviromonitor system, Davis shows that it is also developing innovative new systems. The Enviromonitor system is primarily intended for the business market.

Vantage Pro 2 developments

2000 - Birth Davis Vantage Pro1
2003 - VP1 revision. T / H sensor now separate from ISS board
2005 - Introduction Vantage Pro2 (analogue T / H sensor - 7346.029)
2006 - Jan 1 and beyond: T / H sensor digital
2011 - 1-Aug. Introduction "green dot" data loggers. Dataloggers from before this date do not work with the newer stations.
2013 - From Feb: new model (6410) anemometer, narrow neck. Replace switch with solid state sensor (electronic switch). Magnet now in (replaceable) windspeed cartridge instead of in wind cups.
2014 - Improved rain cone with finger "grips", bird spikes and new dirt filter.
2016 - 1-Jan and beyond (mfg codeASxxx and higher): T / H sensor accuracy 0.3 ° C - 7346.070
2017 - Jan 1 and beyond Aerocone rain cone. Aerodynamically shaped rain cone with dirt filter lock.

Determine the age of your station? Decode first 6 digits of Mfg (bar) code on the back of the console to: YYMMDD.
I.e: Mfg code: AA111012P002> First 6 digits: 111012> years:(20)11; month:10 day:12. Console has been produced 12-10-2011
Models
The basis for the Davis weather stations is the Davis Vantage Pro2. This weather station is available in different (more or less extensive) versions. You can also choose the entry model Davis Vantage Vue.

The Vantage Vue uses the same technology as the Vantage Pro2 series and has the standard weather variables. The Vantage Pro2 and Vantage Vue are fully compatible with each other. A Vantage Vue display can therefore easily receive a Vantage Pro2 outdoor unit and vice versa.

Technique
  • The stations operate at 868MHz (EU) frequency.
  • For transmission of the weather data  "frequency hopping" technique is used. This means that all of the  available bandwidth is used to broadcast weather data so disruptions are kept to a minimum.
  • The outdoor unit (ISS) transmits weather data every 2,5sec. o the recipient.
  • Recipients do not need to be linked manually. You do not have to worry about it. The receiver automatically scans the available stations.
  • The high quality materials used for the outdoor unit are weather and UV resistant.
  • A lot of attention is also paid to the protection of the electronics against the effects of the weather.

Comparison

Comparison Davis stations
VgeVue
Vantage Pro2
Vantage Pro2 +
Station model
6250
VP2Vue
6152C
VueVP2
6152
6153
6162C
6162
6163
Outdoor unit wireless
Extra wireless options possible
*
*
*
Fan ,UV, solar sensor optionally
Incl. 24Hr temp. fan
Incl. UV and solarsensor
* Extra wireless options:
Possibility to connect wireless wind gauge set (6332 + 6410).

Console
Both the Davis Vantage Pro2 and the Vantage Vue feature an extensive console with internal memory for storage of weather data. Every 2.5 seconds weather data is refreshed resulting in practically real time weather data.

You do have a view of the current situation at any time, especially for stormy situations and downpours. This way you are constantly on top of the weather! Furthermore, the console has a graph with last 24 hours data  for all weather variables.

In addition, the highest / lowest values ​​per day, month and year are displayed at the touch of a button. You will also receive notifications about phenomena such as annual meteorites, the transition to the summer, battery status, etc.

The internal display memory remembers all weather variables during the last 25 hours, 25 days, 25 months, and even 25 years of historic data of rain measurements. This data is also retained after a power failure (as well as all settings do).

The historical data is shown in a graph. You can easily view all individual values ​​with corresponding times. The console furthermore accommodates the optional data logger for recording all weather data in detail. On both the Vantage Pro2 and the Vantage Vue display alarms can be set which emit a beep when the specified limit is exceeded.

The console is powered by the supplied power adapter. For backup in the event of a power failure, the console can be equipped with regular alkaline batteries.
ISS (Integrated Sensor Suite)
Robust, corrosion-free and weather-resistant outdoor unit. Built-in spirit level for optimal placement.

Scope
The powerful transmitter of the ISS ensures reliable reception, even in difficult conditions.
The maximum free field range (no obstacles and good weather conditions) is 300m. In practice, this will usually be somewhere between 50-150m.

To cover larger distances, all kinds of options are available. Davis has a solution even outside the reach of power and internet.
Radiation shield
The radiation shield is made up of a number of stacked rings that provide both horizontal and vertical ventilation.

The temperature and humidity sensor is located in the middle of the radiation shield. The radiation shield is passively vented by default. That is, the wind provides the ventilation. In low winds and bright sun and higher temperatures, some irradiation will occur. See below.

With a fan aspirated radiation shield (FARS) the air is mechanically ventilated through the inner radiation shield. The fan has an independent power supply. The Davis models with integrated fan run 24 hours a day. The large solar panel charges the batteries of the fan unit during daytime.

The day time fan option can be installed as an option and ensures air circulation in the radiation shield. The extra solar panel on the lid of the transmitter powers the fan during daytime when you will experience most of the influence of radiation.

Differences with passive and active ventilation.

Radiation-induced error when using:

Passive radiation shield                + 2°C (4°F)
Fan aspirated radiation shield        + 0.3°C (0.6°F)
Reference: RM Young Model 43408 Fan Aspirated Radiation Shield

At 1040W/m2 of sun power - highest position of the sun - wind 1m/s

Anemometer
The anemometer is connected to the base station by means of a 12m cable. So you can mount the wind sensor at a high place while mounting the base unit at 1.5m height above surface (standard height for temperature measurement). The cable can be extended. Also you can use an additional transmitter unit to transmit the wind data.

The current anemometer no longer uses a more susceptible reed switch. The reed switch has been replaced by a solid state switch (electronic component).
Rain gauge
The rain gauge uses a tipping bucket mechanism. Every time the seesaw tilts 0.2mm (European variant) precipitation is recorded. The water is drained via the baseplate. You can calibrate the rain gauge with the screws under the end on both sides of the rocker.

The rain cone can be supplied with (supplied) bird spikes. This prevents birds from landing on the edge and ...

The dirt filter prevents the discharge of precipitation from stalling or slowing down due to leaves etc stacking up in the cone.
Solar sensor
The (optional) solar sensor measures the intensity of the sunlight. The measured value is displayed in Watts/ m2. With this measurement you can, for example, calculate (crop) evaporation. And thus the precipitation balance (precipitation minus evaporation).
 
The Solar sensor can be mounted on the base station with the appropriate bracket set. It is also possible to mount the sensor further away from the station in order to have fewer problems with obstacles that block early morning or late evening sunlight.
UV sensor
The (optional) UV sensor measures the UV radiation of the sunlight. This determines the UV index and the dose ratio (med).
The sensor measures the global radiation intensity of the sun. This consists of the sum of direct radiation and indirect radiation (dispersed throughout the atmosphere). Indirect UV is the most important part of the total irradiatiance.

The UV sensor can be mounted on the base station with the appropriate bracket set. It is also possible to mount the sensor further away from the station in order to exclude obstacles that block the sunlight.