Davis WeatherLink USB 672576 Manuale Utente
Codici prodotto
672576
7
Streaming Data Output Parameters: . . . . . . . . . . . . . . . . Station ID #, the vector mean wind speed, (5 minutes average in m/
sec), mean wind direction (5 minutes average in degrees true),
standard deviation of the wind direction ("sigma-theta") (degrees),
mean air temperature, (5 minutes average in °C), instantaneous wind
speed (m/sec), instantaneous wind direction (in degrees true),
instantaneous air temperature (°C), instantaneous console or Envoy
battery voltage as required by ALOHA
standard deviation of the wind direction ("sigma-theta") (degrees),
mean air temperature, (5 minutes average in °C), instantaneous wind
speed (m/sec), instantaneous wind direction (in degrees true),
instantaneous air temperature (°C), instantaneous console or Envoy
battery voltage as required by ALOHA
®
.
W e a t h e r L i n k f o r I r r i g a t i o n C o n t r o l w i t h C o n n e c t o r B l o c k ( # 6 5 6 0 )
The connector block is designed for use with most common irrigation systems, including Rain Bird, Rain Master,
and Toro. For the industrial controllers used in agriculture and turf management, it provides electronic pulses for
wind, rain, and evapotranspiration (ET, requires a solar radiation sensor). All users can use the alarm settings in the
Vantage Pro or Pro2 console or Weather Envoy to inhibit the irrigation cycle based on weather conditions. The device
will inhibit the irrigation cycle if ANY of the alarms are active.
and Toro. For the industrial controllers used in agriculture and turf management, it provides electronic pulses for
wind, rain, and evapotranspiration (ET, requires a solar radiation sensor). All users can use the alarm settings in the
Vantage Pro or Pro2 console or Weather Envoy to inhibit the irrigation cycle based on weather conditions. The device
will inhibit the irrigation cycle if ANY of the alarms are active.
H a r d w a r e I n s t a l l a t i o n a n d R e q u i r e m e n t s
In addition to the requirements for WeatherLink, the Irrigation capability has the following additional hardware
requirements.
requirements.
• Computer running 98, 98SE, ME, 2000, XP, or Vista with Microsoft .NET 2.0 framework. Requires at least
3 MB of RAM and 512 KB of hard disk space.
• Industrial Irrigation Controller with inputs for wind, rain, and/or ET; or a Residential Controller with a
Common or a Rain Sensor connection.
• Solar Radiation Sensor, P/N 6450 to use evapotranspiration (ET) to control the irrigation cycle. In
addition to the ET pulse output, the Rain - ET algorithm uses this information. More information is
provided below.
• Relays: You may need to obtain your own relays in order to switch equipment at voltages higher than
28 volts or power levels above 10 Watts.
Note:
An industrial controller can also be connected to the Alarm Output on the irrigation data logger if you want the irrigation system to also be suspended
due to cold temperatures or other variables you set.
due to cold temperatures or other variables you set.
Note:
A residential controller may be connected in series to both the ET and Alarm outputs on the Irrigation data logger if you want the irrigation system to
also be suspended due to high winds or cold temperatures in addition to the Rain-ET balance.
also be suspended due to high winds or cold temperatures in addition to the Rain-ET balance.
Caution:
The Alarm Output Module is not suitable for any use in which the health or safety of any person or the value or protection
of valuable property is dependent on the operation of the streaming data logger.
of valuable property is dependent on the operation of the streaming data logger.
F u n c t i o n a l S p e c i f i c a t i o n s
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to 140° F (-40° to 60° C)
Output Contact Closures . . . . . . . . . . . . . . . . . . . . . . . . . 4: Wind, Rain, ET & Alarm Contact Specifications, Terminal Block with
Output Contact Closures . . . . . . . . . . . . . . . . . . . . . . . . . 4: Wind, Rain, ET & Alarm Contact Specifications, Terminal Block with
stainless steel cage clamp screw terminals.
Each of the four output contacts is rated as follows:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Photo-coupled MOS FET
Load Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28VAC or 48VDC
Peak Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 60 V, maximum
Load Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 1.8 A, continuous Maximum at 77°F (25°C), derated to 0.7 A at
Load Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28VAC or 48VDC
Peak Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 60 V, maximum
Load Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 1.8 A, continuous Maximum at 77°F (25°C), derated to 0.7 A at
185°F, (85°C)
Peak Load Current. . . . . . . . . . . . . . . . . . . . . . . . . . 6 A for 100 msec., maximum
ON Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.12 Ohms, maximum
OFF Leakage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 uA, maximum
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . 550 mW, maximum
ON Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.12 Ohms, maximum
OFF Leakage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 uA, maximum
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . 550 mW, maximum
Output Contact Closure Functions:
Wind . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 pulse per 1 mph in 2 seconds. Frequency in Hz is half the wind
speed in mph
Rain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 pulse per tip of the rain bucket. Depends upon rain collector type
setting in console (0.01" or 0.2 mm)
ET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 pulse per 0.01" in Industrial mode only; acts as an alarm in
Residential mode (see below) only