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Agilaire 8872 Manual
Chapter 2 Configuration
Meteorological Channel Types
The
Vector Wind Speed channel
computes average wind speed as a vectored average.
A corresponding Vector Wind Direction Channel must also be configured to support the Vector
Wind Speed Channel. Input types can be analog inputs, or GSI (RS-232) based sensors, with
a specific channel type for each approach. For the analog input type, the “Misc” tab is similar to
the Analog Input Channel, while for the GSI version, the “Misc” tab looks like the GSI channel.
The main difference is the manner of calculation, handling zero crossover, 0-360 and 0-540
degree instruments, etc.
The
Rolling channel
calculates an extended rolling average from another channel’s average,
such as hourly averages rolling on the minute. The rolling average is updated when the base
average is updated. For example, if the base average interval is one minute and the rolling
average interval is one hour, the rolling average channel will store a new data point every
minute; each data point will be an average of the previous 60 one-minute averages.
On the Misc. tab:
Input Channel is the input channel number used for the rolling channel average.
Input Interval is the data used to input into the rolling channel averages, and is the
frequency at which the rolling average channel will create data.
Duration is the length of the ‘buffer’ of input intervals used to calculate each average.
For vector wind channels, an
additional input is given for the
companion channel (e.g., the
Vector Wind Direction Channel
for VWSP, and the Vector Wind
Speed Channel for VWDR).
The selection is the channel
number for 8816s and 8832s,
while 8872s use a pick list from
already configured channels.
