 Your current measuring system is assumed to be shown above the chain line
in the figure below.
The meters accept 4 - 20mA DC signal to show wind speed for respective wind
direction. To unify these signals to indicate on a meter, use our Math Function
Module (model: JF). The system configuration is shown under the chain line
in the Figure below.
Connect 4 - 20mA DC signals from each direction to JF input. Specify addition/subtraction
for JF equation, gain/bias parameters, and the output will be provided as
4 - 20mA DC signal. The equation is as follows:
X0 = K0{K1(X1+A1)
+K2(X2+A2)}+A0
(X0: output, X1, X2:
input, K0, K1, K2:
gain, A1, A2, A0:
bias) |
In this case, specify K0=1, K1=-0.5,
K2=+0.5, A0=50%, A1=0%
and A2=0%, and the signal will represent 1000 rpm
north-east with 20mA output and 1000 rpm north-west with 4mA output, with
12mA DC as borderline. |
I measure wind speed with an anemometer with north as center. Currently
4 - 20mA DC signal corresponding to wind speed 0 - 1000 rpm for north to
east direction is indicated on a meter and another 4 - 20mA DC signal corresponding
to 0 - 1000 rpm for north to west direction on another meter. I would like
to indicate these two signals on a single meter. 
