Comptus A70-SDL Series, Инструкция по эксплуатации

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2
Figure 1
Recorder Trace with Predominate
North Wind
540
o
Scale 360
o
Scale
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N E S W N E S N E S W N
Figure 2
Recorder Trace with Predominate
South Wind
540
o
Scale 360
o
Scale
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N E S W N E S N E S W N
INTRODUCTION
The Model A70-SDL system provides electrical
signals proportional to wind speed and direction.
It accepts signals from anemometers with AC
generators.
The translator will operate with most potentiometric
type wind vanes. The Translator may be in one of
several packages. It may be track mounted for
installation in an existing enclosure. It may be
supplied in a steel NEMA 12 JIC box for inside
deployment or in a steel NEMA 4 box when a
weather proof box is required.
The transmitter converts the information from the
sensors to 4-20 ma signals proportional to wind
speed and direction. Two wind direction ranges, 0 -
360
o
and 0 - 540
o
are available. The 540
o
range is
recommended if a chart recorder will record wind
direction. This range reduces transitions from zero
to full scale when the wind is from the North,
preventing the entire chart from being “painted.”
The 360
o
range is recommended when wind
direction is electronically recorded. The 360
o
range
provides the best resolution and the least cost. The
540
o
range is best when abrupt transitions from zero
to full scale are undesirable.