Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 87
o
Mean Direction Unit – This is the wind direction (in degrees) not
weighted for wind speed. Here, the average of 10mph at 0
with 20mph
at 90
is 45
.
Vector Speed:
o
Mean Magnitude Wind – This is the vector average of the wind speed
which takes direction into account. Here, the average of 10mph at 0
for
1 hour and 20mph at 180
for 1 hour is negative 5mph.
Vector Direction:
o
Mean Direction Wind – This is the wind direction (in degrees) weighted
for wind speed. Here, the average of 10mph at 0
with 100mph at 90
is
84
.
The
raw
reading (the reading before slope, offset, and equation processing are
applied) is not available for wind measurements.
7.1.4.20.
Digital
Use the setting
Digital Type
to tell X-Link what kind of sensor is connected.
7.1.4.21.
Digital Type
X-Link supports the following digital types:
Level 1&2 (terminal 7&8)
Counter 1&2 (terminal 7&8)
Frequency 1&2 (terminal 7&8)
Period 1&2 (terminal 7&8)
Frequency
and
Period
share the same
input
(terminal 12). Additionally, the RM
Young sensor type requires the use of this input too. Only one of these should be
set up at a time.
Frequency
will have X-Link sample the input for 750ms. It will provide a result
that is the average frequency of the input during that time span. If no signals are
noticed on the input during the time, the measurement is considered bad.
10kHz is the maximum input frequency that X-Link supports.
When
Period
is the chosen type, X-Link will watch the input line for up to 10
seconds. X-Link stops watching as soon as one wave period is noticed on the
input. If the input signal does not transition during this time, the measurement is
considered bad.
Digital measurements also use the
Warmup
setting. If
Warmup
is not zero, then
switched power and VREF will be turned on during a
Digital
measurement. See
the section on analog measurement types for details on
Warmup.
