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When wind speed is below threshold level, azimuth output is
maintained at the last value read before the wind speed went
below threshold. Elevation also remains zero until threshold
is exceeded. Speed of sound ranges from 300 m/s to 360 m/s
depending on temperature. At 20°C the value is about 344 m/s.
Sonic temperature may be compared to a standard Celsius
thermometer and should agree within ±2°C. If values appear
questionable or any value is not displayed, remove power and
check all wiring connections. If the problem cannot be corrected,
contact your YOUNG representative.
4. Verify sensor response by gently blowing through the measuring
section. Wind from the north side (marked "N"), should produce a
positive SPEED response and an AZIMUTH display corresponding
to North (i.e.: values around 359.9 or 0.0 ). Wind from the opposite
direction should produce values indicating south, (around 180.0)
and so forth. Downward wind produces negative ELEVATION
values, upward wind produces positive values.
After proper operation is confirmed, the sensor may be installed.
Complex data collection or serial communication schemes should
be tested and verified before final installation. It is easier to confirm
wiring connections and communication protocol on a test bench
than a tower. Factory settings may be changed by following the
instructions in the next section.
4.0 COMMAND MENU
Sending the ESC character (ASCII 27) three times in quick
succession takes the unit out of OPERATE mode and causes the
COMMAND MENU to appear.
COMMANDS
-------------------------
R) REPORT
S) SETUP
X) EXIT TO OPERATE MODE
Access each menu item by sending the character associated with
the menu item of interest. Characters may be upper or lower case.
Send "X" to return to OPERATE mode. The following paragraphs
explain the function of each menu item and associated sub-menu.
The version number may differ from that shown above.
NOTE: Command menu access requires standard RS-232 or
full-duplex RS-485 non-bussed communication.
5.0 REPORT
REPORT summarizes current parameter settings. Some parameters
are for factory diagnostics only and cannot be accessed or altered
by the user. Typical values appear as follows:
PATH
LENGTH(cm)
CHAN
------------------------------------------
A
15.117
0
3
B
15.152
1
4
C
15.193
2
5
SERIAL OUTPUT FORMAT: CUSTOM
789AB [ 3-D SPEED AZIMUTH ELEVATION SOS Ts ]
WIND SPEED UNITS: m/s
OUTPUT RATE: 4 Hz
SAMPLES FOR AVERAGE: 0
WAKE CORRECTION: YES
SCALING MULTIPLIER: 10000
ERROR HANDLING: OMIT INVALID DATA
VIN FS CALIBRATIONS: 3879 3800 3876 3879
HI SPEED ADC SAMPLES: 5
WS THRESHOLD (cm/s): 20
ACCESS LEVEL: NORMAL
EEPROM CHKSUM: 8F49
81000V-90(L)
DELAY(µS)
CMP
14.250
0622
14.250
0618
14.750
0628
14.750
0617
13.500
0611
13.500
0600
6.0 SETUP
SETUP allows editing operating parameters to suit the needs of a
particular application. The SETUP menu and detailed explanation of
each menu item follows:
SET PARAMETERS
-------------------------
A) AVERAGING
B) BAUD
E) ERROR HANDLING
N) SCALING MULT
O) OUTPUT RATE
P) POLL CHARACTER (ADDR)
S) SER OUT FORMAT
T) THRESHOLD
U) UNITS
V) V OUT FORMAT
W) WAKE CORRECTION
X) EXIT TO MAIN MENU
6.1 AVERAGING
AVERAGING sets the number of output samples used to calculate
block averages of wind measurements. With NUMBER OF
SAMPLES TO AVERAGE set to 0, no averaging takes place.
The block average update rate is a function of OUTPUT RATE and
NUMBER OF SAMPLES TO AVERAGE.
Update Rate (Hz) = (OUTPUT RATE) / (SAMPLES TO AVG)
NUMBER OF SAMPLES TO AVERAGE:
ENTER NEW VALUE (0 - 320):
6.2 BAUD RATE
BAUD sets the baud rate for serial communication. Faster baud
rates may be required if the output string is long and the output rate
is fast (see OUTPUT RATE). There is also a setting for HALF or
FULL duplex RS-485.
installations where minimal wiring is required and the unit is set
for continuous output. Use FULL duplex when polling or frequent
parameter changes are anticipated. Note that the DUPLEX setting
applies to RS-485 only since the RS-232 is always full duplex by
default.
BAUD: 38400
----------------------
A) 1200
B) 2400
C) 4800
D) 9600
E) 19200
F) 38400
X) EXIT TO MAIN MENU
FOR RS-485 ONLY!
DUPLEX = 2
-----------------------
1) HALF
2) FULL
X) EXIT TO MAIN MENU
Page 2
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HALF duplex may be used in simple
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