2 .
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 succes-
sion takes the unit out of OPERATE mode and causes the COMMAND
MENU to appear.
COMMANDS (VERSION 3.0.00)
-------------------------
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.
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 below.
PATH LENGTH (cm) CH DELAY(uS) CL
------------------------------------
A 15.341 1 19.650 516
4 19.550 484
B 15.245 2 23.875 570
5 23.750 524
C 15.146 3 26.675 511
6 26.500 466
OUTPUT FORMAT: CUSTOM
34567 [ 3D-SPEED AZIMUTH ELEVATION SOS Ts ]
WIND SPEED UNITS: m/s
OUTPUT RATE: 4 Hz
SAMPLES FOR AVERAGE: 0
MODE: AUTO
WAKE CORRECTION: YES
ERROR HANDLING: OMIT INVALID DATA
VOLTAGE OUTPUT FORMAT: SPEED, AZIMUTH, ELEVATION, TEMP
VOLTAGE OUTPUT SCALE: 0 TO 40 m/s = 0-4000 mV
0 TO 540 DEG AZIMUTH = 0-4000 mV
-60 TO +60 DEG ELEVATION = 0-4000 mV
220 K to 320 K = 0-4000 mV
CORRELATION TOLERANCE: 125
COMPARE SHIFT: 0
MANUAL GAIN: 0
AGC LEVEL: 1125
AGC INCREMENT: 5
HI SPEED ADC SAMPLES: 10
THRESHOLD: 20 cm/s
TRANSDUCER FREQ REF: 8333
TRANSDUCER FREQ: 245.7 KHz
ACCESS LEVEL: NORMAL
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
M)
MODE
N)
SCALING
O)
OUTPUT RATE
P)
POLL CHARACTER (ADDR)
S)
SERIAL OUTPUT FORMAT
T)
THRESHOLD
U)
UNITS
V)
VOLTAGE OUTPUT 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 all measurements including voltage inputs. Aver-
aged results appear in both serial output and voltage output formats.
For no averaging, set NUMBER OF SAMPLES TO AVERAGE to
0
. Otherwise, set it to the number of output samples to be used for
calculating the block average.
The rate at which block averages
are output is determined by OUTPUT RATE and NUMBER OF
SAMPLES TO AVERAGE parameters.
For example, if OUTPUT
RATE is 4 Hz and NUMBER OF SAMPLES TO AVERAGE is 8, the unit
will produce a block average output once every 2 seconds (0.5 Hz).
4 samples x 1 avg result = 1 avg result
second 8 samples 2 seconds
NUMBER OF SAMPLES TO AVERAGE: 0
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).
BAUD: 38400
----------------------
A)
1200
B)
2400
C)
4800
D)
9600
E)
19200
F)
38400
X)
EXIT TO MAIN MENU
6.3 ERROR HANDLING
ERROR HANDLING determines the manner in which invalid mea-
surements are handled. Invalid measurements can occur when the
acoustic path of the sonic signal is blocked or internal circuits fail.
Acoustic blockage make be caused by rain drops, ice, snow, or
other debris. When set to INCLUDE INVALID DATA, an output
always occurs. If CUSTOM serial output is used, an ERROR CODE
may be included in the output to indicate the error condition. When
set to OMIT INVALID DATA, invalid measurements are not output.
See VOLTAGE OUTPUT for details regarding this setting when that
output is used.
ERROR HANLDING: 2
-----------------
1)
INCLUDE INVALID DATA
2)
OMIT INVALID DATA
X)
EXIT
6.4 MODE
MODE sets the method by which internal samples are processed to
produce output samples. MODE may be set to MEAN, MEDIAN, or
AUTO. MEAN averages internal samples to produce an output
sample and is recommended for low wind velocities (<5 m/s).
MEDIAN finds the median of internal samples to produce an output
sample and is recommended for higher velocities (>5 m/s). AUTO
switches between MEAN and MEDIAN at 5 m/s to offer optimal
performance over an extended range.
Do not confuse MODE with AVERAGING described above. Also, do
not confuse internal samples with output samples (See OUTPUT
RATE).
MODE
3
---------------------
1)
MEAN
2)
MEDIAN
3)
AUTO
X)
EXIT TO MAIN MENU
