Young Ultrasonic Anemometer Marine Model Model 85106 - Manual (Page 8)

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85106-90
SET13nn ASCII and Vout format (00=polar, 01=UV)
SET14nn Vout Status Code (1=none, 2=0V, 3=FS)
CALnn Force Vout (00=0V, 01=5V)
XX Go to OPERATE MODE
RPT Report parameter settings
?? Help list
6.4 COMMAND DETAILS
6.4.1 SET01nn SET OUTPUT MODE
This parameter independently enables and disables voltage
output, RS-232, and RS-485 connections. For example, to enable
voltage output, RS-232, and RS-485 full duplex, add the code for
each one: 01 + 02 + 04 = 07, SET0107. To enable only RS-232:
SET0102. If RS-485 is used, choose only one RS-485 option (04,
08, or 16). See section 6.3 for codes.
To reduce power consumption, enable only those outputs that
are needed. When SDI-12 format is selected with the SET02nn
command, voltage output, RS-232, and RS-485 connections are
disabled and SDI-12 is enabled.
6.4.2 SET02nn SET OUTPUT FORMAT
This parameter determines the serial output data format. See
section 5.0 for operational details. When selecting some formats,
parameters are automatically changed as listed below:
FORMAT ADDITIONAL
CODE PARAMETERS CHANGED
01 RMYT BAUD = 9600
OUTPUT MODE = 07
THRESHOLD = 25 cm/s
OUTPUT DELAY = 01
SAMPLE COUNT = 31
02 ASCII
03 ASCII POLLED None
04 NMEA BAUD = 4800
OUTPUT MODE = 19
THRESHOLD = 25 cm/s
OUTPUT DELAY = 122
SAMPLE COUNT = 31
05 SDI-12 CONT
06 SDI-12 STANDBY 1200 baud
Both SDI-12 settings automatically disable voltage output, RS-232,
and RS-485 connections. With either POLLED ASCII or SDI-12
STANDBY, set the Damping Factor to 0 (see section 6.4.9).
6.4.3 SET03nn SET BAUD RATE
All RS-232 and RS-485 communication use the baud rate set with
this parameter. Power consumption is affected by this setting since
it influences communication duration.
6.4.4 SET04nn SET ASCII WIND SPEED UNITS
Sets wind speed units for ASCII, ASCII POLLED, and SDI-12 polar
outputs only.
6.4.5 SET05c SET POLL ADDRESS CHARACTER
Sets the sensor address for ASCII POLLED and SDI-12 formats.
The default is '0' (ASCII 48).
6.4.6 SET06nn SET WIND SPEED THRESHOLD
Sets the wind speed threshold for polar outputs (wind speed and
direction) to suppress scattered wind direction indications in calm
air. Winds below the threshold are reported as zero, wind direction
is held at last value when wind speed was above threshold. Set
threshold in centimeters per second (m/s x 100). The default
setting is 25 cm/s (0.25 m/s, 0.56 mph).
6.4.7 SET07nnnnn SET WIND SPEED MULTIPLIER
All wind speed measurements are multiplied by this parameter.
The default value is 10000 for a multiplier of 1.0000. This may be
used to individually calibrate each sensor for improved accuracy.
6.4.8 SET08nnnnn SET WIND DIRECTION OFFSET
Use this parameter to add or subtract a wind direction offset. Value
is degrees x 10 and may be positive or negative. Wind direction
is always re-scaled to a 0-360 range after offset is applied. The
default value is 00000.
6.4.9 SET09nn SET DAMPING FACTOR
Wind measurement outputs are damped using the following
formula:
S
damped
= [(d-1) * S
damped
+ S
sample
] / d
where:
S
damped
= New or last damped wind speed
S
sample
= New wind speed speed
d = Damping factor
The default value is 4. When set to 00, no damping is applied.
Higher damping factors slow the rate at which the sensor indicates
wind changes.
6.4.10 SET10nnn SET OUTPUT DELAY
Sets the amount of time between measurements in increments of
8.192 milliseconds. The default value is 122 ( 0.9994 seconds).
Lower values (less delay) increase power consumption when
continuous measurements are taken.
6.4.11 SET11nn SET DIRECTION VOUT
Sets wind direction voltage output scale to 0-360 or 0-540
degrees. Use the 0-540 scale if possible. When set to 0-360, wind
directions fluctuating about north cause voltage output swings
between zero and full scale. Data loggers or display systems may
sample during these transitions causing erroneous readings. A
0-540 scale eliminates output transitions with northerly wind.
Data in 0-540 form may be re-scaled to 0-360 by subtracting 360
degrees from any value greater than or equal to 360. The default
parameter setting is 0-360 for systems that cannot re-scale the
0-540 output.
6.4.12 SET12nn SET SAMPLE COUNT
All measurements are calculated from the median of 3 to 31
sample sets. More samples consume more power. More samples
are required at higher wind speeds or in conditions where adequate
samples are difficult to acquire. If SAMPLE COUNT is set to 00,
the sensor automatically uses the minimum number of sample sets
needed to produce valid data. However, when powered up for the
first time or when polling at intervals longer than a few seconds,
the sensor may require more than one measurement cycle to
determine the optimum number of sample sets.
In applications where power consumption is not an issue or where
the sensor must acquire results on the first measurement cycle, the
SAMPLE COUNT may be set manually to the highest anticipated
wind speed (m/s) up to 31 which is the maximum SAMPLE COUNT
value. Wind speeds above 31 m/s will use 31 sample sets.
6.4.13 SET13nn SET ASCII and Vout FORMAT
Serial ASCII and ASCII POLLED formats may be set to provide
wind data in either Polar (speed and direction) or Cartesian (UV)
form. This setting also determines the whether voltage outputs are
in Polar or Cartesian format.
00= Polar, 01=Cartesian (UV).
6.4.14 SET14n SET VOLTAGE OUTPUT STATUS