0 specification summary, 0 introduction, 0 initial checkout – Young Ultrasonic Anemometer Voltage and Serial Output Model 81000 User Manual
Page 2: Ultrasonic anemometer
Page 1
81000-90
MODEL 81000
ULTRASONIC ANEMOMETER
1.0 SPECIFICATION SUMMARY
WIND SPEED
Range:
0
to
40
m/s
(0
to
90
mph)
Resolution:
0.01
m/s
Threshold:
0.01
m/s
Accuracy:
±1%
rms
±0.05
m/s
(0
to
30
m/s)
±3%
rms
(30
to
40
m/s)
WIND DIRECTION
Azimuth
Range:
0.0
to
359.9
degrees
Elevation
Range:
±60.0
degrees
Resolution:
0.1
degree
Accuracy:
±2°
(1
to
30
m/s)
±5°
(30
to
40
m/s)
SPEED OF SOUND
Range:
300
to
360
m/s
Resolution:
0.01
m/s
Accuracy:
±0.1%
rms
±0.05
m/s
(0
to
30
m/s
wind)
SONIC TEMPERATURE
Range:
-50
to
+50
ºC
Resolution:
0.01
ºC
Accuracy:
±
2
ºC
(0
to
30
m/s
wind)
VOLTAGE OUTPUT (4 CHANNELS)
Range:
0
to
5000
mV
Resolution:
12
Bit
Accuracy:
±
0.1%
of
full
scale
GENERAL
Air sample column:
10 cm high X 10 cm diameter
Air
sample
path:
15
cm
Output
rate:
4
to
32
Hz
(selectable)
Output
formats:
Serial
data
(selectable)
RS-232
and
RS-485
Baud
Rates:
1200
to
38400
Power Supply:
12 to 24 VDC, 110 mA
Dimensions:
Overall
height
56
cm
Support
arm
radius
17
cm
Mounting
34
mm
(1.34
in)
diameter
(standard
1
inch
pipe)
Weight:
Sensor
weight
1.7
kg
(3.8
lb)
2.0 INTRODUCTION
The Young Model 81000 measures three dimensional wind velocity
and speed of sound based on the transit time of ultrasonic acoustic
signals. Sonic temperature is derived from speed of sound which is
corrected for crosswind effects.
Measurement data are available as serial output using RS-232 or
RS-485 connections. A variety of serial output formats are avail-
able including a custom format which is easily set by the user.
Four voltage output channels representing sonic temperature and
wind in either Cartesian or Polar coordinates are also provided.
Operating parameters may be edited via simpli ed menus using
an ordinary serial communication program like HyperTerm. All
parameters are stored in non-volatile memory.
Superior environmental resistance is achieved by using UV stabi-
lized thermoplastic, stainless steel, and anodized aluminum com-
ponents. Electrical connections are made via an easily accessible
junction box. The unit mounts on standard 1 inch pipe, outside
diameter 34mm (1.34").
3.0 INITIAL CHECKOUT
Carefully unpack the unit and inspect for physical damage. Any
damage should be reported to the shipper. The sensor arrives fully
calibrated and ready to use.
FACTORY
DEFAULT
CONFIGURATION:
Serial Output:
-
RS232
at
38400
Baud
-
ASCII
Text
Serial
String
Wind
Speed
-
3D
(m/s)
Direction
(Deg)
Elevation
(Deg)
Speed
of
Sound
(m/s)
Sonic
Temperature
(°C)
Analog Voltage Outputs:
-
Channel
V1: Wind
Speed
(3D)
0-5000
mV
=
0-50
m/s
-
Channel
V2: Wind
Direction
0-5000mV
=
0-540
Deg
-
-
Channel
V3: Elevation
0-5000mV
=
-60°
to
+60°
-
Channel
V4: Sonic
Temperature
0-5000mV
=
220K
to
320K
A simple four-step operational check may be performed as follows:
1. Remove junction box cover. Connect power and signal wires
to terminals as indicated in wiring diagram (APPENDIX A) for
RS-232 OUTPUT. Connect serial cable to computer COM
port.
2. Start a serial communications program (like HyperTerm) with
baud rate at 38400 and ow control set to NONE.