Young Ultrasonic Anemometer Voltage Inputs Model 81000V Manual de usuario descargar pdf (Pagina 2)

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81000V-90

MODEL 81000V

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 INPUT (4 CHANNELS)

Range: 0 to 5000mV V1 and V2

0 to 1000mV V3 and V4

Resolution: 1 part in 4000

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 81000V 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. Four voltage input

channels measure DC signals from external sensors concurrent

with wind measurements

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.

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 Outputs:

- 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 Inputs:

- Channel V1: 0-5000mV Full Scale

- Channel V2: 0-5000mV Full Scale

- - Channel V3: 0-1000mV Full Scale

- Channel V4: 0-1000mV Full Scale

NOTE: Factory default settings omit voltage input

measurements from the serial output string. To in-

clude them, set CUSTOM or POLL CUSTOM serial

output format. See section 6.7. All analog input mea-

surements are normalized to a 0-4000 unitless scale

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.

3. Apply power to the 81000V sensor. There will be a 4 second

delay for initialization then the unit will begin to output data at

four times per second using the following format: speed (m/s)

azimuth (deg) elevation (deg) speed-of-sound (m/s) sonic-tem-

perature (°C). Verify that all values are present on the display.

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