ESBD_434676_1752244448657_582-25-08654 Attachment D.pdf

Solicitation Name: Ultrasonic Weather Sensor Solicitation Number: 582-25-08654

Attachment D Specifications for an Ultrasonic Weather Sensor

Description: The Ultrasonic Weather Sensor will use ultrasonic technology to measure wind speed and wind direction, be of solid-state construction and have no moving parts. It will also be configured to measure ambient temperature, relative humidity, and barometric pressure. In addition, it will have a built-in compass to automatically align to magnetic north.

MINIMUM GENERAL SPECIFICATIONS

The Ultrasonic Weather Sensor system must meet the following requirements.

A. The system must measure the following parameters:

i. Wind speed in miles per hour (mph)

ii. Wind direction in degrees

iii. Ambient temperature in degrees Fahrenheit (°F)

iv. Relative humidity,

v. Barometric pressure in hectopascal (hPa), B. The system must be configured for Serial Digital Interface at 1200 baud (SDI12) output.

C. The system must contain an internal compass for automatic direction alignment to magnetic north and a user option to enter a declination to correct to true north.

D. The system must have an Environmental Protection Agency Parameter Code and Method Code listed in EPA Sampling Methods for Meteorological Parameters, AQS Reference Table, and be listed in the table.

E. Must include mounting and alignment adapter and mounting kit.

F. Must include 15-meter communication cable.

The Ultrasonic Wind Sensor shall meet or exceed the following measurement criteria:

A. Wind Speed

i. Operating Range: 0 to 75 meters/second (m/sec) (0 to 168 mph)

ii. Calibrated Range: 0 to 60 m/sec (0 to 134 mph)

iii. Accuracy: ±0.5 m/sec or 5% of reading

iv. Resolution: 0.1 m/sec

v. Threshold: < 0.2 m/sec

vi. Response Time: 1 second

B. Wind Direction

i. Range: 0° - 360 degrees (°)

ii. Accuracy: ± 5°

iii. Resolution: 1.0°

iv. Threshold: < 0.2 m/sec

v. Response Time: 1 second

C. Temperature

i. Range: -40 degrees Celsius (°C) to +60°C (-40°F to +140°F)

ii. Accuracy: ±0.2°C from 0 to 60°C and ±0.5°C from -40°C to 0°C

iii. Resolution: ±0.1°C

iv. Response Time: 1 second

D. Relative Humidity

i. Range: 0 to 100%

ii. Accuracy: ±3%

iii. Resolution: 1.0%

E. Pressure

i. Range: 500 to 1100 hPa

ii. Accuracy: ±0.5 hPa at 25°C

iii. Resolution: 0.1 hPa

F. Compass Alignment

i. Accuracy: ±2°

ii. Resolution: 1.0°

G. Electrical

i. Measurement Rate Output: User selectable from 1 to 60 Hertz (Hz).

ii. Signal Output: SDI12

iii. Power: 8-36 Volts Direct Current (VDC)

H. Environmental Operating Ranges

i. Temperature: -40 to +140 °F

ii. Humidity: 0 to 100%

ADDITIONAL TERMS AND CONDITIONS

1. All items must be bid new, of current production, and include the manufacturer’s standard parts and accessories.

2. The warranty period should consist of complete coverage of system onsite, parts, and labor for a minimum of one year from the date of acceptance.

3. A minimum of one (1) electronic manual must be included. The manual will include complete operating instructions, circuit descriptions, theory of operation, location of controls and switches, software commands, maintenance, and service instructions. The manual will also include schematic diagrams, pneumatic flow charts, lists of commonly replaced parts, warnings, and safety precautions.

4. Technical support must be available for TCEQ staff between the hours of 8 a.m. and 5 p.m. Central Standard Time (CST) during regular business days, Monday through Friday, by telephone and electronic mail (e-mail).

5. Systems ordered and received by TCEQ will be tested upon receipt.

Testing will not take more than 45 days. Payment will be made within thirty (30) days after tests have been completed and the instrument has been shown to meet specifications or the day that the invoice was received, whichever is later.

Specifications for an Ultrasonic Weather Sensor