SCARLET TECH WL-21 Wireless Anemometer User Guide

WL-21
Wireless Anemometer User Guide

Introduction

WL-21 is a high-performance wireless wind speed and direction data logger for industrial applica­tions and long-term environmental monitoring. It consists of a long-range wireless wind speed and direction sensor (up to 500 meters) and a portable data logger display.
The system measures and displays current/average/maximum wind speed, wind direction, temperature, wind chill, Beaufort scale, atmospheric pressure, and historic data graphics in high accuracy with multiple measurement units. Users are able to set wind speed threshold and receive instant alarm notifications when wind speed exceeds the set threshold.

WL-21 also supports data logging and can export data in excel format to computers by using a micro USB output.![SCARLET TECH WL 21 Wireless Anemometer

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Sensor & Receiver

Sensor

Wireless Connection
Each sensor has a unique wireless address number that has been pre-paired corresponding to the receiver display. One sensor can be connected to multiple receivers. Several anemometers can operate in close proximity without disturbance.
Transmission Range
The connection between sensor and receiver goes through a Sub-1GHz wireless band (868, 915 MHz). The signal strength is shown on the receiver MAIN page. The transmission range between the sensor and the receiver can reach up to 500 meters in a direct line of sight. Inside buildings or obstacles in between may decrease the transmission range.
Wind Direction Measurement
WL-21 Sensor equips with a wind vane that measures the direction where the wind originates. The wind vane features a metal pointer front and a tail in the back. In a north wind, the wind vane points northward, and the display reads as N and 0°.

Receiver

|
---|---

Keypad

icon| Name|

Functions

---|---|---
| Power| Power ON / OFF
| Settings| Go to the Main / Settings page
| Enter| Select; Confirm
| Cancel| Cancel; Go back to the previous page
| Up| Up; Increase number; Change option
| Down| Down; Decrease number; Change option
| Left| Previous page
| Right| Next page

Installation Guide

Sensor Installation
WL-21’s package comes with a Magnetic Sensor Mounting Bracket that supports fast and flexible installation.

1. Loosen the clamp
2. Insert the sensor body from the bottom of the clamp
3. Tighten the clamp
4. Apply wind cups on the wind sensor rotation shaft
5. Make sure you hear a “CLICK” sound that indicates all parts are locked in place.
6. Attach the bracket to the desired magnetic surface

Note: Always do orientation correction after deploying the wind sensor. (see Wind Direction Sensor Correction, P16)

Receiver Installation
WL-21’s Receiver Holder Kit comes with an anti-slip display holder with neodymium magnets on both ends and three pieces of adhesive metal flakes.

1. Peel off the backing paper of the metal flake to reveal the adhesive side
2. Press and stick the adhesive side of the metal flake to the Receiver’s back cover
3. Attach the Receiver to the display holder magnetically

You can attach the receiver holder to any magnetic surface or adhere the metal flake on the non-magnetic surface first before attaching the magnetic display holder.

Navigation Diagram

After the Receiver is powered on, the receiver will enter the MAIN page. Users can press the Right/Left and Settings /Cancel buttons to navigate through the pages.
: Switching by Right and Left buttons
: Switching by Settings and Cancel buttons
: Switching by entering and Cancel buttons

MAIN page

Number

| Name|

Definition

---|---|---
1| Signal Strength| The wireless signal strength between sensor and receiver
2| Receiver Power| Receiver battery level or power supply through micro USB
3| Date| The current date in DD/MM/YY
4| Data Logging| Indicate the data logging function is turned ON
5| Time| Current time in HH: MM (24hr military time)
6| Wind Alarm Threshold| The set wind speed alarm trigger threshold
7| Wind Speed| Current wind speed
8| Wind Speed Unit| Set wind speed unit (m/s, km/hr, MPH, knots)
9| Beaufort Scale| Beaufort wind force scale (unit BFTS, 12 levels in total)
10| Wind Direction Indicator| An azimuth diagram with a dot that indicates where the current wind is from. (8 directions, North at the top)
11| Wind Direction (Cardinal Direction)| The current wind direction in E, W, S, N, SE, NE, SW, NW
12| Wind Direction (Degrees)| The current wind direction in degrees, N=0°, E=90°, S=180°, W=270°
13| Temperature| Current temperature (Unit: °C, °F)

AVG/MAX page  

Item

| Name|

Definition

---|---|---
1| Maximum Wind Speed| Maximum wind speed for the past 12 hours since receiver turns on (display after the first hour)
2| Average Wind Speed| Average wind speed for the past 12 hours since receiver turns on (display after the first hour)
3| Wind Chill| Current wind chill index
4| Atmospheric Pressure| Current atmospheric pressure

CHART page

Item| Name|

Definition

---|---|---
1| Wind Speed Value| Show wind speed value. (0 to max selectable unit)
2| Time| Show the past 12 hours from the current time (from -1 to -12, one column represents an hour)
3| Maximum Wind Speed| Maximum wind speed in the time period
4| Average Wind Speed| Average wind speed in the time period

HISTORY page

Item

| Name|

Definition

---|---|---
1| Wind Speed Unit| Set wind speed unit (m/s, km/hr, MPH, knots)
2| Average Wind Speed| Average wind speed of the corresponding period
3| Maximum Wind Speed| Maximum wind speed of the corresponding period
4| Average Temperature| The average temperature of the corresponding period
5| Average Wind Direction| The average wind direction of the corresponding period
6| Time Period| The past 12 hours of wind data from the current time (from -1 to -12)

SETTINGS Page

direction
3| Data logging page| Data logging setting and management
4| General page| General setting page
5| Version| Current receiver firmware version info

WIND SPEED settings page

knots
2| Alarm| Wind speed alarm function: ON (default) /OFF
3| Alarm Threshold| Wind speed alarm threshold: 1 to 180 at the selected unit, (default: 18)

WIND DIRECTION settings page

set

DATA LOGGING settings page

min, 5 min, 10 min, 60 min
3| Clear data| Clear all data to release the memory Available memory
4&5| Available Memory| Remaining data storage space in percentage

GENERAL settings page

this receiver
4| Temperature unit| Unit for temperature measurement: °C (default), °F
5| Atmospheric pressure unit| Unit for atmospheric pressure measurement: hPa (default), mm Hg, bar
6| Display auto-off| Display automatically switch to power saving mode after the set idle period: OFF (default), 5 min, 10 min, 30 min
7| Sensor Battery| Battery power percentage of the wireless sensor

Functions

Sensors Pairing
The wireless address number is labeled on the sensor body, as well as in the setting of each receiver.

Change receiver wireless address:

1. Press the Settings button go to the SETTINGS page
2. Press Enter on GENERAL to go to the GENERAL setting page
3. Press Up/Down to move the selection cursor to SENSOR ADDRESS, and then press Enter to modify the pairing address.
4. When the address number is blinking, press Up/Down to change the number to the desired sensor address, and then press Enter to confirm.
5. When the sensor and receivers are wirelessly connected, the receiver’s LED indicator will beep twice and flash the GREEN light twice.

When the wireless connection between sensor and receiver is lost for over 10 minutes, the LED indicator will flash red light every 10 seconds.
Time and Measurement Units Setting
Change date, time, temperature unit, atmosphere pressure units:

1. Press the Settings button go to the SETTINGS page
2. Press Enter on GENERAL to go to the GENERAL setting page
3. Press Up/Down and Enter to select and change the section unit

Change wind speed measurement unit:

1. Press the Settings button go to the SETTINGS page
2. Press Enter on WIND SPEED to go to the WIND SPEED setting page
3. Press Enter on Wind SPEED UNIT
4. Press Up/Down and Enter cursor to select the unit: m/s (default), km/hr, MPH, knots

Wind Direction Correction
Please refer to the following steps to correct the default orientation. Always do correction after wind sensor deployment.

1. Turn on Receiver, press the Settings button to go to the SETTINGS page
2. Press Up/Down to move the selection cursor to WIND DIRECTION, and then press Enter to go to the WIND DIRECTION settings page. Wait a few seconds for the Receiver-Sensor connection.
3. Press Enter on CORRECTION OF WIND DIRECTION to start orientation correction. Follow the instruction on the screen, and orient the Sensor’s wind vane pointer to the True North.
4. Press Enter on CONFIRM to determine the North direction in WL-21.
5. The LAST CORRECTION date will be updated when orientation correction succeeds.

Please make sure the Sensor and Receiver are wirelessly paired throughout the wind direction correction. (see Sensors Pairing). If the Receiver fails to connect with the Sensor during the process, users will be back to the SETTINGS page and need to set it again.

Wind Speed Alarm
WL-21 Receiver’s built-in buzzer will be triggered when the wind speed exceeds the set threshold. The display backlight flashes AMBER and the LED indicator continuously blinks in RED.
Set alarm threshold:

1. Press the Settings button go to the SETTINGS page
2. Press Enter on WIND SPEED to go to the WIND SPEED setting page
3. Press Enter on ALARM THRESHOLD
4. Press Up/Down and Enter to set the wind speed alarm threshold

Turn on alarm function:

1. Press the Settings button go to the SETTINGS page
2. Press Enter on WINDSPEED to go to the WINDSPEED setting page
3. Press Enter on ALARM
4. Press Up/Down to select ON and press Enter to confirm the setting.

Data Logging
WL-21 Receiver is equipped with a 64MB built-in memory that is capable of recording average wind speed, maximum wind speed, average wind direction, average air temperature, and average atmospheric pressure during the selected logging interval.
Set Logging Interval: (default interval: 10 seconds)

1. Press the Settings button go to the SETTINGS page
2. Press Up/Down and Enter to go to the data logging setting page
3. Press Enter on LOGGING INTERVAL and press Up/Down to select desired logging interval (Supported logging interval: 2 sec, 5 sec, 10 sec, min, 5min, 10min, 60 min)

The logging interval can only be altered while the data logging function is OFF.
Start Logging:

1. Go to the DATA LOGGING setting page (see steps above)
2. Press Enter on LOGGING
3. Press the Up/Down cursor to select ON
4. Select YES to confirm to start data logging
5. REC will display on-screen in the top left corner to indicate the data logging function is ON

When the data logging function is ON, the receiver cannot be turned OFF.
Finish Logging:

1. Go to the LOGGING setting (see steps above)
2. Press the Up/Down cursor to select OFF
3. Select Yes to confirm to stop data logging
4. A logged file will be created and stored at the receiver when the logging status switch from “ON” to” OFF”

There are 2 conditions that will automatically turn the data logging function OFF:

• The battery level of the receiver is under 5%.
• There is no available memory space in the receiver

For long-term data recording, Scarlet recommends supplying the receiver power through a micro USB cable or making sure the battery power for the receiver is sufficient for the entire logging period.

Data Export
To export the logged file from the receiver, use your Windows PC to install the Data Export Software, ” ScarletWind”.

1. Download and unzip the “ScarletWind.zip” file to your PC from Scarlet’s website.
   https://scarlet-tech.com/wo-content/uoloads/ScarletWind/ScarletWind.zig

2. Connect the receiver to the PC via a micro USB cable
   Make sure the data logging feature is turned OFF (see Finish Logging) A new USB device will show up on your devices list indicating the receiver is connected to your computer

3. Double click to run the data export software “ScarletWind”

4. Select the COM Port of your receiver then press the “Download” button
   

5. Select the destination folder for the log files
   

6. Select the export file type (.xlsx or .xls)
   

7. WL•21 will start exporting the logged files.
   The receiver will display “Data Downloading” during the process.
   

8. Wait for the “Finish” pop-up that indicates the data exporting is complete
   Depending on the data amount and PC performance, the time will vary from a few minutes up to half an hour.

*Please update the USB driver if the COM port is unidentified.

1. Go to “Device Manager”

2. Select the update the “Unknown Device” (or “USB Serial Port”) with an exclamation mark.

3. Right-click to update the driver
   

4. Select the driver software “NuvotonCDC” in the receiver USB drive to update

Power Saving Mode
In power-saving mode, the receiver display will temporarily turn off to reduce power consumption and the LED indicator will light GREEN every 10 seconds. All function remains working, including alert and logging. While the wind speed alarm function is ON, the buzzer will be triggered when the wind speed exceeds the set threshold.
Enable power-saving mode:

1. Press the Settings button go to the SETTINGS page
2. Press Enter on GENERAL and Down to go to the 2nd page of the GENERAL setting
3. Press Enter to select DISPLAY AUTO OFF
4. Press the Up/Down cursor to set the idle period:5min, 10min, 30min

The receiver display will automatically turn off after the set idle period to save battery power. The display will resume when any key is pressed.
Power Off

1. Press the Settings button go to the MAIN page
2. Long press the power button for 5 seconds

When the data logging function is ON, the Receiver cannot be powered-off by pressing the power button directly.

Technical Specifications

Wireless Sensor

Item

|

Definition

---|---
Frequency| 868MHz, 915MHz
Distance| Max 500m* (depends on the applied environment)
Data Rate| Every 2 seconds
Power Supply| 3.6V 18505 Lithium battery xl
Waterproof Rating| IP67
Weight| 172g
Dimension| 203 x 300 x32 mm

Receiver

Item

|

Definition

---|---
Receiver Buzzer| > 80dB
Built-in Memory| 64MB
Output| xlxs, .xls
Data Logger|

• Average wind direction
• Average wind speed
• Maximum wind speed
• Average temperature
• Average atmospheric pressure

Logging Interval| 2 seconds, 5 seconds, 10 seconds (default), 1 minute, 5 minutes, 10 minutes, 60 minutes
Power Supply| 1.5V AA battery x3 Micro USB port
Dimension| 189.6 x 75.6 x 36.3mm
Weight| 290g

Wind Speed Sensor

Item

|

Definition

---|---
Measurement Unit| m/s (default)
knots
MPH
km/hr
Measurement Range| 0.3…50 m/s
Measurement Resolution| 0.1 m/s
0.1 knots
0.1 MPH
0.1 km/hr
Measurement Accuracy| ±2% FS

Wind Direction Sensor

Item|

Definition

---|---
Measurement Range| 0…359° no blank sector
Measure Resolution|

1°

Measurement Accuracy| +1°

Temperature Sensor

Item

|

Definition

---|---
Measurement Unit| °C (default)
°F
Measurement Range| –30°C…60°C
Measurement Resolution| 0.1°C 0.1°F
Measurement Accuracy|  ±1°C

Atmospheric Pressure Sensor

Item

|

Definition

---|---
Measurement Unit| hPa (default; mmHg bar
Measurement Range| 500…1100 hPa
Measurement Resolution| 1 hPa 0.1 mmHg 0.001 bar
Measurement Accuracy| ±4 hPa

Package Content

• Wireless Sensor
• Wind Cups
• Receiver
• Receiver Antenna
• Receiver Holder

|

• Adhesive Metal Flakes x 3 (for Receiver Holder installation)
• Magnetic Sensor Mounting Bracket
• AA Battery x 3 (for Receiver)
• 6V 18505 Lithium battery xl (placed in Sensor)
• User Manual & Certificate

---|---

Optional Accessories

• Spare Wind Cups
• Spare Sensor Battery (3.6V 18505 Lithium battery)
• External Antenna

Safety, Maintenance, & Warranty

Operating Environment
The operating temperature of the anemometer system is designed to work in an ambient tempera­ture between 5°C to 60°C (40°F to 140°F) at 20-80%RH. The storage temperature is between -20°C to 60°C (-4°F to 140°F). The instrument can be damaged if stored and operated outside of these temperature ranges. Avoid exposing the instrument to extreme changes of weather and or tempera­ture in a continuous short period of time.
Sensor Battery Replacement
The wireless sensor is powered by a 3.6V 18505 Lithium battery. Its battery can be checked by the Receiver (See GENERAL settings page)

• Turn the battery cap near the wind vane counterclockwise to remove it.

• Take out the battery container from the sensor.

• Replace the battery with a new 3.6V 18505 Lithium battery.
  

• Put back the battery container into the sensor (Please note the placement direction).
  

• Make sure the 0-ring is correctly aligned to the battery cap for waterproof protection.

• Put back the battery cap in a clockwise direction to finish the battery changing.

Receiver Battery Replacement
The receiver is powered by 3 M 1.5V batteries. The battery level is displayed on the top of the display. (See the MAIN page)

• Remove the screw and then remove the battery cover on the back.
• Replace the batteries with 3 new 1.5V M batteries.
• Place back the battery cover and fasten the screw.

Warranty Conditions
This instrument is guaranteed a one-year limited warranty against material or production defects, in accordance with our general sales conditions. During the warranty period, Scarlet Tech reserves the right to decide either to repair or replace the product.
Should you need any reason to return the instrument for repair or replacement, take prior agreements with the local distributor from whom you bought it. Please use the original packaging for return. Do not forget to enclose a report describing the reasons for returning (detected fault). Any damage that occurred in transit due to non-original packaging will be charged to the customer.
Scarlet Tech’s One-year Limited Warranty does NOT apply to:

• Accessories and batteries (not covered by warranty)
• Repairs made necessary by improper use or improper combination with incompatible accessories or equipment.
• Repairs made necessary by improper shipping material causing damages in transit.
• Repairs were made necessary by previous attempts for the repair carried out by non-skilled or unautho­rized personnel.
• Instruments for whatever reason modified by the customer himself without the explicit authoriza­tion of our Technical Dept.

The contents of this manual may not be reproduced in any form whatsoever without the authoriza­tion from Scarlet Tech.

Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
• Consult the dealer or an experienced radio/TV technician for help.

FCC Caution:
To assure continued compliance, any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment. (Example- use only shielded interface cables when connecting to computer or peripheral devices).

**FCC Radiation Exposure Statement

**

This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20 centimeters between the radiator and your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
The antennas used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co- located or operating in conjunction with any other antenna or transmitter.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation.

Scarlet Tech Co., Ltd.
© 2021 Scarlet Tech Co., Ltd. All rights reserved.
4F-3, No. 347, HePing E Rd, 2nd Sec, Daan District, Taipei City 106, Taiwan
info@scarlet.com.tw
www.scarlet-tech.com
version 210813

Documents / Resources

| SCARLET TECH WL-21 Wireless Anemometer [pdf] User Guide
STWL21, 2A2MWSTWL21, WL-21 Wireless Anemometer, WL-21, Wireless Anemometer
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