ECOWITT WS90 Manual

Introduction

This device is designed to measure multiple weather parameters, including temperature, humidity, wind speed, wind direction, rainfall, UV, and light intensity.

Please note that this sensor cannot be used alone. The data can be transmitted via the Ecowitt Wi-Fi Gateway or displayed on a receiver console (sold separately). Once the Wi-Fi configuration is complete, the data can be viewed on the Ecowitt app or on the receiver console. To ensure optimal product performance, please read this manual carefully and keep it for future reference.

Figure 1 Ecowitt Ecosystem

General Terms Used in the Manual

Gateway: Also known as a hub, it is a display-less console

Receiver: Refers to the console.

RF: Radio frequency.

It refers to the ISM and SRD SubG (Industrial, Scientific and Medical and Short-Range Devices frequency bands below 1 GHz) for communicating between the console and its sensors.

This frequency is not the same as the 4G modem (LTE) or Wi-Fi working frequencies (2.4 GHz, 5 GHz).) ISM/SRD bands are kept separate from 4G frequencies by national regulations to avoid interference. Typical ISM/SRD frequencies are 915MHz(Americas), 868MHz(Europe), 433MHz(worldwide), 920MHz (Japan, Korea)

Instructions for Use

Part List

1 x WS90 Weather Sensor
1 x User Manual

Size

Figure 2

Overview

Figure 3 Sensor package assembly components

Figure 4 Cal button & Reset button

Optional accessories(sold separately)

Table 1:

Configuration and Mount

Preparations

1. Open the package.
2. Preparing the receiver (gateway or console) to pair with the WS90.

Power up

Battery Usage Warning

Table 2:

Use a screwdriver to open the battery compartment and insert 2 AA batteries. The LED on the back of the sensor will light up for 3 seconds and then blink every 8.8 seconds, indicating that the sensor is transmitting data properly.

If the LED does not light up for 3 seconds or does not blink as expected, press the "Reset" button to restart the process and ensure that the LED blinks every 8.8 seconds.

Figure 5 Battery installation diagram

Pairing with a gateway/console

Compatible Gateways/Consoles for WS90

You need to pair this device with the Ecowitt Wi-Fi Gateway or display consoles in order to view data on your Ecowitt app and receive email alerts on our weather server. Compatible models are listed in the table below.

Table 3:

Console Model Name	Picture	Whether the data could Upload to Internet	Whether the data Could Display on the Gateway/ Console
GW1100		√	✘
GW1200		√	✘
GW2000		√	✘
GW3000		√	✘
HP2550		√	√
HP2560		√	√
HP3500		√	√
WN1820/WN1821		√	✘
WN1900/WN1910		√	✘
WN1920/WN1980		√	✘
WS3800		√	√
WS3900/WS3910		√	√
WS6210		√	✘

• The WN1900/WN1910/WN1920/WN1980 can't display the light intensity and UV data(Uploading not affected).
• The WN1820/WN1821 only displays the outdoor temperature and humidity data(Uploading not affected).

Configure with Gateway/Console

For details in this part, please refer to the manual of the gateway/console.
If Wi-Fi gateway has been in operation, and you have never had a weather sensor setup before, the sensor and Wi-Fi gateway will pick its data automatically.

Replace the old weather sensor

If you want to use a new WS90 sensor to replace a old weather sensor (already configured on certain channel), please try the following:

1. Open the Sensor ID page on the Ecowitt app, and find your old sensor ID.
2. Power off the old sensor and power on the new sensor.
3. Click Re-register on the Sensor ID page.

Then the new sensor will be learned, and the old sensor will be erased.

View Online Data on Ecowitt APP

When the Wi-Fi configuration is done, you can view the live data of your weather sensor on the Ecowitt app.

Before you mount

Before mounting the outdoor sensor in a permanent location, you should test the sensor wireless connection in a temporary location, and make sure that the sensor has a good station to show the data on the app or console. At the same time, you can adroitly use the various functions and familiarize yourself with the performance of the device.

Final mount

Note for Southern Hemisphere Installation:

The solar panel is rounded and orientation-free, so there is no need to adjust it to face "SOUTH" for charging capability.

Before mount

Familiarize yourself with the WS90's bottom threaded cover by gently turning it left and right to understand how it screws on and off.

Extension cable(sold separately) introduction

• The WS90 has the extension cable to connect the waterproof adapt 12V.
• The extension cord can also power the entire sensor, not just melts the ice.
• If you are not using the external heater, you can store the heater cable inside the pole fixing thread. This helps keep the setup neat and tidy while preventing accidental damage.
  
  Figure 6

Pole Attachment

• You can attach a pole (not included) to a permanent structure and then mount the sensor onto it (refer to Figure 7 for guidance).
• The installation hole is designed to fit a pole with a diameter of 1.0 inch (pole not included).
  
  Figure 7 Sensor package mounting diagram
• Vertical Alignment
  Ensure the mounting tube for the sensor package is installed upright to maintain proper vertical alignment. Adjust the mounting pipe as needed to achieve this.
• Leveling the Anemometer
  Make sure the anemometer body is mounted level on the pipe. If it is not level, wind direction and speed readings may be inaccurate. Adjust the mounting assembly if necessary.

Correctly Align the WS90 Sensor

• If you are unsure about the correct direction, locate the arrow labeled "NORTH" on top of the sensor package's connector tube.
• Rotate the sensor until this arrow points due NORTH. You can verify the direction using a compass app on your phone.
• Once aligned, securely screw the bottom threaded cover in the NORTH direction, as shown in Figure 8:
  
  Figure 8

Final Steps

• Before tightening the bolts, double-check and correct the north orientation as the final installation step.
• Tighten the bolts securely, but avoid over-tightening. Ensure the sensor is firmly fixed to withstand strong winds and rain without moving.

Features

• Piezoelectric rain gauge;
• Ultrasonic anemometer (start wind speed 0.5m/s);
• Outdoor Temperature and Humidity;
• Solar light intensity and UV index;
• Waterproof IPX5;
• Heater and additional power supply;

Specifications

Table 4:

Note:

• The wind speed is detected by every 2s.
• The wind speed reading will be a real-time value (The latest sampling data will be reporting to the receiver).
• The wind gust reading will be the max wind speed in the past 28s.
• When the wind speed is lower than 5m/s, the dispersion of wind direction will increase.
• The primary power source for the sensor is the solar panel. When available solar power (light over recent period) is insufficient, the batteries will be used.

Calibration and Maintenance

About daily rain deviation

Figure 9 Daily rain deviation for WH40 and WS90

The daily rain deviation of WS90 is very small in the long run, but under certain conditions the deviation can be larger: as the rain drop size and wind speed can have different impacts on the sensor output which lead to this variance.

The WS90 product suffer from this imperfectness. If you are very demanding on rain data accuracy, we suggest you buy WH40 and use it together with WS90. If there is no precise requirement on data of each rain, then WS90 is just fine: After all the device works well after a longer run time.

How to calibrate WS90

Ensure WS90 has been paired with the gateway/console. Make sure your mobile device and the gateway/console are connected to the same Wi-Fi network.

A certain parameter Calibration

If you have data from a relatively accurate weather station. You can use the data to do the calibration. Use Indoor temperature as an illustration in the Figure 10.

1. Open the Ecowitt app. Click "..." on top right corner and choose "Calibration".
2. Calculate the offset of data from accurate weather station and ecowitt sensor.
3. Fill in the offset got from step 3, click Save.
   
   Figure 10

Rain Sensor Calibration

The WS90 is equipped with a haptic rain sensor, and the system provides a method for users to calibrate the accuracy of the rain sensor themselves. To perform a proper calibration, please follow these steps:

1. Prepare a Reference Device
   A reference device is needed to record rainfall values, and it is also crucial to have the ability to record rain rates. For this purpose, the WH40 rain sensor can be used as the reference device.
   
   Figure 11 Rainfall values recorded for WH40 and WS90
2. Understand Rain Gain Parameters
   There are five rain gain parameters that can be set: Piezo Rain1 to Rain5. It is recommended to leave Rain1 unchanged unless you can confirm that it consistently produces the same results, after which you can adjust it.
3. Record and Calculate Rainfall Data
   For example: Suppose we set the Rain4 gain to 6/7.5 = 0.8. For easier handling, you can temporarily set Rain2, Rain3, and Rain5 to 0.8 as well.
   Only when different rain rates are recorded should you divide the WS90 rainfall value by 0.8 to obtain a 1.0 rainfall value. Then, recalculate (reference value/WS90/0.8) and precisely fill in the corresponding rain gain settings.
   
   Figure 12 Set five rain gain parameters

By following these steps, you can more accurately calibrate the rain sensor of the WS90.

Wind Speed 0 Calibration

Wind speed needs to be re-zeroed after the firmware upgrade (establish the zero baseline)

Use a fan to test if the wind speed responds at all angles!

1. Perform calibration in a windless room. Cover the top and wind speed sensor area of the WS90 with a soft cloth.
   • Hold the CAL button for 3 seconds until the LED lights up for 5 seconds and starts flashing.
   • Wait until the LED turns off, indicating that the wind speed calibration is complete and reset to the zero baseline is done.
     
     Figure 13

Managing LED Flashing

For some, the LED flashing is disturbing.

• To stop the LED from flashing, press and release the CAL button three times shortly.
• To restart the LED light function, press the CAL button three times again.

Warranty

Figure 14

Note: Sensor damage, due to lack of grounding protection against lightning ESD discharge, is not covered by warranty.

We provide a 2-year limited warranty.

Care and Maintenance

When batteries of different brands or types are used together, or new and old batteries are used together, some batteries may be over-discharged due to a difference in voltage or capacity. This can result in venting, leakage, and rupture and may cause personal injury.

• Do not mix Alkaline, Lithium, standard, or rechargeable batteries.
• Always purchase the correct size and grade of battery most suitable for the intended use.
• Always replace the whole set of batteries at one time, taking care not to mix old and new ones, or batteries of different types.
• Clean the battery contacts and also those of the device prior to battery installation.
• Ensure the batteries are installed correctly with regard to polarity (+ and -).
• Remove batteries from products during periods of non-use. Battery leakage can cause corrosion and damage to this product.
• Remove used batteries promptly.
• For recycling and disposal of batteries, and to protect the environment, please check the internet or your local phone directory for local recycling centers and/or follow local government regulations.

The provided solar panel charges a supper capacitor on this WS90. In normal conditions (solar light intensity over 20klux and lasted longer than 4 hours), the supper capacitor peak voltage displayed on the battery tile from your dashboard should be above 3.5v and lower than 5.5v. If it is not overpassing 2.5v, please check the top part of your WS90, and make sure it is free from dust coverage. Use a brush to clean up the surface for higher solar charging efficiency.

Figure 15

Contact Us

After-sales Service

Order Issues:
If you encounter any missing or incorrect shipments of Ecowitt products purchased, please reach out to the respective platform's customer service from the store where you bought the product for assistance.

Usage Inquiries:
Our product is continuously changing and improving, particularly online services and associated applications. To download the latest manual, and additional help, and for any issues related to product usage feel free to contact our customer support team at support@ecowitt.com. We are committed to providing assistance and resolving any concerns you may have.

Stay in Touch

Ask questions, watch setup videos, and provide feedback on our social media outlets. Follow Ecowitt on Discord, YouTube, Facebook and Twitter.

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download ECOWITT WS90 Manual