Table of Contents
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Temperature Sensor
Model: WN1821&WN1820
Contents
1. Feature ......................................................... 3
2. Display Console .......................................... 5
3. Screen Display .............................................8
4. Key Function ............................................. 10
5. Modes ........................................................ 14
5.1 Normal Mode ...................................... 14
5.2 Alarm Clock Hour-Setting Mode ........ 15
5.4 MAC Address Display Mode .............. 16
5.5 Setting Mode ....................................... 16
6. Display Console ........................................ 18
the screen ................................................... 18
6.2 CO₂ Concentration .............................. 19
6.3 CO₂ Calibration ................................... 20
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Summary of Contents for ECOWITT WN1821
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Page 1: Table Of Contents
Temperature Sensor Model: WN1821&WN1820 Contents 1. Feature ............3 2. Display Console .......... 5 3. Screen Display ..........8 4. Key Function ..........10 5. Modes ............14 5.1 Normal Mode ........14 5.2 Alarm Clock Hour-Setting Mode ..15 5.3 Alarm Clock Minute-Setting Mode ..15 5.4 MAC Address Display Mode .... - Page 2 6.5 Host Battery Low Voltage Icon ...22 7. Live Internet Publishing ......23 7.1 Wi-Fi Configuration ......24 7.1.1 Wi-Fi Configuration via Web Page24 7.1.2 Configure Device on Ecowitt APP27 8. Backlight ............29 9. Alarm Clock ..........30 9.1 Alarm Clock Function ......30 9.2 Snooze Function ........
- Page 3 ＊ Please scan the QR code to read English manual and keep it for future reference ＊ Bitte scannen Sie den QR-Code zudeutsche Anleitung lesen und aufbewahren füZukunftsbezug ＊Si prega di scansionare il codice QR perleggi il manuale italiano e conservalo perReferenza futura Instruction manuals https://s.ecowitt.com/YKMQNM...
- Page 4 Help Our product is continuously changing and impro- ving, particularly online services and associated applications. To download the latest manual and additional help, please contact our technical sup- port team: support@ecowitt.com support.eu@ecowitt.net (EU/UK)
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Page 5: Feature
1. Feature 1. WN1821 has built-in Photoacoustic NDIR CO₂ Sensor for detecting CO₂ concentration, while WN1820 can work with WH45 Transmissive NDIR CO₂ detection, or WH46 Photoacoustic NDIR CO₂ to activate CO₂ function. Both of display has built-in temperature and humidity, and air pressure. - Page 6 5. Maximum/minimum data logging. 6. Supports Wi-Fi configuration on web page, viewing more sensors' data, setting server, setting calibration parameters, setting Sensor ID. 7. With Wi-Fi function, supports for uploading data to the weather station server. 8. Automatic time zone and automatic network time acquisition.
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Page 7: Display Console
2. Display Console Figure 1 (1) Unfold the desk stand and place the console 5 to 10 feet away from the outdoor sensor. - Page 8 (2) Remove the battery door on the back of the console and insert 2 x AA good quality Alkaline or Lithium batteries per. (3) Wait several minutes for the remote sensors to synchronize with the display console. (4) In order to prevent the display console's own temperature rising from affecting the accurate reading of temperature and humidity, the temperature and humidity...
- Page 9 Figure 2...
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Page 10: Screen Display
3. Screen Display Figure 3 Time WH51 Soil moisture, WN34 soil/ liquid temperature sensor, WN35 leaf wetness sensor... - Page 11 Signal Icon WN31 Temperature (WN31 Need to Separately Purchase) Channel Number WN31 Humidity (WN31 Need to Separately Purchase) WN31 MAX & MIN Humidity (WN31 Need to Separately Purchase) WN31 MAX & MIN Temperature (WN31 Need to Separately Purchase) Power Status CO₂...
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Page 12: Key Function
4. Key Function The console has five keys for easy operation... - Page 13 【MODE】: (1) Press to switch between Normal Mode, Alarm Clock Hour-Setting Mode, Alarm Clock Minute-Setting Mode, MAC Address Display Mode. (2) Press and hold for two seconds to enter the Set Mode. 【+】: (1) While in Normal Mode, press this button to switch between date, CO₂, CO₂24hAVG, CO₂1hMAX, CO₂24hMAX and CO₂MAX.
- Page 14 (1) While in Normal Mode, press this button to switch between Indoor, WN34 CH1, WN34 CH2, WN34 CH3, WN34 CH4, WN34 CH5, WN34 CH6, WN34 CH7, WN34 CH8, WN35 CH1, WN35 CH2, WN35 CH3, WN35 CH4, WN35 CH5, WN35 CH6, WN35 CH7, WN35 CH8, WH51 CH1, WH51 CH2, WH51 CH3, WH51 CH4, WH51 CH5, WH51 CH6, WH51 CH7, WH51 CH8, ↻...
- Page 15 to switch WN31 area displaying content, the sequence is from WN31 CH1, WN31 CH2, WN31 CH3, WN31 CH4, WN31 CH5, WN31 CH6, WN31 CH7, WN31 CH8, ↻ . (2) While in single WN31 CH mode, long press this button 5 seconds to re-register the corresponding CH sensor.
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Page 16: Modes
+/TEMP: long press these 2 buttons at the same time over 2 seconds to trigger Soft-AP and the Wi-Fi icon will fast flash; you can use PC or phone to connect its hot spot. 5. Modes There are 5 modes ： Normal Mode, Setting Mode, Alarm Clock Hour-Setting Mode, Alarm Clock Minute-Setting Mode, MAC Address Display Mode. -
Page 17: Alarm Clock Hour-Setting Mode
into normal mode. 5.2 Alarm Clock Hour-Setting Mode 1. While in Alarm Clock Hour-Setting Mode, Adjust the hour by pressing the button + and - . 2. Power on/off the alarm clock by pressing the button TEMP . 5.3 Alarm Clock Minute-Setting Mode 1. -
Page 18: Mac Address Display Mode
5.4 MAC Address Display Mode Press the button MODE to enter the MAC Address Display Mode to check the mac address. 5.5 Setting Mode Press and hold the MODE button for two seconds to enter the Setting Mode. To proceed to the next setting, press (do not hold) the MODE button. - Page 19 from sounding when pressing any button. [MODE] Clear Press [+] or [-] to switch Max/Min OFF and ON. When set to ON, the minimum and maximum values reset every day at midnight (00:00). When set to OFF, the minimum and maximum values must be reset manually.
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Page 20: Display Console
up or down. [MODE] Temperature Press [+] or [-] to change Units of temperature units of measure Measure between °F and °C. [MODE] CO₂ Press [TEMP] to switch OFF Calibration and ON. 6. Display Console 6.1 List of sensors that can be displayed on the screen Item Number... -
Page 21: Co₂ Concentration
WN35 Leaf wetness sensor WN34 WN34S stainless-ste el probe therm ometer for soil WN34L wire probe thermome ter for water 6.2 CO₂ Concentration 1. If device detects the built-in CO₂ concentration sensor, it will automatically switch to display the real-time CO₂ concentration value when the product is powered up and detect the CO₂... -
Page 22: Co₂ Calibration
6.3 CO₂ Calibration In Normal Mode, hold the button Mode 2 seconds to enter into the Setting Mode, and press the button Mode until CO₂ calibration mode is presented. Put the console in outdoor air location, or at least with normal fresh outdoor air submerged. -
Page 23: Wi-Fi Icon
successful CO₂ calibration; when "NG" flashes to indicate failure of CO₂ calibration. 5. In the CO₂ calibration page, it will not return to the main page automatically. 6.4 Wi-Fi Icon Wi-Fi Icon State Fast Flash Soft-AP switched on after power up or key activation Solid OFF Device lost connection with the router... -
Page 24: Host Battery Low Voltage Icon
4 frames: -65 <= RSSI < 10 6.5 Host Battery Low Voltage Icon 1. The display will show the low voltage icon if no batteries are presented on console. 2. When the battery voltage of the device is less than or equal to 2.5V, the low voltage icon will be displayed. -
Page 25: Live Internet Publishing
The supported services are shown in the table below: Hosting Website Description Service Ecowitt Ecowitt is a new weather Weather server that can host a bunch of sensors that other services don’t support. Weather WeatherUn Weather Underground is a Underground deground. -
Page 26: Wi-Fi Configuration
Supports uploading to your Website customized website, if the website has the same protocol with Wunderground or Ecowitt 7.1 Wi-Fi Configuration 7.1.1 Wi-Fi Configuration via Web Page 1. Turn on Soft-AP The device will automatically turn on Soft-AP when powered on. If the product is... - Page 27 not configured Wi-Fi, the Soft-AP of this device will always be on and the Wi-Fi icon flashing indication. You can also press “+/TEMP” button at the same time for 2s to activate this Soft-AP broadcasting. 2. PC or mobile phone connect to this device's Soft-AP e.g.
- Page 28 Under “menu” - “device” page, you can add a new device with the Mac address directed to this device. 10. Install “ecowitt” app, log in and your weather station data will be populated...
- Page 29 “ecowitt” APP. The APP will walk you through the complete setup. Please make sure your phone has cellular network service turned off, “ecowitt”...
- Page 30 1. Install “ecowitt” app. Make sure you have the app with location and wifi service enabled. 2. Turn off your mobile phone “cellular network” data service during the setup process ( if it is a mobile phone running the ecowitt app).
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Page 31: Wi-Fi Configuration Via Web
“weather station” – “+ add a new weather station” to start the wifi provisioning process. 4. Follow the instruction from the app, and if there is still a problem, please send me a screen shot with the problem. 8. Backlight * When powered by batteries, the backlight will turn off after the product is powered on 15s. -
Page 32: Alarm Clock
the brightness will maintain for 15s and then automatically turn off. * When powered by DC power supply, short press LIGHT to adjust the backlight: High -> Medium -> Low -> Off. 9. Alarm Clock 9.1 Alarm Clock Function After the alarm is triggered, the alarm will continue to ring for 2 mins without any button operation, and the alarm will ring more and more rapidly during the 2 mins. -
Page 33: Trend Arrow Function
minutes later the alarm will sound again. * Press and hold any button for 2 seconds after entering snooze mode to exit snooze mode. 10. Trend Arrow Function * Only indoor temperature and humidity, WN31 WN34 temperature and humidity have the trend arrow function. * The algorithm is as follows : 3 hrs comparison which changes on every ½... -
Page 34: Rf Reception Function
* The RF reception function will always be on to receive data from multiple sensors at any time. With WSView Plus APP and Ecowitt APP, you will get more powerful data service functions. - Page 35 Outdoor temperature and WH65/ humidity, light UV, 69/67 wind speed and direction, rainfall Wind speed and direction, light UV WS68 Rainfall WH40 Ultrasonic wind speed and direction, UV light, WS80 outdoor temperature and humidity Lightning detection WH57 CO₂ , PM2.5, PM10, temperature and WH45 humidity...
- Page 36 PM2.5 WH41/ Water leaking detection WH55 WN31 thermometer and hygrometer WN31/ WH30 thermometer WN30/ WN36 pool thermometer WN36 Soil moisture WH51 thermometer WN34 Leaf wetness sensor WN35...
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Page 37: Storage Function
12. Storage Function * Once powered on, the device will save the changed settings after 3 mins, and the product will restore the previous setting items when re-powered. * If you change the setting parameters via its embedded web page, it will save them immediately and the settings will not be lost when powered off. -
Page 38: Cloud Functions
CO₂ calibration value after a successful calibration. 13. Cloud Functions * Only after Wi-Fi configuration can use the upload function. * Weather servers support below servers after successful Wi-Fi configuration: A. Ecowitt.net B. Wunderground C. Weathercloud... - Page 39 D. Weather Observations Website E. Custom server * Automatically get the network time every hour automatically. * If you have set up automatic firmware updates on the web page, every time a new firmware is available, the product goes into OTA and the "OTA"...
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Page 40: Specification
14. Specification Model:WN1821 Name : Weather Station (receiver) Dimensions : 110×104.5×27.5 (mm) Screen Size : 80.5×96 (mm) Weight : 160 (g) Material of Plastic Casing : ABS Material of Screen : VA-LCD Temperature Metering Range : -9.9°C to 60°C (14°F to 140°F) - Page 41 Metering Accuracy : ±2%RH Humidity Metering Resolution : 1%RH Barometric Pressure Metering range : 300 to 1100 hPa (8.85 to 32.5 inHg) Barometric Pressure Metering accuracy : ±1.5hpa (absolute pressure); ±2hpa (relative pressure) Barometric Pressure Metering resolution : 0.1 hPa (0.01 inHg) Photoacoustic NDIR CO₂...
- Page 42 NDIR CO₂ Metering accuracy : ±(50ppm + 5% of reading) when 400 to 2000 ppm Photoacoustic NDIR CO₂ Metering resolution : 1ppm Photoacoustic NDIR CO₂ Accuracy drift per year : ± (5ppm + 5% of reading) Reading Update Interval : About 1 minute Connection Frequency : 920/915/868/433MHz (depending...
- Page 43 Console Operating Temperature : -10°C to 50°C (14℉ to 122℉) Power Supply : 5V DC or 2×1.5V AA Battery (not included) Battery Life : 1 day Model:WN1820 Name : Weather Station (receiver) Dimensions : 110×104.5×27.5 (mm) Screen Size : 80.5×96 (mm) Weight : 158.3 (g) Material of...
- Page 44 Temperature Metering Resolution : 0.1°C (0.2℉) Humidity Metering Range : 1%RH to 99%RH Humidity Metering Accuracy : ±2%RH Humidity Metering Resolution : 1%RH Barometric Pressure Metering range : 300 to 1100 hPa (8.85 to 32.5 inHg) Barometric Pressure Metering accuracy : ±1.5hpa (absolute pressure);...
- Page 45 Metering resolution : 0.1 hPa (0.01 inHg) Reading Update Interval : About 1 minute Connection Frequency : 920/915/868/433MHz (depending on local regulations) RF Wireless Range : Over 100 meters (in open areas) WLAN : 802.11 b/g/n 2.4 GHz (802.11n, Max 150 Mbps) WLAN Range : Over 30 meters (in open areas) Console...
- Page 46 What types of NDIR sensors exist and how do they work? An introduction to the principles behind transmissive and photoacoustic NDIR sensing Characteristics of NDIR Sensors: NDIR sensing has become the prevalent technique for measuring CO₂ concentration. The technology exploits the characteristic property of CO₂...
- Page 47 the infrared wavelengths of interest to pass. These characteristics give the sensors their classification: Non-dispersive Infra-red. Transmissive NDIR: These NDIR sensors typically feature an IR emitter and an optical detector, such as a photodiode, at opposite ends of a specially designed optical cavity.
- Page 48 absorption at 4.2 µm wavelength without the use of dispersive optical elements. Absorption spectra of common trace gases (HITRAN2016 molecular spectroscopic database) Note that this reference value heavily depends on precise positioning of IR emitter and photodetector, as well as the emission properties of the IR source and the optical cavity.
- Page 49 on the measurement chamber can thus significantly falsify CO₂ readings. Furthermore, transmissive NDIR sensors generally require a minimal optical path length in the centimeter scale for enough IR absorption to occur to accurately measure lower CO₂ concentrations. Photoacoustic NDIR:...
- Page 50 In contrast to transmissive NDIR sensors, photoacoustic NDIR sensors detect the amount of energy that is absorbed by CO₂ molecules. When pulsing the infra-red emitter, CO₂ molecules absorb infra-red light periodically. This causes additional molecular vibration resulting in a pressure wave inside the measurement chamber.
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