Uzoli EM3390D Weather Station

1. Introduction

Thank you for choosing the Uzoli EM3390D weather station. The EM3390D weather station consists of a base station (receiver), an integrated sensor, and a power adapter. This manual provides step-by-step instructions for installation, operation, and settings. Please read it carefully and keep it for future reference.

Before installing the outdoor sensor at its final location, it is recommended to operate it for one week in a temporary, easily accessible location. During this time, you can try out all functions, ensure proper operation, and familiarize yourself with the weather station. You can also test the wireless range of the weather station.

If you encounter any difficulties while using the weather station or find that the product has quality issues, please take photos and contact us first. We will analyze the possible causes of the problems and provide solutions.

If the product does not meet your expectations and you wish to return it, please repackage the product and contact Amazon customer service to request a return. If you are unsure whether the product has a hardware defect, please do not label it as "damaged," as Amazon will simply dispose of it, leading to a significant waste of resources.

2. Functional Overview

• DCF Radio Clock
• Perpetual Calendar up to 2099
• Weekday display available in 8 languages: German, French, Spanish, Italian, Dutch, Danish, Russian, and English
• 2 Alarms with Snooze Function
• Display of Temperature, Humidity, Wind Speed, and Rainfall
• Alarm for Temperature, Humidity, Wind Speed, and Rainfall
• Display of Feels Like Temperature, Dew Point, Heat Index, Windchill Index
• Barometric Pressure and Weather Forecast
• 4 Brightness Levels for Backlight (LV3 to LV1 and then off)
• USB Charging Port for External Devices

3. Warnings and Precautions

Warning: Any metal object, including the mounting pole of your weather station, can cause a lightning strike. Never install the weather station during a storm; do so on a clear and dry day.

Warning: Installing your weather station in an elevated location can lead to injury or death. Safety first. Ensure your setup and preparation are safe and do not take any risks.

4. Power Supply for Base Station and Sensor

The EM3390D weather station includes a base station (receiver), an integrated outdoor sensor, and mounting accessories.

4.1 Package Contents

4.2 Weather Station Display Layout

[Image of Weather Station Display with labels A1-A16 and B1-B5]

Part A - LCD Display Elements

• A1: Wind Direction Indicator
• A2: Outdoor Temperature
• A3: Outdoor Humidity
• A4: Channel Indicator for Integrated Sensor and Thermo-Hygrometer (1/2/3 - ignore if not included)
• A5: Weather Forecast
• A6: Feels Like Temperature
• A7: Today's (0:00-23:59) High/Low for Outdoor Temperature
• A8: Time
• A9: Wind Speed
• A10: Indoor Temperature
• A11: Indoor Humidity
• A12: Wind Direction or Highest Wind Speed in the Last 1 Hour
• A13: Rainfall Amount
• A14: Barometric Pressure
• A15: Calendar
• A16: Day of the Week

Part B - Housing

• B1: Hanging Hole
• B2: Battery Compartment
• B3: USB Charging Port
• B4: Power Input Port
• B5: Table Stand

4.3 Integrated Sensor Component Description

[Image of Integrated Sensor with labels D1-D17]

• D1: Solar Panel
• D2: Rain Gauge (Rain Collector)
• D3: Anemometer (Wind Cups)
• D4: Level Indicator
• D5: Thermo-Hygrometer with Radiation Shield
• D6: Wind Vane
• D7: RST Button
• D8: LED Indicator
• D9: PUSHER Button for Immediate Signal Transmission
• D10: Battery Compartment
• D11: Mounting Pole
• D12: Mounting Base
• D13: Round Head Screw and Washer for attaching the mounting pole
• D14: Drainage Holes for Rain Gauge
• D15: North Direction Marking
• D16: Direction Indicator for Rain Gauge
• D17: Large Screw for fastening the mounting pole and mounting base

4.4 Preparation for Installation

1) Auxiliary Tools (not included, please prepare as needed):

• ① Phillips screwdriver and wrench for assembly
• ② New batteries
• (Two) AA alkaline or lithium batteries for the base station
• (Three) AA alkaline or lithium batteries for the integrated sensor

2) Preparations:

• ① Take the base station and sensor out of the packaging and place them together on a table or bench that is easily accessible.
• ② Place the batteries and screwdriver within reach of the installation location.
• ③ After inserting the batteries, keep the sensor and base station within 0.15 to 0.3 meters (approx. 0.5 to 1 ft) of each other for at least 15 minutes to allow them to connect repeatedly.

4.5 Power Supply for the Sensor

Note: The outdoor sensor must be powered and updated by inserting the corresponding batteries before turning on the base station. Otherwise, a timeout will occur during the sensor search. Always turn on the base station last.

Insert Batteries into the Sensor:

1. Locate the battery compartment cover on the underside of the sensor.
2. Open the battery compartment cover.
3. Insert 3 AA batteries into the battery compartment. We recommend using lithium batteries (NOT rechargeable Li-ion batteries! As the solar panel does not charge the batteries but only maintains the voltage of the outdoor sensor), which typically last longer than 1 year and often have a significantly wider operating temperature range.
4. Replace the battery compartment cover to close the battery compartment.

Note: Do not insert the batteries incorrectly, as this can permanently damage the outdoor sensor. The solar panel does not charge the batteries, so rechargeable batteries are not needed or recommended.

Some batteries may not function properly at outdoor temperatures below -20°C (-4°F). Therefore, use cold-resistant batteries for the sensor.

Note: The LED indicator in the sensor's battery compartment blinks once every 10 seconds. Each blink indicates the sensor is transmitting data.

Note: If the sensor does not turn on after inserting the batteries (LED does not blink red), briefly press the RST button in the sensor's battery compartment. If the base station does not display outdoor data after subsequent installation (no outdoor sensor signal received), you can briefly press the PUSHER button in the sensor's battery compartment to manually transmit the outdoor signal to the base station.

4.6 Power Supply for the Base Station

Note: To reduce battery consumption, it is recommended to use the supplied power adapter.

Connect the base station to the supplied power adapter first. Then insert batteries into the base station.

1. Remove the battery compartment cover on the back of the display.
2. Insert 2 AA batteries into the back of the base station. The display will beep once, and all LCD segments will light up for a few seconds to ensure all segments are functioning correctly.
3. Finally, replace the battery compartment cover, unfold the table stand, and place the base station upright.

Note: The power adapter must be oriented correctly in a vertical or floor-mounted position. The plug contacts are not designed to hold the plug in place when plugged into a ceiling, under-table, or cabinet outlet.

Note: The battery serves as a backup power source for the base station, allowing settings to be saved and the base station to operate smoothly when the adapter is unplugged.

4.7 Connecting the Base Station to the Outdoor Sensor

Once the base station is powered on, it automatically scans for nearby outdoor sensors.

In the sensor search mode, the [signal icon] symbol will blink continuously. When the outdoor sensor is successfully connected, the measured values (outdoor temperature, outdoor humidity, barometric pressure, wind speed, wind direction, rainfall amount, feels like temperature) will be displayed on the base station, and the [signal icon] symbol will be displayed permanently.

If outdoor data is not displayed, briefly press the PUSHER button in the sensor's battery compartment to manually transmit the outdoor signal to the base station.

Note: Ensure the weather station's outdoor sensor is at least 3m (10ft) away from the console and within 30m (100ft) of the console. If the weather station is too close or too far, it may not receive a proper signal.

Note: Do not press any buttons until the sensor has reported on the display, otherwise the base station will terminate the connection with the outdoor sensor.

Note: The weather station features an automatic calibration radio clock (RCC function). After power-on, the weather station searches for the outdoor sensor for 3 minutes or until the channel is successfully searched. Once the outdoor signal search is complete, the weather station automatically switches to RCC mode.

If you live more than 1500 kilometers from the German DCF signal tower, please stop the DCF signal search by pressing and holding the [RCC button] for 3 seconds, and then set the time manually. In Section 5.1 (Basic Settings), you will find information on permanently disabling the RCC function and manually setting the time.

5. Operation and Setting of the Base Station

5.1 Basic Settings

Press and hold the [*] button for 3 seconds to enter the time setting mode.

The setting elements blink at 1Hz. Briefly press the [*] button to select the setting item. The sequence is as follows:

Buzzer (ON/OFF) → Temperature Unit (°C / °F) → Barometric Pressure Unit (hpa / inHg) → Wind Speed Unit (km/h / mph) → Wind Direction Angle or Wind Direction Display Selection → Rainfall Unit (mm / inch) → RCC Function → Time Zone (-02/-01/00/01/02) → (12 / 24) Hour Format → Hour → Minute → Date Format (Month-Day / Day-Month) → Year → Month → Day → Weekday Display Language → Weather Forecast (Reference Value)

If the weather station is in the same time zone as Germany, set the time zone to 00. If it runs one hour slower than German time, set the time zone to -01. If it runs one hour faster than German time, set the time zone to 01. If it runs 2 hours slower, set to -02; if 2 hours faster, set to 02.

Outside the 1500 km diameter range of the German DCF signal tower, the device receives poor radio clock signals. Therefore, it is recommended to set the RCC setting to OFF.

After the initial power-on, you should enter a reference value (5 weather models to choose from) for the weather forecast based on the local weather, and the weather station will calibrate itself to this reference value. Weather forecasts are calculated based on barometric pressure changes and can be up to 75% accurate one week after the weather station is turned on.

Weekday Display Language:

• GER → Deutsch
• FRE → Français
• SPA → Español
• ITA → Italiano
• DUT → Nederlands
• DAN → Dansk
• RUS → Русский
• ENG → English

Briefly press the [↑] or [↓] button to adjust the value. Press and hold the [↑] or [↓] button for 3 seconds to increase/decrease the value rapidly. Briefly press the [*] button to confirm the setting and proceed to the next item.

Touch the [*/z²] button once during or after setting to exit the manual setting mode at any time.

If no operation is performed within 20 seconds, the device will save the current setting state and automatically exit the setting mode.

5.2 Wireless Sensor Connection

Note: The weather station can connect up to 1 integrated sensor and 3 different thermo-hygrometers (temperature and humidity sensors). However, please note that the scope of delivery for the EM3390D weather station includes only one integrated sensor. In this section, please focus only on the information regarding the integrated sensor.

The weather station automatically searches for all wireless sensors within 3 minutes after power-on and registers their sensor IDs. Each sensor generates a random ID upon power-on for differentiation. In normal display mode, briefly press the [CH] button to switch between sensor data and IDs of different channels.

In normal display mode, press and hold the [C] button for 3 seconds to enter channel switching mode (the "C" symbol will appear on the display), and every 5 seconds, the temperature and humidity data of a group of outdoor channels will be displayed. However, please ignore this function and turn it off promptly if accidentally activated.

If you find that "- - . -" is displayed for the outdoor channel, please first check if the integrated sensor's channel data is displayed (only the [+] symbol represents the integrated sensor). If not, briefly press the [CH] button to switch to the correct channel for the integrated sensor.

If you are sure that the current base station has switched to the channel for the integrated sensor, but no data is displayed, please manually activate the signal search by briefly pressing the [CH] button on the base station and then pressing and holding the [*] button for 3 seconds. Then, press the PUSHER button in the sensor's battery compartment to manually send the signal to the base station. Normally, the signal connection will be restored within 3 minutes. If the connection fails, please try again several times.

5.3 RCC Function (DCF Radio Clock Signal Reception)

The weather station automatically switches to DCF signal reception mode after a maximum of 3 minutes upon power-on and successful outdoor sensor signal search. If the DCF signal search is interrupted and you need to receive the DCF signal manually, you can also press and hold the [RCC button] for 3 seconds to manually enter the DCF signal reception mode. The weather station will search for the DCF signal automatically for 7 minutes, the RCC symbol [radio tower icon] will blink, and the backlight will turn off automatically.

The DCF signal search only occurs if the RCC function is set to ON. Please note that during DCF signal reception mode, the backlight will automatically turn off, and all button functions except the [RCC button] and [*/z²] buttons will be temporarily deactivated. After the radio clock time signal reception is completed, the backlight will automatically turn on, and the button functions will be reactivated.

The DCF signal reception takes approximately 7 minutes. The [blinking radio tower icon] symbol will blink when the base station successfully receives the valid DCF signal, and after 7 minutes of signal reception, the radio tower symbol [solid radio tower icon] will be displayed permanently.

• To forcibly terminate the DCF signal search, press and hold the [RCC button] for 3 seconds.

Every day at 1:00/2:00/3:00, the radio clock automatically performs a synchronization process with the DCF signal to compensate for any deviations from the exact time. If this synchronization attempt fails (the [radio tower icon] symbol disappears from the display), the system will automatically attempt another synchronization at the next full hour. This process will repeat automatically up to a total of 5 times.

The "DST" symbol will be displayed when the base station receives the time signal from daylight saving time (this symbol disappears during standard time).

Note: It is strongly recommended to keep the weather station at least 2.5 meters away from all sources of interference such as televisions, computer monitors, etc.

In rooms with concrete walls (e.g., in basements) and in offices, radio reception is weaker. In such extreme circumstances, place the weather station near a window.

5.4 Alarm Settings

In normal display mode, press and hold the [ALARM button] for 3 seconds to enter the alarm time setting mode.

The setting elements blink at 1Hz. Briefly press the [ALARM button] to select the setting item. The sequence is as follows (first Alarm 1, then Alarm 2):

Hour → Minute → Alarm Repetition (M-F/M-S/ S-S) → Snooze Time (05-60 adjustable / OFF)

Snooze time can be set from 5 to 60 minutes. Alternatively, you can permanently disable the snooze mode by setting the snooze time to OFF.

There are 3 alarm repetition options:

• M-F: Monday to Friday
• S-S: Saturday to Sunday
• M-S: Monday to Sunday

If alarm repetition is set to M-F, the alarm function will be active from Monday to Friday, and "M-F" will appear under the alarm symbol. If alarm repetition is set to S-S, the alarm function will be active on Saturday and Sunday, and "S-S" will appear under the alarm symbol. If alarm repetition is set to M-S, the alarm function will be active for the entire week, and "M-F" and "S-S" will appear simultaneously under the alarm symbol.

When the setting value blinks at 1Hz, briefly press the [↑] button to add 1 to the value. Press and hold the [↑] button to add the value in large increments. When the setting value blinks at 1Hz, briefly press the [↓] button to decrease the value by 1. Press and hold the [↓] button to decrease the value in large increments.

Touch the [*/z²] button once during or after setting to exit the manual setting mode at any time.

If no operation is performed within 20 seconds, the device will save the current setting state and automatically exit the setting mode.

5.5 Turning Alarms On/Off

In normal display mode, briefly press the [ALARM button] to switch between the display of alarm times for Alarm 1 and Alarm 2. In Alarm 1/2 display mode, the alarm can be turned on or off by pressing the [*] button. When Alarm 1 or 2 is turned on, the corresponding symbol [bell icon] or [silent bell icon] will appear, and Alarm 1 or 2 will be activated. The alarm repetition symbol "M-F" and "S-S" will also be displayed.

5.6 Deactivating the Alarm

When the alarm sounds, press any button except the [*/z²] button, or press and hold the [*/z²] button for more than 2 seconds, or do nothing for 2 minutes to deactivate the alarm. When the alarm sounds, the volume of the gradually increasing alarm tone (Crescendo, duration: 2 minutes) will change four times. If the alarm is deactivated, it will repeat automatically after 24 hours according to the setting.

5.7 Snooze Function

When the alarm sounds, briefly touch the [SNOOZE button] once to interrupt the alarm signal and activate the snooze mode; the snooze symbol [zzz icon] will blink. After the set snooze time has elapsed, the alarm will sound again.

In snooze mode, press any button other than the [SNOOZE button] or press and hold the [SNOOZE button] for more than 2 seconds, or do nothing for 1 minute to exit snooze mode.

If the snooze function is deactivated, touching the [SNOOZE button] will not activate snooze mode.

5.8 MAX / MIN Records for Temperature and Humidity

In normal display mode, the current indoor/outdoor temperature and humidity, the "Feels Like" temperature, and today's high/low temperature (TODAY TEMP) are displayed.

There are also trends for indoor/outdoor temperature and humidity:

• [Upward arrow icon]: Temperature/Humidity is rising.
• [Downward arrow icon]: Temperature/Humidity is falling.
• No display: Temperature/Humidity remains unchanged.

Briefly pressing the [TEMP/HUMI button] will sequentially display the highest temperature (TEMP HIGH), lowest temperature (TEMP LOW), highest humidity (HUMI HIGH), lowest humidity (HUMI LOW), dew point (DEW POINT), heat index (HEAT IND), and windchill index (CHILL IND).

In this history display mode, you can press and hold the [*] button for 3 seconds to clear the historical record of temperature and humidity. All stored record values will then be reset to the currently measured values.

Touch the [*/z²] button once during or after setting to exit the manual history display mode at any time. If no operation is performed within 20 seconds, the device will automatically exit the history display mode.

5.9 Wind Speed and History Records

In normal display mode, the average wind speed over the last 30 seconds (WIND SPEED) is displayed.

In normal display mode, press and hold the [WIND button] for 3 seconds to switch to the display of wind direction (WIND DIRECTION) or the highest wind speed in the last 1 hour (TOP SPEED 1 HR).

Briefly pressing the [WIND button] will sequentially display the highest wind speed for the last 1 hour (1 HOUR) / 24 hours (24 HOURS) / 7 days (7 DAYS), and the highest monthly (MONTH) / yearly (YEAR) wind speed. (Please note that the highest monthly and yearly wind speed refer to calendar months and calendar years, e.g., January 1st to January 31st, and January 1st to December 31st).

In this history display mode, you can press and hold the [*] button for 3 seconds to clear the historical record of wind speed. All stored record values will then be reset to the currently measured values.

Touch the [*/z²] button once during or after setting to exit the manual display mode at any time. If no operation is performed within 20 seconds, the device will automatically exit the display mode.

5.10 Rainfall Amount and History Records

In normal display mode, press and hold the [RAIN button] for 3 seconds to switch to the display of rainfall amount (NOW / 1 HOUR / 24 HOURS / DAY / 7 DAYS / MONTH / YEAR / TOTAL) or rainfall rate (RATE, average rainfall in the last 12 hours).

Briefly pressing the [RAIN button] allows you to display the rainfall amount for the last 30 minutes (NOW) / 1 hour (1 HOUR) / 24 hours (24 HOURS) / 7 days (7 DAYS), and the daily (DAY) / monthly (MONTH) / yearly (YEAR) and total rainfall amount (TOTAL) as needed. (Please note that the daily, monthly, and yearly rainfall amounts mentioned here refer to calendar days, calendar months, and calendar years, e.g., 0:00 to 23:59, January 1st to January 31st, and January 1st to December 31st).

In this history display mode, you can press and hold the [*] button for 3 seconds to clear the historical record of rainfall amount. All stored record values will then be reset to zero.

Touch the [*/z²] button once during or after setting to exit the manual display mode at any time. If no operation is performed within 20 seconds, the device will automatically exit the display mode. If rainfall (and not rainfall rate) was displayed before exiting the history display mode, the last displayed rainfall type will also be displayed after returning to normal display mode from the history display mode.

5.11 Alarm Limit Display and Setting

In normal display mode, briefly press the [▲] button to enter the alarm limit display mode.

In the display mode, the alarm value blinks at 1Hz. Briefly press the [▲] button again to switch to the next alarm value, or briefly press the [*] button to turn the alarm on/off (ON/OFF). The sequence is as follows:

• Upper alarm limit for outdoor temperature (OUT, HI ALERT) →
• Lower alarm limit for outdoor temperature (OUT, LO ALERT) →
• Upper alarm limit for outdoor humidity (OUT, HI ALERT) →
• Lower alarm limit for outdoor humidity (OUT, LO ALERT) →
• Upper alarm limit for indoor temperature (IN, HI ALERT) →
• Lower alarm limit for indoor temperature (IN, LO ALERT) →
• Upper alarm limit for indoor humidity (IN, HI ALERT) →
• Lower alarm limit for indoor humidity (IN, LO ALERT) →
• Upper alarm limit for wind speed (WIND SPEED, HI ALERT) →
• Upper alarm limit for rainfall amount (RAIN, 24 HOURS, HI ALERT) →
• Upper alarm limit for rainfall rate (RATE, HI ALERT)

In normal display mode, press and hold the [▲] button for 3 seconds to enter the alarm limit setting mode. In setting mode, the alarm value blinks at 1Hz. Briefly press the [▲] button again to switch to the next alarm value. The setting sequence is the same as the display sequence above. The alarm limit can be changed using the [↑] and [↓] buttons.

In setting mode, the alarm can also be turned on/off by briefly pressing the [*] button.

Touch the [*/z²] button once during or after setting to exit the manual setting mode at any time. If no operation is performed within 20 seconds, the device will save the current setting state and automatically exit the setting mode.

When alarms are activated and the measurement exceeds the set threshold, the alarm will sound 5 times per minute, and the corresponding symbol will blink on the display. In this alarm mode, press any button to stop the alarm sound, but the alarm symbol will continue to blink. You can permanently turn off the alarm by going to the alarm display/setting mode.

5.12 Weather Forecast

After initial power-on, you should enter a reference value (5 weather models to choose from) for the weather forecast based on the local weather, and the weather station will calibrate itself to this reference value. Weather forecasts are calculated based on barometric pressure changes and can be up to 75% accurate one week after the weather station is turned on.

The weather station calculates a weather forecast for the next 12 hours based on barometric pressure changes. Naturally, this forecast cannot be compared to professional weather services supported by satellites and high-performance computers. This forecast provides only an approximate indication of the current weather development in a small local area. Please consider the weather forecast from your local weather service and your weather station's forecast simultaneously. In case of discrepancies between your device's readings and the local weather forecast service, please consider the latter's information as authoritative.

The weather station displays the following 10 weather symbols:

• Sunny [Sunny icon]
• Cloudy [Cloudy icon]
• Partly Cloudy [Partly Cloudy icon]
• Rain [Rain icon]
• Thunderstorm [Thunderstorm icon]
• Snow [Snow icon]
• Windy [Windy icon]
• Stormy [Stormy icon]
• Snowstorm [Snowstorm icon]

Note:

• If "Rain" or "Thunderstorm" is predicted and the outdoor temperature drops below -4°C (+25°F), the forecast will change to "Snow".
• If "Sunny", "Cloudy", or "Partly Cloudy" is predicted and the wind speed exceeds 50 km/h, the forecast will change to "Windy".
• If "Rain" or "Thunderstorm" is predicted and the wind speed exceeds 50 km/h, the forecast will change to "Stormy".
• If "Rain" or "Thunderstorm" is predicted, and the outdoor temperature subsequently drops below -4°C (+25°F) and the wind speed exceeds 50 km/h, the forecast will change to "Snowstorm".

It takes 7 to 10 days for the weather station to complete barometric pressure calibration. After barometric pressure calibration, the weather forecast stabilizes with an accuracy rate of 70% to 75%.

The weather station can display the trend of barometric pressure:

• [Upward arrow icon]: Barometric pressure is rising.
• [Horizontal line icon]: Barometric pressure remains constant.
• [Downward arrow icon]: Barometric pressure is falling.

5.13 Backlight

When the base station is powered by batteries only, touch the [SNOOZE/LIGHT button] to illuminate the display for 15 seconds.

When the base station is powered by the adapter, the backlight can remain on continuously. You can press the [LIGHT button] to change the backlight brightness levels:

LV3 → LV2 → LV1 → OFF

If the backlight brightness is not set to the highest level, pressing the [SNOOZE/LIGHT button] will illuminate the display at the highest brightness level for 15 seconds.

During DCF signal reception mode, the backlight will automatically turn off. You can manually turn on the backlight using the [SNOOZE/LIGHT button].

5.14 Low Battery Status

When the [low battery icon] symbol appears on the display, the batteries in the base station need to be replaced as soon as possible.

6. Mounting the Integrated Sensors

6.1 Outdoor Sensor Check

The following steps will check the proper operation of all small sensors in the outdoor sensor before installing the outdoor sensor in a fixed location.

1. Check the Rain Gauge: Tilt the integrated outdoor sensor back and forth several times. You should hear a "ticking" sound in the rain gauge. Ensure that the rain display on the base station does not show 0.00. Each "tick" represents 0.1 inch of rainfall.
2. Check the Anemometer: Manually rotate the anemometer (wind cups) or use a fan at a constant speed. Ensure that the wind speed display does not show 0.0.
3. Check Indoor/Outdoor Thermometer Operation: Ensure that the indoor and outdoor temperatures are nearly the same when the base station and outdoor sensor are in the same location (approx. 1.5 to 3m / 5 to 10ft apart). The temperature difference should be within 2°C / 4°F (accuracy is ± 1°C / 2°F). Allow both thermometers about 30 minutes to stabilize.
4. Check Indoor/Outdoor Hygrometer Operation: Ensure that the indoor and outdoor humidity levels are nearly the same when the base station and outdoor sensor are in the same location (approx. 1.5 to 3m / 5 to 10ft apart). The humidity difference should be within 10% (accuracy is ± 5%). Allow both hygrometers about 30 minutes to stabilize.

6.2 Preparation for Mounting

Temporary Operation: Before installing your weather station at its final location, it is recommended to operate the weather station for one week in a temporary, easily accessible location. During this time, you can try out all functions, ensure proper operation, and familiarize yourself with the weather station. You can also test the wireless range of the weather station.

6.3 Site Assessment

Perform a site assessment before installing the weather station. Consider the following points:

1. The rain gauge must be cleaned once a year, and batteries should generally be replaced at least every year. Therefore, ensure easy access to the weather station.
2. Avoid radiated heat transfer from buildings and structures. Generally, the outdoor sensor should be installed at a distance of at least 1.5m / 5ft from buildings, structures, the ground, or the rooftop.
3. Avoid obstacles for wind and precipitation. As a rule of thumb, the outdoor sensor should be installed at least four times the height of the highest obstacle. If a building is 6m high, the optimal mounting height is 4x6m = 24m / 4x20 = 80ft. You may use your own judgment: if the weather station is installed next to a tall building, wind and precipitation will not be displayed accurately.
4. Wireless Range. The wireless connection between the receiver and the outdoor sensor in open terrain can reach a distance of up to 100m / 330ft, provided there are no interfering obstacles such as buildings, trees, vehicles, power lines, or the like. However, radio signals do not penetrate metal buildings. Typically, due to building obstructions, walls, and interference, a range of only about 30m / 100ft can be achieved.
5. Radio interference such as from radios, televisions, and especially PCs can completely interrupt wireless communication in the worst case. Please consider this when selecting mounting locations for the base station and the outdoor sensor.

6.4 Best Practices for Wireless Communication

Wireless communication is susceptible to interference, distance, walls, and metal obstacles. We recommend the following points for interference-free wireless communication.

1. Electromagnetic Interference (EMI): Keep the base station several meters away from computer monitors and televisions.
2. Radio Frequency Interference (RFI): If you have other 433 MHz devices and the outdoor sensor's communication is frequently interrupted, try turning off these other devices for troubleshooting. You may need to reposition the sensor or receiver to avoid interrupted communication.
3. Direct Line of Sight: This device is designed for a line of sight of 100m / 330ft (no interference, barriers, or walls). In most real-world installations, including passage through barriers or walls, a maximum of 30m / 100ft is typically achieved.
4. Shielding by Metal: Radio frequencies cannot be transmitted through metal obstacles such as aluminum wall cladding. If you have metal cladding, align the outdoor sensor and base station through a window to achieve a direct line of sight.

The following is a table of reception losses depending on the material to be penetrated. Each "wall" or obstacle reduces the transmission range by the factor indicated below.

6.5 Final Mounting of the Outdoor Sensor

1. Please first ensure that the sensor is installed in an open area with a 15m (approx. 50ft) clearance in all directions.
2. Additionally, the sensor should be mounted on a stable platform (or stand) at a height of at least 1.5m (approx. 5ft) above the ground.
3. Ensure that the wireless sensor is installed within 100 meters (approx. 330ft, without obstacles) of the base station. Depending on the thickness of the obstacle between the wireless sensor and the base station, the distance should be as short as possible (the distance is reduced after the signal penetrates the obstacle), otherwise data transmission may be disturbed.

[Diagram showing North orientation for sensor placement]

4) On the top of the sensor, there is an embossed marking "N", which points to North (a check with a compass is required, and the "N" of the embossed marking corresponds to the "N" of the compass). If you are in the Northern Hemisphere, when installing the sensor, ensure that the solar panel faces South (i.e., the "N-marking" is aligned to the North), otherwise the wind direction will be displayed incorrectly.

5) Fasten the mounting pole to the mounting base using the large screws (you can adjust the orientation of the mounting base as needed). Tighten the large screw firmly.

6) Then, slide the rectangular washer into the slot of the pole insert on the underside of the sensor body. Connect and fasten the sensor body to the mounting pole using the rectangular washer and the two round head screws.

7) The fastening screws on the wind vane and anemometer (wind cups) should also be tightened.

8) You can attach the mounting base to a wooden surface using self-tapping screws or to stone or concrete using the optional expansion plugs. Alternatively, you can use the rear mounting plate, mounting nuts, and round head screws to attach the mounting plate together with the mounting base to an optional pole. There are a total of 4 mounting options, as shown in the following illustration.

[Diagrams showing 4 mounting options]

6.6 Maintenance

Note: When mounting the sensor, use the top spirit level (level indicator) to ensure the sensor is horizontal, as this affects the accuracy of rainfall measurement.

Please note that the rain gauge on the integrated sensor must be cleaned regularly (recommended cleaning frequency is every 1-3 months, depending on rainfall frequency):

1. Remove the rain collector (rotate the rain collector in the depicted rotational direction).
2. Carefully remove any dirt or insects from the rain collector.
3. Remove dirt from the rain collector itself, especially from the drain of the collector.
4. Clear the drainage openings.
5. Reinstall the rain collector.
6. Caution: Do not lubricate the rain gauge.

[Diagram showing rain gauge cleaning steps]

7. Technical Data

7.1 Wireless Transmission of Outdoor Sensor to Base Station

Transmission distance (without obstacles): 100m / 330ft

Frequency: 433 MHz

The outdoor sensor transmits current signals every: 10 seconds

7.2 Measurement Specifications

The following table contains specifications for the measured parameters.