Uzoli EM3403 Weather Station User Manual

I. Introduction

Thank you for choosing the Uzoli EM3403 weather station. The EM3403 weather station consists of a base station (receiver), a remote sensor and a power adapter with USB type C connector. The following manual contains step-by-step instructions for installation, operation and setting, please read it carefully and keep it.

Please leave the base station and the sensor in the same place for 48 hours after switching it on for the first time so that the temperature/ humidity sensor can calibrate itself and adapt to the local weather.

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

If the product does not meet your expectations and you want 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 fault, please do not mark it as "damaged" as Amazon will simply dispose of it, which results in a huge waste of resources.

II. Technical Data and Functions

• DCF radio clock
• Perpetual calendar until 2099
• Time display in 12/ 24 hour format
• Weekday display available in 7 languages: German, Italian, French, Spanish, Dutch, Danish and English
• 2 alarm clocks with snooze function
• Display of indoor/ outdoor temperature and humidity with trends
• Temperature display selectable in °C or °F
• Max/ Min display for temperature and humidity
• Outdoor temperature alarm and frost point alarm
• Display of air pressure with trends and histogram of historical pressure development
• Pressure display selectable in hPa/mb or inHg
• 5 levels of comfort for indoors
• 4 levels of mould risk for indoors
• Sunrise and sunset (select/ locate city)
• 6 weather forecast symbols: sunny, partly cloudy, cloudy, rainy, stormy, snowy
• Moon phases and tides
• 5 levels of brightness for backlight (LV4 to LV1 and then off)

Measuring Range:

1 Wireless Outdoor Sensor:

• Install using hanging holes or table stand
• RF transmission frequency is 433.92MHz
• 60m transmission range when without obstructions
• 1 base station is compatible with a maximum of 3 sensors, but only one is included in the order

Power Supply:

Note: The wireless outdoor sensor can operate at -40°C to +70°C. In winter, please select the cold-resistant battery according to the limit temperature of the wireless sensor:

• Alkaline zinc manganese dioxide battery can normally work at -20°C to +60°C.
• Polymer lithium-ion battery can normally work at -40°C to +70°C.

III. Appearance of the Weather Station

Part A - Positive LCD

The main display unit features a positive LCD screen showing various weather-related information. Key elements include:

• A1: Channel number and reception icon [Signal Icon]
• A2: Outdoor temperature
• A3: Weather forecast symbols (e.g., sunny, cloudy, rainy)
• A4: Outdoor temperature alarm indicator
• A5: Outdoor humidity
• A6: Time of sunrise
• A7: Selected city name
• A8: Time of sunset
• A9: Month and date
• A10: Weekday
• A11: Tide level indicator
• A12: Histogram of historical pressure development
• A13: Moon phase indicator
• A14: Air pressure
• A15: Current time
• A16: Indoor mould risk indicator
• A17: Indoor humidity
• A18: Indoor comfort level indicator
• A19: Indoor temperature

Part B - Function Keys and Connections

The base station has several buttons and connection ports:

• B1: [☀️/?] touch field (likely for alarm/snooze or backlight)
• B2: [CH] key (Channel selection)
• B3: [MODE] key (Mode selection)
• B4: [ALARM] key (Alarm settings)
• B5: [+] key (Increase value)
• B6: [-] key (Decrease value)
• B7: [RCC] key (Radio clock signal reception)
• B8: Power supply socket - type C
• B9: Hanging hole for wall mounting
• B10: Battery compartment for backup power
• B11: Table stand for positioning the base station

Part C - Wireless Remote Sensor

The wireless sensor transmits outdoor data to the base station:

• C1: LCD display of outdoor temperature
• C2: LCD display of outdoor humidity
• C3: LED signal light (indicates transmission status)
• C4: [°C/°F] selection button (temperature unit)
• C5: [TX] key for immediate signal transmission
• C6: Switch of channel 1/2/3 (CH1/2/3)
• C7: Battery compartment

IV. Installation Instructions

1. Install the Base Station

• Firstly, connect the base station to the power supply using the power adapter supplied.
• It is recommended to equip the base station with 2 AAA batteries together with the power adapter to ensure that the base station can save its settings and function properly even in the event of a power failure.

2. Install Outdoor Sensor

• Secondly, open the battery compartment of the outdoor sensor and set it as channel 1. Then place 2 AA batteries in the battery compartment. Make sure that all batteries are inserted according to the polarity indications on the back of the outdoor sensor. Close the battery compartment.
• After inserting the batteries into the outdoor sensor, all icons on the LCD display of the sensor light up briefly for 3 seconds and the sensor measures outdoor temperature and humidity. At the same time the LED signal light flickers once, the wireless sensor automatically transmits wireless signals.
• If the signal transmission is interrupted (the signal light of the sensor does not flash red), you can press the [TX] key (for immediate signal transmission) in the battery compartment of the outdoor sensor to send the RF signal to the base station manually. The signal transmission takes about 3 minutes and after completion the icon [Signal Received Icon] is displayed over the channel data in the area of "OUT".

Note:

• The base station can connect up to 3 sensors (but the order contains only ONE).
• The wireless sensor normally displayed by the base station is set to channel 1. If the wireless sensor is set to channel 2 or 3, you need to press the [CH] key to switch to channel 2 or 3, and then please observe whether the temperature and humidity are displayed in the data area of "OUT" on the base station. If so, the outdoor signal has been successfully received.

V. Default Setting

1. Default Setting

The base station switches on all segments of the LCD for 3 seconds after switching on the power supply. After the beep "BI", the unit switches to standard mode and starts measuring the indoor temperature and humidity and air pressure.

At the same time, the weather station starts receiving the RF signal from the outdoor sensor. If the signal transmission is interrupted, you can press the [TX] key (for immediate signal transmission) in the battery compartment of the outdoor sensor to send the RF signal to the base station manually. The signal transmission takes about 3 minutes and after completion the icon [Signal Received Icon] is displayed above the channel data on the base station.

After receiving the signal from the outdoor sensor, the base station displays the outdoor temperature and humidity.

Standard display when switching on:

1. Time and date: 00:00, 24-hour format, 1 January 2023
2. Standard unit for temperature: °C
3. Weather forecast: partly cloudy
4. Language: German
5. Time zone: 00
6. City: BER (Berlin)
7. AUTO RCC: ON
8. AUTO DST: ON
9. Standard unit for air pressure: hPa/mb
10. Alarm 1: 6:00 for M-F; Alarm 2: 8:00 for S-S; Default setting is OFF.

VI. Operating Instructions

1. Manual Time Setting

In normal display mode, press and hold the [☀️/?] key for 3 seconds to access the manual time setting. The setting item flashes at 1Hz. While pressing the [MODE] key briefly, select the setting content. The order is as follows:

Beeper (ON/OFF) → Temperature unit (°C/ °F) → Air pressure unit (hPa/ inHg) → RCC (ON/OFF) → DST (ON/ OFF) → Time zone (-02/-01/00/01/02) → (12/24)-hour format → Hours → Minutes → Year → Month → Day → Language → Air pressure (reference value) → Weather (reference value) → Exit

The year is set in the range 2000 to 2099 (default: 1 January 2023).

Display Language of the Day of the Week:

Display Language of the Month:

• When the setting value flashes at 1 Hz, press the [+] key briefly to add the value by 1, press and hold the [+] key to add the value rapidly.
• When the setting value flashes at 1 Hz, press the [-] key briefly to decrease the value by 1, press and hold the [-] key to decrease the value rapidly.
• Quickly touch the touch button [☀️/?] twice during or after setting to exit the manual setting mode.
• If no operation is performed within 20 seconds, the unit saves the current setting status and automatically exits the setting mode.
• 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 it to -02; if it runs 2 hours faster, set it to 02.
• Outside the 1500 km diameter range of the German DCF signal tower, the unit will receive poor radio clock signals, so it is recommended to set the setting item RCC to OFF.
• When the setting proceeds to the setting item DST, please select ON or OFF depending on whether daylight savings time is in effect in your city. The sunrise and sunset times are also determined according to daylight saving time.

2. Alarm Clock and Outdoor Temperature Alarm Settings

About setting reference value of air pressure and weather forecast:

After switching on for the first time, you need to enter a reference value 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 changes in air pressure and can be up to 75% accurate one week after switching on the weather station.

The initial air pressure value is supplied from the factory and is set to absolute pressure (ABS PRESSURE). The weather station displays the absolute pressure by default when it is first switched on (that's the pressure value measured by the weather station's built-in air pressure sensor). If you live in an area with relatively low altitude, you can rely on the absolute air pressure values and do not set the air pressure value manually (you do not need to enter a barometric reference value).

But if you live in an area with relatively high altitude, you can use relative air pressure by entering barometric reference values. As the air pressure usually decreases with increasing altitude, the public weather services always publish the so-called relative air pressure (REL PRESSURE). If you want to match the air pressure to your location, you can ask your local weather service for the air pressure at sea level or get the current value from the Internet.

In normal display mode, press and hold the [ALARM] key for 3 seconds to enter the setting mode for the alarm time and the outdoor temperature alarm. The setting items flash at 1Hz, while briefly pressing the [MODE] key to select the setting content, the order is as follows:

Hours of alarm 1 → Minutes of alarm 1 → Repetition (M-F/ M-S/ S-S) of alarm 1 → Snooze time (05-60 adjustable/ OFF) of alarm 1 → Hours of alarm 2 → Minutes of alarm 2 → Repetition (M-F/ M-S/ S-S) of alarm 2 → Snooze time (05-60 adjustable/ OFF) of alarm 2 → Upper alarm limit for outdoor temperature (CH1) → Lower alarm limit for outdoor temperature (CH1) → Exit

Snooze time is 5 to 60 minutes. Or you can also switch off the snooze mode permanently by setting the snooze time to OFF.

There are 3 alarm repetitions to choose from:

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

If the alarm repeat is set to M-F, the alarm function is activated from Monday to Friday and a [M-F Icon] appears under the alarm clock icon.

If the alarm repeat is set to S-S, the alarm function is activated on Saturday and Sunday and a [S-S Icon] appears under the alarm clock icon.

If the alarm repeat is set to M-S, the alarm function is activated for a whole week, a [M-F Icon] and a [S-S Icon] appear simultaneously under the alarm clock icon.

The upper and lower temperature alarm limits of the three channels are independent of each other. If you need to set the alarm limit of the three channels, please set them independently. While setting the outdoor temperature upper and lower alarm limits, you can press the [CH] key to switch the alarm settings between 3 channels (CH1→CH2→CH3).

• When the setting value flashes at 1 Hz, press the [+] key briefly to add the value by 1, press and hold the [+] key to add the value rapidly.
• When the setting value flashes at 1 Hz, press the [-] key briefly to decrease the value by 1, press and hold the [-] key to decrease the value rapidly.
• Quickly touch the touch button [☀️/?] twice during or after setting to exit the manual setting mode.
• If no operation is performed within 20 seconds, the unit saves the current setting status and automatically exits the setting mode.

3. Switching the Alarm Clock and Outdoor Temperature Alarm On/Off

In normal display mode, briefly press the [ALARM] key to switch to display the alarm time and the outdoor temperature alarm. The order is as follows:

Alarm1 → Alarm 2 → Outdoor temperature upper limit alarm → Outdoor temperature lower limit alarm → Exit

In display mode, the alarm and temperature alarm can be switched on or off by pressing the [+] key.

While the outdoor temperature upper and lower limit alarms are displayed, you can press the [CH] key to switch the alarm display between 3 channels (CH1→CH2→CH3).

• When the alarm 1 or 2 is switched on, the [Alarm 1 Icon] or [Alarm 2 Icon] appears accordingly and the alarm 1 or 2 is activated. In addition, the icon of alarm repetition is also displayed.
• When the alarm 1 or 2 is switched off, the [Alarm 1 Icon] or [Alarm 2 Icon] disappears and the alarm 1 or 2 is deactivated.
• When the outdoor temperature upper limit alarm is switched on, the [High Temp Alarm Icon] appears accordingly; when the outdoor temperature lower limit alarm is switched on, the [Low Temp Alarm Icon] appears accordingly.
• When the outdoor temperature upper or lower limit alarm is turned off, the [High Temp Alarm Icon] or the [Low Temp Alarm Icon] disappears.

4. Deactivate the Wake-up Call

• When the alarm sounds, press any key except the [☀️/?] key or press and hold the [☀️/?] key for more than 2 seconds or do nothing within 2 minutes to turn off the alarm.
• When the alarm sounds, the volume of the gradually increasing alarm tone (crescendo, duration: 2 minutes) changes four times.
• If the alarm is deactivated, the alarm is repeated automatically after 24 hours, depending on the setting.

5. Snooze Function

• When the alarm sounds, briefly press the [☀️/?] key to interrupt the alarm signal and activate the snooze mode, the snooze icon [Zz Icon] flashes. After the set snooze time has elapsed, the alarm sounds again.
• In snooze mode, press any key except the [☀️/?] key or press and hold the [☀️/?] key for more than 2 seconds or do nothing within 1 minute to exit snooze mode.
• If the snooze function is deactivated, pressing the [☀️/?] key will not switch to snooze mode.

6. Alarm Activation Status of Outdoor Temperature

• When the outdoor temperature alarm is switched on, if the outdoor temperature exceeds the set threshold, the alarm will sound (three times "BI BI BI") and the alarm icon [Alarm Icon] will flash. The outdoor temperature in the channel data area will also flash simultaneously with the corresponding Hi icon [High Temp Icon] or Lo icon [Low Temp Icon].
• In this alarm mode, press any button to stop the alarm sound, but the alarm icon and Hi/Lo icon will continue to flash.
• In addition, the weather station sounds an alarm tone (once "BI") each time the temperature alarm is triggered after the outdoor temperature has been updated. The alarm will only stop sounding if the outdoor temperature is outside the alarm range or if you switch off the alarm mode.

7. Frost Point Alarm

• When the outdoor temperature is within the range of -1°C (+30°F) to +3°C (+37°F), the [Ice Icon] icon flashes in the channel data area (but the alarm does not sound).
• The frost alarm does not need to be switched on, but also does not give an alarm tone, but is displayed as soon as the outdoor temperature is reached. The frost point of the three channels is assessed independently of each other and the [Ice Icon] icon only flashes when the temperature of the currently displayed channel triggers the frost alarm.

8. Moon Phases and Tide Display

The weather station displays the corresponding 12 moon phases according to the calendar:

[New Moon Icon] New moon     [Waxing Crescent Icon] Waxing crescent     [First Quarter Icon] First Quarter     [Waxing Gibbous Icon] Waxing gibbous     [Full Moon Icon] Full moon     [Waning Gibbous Icon] Waning gibbous     [Last Quarter Icon] Last Quarter     [Waning Crescent Icon] Waning crescent

In addition, the corresponding 3 tide levels are displayed:

• HIGH
• MEDIUM
• LOW

9. City Selection Mode (Selection of the City of Your Location)

Press the [MODE] key once briefly to enter the city selection mode. In city selection mode, use the [+] or [-] key to select the correct city using the number and the three-letter city code corresponding to the table below.

In city selection mode, press and hold the [+] or [-] key for 3 seconds, you can change the value of cities faster.

After selecting, press the [MODE] key to return to normal display mode.

10. Manual Setting of the City

If your location is not in a city in the table, you can set the city manually. However, before you make this setting, you need to check the ZONE, LONGITUDE and LATITUDE of your city.

Press and hold the [MODE] key for more than 2 seconds to enter the custom city setting mode. In setting mode, the setting item flashes at 1Hz, then briefly press the [MODE] key to select the setting content. The order is as follows:

the first letter of the custom city code → the second letter of the custom city code → the third letter of the custom city code → time zone → longitude → latitude → exit

Note: Please set the custom city code first. There are 3 codes in total, you can choose any combination of 26 letters.

Quickly touch the touch button [☀️/?] twice during or after adjustment to exit manual adjustment mode.

After you select a city differently or set it manually, the sunrise time and sunset time are automatically calculated according to the location, time zone and current time of the selected or manually set city and displayed in the corresponding area.

11. Wireless Sensor Transmission

If the base station successfully receives the signal from the outdoor sensor, the outdoor temperature and humidity are displayed in the data area of "OUT" on the base station.

The base station can be connected with up to 3 wireless sensors. If you use multiple wireless sensors, different sensors cannot be registered on the same channel at the same time.

Pressing the [CH] key switches the display of the outdoor temperature and humidity for the different channels. When the icon [Channel Icon] is displayed, each channel is displayed in turn for 5 seconds.

If the base station does not receive the transmission signal from a channel, "-- --" is displayed on the area of corresponding channel data. Briefly press the [CH] key to select the corresponding channel number. After selection, the corresponding channel number is displayed. At this time, press and hold the [CH] key for 3 seconds to receive the transmission signal again. If the signal transmission is interrupted, you can also press the [TX] key (for immediate signal transmission) in the battery compartment of the corresponding outdoor sensor to send the RF signal to the base station manually.

In normal mode, if you want to delete the current data and receive the outdoor signal again, you can also select the corresponding channel and press the [CH] key for 3 seconds to update the outdoor data.

When deleting the outdoor data, the original minimum and maximum of the outdoor temperature and humidity are also deleted together.

After completion, the base station receives the radio signal from the outdoor sensor again and displays the icon [Signal Received Icon].

12. Temperature and Humidity Measurement

Indoor temperature measuring range: -9.9°C (+14°F) to +50°C (+122°F), division value 0.1°C/ °F;

LL.L °C/ °F is displayed when the value is below -9.9 °C (+14°F);

HH.H °C/ °F is displayed when the value is above +50°C (+122°F).

Outdoor temperature measuring range: -40°C (-40°F) to +70°C (+158°F), division value 0.1°C/ °F;

LL.L °C/ °F is displayed when the value is below -40°C (-40°F);

HH.H °C/ °F is displayed when the value is above +70°C (+158°F).

Humidity measuring range: 20% to 95% RH, division value 1%RH;

19%RH is displayed when the value is below 20% RH;

96%RH is displayed when the value is above 95% RH.

Note: The indoor temperature and humidity are measured every 60 seconds. But during the 3-minute RF long reception mode, 7-minute RCC long reception mode and the wake-up alarm mode, the measurement of the indoor temperature and humidity is not performed, which is why the measurement values are not updated.

13. Display of Temperature/ Humidity with Trends

Temperature Trend:

• [Up Arrow Icon]: If the temperature has increased by 1°C (1.8°F) in each measurement compared to the previous data or if the temperature has increased by 1°C (1.8°F) in total within 1 hour, the trend arrow points upwards.
• [Horizontal Line Icon]: When switching on or when the temperature remains constant.
• [Down Arrow Icon]: If the temperature has decreased by 1°C (1.8°F) in each measurement compared to the previous data or if the temperature has decreased by 1°C (1.8°F) in total within 1 hour, the trend arrow points downwards.

Humidity Trend:

• [Up Arrow Icon]: If the humidity has increased by 5%RH in each measurement compared to the previous data, or if the total humidity has increased by 5%RH within 1 hour, the trend arrow points upwards.
• [Horizontal Line Icon]: When switching on or when the humidity remains constant.
• [Down Arrow Icon]: If the humidity has decreased by 5%RH in each measurement compared to the previous data or if the total humidity has decreased by 5%RH within 1 hour, the trend arrow points downwards.

14. Max/ Min Display for Temperature and Humidity

In normal display mode, press the [MODE] key briefly to switch between the maximum and minimum indoor/outdoor temperature/ humidity data. The "MAX" and "MIN" symbols will be displayed on the LCD. The order is as follows:

Max display → Min display → Exit

To reset the maximum and minimum temperature and humidity values, press and hold the [MODE] key for 3 seconds in Max/ Min display mode. This will reset all recorded minimum and maximum data to the currently displayed values.

Note:

• LL.L is displayed, if the temperature is below the measuring range;
• HH.H is displayed, if the temperature is above the measuring range;
• 19%RH is displayed, if the humidity is below the measuring range;
• 96%RH is displayed, if the humidity is above the measuring range.

15. Comfort Level and Mold Risk

There are 5 display modes for the comfort level, as follows:

[Happy Face Icon] Comfortable     [Neutral Face Icon]     [Slightly Sad Face Icon]     [Cold Face Icon] Too cold     [Warm Face Icon] Too warm

The weather station determines the mould risk level by intelligently evaluating the indoor temperature and humidity and there are 4 levels:

• High risk: with the symbol "HI"
• Medium risk: with the symbol "ME"
• Low risk: with the symbol "LO"
• No risk: without symbol

16. Display of Air Pressure with Trends and Histogram of Historical Pressure Development

Air pressure measuring range: 600 hPa/mb (17.72 inHg) to 1100 hPa/mb (32.48 inHg), division value 1 hPa/mb or 0.01 inHg.

The air pressure is updated hourly, at the same time the trend histogram is updated in the area from the weather forecast:

• [Up Arrow Icon]: If the air pressure has increased by 1 hPa in each measurement compared to the previous data or if the air pressure has increased by 1 hPa in total within 1 hour, the trend arrow points upwards.
• [Right Arrow Icon]: If in each measurement the air pressure shows no change in air pressure compared to the previous data or if there is no change in air pressure within 1 hour, the trend arrow points to the right.
• [Down Arrow Icon]: If the air pressure has decreased by 1 hPa in each measurement compared to the previous data or if the air pressure has decreased by 1 hPa in total within 1 hour, the trend arrow points downwards.

17. Weather Forecast

The weather station calculates a weather forecast for the next 12 hours based on the change in air pressure. Of course, this forecast cannot be compared with that of professional weather services supported by satellites and high-performance computers. This forecast only provides an approximate indication of the current weather development in a small local area. Please consider the weather forecast of your local weather service as well as the forecast of your weather station at the same time. In case of discrepancies between the indications of your device and the local weather forecast service, please accept the indications of the latter as authoritative.

The weather station displays the following 6 weather symbols:

• [Sunny Icon] Sunny
• [Partly Cloudy Icon] Partly cloudy
• [Cloudy Icon] Cloudy
• [Rainy Icon] Rainy
• [Stormy Icon] Stormy
• [Snowy Icon] Snowy

Note:

• The "snowy" icon is only displayed if the outdoor temperature is below -4°C (+5°F) and the forecast would be rainy or stormy. The outdoor temperature mentioned here is set to the temperature of CH1 by default. (If there is no signal in CH1, the base station sets the temperature of CH2 to the outdoor temperature by default. If there is no signal in CH2, the base station sets the temperature of CH3 to the outdoor temperature by default).
• It takes 7 to 10 days for the weather station to complete the air pressure calibration. After the air pressure calibration, the weather forecast stabilises with an accuracy rate of 70 to 75%.
• The weather station can give weather forecast for a radius of 12-20 kilometres.

18. Reception of the Radio Clock Signal

The weather station starts the DCF signal search automatically after 7 minutes after each restart or change of new fresh batteries. If the DCF signal search is interrupted and you need to receive the DCF signal manually, please press and hold the [RCC] key for 3 seconds to enter the DCF signal reception mode manually. The icon [Radio Signal Icon] flashes.

Note that in DCF signal reception mode, the backlight is automatically switched off and all button functions except the [+] and [☀️/?] keys are temporarily disabled. After the radio clock time signal reception is completed, the backlight is automatically switched on and the button functions are also reactivated.

The signal reception takes about 7 minutes. The icon [Radio Signal Icon] flashes when the base station successfully receives the valid DCF signal, and after the 7-minute signal reception is completed, the radio mast icon [Radio Mast Icon] is permanently shown on the display.

If you want to forcibly stop the DCF signal search, you can press and hold the [RCC] key for 3 seconds.

Every day at 1:00/ 2:00/ 3:00 the radio-controlled clock automatically synchronises with the DCF signal to compensate for any deviations from the exact time. If this synchronisation attempt fails (the radio mast icon [Radio Mast Icon] disappears from the display), the system automatically attempts another synchronisation at the next full hour. This process is automatically repeated up to a total of 5 times.

As long as the summer time function is switched on, the symbol [DST Icon] is displayed when the base station receives the time signal from summer time. (But during winter time this symbol disappears).

Note: It is definitely recommended that the weather station be kept at least 2.5 metres away from all sources of interference such as televisions, computer monitors, etc.

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

19. Low Battery Status

• If the icon [Low Battery IN Icon] appears on the display in the indoor area (IN), you need to replace the base station battery as soon as possible.
• If the icon [Low Battery OUT Icon] appears on the display in the area of channels (OUT), you need to replace the battery of the corresponding outdoor sensor as soon as possible.

20. Backlight with Adjustable Night Mode

1) Adjustable Brightness of the Backlight

• If the base station is powered by batteries only, touch the [☀️/?] key to light the display for 15 seconds.
• When the base station is operated with the mains adapter, the backlight can always remain bright. When doing so, you can press the [MODE] key to change the brightness levels of the backlight: LV4 → LV3 → LV2 → LV1 → off.
• If the backlight brightness is not set to the highest level, press the [☀️/?] key, the backlight will switch to the highest brightness level for 15 seconds.

2) Settings for Night Mode

• The backlight can also be set to dim automatically at night. Press the [☀️/?] key for 3 seconds to enter the night mode setting. Then press the [+] or [-] key, you can switch the night mode on or off (the display shows the symbol "ON/OFF").
• If the night mode is set to OFF, pressing the [MODE] key exits the setting mode and does not change to the next setting value.
• When the night mode is set to ON, in the setting mode, press the [MODE] key to set the night mode. While pressing the [+] or [-] key, you can add or decrease the setting value. The order of setting is as follows: the brightness at night (LV1 to LV3) → start hour of night mode → start minute of night mode → end hour of night mode → end minute of night mode → exit.
• Quickly touch the touch button [☀️/?] twice during or after setting to exit the manual setting mode.
• If no operation is performed within 20 seconds, the unit saves the current setting status and automatically exits the setting mode.
• When the night mode is activated, the icon [Night Mode Icon] is shown on the display. When the time to enter night mode is reached, the backlight automatically switches to the set night mode brightness and when the time to exit night mode is reached, the backlight returns to the original brightness.
• In night mode, the backlight can be switched to the highest brightness level (level 4) by pressing the [☀️/?] key for 15 seconds.
• Night mode is automatically terminated when the backlight is switched off.
• During reception of the DCF signal, the backlight is automatically closed to avoid interference with the radio waves.