WL 1025 - Climate control TECHNOLINE - Free user manual and instructions

Product Type	Indoor air quality monitor (CO₂, temperature, humidity)
Brand	TECHNOLINE
Model	WL 1025
Power supply	DC 5.0V, 600mA via USB cable + built-in lithium battery
CO₂ measurement range	400 to 5000 ppm
Temperature measurement range	-9.9°C to 50°C
Temperature resolution	0.1°C
Humidity measurement range	1% to 99%
Humidity resolution	1%
TVOC measurement range	0 to 9.999 mg/m³
Display	Digital with adjustable backlight (4 levels)
Functions	12/24 hour display, snooze alarm, CO₂ alarm, 24h history, CO₂ trend, min/max values
Calibration	Automatic and manual
Battery life	Several hours (depending on use)
Maintenance	Clean with a soft dry cloth. Avoid moisture and dust.
Safety	Indoor use only. Do not open the casing. Do not throw into fire.
Spare parts	Not available. For repair, contact customer service.
Compliance	Directive 2014/53/EU and ROHS 2011/65/EC

Frequently Asked Questions - WL 1025 TECHNOLINE

How to set the time and alarm?

Press the TIME button for 3 seconds to enter programming mode. Use the + and - buttons to adjust values, then press TIME to confirm. The setting order is: 12/24h, hours, minutes, alarm hours, alarm minutes, temperature unit (°C/°F). The setting stops automatically after 30 seconds of inactivity.

How to manually calibrate the CO₂ sensor?

In normal display mode, press the + button for 2 seconds to enter manual calibration mode. Confirm with the TIME button or wait 30 seconds to exit. Place the device in an environment with 400 ppm CO₂ (for example outdoors) during calibration, which lasts up to 20 minutes.

What do the colors and bars for CO₂ mean?

The current CO₂ concentration is displayed with 4 levels: EXCELLENT (400-600 ppm), GOOD (601-1000 ppm), MEDIUM (1001-1500 ppm), POOR (1501-2000 ppm). Beyond 2001 ppm, the POOR indication flashes. An 8-level bar chart represents the history of the last 24 hours.

How to enable or disable the CO₂ alarm?

Press the - button to enable or disable the CO₂ alarm function. To set the threshold, press - for 2 seconds until the value flashes, then use + or - to adjust and TIME to confirm.

Why does the display flash or show 'LL' or 'HH'?

The display LL appears if the temperature drops below -9.9°C, and HH if it exceeds 50°C. An alarm symbol flashes when the alarm sounds. If the low battery icon appears, connect the USB cable to recharge.

How to interpret the CO₂ trend arrow?

The arrow indicates the change in CO₂ concentration over the last hour: upward if it increases by more than 100 ppm, downward if it decreases by more than 100 ppm, and diagonal if the change is less than 100 ppm.

What to do if the device does not turn on?

Check that the sliding switch on the side is set to ON. If the battery is discharged, connect the USB cable to a 5V/1A power supply. After connection, the device emits a beep and all symbols light up. Wait up to 60 seconds for the CO₂ sensor initialization.

What is the battery life and how to recharge it?

The built-in lithium battery provides several hours of autonomy. To recharge, connect the supplied USB cable to a mains power supply (5V/1A). During charging, the battery icon remains displayed. It is advisable to leave the device plugged in as often as possible to preserve the battery.

Can I use the device on battery only?

Yes, the device can operate solely on lithium battery. However, for prolonged use, it is recommended to plug it into mains power. The device automatically switches to battery in case of power outage.

Where to place the device for accurate CO₂ measurement?

Place the device on a flat surface, in a well-ventilated area, away from direct sunlight, strong drafts, and dust. Before first use, leave it in a ventilated environment for at least one hour to stabilize the sensors.

USER MANUAL WL 1025 TECHNOLINE

A1 – CO2 concentration alarm

A7 – CO2 concentration trend

A2 – 24 hour CO2 history

A8 - Low power indicator

A3 – Maximum values icon

A9 – Colored CO2 appraisal

A4 – Temperature

A10 – Minimum values icon

A5 – Alarm icon

A11 – Humidity

A6 – CO2 concentration

A12 - Time

B - Case and buttons

B1 - "LIGHT (") button
B2 - "-" button
B3 - "+" button

B4 - "TIME ( )" button
B5 - DC power connection
B6 - "ON/OFF" power switch

Main functions

Quartz clock
12/24 hour time display
Alarm with 5-minute snooze function
- Display of indoor temperature in ^ C / ^ and humidity
- Display of CO2 concentration
MIN/MAX value memory for temperature, humidity and CO2
- Carbon dioxide (CO2) display as numbers and text
The 24-hour histogram of average CO2 concentration
- Trend display of carbon dioxide concentration
CO2 concentration alarm function
- Manual calibration for CO2 concentration and automatic calibration of CO2 alarm
- Four level backlight function (high-medium-low-off)
- Low power indication and charging indication of built-in lithium battery

EN2

Getting started: Use with USB adapter

• Use only the included USB adapter to connect a powered device with the WL 1025. Or use a standard DC 5.0V/1A USB-Adapter (not included) to connect the USB adapter cable to an household power socket.
• After connection to the DC power supply, push the switch "

" to the ON position to start the product. At this time, all the icons on the screen will be displayed, and make a double beep sound, before entering the normal working mode. 60-second countdown appears on the screen, indicating that the CO2 sensor is warming up.

Use with built-in battery

• When using DC power supply for power supply, the lithium battery inside the product will be charging. When the DC is disconnected, it will be switched to lithium battery for power supply, or it can be start directly with lithium battery power supply. A fully charged lithium battery ensures about 5 hours uninterrupted operation.

Notes

• The CO2 sensor will be initialized for about 60 seconds and then the CO2 values and displays will be updated and shown.
• Place the WL 1025 securely on a flat surface with enough free space on all sides. This way, the CO2 sensor and the thermo-hygro sensor within the WL 1025 can get the best results.
• It is recommended to use DC power supply for a long time, and try not to use the built-in lithium battery to low power.

Time and alarm time setting

• In normal display mode, hold the “ ” button for 3 seconds to enter the setting mode.
• Press the "+" or the "-" button to adjust the setting and press the " " button to confirm each setting. Keep the "+" or the "-" button pressed, to accelerate the process and reach the desired value more quickly.
• The setting sequence is shown as follows: 12/24 hour display -> hour -> minute -> alarm time hour -> alarm time minute -> °C/°F temperature unit -> exit

Note:

• The setting will automatically exit after 30 seconds without EN4

any adjustment from buttons and will return to display mode.

Turning alarm on/off:

• Press the " " button to turn the alarm on or off. The alarm icon is displayed as long as the alarm if turned on.

Alarm and snooze function:

• When alarm sounds, alarm icon is flashing. Press the “-” button to activate the snooze alarm (alarm icon keeps flashing on the LCD and alarm sounds again in 5 minutes) or any other button to stop the alarm. The alarm will sound at the same time of the next day.
• Press any button except the “ ” button during the active snooze function to stop the snooze alarm.

Note:

• The alarm will sound for 1 minute, before it automatically stops, if not interrupted by pressing any buttons.

Temperature & humidity

• Temperature and humidity detection frequency is 5 seconds.

Maximum / minimum temperature & humidity

• In normal display mode, press the "+" button to view maximum and minimum values of temperature, humidity and CO2. MAX will be displayed while viewing maximum values and MIN will be displayed while viewing minimum values.

• Press and hold the "+" button for 2 seconds while viewing the max and min values, you can clear the max and min values and start recording again.

• The maximum and minimum records will be automatically cleared and re-recorded at 0:00 each day.

CO2 concentration and CO2 trend display

• CO2 concentration is displayed by an 8 grid bar graph, who change accordingly to the measured CO2 value:

• According to the change of carbon dioxide concentration, if it rises within one hour or more than or equal to 100 ppm, the arrow points up; if it drops within one hour or more than or equal to 100 ppm, the arrow points down; if it does not exceed 100 ppm within one hour, the arrow points flat.

• Carbon dioxide concentration detection frequency is 5 seconds.

• According to the current CO2 concentration value, there are four levels of CO2 appraisal:

EN6

EXCELLENT: 400 600 ppm;

GOOD: 601 ~ 1000 ppm;

MEDIUM: 1001 1500 ppm;

POOR: 1501~2000 ppm;

POOR is flashing: 2001 ppm and above

CO2 concentration in 24 hour history display

• CO2 concentration history is displayed by an 8 grid bar graph, who changes accordingly to the measured CO2 value:

8 Grid: 3501 ~ 5000 ppm
7 Grid: 2001 ~ 3500 ppm
6 Grid: 1501 ~ 2000 ppm
5 Grid: 1001-1500 ppm
4 Grid: 801 1000 ppm
3 Grid: 601 ~ 800 ppm
2 Grid: 501 600 ppm
1 Grid: 400 500 ppm

• The average CO2 concentration over 24 hours will be briefly shown in a bar chart: -24h, -18h, -12h, -9h, -6h, -3h, -0h.

Calibration of CO2:

EN7

The sensor has an automatic calibration and can therefore be used immediately. This usage variant is recommended. A manual calibration is also possible.

Manual calibration function:

• In normal display mode, press and hold the "+" button for 2 seconds to enter manual calibration mode. At this time, you can press "to confirm entry, or press" + "or do not press the button for 30 seconds to exit manual calibration mode.
• The operation time of manual calibration mode is 20 minutes. During the operation, you can press "+" to exit in advance.

Carbon dioxide concentration alarm:

• Press "--" to turn on or off the alarm function.
• Press and hold "--" for 2 seconds to enter the CO2 concentration alarm setting. The CO2 concentration value flashes. Press the "+" or the "-" button to adjust.
• Press " " to confirm and exit the setting mode, or you can also save the setting and exit the setting mode without pressing any button for 30 seconds at any time.

Notes:

• Due to transportation, vibration, aging and other reasons, the carbon dioxide sensor may cause the zero drift and the detection accuracy is reduced. In order to restore the accuracy of the sensor, manual calibration can be adopted to correct the drift. During the calibration process, place the product in an environment with an outdoor atmospheric CO2 concentration level (about 400ppm) to ensure that the CO2 concentration in the environment is stable.

• Due to transportation, vibration, aging and other reasons, the carbon dioxide sensor may cause zero drift and reduce the detection accuracy, so the sensor will correct the drift through the built-in automatic calibration algorithm. About 48 hours after sensor start, will be stored within 48 hours minimum carbon dioxide concentration values, to amend the basic value of the atmospheric environment outdoor carbon dioxide concentration (about 400ppm ), since the time of about 7 days, will be stored within 7 days of the lowest carbon dioxide concentration values, to amend the basic value of the atmospheric environment outdoor carbon dioxide concentration (about 400ppm ). The cycle was then repeated for 7 days. Please ensure that the CO2 concentration is reduced to the outdoor atmospheric level (about 400ppm ) within about 48 hours after the

sensor start and for each 7 days of continuous operation.

• Push the power switch to ON and connect the product with the USB-Adapter to a power source. This will be regarded as the sensor start. If the symbol of low power appears when the lithium battery is used for power supply, then it will be regarded as the sensor start after the DC is re-inserted for power supply.
• Automatic calibration function is suitable for people who are active in office, at home or do other non-all-weather activities and people who enjoy a good ventilated environment. It is not applicable to agricultural greenhouses, farms, warehouses and other places.
• During carbon dioxide detection, avoid product vibration and direct blowing on the sensor by strong winds, which may cause deviation of the carbon dioxide detection value.

Backlight brightness levels:

• Touch " " to switch backlight level, a total of four levels (high - medium - low - off).

Low power indicator:

• The low power indicator " " will be displayed, when the monitor has low battery power

EN10

• The product will turn off the backlight function, carbon dioxide detection function, etc. to ensure the continuous operation of the time function.
• Use the USB adapter to power the monitor and recharge the built-in battery to avoid losing previously made settings.
• In the process of built-in battery charging, the low power symbol " 1 is displayed scrolling, and the battery symbol is hidden after full.

Manual reset:

• Set the power slide to OFF to turn off the monitor and then move the power slide back to ON to turn on the monitor. This action will reset the monitor to factory settings.
• WL 1025 should not be placed in a polluted environment for a long time (eg: sealed boxes, contaminated environments).
• Before the WL 1025 is used, it should be placed in a well-ventilated environment to work for more than 1 hour to ensure accurate readings.

Troubleshooting:

• Do not touch the sensor or don't store the item in packaging materials with strong smell, so as not to affect

the accuracy of the sensor.

• WL 1025 should not be placed in a polluted environment for a long time (eg: sealed boxes, contaminated environments).
• Before the WL 1025 is used, it should be placed in a well-ventilated environment to work for more than 1 hours to ensure accurate readings.

Declaration of conformity

Hereby, Technotrade declares that this product WL 1025 is in compliance with the essential requirements and other relevant provisions of Directive 2014/53/EU and ROHS 2011/65/EC. The original EU declaration of conformity may be found at:

Product Specifications

Humidity measurement range: 1% 99%

Humidity resolution: 1%

Temperature measurement range: -9.9 50^ , lower than -9.9^ shows LL, higher than 50^ shows HH.

Temperature resolution: 0.1^

CO2 detection range: 400-5000 PPM

Power supply: DC 5.0V 500mA

EN12

Precautions

• This item is intended to be used only indoors.
• Do not subject the item to excessive force or shock.
• Do not expose the item to extreme temperatures, direct sunlight, dust or humidity.
• Do not immerse in water.
• Avoid contact with any corrosive materials.
• Do not dispose this item in a fire as it may explode.
• Do not open the inner back case or tamper with any components of this item.

Use the product only for its intended purpose!

Consideration of duty according to the law of electrical devices

This symbol means that you must dispose of electrical devices separated from the General household waste when it reaches the end of its useful life. Take your item to your local waste collection point or recycling centre. This applies

to all countries of the European Union, and to other European countries with a separate waste collection system.

B6 - Bouton coulissant - "ON/OFF"

MEDIUM: 1001-1500 ppm;

POOR: 1501-2000 ppm;

B6 – “ON/OFF”-schakelaar

MEDIUM: 1001 1500 ppm;

POOR: 1501~2000 ppm;

POOR knippert: 2001 ppm en hoger

'Laag vermogen'-indicator:

Voeding: DC 5,0 V 600 mA

MEDIUM: 1001 1500 ppm;

POOR: 1501 ~ 2000 ppm;

MEDIUM: 1001-1500 ppm;

POOR: 1 501-2 000 ppm;

Napajeni: 5,0 V DC 600 mA

MEDIUM: 1001-1500 ppm;

POOR: 1501-2000 ppm;

POOR miga: 2001 ppm iantiago