1. Introducció
The KETOTEK KT-400Y is a non-contact infrared thermometer designed for safe and accurate temperature measurement of various surfaces. It features a laser pointer for precise targeting, a clear backlit display, and the ability to switch between Celsius and Fahrenheit units. This device is suitable for a wide range of applications including cooking, automotive maintenance, industrial use, and general home tasks.
Note: This thermometer is not intended for measuring human body temperature.

Image 1.1: Important safety notice regarding body temperature measurement.
2. Informació important de seguretat
- Seguretat làser: Do not look directly into the laser beam or point it at people or animals. This product uses a Class 2 laser.
- Not for Body Temperature: This device is designed for industrial and surface temperature measurement only. It is not a medical device and should not be used to measure human or animal body temperature.
- Seguretat elèctrica: Do not use the thermometer near strong electromagnetic fields.
- Condicions ambientals: Eviteu exposar el dispositiu a temperatures extremes, humitat o llum solar directa.
- Neteja: Utilitzeu un suau, damp cloth for cleaning. Do not use abrasive cleaners or immerse the device in water.
3. Producte acabatview
3.1 Components

Image 3.1: Key components of the KETOTEK KT-400Y Infrared Thermometer.
- Làser: Emits a red laser dot for targeting the measurement area.
- Sonda del termòmetre: The infrared sensor for temperature detection.
- Activador: Press to activate the laser and take a temperature reading.
- Compartiment de la bateria: Located in the handle, holds 2 AAA batteries.
- Laser Button: Activates/deactivates the laser pointer.
- Botó de retroil·luminació: Turns the display backlight on/off.
- Botó °C/°F: Switches between Celsius and Fahrenheit temperature units.
3.2 Característiques de visualització

Imatge 3.2: Detallada view of the display icons and indicators.
- Visualització de la temperatura: Shows the measured temperature.
- Unitat de temperatura: Indicates whether the reading is in Celsius (°C) or Fahrenheit (°F).
- Data Hold Icon (HOLD): Appears when the last measurement is held on the screen.
- Scanning Icon (SCAN): Appears when the trigger is pressed and the device is actively measuring.
- Laser On Icon: Indicates the laser pointer is active.
- Backlight On Icon: Indicates the display backlight is active.
- Indicador de bateria baixa: Alertes quan cal substituir les piles.
4. Configuració
4.1 Instal·lació de la bateria
- Localitzeu el compartiment de les piles al mànec del termòmetre.
- Obriu la tapa del compartiment de la bateria.
- Insert two (2) AAA alkaline batteries, ensuring correct polarity (+/-).
- Tanqueu bé la tapa del compartiment de la bateria.
The device is now ready for use. The thermometer includes 2 AAA batteries.
5. Funcionament
5.1 Prendre una mesura
- Point the thermometer at the target surface. Ensure the distance-to-spot ratio (D:S) of 12:1 is considered for accurate readings. For example, at 12 inches distance, the measurement spot diameter is 1 inch.
- Press and hold the trigger. The laser pointer will activate (if enabled) and the 'SCAN' icon will appear on the display.
- The temperature reading will be displayed instantly.
- Release the trigger to hold the measurement on the display. The 'HOLD' icon will appear. The device will automatically power off after approximately 10 seconds of inactivity to conserve battery life.
5.2 Canvi d'unitats de temperatura (°C/°F)
With the device powered on, press the '°C/°F' button located below the display to toggle between Celsius and Fahrenheit units.

Imatge 5.1: Ex.ample of temperature display in Celsius and Fahrenheit.
5.3 Ús de la retroiluminació
Press the backlight button (light bulb icon) to turn the display backlight on or off. This improves readability in low-light conditions.
5.4 Punter làser
Press the laser button (triangle icon) to activate or deactivate the laser pointer. The laser helps in precisely identifying the measurement spot.
5.5 Emissivitat
The KETOTEK KT-400Y has a fixed emissivity setting of 0.95, which is suitable for most organic materials, painted surfaces, and many common materials. For highly reflective surfaces, readings may be less accurate.
5.6 Aplicacions

Imatge 5.2: Ex.amples of practical applications for the thermometer.
This thermometer is versatile and can be used for:
- Cooking and barbecue temperature checks.
- Automotive diagnostics (engine, tires).
- HVAC system checks.
- Home insulation and energy efficiency audits.
- General industrial and household temperature monitoring.
6. Manteniment
6.1 Neteja
- Clean the lens with a soft, clean cloth or cotton swab and rubbing alcohol. Allow the lens to dry completely before use.
- Netegeu el termòmetre casing amb anunciamp sponge or soft cloth and mild soap. Do not use abrasive cleaners.
- Ensure no liquid enters the device.
6.2 Emmagatzematge
- Guardeu el termòmetre en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.
- Traieu les piles si no heu d'utilitzar el dispositiu durant un període prolongat per evitar fuites.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| No hi ha pantalla/El dispositiu no s'encén | Piles baixes o gastades; instal·lació incorrecta de la bateria | Canvieu les piles; comproveu la polaritat de la pila |
| Lectures inexactes | Dirty lens; Distance too far; Emissivity mismatch (for specific materials); Object too small | Clean lens; Move closer to target; Ensure target fills measurement spot; Consider surface emissivity (fixed at 0.95 for this model) |
| El làser no funciona | Laser disabled; Low battery | Press the laser button; Replace batteries |
| Display backlight not working | Backlight disabled; Low battery | Press the backlight button; Replace batteries |
8. Especificacions

Image 8.1: Physical dimensions of the thermometer.
| Característica | Especificació |
|---|---|
| Model | KT-400Y |
| Interval de temperatura | -50 °C a 600 °C (-58 °F a 1112 °F) |
| Precisió | ±2% or 2°C (±3.6°F) |
| Distance Spot Ratio (D:S) | 12:1 |
| Emissivitat | Fixat en 0.95 |
| Temps de resposta | 500 ms |
| Resposta espectral | 8-14 µm |
| Font d'alimentació | 2 piles AAA (incloses) |
| Apagat automàtic | Approx. 10 seconds of inactivity |
| Dimensions (L x A x A) | 15 x 9 x 3.8 cm (5.9 x 3.5 x 1.5 polzades) |
| Pes | 166 grams (0.37 lliures) |
| Material | Plàstic ABS |
| Tipus de visualització | Digital amb retroiluminació |
| Característiques especials | High precision, Low battery indicator, Data Hold |
9. Garantia i Suport
KETOTEK products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase or visit the official KETOTEK weblloc web. Si us plau, conserveu el comprovant de compra per a reclamacions de garantia.





