1. Introduction
The BENETECH Non-Contact Infrared Thermometer is designed for quick and accurate temperature measurement of various surfaces without physical contact. It is ideal for measuring high-temperature, hazardous, or hard-to-reach objects. The device operates by detecting the infrared energy radiated from an object's surface, converting it into an electrical signal, and displaying the temperature reading on an LCD screen.
This unit consists of an optical system, photoelectric sensor, signal amplifier, signal processing circuit, and LCD display. The optical system converges infrared energy radiated from the object's surface onto the photoelectric sensor, which converts the energy into a corresponding electrical signal. This signal is then amplified and processed into a digital reading displayed on the LCD.
2. Consignes de sécurité
2.1. Avertissements
- Do not point the laser directly at eyes or indirectly at eyes via reflective surfaces when using this unit.
- This instrument cannot measure through transparent surfaces. For example, glass, plastic, etc. Otherwise, the measured value will be the surface temperature of the transparent object.
- Moisture, dust, smoke, or other particles will obstruct the instrument's lens, affecting measurement accuracy.
2.2. Précautions
- Protect the thermometer from electromagnetic fields (EMF) generated by arc welders and induction heaters.
- If moving between environments with large or drastic changes in ambient temperature (thermal shock), wait 30 minutes for the thermometer to stabilize before use.
- Do not place the thermometer near or on high-temperature objects.
3. Produit terminéview
3.1. Composants
The thermometer features a pistol-grip design for comfortable handling. Key components include:
- Infrared Sensor & Laser Aperture
- Écran LCD
- Déclenchement
- Control Buttons (MODE, UP/Laser, C/F)
- Compartiment à piles
Figure 1 : Face avant view of the GM333 model, showing the display, buttons, and trigger.
Figure 2 : Côté view of the GM333 model, highlighting the trigger and battery compartment location.
Figure 3 : Haut view of the GM333 model, illustrating the Distance-to-Spot (D:S) ratio.
3.2. LCD Display Indicators (Refer to Figure 4 in the manual image)
Figure 4: Excerpt from the manual showing LCD display and button functions.
- HOLD Symbol: Indicates the last measurement is held on the display.
- Laser Aiming Symbol: Indique lorsque le pointeur laser est actif.
- Backlight On Symbol: Indique que le rétroéclairage de l'écran est actif.
- Emissivity Symbol: Affiche le réglage d'émissivité actuel.
- Symbole de batterie faible : Alertes en cas de batterie faible.
- Auto Power Off Symbol: Indicates the auto-off feature is active.
- Ambient Temperature Symbol: Affiche la température ambiante actuelle.
- MAX/MIN Symbols: Indicate maximum or minimum temperature modes.
- °C/°F Unit Symbols: Shows the selected temperature unit (Celsius or Fahrenheit).
- Current Measurement Reading: The main temperature value.
4. Spécifications
| Paramètre | GM333 / GM333A | GM533A |
|---|---|---|
| Plage de température de mesure | -50°C à 400°C (-58°F à 752°F) | -50°C à 530°C (-58°F à 986°F) |
| Précision de mesure | 0°C ~ 400°C (32°F ~ 752°F): ±1.5°C (±2.7°F) or ±1.5% -50°C ~ 0°C (-58°F ~ 32°F): ±3°C (±5°F) | |
| Résolution | 0.1°C ou 0.1°F | |
| Répétabilité | 1% de la lecture ou 1 ° C | |
| Temps de réponse | 500 mSec, réponse à 95 % | |
| Réponse spectrale | 5 µm-14 µm | |
| Rapport distance/point (D:S) | 12:1 | |
| Émissivité | 0.95 (Fixe) | 0.10 1.00 à XNUMX XNUMX (réglable) |
| Température de fonctionnement | 0°C à 40°C (32°F à 104°F) | |
| Humidité de fonctionnement | 10% RH - 90% RH non-condensing | |
| Température de stockage | -20°C à 60°C (-4°F à 140°F) | |
| Pouvoir | Batterie 2 x 1.5V AAA | |
| Autonomie de la batterie | Environ 12 heures | |
4.1. Emissivity Table (Common Materials)
Figure 5: Excerpt from the manual showing common material emissivity values.
| Matériel | Émissivité |
|---|---|
| Pierre | 0.70 |
| Glace | 0.97 |
| Peinture | 0.93 |
| Eau | 0.93 |
| Bois | 0.94 |
| Caoutchouc | 0.95 |
| Béton | 0.94 |
| Asphalte | 0.94 |
| Brique | 0.93 |
| Papier | 0.90 |
| Céramique | 0.92 |
| Verre | 0.85 |
| Fer | 0.70 |
| Cuivre | 0.78 |
| Aluminium | 0.90 |
| Huile | 0.94 |
| Nourriture | 0.90 |
| Peau | 0.98 |
5. Installation
5.1. Installation de la batterie
- Locate the battery compartment on the handle (refer to Figure 2).
- Ouvrez le couvercle du compartiment à piles.
- Insert two (2) 1.5V AAA batteries, ensuring correct polarity.
- Fermez soigneusement le couvercle du compartiment à piles.
6. Mode d'emploi
6.1. Mesure rapide
- Pull the trigger to turn on the device. The LCD will display "SCAN" and the current temperature.
- Aim the laser pointer at the center of the object you wish to measure.
- Release the trigger. The temperature reading will be held on the display ("HOLD" symbol will appear).
- The device will automatically shut off after approximately 20 seconds of inactivity.
6.2. Localisation des points chauds
To find a hot spot, aim the thermometer at the area and slowly scan the region by moving the laser spot up and down. The highest temperature detected will be displayed.
Figure 6: Excerpt from the manual illustrating hot spot location technique.
6.3. Fonctions des boutons
- C/F Button (Red Button): Press to switch between Celsius (°C) and Fahrenheit (°F) temperature units.
- UP Arrow / Laser Button:
- Press to turn the laser pointer ON or OFF.
- In Emissivity (EMS) or Calibration (CAL) mode, use this button to increase values.
- DOWN Arrow / MODE Button:
- Press to cycle through measurement modes: MAX (Maximum), MIN (Minimum), AVG (Average), DIF (Difference), EMS (Emissivity), CAL (Calibration), and back to the standard measurement interface.
- In Emissivity (EMS) or Calibration (CAL) mode, use this button to decrease values.
Note on MAX/MIN modes: When in MAX or MIN mode, hold the trigger to continuously measure. The display will show the maximum or minimum temperature recorded during that continuous measurement session.
6.4. Advanced Functions (GM333A & GM533A only)
- Emissivité réglable : In EMS mode, use the UP/DOWN buttons to adjust the emissivity value between 0.10 and 1.00.
- Auto-étalonnage : In CAL mode, use the UP/DOWN buttons to adjust the calibration offset between -5.0°C and +5.0°C.
- Alarme haute/basse température : Set high and low temperature thresholds. An alarm will sound if the measured temperature exceeds or falls below these limits. (Specific setting instructions may vary, refer to on-screen prompts).
7. Entretien
7.1. Nettoyage de l'objectif
- Use clean compressed air to blow away any loose contaminants.
- Gently wipe away small residues with a damp coton-tige.
- Carefully wipe the surface with a damp tissu en coton.
- Do NOT use any solvents to clean the plastic lens.
7.2. Nettoyage du Casing
Nettoyer le thermomètre casing avec publicitéamp sponge or soft cloth using mild soap and water.
Warning: Do NOT immerse the thermometer in water.
8. Dépannage
- No display or low battery indicator: Remplacez les piles par des piles AAA neuves de 1.5 V.
- Lectures inexactes :
- Assurez-vous que la lentille est propre et exempte d'obstructions.
- Check the emissivity setting (if adjustable) and adjust it according to the material being measured.
- Allow the device to stabilize for 30 minutes if moved between environments with significant temperature changes.
- Assurez-vous que le rapport D:S est approprié à votre distance de mesure.
- Laser défectueux : Check if the laser is enabled via the UP/Laser button.
- L'appareil ne s'allume pas : Vérifiez l'installation et la charge de la batterie.
9. Garantie et assistance
For warranty information or technical support, please contact your seller or the manufacturer directly. Keep your purchase receipt as proof of purchase.
