1. Inleiding
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. Veiligheidsinligting
2.1. Waarskuwings
- 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. Waarskuwings
- 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. Produk verbyview
3.1. Komponente
The thermometer features a pistol-grip design for comfortable handling. Key components include:
- Infrared Sensor & Laser Aperture
- LCD-skerm
- Sneller
- Control Buttons (MODE, UP/Laser, C/F)
- Batterykompartement
Figuur 1: Voorkant view of the GM333 model, showing the display, buttons, and trigger.
Figuur 2: Kant view of the GM333 model, highlighting the trigger and battery compartment location.
Figuur 3: Bo 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: Shows when the laser pointer is active.
- Backlight On Symbol: Indicates the display backlight is active.
- Emissivity Symbol: Vertoon die huidige emissiwiteitsinstelling.
- Lae battery simbool: Alerts when battery power is low.
- Auto Power Off Symbol: Indicates the auto-off feature is active.
- Ambient Temperature Symbol: Shows the current ambient temperature.
- 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. Spesifikasies
| Parameter | GM333 / GM333A | GM533A |
|---|---|---|
| Measurement Temperature Range | -50°C tot 400°C (-58°F tot 752°F) | -50°C tot 530°C (-58°F tot 986°F) |
| Meting Akkuraatheid | 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) | |
| Resolusie | 0.1°C of 0.1°F | |
| Herhaalbaarheid | 1% van lesing of 1°C | |
| Reaksie Tyd | 500 mSek., 95% reaksie | |
| Spektrale reaksie | 5um-14um | |
| Afstandspuntverhouding (D:S) | 12:1 | |
| emissiwiteit | 0.95 (Vaste) | 0.10-1.00 (Adjustable) |
| Bedryfstemperatuur | 0°C tot 40°C (32°F tot 104°F) | |
| Bedryfshumiditeit | 10% RH - 90% RH non-condensing | |
| Bergingstemperatuur | -20°C tot 60°C (-4°F tot 140°F) | |
| Krag | 2 x 1.5V AAA-battery | |
| Batterylewe | Ongeveer. 12 uur | |
4.1. Emissivity Table (Common Materials)
Figure 5: Excerpt from the manual showing common material emissivity values.
| Materiaal | emissiwiteit |
|---|---|
| Klip | 0.70 |
| Ys | 0.97 |
| Verf | 0.93 |
| Water | 0.93 |
| Hout | 0.94 |
| Rubber | 0.95 |
| Beton | 0.94 |
| Asfalt | 0.94 |
| Baksteen | 0.93 |
| Papier | 0.90 |
| Keramiek | 0.92 |
| Glas | 0.85 |
| Yster | 0.70 |
| Koper | 0.78 |
| Aluminium | 0.90 |
| Olie | 0.94 |
| Kos | 0.90 |
| Vel | 0.98 |
5. Opstelling
5.1. Battery Installasie
- Locate the battery compartment on the handle (refer to Figure 2).
- Maak die batteryvakdeksel oop.
- Insert two (2) 1.5V AAA batteries, ensuring correct polarity.
- Maak die batterykompartement se deksel stewig toe.
6. Bedryfsinstruksies
6.1. Quick Measurement
- 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).
- Die toestel sal outomaties afskakel na ongeveer 20 sekondes van onaktiwiteit.
6.2. Locating Hot Spots
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. Knoppie Funksies
- 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)
- Verstelbare emissie: In EMS mode, use the UP/DOWN buttons to adjust the emissivity value between 0.10 and 1.00.
- Self-kalibrasie: In CAL mode, use the UP/DOWN buttons to adjust the calibration offset between -5.0°C and +5.0°C.
- Hoë/lae temperatuur alarm: 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. Onderhoud
7.1. Skoonmaak van die lens
- Use clean compressed air to blow away any loose contaminants.
- Gently wipe away small residues with a damp watte depper.
- Carefully wipe the surface with a damp katoen lap.
- Do NOT use any solvents to clean the plastic lens.
7.2. Skoonmaak van die Casing
Maak die termometer skoon casing met advertensieamp sponge or soft cloth using mild soap and water.
Warning: Do NOT immerse the thermometer in water.
8. Probleemoplossing
- No display or low battery indicator: Replace the batteries with new 1.5V AAA batteries.
- Onakkurate lesings:
- Maak seker dat die lens skoon en vry van obstruksies is.
- 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.
- Ensure the D:S ratio is appropriate for your measurement distance.
- Laser not working: Check if the laser is enabled via the UP/Laser button.
- Toestel skakel nie aan nie: Check battery installation and charge.
9. Waarborg en Ondersteuning
For warranty information or technical support, please contact your seller or the manufacturer directly. Keep your purchase receipt as proof of purchase.
