SMART SENSOR ST8904 Multifunctional Gas Detector User Manual

1. Introducció

The SMART SENSOR ST8904 is a professional 4-in-1 gas detector designed for the continuous monitoring of Carbon Monoxide (CO), Hydrogen Sulfide (H₂S), Oxygen (O₂), and Combustible Gas (LEL) concentrations in the surrounding environment. This high-precision, portable device features a compact size and light weight, making it easy to carry and operate. It provides sound, vibration, and flash alarms when gas concentrations reach predefined alarm levels, ensuring safety in various industrial and environmental settings.

2. Característiques clau

• 4-in-1 Gas Detection: Simultaneously detects Carbon Monoxide (CO), Hydrogen Sulfide (H₂S), Oxygen (O₂), and Combustible Gas (LEL).
• Seguiment continu: Provides real-time, accurate measurement of gas concentrations.
• Triple Alarm System: Alerts users with sound, vibration, and flashing lights when gas levels exceed set limits.
• Pantalla LCD a color gran: High-definition display with backlight for clear and easy reading of measurements.
• Adjustable Alarm Settings: Allows setting of upper and lower alarm limits, Time-Weighted Average (TWA), and Short-Term Exposure Limit (STEL) values.
• Battery Charging Function: Equipped with a rechargeable battery and Micro USB charging port.
• Sampling Pump Compatibility: Can be connected to an external sampling pump for operation in confined or closed spaces.
• Construcció duradora: Made from ABS material for robust performance.

3. Contingut del paquet

Si us plau, reviseu el paquet acuradament per assegurar-vos que tots els articles hi són i no estan danyats:

• 1 x SMART SENSOR ST8904 4-in-1 Gas Detector
• 1 cable USB (per carregar)
• 2 x cargols
• 1 x Gas Calibration Hood
• 1 x bossa d'emmagatzematge
• 1 manual d'usuari (anglès)

4. Especificacions tècniques

5. Guia de configuració

5.1 Càrrega inicial

Before first use, fully charge the device. Connect the provided USB cable to the Micro USB port on the detector and to a standard 5V DC USB power adapter (not included). The charging indicator on the device will show the charging status. A full charge typically takes several hours.

5.2 Encès/Apagat

• Per encendre: Press and hold the power button (usually marked with a power symbol) until the LCD screen illuminates.
• Per apagar: Premeu i manteniu premut el botó d'engegada fins que el dispositiu s'apagui.

5.3 Funcionament bàsic

Upon powering on, the device will typically perform a self-test and then enter continuous monitoring mode, displaying the current concentrations of CO, H₂S, O₂, and LEL on the LCD screen.

5.4 Alarm Value Setting

The detector allows for customization of alarm thresholds. Refer to the detailed English User Manual included in your package for specific instructions on how to set the upper limit, lower limit, TWA (Time-Weighted Average), and STEL (Short-Term Exposure Limit) alarm values. These settings are crucial for tailoring the device to specific safety requirements.

5.5 Calibració

Regular calibration is essential for maintaining the accuracy of your gas detector. Use the included Gas Calibration Hood and follow the instructions in the comprehensive user manual for proper calibration procedures. Calibration should be performed in a clean air environment or with certified calibration gases as recommended by safety standards.

6. Instruccions de funcionament

6.1 Seguiment continu

Once powered on, the ST8904 continuously monitors the ambient air for the four specified gases. The current concentration levels are displayed on the large LCD screen. Ensure the sensor inlet is unobstructed for accurate readings.

6.2 Alarm Response

If any detected gas concentration reaches or exceeds its set alarm threshold, the device will activate its triple alarm system:

• Alarma sonora: A loud beeping sound.
• Alarma vibratòria: The device will vibrate.
• Alarma visual: Flashing lights on the device.

Upon an alarm, immediately assess the situation and take appropriate safety measures, such as evacuating the area or initiating ventilation. Do not re-enter an alarmed area until gas levels have returned to safe limits.

6.3 Using with a Sampling Pump (Optional)

For monitoring in confined spaces or areas difficult to access, the ST8904 can be connected to an external sampling pump (DC 3V power supply). This allows for remote sampling of air, drawing it into the detector for analysis. Ensure the sampling pump is correctly attached and functioning before use in such environments.

7. Manteniment

7.1 Neteja

Wipe the exterior of the detector with a soft, damp cloth. Do not use abrasive cleaners, solvents, or immerse the device in water. Keep the sensor inlet free from dust and debris.

7.2 Emmagatzematge

When not in use, store the detector in its provided storage bag in a cool, dry place, away from direct sunlight and extreme temperatures (Storage Temperature: 0~40℃). Ensure the battery is partially charged before long-term storage to prevent deep discharge.

7.3 Cura de la bateria

Recharge the battery when the low battery indicator appears on the display. Avoid completely draining the battery frequently to prolong its lifespan. Use only the specified Micro USB DC 5V charging method.

7.4 Sensor Lifespan and Replacement

Gas sensors have a limited lifespan. While the exact lifespan can vary based on usage and environmental conditions, regular calibration helps to identify when sensors may need replacement. Consult the full user manual or contact customer support for information on sensor replacement.

8. Solució De Problemes

• El dispositiu no s'encén: Assegureu-vos que la bateria estigui completament carregada. Si el problema persisteix, proveu de carregar-la amb un altre cable o adaptador USB.
• No gas readings: Check if the sensor inlet is clear of obstructions. Ensure the device is in an environment where gas is expected. If in a clean air environment, readings should be near zero (except O₂).
• Alarm not sounding/vibrating/flashing: Verify that alarm settings are correctly configured. Check the device's volume and vibration settings. Ensure the battery has sufficient charge.
• Lectures inexactes: Perform a calibration as described in the user manual. Ensure the device is used within its specified operating temperature and humidity ranges.
• Problemes amb la pantalla LCD: If the display is dim or unreadable, ensure the backlight is active and the battery is charged.

For persistent issues not covered here, please refer to the detailed user manual or contact customer support.

9. Consells d'usuari

• Customize TWA/STEL: Avançanttage of the ability to modify Time-Weighted Average (TWA) and Short-Term Exposure Limit (STEL) alarm values to suit specific workplace safety regulations or personal preferences. This allows for more precise monitoring over different exposure durations.
• Calibració regular: Even if readings appear consistent, perform regular calibrations to ensure long-term accuracy and reliability of the sensors.
• Consciència ambiental: Always be aware of the environmental conditions (temperature, humidity) as they can affect sensor performance.

10. Garantia i Suport

The SMART SENSOR ST8904 Multifunctional Gas Detector is manufactured to high-quality standards. For specific warranty details, please refer to the warranty card included with your product or contact the seller directly. Keep your purchase receipt as proof of purchase.

For technical support, troubleshooting assistance, or inquiries regarding parts and service, please contact your point of purchase or the SMART SENSOR customer service department.