1. Introducció
The SMART SENSOR ST8904 is a professional, portable 4-in-1 gas detector designed for continuous monitoring of Carbon Monoxide (CO), Hydrogen Sulfide (H₂S), Oxygen (O₂), and Combustible Gas (LEL) concentrations in the surrounding environment. This device provides accurate measurements and features sound, vibration, and flash alarms to alert users when gas concentrations reach dangerous levels. Its compact size and robust design make it suitable for various industrial applications.
2. Producte acabatview
2.1 Característiques clau
- Detects 4 types of gas: CO, H₂S, O₂, and LEL.
- Continuous monitoring with professional and accurate measurement.
- Sound, vibration, and flash triple alarms.
- Large HD LCD display with backlight for easy reading.
- Battery charging function.
- Low/high concentration alarm setting.
- Option to connect to a sampling pump for closed environments.
2.2 Components
Familiarize yourself with the main components of your ST8904 Gas Monitor:
- Llum d'alarma: Visual indicator for alarms.
- Panell de pantalla LCD: Shows gas concentrations, battery status, and other information.
- So d'alarma: Emits audible alerts.
- Confirmeu la clau: Used to confirm selections or settings.
- Power ON/OFF Key: Controla l'alimentació del dispositiu.
- Tecla amunt: Navigates menus or increases values.
- Tecla avall: Navigates menus or decreases values.
- Gas Pump Contact: Ports for connecting an external sampbomba de ling.
- Gas Sensor Windows: Areas where gas sensors are located.
2.3 Aplicacions
The ST8904 Gas Monitor is suitable for a wide range of industrial environments where gas detection is critical:
- Gas pipeline inspection
- Oil exploitation sites
- Tunnel construction
- Metallurgical industry
- Ship transportation
- Mining operations
- Plantes químiques
- Coal industry
- Les fàbriques de paper
- Seguretat contra incendis
- Municipal services
- Indústria tèxtil
3. Especificacions
| Paràmetre | Detall |
|---|---|
| Nom de marca | SENSOR INTEL·LIGENT |
| Número de model | ST8904 Gas tester |
| Tipus de gas | Multifunctional (CO, H₂S, O₂, LEL) |
| Tipus de sensor | Electrochemical Principle |
| Tipus de visualització | Segment type LCD with backlight |
| Rang de mesura (CO) | 0~999 ppm |
| Resolution (CO) | 1 ppm |
| Measurement Range (H₂S) | 0~500 ppm |
| Resolution (H₂S) | 1 ppm |
| Measurement Range (O₂) | 0~30 %VOL |
| Resolution (O₂) | 0.1% VOL |
| Measurement Range (LEL) | 0~100 %LEL |
| Resolution (LEL) | 1% LEL |
| Alerta d'alarma | Sound, Vibration, Flash triple alarms |
| Font d'alimentació | 3.7V Rechargeable BL-9C Lithium-ion Battery (Built-in) |
| Port de càrrega | Micro USB DC 5V |
| Battery Working Runtime | 6 hours (no alarm) |
| Corrent de funcionament | 230 mA |
| Humitat de funcionament | 15% ~ 95% HR |
| Temperatura de funcionament | -10 ℃ ~ 50 ℃ |
| Temperatura d'emmagatzematge | 0 ~ 40 ℃ |
| Mida de l'article | 140 * 75 * 35 mm / 5.51 * 2.95 * 1.37 polzades |
| Pes de l'article | 270 g / 9.52 oz |
4. Configuració
4.1 Contingut del paquet
Before use, verify that all items are present in the package:
- 1 x ST8904 4-in-1 Gas Detector
- 1 x cable USB
- 2 x cargols
- 1 x Gas Calibration Hood
- 1 x bossa d'emmagatzematge
- 1 manual d'usuari (anglès)
4.2 Càrrega del dispositiu
The ST8904 Gas Monitor comes with a built-in rechargeable BL-9C Lithium-ion battery. Before initial use, ensure the device is fully charged.
- Connect the provided USB cable to the Micro USB DC 5V charging port on the device.
- Connecteu l'altre extrem del cable USB a un adaptador de corrent USB compatible (no inclòs) o a un port USB de l'ordinador.
- The battery indicator on the LCD display will show charging status. Charge until the battery icon indicates a full charge.
4.3 Encès inicial
- Press and hold the Power ON/OFF Key until the LCD display illuminates.
- The device will perform a self-test and warm-up sequence. Wait for the device to stabilize and display gas readings.
5. Instruccions de funcionament
5.1 Funcionament bàsic
- Encès: Press and hold the Power ON/OFF Key.
- Apagar: Press and hold the Power ON/OFF Key until the device powers down.
- Seguiment: Once powered on and stabilized, the device continuously displays the real-time concentrations of CO, H₂S, O₂, and LEL on the LCD panel.
5.2 Funció d'alarma
The ST8904 features triple alarms (sound, vibration, and flash) that activate when gas concentrations exceed pre-set levels.
- Activador d'alarma: If any of the monitored gas concentrations (CO, H₂S, O₂, LEL) reach or exceed their configured alarm thresholds, the device will activate all three alarm types simultaneously.
- Alarm Acknowledgment: Refer to the full user manual for specific instructions on how to acknowledge or silence alarms, and how to clear alarm conditions.
- Configuració del valor d'alarma: The upper and lower limit alarm values can be customized. Additionally, Time-Weighted Average (TWA) and Short Term Exposure Limit (STEL) alarm values can be set. Consult the detailed manual for programming these settings using the Up, Down, and Confirm keys.
5.3 Connecting a Sampling Bomba
For monitoring in confined spaces or areas difficult to access, an external sampling pump (not included) can be connected to the Gas Pump Contact ports on the device. This allows for remote sampling of air.
- Ensure the device is powered off before connecting the pump.
- Connecteu el sampling pump's inlet to the desired sampling area and its outlet to the Gas Pump Contact ports on the ST8904.
- Power on the ST8904 and the sampling pump according to their respective instructions.
6. Manteniment
6.1 Neteja
- Netegeu l'exterior del dispositiu amb un damp tela. No utilitzeu netejadors abrasius ni dissolvents.
- Ensure the gas sensor windows are kept clean and free from obstructions.
6.2 Calibració
Regular calibration is crucial for maintaining the accuracy of your gas detector. Use the provided Gas Calibration Hood for this process.
- Refer to the detailed user manual for specific calibration procedures, including required calibration gases and steps.
- Perform calibration in a clean, fresh air environment or as recommended by the manufacturer.
6.3 Cura de la bateria
- Torneu a carregar el dispositiu quan l'indicador de bateria mostri que té poca bateria.
- Eviteu descarregar completament la bateria amb freqüència per allargar-ne la vida útil.
- If storing the device for an extended period, charge it to approximately 50% and recharge every few months.
6.4 Emmagatzematge
Store the ST8904 Gas Monitor in a dry environment within the recommended storage temperature range of 0~40℃ (32~104℉) when not in use.
7. Solució De Problemes
- El dispositiu no s'encén: Ensure the battery is fully charged. If the issue persists, contact support.
- No gas readings: Check if the sensor windows are clean and unobstructed. Ensure the device has completed its warm-up cycle.
- Falses alarmes: Ensure the device is operating in a clean environment for baseline readings. Check alarm threshold settings.
- Lectures inexactes: The device may require calibration. Refer to the calibration section or contact support.
- Problemes de visualització: If the LCD is not functioning correctly, try restarting the device. If the problem continues, contact support.
8. Consells d'usuari
- Always perform a quick functional check before each use to ensure the device is operating correctly.
- Keep the device away from strong electromagnetic fields, which can interfere with sensor readings.
- For critical applications, consider having a backup device or regularly cross-referencing readings with other calibrated equipment.
9. Garantia i Suport
For warranty information, technical support, or service inquiries regarding your SMART SENSOR ST8904 Gas Monitor, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
