BOSEAN Portable 4-in-1 Multi-Gas Detector BH-4A User Manual

1. ആമുഖം

The BOSEAN BH-4A is a portable 4-in-1 multi-gas detector designed to monitor the concentration of carbon monoxide (CO), combustible gases (LEL), hydrogen sulfide (H2S), and oxygen (O2) in the ambient environment. This device features high-precision industrial-grade sensors, stable performance, and simple operation, providing real-time detection and historical alarm data display. Its robust design ensures suitability for various harsh environments.

2. ഉൽപ്പന്ന സവിശേഷതകൾ

• Multiple Gas Detection: Simultaneously detects Carbon Monoxide (CO), Combustible Gas (LEL), Hydrogen Sulfide (H2S), and Oxygen (O2).
• Triple Alarm System: Features high-decibel buzzer alarms with three modes: sound, light, and vibration for enhanced safety.
• ഉയർന്ന കൃത്യത അളക്കൽ: Equipped with industrial-level sensors for high accuracy and stability, offering real-time detection and historical alarm data display.
• മോടിയുള്ള ഡിസൈൻ: IP65 rated for complete dust and water protection, and explosion-proof (Exib IIB T3 Gb) for use in challenging environments.
• വലിയ ശേഷിയുള്ള ബാറ്ററി: Powered by a rechargeable 3.7V 1800mAh lithium battery, providing over 8 hours of continuous operation.

3. ഉപകരണ ഘടകങ്ങൾ

ചിത്രം 3.1: മുന്നിലും പിന്നിലും view of the BOSEAN BH-4A Multi-Gas Detector. Key components include the LCD display, power button, navigation buttons, sensor holes, USB charging port, and back clip.

Figure 3.2: Close-up of the LCD panel, displaying gas concentrations and device status.

Figure 3.3: The sturdy back clip allows for easy attachment to clothing or belts for portable use.

Figure 3.4: The gas detection sensor hole, where ambient air is drawn in for analysis.

4. സജ്ജീകരണം

4.1. പ്രാരംഭ ചാർജിംഗ്

Before first use, ensure the device is fully charged using the provided USB cable. The charging port is located on the side of the device. A full charge typically takes several hours.

Figure 4.1: USB charging socket for recharging the device's internal battery.

5. പ്രവർത്തന നിർദ്ദേശങ്ങൾ

5.1. പവർ ഓൺ/ഓഫ്

To power on the device, press and hold the power button for more than 2 seconds. The device will undergo a startup calibration sequence, which may take a few moments. Ensure you are in a gas-free environment during startup. To power off, press and hold the power button until you hear three beeps and the display shows 'OFF'.

5.2. ഓട്ടോമാറ്റിക് പവർ ഓഫ്

The device features an automatic power-off function. If no operation is performed for 10 minutes, the device will automatically shut down to conserve battery. This feature can be toggled ON/OFF in the settings menu. When ON, a circular icon is displayed on the screen.

5.3. ബാക്ക്ലൈറ്റ് നിയന്ത്രണം

In normal operating mode (SCAN), press the 'back' button to toggle the display backlight ON or OFF.

5.4. മെഷർമെൻ്റ് മോഡുകൾ

The device supports several measurement modes: Normal (SCAN), Peak Value (P.VALUE), Time-Weighted Average (TWA), and Short-Term Exposure Limit (STEL). Use the 'down' button to cycle through these modes in the following order: SCAN → P.VALUE → TWA → STEL → SCAN.

5.5. Alarm Operation

When gas concentration approaches a set alarm threshold, the numerical value will flash, and the device will activate its triple alarm (sound, light, and vibration) to notify the user. The alarm will cease once the concentration returns to a safe level.

5.6 അലാറം ക്രമീകരണങ്ങൾ

To access alarm settings, press and hold the 'up' button in normal operating mode (SCAN). You can then navigate through different alarm thresholds (ALM.L for low, ALM.H for high, TWA ALM., STEL ALM.) using the navigation buttons. Select the desired gas using the 'back' button, then adjust the alarm value using the 'up' (increase) and 'down' (decrease) buttons. Confirm the setting by pressing the 'power' button. Repeat for other gases as needed. Exit the alarm setting mode by pressing the 'power' button to return to measurement mode.

5.7. ഭാഷാ മാറ്റം

The device supports both English and Japanese languages. Refer to the settings menu to switch between languages. This is typically found under a 'Language' or 'Lan' option within the system settings.

Figure 5.1: Instructions for changing the display language between English and Japanese.

6. പരിപാലനം

6.1. കാലിബ്രേഷൻ

The device uses industrial-grade sensors that require periodic calibration to maintain accuracy. Calibration should ideally be performed by qualified personnel or according to manufacturer guidelines. The calibration setting is password-protected to prevent accidental changes.

6.2. വൃത്തിയാക്കൽ

ഒരു സോഫ്റ്റ്, ഡി ക്ലീനർ ഉപയോഗിച്ച് ഉപകരണം പതിവായി വൃത്തിയാക്കുക.amp തുണി. അബ്രാസീവ് ക്ലീനറുകളോ ലായകങ്ങളോ ഉപയോഗിക്കരുത്, കാരണം ഇവ സി.asing or sensors. Ensure the sensor openings are free from dust and debris.

6.3. സംഭരണം

Store the device in a cool, dry place away from direct sunlight and extreme temperatures. When storing for extended periods, ensure the battery is partially charged (around 50%) and recharge periodically to prevent deep discharge.

7. പ്രശ്‌നപരിഹാരം

8 സാങ്കേതിക സവിശേഷതകൾ

9. വാറൻ്റിയും പിന്തുണയും

For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase. Note that sensor replacement parts may not be readily available, and the device may have a limited operational lifespan for its sensors (e.g., 2 years).