Bosean BH4A 4-in-1 Multi Gas Detector User Manual

1. Introduction

The Bosean BH4A is a robust and reliable 4-in-1 multi-gas detector designed for industrial applications. It is capable of simultaneously detecting Oxygen (O2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S), and Combustible Gases (LEL). Developed by Bosean, a company specializing in gas detection since 2013, this device adheres to high-quality standards including ISO9001, CE, ATEX, and ROHS certifications.

The BH4A is engineered for ease of use, featuring a lightweight body, one-hand control, and a high-strength ABS case. It is suitable for continuous monitoring in various environments, including pipelines, gas stations, and narrow spaces.

2. Product Features

• High-Quality Sensors: Equipped with electrochemical sensors (made in the UK) for O2, CO, and H2S, and a catalytic combustion sensor for LEL. Factory calibrated for immediate use.
• Accurate Detection: Detection error better than ≤±5% F.S. with a rapid response time of T<30s. Supports zero and span calibration.
• Multiple Alarm Methods: Features adjustable audio, visual (light), and vibration alarms that activate when preset gas levels are reached. Alarm events are digitally time-stamped and logged.
• Durable Construction: Robust design with a high-strength ABS case and anti-slip grip rubber. It is waterproof, dust-proof, and explosion-proof, exceeding Exib IIB T3 Gb standards.
• User-Friendly Display: 2.4-inch HD display for clear readings.
• Long Battery Life: Powered by a built-in 3.7V rechargeable lithium battery (2000 mAh) providing 6-8 hours of continuous operation. The battery supports approximately 800 charge cycles.
• Portable Sampling Pump (BH-GSP): Newly designed portable sampling pump with features like anti-shaking, anti-striking, easy installation, good air-proof, and indications for pump jam, power, and low voltage.

3. Components and Package Contents

The standard package for the Bosean BH4A Multi Gas Detector includes the following items:

• 1 x BH4A 4-in-1 Multi Gas Monitor
• 1 x English User Manual
• 1 x Charging Adaptor
• 1 x USB Charging Cable
• 1 x Calibration Cover
• 1 x Metal Aluminum Box (for storage and transport)
• 1 x Certificate

4. Specifications

4.1. BH4A Gas Detector Specifications

4.2. BH-GSP Sampling Pump Specifications

5. Setup

5.1. Initial Charging

Before first use, fully charge the BH4A detector using the provided charging adaptor and USB cable. The charging time is typically less than 7 hours. The USB charging port is located on the device as shown in Figure 6.

5.2. Connecting the Sampling Pump

For applications requiring gas sampling from remote or confined areas, connect the BH-GSP sampling pump to the detector. The pump connects via a tube to the detector's sampling inlet. Ensure a secure connection for accurate readings.

6. Operation

6.1. Power On/Off

Press and hold the power button (usually marked with a circle and vertical line) to turn the device ON or OFF. The device is factory calibrated and ready for use upon powering on.

6.2. Gas Detection

Once powered on, the device will automatically begin detecting the four specified gases (O2, CO, H2S, LEL). Real-time concentrations will be displayed on the 2.4-inch HD LCD screen. Ensure the sensor area is exposed to the environment to be monitored, or use the sampling pump and probe for remote detection.

6.3. Navigating Menus and Settings

Use the Up and Down arrow buttons to navigate through menu options. The Power/OK button is used to select options and confirm settings. Refer to the detailed English User Manual included in the package for advanced menu navigation, zero calibration, and span calibration procedures.

7. Alarms

The BH4A detector provides comprehensive alarm indications to alert users of hazardous gas concentrations. It features two alarm concentration values (low and high) and three distinct alarm prompts:

• Light Alarm: A flashing light indicator on the device.
• Sound Alarm: An audible alarm, adjustable up to 80dB.
• Vibration Alarm: The device vibrates to provide a tactile alert.

These alarms are triggered when gas concentrations exceed the preset low or high alarm thresholds. Users can adjust these alarm values through the device's menu settings to suit specific safety requirements.

8. Maintenance

Proper maintenance ensures the longevity and accuracy of your Bosean BH4A gas detector.

• Regular Cleaning: Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning. Do not use harsh chemicals or abrasive materials.
• Sensor Care: The sensors have a typical lifetime of 2 years. Regular calibration is crucial to maintain accuracy. Use the provided calibration cover for calibration procedures as detailed in the user manual.
• Battery Maintenance: Recharge the battery when the low voltage indicator appears. Avoid fully discharging the battery frequently to prolong its lifespan.
• Storage: When not in use for extended periods, store the device in its metal aluminum box in a cool, dry place, away from direct sunlight and extreme temperatures.

9. Troubleshooting

• No Power/Device Not Turning On: Ensure the battery is sufficiently charged. Connect the device to the charger and allow it to charge for at least 30 minutes before attempting to power on again.
• Inaccurate Readings: Perform a zero and span calibration as described in the user manual. Ensure the sensors are clean and unobstructed. If readings remain inaccurate, the sensors may need replacement.
• Pump Jam Indication: If the BH-GSP sampling pump indicates a jam, check the probe tube for any blockages or kinks. Ensure the inlet is clear.
• Low Voltage Indication: Recharge the device immediately. Continuous operation on low voltage can affect accuracy and battery life.

10. User Tips

• Gas Detection Capabilities: The BH4A detector is designed to measure Oxygen (O2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S), and Combustible Gases (LEL). It does not measure Carbon Dioxide (CO2) or Volatile Organic Compounds (VOCs).
• Calibration: Regular calibration is essential for maintaining the accuracy of your gas detector, especially in critical applications. Follow the calibration instructions in the full user manual.
• Environmental Conditions: While the device is robust, avoid exposing it to extreme conditions beyond its specified operating temperature and humidity ranges to ensure optimal performance and longevity.
• Language: The device's interface is primarily in English. For specific language requirements, please contact Bosean support.

11. Warranty and Support

Bosean stands behind the quality of its products. The BH4A Multi Gas Detector comes with standard certifications including CE and FCC, ensuring compliance with relevant safety and performance standards.

For any technical assistance, warranty claims, or inquiries regarding customization services, please contact Bosean customer support. Refer to the contact information provided in your product packaging or on the official Bosean website.