BH-90E Portable Combustible Gas Leak Detector

1. Introduction

The Bosean BH-90E is a new generation portable combustible gas leak detector designed for accurate and reliable detection of gas leaks from pipelines and other sources. Featuring a flexible gooseneck probe, it offers enhanced convenience for detecting gas in confined or hard-to-reach spaces. This device utilizes an advanced semiconductor gas sensor, ensuring high sensitivity and a rapid response time to various combustible gases.

This manual provides essential information for the safe and effective use of your BH-90E detector, covering its features, operation, maintenance, and specifications.

2. Key Features

• Advanced Microprocessor Unit (MPU) technology for precise control.
• Low power consumption, extending battery life.
• Highly sensitive sensor with quick response and zero return capability.
• Comprehensive self-test and self-repair functions for operational integrity.
• Integrated battery voltage low alarm to prevent unexpected shutdowns.
• Multiple alarm indicators: Audio, visual LCD, vibratory, and light alarms.
• Adjustable alarm points to suit different detection requirements.
• Automatic zero adjustment function for quick and convenient setup.
• Intrinsically safe design for use in hazardous environments.
• Displays real-time temperature and humidity.
• Equipped with a lengthened flexible gooseneck probe for versatile detection.

3. Product Overview

Familiarize yourself with the components of your BH-90E detector:

• Flexible Gooseneck Probe: For reaching tight spaces.
• LCD Display: Shows gas concentration, battery status, temperature, humidity, and menu options.
• Control Buttons:
  • Up Arrow (▲): Navigates up in menus or increases values.
  • Power/Select (⏻): Powers the device on/off, confirms selections.
  • Down Arrow (▼): Navigates down in menus or decreases values.
• Alarm Indicators: Visual (LCD, light), audible, and vibratory alerts.

4. Setup and Initial Use

4.1 Charging the Battery

Before first use, fully charge the detector's 3.7VDC 1500mA rechargeable lithium battery. Connect the provided charger to the detector's charging port. The charging process typically takes approximately 6 hours. The display will indicate charging status.

4.2 Powering On/Off

• To Power On: Press and hold the Power/Select button (⏻) until the device powers on and performs a self-test.
• To Power Off: Press and hold the Power/Select button (⏻) until the device powers off.

Upon powering on, the device will perform a full-function self-test to ensure all systems are operational.

4.3 Initial Calibration (Zero Adjustment)

The BH-90E features an automatic zero adjustment function. For optimal accuracy, it is recommended to perform a zero adjustment in a clean, gas-free environment before each use or if you suspect readings are inaccurate.

• Ensure the detector is in a fresh air environment, free from any target gases.
• Navigate to the 'Gas zero' option in the menu using the Up/Down arrows and confirm with the Power/Select button.
• Follow on-screen prompts to complete the zero adjustment.

5. Operating Instructions

5.1 Basic Gas Detection

1. Power on the device as described in Section 4.2.
2. Allow the detector to warm up and stabilize (typically a few seconds after self-test).
3. Extend the flexible gooseneck probe to the area where a gas leak is suspected.
4. Slowly move the probe around the suspected leak source.
5. Observe the LCD display for gas concentration readings.
6. If gas concentration exceeds the set alarm point, the device will activate its audio, visual (LCD and light), and vibratory alarms.

5.2 Menu Navigation and Settings

The detector's menu allows for various configurations. Use the Up (▲) and Down (▼) arrow buttons to navigate through menu options and the Power/Select (⏻) button to select an option or confirm a setting.

• Gas zero: Performs zero adjustment (refer to Section 4.3).
• Gas calib: Initiates gas calibration. This should ideally be performed by trained personnel using certified calibration gas.
• Set: Accesses general settings.
• In Set: Accesses advanced settings.
• Unit set: Allows changing the measurement unit if applicable.

5.3 Adjusting Alarm Points

The alarm points (e.g., 200 ppm, 500 ppm) can be adjusted through the device's menu. Consult the 'Set' or 'In Set' menu options to modify these thresholds according to your specific safety requirements or local regulations.

5.4 Alarm Indications

• Vibratory Indicators: The device will vibrate.
• Light Alarm: LED lights on the device will flash.
• Display Alarm: The LCD screen will show an alarm message or change color.
• Audio Alarm: An audible alert (85dB at 1 meter) will sound.

6. Maintenance

• Cleaning: Wipe the exterior of the detector with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure the sensor opening is clear of dust and debris.
• Battery Care: Recharge the lithium battery regularly, especially if the low battery alarm activates. Avoid fully discharging the battery for extended periods to prolong its lifespan.
• Storage: Store the detector in a cool, dry place, away from direct sunlight and extreme temperatures (-20℃~60℃ operating range, but storage should be within a more moderate range). Ensure the storage environment is non-condensing (5~95%RH operating range).
• Calibration: Regular calibration is crucial for maintaining accuracy. While zero adjustment can be done by the user, full gas calibration should be performed periodically by qualified personnel.

7. Troubleshooting

• Device not powering on: Ensure the battery is charged. If fully charged and still not powering on, contact support.
• Low battery alarm: Recharge the device immediately.
• Inaccurate readings: Perform a zero adjustment in a clean air environment. If issues persist, the sensor may require professional calibration or replacement.
• No alarm response to gas: Check if alarm points are correctly set. Ensure the sensor opening is not obstructed.
• Device self-test failure: The device has a self-repair function. If it fails repeatedly, contact support.

8. Specifications

9. User Tips

• Regular Zeroing: Always perform a zero adjustment in a clean air environment before critical measurements to ensure baseline accuracy.
• Understand Alarm Levels: Familiarize yourself with the set alarm thresholds and what they signify in your working environment.
• Probe Handling: The gooseneck probe is flexible but avoid excessive bending or sharp angles to prevent damage.
• Environmental Awareness: Be mindful of temperature and humidity conditions, as extreme values can affect sensor performance.
• Battery Management: Keep the device charged. A low battery can impact sensor stability and measurement reliability.

10. Warranty and Support

The BH-90E Portable Combustible Gas Leak Detector comes with a 12-month warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use conditions.

For technical support, warranty claims, or service inquiries, please contact the manufacturer or your authorized dealer. Please have your product model and purchase details ready when contacting support.