1. Introduction
The BW Technologies GasAlertMax XT II is a robust, handheld four-gas detector designed for monitoring ambient levels of Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Oxygen (O2), and combustible gases. This device is essential for personal safety in various occupational settings, including petroleum refineries, tanneries, sewage treatment facilities, and paper mills.
Key features include:
- Continuous monitoring of H2S, CO, O2, and combustible gases.
- Simultaneous audio, visual, and vibration alarms for gas detection.
- Integrated diaphragm pump for localized atmospheric sampling.
- Alphanumeric LCD screen displaying real-time gas concentrations, alarm types, and device status.
- Single push-button operation for ease of use.
- Data logging capability for the 10 most recent gas exposure events.
- Powered by a replaceable AA alkaline battery.
- Automatic self-tests for sensor integrity, circuitry, and alarms.
- Durable, concussion-proof housing with an IP 66/67 rating for water resistance.
- CE and ATEX certified, UL classified as Intrinsically Safe Apparatus.
Figure 1: The image displays the yellow BW Technologies GasAlertMax XT II 4-Gas Detector, its power adapter, two clear sampling tubes, a small screwdriver, and a filter, representing the complete product package.
2. Setup
2.1 Battery Installation
- Ensure the device is powered off.
- Locate the battery compartment on the back of the detector.
- Open the compartment and insert one AA alkaline battery, ensuring correct polarity.
- Securely close the battery compartment. The battery provides approximately 14 hours of operational life.
2.2 Initial Power-On and Self-Test
Upon activation, the GasAlertMax XT II performs an automatic self-test to verify its functionality. This includes:
- Sensor integrity check.
- Circuitry verification.
- Audible and visual alarm functionality test.
- Battery level assessment.
The device will display the results of these tests on the LCD screen. A constant flashing heartbeat icon indicates normal functioning after the self-test is complete.
3. Operating Instructions
3.1 Display Information
The alphanumeric LCD screen provides critical information:
- Real-time Gas Concentrations: Displays current levels for H2S, CO, O2, and combustible gases.
- Alarm Type: Indicates the specific type of alarm triggered.
- Calibration Requirements: Notifies when calibration is due.
- Self-Test Status: Shows pass or fail status of internal diagnostics.
- Battery Life: Indicates remaining battery power.
- Heartbeat Icon: A flashing icon confirms normal operation.
3.2 Single Button Operation
The device is operated and adjusted using a single push button. Refer to the detailed operational guide for specific button press sequences for menu navigation, calibration, and other functions.
3.3 Alarm System
The GasAlertMax XT II features a comprehensive alarm system to alert users to potentially hazardous gas levels:
- Audible Alarm: A 95 dB alarm sounds at varying speeds to indicate the alarm type.
- Visual Alarm: Three bright, wide-angled LED alarm bars provide clear visual alerts.
- Vibration Alarm: A built-in vibration alarm is crucial in high-noise environments.
Alarms are triggered when gas levels reach any of four preset limits:
- Low-Alarm Level: Indicates moderate danger.
- High-Alarm Level: Indicates significant danger.
- Short-Term Exposure Limit (STEL): Maximum concentration for short, continuous exposure without serious risk.
- Time-Weighted Average (TWA) Limit: Maximum average exposure over an eight-hour shift without serious risk.
3.4 Data Logging
The detector automatically logs and retains data for the 10 most recent gas exposure events. This data can be transmitted to a personal computer via an infrared Datalink USB adapter (sold separately) for analysis and record-keeping.
4. Maintenance
4.1 Regular Self-Tests
The detector continuously performs self-tests during operation to ensure sensor integrity, circuitry, and alarm functionality. An automatic shutdown mode activates if the detector fails its self-test, indicating a need for immediate attention.
4.2 Calibration and Bump Testing
Periodic calibration and bump testing are essential to maintain the accuracy and reliability of the gas detector. The GasAlertMax XT II is compatible with the BW Technologies MicroDock II automatic test system (sold separately) for streamlined testing and calibration procedures.
4.3 Battery Replacement
Replace the AA alkaline battery when the low battery indicator appears on the LCD screen or when operational life diminishes. Always use approved battery types.
4.4 Cleaning and Storage
Clean the exterior of the detector with a damp cloth. Do not use abrasive cleaners or solvents. Store the device in a clean, dry environment within the specified temperature range when not in use.
5. Troubleshooting
This section addresses common issues you might encounter with your GasAlertMax XT II detector.
- Device Shuts Down Automatically: If the detector activates its automatic shutdown mode, it indicates a failure during a self-test. This requires immediate investigation. Check sensor connections, battery level, and consider a full calibration or service.
- No Display/Device Not Powering On: Ensure the AA alkaline battery is correctly installed and fully charged. Replace the battery if necessary.
- Inaccurate Readings: Inaccurate gas readings often indicate a need for calibration or a faulty sensor. Perform a bump test and, if necessary, a full calibration. If issues persist, sensor replacement may be required.
- Alarms Not Functioning: During the initial self-test, the device checks alarm functionality. If alarms (audible, visual, or vibration) are not working, the device may require service. Do not use the detector if alarms are non-functional.
- Pump Malfunction: If the integrated pump is not drawing samples effectively, check for blockages in the sampling tube or filter. Ensure the tube is securely connected.
For issues not covered here, or if troubleshooting steps do not resolve the problem, contact BW Technologies customer support or an authorized service center.
6. Specifications
| Feature | Detail |
|---|---|
| Gas Types Detected | Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Oxygen (O2), Combustible Gases (%LEL) |
| Measuring Range (H2S) | 0 to 200 ppm |
| Measuring Range (CO) | 0 to 1,000 ppm |
| Measuring Range (O2) | 0 to 30% |
| Measuring Range (Combustible) | 0 to 100% LEL, 0 to 5% v/v |
| Resolution (H2S) | 1.0 ppm |
| Resolution (CO) | 1.0 ppm |
| Resolution (O2) | 0.1% |
| Resolution (Combustible) | 1% LEL, 0.1% v/v |
| Temperature Range | -4 to +122 ℉ (-20 to +50 ℃) |
| Humidity Range | 10% to 100% RH (non-condensing) |
| Audible Alarm Sound Level | 95 dB |
| Dimensions (H x W x D) | 5.1 x 3.2 x 1.9 inches (13.0 x 8.1 x 4.7 cm) |
| Weight | 11.92 oz. (338 g) |
| Battery Type | AA alkaline (1 required) |
| Battery Life | Up to 14 hours (at +68 to 122 ℉ / +20 to 50 ℃) |
| Ingress Protection (IP) Rating | IP 66/67 |
| Certifications | CE, ATEX, UL Intrinsically Safe (Class I, Division I, Group A, B, C, D) |
7. Warranty & Support
7.1 Warranty Information
Specific warranty details for the BW Technologies GasAlertMax XT II are typically provided with the product packaging or can be obtained directly from BW Technologies or an authorized distributor. Please retain your proof of purchase for warranty claims.
7.2 Customer Support
For technical assistance, service, or inquiries regarding your GasAlertMax XT II detector, please contact BW Technologies customer support. Contact information can usually be found on the manufacturer's official website or in the product documentation.
