1. Introduction
This manual provides detailed instructions for the safe and effective use of the SMART SENSOR AS8800C Digital Combustible Gas Detector. Please read this manual thoroughly before operation and keep it for future reference. This device is an intellectual precise measurement apparatus designed for detecting various combustible gases.
For a complete digital version of this manual, please refer to the User Manual (PDF).
2. Product Overview
The AS8800C is a portable detector equipped with a long, flexible stainless probe for reaching various areas. It features an audible semiconductor probe, auto fast warm-up, instant response, pinpoint leak position indication, and low battery indication. It also provides audio and visible leakage alarm indications with adjustable sensitivity.
2.1. Device Components
- LCD Display
- On/Off Button
- Mode Button
- Backlight Adjustment Knob
- Low Alarm Indicator
- High Alarm Indicator
- Flexible Coil
- Alarm Volume/Adjustment Knob
- Unit Selection
- Sensor Probe
- Alarm Buzzer
2.2. Display Description
- Measured Readings
- Gas Unit
- Gas Type
- Alarm Sound Indication
- Temperature Unit
- Temperature Readings
- Backlight Indication
- Battery Indication
3. Setup
3.1. Battery Installation
The device requires 3 x 1.5V AA batteries (not included). To install:
- Open the battery door located on the back of the device.
- Insert three 1.5V AA batteries, ensuring correct polarity.
- Close the battery door securely.
4. Operating Instructions
4.1. Power On/Off
- **Power On**: Press the 'Power' button (
). The system will initiate a preheat process with a countdown on the display. Measurement will be ready after the countdown finishes. Pressing the power button during the countdown can skip the warm-up state. - **Power Off**: Press and hold the 'Power' button until the device turns off.
4.2. Backlight On/Off
Press the 'Light' button () to switch the backlight on or off.
4.3. Alarm Buzzer On/Off
Press the 'Volume' button () to toggle the buzzer on and off. A 'Buzzer Symbol' will be displayed on the screen when the buzzer is active.
4.4. Switching Temperature Unit
Press the 'UNIT' button to switch the temperature unit between Celsius (°C) and Fahrenheit (°F).
4.5. Gas Unit Selection
Depress and hold the 'UNIT' button to select the gas unit between LEL and PPM sequentially. The corresponding unit icon will display on the LCD panel.
4.6. Activate/Deactivate Auto Power Off Function
Press and hold the 'MODE' button under normal measuring mode until the "Alarm setup" mode is displayed. You will see "APO" and flickering "ON" (or "OFF"). Press the 'Up' and 'Down' buttons to switch the function on or off. "OFF" means the Auto Power Off Function is deactivated, and "ON" means it is activated (auto turn off in 10 minutes without operation). Press 'MODE' to exit setup or 'Power' button to return to normal measuring mode.
4.7. Alarm Setting
Under normal measuring mode, press the 'MODE' button to enter the Alarm Setting mode. Follow these steps:
- **Class 1 Alarm Setup (AL1)**: Use the 'Up' and 'Down' buttons to adjust the alarm value. Press the 'MODE' button to switch between digits for adjustment.
- **Class 2 Alarm Setup (AL2)**: Press 'MODE' again to switch to Class 2 Alarm Value setup, then adjust as in Step 1.
- **Finish Setup**: Press 'MODE' once more to save settings and return to normal measuring mode.
5. Maintenance
- **General Care**: This meter is a precise measurement apparatus. To avoid damage, keep it away from water and hot objects (above 50°C).
- **Battery Replacement**: When the battery indicator 'Battery Icon' appears on the LCD display, please replace the three 1.5V AA batteries promptly.
- **Long-Term Storage**: If the meter will not be used for an extended period, turn off the instrument and remove the batteries to prevent battery exudates from causing damage.
- **Sensor Protection**: The sensor is a consumptive material. Protect it and keep it clean. The sensor cannot be repaired and is not covered by warranty.
- **Power Saving**: For prolonged use, consider turning off the backlight to conserve power and extend battery life.
6. Troubleshooting
- **Low Battery Indication**: If the battery icon appears, replace the batteries immediately to ensure accurate readings and proper device function.
- **Inaccurate Readings**: Ensure the sensor is clean and free from obstructions. Avoid using the device in extreme temperatures or high humidity.
- **No Power**: Check battery installation and ensure batteries are fresh.
- **No Alarm**: Verify that the alarm buzzer is turned on (check for the 'Buzzer Symbol' on the screen) and that alarm values are set appropriately.
7. Specifications
| Parameter | Value |
|---|---|
| Brand Name | SMART SENSOR |
| Model Number | AS8800C |
| Gas Type | Combustible Gas |
| Measurement Range | 0-20% LEL / 0-10000 PPM |
| Resolution | 0.1% LEL / 1 PPM |
| Accuracy | ±5% LEL |
| Low Alarm Setting | Alarm value 8% LEL (CH4) |
| High Alarm Setting | Alarm value 15% LEL (CH4) |
| Temperature Range | -10°C to 50°C |
| Response Time | T90 < 10 seconds |
| Recovery Time | < 30 seconds |
| Measuring Principle | Semiconductor |
| Display | Large LCD display |
| Alarm | Sound, Light alarm |
| Power | 3 x 1.5V AA battery (Not included) |
| Operation Temperature | -10°C to 50°C; < 95% RH (Non Gel) |
| Is Smart Device | Yes |
| DIY Supplies | Electrical |
| Certification | CE, FCC |
7.1. Explosion Limits of Common Combustible Gases
| Substance | Chemical Formula | Lower Limit (LEL) (V%) | Upper Limit (UEL) (V%) |
|---|---|---|---|
| Methane | CH4 | 5 | 15 |
| Ethane | C2H6 | 3 | 15.5 |
| Propane | C3H8 | 2.1 | 9.5 |
| Butane | C4H10 | 1.9 | 8.5 |
| Gasoline (Liquid) | C4-C12 | 1.1 | 5.9 |
| Kerosene (Liquid) | C10-C16 | 0.6 | 5 |
| Town Gas | 4 | ||
| LPG | 1 | 12 | |
| Turpentine (Liquid) | C10-H16 | 0.8 |
8. Warranty and Support
8.1. Warranty Information
The SMART SENSOR AS8800C comes with a 24-month manufacturer's limited warranty for defective items (excluding items damaged and/or misused after receipt). Accessories typically come with a 3-month warranty.
Defective items MUST be reported and returned within the warranty period (and in the original packaging, if possible). The defect and order number must be provided. Repairs or replacements are not provided for items with an expired warranty.
8.2. General Statement
The manufacturer reserves the rights to upgrade and amend the design of the product as well as the manual updating. The product is subject to change without any further notification.
Dispose of batteries in accordance with local laws and regulations.
9. User Tips
- **Regular Checks**: Periodically test the detector in a known gas environment (e.g., near a gas stove with a small leak) to ensure it is functioning correctly.
- **Environmental Awareness**: Be aware that extreme temperatures or high humidity can affect sensor performance. Always use the detector within its specified operating temperature and humidity ranges.
- **Probe Handling**: The flexible probe allows access to hard-to-reach areas. Handle it carefully to avoid bending or damaging the sensor tip.
- **Calibration**: While not explicitly mentioned for user calibration, maintaining the sensor's cleanliness is crucial for its accuracy over time.
