1. Introduction
The TASI TA8408 Series Gas Leak Detector is a portable device designed for the detection of various volatile combustible gases. It features a highly sensitive sensor, quick response time, and provides both sound and light alarms to indicate gas presence. This manual provides essential information for the safe and effective use of your gas leak detector.
2. Package Contents
Please check the package contents upon receipt to ensure all items are present and undamaged:
- 1 x Gas Leak Detector (Host)
- 1 x Color Box
- 1 x Cloth Bag
- 1 x English Manual
3. Product Features
The TASI TA8408 Series Gas Leak Detector offers the following key features:
- Portable design for easy handling.
- High/low sensitivity switching for varied detection needs.
- Quick response time of less than 2 seconds.
- Highly sensitive semiconductor sensor.
- Concentration unit selection (for TA8408B/C models).
- Ability to detect multiple volatile combustible gases.
- VA color screen display.
- Sound and light alarm for clear indication of gas presence.
- Flexible goose neck hose (approximately 40cm or 15.74 inches).
- Low battery prompt.
- Automatic power off function.
4. Setup
4.1 Battery Installation (TA8408A/B)
- Locate the battery compartment cover on the back of the device.
- Open the cover.
- Insert three (3) 1.5V AAA batteries, ensuring correct polarity.
- Close the battery compartment cover securely.
4.2 Charging (TA8408C)
The TA8408C model features a built-in USB Lithium Direct Charge battery.
- Connect the provided USB cable to the charging port on the device.
- Connect the other end of the USB cable to a suitable USB power adapter (not included).
- The device will indicate charging status on the display.
4.3 Device Overview
Familiarize yourself with the main components and controls of your gas leak detector:
- Sensor: Located at the tip of the goose neck, detects gas.
- Goose Neck: Flexible probe for reaching confined spaces.
- LCD Display: Shows gas concentration, sensitivity level, and other indicators.
- Power Button: Turns the device on/off.
- SENS Button (Lo/Mid/Hi): Adjusts sensitivity level.
- PPM/%LEL Button (TA8408B/C): Switches between PPM and %LEL concentration units.
- C/F Button (TA8408B/C): Switches between Celsius and Fahrenheit for ambient temperature display.
- Speaker Icon Button (TA8408B/C): Toggles alarm sound on/off.
- ZERO Button: Initiates zero calibration.
5. Operating Instructions
5.1 Power On/Off
- Press and hold the Power Button to turn the device ON or OFF.
- Upon powering on, the device will undergo a warm-up period of approximately 30 seconds. The display will show "WAIT..." during this time.
5.2 Zero Calibration
- For TA8408A, the device performs auto zero calibration.
- For TA8408B/C, the device performs auto zero calibration upon startup. You can also perform manual zero calibration by pressing the "ZERO" button in a clean air environment.
5.3 Sensitivity Adjustment
- Press the "SENS" button to cycle through sensitivity levels: Low (Lo), Medium (Mid), and High (Hi).
- Higher sensitivity is suitable for detecting small leaks, while lower sensitivity helps to pinpoint larger leaks or avoid false alarms in environments with trace gases.
5.4 Gas Detection
- Ensure the device has completed its warm-up and zero calibration.
- Slowly move the sensor (goose neck tip) towards the suspected leak area.
- Observe the display and listen for the alarm. The response time is less than 2 seconds.
- The device will emit a sound and light alarm when gas is detected. The intensity of the alarm and the display reading will increase with higher gas concentration.
5.5 Display Interpretation (TA8408B/C)
The TA8408B/C models feature a digital analog bar display with specific alarm thresholds:
- SENS-H: High sensitivity, alarm when concentration is β₯ 1.00% LEL (500 PPM).
- SENS-L: Low sensitivity, alarm when concentration is β₯ 10.00% LEL (5000 PPM).
- %LEL: Lower Explosive Limit percentage.
- PPM: Parts Per Million, indicating a few percent of the leakage.
5.6 Unit Switching (TA8408B/C)
- Press the "PPM/%LEL" button to switch between Parts Per Million (PPM) and Lower Explosive Limit (%LEL) units for gas concentration display.
- Press the "C/F" button to switch between Celsius (β) and Fahrenheit (β) for ambient temperature display.
5.7 Alarm Sound On/Off (TA8408B/C)
- Press the Speaker Icon button to toggle the audible alarm sound on or off. The visual alarm will remain active regardless of the sound setting.
6. Maintenance
6.1 Cleaning
Wipe the device with a soft, damp cloth. Do not use abrasive cleaners or solvents. Ensure the sensor tip is kept clean and free from obstructions.
6.2 Storage
When not in use, store the device in its cloth bag in a cool, dry place. The recommended storage temperature is -10β to 60β (14β to 140β) with 20% to 80% relative humidity.
6.3 Battery Replacement (TA8408A/B)
When the low battery notice appears on the display, replace the AAA batteries as described in Section 4.1.
7. Troubleshooting
- Device does not power on: Check battery installation (TA8408A/B) or charge level (TA8408C). Ensure batteries are fresh and correctly inserted.
- No gas detection or inconsistent readings:
- Ensure the sensor tip is clean and unobstructed.
- Verify the device has completed its warm-up period.
- Perform zero calibration in a clean air environment.
- Adjust sensitivity to a higher level if detecting small leaks.
- Ensure the device is used within its specified operating environment.
- Alarm sounds continuously in clean air: Perform zero calibration in a fresh air environment.
8. Specifications
The following table details the technical parameters for the TASI TA8408 Series Gas Leak Detectors:
| Parameter | TA8408A | TA8408B | TA8408C |
|---|---|---|---|
| Display Range | Analog bar | 0~9999ppm / 0.00~20.00%LEL | 0~9999ppm / 0.00~20.00%LEL |
| Detection Gas | Acetone, acetylene, alcohol, ammonia, benzene, butane, ethanol, ethylene oxide, gasoline, ethane, hydrogen, methane, naphtha natural gas, paint thinner, propane, solvents, etc. | ||
| Accuracy | Β±10% FS (methane) | ||
| Sensitivity | οΌ50ppm (methane) | ||
| Response Time | οΌ2s | ||
| Warm-up Time | About 30s | ||
| Display Type | Analog bar | Digital analog bar | Digital analog bar |
| Alarm Mode | Sound and light alarm | ||
| Zero Mode | Auto zero | Auto and Manual zero | Auto and Manual zero |
| Unit Switching | Γ | β | β |
| Ambient Temp. Display | Γ | β | β |
| Alarm On/Off Function | Γ | β | β |
| High/Low Sensitivity Selection | β | ||
| Low Battery Notice | β | ||
| Auto Off | β | ||
| Goose Neck Hose | About 40cm | ||
| Working Environment | 0~50β / 20~80%RH | ||
| Storage Temperature | -10β~60β / 20~80%RH | ||
| Weight | About 420g (including battery) | ||
| Power Supply | 3*1.5V AAA battery | 3*1.5V AAA battery | USB Lithium Direct Charge |
| Product Size | 153x60x30mm | ||
9. User Tips
- Always perform a zero calibration in a fresh air environment before starting your detection work to ensure accurate readings.
- When searching for small leaks, use the high sensitivity setting and move the probe slowly to allow the sensor enough time to react.
- For pinpointing the exact source of a leak, start with high sensitivity to detect the general area, then switch to lower sensitivity to narrow down the location.
- Keep the sensor tip clean to prevent false readings or reduced sensitivity.
- Be aware of the auto-off function to conserve battery life.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided with your purchase documentation or contact the seller directly. Keep your purchase receipt as proof of purchase.
