Introduction
The LAMJAD D800 Breathalyzer is a professional alcohol tester designed for both personal and professional use. Equipped with advanced semiconductor sensors, it provides accurate and rapid blood alcohol concentration (BAC) results. Its digital LCD screen ensures clear readability, day or night, and includes a visual alert system for high alcohol levels. This manual provides comprehensive instructions for the proper setup, operation, and maintenance of your D800 Breathalyzer.
Package Contents
Upon opening the package, please verify that all items listed below are present and in good condition:
- 1 x Professional Breath Analyzer (LAMJAD D800)
- 1 x User Manual (English & German)
- 1 x Compact Carrying Case
- 10 x Reusable Mouthpieces

Image: The LAMJAD D800 Breathalyzer, along with its included 10 mouthpieces and compact carrying case, as seen in the product packaging.
Setup
Before first use, the device requires battery installation.
- Install Batteries: Locate the battery compartment on the back of the device. Insert two AAA batteries (not included) into the compartment, ensuring correct polarity. Close the battery cover securely.

Image: The rear view of the LAMJAD D800 Breathalyzer, illustrating the battery compartment where two AAA batteries are to be inserted.
- Attach Mouthpiece: Select one of the reusable mouthpieces and firmly attach it to the designated port on the side of the breathalyzer.
Operating Instructions
Follow these steps for accurate alcohol testing:
- Power On: Press and hold the START button to turn on the breathalyzer. The device will enter preheating mode, activating its semiconductor sensor.

Image: A step-by-step diagram illustrating the process of using the LAMJAD D800 Breathalyzer, from powering on to displaying results.
- Preheating: Wait for approximately 19 seconds during the preheating countdown. The screen will display "WAIT" and a countdown.
- Begin Test: Once preheating is complete, the device will prompt you to "BLOW". Place your mouth on the mouthpiece and blow continuously for 5-6 seconds.
- Result Display: If sampling is successful, you will hear two short beeps, and the test results will be displayed on the digital LCD screen within 10 seconds.
- Warning Function: If the detected alcohol concentration is above 0.25mg/L, the screen will flash red and blue lights alternately, similar to a police light, and an audible "Beep! Beep! Beep!" alarm will sound, reminding you to drive safely.

Image: The LAMJAD D800 Breathalyzer's LCD display, showing the warning function with visual and audible alerts for high alcohol levels.
- Review Test Records: The device can store up to 50 test records. To review them, hold the MODE key for 2 seconds to enter record memory mode. Press the MODE key repeatedly to cycle through the last 50 records. Note: Saved recordings are erased when the battery is removed.

Image: The LAMJAD D800 Breathalyzer displaying its test record review function, showing how to access and scroll through past measurements.
- Switch Measurement Units: At the test result display interface, short press the MODE key to switch between measurement units (mg/L, %BAC, ‰BAC). The next test result will be shown with the selected unit.

Image: The LAMJAD D800 Breathalyzer's display showing the option to switch between different measurement units for blood alcohol content.
Tips for Accurate Results:
- For more accurate results, it is recommended to repeat the test 2-3 times.
- Please rinse your mouth 20 minutes after drinking before conducting the test.
- It takes approximately 20 minutes for alcohol to be absorbed from the digestive system into the bloodstream. Testing too soon after consumption may yield inaccurate results.
Video: An official product video demonstrating the unboxing and initial setup of the LAMJAD D800 Breathalyzer.
Maintenance
Proper maintenance ensures the longevity and accuracy of your breathalyzer.
- Mouthpiece Cleaning: The included mouthpieces are reusable. After each use, it is recommended to clean them with mild soap and water, then rinse thoroughly and allow to air dry completely before storing or reusing.
- Device Cleaning: Wipe the exterior of the breathalyzer with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water.
- Storage: Store the breathalyzer in its compact carrying case in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Replacement: Replace batteries when the low battery indicator appears on the screen to ensure optimal performance.
Troubleshooting
If you encounter issues with your LAMJAD D800 Breathalyzer, please refer to the following common solutions:
- Device Not Powering On:
- Ensure batteries are inserted correctly with proper polarity.
- Replace old batteries with new AAA batteries.
- Inaccurate Readings:
- Ensure you have waited at least 20 minutes after consuming alcohol before testing.
- Blow continuously and steadily for the full 5-6 seconds as instructed.
- Repeat the test 2-3 times to confirm results.
- Ensure the mouthpiece is clean and properly attached.
- No Beep After Blowing:
- Ensure you are blowing continuously and with sufficient force for the required duration (5-6 seconds).
- Check if the mouthpiece is securely attached.
- Screen Not Displaying:
- Check battery installation and replace if necessary.
- Ensure the device is powered on by pressing and holding the START button.
If the problem persists after attempting these solutions, please contact LAMJAD customer support for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Model | D800 |
| Sensor Type | Semiconductor Sensor |
| Display | Digital LCD Screen with Backlight |
| Power Source | 2 x AAA Batteries (not included) |
| Test Time | Results within 10 seconds |
| Record Storage | Up to 50 test records |
| Mouthpieces | 10 Reusable Mouthpieces |
| Dimensions | 6.1 x 3.19 x 2.13 inches (Package) |
| Weight | 5.29 ounces (Package) |

Image: The LAMJAD D800 Breathalyzer shown with its approximate dimensions for size reference.
Warranty and Support
LAMJAD is committed to providing excellent service and support for its products.
- Customer Service: If you find the instrument is damaged or any accessories are missing upon arrival, or if you have any questions or concerns regarding your LAMJAD D800 Breathalyzer, please do not hesitate to contact us.
- Contact Information: Please refer to the contact details provided in the included User Manual or visit the official LAMJAD website for support. We aim to reply to all inquiries within 24 hours.