NRS AT 818 - User Manual

3
The table of comparison for Alcohol in Blood between the mg/L and BAC
The level of Alcohol display in BAC
0.00%
The level of Alcohol display in mg/L
0.01 0.05
0.02 0.10
0.04 0.20
0.05 0.25
0.06 0.30
0.08 0.40
0.11 0.55
0.12 0.60
0.14 0.70
0.16 0.80
0.18 0.90
0.20 1.00
General Introduction
AT-818 breath alcohol tester is kind of tester
designed to measure concentration result of
the breathed alcohol in the human body. This
device adopts advanced NM Hot-wire alcohol
sensor which has excellent sensitivity and
reproducibility, fashion and portable design
make it more convenient for personal use.
When the alcohol content exceeds the preset
limited level, this device would send an audio
and video warning to remind your safety.
Main Feature:
Advanced NM Hot-wire alcohol sensor
Quick response
SMD assembling, stable performance
Smart MCU control
Direct testing process LCD indication
Digital LCD display with light blue backup
Portable and fashion design
Audio warning beyond pre-set limit
Sensor Fault Self checking
Battery saved design, low voltage indication
Technical Data
Sensor type : NM Hot-wire alcohol sensor
Detection Range : 0.000～0.199%BAC; 0.00～1.99‰BAC; 0.00～0.99mg/L
Alarming Level : 05%BAC, 0.25mg/L; 0.5‰BAC
Accuracy : ±10% F.S
Response Time : ＜5s Warm-up Time: ＜20s Resume Time: ≤20s
Working Voltage : DC4.5V（3×AAA）Batteries; Working Current: ≤120mA
Working Environment : Temperature -10～50 Relative Humidity ≤95% No Dews
Display : 3 digitals LCD display with blue backlight
Dimension : 103×65×27mm (L×W×H), ≤64 g Battery excluded
Battery expectancy time : ≥200Times
ALCOHOL TESTER
MODEL: AT 818

Summary

General Introduction

Main Features

Technical Data

Structure and Function Guide

Structure Guide Picture

Visual guide detailing the physical components and layout of the alcohol tester device.

Operation Instructions

Battery Installation and Power On

Instructions for inserting batteries and powering on the device, including initial warm-up.

Testing Procedure

Steps for performing a breath alcohol test, including blowing into the mouthpiece and reading results.

Unit Switching

Guidance on how to change the displayed unit of measurement for the test results.

Device Behavior and Indicators

Explanation of device features like auto power-off, low battery indication, and sensor fault detection.

Notifications and Precautions

General Handling and Environmental Advice

Advisories on avoiding physical shock, exposure to gases, and extreme temperatures for optimal performance.

Testing Environment and Accuracy

Recommendations for testing conditions, waiting periods after drinking, and potential factors affecting accuracy.

Sensor Lifespan and Maintenance

Information on the typical lifespan of the alcohol sensor and cleaning recommendations.

Common Faults and Solutions

Troubleshooting LCD Display Issues

Solutions for 'NO display on LCD' including checking battery installation.

Troubleshooting Detection Failures

Solutions for 'No response to detection gas' and 'FFF display' errors.

Troubleshooting Low Battery and Sensor Errors

Solutions for 'Low voltage display' and 'Sensor fault' indicators.

Overview

1. Alcohol Tester Model AT-818
   1. Technical Specifications
   2. Usage Features
   3. Maintenance Features

Alcohol Tester Model AT-818

The AT-818 is a breath alcohol tester designed to measure the concentration of alcohol in a person's breath. It utilizes an advanced NM Hot-wire alcohol sensor, known for its excellent sensitivity and reproducibility. The device features a fashion-forward and portable design, making it convenient for personal use. When the detected alcohol content exceeds a preset limit, the AT-818 provides both audio and video warnings to alert the user for their safety.

Technical Specifications

Sensor Type: NM Hot-wire alcohol sensor Detection Range:

• 0.000~0.199% BAC
• 0.00~1.99% BAC
• 0.00~0.99 mg/L Alarming Level:
• 0.05% BAC
• 0.25 mg/L
• 0.5% BAC Accuracy: ±10% F.S Response Time: < 5 seconds Warm-up Time: < 20 seconds Resume Time: ≤ 20 seconds Working Voltage: DC 4.5V (3×AAA Batteries) Working Current: ≤ 120mA Working Environment:
• Temperature: -10 ~ 50 ℃
• Relative Humidity: ≤ 95% (No Dews) Display: 3-digit LCD display with blue backlight Dimension: 103×65×27mm (L×W×H) Weight: ≤ 64 g (Battery excluded) Battery Expectancy Time: ≥ 200 Times

Usage Features

The AT-818 is designed for straightforward operation with several user-friendly features:

• Quick Response: The device provides rapid results, ensuring efficiency.
• Smart MCU Control: Intelligent microcontroller unit (MCU) control enhances performance and accuracy.
• Direct Testing Process LCD Indication: The LCD clearly guides the user through the testing process.
• Digital LCD Display with Light Blue Backlight: Ensures readability in various lighting conditions.
• Portable and Fashion Design: Its compact and stylish design makes it easy to carry.
• Audio Warning Beyond Pre-set Limit: Provides an audible alert when alcohol levels exceed safe limits.
• Low Voltage Indication: Alerts the user when batteries are running low, prompting replacement.
• Unit Switch: Users can change the display unit between % BAC, % BAC, and mg/L after a test result is shown by pressing the power button.

Operating Instructions:

1. Battery Installation: Slide down the battery compartment, insert 3 AAA 1.5V batteries according to polarity, and close the compartment.
2. Power On & Warm-up: Press the power button for 1 second. The LCD will display "warm up" for 20 seconds, followed by a "beep" sound and "blow" indication, signaling readiness for testing.
3. Blowing: Blow directly into the mouthpiece for 4 seconds until a "beep" sound indicates to stop. The test result will then be displayed on the LCD.
4. Auto Power Off: The tester automatically powers off after 20 seconds of displaying the test result to conserve battery life.
5. New Testing: To initiate a new test, press the switch button again and repeat the process from step 2.

Maintenance Features

The AT-818 incorporates features to ensure its longevity and reliable performance:

• SMD Assembling, Stable Performance: Surface-mount device (SMD) assembly contributes to stable and consistent performance.
• Sensor Fault Self-checking: Upon power-on, the tester automatically checks the sensor's mode. If an abnormality is detected, the device attempts to repair it (within approximately 10 seconds). If repair is not possible, "ER" will be displayed on the LCD.
• Battery Saved Design: Optimized power consumption extends battery life.
• Cleaning: After prolonged use, if dirt accumulates on the tester, it should be wiped with a clean cloth. Avoid using hard objects or solvents with corrosive ingredients.
• Sensor Life: Under normal detection conditions, the sensor is expected to last more than two years.

Troubleshooting Guide:

• NO display on LCD:
  • Possible Reason: Incorrect battery installation or seriously low battery.
  • Solution: Insert batteries correctly according to polarity or replace with new batteries.
• No response to detection gas:
  • Possible Reason: Circuit fault or incomplete warm-up.
  • Solution: Contact distributor or wait for complete warm-up.
• FFF display then power off:
  • Possible Reason: Circuit fault or sensor fault.
  • Solution: Contact distributor.
• Low voltage display then power off:
  • Possible Reason: Seriously low battery.
  • Solution: Replace with new batteries.

Important Notifications:

• Avoid dropping the device or subjecting it to strong shocks.
• High concentrations of noise gas may affect normal operation.
• Testing under low voltage may introduce errors in results.
• Wait at least 10 minutes after drinking before testing to ensure accuracy.
• For accurate results, especially after long periods of disuse, the first two tests may be unreliable; begin testing from the third time.
• Do not store or use the tester in environments with corrosive gases (e.g., Chlorine) or other harsh conditions.

The manufacturer reserves the right to improve the design without prior notice to ensure continuous product improvement.

NRS AT 818 Specifications

General

Brand	NRS
Model	AT 818
Category	Test Equipment
Language	English