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 -10～50Relative 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
1
1. Structure and Function Guide
1.1 Structure Guide picture:
2. Operation Instruction
2.1. Slide down the battery compartment on the back side, insert 3pcs AAA 1.5V batteries inside according
to battery polarity indication and close it.
2.2. Press the power button for 1S, after 1 beep sound, “ warm up “ will be displayed on LCD , after 20
second with 1 “beep“ sound, “ blow” will be displayed on LCD and start to countdown and inform for testing.
2.3. Blow directly to the mouthpiece, after 4 seconds with 1 ”beep” sound to inform to stop blowing and the
test result will be displayed on LCD.
2.4. Unit switch: On test result mode, press “power“ button to change the unit (% BAC-‰BAC -mg/l) the
final unit will be displayed for next test.
1 Mouthpiece
2 Buzzer hole
3 Switch Button
4 Input for external power
5 LCD Screen
6 Vent hole
2
2.5. Auto Power off: tester will auto power off after test result show on LCD for 20 Seconds.
2.6. The LCD flickering indicates low power of batteries, please replace two “AAA” alkaline batteries
2.7. Sensor fault self checking : when turn on , tester will check sensor’s mode is normal or abnormal, if
some abnormal thing is found which can auto repair ( about 10 seconds), if can not be repaired, LCD will
display “ ER”.
2.8. If a new testing needed, press the switch button again and repeat the above step 4.2～
3. Notification
3.1. Avoid any fall or strong shock.
3.2. If noise gas with high concentration existed, may the tester won’t work normally.
3.3. If testing is done under low voltage, certain error will be existed between the real value.
3.4. To ensure the testing result, please wait 10 min to take the testing after your drinking.
3.5. Please operate it strictly according to this instruction. If long time not use, when you first begin a new
testing, the first two times testing result may be unreliable, just begin testing from the third time, otherwise
the result will also not be accurate.
3.6. Do not keep the tester in the environment of Corrosive gas (Chlorine etc) for use or deposit, also in
other bad surroundings.
3.7. Under normal detections, sensor life could be more than two years.
3.8. After Long time use, there may be dirt on the tester, please use clean cloth to wipe off. Do not use any
hard object or the solvent with any Corrosive ingredient.
Remarks: Common Fault and Solving solutions
Fault Possible reason Solution
NO display on LCD
Incorrect battery
installation
Insert battery correctly
according to polarity
Low battery seriously New battery replacement
Circuit fault Contact distributor
No response to
detection gas
not complete Warm-up Waiting complete Warm-up
Circuit fault Contact distributor
FFF display then power off Sensor fault Contact distributor
Low voltage display then power off
Low battery seriously New battery replacement
To keep the continuous improvement of the products, we reserve the right to improve design
without prior notice.
