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Calibration 

 

The Smart Breathalyzer 1.0 is calibrated during manufacture using test results and 
mathematical formulas. Known alcohol concentrations are passed through the sensor to set 
baseline values for testing. During testing, the unit compares users’ breath samples to these 
baseline values. 
 
The accuracy of breath alcohol testers can fluctuate after six to twelve months of normal use, 
depending on the number of tests performed and operating conditions. It is because the 
alcohol sensor used in the device will not function well. If this product is providing inconsistent 
test results, is not providing any test results, or provides unusually high or low test results, the 
Sensor should be replaced and calibrate by the company. 
 
The product should be recalibrated at least every six to twelve months depending on frequency 
of use and operating conditions.  
 
During recalibration, the company will reset the sensor baseline values and also perform a full 
diagnostic check to ensure the accuracy and reliability of the product.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for Notebook 10

Page 1: ......

Page 2: ...ents obtained by this device are used in the diagnosis of alcohol intoxication User Manual Introduction 2 Dose specific Effects of Alcohol 3 Specifications 4 Components Diagram 5 Operation 6 Verification and Calibration 7 Precautions 8 Technical Note Description of Design Components 9 Testing 17 ...

Page 3: ...red in How does alcohol affect my body Alcohol is a depressant It has a relaxing effect on the muscles in your body The muscles of your eyes relax and lose focus Your eyesight will become fuzzy and you may experience double vision Brain activity is slowed Your judgment reflexes and coordination are all negatively affected Some vision impairments that occur when you have been drinking include Narro...

Page 4: ...ssibility of nausea and vomiting Reflexes Reaction time Gross motor control Staggering Slurred speech Temporary erectile dysfunction 0 200 0 299 Nausea Vomiting Emotional swings Anger or sadness Partial loss of understanding Impaired sensations Decreased libido Severe motor impairment Loss of consciousness Memory blackout 0 300 0 399 Stupor Central nervous system depression Loss of understanding L...

Page 5: ...ifications Dimensions 5 5 x 4 0 x 2 5 inches Weight 200g Sensor Technology MQ3 Alcohol sensor Detection Range 0 00 0 09 B A C Warm Up Time 60 80 seconds Operating Temperature 25 34 C Maximum Operating Time 30 minutes ...

Page 6: ...5 P a g e Components Diagram Display Push button Keypad Switches Mouth piece plug in ...

Page 7: ... you have to press F2 to start the breathalyzer function STEP 3 Wait until display shoes press the push button After that you can take readings by pressing the push button STEP 4 Insert a mouthpiece into the Mouthpiece slot STEP 5 Press the push button and give the device to take the breath sample STEP 6 Press the push button and give the device to take the breath sample STEP 7 Enter the license n...

Page 8: ...number of tests performed and operating conditions It is because the alcohol sensor used in the device will not function well If this product is providing inconsistent test results is not providing any test results or provides unusually high or low test results the Sensor should be replaced and calibrate by the company The product should be recalibrated at least every six to twelve months dependin...

Page 9: ...or Hygiene reasons use a new mouthpiece for each test subject 9 You cannot use the results of this product in court You have to send the person who caught drunk to do a blood test 10 Do not use the Smart Breathalyzer 1 0 as a tool to determine whether you should operate a motor vehicle or equipment or perform any other dangerous act 10 Do not drink and drive Always have a designated driver when al...

Page 10: ... widely used in domestic alcohol gas alarm industrial alcohol gas alarm and portable alcohol detector Features High sensitivity to alcohol and small sensitivity to Benzine Stable and long life Fast response and High sensitivity Only supported for Arduino Platform Hardware Overview This is an Analog output sensor This needs to be connected to any one Analog socket in Arduino A0 The output voltage f...

Page 11: ...view As shown in Figure 4 Temperature and humidity can affect gas sensor reading considerably Therefore we re going to use Temperature Humidity Sensor for the calibration of the device to be used in any environmental condition ...

Page 12: ...uad Band network and combines GPS technology for satellite navigation Features Supports multiple frequencies Quad band 850 900 1800 1900MHz GPRS multi slot class12 connectivity max 85 6kbps down load up load Supports charging control for Li Ion battery Supports Real Time Clock Supply voltage range 3 4V 4 4V Supports 3 0V to 5 0V logic level Low power consumption 1mA in sleep mode Supports GPS NMEA...

Page 13: ...utton We previously used Atmega 328 MCU But due to insufficient flash memory we jumped to an Arduino Mega board Technical Overview Operating Voltage 5V Input Voltage recommended 7 12V Input Voltage limit 6 20V Digital I O Pins 54 of which 15 provide PWM output Analog Input Pins 16 DC Current per I O Pin 20 mA DC Current for 3 3V Pin 50 mA Flash Memory 256 KB of which 8 KB used by bootloader SRAM 8...

Page 14: ... the remote database This keypad is embedded to the device and it is used to controlling the Breathalyzer too Hardware Overview Connecting Keypad to LCD display Connect the ground and Vcc pins of the LCD to the Arduino then connect the LCD s SDA and SCL pins to 20 21 respectively on Arduino mega ...

Page 15: ...t Breathalyzer Following diagrams are the design images of the device Device was printed using a 3D Printer and top and bottom was sealed with two Perspex sheets Figure Design by Solid Works Figure Actual Device After Printing ...

Page 16: ... engine Node js uses an event driven non blocking I O model that makes it lightweight and efficient In our Web App only CPU intensive computation is the decrypting part Therefore we thought of using Node js with Express Advantage with using Node js is its fast than PHP backend programs and we are using JSON storage Object DB MongoDB so that we can take out the whole process with Javascript 2 Herok...

Page 17: ...30 20 1 44 0 05 52 8 8 330 40 1 44 0 05 52 8 8 330 60 1 16 0 04 52 8 8 330 180 4 27 0 01 72 40 180 40 1 0 09 72 40 180 60 1 0 09 72 40 180 100 1 06 0 08 90 40 133 40 1 15 0 07 90 40 133 60 1 28 0 06 90 40 133 180 2 04 0 03 90 40 133 240 2 68 0 02 Any 0 00 Callibaration of MQ3 gas sensor using test results Figure VARIATION OF BAC AND BrAC WITH TIME Mins ...

Page 18: ...ue Rs R0 BAC percentage 1 44 0 05 1 44 0 05 1 16 0 04 4 27 0 01 1 0 09 1 0 09 1 06 0 08 1 15 0 07 1 28 0 06 2 04 0 03 2 68 0 02 y 0 0811x 1 435 0 0 01 0 02 0 03 0 04 0 05 0 06 0 07 0 08 0 09 0 1 0 0 5 1 1 5 2 2 5 3 3 5 4 4 5 BAC percentage F i g u r e ...

Page 19: ...21888 4 27 1 451614 0 01 4 60517 1 0 0 09 2 40795 1 0 0 09 2 40795 1 06 0 058269 0 08 2 52573 1 15 0 139762 0 07 2 65926 1 28 0 24686 0 06 2 81341 2 04 0 71295 0 03 3 50656 2 68 0 985817 0 02 3 91202 This equation will give accurate results for BAC for two decimal places y 1 4354x 2 5116 5 4 5 4 3 5 3 2 5 2 1 5 1 0 5 0 0 0 2 0 4 0 6 0 8 1 1 2 1 4 1 6 ln BAC ...

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