Interlock Device Overview .The interlock device is a breath-alcohol measuring instrument with a automobile immobilizer.After submitting a breath alcohol measurement, it prevents a driver who has consumed alcohol from starting the car.It can quite easily be installed into the motor vehicle.By installing an interlock device, you can possibly prevent accidents caused by alcohol consumption.In addition to that, long-term changes in the drinking attitude may be an added benefit.Benefits of Ignition Interlock.- Records all events in data storage for review later.- Leads to instantaneous separation of alcohol drinking and operating a motor vehicle.- Supports long-term attitude changes overcoming alcohol issues.- Prevents the starting of the vehicle when alcohol is picked up in the driver's breath.- Is resistant to tampering.- Offers the possibility for repeated retests.- Boosts safety for drivers and passengers.- Can improve the reputation of transport companies.- Prohibits accidents while under the influence of alcohol.Interlock Device Measurement Process .1.Turn vehicle's ignition on.2.Vehicle operator receives request to blow into the system.3.Measurement of breath alcohol concentration takes place.4.Accepted breath sample. motor starter is enabled > start motor.5.Rejected breath sample. motor starter is disabled.Basic Components and Application.Most interlock systems include two main components. the breath-alcohol measurement instrument with the measuring system, which is situated within the automobile, and a control unit which is typically installed under the dashboard and allows or prevents current being provided to the vehicle's starter system.When the ignition is powered on, the device requests a breath sample from the driver.The result of the breath-alcohol concentration measurement determines whether the vehicle's starter is engaged and the motor can be started.Automobile operators come across long waits after switching on the ignition particularly annoying.Therefore, during development of various interlock devices, attention was paid to making sure that the instrument would be ready for use quickly.Device Measuring Technique & Data Storage .The system establishes the BAC by means of an electro-chemical sensor program, also used breath-alcohol measuring tools of police authorities.It reacts with excessive specificity to alcohol.Consequently, other exhaled substances or cigarette smoke do not distort the measurement result.While the vehicle is in use, relevant events are reported in the data log. time, date, submission of or refusal to do a breath sample, measured alcohol concentration, engine starts and stops, electrical bypassing of the interlock and any other attempts to tamper with the device.The data can be delivered electronically and compiled in a data record.Manipulating Interlock Devices.The utilization of auxiliary means to circumvent the unit, as for example an air pump, balloon, or the use of air filters, is constantly detected and starting the motor is prevented.A vehicle start-up as by push-start or jump-start without previous delivery of an accepted breath sample is recorded in the data log.
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