Alcohol breath tests faked in Victoria Australia

Alcohol breath tests faked in Victoria Australia

https://www.abc.net.au/news/2018-05-30/victoria-police-record-fake-roadside-breath-tests/9817846

How can this kind of police corruption happen in Australia ?

Working holiday visa holders take note. Be aware and question every thing.

Be safe and don’t drink. You can then catch the fake police test with confidence in Australia.

Its not corruption , its just police trying to meet their targets and presumably keep their jobs.

Is the same thing happening in the other states as well?

Was it OK for the banks to break rules to make profits ?

Accuracy

Breath analyzers do not directly measure blood alcohol concentration (BAC), which requires the analysis of a blood sample. Instead, they measure the amount of alcohol in one’s breath, BrAC, generally reported in milligrams of alcohol per liter of breathed air. The relationship between BrAC and BAC is complex, and is affected by many factors.

Calibration

Calibration is the process of checking and adjusting the internal settings of a breath analyzer by comparing and adjusting its test results to a known alcohol standard. Breath analyzer sensors drift over time and require periodic calibration to ensure accuracy. Many handheld breath analyzers sold to consumers use a silicon oxide sensor (also called a semiconductor sensor) to determine the alcohol concentration. These sensors are prone to contamination and interference from substances other than breath alcohol, and require recalibration or replacement every six months. Higher-end personal breath analyzers and professional-use breath alcohol testers use platinum fuel cell sensors. These too require recalibration but at less frequent intervals than semiconductor devices, usually once a year.^{[citation needed]}

There are two ways of calibrating a precision fuel cell breath analyzer, the wet-bath and the dry-gas methods. Each method requires specialized equipment and factory-trained technicians. It is not a procedure that can be conducted by untrained users or without the proper equipment.

• The dry-gas method utilizes a portable calibration standard which is a precise mixture of ethanol and inert nitrogen available in a pressurized canister. Initial equipment costs are less than alternative methods and the steps required are fewer. The equipment is also portable allowing calibrations to be done when and where required.
• The wet-bath method utilizes an ethanol/water standard in a precise specialized alcohol concentration, contained and delivered in specialized breath simulator equipment. The wet-bath method has a higher initial cost and is not intended to be portable. The standard must be fresh and replaced regularly. In addition, the assumed water-air partition ratio for aqueous ethanol must be taken into account along with its associated uncertainty.^[11]

Some semiconductor models are designed specifically to allow the sensor module to be replaced without the need to send the unit to a calibration lab.

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