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The Datamaster DMT breath testing machine is used to determine blood alcohol concentrations of subjects arrested for DUI in Los Angeles County. The machine is used in cities such as Torrance, Redondo Beach, Palos Verdes, and most other cities in LA County except for Long Beach and the City Of Los Angeles.
The device is a “second generation” machine which replaced the Datamaster cdm machine which was used by the county for over two decades. The machine uses infrared absorption as the basis for its testing. Essentially a breath sample passes into a sample chamber of fixed volume and temperature. The chamber is essentially a cylinder approximately the size of a yellow highlighter commonly found in a office. During the testing process a beam of infrared light passes through the chamber. When the light beam exit
There are many error codes that can be generated by the machine during the breath sampling process. Among the more common is that of “ambient fail”. Sometimes the status code will be reported when the attorney reviews the usage logs and maintenance history of the machine during the discovery process.