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Alcohol in blood concentration method - uses device measuring alcohol concentration in breath by differential effect on temperature sensitive resistor
Alcohol in blood concentration method - uses device measuring alcohol concentration in breath by differential effect on temperature sensitive resistor
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机译:血液中酒精浓度法-使用对温度敏感电阻产生微分作用来测量呼吸中酒精浓度的设备
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摘要
The device measures alcohol concentration in breath at an instant determined by a timer, the instant being determined by an adjustable time interval beginning within the exhalation period. An error detector monitors the breath flow, and its direction signals the test invalidity when air flow during the above time interval lies below a fixed minimum, or if the air is inhaled. The error detector (327) has a differentiating element (333) and a temperature sensitive resistor (329) in the air flow between a voltage source (331) and the differentiating element (333).
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