If you were arrested for a New Jersey DWI, and you submitted breath samples at the police station, your breath testing was done on a Draeger Alcotest 7110 MKIII-C machine. There are many components to a DWI arrest, and it is important to understand how each part can be challenged. For example, if the machine was not calibrated properly, the breath test results can be suppressed, or thrown out.
Calibrating the machine involves running several tests on it with different alcohol “simulator” solutions. The solutions must be heated to 34 degrees Celsius, plus or minus 0.2 degrees. This temperature is supposed to simulate the temperature of human breath, however, studies have demonstrated human breath to be closer to 35 degrees. This difference in temperature can cause more than 6% error in the ultimate breath test result.
Appropriate temperatures are determined using an external NIST traceable temperature probe. NIST is the National Institute of Standards and Technology, which establishes and maintains basic international standards of measurement. The temperature probe is used to ensure the proper temperature of the solutions just before the calibration of the Alcotest.