Your Criminal FAQ's answered by Attorney Tim James, shown here with his wife/bookkeeper Pat
Even the manufacturer of the breath testing device used in Texas does not warrant it to be fit for any particular purpose.
There is a great debate over whether the machine accurately assesses alcohol concentration because blood alcohol concentration appears to vary depending on gender, weight, consumption of food and many other variables.
Since the machine doesn't save any of the breath, you cannot have it re-tested.
If a Lawyer simply tells you to take the Breath Test then you should consider changing Lawyers.