67 Pa. Code § 77.25
(b) Procedures. Procedures shall be as follows:
(1) An average deviation test shall be conducted to determine the accuracy of the instrument in the following manner:
(2) The Type A alcohol breath test equipment does not pass the accuracy inspection test and shall be removed from service if one of the following occurs:
(3) An example of an average deviation calculation for a breath testing device capable of being read to the third decimal place is as follows:
| Constant Value | Reading | Difference (absolute value) |
| .100 | .099 | .001 |
| .100 | .104 | .004 |
| .100 | .098 | .002 |
| .100 | .101 | .001 |
| .100 | .102 | .002 |
| .010 = .002 | ||
| 5 |
Average deviation = .002 and .002 does not exceed .005.
The provisions of this § 77.25 adopted December 21, 1984, effective December 22, 1984, 14 Pa.B. 4599; readopted January 12, 1990, effective immediately and apply retroactively to December 22, 1989, 20 Pa.B. 211. Immediately preceding text appears at serial pages (140065) to (140067).
Approval of Equipment
When the Intoxilyzer 500 has been approved as a testing device, and when the appellant’s only evidence that the device is not accurate was the bald, unsupported claim that it has a 50% error rate, the appellant failed to establish that the trial court erred in admitting into evidence the appellant’s blood alcohol content. Commonwealth v. Snell, 811 A.2d 581 (Pa. Super. 2002); appeal denied 820 A.2d 162 (Pa. 2003).
Malfunction
The failure of an Intoxilyzer 500 in the pretest did not constitute a malfunction, where ‘‘malfunctioning’’ means failing to perform on accuracy and calibration tests or during an actual breath test, and not otherwise; simply stated, a .090 percent BAC or above in a pretest is not a malfunction. Commonwealth v. Hoopes, 722 A.2d 172 (Pa. Super. 1998); appeal denied 737 A.2d 1224 (Pa. 1999).
Accurate, for the purposes of equipment of this type, is a relative term; equipment is accurate if the average deviation does not exceed .005. Commonwealth v. Mongiovi, 521 A.2d 429 (Pa. Super. 1987).
In order to comply with regulation regarding inspections for accuracy of breathalyzer equipment, breath test equipment must be tested within 30 days prior to use. Commonwealth v. Mongiovi, 521 A.2d 429 (Pa. Super. 1987).
Counsel may not use formula to arrive at average deviation other than that formula set forth in this chapter specifically for testing the accuracy of breath test equipment. Commonwealth v. Mongiovi, 521 A.2d 429 (Pa. Super. 1987).
A certificate showing that breath test equipment has been inspected for accuracy, and is accurate, shall be the presumptive evidence of accuracy required by 75 Pa.C.S. § 1547(c)(i), and, with the certificate of calibration, will be considered sufficient to support a reliable test result. Commonwealth v. Mongiovi, 521 A.2d 429 (Pa. Super. 1987).
The breathalyzer regulations at 67 Pa. Code § § 77.24—77.26 are reasonable, comport with State law and ensure valid test results. Baldinger v. Commonwealth, 509 A.2d 912 (Pa. Cmwlth. 1986).
This section cited in 67 Pa. Code § 77.24 (relating to breath test procedures); and 67 Pa. Code § 77.26 (relating to periodic calibration of Type A breath test equipment).