Section 105.75. Manner of testing

(a) Test.

(1) A mechanical stopwatch shall be tested with a ‘‘Watch Master’’ or similar device.

(2) An electronic stopwatch shall be tested by measuring the frequency of crystal between the common terminal at the base of the battery and the test point or output terminal on the crystal, with a digital counter of at least 1 part in 10⁶ accuracy. The counter accuracy shall be traceable to the National Bureau of Standards. Note: Plus or minus 1 Hz is plus or minus 3 seconds in 24 hours; plus or minus 2 Hz is plus or minus 6 seconds in 24 hours; plus or minus 3 Hz is plus or minus 9 seconds in 24 hours.

(b) Forms. Upon determining that a stopwatch is accurate, a stopwatch testing station shall issue a certificate of accuracy on a form provided by the Department. The certificate shall contain the date of the test and the signature of the person who conducted the test. The certificate shall be kept on file for at least 2 years. A duplicate copy, executed and signed in the same manner as the original, has the same force and effect as the original.

The provisions of this § 105.75 adopted August 26, 1977, effective August 27, 1977, 7 Pa.B. 2422; amended August 18, 1978, effective August 19, 1978, 8 Pa.B. 2311; amended October 27, 1978, effective October 28, 1978, 8 Pa.B. 2918; republished and compiled August 1, 1980, effective August 2, 1980, 10 Pa.B. 3199; amended November 19, 1982, effective November 20, 1982, 12 Pa.B. 3983; readopted December 4, 1987, effective December 5, 1987, 17 Pa.B. 5051; amended February 17, 1989, effective February 18, 1989, 19 Pa.B. 640. Immediately preceding text appears at serial page (122767).