§ 105.34. Manner of testing speedometers.

 (a)  Accuracy. A test speedometer shall be tested for accuracy and, if necessary, repaired and adjusted to obtain the greatest possible degree of accuracy. Testing shall include one of the following:

   (1)  A dynamometer test.

   (2)  A Speed-Master Quartz Speedometer Tester.

   (3)  A Stewart-Warner Speedometer Calibrator and required components.

     (i)   It will be necessary to have a measured or surveyed mile laid out and properly marked. If less than a mile, use Table 1:

 Table 1
1 mile or 5,280 feet = 1000 cable revolutions
1/2 mile or 2,640 feet = 500 cable revolutions
1/10 mile or 528 feet = 100 cable revolutions

     (ii)   Check the tires on the test vehicle for proper inflation.

     (iii)   Disconnect the speedometer cable from the back of the speedometer in the vehicle.

       (A)   Connect the speedometer cable to the counter. (S. S. White Mile-O-Meter).

       (B)   Place the vehicle rear wheel centered on line at the beginning of the measured course.

       (C)   Set the counter of the Mile-O-Meter to zero.

       (D)   Drive the vehicle over the measured course.

       (E)   Read the counter and compare it with Table 1.

       (F)   Establish degree or percent of error. In a given measured mile, there should be 1000 cable revolutions. The input speed is slow if less than 1,000. The input speed is fast if more than 1,000.

     (iv)   Disconnect the counter from the speedometer cable on the vehicle.

       (A)   Use the long flexible shaft from the calibrator with the proper 12-inch shaft that permits adopting to fit speedometer head in the vehicle.

       (B)   Proceed to check the speedometer in the vehicle against the master head on the calibrator at 10 mph increments, beginning at 10 to 100 mph, and record the proper information.

     (v)   Disconnect the calibrator flexible shaft from the rear of the speed head in the vehicle and connect the shaft in the vehicle to the speedometer head in same. The speedometer head in the vehicle being tested can also be tested by disconnecting the flexible shaft at the transmission and connecting it to the long flexible shaft from the calibrator. Then proceed as in subparagraph (iv)(B).

     (vi)   Information indicated above is based on United States standard of 1,000 cable revolutions per minute = 60 mph or 96 kilometers per hour.

   (4)  An examination of the speedometer cables to insure that they work freely and without defect or restriction.

 (b)  Forms. The following forms are required:

   (1)  A speedometer testing station shall permanently display a valid Certificate of Appointment, provided by the Department.

   (2)  A Certificate of Speedometer Accuracy, a form provided by the Department, shall be completed after a speedometer test or repair and signed by the Department speedometer inspection mechanic. A copy of the certificate shall be kept on file at the speedomoter testing station 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 §  105.34 adopted August 26, 1977, effective August 27, 1977, 7 Pa.B. 2422; amended June 23, 1978, effective June 24, 1978, 8 Pa.B. 1692; republished and compiled August 1, 1980, effective August 2, 1980, 10 Pa.B. 3199; 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 pages (122755) to (122756).