Tuning Forks and Freq Inst

1 Page 1 SOP 22 – 2019 Page 1 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 SOP 22 Standard Operating Procedure for Calibration of Traffic Speed Gun Tuning Forks and other Acousti... Open at page → 2 Page 2 SOP 22 – 2019 Page 2 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Calibration of Police Radar Instruments, D. W. Allan (NBS), F. H. Brzoticky (CO Dept. of Agriculture),... Open at page → 3 Page 3 SOP 22 – 2019 Page 3 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 2.2.2.2 A microphone, e.g., Shure SM57, Cardioid, Dynamic, or similar, is preferred for other acoustic... Open at page → 4 Page 4 SOP 22 – 2019 Page 4 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Assemble the system as shown in Figure 1. Figure 1. System Configuration. Tune the short-wave receiver... Open at page → 5 Page 5 SOP 22 – 2019 Page 5 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Reference, Option C, Use of Tuning Fork Gauge and NIST -transmitted Radio Signal. The tuning fork, or o... Open at page → 6 Page 6 SOP 22 – 2019 Page 6 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 immediately and record the frequency and temperature at the time of the measurement. Repeat previous st... Open at page → 7 Page 7 SOP 22 – 2019 Page 7 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Symbols Used in this Procedure Table 3. Symbols used in the procedure. Symbol Description v calculated... Open at page → 8 Page 8 SOP 22 – 2019 Page 8 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Record and report this product as the "speed" of the tuning fork to the nearest 0.01 mph or 0.1 mph as... Open at page → 9 Page 9 SOP 22 – 2019 Page 9 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Mechanical instability of a tuning fork, which varies with manufacturer, age, physical condition, etc.,... Open at page → 10 Page 10 SOP 22 – 2019 Page 10 of 10 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR. 8250 Typically, the expanded uncertainty of the measurement process does not exceed ± 0.02 % plus small var... Open at page →