Being of the chronometric type, with a built in timing element operating over a fixed period of three seconds
The Precision Speed Indicator is a high precision indicator for the accurate measurement of revolutions per minute or linear speeds in feet per minute. Being of the chronometric type, with a built in timing element operating over a fixed period of three seconds, this speed indicator is especially suitable for accurate measurements of constant speeds. Accuracy ¡¾0.5% indicated.
The instrument operates in a totally automatic fashion. Once the start button is depressed, the indicator will begin to register revolutions over a fixed period of three seconds. The hands then stop and the reading may be taken from the dial at leisure. The pointer remains in a fixed position until returned to zero by depressing the reset button.
The instrument has a large, easy to read dial, with black figures indicating revolutions per minute and red figures on the inner circle indicating feet per minute readings, without any calculations.