Raketa_pulsometro
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Description
Il pulsometro Raketa non è un dispositivo elettronico, ma un orologio da polso sovietico (anni '80) prodotto dalla Petrodvorets Watch Factory, dotato di una scala graduata sul quadrante per la misurazione manuale della frequenza cardiaca.
Funzionamento:
Si attende che la lancetta dei secondi raggiunga la posizione delle 12 o delle 6.
Si inizia a contare 15 pulsazioni (ad esempio al polso).
Al 15° battito, si legge il numero indicato dalla lancetta dei secondi sulla scala pulsometrica del quadrante: quel valore corrisponde ai battiti per minuto (bpm).
Il principio matematico è semplice: se 15 battiti durano X secondi, la frequenza è (15/X) × 60 = 900/X bpm. La scala sul quadrante è pre-calibrata per dare direttamente il risultato senza dover fare il calcolo.
Dial inspired by the Raketa model
The Raketa pulsometer is not an electronic device but a Soviet wristwatch (from the 1980s) manufactured by the Petrodvorets Watch Factory; it features a graduated scale on the dial for manually measuring heart rate.
How it works:
Wait for the second hand to reach the 12 or 6 o'clock position.
Begin counting 15 pulses (for example, at the wrist).
At the 15th beat, read the number indicated by the second hand on the dial's pulsometer scale: this value corresponds to the heart rate in beats per minute (bpm).
The mathematical principle is simple: if 15 beats take X seconds, the rate is (15/X) × 60 = 900/X bpm. The scale on the dial is pre-calibrated to provide the result directly, eliminating the need for manual calculation.
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