What is watch VPH?
What is watch VPH?
Vibrations per hour (vph, VPH) is a mechanical timepiece specification. It is used to express the frequency of a watch movement. VPH describes the number of times that a vibrating timekeeping component completes a vibration cycle in 1 hour.
What is a good VPH?
A watch’s frequency is measured by two different terms: hertz (Hz) and vibrations per hour (VpH) (Don’t worry, they’re interconnected). That’s extraordinary, though—most mechanical watches run at 2.5 to 4 Hz (18,000 to 28,800 vibrations per hour), which is more than enough for accurate, dependable timekeeping.
How is VPH calculated?
The frequency in Hertz is the number of oscillations per second. Double the hertz figure to get the number of vibrations or semi-oscillations per second. Multiply that number by 3600 (the number of seconds in an hour) to get the vph.
What is a 4Hz watch?
The most common frequency for modern mechanical wristwatch movements is 4 Hz, or 28,800 vph. A watch ticking at 4Hz makes 4 oscillations per second, or 8 semi-oscillations (or vibrations) per second. There are 60 seconds in a minute, so this watch would tick at 480 semi-oscillations (or vibrations) per minute.
What is the most accurate quartz watch?
When Seiko introduced the world’s first quartz wristwatch at the end of 1969, it presented its Japanese rivals Citizen with a problem. It made no sense to announce themselves as the world’s second producer of quartz watches, so they decided to make the world’s most accurate quartz watch: the Citizen Crystron Mega.
What does 28800 VPH mean on a watch?
A watch with a 28,800 vph balance is completing 4 Hz/28,000 vibrations/beats, or 14,400 oscillations, per hour. The larger the number, the faster the balance vibrates/oscillates. At this point, however, it all seems very theoretical and you are probably wondering why this should interest you.
What is VPH (vibrations per hour)?
Vibrations per hour (vph), Hertz (Hz), beats per hour (bph), or train count: no matter what you call it, all watches have it. Well, what is it? Hertz (Hz) is metric and measured in full cycles per second; vph is traditional and refers to half cycles per hour.
What is the difference between Hertz and VPH?
Hertz (Hz) is metric and measured in full cycles per second; vph is traditional and refers to half cycles per hour. To convert Hertz to vph (or vice versa), multiply (or divide by) 7,200: 3,600 (seconds in an hour) x two (half beats).
