A Timegrapher
This app is to measure the BPH(Beats per hour) of mechanical watches.
It will display time error per day as well.
The app uses microphone to measure BPH.
** Recommend to plug a microphone into phone and attach the microphone to the back of your watch.
** Basic version display wave graph and pulse interval histogram.
** Frequency display requires 'Premium' upgrade.
** Please test the app with your watch before you purchase 'Premium' upgrade. The app will work as Premium during 30 min.
Not for digital clocks.
Not working in noisy environment.
Set microphone direction toward a clock.
- Review from Mr. Kojima
http://www.thewatchsite.com/index.php/topic,42142.0.html
- Preset example
Rolex or mechanical watch: Target frequency: 4 or 5Hz, Sample duration: 2Sec, Sensitivity: manual 50
Most pendulum clock: Target frequency: 1 or 2 Hz, Sample duration: 5 or 10 Sec, Sensitivity: medium
FAQ.
1) in the settings there is a sensitivity option with a high, medium, low and 3 manual settings, can you explain how this changes the results
It determines sound amplitude threshold for detecting clock sound. If your clock sound is loud you may reduce sensitivity. This will allow more environmental noises.
If you increase the sensitive, you may measure hand watches. But small noise may measurement errors.
2) why does the detected frequency change between light grey, black and red
Red means smaller drift during the measurement interval while grey means that measurement may have an error.
3) the average frequency does not always calculate, it stays at NaN
The 'detected frequency' should be red continuously.
4) how do you calculate the pulse drift %
abs(max detected frequency - min detected frequency) / detected frequency during 1 detection cycle.
5) what are the 2 graphs showing and what data are you using for the calculations
The size of bars in the upper graph should be almost the same.
The bottom shows amplitude of sound wave recorded from micro phone.
6) are newer versions of the app being developed
** You may provide sound sample by sending wav or mp3 file to [email protected]
Very useful app
Very accurate. I like it. Simple and quick.
Besides being very accurate at measuring bph, it has the added benefit of visually showing beat symmetry. Would like to see all options for bph selections, but there are probably hundreds!
Seemed to be ok during trial. Then useless unless you pay for it.
Rubbish
Not accurate. I put a pencil mark on my cuckoo clock's pendulum and got to within 30 sec in 24 hours. Clock Tuner app showed 8241 bph. After my 1st two very small adjustments it became immediately apparent from the pencil mark that adjusting the pendulum to reach 7200 bph would be GROSSLY slow. Recently our mantel clock was professionally repaired and the regulator set with a professional Timegrapher. It measured at 8992-9000 bph. Then the app stopped measuring; assume the free trial expired.
This is not free with optional purchases, because you must purchase it to use its core and purpose: determining the beat frequency. It will not tell you that frequency, it will only show you a pretty graph. This is falsely advertised.
Chart drawing bug is fixed.
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