[time-nuts] timing an ITR master clock

Tom Van Baak tvb at LeapSecond.com
Mon Apr 2 13:16:34 EDT 2018


Most people I know who time mechanical clocks use Bryan Mumford's Microset timer:



Bryan has a wide variety of sensors: optical, acoustic, magnetic, laser, etc.

Of course it is possible to home-brew a solution. Many of us have done that. But it's not quite as easy as it sounds to get a system that gives you reliable data.

Several people use PC's as the timer, but be aware that pendulum clocks can easily achieve ppm levels of stability in which case the data you get might actually be your PC being timed by a pendulum, not a pendulum being timed by a PC.

You might also get good advice from one of the watch & clock forums on the 'net. We tend to stay away from generic mechanical clock topics here on time-nuts.


----- Original Message ----- 
From: "Jerry Hancock" <jerry at hanler.com>
To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Sent: Monday, April 02, 2018 8:42 AM
Subject: [time-nuts] timing an ITR master clock

>I have a new to me International Time Recorder (pre-IBM) master clock.  I has second, minute and hour closures and was thinking of using the second closure to check the beat and time.  If others have done this kind of thing, let me know.  I have a mix of timing equipment, of course, and have to be careful with DC always, so I was thinking of just using an oscillator looped through the second switch to get a rough idea of the timing.
> Thoughts?  Beautiful clock, a friend of mine is the current expert having over 300 such clocks and affiliated secondary clocks, etc.
> Regards,
> Jerry
> Jerry Hancock
> jerry at hanler.com
> (415) 215-3779
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