The Weishi Timegrapher is the natural choice for amateur watchmakers looking for a timegrapher. In the world of timing machines, not only is it low cost, but it gives you a way to measure amplitude and not just the rate and the beat error for your service work.

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Testing The Weishi Timegrapher

Today I’m going to be testing the accuracy of the Weishi 1900, which is the Chinese made version of the more expensive Swiss made Witschi Timegrapher.

I’m going to be testing it against my professional grade analyzer, the eTimer, which is calibrated to be accurate within one tenth of a second per day.

How I’m testing the Movement

For this test, I’m going to be using a PT 5000 movement,  wound at full power. I’m going to test it for one minute on my Weishi 1900 and then test it again for one minute on the escapement analyzer.

Testing for one minute will give the movement plenty of time to settle into that position. That will give us as accurate a measurement as possible.

I’m also going to allow the movement to sit on the Weishi mic stand for 30 seconds before starting the first test.

Weishi Timegrapher Testing Results

Difference In Rate

Difference in Rate on Weishi Timegrapher
Difference in Rate on Weishi Timegrapher

Looking at the results side by side, you can see that the Weishi 1900 is off by just over two seconds a day. So that’s not terrible.

Difference in Amplitude

Difference in Amplitude
Difference in Amplitude

The amplitude on the Weishi is showing 15 degrees lower than the actual amplitude.

Difference in Beat Error

Difference in Beat Error
Difference in Beat Error

and it’s showing the beat error to be slightly better than it actually is.

Does this mean you shouldn’t buy one?

No, of course not.

For the average home watchmaker, these machines are going to be fine. The rate being off a couple seconds per day doesn’t really matter that much.

I was a little surprised that the amplitude was off by 15 degrees. That should really tell you that you don’t want to guess when you’re putting in your lift angle.

If your lift angle is off by just two degrees and the machine is off by another 15 degrees, that adds up to about a 25 degree difference. That’s not good when you’re trying to troubleshoot amplitude problems.

The difference in beat error is not really a problem when it’s this close to zero. If you’re on the high side of beat error, it could be hiding some potential issues.

Frequently Asked Questions

How do you use a Weishi 1000 timegrapher?

How to Use a Timegrapher

The Weishi 1000 timegrapher is a tool used by watchmakers and technicians to measure the accuracy of a mechanical watch’s timekeeping. To use the Weishi 1000 timegrapher, follow these steps:

Get Connected

  1. Turn on the timegrapher by plugging it into a power source.
  2. Place the watch in the correct position for testing. The most common positions are “dial up” (with the Dial facing up), “crown left” (with the crown facing to the left), “Crown Up” (with the crown facing up) and “crown down” (with the crown facing down).
  3. Connect the watch to the timegrapher using the microphone or a sensor.
  4. Adjust the microphone or sensor to make sure it’s picking up the watch’s ticks accurately.
  5. Input the Correct Lift Angle for the movement.
  6. Press the “Start” button on the timegrapher to begin the test. The timegrapher will measure the watch’s rate, amplitude, and beat error.

Analyze Results

  1. Wait for the test to finish, which usually takes around one minute.

2. Analyze the results on the timegrapher’s display. The rate should be within a certain range, usually +/- 10 to 25 seconds per day for a movement in healthy condition. If your watch is new you can look up the manufacture specifications for that movement.

3. The amplitude should be consistent, around 270 degrees on a full wind,

4. The beat error should be less than 1.0 ms. Anything over 1.0 ms will affect the rate of the watch.

Watches in need of service will have very high or low rates and low amplitude.

Overall, the Weishi 1000 timegrapher is a useful tool for anyone who works with mechanical watches and wants to ensure their accuracy and precision.

Is it worth buying a timegrapher?

It depends on why you want one.
If you want to service and repair watch movements, a timegrapher is one of the first tools you need to invest in. It can help you diagnose and fix issues with the Service Work you performed.
It’s kind of like a report card on your work.


If you’re a casual watch enthusiast who owns a few watches, then a timegrapher is not really needed.
You can see how well your watch keeps time on your wrist.
You can still get your watches serviced and regulated by a professional without needing to invest in your

What does a timegrapher do?

A timegrapher is a tool used by watchmakers to measure the accuracy and performance of a watches. It does this by measuring key sounds made inside the escapement. Here are some of the key functions of a timegrapher:

  1. Measure the rate: The rate of a watch refers to how much time the watch gains or losses over a period of 24 hours. A timegrapher can measure the rate of a watch and display it as the number of seconds gained or lost per day.
  2. Measure the amplitude: The amplitude of a watch refers to the angle that the balance wheel swings back and forth. Amplitude is basically how much power the mainspring. It is reflected by how much the balance wheel swings.
  3. Measure the beat error: The beat error of a watch refers to the time difference between the watch’s “tick” and “tock” sounds. Differences in beat error over 1.0 ms can indicate a problem within the movement.
  4. Provide a graphical display: A timegrapher can display the performance of a watch graphically, showing the balance wheel’s movement and other data in real-time.
What is a good timegrapher reading?

A good timegrapher reading for a mechanical watch will depend on the specific condition of the watch.
For a watch medium grade watch, in good condition, a rate within -10 to +20 seconds per day with an amplitude of around 250 to 300 degrees, and a beat error of less than 1 millisecond would be considered good.


It’s important to note that the acceptable range of variation can vary widely depending on the manufacturer, age, and condition of the watch.


Some watches may have tighter tolerances and more strict accuracy standards than others, so it’s always a good idea to consult the manufacturer’s specifications or seek advice from a professional watchmaker or technician.


In addition to the specific readings, a good timegrapher reading should also be consistent over time. If a watch’s readings vary widely from day to day, it may indicate that there’s an issue with the watch’s movement or regulation.


A consistent reading over time indicates that the watch is keeping accurate time and functioning properly.

Conclusion

If you don’t have a timegrapher yet and you’re servicing movements you are never going to improve.  

As a new watchmaker, one thing that a timegrapher does for you is that it tells you how good of a job you’re doing on your service work.