ETA 2000-1 regulation

[Stuno1]

My wife’s Longines uses the eta 2000-1 and is running at minus 20-30 seconds in all positions. Is that normal? Assume this can be regulated to be more accurate?

Stu

[walkerwek1958]

Are those figures produced with the watch fully wound? If the watch isn`t running in a high state of wind it won't give good results.

I`ve never come across this movement, and after a few minutes reading up on it I don`t want to! Small and not easy to work on, with the added bonus that many of the parts are restricted and not available via Cousins.

If it needs work it'll be a job for some lucky lad......not me!

The watch might just need regulating, or possibly the auto-winding isn`t working properly so it's always running at low amplitude. Hand-wind it fully and check it again.

[Stuno1]

I hope it’s just regulating, the amplitude is 280 ish and best error is 0.1-0.3. Just not sure how accurate or not they are supposed to be.

I have given it a proper wind and results are the same.

[walkerwek1958]

If the amplitude's 280° that's fine. Forget about beat error, provided it's below 1 it won't affect the watch to any significant degree, on a modern watch that's easy to set it should always be around 0to 0.3 and it shouldn't change significantly.

Sounds like the watch does need regulating, which should be an easy job.

[Stuno1]

If the amplitude's 280° that's fine. Forget about beat error, provided it's below 1 it won't affect the watch to any significant degree, on a modern watch that's easy to set it should always be around 0to 0.3 and it shouldn't change significantly.

Sounds like the watch does need regulating, which should be an easy job.

Cheers. Seems to be that way. Digging around it says the movement is only regulated in 2 positions and is acceptable up to plus/minus 30 seconds so in theory it’s ok. I do think it could be made more accurate though.

[walkerwek1958]

Cheers. Seems to be that way. Digging around it says the movement is only regulated in 2 positions and is acceptable up to plus/minus 30 seconds so in theory it’s ok. I do think it could be made more accurate though.

If you've now got a timegrapher you can check the precision of the watch easily by comparing the rate in all 6 positions. I would expect the maximum difference to be 20 seconds or better, even taking account of the size of the movement and the limited claims made. The overall rate will approximate to the average of all positions, but this is very approximate and can vary from one watch to another. When a watch is being worn it is moving around, this will cause the amplitude to fall and the rate at any given moment won't equate to any of the fixed positions.

I don`t think there's any great mystery with this watch, the amplitude's healthy but the rate needs regulating. If there's positional variations of 40+ seconds that suggests all's not quite so well.

Sometimes a watch will appear to defy logic, the figures will all look good but a significant disparity between 'on the wrist' timekeeping and the estimate based on numbers will be observed. I can`t explain that.

[Stuno1]

If you've now got a timegrapher you can check the precision of the watch easily by comparing the rate in all 6 positions. I would expect the maximum difference to be 20 seconds or better, even taking account of the size of the movement and the limited claims made. The overall rate will approximate to the average of all positions, but this is very approximate and can vary from one watch to another. When a watch is being worn it is moving around, this will cause the amplitude to fall and the rate at any given moment won't equate to any of the fixed positions.

I don`t think there's any great mystery with this watch, the amplitude's healthy but the rate needs regulating. If there's positional variations of 40+ seconds that suggests all's not quite so well.

Sometimes a watch will appear to defy logic, the figures will all look good but a significant disparity between 'on the wrist' timekeeping and the estimate based on numbers will be observed. I can`t explain that.

In 7 positions the variance was no more than 10 seconds. I think it’s all good. Just needs regulating.