Checking the Accuracy of the Clock on a NuTone IM4006 - Sends me down a Rabbit Hole of Thoughts
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- Опубликовано: 10 сен 2024
- It was a simple request, by our Customer - Check the accuracy of the Clock on his NuTone IM4006 Master Station
While some of the steps to do this seems straightforward - I obviously didn't get the "adjustment procedure" correct - I Guess??? ( I still think it's somewhat wrong or incomplete)
Anyway - The rest is in the Video
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I guess I'm just in the mood to overthink and muse about constructs ~ like Time. - The Doctor : People assume that time is a strict progression of cause to effect, but *actually* from a non-linear, non-subjective viewpoint - it's more like a big ball of wibbly wobbly... time-y wimey... stuff. - Chris
actually, I was wondering why I had to adjust the clock on my ima-4006 every few months, so I'm glad to see its not an atypical situation! Interesting stuff as always Chris! ~Brennan
Hi Brennan: You're welcome - I honestly don't think the Clock should be this inaccurate - Look for more about this in the near future - Chris
I have the exact same problem. From day 1, the clock on my system has gained time. I'd say about 3 to 4 minutes a month. I reset it from the time on my Windows computer which uses NTP to sync to an atomic clock. Anyhow, the good thing is we can't blame the intercom for us being late.
Hi jbs487: Good to know - I'm not done with this topic - look for more about this in the near future - Chris
Ours has this issue too!
Hi Kurt: Depending on how fast or slow your clock runs - it may be "typical" or it may be related to the Master Station needing ot be rebuilt - Chris
Well i would look around the crystal and the small value disk capacitors, also look at a tiny trimmer, they can play up.
If you have a frequency counter, you might be able to connect a low value capacitor say 5pf on to one of the crystal legs, and the other end of the 5pf capacitor goes to the counter.
Make sure the counter probe earth is earthed to the nutone chassis via a large disk capacitor.
The disk capacitor is to allow an earth without d.c problems.
Im saying the bloody obvious, sorry.
Hi zx8401ztv: You're right on with your suggestions - I'm not done with this topic yet - Look for more in the near future - Chris
My IM 4006 is similar. Not enough gain to fret over and I reset at the switch for Daylight Savings time twice a year....
Hi r.rasmussen: I think most of the clocks are failry accurate - not really a problem for most - I guess I did a good enough job on this customers Im4004, becuase he never called about the clock again - Chris
Probably get a more accurate clock with the Atomic Clock iPhone application. Or by receiving WWV with shortwave receiver.
Hi rkuns: This what I found about your idea;
"No. The iPhone is, at best, a Stratum-2 level clock. That is because, according to Apple, the iPhone (and Apple Watch) get their time from Stratum-1 clocks. This means they’re one step down from S-1, so they are S-2 devices.
An actual atomic clock would be a reference origin device, or a Stratum-0 time source. So the atomic clocks are S-0, and the iDevices are [again, at best] S-2.
That doesn’t mean they aren’t “perfect for all aspects of human consumption.” The difference between strata isn’t that great. For a Stratum-2 device, as long as it is synced at least once every hour, then it will remain accurate to within 46 microsecond. Even if you, somehow, managed to keep the phone battery charged but the phone completely disconnected from cell/wifi/bluetooth/gps - it would still take 91 days before you lost 1 second of time. And if the iPhone ever reconnects to the internet, then it will re-sync the clock to within 4.6 microseconds of the origin reference (the atomic [S-0] clock that feeds the S-1 clock that the phone is syncing to).
So can we say it is “as accurate as an atomic clock” - no. But only because when you make that kind of statement you are talking about accuracies which are physically beyond the capabilities of the electronics in the iPhone.
Can we say “the iPhone is more accurate than any human’s ability to discern time?” Yes, we’re pretty safe in that statement; just make sure you connect to the internet at least once a month. (Russell Rocket ~ Studied Aerospace and Aeronautical Engineering at Texas A&M University (TAMU)3y) (no date shown)
- Chris
@@northsideservicecompany3567 Plenty accurate to test multi day accumulated errors! The iPhone will keep getting back to correct time as the unity under test drifts away. Anyway, I’m an old ham radio operator, I set my watch to WWV by ear and hand.
I agree - the app is certainly much, much more accurate than is any clock that would be set by it - Chris@@rkuns
If you need an accurate time signal, why didn’t you use your phone? GPS requires and provides an atomic clock accurate time.
Hi TheCleric: Excellent point - Chris