quartz consumption

[dAz]

I just tested a few different quartz clock movments

quartex normal movement 0.15mA
Takane " " 0.15mA
1668 chinese make 0.25mA
Takane Heavy Duty 0.20mA

and a very old Jeco Tuning Fork(non quartz) 0.21mA

according to this page http://en.wikipedia.org/wiki/AA_battery

the AA Alkaline has somewhere in the range 1800-2600 mAh(milliAmp Hours)

and the Lithium LiFeS2 as used in the Energizer lithium AA has 2700-3400mAh

8760hours per year approx, at 0.15mA into 2600mAh = 1.97years.

the chinese movement would last 1.187years

on the lithium makes that 2.58years and 1.55years

the Jeco uses a C battery, they can have 8000mAh so it would last 4.34 years

a D battery has 12000mAh(1.2Ah) @ 0.15mA will last around 9years.

of course clocks have nothing on watch movements, most average ladies
sized analogues draw under a microAmp with a 377 battery having 28mAh
can last 2-3 years.

[Revision]

Post by dAz
I just tested a few different quartz clock movments

I just changed the factory-issued CR 2412 "ten year battery" in a
Seiko 8F32. Maybe five years on the battery. Good enough. We'll see
how the new one does. The CR 2412 is rated at 100 mAh.

One way a clock can stretch battery life is to fire the solenoid 450
times per hour (Westclox travel clock) instead of 3600 times per
hour.

Last year I purchased an Alba wristwatch, no second hand, and sure
enough it is a 450 bph movement. I appreciate Alba putting in this
movement instead of just another standard quartz movement. $60 and
thin.

Alba and Westclox
https://picasaweb.google.com/lh/photo/hbvn6UZyeTHQdlWEi9g-cNMTjNZETYmyPJy0liipFm0?feat=directlink

Wikipedia has info on watch batteries

Watch battery
http://en.wikipedia.org/wiki/Watch_battery

List of battery sizes
http://en.wikipedia.org/wiki/List_of_battery_sizes
.

[d530]

Post by Revision
I just changed the factory-issued CR 2412 "ten year battery" in a
Seiko 8F32. Maybe five years on the battery. Good enough. We'll see
how the new one does. The CR 2412 is rated at 100 mAh.

Hi, excerpt from the manual:

The miniature battery which powers your watch should last

approximately 5 years (Cal. 4F32) / 10 years (Cal. 8F32 and 8F33).

However, because the battery is inserted at the factory to check the

function and performance of the watch, its actual life once in your

possession may be less than the specified period. When the battery

expires, be sure to replace it as soon as possible to prevent any malfunction.



If the calendar checking function is used frequently, the battery life may be less

than the specified period.

[dAz]

Post by Revision
Last year I purchased an Alba wristwatch, no second hand, and sure
enough it is a 450 bph movement. I appreciate Alba putting in this
movement instead of just another standard quartz movement. $60 and
thin.

yep, there are movements that are not fitted with seconds hands that
pulse every 20seconds, 30seconds to one minute pulses, all this to
reduce battery consumption

[d530]

Post by dAz
yep, there are movements that are not fitted with seconds hands that
pulse every 20seconds, 30seconds to one minute pulses, all this to
reduce battery consumption

yep, and on the other end there is Bulova Precisionist (http://bulovaprecisionist.com/en/inside-precisionist/) with 57 600 pulses per second of stepping motor and 262 144 Hz oscillator frequency.

I don't think it's considerably more power consuming than standard quartz movement.

[dAz]

Post by d530

Post by dAz
yep, there are movements that are not fitted with seconds hands that
pulse every 20seconds, 30seconds to one minute pulses, all this to
reduce battery consumption

yep, and on the other end there is Bulova Precisionist (http://bulovaprecisionist.com/en/inside-precisionist/) with 57 600 pulses per second of stepping motor and 262 144 Hz oscillator frequency.
I don't think it's considerably more power consuming than standard quartz movement.

well the Omega MegaQuartz of the 1970s had a 2.4MHz crystal and an
indexing motor that worked similar to an Accutron running at 256Hz,
http://www.bestofwatch.com/?p=184

bulova Accutrons ran at 360Hz and the ESA9162 was 300Hz

Citizen and Junghans also make/made 4Mhz watches


so with the seconds hand on the megaquartz moving along 256 vibrations a
second is running considerably smoother than the 16Hz the Precisionist
is working at, and this was done over 40 years ago

http://www.bestofwatch.com/forums/viewtopic.php?p=22#p22

a 2016 lithium battery probably good for a couple of years at least

and of course if you really want a smooth seconds hand motion then
nothing beats the Seiko Springdrive.

[Frank Adam]

Post by dAz

Post by Revision
Last year I purchased an Alba wristwatch, no second hand, and sure
enough it is a 450 bph movement. I appreciate Alba putting in this
movement instead of just another standard quartz movement. $60 and
thin.

yep, there are movements that are not fitted with seconds hands that
pulse every 20seconds, 30seconds to one minute pulses, all this to
reduce battery consumption

... and to drive the watchmaker nuts(or nuttier, as the case may well be),
waiting for a pulse after a service.
Gimme a second pulser any day. 1 second to confirm working order, 10 seconds
to see if timing(when trimmer is present) is required[1] and the battery gets
replaced every ~2 years, assuring that any leak from the battery is far less
likely than in those 5-10 year battery wrecks.

[1] Does anyone actually bother timing quartz ? I'd have to see something
really bad for me to touch the trimmer.

And anyway who uses damn erasers and soft pencils anymore ? ;-)
It's an inside joke, only watchmakers may apply. :)


Oh, happy new year guys.
Hope you've all recovered well ready to work for another god damned year until
the next Christmas break. :-)

[dAz]

Post by Frank Adam

Post by dAz

Post by Revision
Last year I purchased an Alba wristwatch, no second hand, and sure
enough it is a 450 bph movement. I appreciate Alba putting in this
movement instead of just another standard quartz movement. $60 and
thin.

yep, there are movements that are not fitted with seconds hands that
pulse every 20seconds, 30seconds to one minute pulses, all this to
reduce battery consumption

... and to drive the watchmaker nuts(or nuttier, as the case may well be),
waiting for a pulse after a service.
Gimme a second pulser any day. 1 second to confirm working order, 10 seconds
to see if timing(when trimmer is present) is required[1] and the battery gets
replaced every ~2 years, assuring that any leak from the battery is far less
likely than in those 5-10 year battery wrecks.

10sec, 12sec, 20sec, 30secs and of course the 60second pulse, PIA while
waiting for the hand to move ;)

Post by Frank Adam
[1] Does anyone actually bother timing quartz ? I'd have to see something
really bad for me to touch the trimmer.

nope, even with a trimmer I never bothered, sure when the quartz first
came out even had a quartz timer once

but the way I see it, if the watch is out a couple of seconds a day it
needs new circuit, and seeing Swatch as from the first of this month
will no longer sell you a circuit for any of their quartz movements it
basically means a new movement

Post by Frank Adam
And anyway who uses damn erasers and soft pencils anymore ? ;-)
It's an inside joke, only watchmakers may apply. :)

:)

not a bad idea I suppose, still it looks odd to adjust a movement with a
pencil, last time I had one of those I could buy parts for it anyway,
shame, case was still good, and due to the odd shape of the movement
couldn't really make a different movement fit, would have been a bodge
anyway.

Post by Frank Adam
Oh, happy new year guys.
Hope you've all recovered well ready to work for another god damned year until
the next Christmas break. :-)

and happy new year to you :)

[Revision]

"Frank Adam"> [1] Does anyone actually bother timing quartz ? I'd have to
see something

Post by Frank Adam
really bad for me to touch the trimmer.

Some watch chips have a memory location for a correction factor that is
input at the factory, assuming they bother with it. The spec sheet on a
Phillips unit even describes how to input the number, by sending a pulse
string to one of the pins. Yeah, right.

I am not in range of a time setting transmitter, but the Garmin GPS unit
shows the correct time, as long as you wait for the minute change. Very
strange that it does not show the time in seconds, even on the sub-menu.

[J.B. Wood]

Very strange that it does not show the time in seconds, even on the sub-menu.

Hello, and why should it? Most folks don't purchase GPS units to
function as timepieces. My cell phone also doesn't allow for the
showing of seconds on the time display. Sincerely,