Anyone with this movement 😭

 

Not directly familiar.
Try this: crown in pos 2 (quickset date position).
Push "Reset" button once...then see if Start/stop adjusts ChronoSeconds hand.
If so, push "Reset" again to advance to the next counter and repeat until done.

You might have to conduct a hard reset first...which likely involves pressing both pushers for 10 seconds while crown is in pos 2.

Regards, BG

 

When the crown is on pos2, reset (bottom pusher) press does nothing, but when you hold it, the seconds crono hand and the 30 minutes sub dial do a full turn and reset where they were previously. Holding both pushers at any positions does nothing.

It wouldn't make much sense, but is it possible that this movement doesn't have a reset? ISA815 is pretty old from what i've read, but i have never seen or heard of a chrono movement without the recalibration function. If its related to the malfunction of the movement, can it be because it needs cleaning or is not being able to reset the hands is more related to the electronic modules having some issues/broken? Never had a chrono that couldn't reset, so any help would be great.

 

Try this:
1. Crown in pos 2, then hold reset pusher until chrono s and min sub do their turn and stop.
2. Now press start/stop pusher and see if chrono s advances.
3. If it does, then set to correct position.
4. Now push reset pusher once again (do not hold it).
5. See if start/stop pusher now advances minute counter...if so reset.
6. Return crown to pos 1.

I doubt that the 815 has no recalibration function...if so, you will have to reset the hands.

Regards,
BG

 

Try this:
1. Crown in pos 2, then hold reset pusher until chrono s and min sub do their turn and stop.
2. Now press start/stop pusher and see if chrono s advances.
3. If it does, then set to correct position.
4. Now push reset pusher once again (do not hold it).
5. See if start/stop pusher now advances minute counter...if so reset.
6. Return crown to pos 1.

I doubt that the 815 has no recalibration function...if so, you will have to reset the hands.

Regards,
BG

Thanks for the help. Tried it all, but no luck....... until now! For those who might be be searching online on how to recalibrate this movement, its something i never had to deal with, since it is always done with pushers. On the ISA815, you have to use the crown?

1- You set the crown on pos2.
2- Hold buttom right pusher (the reset pusher) until the 30m sub dial and seconds chrono hand begin to do their full revolution of the dial. When you see the 30m sub dial at 12 o'clock (the hands are moving, so you gotta be quick), extend the crown on pos3. This will recalibrate the 30m sub dial to start exactly from where the hand was when you've extended the crown to pos3, which should be at 12 o'clock.
3- To recalibrate the chrono seconds hand, you do it similarly. Set the crown to pos2, and simply begin the chrono with the top right pusher. When you see the hand reach 12 o'clock, extend the crown to pos3, and it will recalibrate it to always begin at 12 o'clock when the chronograph is activated. Remember, you have under 1 minute (when the chrono hand is activated) to reset the chrono hand or the 30 minutes sub dial hand will move by 1 minute, and won't begin at 12 o'clock if you extend the crown to pos3 when the sub dial hand has moved from its 12 o'clock position. If you mess up, just repeate the first two steps then followed by step 3.

Not too sure why this movement has pushers, but you don't really use them to recalibrate the hands ?Old design, i guess.

 

Good on you! And thanks for sharing.
Regards, BG

 

Bonjour j'ai une montre Claude Helier chrono Isa a815 quartz .j'ai changé la pile et me suis aperçu qu'on ne pas la recalibrer avec les boutons comme les autres montres .mais on peut tout de même la recalibrer par le mécanisme de la montre avec le support de fixation de la pile qui joue un rôle majeur dans le recalibrage il faut que la partie interieure du support de la pile soit dans son logement et que la 2 nd partie touche la soudure du bas de la montre et doser peu a peu avec patience pour que les aiguille du chrono se remette à zéro .c'est un casse tête mais sa se recalibre . cordialement

 

I know this is a relatively old discusion thread, but is the only source of information about how to realign the chronograph hands on ISA815 movements. At least for the version I have in an 'Yves Meillon' watch, the pushers are used to realign hands. To enter calibration mode, the watch has a recessed button at 8 o'clock that can be pushed with a pin. Then, the chronograph pushers can be used to realign the hands. As I did this by trial and error and in chaotic way, I cannot say exactly how it is done, but it works.

As for the previous comment, I think it is partially right. If there is no recessed button for recalibration, one can probably mimick this by opening the watch and looking at 8 o'clock whether it is possible to enter calibration mode by touching on the side of the movement with a metal tool.

To conclude, ISA815, at least the three jewels A815 variant, has a mechanism to realign chronograph hands using the pushers. It is an interesting chronograph, as the movement of the seconds hand is similar to the one in meca-quartz movements, by fractions of second.

 

Thank you for the author's question and answers above. I searched for information for several days. Advice is everywhere for 95% of cases, but mine, like the author, is special. In addition, I could not find instructions for this mechanism anywhere. Thanks to you and the trial and error method, I understood and decided to write here. I will supplement the information on ISA QUARTZ A815 (815). It is necessary to calibrate the chronograph after about 2-3 hours of its use. 1. There is a recessed button for 8 hours. Pressed with something sharp and long. Or the cover is removed and where the battery is a contact. It is closed with a screwdriver. 2. After pressing, the second hand will shift by 5 seconds and at the same time make a full revolution of the minute hand of the chronometer. If not, then you need to press the hidden button for 8 hours and wait another 2-3 hours (you may have to replace the battery) This is very important!!! If everything is OK. The upper button adjusts the second, the lower button adjusts the minute hand of the chronograph. If you hold the button, the arrows move quickly, if you press, then the arrow will shift by one division. 3. After calibration, you need to press the recessed button again for about 8 hours. At this moment, the second hand will turn 360 degrees and return to the specified position. Thank you for your attention!

 

Hi sarsparilla,
So lucky i found this post. I signed up to this forum to get advise from you and duke199.
Anyway, I have the same exact issue with you. I have power8 roamer i read from one of the forum i think it has the same movement (ISA 8151) not sure if this is the same with ISA 815. But the problem is there is no pos3.

 

Thank you for the author's question and answers above. I searched for information for several days. Advice is everywhere for 95% of cases, but mine, like the author, is special. In addition, I could not find instructions for this mechanism anywhere. Thanks to you and the trial and error method, I understood and decided to write here. I will supplement the information on ISA QUARTZ A815 (815). It is necessary to calibrate the chronograph after about 2-3 hours of its use. 1. There is a recessed button for 8 hours. Pressed with something sharp and long. Or the cover is removed and where the battery is a contact. It is closed with a screwdriver. 2. After pressing, the second hand will shift by 5 seconds and at the same time make a full revolution of the minute hand of the chronometer. If not, then you need to press the hidden button for 8 hours and wait another 2-3 hours (you may have to replace the battery) This is very important!!! If everything is OK. The upper button adjusts the second, the lower button adjusts the minute hand of the chronograph. If you hold the button, the arrows move quickly, if you press, then the arrow will shift by one division. 3. After calibration, you need to press the recessed button again for about 8 hours. At this moment, the second hand will turn 360 degrees and return to the specified position. Thank you for your attention!

thank you!!!
Worked for my power8 roamer!!!