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Cartier 81 how to check if it works?

Khan
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Khan WRT Addict

Khan

Posted
Posted

Hi

The battery clamp was defect when i bought it. How can I test if the movement works before I buy a battery clamp?

Can I use a digital multimeter? 

There is reaction when I put the red and black needles on the battery + sign and on the upper end the magnet thing

IMG_20250106_152159874.jpg

IMG_20250106_152220127.jpg

AndyGSi Distinguished Member

AndyGSi

Posted
Posted (edited)

Just use a pair of metal tweezers to bridge between the battery and when the clamp connects.

Edit

I'd also look at alternatives before paying the Cartier price for one.

Edited by AndyGSi
Khan WRT Addict

Khan

Posted
  • Author
Posted
4 hours ago, AndyGSi said:

Just use a pair of metal tweezers to bridge between the battery and when the clamp connects.

Edit

I'd also look at alternatives before paying the Cartier price for one.

You mean like this? Nothing happened.

IMG_20250106_204023478.jpg

AndyGSi Distinguished Member

AndyGSi

Posted
Posted
12 minutes ago, Khan said:

You mean like this? Nothing happened.

IMG_20250106_204023478.jpg

Yes that's the idea but not sure if you'll need the correct size battery as I don't know if it is just the base that needs the +ve contact.

Have you got any other test equipment apart from a digital multimeter? Ideally it needs to be an analogue one.

Khan WRT Addict

Khan

Posted
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Posted
4 minutes ago, AndyGSi said:

Yes that's the idea but not sure if you'll need the correct size battery as I don't know if it is just the base that needs the +ve contact.

Have you got any other test equipment apart from a digital multimeter? Ideally it needs to be an analogue one.

I dont have the correct battery in stock, but know from previously it works with smaller battery. I unfortunately dont have analogue instrument. Hmm dont know what to do from here🙉

HectorLooi Distinguished Member

HectorLooi

Posted
Posted

I think the Cartier 81 is a 2 hand movement and pulses only once every 20 seconds.

If you don't have any other test equipment, adjust both of hands together, then connect the battery and wait for at least 1 minute and see if the hands moved apart.

AndyGSi Distinguished Member

AndyGSi

Posted
Posted
19 minutes ago, Khan said:

Hmm dont know what to do from here

I think all you can do is put it to one side until you've got other test equipment or can find an alternative clamp with the correct battery.

  • Like 1
Khan WRT Addict

Khan

Posted
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Posted
30 minutes ago, HectorLooi said:

I think the Cartier 81 is a 2 hand movement and pulses only once every 20 seconds.

If you don't have any other test equipment, adjust both of hands together, then connect the battery and wait for at least 1 minute and see if the hands moved apart.

Still not working🤐

AndyGSi Distinguished Member

AndyGSi

Posted
Posted
7 hours ago, HectorLooi said:

Remove the circuit board and use your DMM to test the coil resistence. It should be around 1 to 3 K.

Why do they have to remove the circuit board to measure the coil?

HectorLooi Distinguished Member

HectorLooi

Posted
Posted

Because the contacts are covered by the circuit board. And I wouldn't want to risk breaking the wires by jamming a probe into that little gap.

  • Like 1
AndyGSi Distinguished Member

AndyGSi

Posted
Posted (edited)
1 hour ago, HectorLooi said:

Because the contacts are covered by the circuit board. And I wouldn't want to risk breaking the wires by jamming a probe into that little gap.

These are the coil connections.

image.png

Edited by AndyGSi
  • Like 1
AndyGSi Distinguished Member

AndyGSi

Posted
Posted
13 minutes ago, HectorLooi said:

Yes. And you see the 2 thinner than hair wires protected by blobs of epoxy.

I wouldn't go probing anywhere near them.

Yes you have to be careful but that's what they're their for as this example below.

image.thumb.png.20934e16d5c5a4069e0da83cea27dd93.png

AndyGSi Distinguished Member

AndyGSi

Posted
Posted
9 minutes ago, HectorLooi said:

Nah! That's just the manufacturer's ploy to sell more coils. 

We'll that's now I've always measured them and never had a problem.

Khan WRT Addict

Khan

Posted
  • Author
Posted

Maybe the circuit board is the problem? 

Because I see some wear on that circle to the left from the number in the bottom. 

Should I use the conductive pen here? 

IMG_20250110_214437309.jpg

IMG_20250110_214613098.jpg

And I have also checked the upper to sides of the coil with the digital meter, I guess its ohm to be checked? But no response.

IMG_20250110_222409812.jpg

Khan WRT Addict

Khan

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Posted
20 minutes ago, AndyGSi said:

It does look like there's damage to the pad and track next to it but if the coil is open circuit then that's your first fault to resolve.

I bet you are right. On the right end of the coils, I see something irregular as if somebody smashed in a screwdriver. So I believe this is a very costly repair if I ever go on with it. 

IMG_20250110_230737638.jpg

Neverenoughwatches Distinguished Member

Neverenoughwatches

Posted
Posted

It's nice to see when the coil is lacquered or resin coated. 

3 minutes ago, Khan said:

I bet you are right. On the right end of the coils, I see something irregular as if somebody smashed in a screwdriver. So I believe this is a very costly repair if I ever go on with it. 

IMG_20250110_230737638.jpg

If the break is near the end then there is a chance to reattach the coil from that point. It will affect the resistance.  I have never repaired one this way but I did have a go at unravelling one end a few years ago. Delicate steady handing cannot be overstated. 

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