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flat assembler > Heap > Batteries for the electronic calculator Citizen SDC-848.

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MHajduk



Joined: 30 Mar 2006
Posts: 5983
Location: Poland
shoorick wrote:
using metal caliper you can measure battery insulated with thin polyethilen, obviously it may be piece of packing bag or similar
Yeah, I also thought about that. The ideal solution for all possible purposes would be metal calipers with ceramic coating on the jaws as an insulator. This way we could reach two goals at once: accuracy of the metal calipers and safety when there would be need to measure such elements as batteries, accumulators etc.

I wonder if such kind of calipers exists at all. Smile
Post 08 Jun 2018, 11:15
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16051
Location: 112 Ocean Avenue, Amityville
If you can find some accurately made flat insulator then you can use that across one of the jaws. Then, assuming you have a digital caliper, just use the "zero" button to do the automatic subtraction. The insulator would need to be of even thickness throughout and be very flat with no bumps or waves. Random bits of plastic or paper might okay if accurate readings are not required.
Post 08 Jun 2018, 11:24
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MHajduk



Joined: 30 Mar 2006
Posts: 5983
Location: Poland
revolution wrote:
If you can find some accurately made flat insulator then you can use that across one of the jaws. Then, assuming you have a digital caliper, just use the "zero" button to do the automatic subtraction.
That's interesting solution. So, it's something like calibration of the electronic balance, isn't it?
Post 08 Jun 2018, 11:30
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16051
Location: 112 Ocean Avenue, Amityville
The digital calipers are really easy to use. Set your zero point and you can go both negative and positive. Of course most usage is when zero means the jaws are closed and we only get positive readings. But when you have something extra in the jaws, like an insulator, then you can easily subtract that from the reading by re-zeroing.
Post 08 Jun 2018, 11:42
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shoorick



Joined: 25 Feb 2005
Posts: 1603
Location: Ukraine
measure any insulator with the same caliper, then measure it both with battery, finally take the difference Wink i thought about this when suggest thin polyethilen, but then supposed the thickness of such film is much less then tolerance of battery size Wink
Post 08 Jun 2018, 12:41
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MHajduk



Joined: 30 Mar 2006
Posts: 5983
Location: Poland
As far as I know, some models of electronic calipers and simple metal calipers are sold in comparable prices, so it would be reasonable to get electronic ones. Smile
Post 08 Jun 2018, 12:55
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16051
Location: 112 Ocean Avenue, Amityville
There are electronic ones and there are electronic ones. Some have poor resolution and poor accuracy. Some are made with plastic which flexes and warps easily. Some don't have the small wheel to ensure even pressure. Some drift in calibration when the temperature changes. Etc. etc. etc. You get what you pay for probably.
Post 08 Jun 2018, 13:07
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