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Useful: Effects of temperature
Temperature variations produce a number of effects on watches. The main one is the loss of elasticity in the spiral when it is made of steel, for which a loss of about 11 seconds per degree Celsius per day (6.1 s/oF/day) is observed as the temperature increases. The expansion of the balance and the lengthening of the balance spring also produce a small loss which is compensated for by increasing the thickness and height of the balance spring.
The non-linear variation of the viscosity of lubricating oils as a function of temperature exerts a non-quantifiable influence which is generally very weak within the normal limits of watch wear. |
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