Before checking the SG of a battery recently removed from an aircraft
- take the temperature of the electrolyte.
- carry out a capacity test.
- allow to stabilise for one hour.
Explanation
Specific gravity readings vary with electrolyte temperature, so before checking a battery's SG you must measure the electrolyte temperature in order to apply the correct temperature correction to the hydrometer reading. Without correcting for temperature the SG value, and the state-of-charge it implies, would be inaccurate.
paulhb1972 asking:
I have had this question elsewhere and the answer was to let it stand for an hour!?
Community Comments (3)
T
trap2307 Posts: 43 26.06.2013 / 17:47
Hello!
Specific gravity of battery depends of temperature of the electrolyte. When you recently remove battery from aircraft, it should be hotter than in dormancy.
Actually, if we should wait for an hour, temperature will normalize. But as we know, 1 hour in aviation is very expensive. If you have have another information, please give me a link.
Thank you for question.
Specific gravity of battery depends of temperature of the electrolyte. When you recently remove battery from aircraft, it should be hotter than in dormancy.
Actually, if we should wait for an hour, temperature will normalize. But as we know, 1 hour in aviation is very expensive. If you have have another information, please give me a link.
Thank you for question.
S
sta8ispolemi Posts: 9 22.10.2014 / 22:58
yep, I have seen the same question with the correct answer to be "let it stand for one hour"
J
Jordi Posts: 198 20.02.2021 / 10:35
the correct answer should be to allow the liquid to stabilize itself.At least this is what my textbook says from my academy.I think this answer is wrong .
Please Sign In to post a comment.