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 from PART66Online
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.
P
paulhb1972 asked · 26 Jun 2013
I have had this question elsewhere and the answer was to let it stand for an hour!?
Community Comments (3)
T
trap2307
26 Jun 2013
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
22 Oct 2014
yep, I have seen the same question with the correct answer to be "let it stand for one hour"
J
Jordi
20 Feb 2021
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.
More discussions in 11. Aeroplane aerodynamics, structures and systems
- A 4:1 step-up transformer receives 120VAC in its primary and has 1600 Ohms resistance in its secondary. What is the current drawn from the source?
- One lamp is connected across corresponding phases of two alternators. They will be synchronised when
- The CSD or IDG speed governor setting
- What is the EASA regulation of the minimum separation between a seat and another seat or structure?
- What external warning is there for an APU fire?
- A cockpit check on the engine firewire system is a