The method of ascertaining the voltage of a standard aircraft lead-acid battery is by checking
- the voltage with rated load switched ON.
- the voltage immediately after charging.
- the voltage off load.
Explanation from PART66Online
A meaningful state-of-charge voltage reading is taken off load, with no current being drawn, so the internal-resistance drop does not distort it. Reading the voltage while a rated load is switched on would show a lower figure that reflects the load drop rather than the true cell condition.
J
JD2016 asked · 31 Oct 2016
What is the difference between Off load and open circuit?
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