From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Instructions for inspecting and maintaining battery electrolyte levels and density.
| Identifier | ExFiles\Box 26\2\ Scan160 | |
| Date | 1st August 1919 guessed | |
| -10- INSPECTION OF ELECTROLYTE. The levels of electrolyte in the cells should be inspected frequently and maintained to cover the plates by the frequent addition of distilled water. Use a syringe type hydrometer to take densities, which should be 1270 to 1290 for fully charged condition and after standing for an hour. If, in these circumstances, the densities are low, give a special charge if possible from an external source ( see later p.13 ) at 4 amperes until the density has remained constant in every cell for 5 hours. If still below 1280, it is important to remove some electrolyte and replace with electrolyte of 1350 density, until the required increase is secured, after which, again pass charging current for a short while. Unless acid has been lost by spilling, such replacement should never be required. As far as possible, arrange to make changes in the electrolyte just previous to charging. | ||