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).
Testing procedures and specifications for condensers, detailing capacity and static charge retention checks at various temperatures.
| Identifier | ExFiles\Box 165\5\ img004 | |
| Date | 11th January 1928 guessed | |
| -2- Contd. (7) The capability of holding a static charge should again be verified. (8) The condenser should again be tested for final capacity, when the milli-amperes taken at 200 volts 50.7~ for a condenser temperature of 18°C shall lie between the limits 17.5 and 21.0. For other atmospheric temperatures, the limits must be increased or reduced proportionally at the rate of 1.5% per °C. These allowable limits should also be increased or reduced proportionally if the voltage is not exactly 200. Note:- Corresponding capacity limits at 18° .275 to .325 mf. (9) The condensers should be given a short run on an otherwise standard distributor and sparking rig, with a view to observing the degree of sparking at the contact points. A condenser with a faulty connection will generally shew bad sparking. (10) The capacity of the condenser should be checked at a temperature of 45°C, and should fall within the limits .41 to .52 mf. It should also be ascertained that at this temperature, the condensor is still capable of holding a static charge for a time long enough to observe this on causing the condenser to discharge. EFC. | ||