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).
Page detailing the electrical connections and maintenance for a Densitometer Illuminator.
| Identifier | ExFiles\Box 168a\3\ img517 | |
| Date | 1st May 1950 guessed | |
| Fig. 7. Supplementary Lens Attachment, about twice actual size, showing side window open as it would be for reflection density work. Fig. 8. External Supply Adaptor Fig. 9. Barrel of External Supply Adaptor removed to show lamp Electrical connections and maintenance DENSITOMETER ILLUMINATOR Connection to A.C. mains is provided by a length of 3-core flex carrying the usual earthing wire. This flex is led through one end of the illuminator and held by a rubber fairlead ring (Fig. 2) and is connected to a panel on the illuminator transformer. To obtain access to this panel, give a half turn anticlockwise to the slot-headed fastening clamp on the bottom of the box and lift off the top of the box. It will be necessary to push the main supply lead inwards in order to lift the lid{A. J. Lidsey} of the box far enough to get at the transformer panel. Fig. 10. Transformer panel wired as supplied. In the instrument as sent out the internal connections to the transformer are made to the 240 volt terminals as shewn in Fig. 10, but the transformer will work satisfactorily at any voltage between 200 and 250 volts without altering these connections. If the mains voltage is 110 or 120 volts (or if it is desired to modify the wiring when working at voltages between 200 and 250 volts) the connections to the transformer should be made as shewn in the table below. TABLE A.C. supply voltage | Terminals for mains lead connections Red | Black | Green 110V | 110V | 0V | Frame 120V | 110V | 10V | Frame 200V | 200V | 0V | Frame 210V | 200V | 10V | Frame 220V | 220V | 0V | Frame 230V | 220V | 10V | Frame 240V | 240V | 0V | Frame 250V | 240V | 10V | Frame 9 | ||