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).
Specification table for a Weston Box Instrument Model 163, detailing its electrical properties and connections.
| Identifier | ExFiles\Box 33\4\ Scan203 | |
| Date | 1st August 1932 | |
| -4- Description. Number and connections. Volt ranges. Ampere ranges. Resistances. (Ω) Remarks. 42 .0181 (at 15°C.) .0100 1.81 (at 15°C.) Instrument only. Weston Box. Instrument Model 163. .0181 (at 15°C.) .01525 1.185 (at 15°C.) Instrument shunted. 1.5 150 Internal volt coil box. 15 1500 150 15000 600 60000 1.5 .03135 Internal shunts. 15 .00341 Wiring Diagram Labels: 15, 1.5, motr., A, V, 600, 150, +, 1.5, 15, + R.R.28A.(100 T.S.) B.I.S.Ltd.(645) 8.32 | ||