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 and connection diagram for a Weston Instrument, Model 163.
| Identifier | ExFiles\Box 165\3\ img029 | |
| Date | 11th August 1930 | |
| -6- Description | Number and connection | Volt ranges | Ampere ranges | Resistance (w) | Remarks --- | --- | --- | --- | --- | --- Weston | 40 | .0168 (at 15°C.) | .00949 | 1.77 (At 15°C.) | Instrument only. Box | [Wiring Diagram with connections: Inst-, A, 1.5, 15, 150+, 1.5 15+] | .0168 (at 15°C.) | .01511 | 1.11 (at 15°C.) | Instrument shunted. Instrument. Model 163. | | 1.5 | X | 158 | Internal volt coil box. | | 15 | X | 1580 | | | 150 | X | 15800 | | | X | 1.5 | .0360 | Internal shunts. | | X | 15 | .00392 | Footer: R.R. 288A. 100 T. (S. H.{Arthur M. Hanbury - Head Complaints} 159. 11-8-30) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2808 | ||