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 Milli-Volt-Ammeter, Model 1.
| Identifier | ExFiles\Box 33\4\ Scan202 | |
| Date | 1st August 1932 guessed | |
| -3- | Description. | Number and connections. | Volt ranges. | Ampere ranges. | Resistances (Ω) | Remarks. | |---|---|---|---|---|---| | Weston Milli-Volt-Ammeter. Model 1. | 22596 | .075 (at 18°C) Correct at 2/3 scale = .050 | .01464 Correct at 2/3 scale = .00976 | 5.12 (at 18°C) | Instrument only. | | | [Circuit diagram showing connections for terminals 600, 150, 15, 1.5, Inst] | Normal. 1.5 15 150 600 | X | | External volt coil box. | | | [Circuit diagram showing external shunts] | X | .15 1.5 15 150 600 | .497 .0880 .00707 .00104 .00021 | External shunts. | | ||