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).
Specifications and connection diagrams for a Weston Millivolt-Ammeter Model 1.
| Identifier | ExFiles\Box 165\3\ img025 | |
| Date | 11th August 1930 guessed | |
| -2- Description | Number and Connections | Volt ranges | Ampere ranges | Resistances (ω) | Remarks ---|---|---|---|---|--- Weston Milli-Volt-Ammeter Model 1. | 22407 [Hand-drawn circuit diagrams for Ammeter and Voltmeter connections] | .075 (at 18°C.) ±.0001 | .0145 | 5.18 (at 18°C.) | Instrument only. | | 1.5 | [Cell crossed out] | 109 | External volt coil box. (marked 22596) | | 15 | | 1090 | | | 150 | | 10900 | | | 600 | | 43600 | | | [Cell crossed out] | .15 | .490 | External shunts (marked 22596). | | | 1.5 | .0887 | | | | 15 | .00768 | | ||