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 sheet for a Weston Standard Milli-Volt-Ammeter.
| Identifier | ExFiles\Box 165\3\ img073 | |
| Date | 13th August 1929 | |
| Title: X.975 - ELECTRICAL EXPERIMENTAL DEPARTMENT INSTRUMENTS. X.1762. Handwritten Note: X6033 Table data: Column 'Description': Weston Standard Milli. Volt-Ammeter Column 'Number and Connections': 32901. [with two circuit diagrams] Column 'Volt ranges': (at 20°C) ±.075, 1.500, 15.00, 150.0 Column 'Ampere ranges': .011012, [X], .1500, 1.500, 15.00 Column 'Resistances. (Ω)': 6.811 (at 20°C), (Temp. coeffc. .196% per °C from 20°C.), .., 136.22, 1362.2, 13622. Column 'Remarks': Instrument only., Internal volt coils., External shunt box. | ||