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Portable Standard Voltmeter (AC)
| Catalogue Number | C0781 |
| Sub-categories | |
| Year of manufacture | 1934 |
| Location | Cupboard CI (Display 4) [Main Store] |
| Object Type | Test Equipment |
| Division | Unknown |
| Platform | |
| Manufacturer | |
| Part No | O.L. Moving Iron |
| Serial No | A13896 |
| Dimensions | Width (mm):200 Height (mm):100 Depth (mm):195 Weight (g):2623 |
| Inscription(s) | Portable Standard Voltmeter Type O.L. Moving Iron No. A13896 This instrument is calibrated in International Volts. It is correct at 68°F and, if properly used, its readings may be relied upon to within B.S. substandard at 50~ Resistance of 250V range: 2900 ohms. Temp. correction: Negligible Elliott Brothers (London) Limited, Century Works, Lewisham, S.E.13 Date 4th July 1934 |
| Notes | The Lewisham site of Elliott Bros (London) Ltd was established as Century Works in 1900. The factory made a range of electrical meters certainly as early as post WWI years. Portable instruments are standard test instruments used in electrical and electronics work. This Voltmeter’s moving-iron operation means the scale is non-linear with its first mark above zero being 20V, mid-scale being 150V and full-scale being 250V. The scale is marked with 5V minor and 10V major increments and has numerals at 20V, 50V, 100V, 150V, 200V & 250V. |
