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).
The 'MEG' Insulation Tester and its canvas carrying case.
| Identifier | ExFiles\Box 165\3\ img039 | |
| Date | 1st October 1922 guessed | |
| 6 EVERSHED & VIGNOLES, LIMITED. having an ohmmeter reading 0 to 100 megohms. Each scale is separately calibrated and is clearly marked in black on a white background, as is shown in the plan view of the instrument (Fig. 3). Text on the Instrument Faceplate: INSULATION MEG TESTER 500 VOLTS. FOR THE INSULATION TEST CONNECT THE LINE AND EARTH TERMINALS TO THE CIRCUIT TO BE TESTED. FOR CONTINUITY TEST CONNECT THE TWO TERMINALS TO THE CIRCUIT TO BE TESTED AND READ ON Ω SCALE. IMPORTANT:-BEFORE MAKING AN INSULATION TEST SEE THAT THE CIRCUIT IS NOT ALIVE. MADE IN ENGLAND BY EVERSHED & VIGNOLES LD. ACTON LANE WORKS. CHISWICK. LONDON. W.4 FIG. 3. The MEG Insulation Tester. (Regd. Design) Open for use, and seen in plan. Canvas Case The instrument is sold with a light carrying case of stiffened canvas, as shown in Fig. 4, having a strap by which it may be carried in the hand or slung from the shoulder. This case provides space for leads, small tools, and on occasion for a packet of sandwiches. ACTON LANE WORKS, CHISWICK. 7 FIG. 4. The MEG Insulation Tester. in Canvas Case. Conclusion Once more we have broken new ground and put new facilities at the disposal of producers and users of electricity. The novel and striking qualities of the MEG Insulation Tester will, we are convinced, lead to its immediate employment on a large scale. Two objections only have ever been urged against the Megger Testing Set—the standard instrument—firstly, that its weight was irksome when it had to be carried long distances, and, secondly, that its price made its acquisition difficult for the man with a small business. To those with whom these objections have had force, the MEG Insulation Tester will make an irresistible appeal. | ||