{"product_id":"1930-tavo-meci-multimeter-with-avostat-23-39-by-siegfried-guggenheimer","title":"1930 Tavo Meci Multimeter With Avostat 23 \/ 39 by Siegfried Guggenheimer","description":"\u003ch1\u003e1930 Tavo Meci Multimeter With Avostat 23 \/ 39 by Siegfried Guggenheimer\u003c\/h1\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThis 1930 Tavo Meci Multimeter With Avostat 23 \/ 39 by Siegfried Guggenheimer is a real survivor and has an unusual history.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eMade by the German company, Siegfried Guggenhemier, (prior to becoming Metrawatt AG in 1933), this case of Tavo accessories was bought in 1930 in France for the Chief Engineer, (Mr V. Cockle), of Service\/Installations at Pathé:  a major film equipment and production company.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe instructions for using the multimeters is on a metal label, attached to the rear of the meters, and written in French. There is also an accompanying instruction booklet written in French: which is slightly grubby but intact.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe transit case is in fair condition with scuffs and tears in the surface covering. The actual multimeter accessories are in very good condition but have not been tested.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransit case size\u003c\/strong\u003e: - 24 x 22.5 x 7 cm \u003c\/p\u003e\n\u003cp\u003eThe chief engineer obviously didn't trust his colleagues as he has written his name and company address on the inside of the case!\u003c\/p\u003e\n\u003cp\u003eThe contents comprise the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAvostat 23 No. 423645: used for direct current for measuring current and voltage measurements\u003c\/li\u003e\n\u003cli\u003eAvostat 39 No. 423647: used for alternating \u003cspan data-mce-fragment=\"1\"\u003ecurrent for measuring current and voltage measurements\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003eTAVO MECI: moving coil movement; Direct current; \u003cbr data-mce-fragment=\"1\"\u003eScales: 0 ... 30 V= \/ 0 ... 120 V~ \/ 0 ... 30 V~ (non-linear scales)\u003c\/li\u003e\n\u003cli\u003e30A Shunt\u003c\/li\u003e\n\u003cli\u003e15A Shunt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFantastic collectible for those of us whom love \u003ca href=\"https:\/\/mullardantiques.co.uk\/collections\/vintage-technology-scientific-engineering-imaging-medical-equipment-instruments-tools\" target=\"_blank\"\u003evintage technology\u003c\/a\u003e!\u003c\/p\u003e\n\u003cp\u003ePlease click on the following link for \u003ca href=\"https:\/\/www.historische-messtechnik.de\/downloads\/dr.-s.-guggenheimer---tavo-1930-gebrauchsanwei.pdf\" target=\"_blank\"\u003ean instruction book written in German\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003e\n\u003cem\u003eAn \u003c\/em\u003e\u003ci\u003eEnglish Translation of an excerpt from the instructions: \u003c\/i\u003e\n\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eAvostat for direct current, namely those for current or voltage measurements and those for current and voltage measurements (Avo 21-29.)\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eTerminal designation a+nd - .\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eThe connection is made to the two terminals, namely for voltage measurements according to FIG. 2\/for current measurements according to FIG. 1, taking into account the terminal designations + and -. (See page 3.) If the pointer on the reading instrument deflects incorrectly, the two connections must be reversed.\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eThe reading is taken on scale I.\u003c\/em\u003e\u003cbr\u003e\u003cem\u003eThe values read off the scale are to be multiplied as follows for the different measuring ranges...\u003c\/em\u003e\u003c\/p\u003e","brand":"Siegfried Guggenheimer","offers":[{"title":"Default Title","offer_id":43222724837633,"sku":"","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0303\/5122\/8972\/products\/DSC04864_ced70a0d-b529-4561-852e-9daec55535d2.jpg?v=1661181656","url":"https:\/\/mullardantiques.co.uk\/en-us\/products\/1930-tavo-meci-multimeter-with-avostat-23-39-by-siegfried-guggenheimer","provider":"Mullard Antiques and Collectibles","version":"1.0","type":"link"}