The is a classic analog multimeter manufactured by I.C.E. (Industria Costruzioni Elettromeccaniche) . Various versions of the manual (ranging from Serie III to Serie VII) and technical guides are available as PDF downloads from several archival and specialized documentation sites. Manual PDF Downloads
If the needle doesn't return to zero or readings feel "off," the manual provides internal trimmer adjustment locations (though this should only be done by those with a steady hand). Conclusion supertester ice 680 r manual pdf