astatic instrument, astatic measuring device, astatic electrical measuring instrument
mõõtevahend, mille mõõtemehanism on ehitatud nii, et seda ei mõjuta väline magnetväli, instrument in which the measuring mechanism is constructed with an astatic arrangement, reducing the influence of external magnetic fields to acceptable limits, measuring instrument in which the measuring element is, by design, unaffected by uniform magnetic fields of external origin
