autoranging
/ˌɔːtə(ʊ)ˈreɪn(d)ʒɪŋ/noun
Automatic ranging; specifically the automatic selection by an instrument of the range most appropriate for the magnitude of the quantity being measured.
adjective
Of an instrument: having the facility of autoranging.
Origin
1950s; earliest use found in U.S. Patents. From auto- + ranging.