@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix grg: . @prefix iop: . @prefix ns0: . @prefix ns1: . @prefix owl: . @prefix pav: . @prefix prov: . @prefix puv: . @prefix qudt: . @prefix rdf: . @prefix rdfs: . @prefix reg: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . skos:member . skos:altLabel "YSI Model 30/30M" , "YSI Model 30/30M"@en ; skos:broader , , ; skos:definition "A handheld instrument designed for measurement of salinity, conductivity and temperature in water. It has three operation modes: a) measurement of conductivity without regard to temperature; b) measurement of specific conductance (also known as temperature-compensated conductivity), with adjustable reference temperature set to 25 degC by default; c) salinity calculation based upon conductivity and temperature readings. The probe utilises a cell with four nickel electrodes for the measurement of solution conductance; two of the electrodes are current-driven, and two are used to measure the voltage drop. The measured voltage drop is then converted into a conductance value in millisiemens. YSI Models 30 and 30M operate in the same way, except that Model 30M has a 30.5m cable length and an internal memory capable of saving 50 sets of data. YSI Model 30 can operate within depth ranges of 0 m - 3 m, 0 m - 7.6 m, or 0 m - 15.2 m, depending on cable length; YSI Model 30M operates within 0 - 30.5 m depth."@en ; skos:inScheme ; skos:notation "SDN:L22::TOOL1136" ; skos:note "accepted"@en ; skos:prefLabel "YSI Model 30/30M Salinity, Conductivity and Temperature System"@en ; skos:related . skos:related . skos:narrower . skos:narrower . skos:narrower . skos:narrower . skos:narrower . skos:narrower . skos:related .