U24-002-C-使用说明书手册

HOBOHOBO U24 Conductivity Logger (U24-002-C)ManualData LoggersThe HOBO U24 Conductivity logger(U24-002-C)measures actual conductivity andtemperature,and can provide specific conductance at 25'C and salinity with theHOBOware Conductivity Assistant.This easily deployable,rugged logger is ideal forenvironments with relatively small changes in salinity(,000 uS/cm),such as saltwaterbays,or to detect salinity events,such as upwelling,rainstorm,and discharge events.Thislogger can also be used to gather salinity data when deployed with a HOBO U26 DissolvedOxygen logger.An optional U2X Protective Housing accessory(HOUSING-U2X)is availableto further protect the logger,reduce fouling,and simplify mounting in harsh environments.SpecificationsMeasurementsActual Conductivity,Temperature,Specific Conductance at 25'C(calculated),Salinity (calculated using PSS-78,the PracticalSalinity Scale1978)】Conductivity MeasurementLow Range:100 to 10,000 uS/cmHOBO Conductivity LoggerRangesHigh Range:5,000 to 55,000 uS/cm;see Plots A and B on nextpage for salinity and specific conductance rangesModel:U24-002-CConductivity Calibrated5to35*C(41°to95F)】Range-Temperature RangeIncluded Item:Conductivity ExtendedLow Range:50 to 30,000 uS/cm.Communications windowRangesHigh Range:1,000 to 55,000 uS/cmprotective cap(readings below these ranges reported as 0)Required Items:Temperature Measurement-2°to36C(28°to97产F)Range.Coupler (COUPLER2-C)withUSB Optic Base Station (BASE-Specific ConductanceLow Range:3%of reading or 50 uS/cm,whichever is greaterU-4)or HOBO WaterproofAccuracy (in CalibratedHigh Range:5%of reading,in waters within a range ofShuttle (U-DTW-1)Range using Conductivity3,000 uS/cm of the calibration point;waters with greater.HOBOware Pro 3.2 or laterAssistant and Calibrationvariation can have substantially greater error (see Plot C)with the ConductivityMeasurements)Assistant 2.1 or laterConductivity Resolution2 uS/cm (typical).Conductivity meter forTemperature Accuracy0.1C(0.2℉)at25℃(77*F)calibration measurementsTemperature Resolution0.01℃(0.02F)Accessories:Conductivity DriftUp to 12%sensor drift per month,exclusive of drift from fouling.U2X Protective HousingMonthly start-and end-point calibration should be used with(HOUSING-U2X)HOBOware Conductivity Assistant to achieve the specified.Replacement communicationsSpecific Conductance accuracywindow protective caps(U22-U24-CAP)Response Time1 second to 90%of change (in water)Operating Range-2*to 36'C (28*to97"F)-non-freezingMemory18,500 temperature and conductivity measurements when usingone conductivity range;11,500 sets of measurements when usingboth conductivity ranges(64 KB total memory)Sample Rate1 second to 18 hrs,fixed or multiple-rate sampling with up to 8user-defined sampling intervalsdock Accuracy±1 minute per monthBattery3.6 Volt lithium batteryBattery Life3 years (at 1 minute logging)Maximum Depth70m(225t)Weight193 g(6.82 oz),buoyancy in freshwater:-59.8 g(-2.11 oz)Size3.18 cm diameter x 16.5 cm,with 6.3 mm mounting