Bante321 Portable Ion Meter 15Electrode Care and Maintenance• Ensure that the ion selective electrode is thoroughly washed with distilled water after use.• DO NOT scratch the sensitive membrane on electrode.• If you do not use the electrode for long periods, store the electrode in a dry, cool and well-ventilated area.TroubleshootingLCD DISPLAY CAUSE CORRECTIVE ACTIONElectrode has dried out Soak the ion selective electrode in 100ppm standard solution for 2 hours.Measured value is out of range Check the electrode whether clogged, dirty or broken.Incorrect calibration solutions Using the fresh calibration solutions for calibration.Electrode has expired Replace the electrode.Keypad is not working properly Replace the batteries.SpecificationsIonModel Bante321Range 0.001~19999ppm, mg/L, mol/L (Depending on the range of ISE)Accuracy ± 0.5% F.S (Monovalent), ± 1% F.S (Divalent)Resolution 0.001/0.01/0.1/1Calibration Points 2 to 5 pointsCalibration Solutions 0.001/0.01/0.1/1/10/100/1000/10000ppm, mol/L, mg/LmVRange -1999.9~1999.9mVAccuracy ± 0.2mVResolution 0.1/1mV, SelectableCalibration Points 1 point (Only for relative mV mode)TemperatureRange 0~105° C, 32~221° FAccuracy ± 0.5° CResolution 0.1° CCalibration Points 1 pointGeneralTemperature Compensation 0~100° C, 32~212° F, Manual or AutomaticMemory Stores up to 500 data setsOutput USB communication interfaceConnector BNCPower Requirements 3 × 1.5V “AA” batteriesDimensions 170 (L) × 85 (W) × 30 (H)mmWeight 300g