Thermo Products REDOX/ORP 9678BNWP User Manual

Thermo Fisher ScientificEnvironmental InstrumentsWater Analysis Instruments 166 Cummings CenterBeverly, MA 01915 USATel: 978-232-6000Toll Free: 800-22

8 Redox/ORP Electrode User GuideMeasurement Techniques• Always use fresh ORP standard for calibration. • If the electrode is refillable, remove the

9Redox/ORP Electrode User GuideElectrode MeasurementsDirect MeasurementsDirect oxidation-reduction potential (ORP) measurements can be used to determi

10 Redox/ORP Electrode User GuideOxidation-Reduction TitrationsOxidation-reduction or redox titrations provide a simple, reliable method for determini

11Redox/ORP Electrode User Guide6. Calculate the normality of the sample, Nx, in equivalents per liter. Nx = (Vt * Nt) / Vxwhere: Nt = normalit

12 Redox/ORP Electrode User GuideTable 2– Typical Redox Titration MethodsUnknown Interferencesantimony (Sb+3) As, Fe, SO2, V, and organic substancesa

13Redox/ORP Electrode User GuideSuitable Titrants Titration Reaction Refpotassium permanganate (KMnO4)5Sb+3 + 2MnO4¯ + 16H+ –› 5Sb+3 + 2Mn+2 + 8H2O2so

14 Redox/ORP Electrode User GuideElectrode Maintenance1. Inspect the electrode for scratches, cracks, salt crystal buildup, or membrane/junction de

15Redox/ORP Electrode User GuideElectrode Cleaning ProceduresGeneral Cleaning1. Soak the electrode in 0.1 M HCl or HNO3 for half an hour. The electr

16 Redox/ORP Electrode User GuideSure-Flow Electrode Cleaning Cat. No. 9678BNWP and 967800If the area between the electrode sleeve and inner cone beco

17Redox/ORP Electrode User GuideReassembling the Sure-Flow Electrode1. Moisten the O-ring on the electrode body with a drop of filling solution. Inse

18 Redox/ORP Electrode User GuideTroubleshootingFollow a systematic procedure to isolate the problem. The measuring system can be divided into four c

19Redox/ORP Electrode User GuideChecking Electrode OperationChecking the electrode is necessary only when there is evidence of malfunction that cannot

20 Redox/ORP Electrode User GuideOrdering InformationCat. No. Description 9179BNMD Low maintenance gel ORP/ATC Triode with epoxy body and waterproof

Thermo Fisher ScientificEnvironmental InstrumentsWater Analysis Instruments 166 Cummings CenterBeverly, MA 01915 USATel: 978-232-6000Toll Free: 800-22

1Redox/ORP Electrode User GuideIntroductionThis user guide contains information on the preparation, operation and maintenance of the Thermo Scientific

2 Redox/ORP Electrode User GuideRequired Equipment1. Thermo Scientific Orion pH/mV meter, such as the 3-Star pH meter, 4-Star pH/ISE meter, 4-Star pH/

3Redox/ORP Electrode User GuideSample RequirementsElectrodes with an epoxy body should only be used in aqueous solutions.Electrodes with a glass body

4 Redox/ORP Electrode User GuideElectrode PreparationElectrode Preparation for Refillable Electrodes 1. Remove the protective shipping cap from the s

5Redox/ORP Electrode User Guidefilling holeAg/AgClinternalreferencefillingsolutionchamberceramic referencejunctionsensingelementfill holeAgAgClinternalre

6 Redox/ORP Electrode User GuideElectrode CalibrationORP readings can be reported using the absolute mV values or the EH mV values. EH mV values give

7Redox/ORP Electrode User GuideTemperature (°C)EH Value (mV)Absolute Value with Cat. No. 900011 Filling Solution (mV)Absolute Value with Cat. No. 900