Hanna Instruments HI 9828 Instruction Manual

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12Since the Pt/PtO system depends on the pH, the pretreatment of the electrodemay be determined by the pH and the redox potential values of the solution to bemeasured.As a general rule, if the ORP (mV) reading corresponding to the solution pHvalue is higher than the values in the table below, an oxidizing pretreatment isnecessary; otherwise perform a reducing pretreatment.p Hp Hp Hp Hp H mVmVmVmVmV p Hp Hp Hp Hp H mVmVmVmVmV p Hp Hp Hp Hp H mVmVmVmVmV p Hp Hp Hp Hp H mVmVmVmVmV pHpHpHpHpH mVmVmVmVmV p Hp Hp Hp Hp H mVmVmVmVmV0 990 1 920 2 860 3 800 4 740 5 6806 640 7 580 8 520 9 460 10 400 11 34012 280 13 220 14 160For reducing pretreatment: immerse the electrode for a few minutes in HI 7091.For oxidizing pretreatment: immerse the electrode for a few minutes in HI 7092.1.5.2 Specifications of SensorsHI769828-0 HI769828-1 HI769828-2 HI769828-3Description pH pH/ORP D O ECMeasure Type pH, mV (pH) pH, mV (pH), mV DO (% sat. & conc.) EC, TDS,resistivity, salinityMeasure Range 0.00 to 14.00 0.00 to 14.00 0.0 to 500.0 % 0.000-200.000 mS/cm±600.0 mV (pH) ±600.0 mV (pH) 0.00 to 50.00 mg/L 0-400000 mg/L±2000.0 mV 0 to 1.0000 MΩ•cm0.00 to 70.00 PSUColor Code Red Red White BlueMaterials Tip: glass (pH) Tip: glass (pH); Pt (ORP) Cat/An: Ag/Zn Rings: Stainless steelJunction: cloth Junction: cloth Membrane: PTFE AISI 316Body: PEI Body: PEI Body: PVC Body: PVCElectrolyte: gel Electrolyte: gelReference: double Reference: doubleMaintenance HI 70300 HI 70300 HI 7042S -Solution (storage) (storage) (membrane refilling)Dimensions 100 x 14 Ø mm 100 x 14 Ø mm 101 x 16.5 Ø mm 111 x 14 Ø mm