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4.10 The ohmic drop compensation4.10.1 What is the ohmic drop?Principle of a potentiostatConsult the Help file, keyword index:Potentiostat.Ohmic drop (OD) - DefinitionThe ohmic drop (OD) is the <strong>product</strong> of the current which flows throughthe resistance of the electrolyte between the reference electrode and theelectrochemically active interface of the working electrode.How can the OD affect the measurements?Consult the Help file, keyword index:Ohmic drop (definition).Why is it necessary to compensate the OD?Consult the Help file, keyword index:Ohmic drop (definition).4.10.2 The ohmic drop compensation modesUsing VoltaMaster 4 with VoltaLab 06, 10, 40, 50 or 80, the ohmic dropcompensation can be performed in 5 ways:. “Feed back Manual”,. “Feed back Automatic”,. “Static Manual”,. “Static Automatic”,. “Dynamic”.The “Feed back Manual” compensation:Consult the Help file, keyword index:Feed back Manual (Ohmic drop compensation).The “Feed back Automatic” compensation:Consult the Help file, keyword index:Feed back Auto (Ohmic drop compensation).The “Static Manual” compensation:Consult the Help file, keyword index:Static Manual (Ohmic drop compensation).100VoltaMaster 4 - Version 7.0xSection 4, Chapter 10: The ohmic drop compensation
The “Static Automatic” compensation:Consult the Help file, keyword index:Static Manual (Ohmic drop compensation).The “Dynamic” compensation:Consult the Help file, keyword index:Dynamic (Ohmic drop compensation).4.10.3 Table of the R min/R max limits that can be compensateddepending on the type of compensation performed and thecurrent range in useCurrent range R min (in Ohms) R min (in Ohms) R min (in Ohms)R max (in Ohms) R max (in Ohms) R max (in Ohms)Feed back Auto & Manual Static Auto & Manual Dynamic1 µA 244 - 1 000 000 0 - 10 000 000 33300 - 4 000 00010 µA 24.4 - 100 000 0 - 1 000 000 3330 - 400 000100 µA 2.44 - 10 000 0 - 100 000 333 - 40 0001 mA 0.244 - 1000 0 - 10 000 33.3 - 400010 mA 0.0244 - 100 0 - 1000 3.33 - 400100 mA 0 - 10 0 - 100 0.333 - 401 A 0 - 1 0 - 10 Not possibleAutoranging Not possible 0 - 10 000 000 0.333 - 2 000 000Max scan rate 10 V/s 1 V/s 100 mV/sVoltaMaster 4 - Version 7.0x 101Section 4, Chapter 10: The ohmic drop compensation
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Register your product nowTo keep up
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ContentsRegister your product now 1
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1. General presentationDear Custome
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Precautionary LabelsRead all labels
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1.3 VoltaLab 21 Economical Electroc
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1.6 VoltaLab 40 Dynamic Electrochem
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1.8 VoltaLab 80 Universal Electroch
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Edit the Other settings parameters.
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2.5 Uninstalling VoltaMaster 4Volta
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3. Getting startedFor a VoltaLab 10
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For a VoltaLab 06RS232 cable9-pin f
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3.3 User identificationIf you selec
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3.5 Set up your instrumentIf you se
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3.7 Set up the Other settings param
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4. VoltaMaster 44.1 The VoltaMaster
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Curve type bar - XX is the abscissa
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4.2 Using the VoltaMaster 4 Help fi
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4.3.1 Open Circuit PotentialThe Ope
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Visual IFVA virtual front panel is
Page 49 and 50: 4.3.13 Pot. Dynamic EIS (Impedance)
Page 51 and 52: 4.3.17 Gal. Expert EIS (Impedance)T
Page 53 and 54: 4.3.22 Pot. Step by step CVStep by
Page 55 and 56: 4.3.28 Gal. Universal DPThe Gal. Un
Page 57 and 58: 4.3.34 Pot. Low Current CAA potenti
Page 59 and 60: 4.3.40 Auto. TrajectThe Auto. Traje
Page 61 and 62: 4.3.46 Standard calibrationThis met
Page 63 and 64: 4.3.47 Calibration by additionThis
Page 65 and 66: 4.3.53 Print ReportThe Print Report
Page 67 and 68: The following guidances are given i
Page 69 and 70: 8. Save the sequenceThe initial dat
Page 71 and 72: 4.5.1 Before starting a sequenceChe
Page 73 and 74: 4.6 Processing curves to obtain res
Page 75 and 76: 4.6.1 Post run processing functions
Page 77 and 78: InformationDisplay information on a
Page 79 and 80: Evans plotDisplay the Evans diagram
Page 81 and 82: 4.7 PrintoutsThe Printpreview iconV
Page 83 and 84: 4.7.3 Preparing a printoutThe “Fi
Page 85 and 86: 4.7.5 Printing the parameters of an
Page 87: 4.7.6 Printing CurvesA curve or an
Page 90 and 91: 1. 20 curves maximun in a graphYou
Page 92 and 93: 6. Current disjunctionEffectsThe po
Page 94 and 95: 11. Out of range: -15 V to 15 VWhil
Page 96 and 97: 17. Vg overloadThis error message i
Page 98 and 99: 4.9 Troubleshooting list4.9.1 Chara
Page 102 and 103: 4.10.4 Running an experiment with a
Page 104 and 105: CGgIPpQRSTZCalibration CV STGal. Un
Page 106 and 107: Menu “File” (Routine setup mode
Page 108 and 109: Menu “Settings” (Full and Super
Page 110 and 111: Menu “File” (Routine setup mode
Page 112 and 113: Menu “Settings” (Full and Super
Page 114 and 115: 5.1.1 The front panelsPGZ100 and PG
Page 116 and 117: The “D/A OUT” socket (4)A DC vo
Page 118 and 119: 5.1.2 The rear panelsLINE FUSE T2A
Page 120 and 121: 4 connecting cords are used (see th
Page 122 and 123: 5.1.4 UseThe PGZ and PST potentiost
Page 124 and 125: 5. Background noise on measurements
Page 126 and 127: 5.1.7 Technical specificationsPGZ10
Page 128 and 129: PGZ301 PotentiostatRegulationCompli
Page 130 and 131: PGZ402 Universal PotentiostatRegula
Page 132 and 133: PST006 Educational PotentiostatRegu
Page 134 and 135: 5.1.8 CE MarkingThe PGZ100, PGZ301,
Page 136 and 137: the PGP201 internal signal generato
Page 138 and 139: 5.2.2 The rear panelLI-BATTERY3.6 V
Page 140 and 141: 5.2.3 InstallationElectrical safety
Page 142 and 143: 2. Connecting the computerSee Secti
Page 144 and 145: 3. User data lost - Press any keyTh
Page 146 and 147: 5.2.6 MaintenanceWarning!All cables
Page 148 and 149: 5.2.8 CE MarkingThe PGP201 complies
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If the EDI10000 is used:ONE(X) INI
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3. To set another electrode rotatin
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Cables 1 to 4 are supplied in the C
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6.3 Rotating Ring and Disc Electrod
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PGZ TwoWORKAUXREFCell ringCell AUXC
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6.3.5 ConclusionIt is convenient an
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1 PGZ/PST050 “REF.” socket to t
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6.5.2 SettingsEstablish the serial
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166VoltaLab 21/06/10/40/50/80Sectio
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Determine the peak and integrate th
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Determine the peak and integrate th
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6.6 ABU901 AutoburetteThe ABU901 is
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RS232 cable9-pin female / 9-pin fem
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6.7.4 Set up your cellIf you run a
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6.7.8 Technical specifications - HV
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6.8 HCB005 - HCB010 - HCB020 High C
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RS232CLINE FUSE T2A L250V120/230 Va
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If it is not the case (communicatio
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6.8.5 Set up the other settingsSet
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Environmental conditionsInterior us
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6.9 Additional units - PGZ402 E(X)
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Check that the electrical zero and
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Click the “Settings” button and
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6.11 External signal generator - Vg
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6.12 Measuring an A/D IN signalUsin
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