Yokogawa PH72 Personal pH/ORP Meter User Manual

User’sManualIM 12B03D02-01EModel PH72Personal pH/ORP MeterIM 12B03D02-01E3rd Edition

IM 12B03D02-01E1-31. Outline1.3 When You Receive the PH72 Meter PackageConfirm that you received all package components of the PH72 meter you ordere

IM 12B03D02-01EMSDS-15MSDS

IM 12B03D02-01EMSDS-16MSDS

IM 12B03D02-01EMSDS-17MSDS

IM 12B03D02-01EMSDS-18MSDS

IM 12B03D02-01EMSDS-19MSDS

IM 12B03D02-01EMSDS-20MSDS

IM 12B03D02-01EMSDS-21MSDS

IM 12B03D02-01EMSDS-22MSDS

Revision RecordManual Title : Model PH72 Personal pH/ORP MeterManual Number : IM 12B03D02-01EEdition Date Remark (s)1st Oct. 2004 Newly published2nd

IM 12B03D02-01E1-41. Outline1.4 PH72 Meter KitPH4PH7KCl13 1416151712Instrument Card78 11910125643Quick ManualNote: On the name plate of sensor, Mode

IM 12B03D02-01E1-51. Outline1.5 PH72 Meter — Part Names and FunctionsPERSONAL pH/ORP METER2004.PH72S1.0E000001MODELNo.STYLESensor cable connectorDi

IM 12B03D02-01E1-61. Outline1.6 Sensors — Types, Part Names and FunctionsSensors available for use with the Model PH72 Personal pH/ORP Meter are: ge

IM 12B03D02-01E1-71. OutlineF010602.EPSKCl replenish-free type combination pH sensorSensor bodySensor gripSensor gripFill hole for KCl filling soluti

IM 12B03D02-01E1-81. Outline1.7 Options (Available Separately)The following options are available for the Model PH72 Personal pH/ORP Meter foryour c

IM 12B03D02-01E1-91. Outline1.8 Spare PartsO-ring and gasket set(Part no. : K9654AY)2 gaskets for battery box2 O-rings for connectorCap set(Part no.

IM 12B03D02-01E1-101. OutlineO-rings and gaskets are important parts to ensure that the PH72 meter is water resistant.Replace these parts as required

IM 12B03D02-01E2-12. Preparation2. Preparation2.1 Installing the BatteriesInstall the batteries first.CAUTIONSelect a relatively moisture-free loca

IM 12B03D02-01E2-22. Preparation2.2 Connecting the Sensor CableConnect the sensor cable.CAUTIONConnect the sensor cable in a place free from moistur

1PrefaceIM 12B03D02-01E3rd Edition: Apr. 2009 (YK)All Rights Reserved, Copyright © 2004, Yokogawa Electric CorporationPrefaceThank you for purchasing

IM 12B03D02-01E2-32. Preparation2.3 Setting the Date and TimeAfter installing the batteries, set the date and time. Note that if the power is turned

IM 12B03D02-01E2-42. Preparation2.4 Selecting pH or ORP MeasurementUpon completing the date and time setting, the meter is ready for pH measurement.

IM 12B03D02-01E2-52. Preparation2.6 Manual Temperature SettingIf a sensor without a built-in temperature element (needle type or test tube size pHse

IM 12B03D02-01E2-62. Preparation

IM 12B03D02-01E3-13. Measurement3. Measurement3.1 Precautions(1) After storage for an extended period of time, it is recommended that the metershou

IM 12B03D02-01E3-23. Measurement3.2 Measurement ProceduresImmersing the sensorImmerse the sensor so that the protective cover part goes under the sa

IM 12B03D02-01E3-33. Measurement3.3 Measurement Display PanelWhen immersing the sensor in a sample solution, a measured pH (or mV) value will beshow

IM 12B03D02-01E3-43. Measurement(2) Data storageIf the DATA key is pressed during measurement, mark starts flashing. Press theF/ENT key, then curre

IM 12B03D02-01E4-14. Calibration4. CalibrationCalibration using standard solutions means to measure the pH value of a certifiedstandard solution and

IM 12B03D02-01E4-24. CalibrationError Messages during CalibrationIf the meter detects an abnormality during calibration, , , or may be displayed.

IM 12B03D02-01E2PrefaceLiquid Crystal Display (LCD) CharactersOn the LCD alphanumeric characters are displayed as follows.9876543210ZYXWVUTSRQPONMLKJI

IM 12B03D02-01E4-34. Calibration4.1 Automatic CalibrationIn automatic calibration the Model PH72 Personal pH/ORP Meter automaticallyrecognizes stand

IM 12B03D02-01E4-44. Calibrationd ProcedureExample 1: 2-point calibration using pH 7 and pH 4 standard solutionsF0401.EPSPOWERCALCALAuto calibration

IM 12B03D02-01E4-54. CalibrationExample 2: Calibration of a sensor without a built-in temperature element* using a pH7 standard solution* Needle type

IM 12B03D02-01E4-64. Calibration4.2 Manual CalibrationWhen using standard solutions other than those preprogrammed for automatic calibration(see Sec

IM 12B03D02-01E4-74. Calibrationd ProcedureExample 3: Manual calibrationF0403.EPSPOWERCALPromptingF/ENTF/ENTManual calibration is complete(2-point ca

IM 12B03D02-01E4-84. Calibration

IM 12B03D02-01E5-15. Keypad and Display Functions5. Keypad and Display FunctionsThere are eight membrane keys on the keypad of the Model PH72 Person

IM 12B03D02-01E5-25. Keypad and Display Functions5.1 Keypad FunctionsPOWER: Power On/Off keyPressing and holding this key for at least one second wh

IM 12B03D02-01E5-35. Keypad and Display FunctionsF/ENT: Entry keyPressing this key during measurement moves the display to function mode. (Refer toSe

IM 12B03D02-01E5-45. Keypad and Display Functions5.2 Display ItemsDisplay items and their descriptions are provided below.F050201.EPSBattery conditi

IM 12B03D02-01E3PrefaceWarranty and ServiceYokogawa products and parts are guaranteed to be free from defects in workmanship andmaterials under normal

IM 12B03D02-01E5-55. Keypad and Display Functions5.3 Function ModeOutlineVarious functions are supported by function mode. Press F/ENT key while the

IM 12B03D02-01E5-65. Keypad and Display FunctionsOperating procedures on each panel are described below.(1) Display stored data (dAt) panelShows stor

IM 12B03D02-01E5-75. Keypad and Display FunctionsF050301.EPSF/ENTF/ENTF/ENTF/ENTF/ENTDATA DATADATADATADATAStored measurement datato display other dat

IM 12B03D02-01E5-85. Keypad and Display Functions(2) Manual temperature setting (M.tP) panelUsed to input the temperature of a solution into the mete

IM 12B03D02-01E5-95. Keypad and Display Functions(5) Date setting (dAtE) panelUsed to set the year (four digits), month and day in this order. Use

IM 12B03D02-01E5-105. Keypad and Display Functions(7) Alarm time setting (ALM) panelUsed to enable/disable the alarm clock and set the alarm clock in

IM 12B03D02-01E5-115. Keypad and Display Functions(8) Set Auto Power Off time (A.oFF) panelUsed to set the automatic power off time. The meter turns

IM 12B03D02-01E5-125. Keypad and Display Functions(11) Initialize calibration parameters (I.CP) panelUsed to initialize the parameters saved by calib

IM 12B03D02-01E5-135. Keypad and Display Functions(14) Defrag memory (dFLG) panelUp to 300 data can be stored. Unnecessary data can be individually d

IM 12B03D02-01E5-145. Keypad and Display Functions

IM 12B03D02-01E4ContentsCONTENTSPreface ...

IM 12B03D02-01E6-16. Maintenance6. Maintenance6.1 For Optimum Meter PerformanceThe Model PH72 Personal pH/ORP Meter is simple to operate, but is a

IM 12B03D02-01E6-26. Maintenance6.2 pH Electrode CleaningDirt or deposits on the glass electrode or liquid junction can often interfere with accurat

IM 12B03D02-01E6-36. MaintenanceF0602.EPSSoak in 0.1 mol/l hydrochloric acid0.1 mol/l dilute hydrochloric acidCleaning waterAfter 10 to 20 minutesRin

IM 12B03D02-01E6-46. Maintenance6.5 Replenishing the Electrode with Filling Solution (KClsolution)Replenishment is required only when a KCl refillab

IM 12B03D02-01E6-56. Maintenance6.6 Cleaning and Drying ConnectorsDeteriorated insulation between connector pins can cause inaccurate readings. To r

IM 12B03D02-01E6-66. Maintenance6.7 Storage and O-ring/Gasket Replacement• Storage PrecautionsCare is required when storing the meter and sensor. To

IM 12B03D02-01E6-76. Maintenance(1) Replacing the O-ringInstall the O-ring on the cylindrical flat part of the connector, as shown below.O-ringF06070

IM 12B03D02-01E6-86. Maintenance

IM 12B03D02-01E7-17. Troubleshooting7. Troubleshooting7.1 Causes of Abnormal Readings and ErrorsIf the pH reading is unstable or abnormal, or an er

IM 12B03D02-01E7-27. Troubleshooting7.2 Error Messages, Possible Causes, and Corrective ActionsTable 7.1 Error MessageT0701.EPSError Message*1Err1Er

IM 12B03D02-01E5Contents9.3 Temperature Compensation ... 9-49.

IM 12B03D02-01E7-37. Troubleshooting(2) Err2 Abnormal asymmetry potentialAppears during calibration.A sensor deteriorates in service and the emf devi

IM 12B03D02-01E7-47. Troubleshooting(3) Err3 Abnormal slope or calibration temperatureAppears during calibration.In the Model PH72 Personal pH/ORP Me

IM 12B03D02-01E7-57. Troubleshooting(5) Err5 Out of temperature measuring rangeAppears during measurement.With the Model PH72 Personal pH/ORP Meter,

IM 12B03D02-01E7-67. Troubleshooting7.4 Other Conditions• An alarm soundsThe alarm is set to sound at the preset alarm time. Refer to Section 5.3 (7

IM 12B03D02-01E8-18. ORP Meter8. ORP Meter8.1 ORP MeasurementUse a dedicated ORP sensor for ORP (oxidation-reduction potential) measurement. TheORP

IM 12B03D02-01E8-28. ORP Meter8.2 Maintenance of ORP SensorsMaintenance of ORP sensors is in accordance with that of pH sensors. (Refer to Chapter6,

IM 12B03D02-01E8-38. ORP Meter8.3 Checking the ORP SensorUse a check solution to verify that the ORP sensor operates properly. The oxidation-reducti

IM 12B03D02-01E8-48. ORP Meter40030020010000 10 20 304050Temperature (8C)Oxidation-reduction potential (mV)Quinhydrone solutionToleranceF0802.EPSFigu

IM 12B03D02-01E9-19. Technical Information9. Technical Information9.1 Measurement Principle of pH Meter (Glass ElectrodeMethod)A pH meter makes use

IM 12B03D02-01E9-29. Technical Information9.2 Relationship between EMF of Glass Membrane and pHValueThe relationship between the potential differenc

IM 12B03D02-01E6Contents

IM 12B03D02-01E9-39. Technical InformationInternal solution sideSample solution sideHydrated layers on glassBoundary layersieSeH+H+F0902.EPSFigure 9.

IM 12B03D02-01E9-49. Technical Information9.3 Temperature CompensationIn equation 9.3, 2.3026RT/F represents the emf per pH unit and varies dependin

IM 12B03D02-01E9-59. Technical InformationTable 9.2 Deviations from True Values in Measurement withoutTemperature Compensation1 3 5 7 9 11 130.50 0.3

IM 12B03D02-01E9-69. Technical Information9.5 The Alkaline ErrorAs shown in Figure 9.5, the emf of a glass electrode deviates from the linear value

IM 12B03D02-01E9-79. Technical InformationTest solution pH90204060Alkaline error (mV)101113 14F0907.EPS12Solution temperature at 258C3mol/l-Na+1mol/l

IM 12B03D02-01E9-89. Technical Information9.7 Calibration CalculationThe PH72 meter is calibrated at 2 points using 2 standard solutions. The first

IM 12B03D02-01E9-99. Technical Information9.8 ORP (Oxidation-Reduction Potential)In general, oxidation is the gain of oxygen or the loss of hydrogen

IM 12B03D02-01E9-109. Technical Information9.9 Reference ElectrodeThe oxidation-reduction potential in measurement is a value relative to the refere

IM 12B03D02-01E9-119. Technical InformationObtained from equation 9.10, the potential of the Ag/AgCl electrode filled with a 3.3mol/l KCl solution, E

IM 12B03D02-01E9-129. Technical Information9.10 Wetted Part Materials of Sensors• General pH SensorsPolypropylene resin (sensor body, protective cov

IM 12B03D02-01E1-11. Outline1. OutlineThe Model PH72 Personal pH/ORP Meter is a highly accurate, portable pH meter forlaboratory and field applicati

IM 12B03D02-01E1AppendixAppendixKey-Operation Flow Chart (for reference)Typical screens are shown. Refer to the corresponding section in the body of

IM 12B03D02-01E2AppendixF/ENTT02.EPSF/ENTF/ENTDATADATADATADATAF/ENTd Function ModeorDisplay stored dataF/ENTManual temperature settingF/ENT F/ENTF/ENT

IM 12B03D02-01E3AppendixT03.EPSd Function ModeF/ENTF/ENTDelete all stored dataF/ENTF/ENTF/ENTF/ENTDate settingF/ENTF/ENTF/ENTTime settingF/ENTF/ENTF/E

IM 12B03D02-01E4Appendixd Function Moded Function ModeT04.EPSF/ENTF/ENTSet beep on/offF/ENTF/ENTStandard solution settingF/ENTF/ENTInitialize calibrat

IM 12B03D02-01E5Appendixd CalibrationInput of standard solution temperatureManual calibrationAuto calibrationAuto calibration25.08C fixedTemperature s

IM 12B03D02-01E6Appendix

IM 12B03D02-01EMSDS-1MSDSMSDS (Material Safety Data Sheet)The contents are provided for informative purposes only and no guarantee is given to theaccu

IM 12B03D02-01EMSDS-2MSDS

IM 12B03D02-01EMSDS-3MSDS

IM 12B03D02-01EMSDS-4MSDS

IM 12B03D02-01E1-21. Outline1.2 SpecificationsMeasuring range: pH: 0 to 14 pH*1ORP: -2000 to 2000 mVTemperature: 0 to 1008C*2Resolution: pH: 0.01 pH

IM 12B03D02-01EMSDS-5MSDS

IM 12B03D02-01EMSDS-6MSDS

IM 12B03D02-01EMSDS-7MSDS

IM 12B03D02-01EMSDS-8MSDS

IM 12B03D02-01EMSDS-9MSDS

IM 12B03D02-01EMSDS-10MSDS

IM 12B03D02-01EMSDS-11MSDS

IM 12B03D02-01EMSDS-12MSDS

IM 12B03D02-01EMSDS-13MSDS

IM 12B03D02-01EMSDS-14MSDS