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IM 12B03D01-01E

1-6

1. Outline

1.6 Sensors — Types, Part Names and Functions

Sensors available for use with the Model PH71 Personal pH Meter are: general-purpose
pH sensors (KCl replenish-free and KCl refillable types), needle type pH sensor, and test
tube size pH sensor. Check the Model and Suffix Code on the name plate to identify the
type of your sensor.

pH sensor for Personal pH/ORP meter

For PH71, PH72; KCl replenish-free type combination pH sensor (cable length: 0.75 m)

For PH71, PH72; KCl replenish-free type combination pH sensor (cable length: 3 m)

For PH81, PH82; KCl replenish-free type combination pH sensor (cable length: 0.75 m)

For PH81, PH82; KCl replenish-free type combination pH sensor (cable length: 3 m)

For PH71, PH72; KCl refillable type combination pH sensor (cable length: 0.75 m)

For PH71, PH72; KCl refillable type combination pH sensor (cable length: 3 m)

For PH81, PH82; KCl refillable type combination pH sensor (cable length: 0.75 m)

For PH71, PH72; needle type pH sensor (cable length: 0.75 m)
For PH71, PH72; test tube size pH sensor (cable length: 0.75 m)
For PH82; needle type pH sensor (cable length: 0.75 m)
For PH82; test tube size pH sensor (cable length: 0.75 m)
Always -AA

*

1

: Part number of PH81, PH82 (previous models).

*

2

: Waterproofing is not guaranteed if you use PH82-type sensor in conjunction with PH71 meter.

PH72SN
-11
-13
-18
-19
-21
-23
-28
-32
-33
-38
-39

-AA

Specification

K9220YA
K9220YB

K9220YC

K9220YG
K9220YJ

Remarks

Model Suffix Code

Example of Name Plate

Model and Suffix Code for pH Sensors

F010601.EPS

*

1

*

2

*

2

*

2

*

2

*

2

S1.0

000001

-11-AA

STYLE

Made in Japan

MODEL

SUFFIX

NO.

PH72SN

F010602.EPS

KCl replenish-free type combination pH sensor

Sensor body

Sensor grip

Sensor grip

Fill hole for KCl filling solution

Fill hole plug

Glass electrode

(Platinum electrode)

Glass electrode

Sensor cable

Waterproof cover

Connector

Name plate

KCl refillable type combination pH sensor

Wetting cap

Wetting cap

Sensor body

Sensor cable

Waterproof
cover

Connector

Name plate

Protective cover

Liquid
junction

Temperature element

Liquid junction

Temperature element

Prevents water ingress
that may cause
insulation failure.

Measures pH
values.

Removed only
during cleaning.

Measures solution temperature
and compensates for temperature
effect on pH electrode.

Used to prevent glass electrode from dying out. During storage this cap
with cotton wad moistened with water should be attached to electrode tip.

Connection to pH
meter.

Plastic body that can withstand
temperature up to 80

°

C.

Provides electrical contact
between internal reference
electrode and sample solution.

3.3 mol/l KCl solution is used.

Prevents filling solution from
leaking from fill hole during
storage. Always unplugged
during measurement.

Protective cover

*1

*1

*1

PH71 - 21 - - AA
PH71 - 23 - - AA

PH71 - 11 - - AA
PH71 - 13 - - AA

( PH72SN-11-AA,
PH72SN-13-AA )

*1

( PH72SN-21-AA,
PH72SN-23-AA )

*1: On the name plate of sensor, Model and Suffix Code of sensor itself (PH72SN- -AA) is indicated. (See Section 1.6.)

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Summary of Contents for PH71

Page 1: ...User s Manual IM 12B03D01 01E Model PH71 Personal pH Meter IM 12B03D01 01E 3rd Edition ...

Page 2: ...lectrical shock Do NOT touch any part of the electrode immediately after using in very hot liquids otherwise you may get burned CAUTION Do not apply physical shock or excessive force to the glass sensor or it may break If the meter will not be used for an extended period of time be sure to remove the batteries Otherwise battery leakage may occur causing damage to or malfunction of the meter The co...

Page 3: ...abet Display Alphabet Display Display Numerals F00 EPS All display segments Note Regarding Panels Shown in this Manual Panels shown in this manual should be regarded as examples Actual panel format may vary depending on parameter settings and on type of connected sensor Flashing Displays Flashing messages numbers and digits on the display are indicated in gray in this manual Flashing state Lit sta...

Page 4: ...epair or replacement at Yokogawa discretion to the service department of the relevant sales unit The following information must be included in a letter accompanying the returned items Model code and serial number Copy of original purchase order showing the date Length of time used and the measuring environment Fault symptoms and circumstances of failure Statement whether service under warranty or ...

Page 5: ... Display Functions 5 1 5 1 Keypad Functions 5 2 5 2 Display Items 5 4 5 3 Function Mode 5 5 6 Maintenance 6 1 6 1 For Optimum Meter Performance 6 1 6 2 pH Electrode Cleaning 6 2 6 3 Sensor Replacement 6 3 6 4 Rehydrating the Glass Electrode 6 3 6 5 Replenishing the Electrode with Filling Solution KCl solution 6 4 6 6 Cleaning and Drying Connectors 6 5 6 7 Storage and O ring Gasket Replacement 6 6 ...

Page 6: ...IM 12B03D01 01E 5 Contents 8 9 References 8 9 Appendix 1 MSDS Material Safety Data Sheet MADS 1 Revision Record i ...

Page 7: ...IM 12B03D01 01E 6 Contents ...

Page 8: ...Internal clock functions allow one touch checking of measurement date and time Data storage function Up to 300 measured pH values along with their respective solution temperatures dates and times can be stored and stored data can be checked on the display any time Auto power off function The meter will turn off power automatically if not operated during a preset time period The auto power off time...

Page 9: ... W x 42 D mm not including connector part Weight Approximately 220 g including batteries EMC Compliance EMI Emission EN 61326 1 Class B Test Item Electromagnetic radiation disturbance Frequency Range 30 to 1000 MHz Basic Standard CISPR 16 1 and 16 2 T0101 EPS EMS Immunity EN 61326 1 Table 2 For ise in industrial locations Test Item No 1 Electrostatic discharge Test Specification Basic Standard IEC...

Page 10: ...s and Functions and Section 1 6 Sensors Types Part Names and Functions Particular attention should be taken Not to lose a wetting cap attached on the sensor tip This cap is needed for storage Not to twist or pull the cable Not to hit or drop the meter Not to get connectors dirty In handling of standard solutions and reagents Solution bottles should be stored in a cool dark place and tightly capped...

Page 11: ...0 75 m With test tube size pH sensor cable length 0 75 m Japanese English Always AA PH71 Sensors 00 11 13 21 23 32 33 Label J language E AA Specification 1 to 6 in common plus None 7 11 12 13 14 7 11 12 13 14 8 11 12 13 14 15 16 8 11 12 13 14 15 16 9 11 12 13 14 15 16 10 11 12 13 14 15 16 Items Included Model Suffix Code 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 No Personal pH meter Dry batteries 2x ...

Page 12: ...unctions PERSONAL pH METER 2004 PH71 S1 0 E000001 MODEL No STYLE Sensor cable connector Display Keypad O ring Connection to a dedicated pH sensor pH and temperature simultaneously Hand strap attachment points Name plate Battery box cover fixing screw F010501 EPS ...

Page 13: ...cation K9220YA K9220YB K9220YC K9220YG K9220YJ Remarks Model Suffix Code Example of Name Plate Model and Suffix Code for pH Sensors F010601 EPS 1 2 2 2 2 2 S1 0 000001 11 AA STYLE Made in Japan MODEL SUFFIX NO PH72SN F010602 EPS KCl replenish free type combination pH sensor Sensor body Sensor grip Sensor grip Fill hole for KCl filling solution Fill hole plug Glass electrode Platinum electrode Glas...

Page 14: ...art number Sensor stand Part no K9220XN Soft carrying case Part no B9269KJ pH 9 Standard solution Part no K9220XF Holds a sensor when pH meter is used on the table Made of rustproof stainless steel Used for calibration when anticipated pH value of sample solution is alkaline 50ml A soft black carrying case holds pH meter and sensor Unit mm Approx 30 Approx 140 Approx 280 F010701 EPS ...

Page 15: ...tting cap F010801 EPS pH 9 Standard solution Part no K9084KH pH 7 Standard solution Part no K9084KG pH 4 Standard solution Part no K9084KF Used for calibration 250 ml Used for calibration 250 ml Used for calibration 250 ml Calibration bottle Part no K9220WW KCl solution Part no K9220XH Used during calibration 2 10 ml bottles Used to replenish KCl refillable type sensor 3 3 mol l 2 bottles x 50 ml ...

Page 16: ...01E 1 9 1 Outline O rings and gaskets are important parts to ensure that the PH71 meter is water resistant Replace these parts as required Refer to Section 6 7 Storage and O ring Gasket Replacement for replacement ...

Page 17: ...IM 12B03D01 01E 1 10 1 Outline ...

Page 18: ...amage the meter If the battery box gasket is damaged or dirty then the unit may no longer be waterproof replace the gasket in this case F020101 eps Press with your fingers Gasket Batteries 1 Loosen the screw holding the battery box cover using a coin or similar object 2 Remove the battery box cover and then install the batteries observing polarity diagram inside 3 Make sure the gasket on the insid...

Page 19: ... the connector cover F020201 eps O ring 1 Pull the waterproof cover along the sensor cable away from the connector to expose the locknut 2 Connect the connector to the meter body Then tighten firmly by turning only the locknut Align the slots of the sensor cable connector with the posts of the connector on the meter 3 Move the waterproof cover toward the connector until it contacts with the O ring...

Page 20: ...onnected Setting Procedure After installing the batteries press and hold POWER key for at least one second All LCD segments appears momentarily and then the date setting display starts automatically Set year month day hours and minutes following the flowchart below Note If you attempt to abort the setting procedure before completing the meter will beep three times and reject the attempt Continue u...

Page 21: ...g If a sensor without a built in temperature element needle type or test tube size pH sensor is connected to the meter mark will appear on the display In this case measure the temperature of the solution being measured and manually set the measured temperature into the PH71 meter for reliable measurement The procedure is described in Section 5 3 2 Manual temperature setting M tP panel Temperature ...

Page 22: ...or is connected for the first time after the sensor is replaced after the meter has been stored for a long period after the electrode is cleaned or when necessary The calibration procedure is described in Chapter 4 Calibration Note Calibration results are saved in the meter when the batteries are replaced ...

Page 23: ...IM 12B03D01 01E 2 6 2 Preparation ...

Page 24: ...s a solution containing hydrofluoric acid 4 Remove stains from the PH71 meter body using a soft cloth or tissue If necessary use a neutral detergent 5 If an abnormal symptom occurs during measurement locate the cause of the problem and take corrective actions referring to Chapter 7 Troubleshooting 6 After measurement rinse off dirt or the sample solution from the sensor with water and store it Ref...

Page 25: ...low Fill hole left open during measurement Protective cover Sample solution Level of sample solution KCl refillable type sensor must be immersed so filling solution level is above the level of sample solution Figure 3 2 How to Immerse the KCl Refillable Type Sensor Bubbles trapped in the glass electrode tip may interfere with accurate measurement Before taking measurements check the electrode tip ...

Page 26: ...panel Clock panel MEAS MEAS MEAS day month year Solution temperature pH value hour minute 3 4 Saving a Measured Value There are two ways to save a measured value holding temporarily and storing as a record in nonvolatile memory Measured values stored in nonvolatile memory are not deleted even by replacing the batteries 1 HOLD If HOLD key is pressed during measurement the currently measured value i...

Page 27: ...will be displayed If is displayed before the data number has reached 300 run defrag referring to Section 5 3 14 Defrag memory DFLG panel This will free up memory occupied by deleted data allowing data to be stored newly To check stored data refer to Section 5 3 1 Display stored data dAt panel Pressing DATA or MEAS key while mark is flashing cancels data storage and returns the meter to measurement...

Page 28: ...nto a calibration bottle supplied and use for calibration Do not reuse the portion Discard it and use a fresh portion for another calibration 2 Do not press CAL key unless calibration is needed Otherwise saved calibration results may be changed Before Calibration The following should be checked and set before calibration 1 Contamination of the sensor Make sure that no dirt or deposits are present ...

Page 29: ...standard solutions One point calibration is a simplified calibration method which can be used only when the anticipated pH values of sample solutions are near the certified pH value of a standard solution used for calibration Two point calibration is generally recommended Calibration results are not affected by turning off the power and saved until the next calibration or the initialization of cal...

Page 30: ...8 6 923 9 332 13 003 1 672 3 999 6 900 9 276 12 810 1 675 4 002 6 881 9 225 12 627 1 679 4 008 6 865 9 180 12 454 1 683 4 015 6 856 9 139 12 289 1 688 4 024 6 844 9 102 12 133 1 694 4 035 6 838 9 068 11 984 1 700 4 047 6 834 9 038 11 841 1 707 4 060 6 833 9 011 11 705 55 60 70 80 1 715 4 075 6 834 8 985 11 574 1 723 4 091 6 836 8 962 11 449 1 743 4 126 6 845 8 921 1 766 4 164 6 859 8 885 Std Solut...

Page 31: ...hing water from sensor thoroughly and then immerse sensor in standard solution Std sol Water Wash sensor with water thoroughly Wait until reading stabilizes Wipe off washing water from sensor thoroughly and then immerse sensor in standard solution to select auto calibration AUto After a few seconds After a few seconds to select auto calibration AUto The last two calibration results are saved in th...

Page 32: ...ete Standard solution temperature to enter standard solution temperature Std sol Water Wait until reading stabilizes Wipe off washing water from sensor thoroughly and then immerse sensor in standard solution to select auto calibration AUto After a few seconds Thermometer Wash sensor with water thoroughly or wash in water in beaker For 2 point calibration continue the procedure in the same way as E...

Page 33: ... using standard solutions the same as the ones preprogrammed for automatic calibration it only makes the procedure more complicated When using these standard solutions automatic calibration should be generally performed d Precautions 1 The difference between the pH values of two standard solutions to be used for 2 point calibration must be at least 0 7 pH If not the meter will recognize the two st...

Page 34: ...ensor thoroughly and then immerse sensor in standard solution to enter to confirm to select manual calibration MAn Wash sensor with water thoroughly or wash in water in beaker For 2 pont calibration continue the procedure following the dotted line When using a sensor without a built in temperature element needle type or test tube size pH sensor enter the temperature of standard solution following ...

Page 35: ...IM 12B03D01 01E 4 8 4 Calibration ...

Page 36: ...e Storing data pH value and associated information Function mode Calibration POWER Auto Power Off HOLD F ENT MEAS DATA F050001 EPS CAL Turns power on or off Automatic Power Off function default 20 min Moves to calibration mode Moves to measurement mode or switches measurement display panels Also exits from the current function and returns to measurement mode Changes setting or value Moves to funct...

Page 37: ...value and temperature are held Pressing HOLD or MEAS key will turn mark off and return the meter to measurement mode DATA DATA key When pressed during measurement mark flash and the currently displayed measured pH value and temperature are held temporarily Pressing F ENT key while mark is flashing will store the held data in memory After the data is stored successfully the meter returns to measure...

Page 38: ...key is also used to confirm data entry Beep sound When a key is pressed the meter acknowledges it using a beep sound 1 One beep The meter will beep once confirming a valid key entry 2 Three beeps The meter will beep three times if the key entry is invalid To disable the beep refer to Section 5 3 8 Set beep on off bZ o panel Note that the volume of the beep sound is not adjustable ...

Page 39: ...s being performed Refer to Section 5 3 2 Manual temperature setting M tp panel 3 Manual mode Appears when a sensor without a built in temperature element needle type or test tube size pH sensor is connected to the meter Refer to Section 2 6 Manual temperature setting 4 Data mode Appears when measured data are stored or when stored data are accessed Refer to Section 5 1 Keypad Functions and Section...

Page 40: ...s MEAS key anytime Table 5 1 Function Mode Item List Default 2 no dAtA 25 8C 2 2004 1 month 1 day 0 hour 0 minute oFF 20 min on nISt no 8C 2 2 For details refer to Item 1 Item 2 Item 3 Item 4 Item 5 Item 6 Item 7 Item 8 Item 9 Item 10 Item 11 Item 12 Item 13 T0501 EPS 1 For displayed digital characters see Alphanumeric Display Table in Preface 2 2 denotes that the item is not user configurable Ite...

Page 41: ...lashing Use keys to switch to flashing and then press F ENT key The stored data with the number to the left of dEL will be deleted Data Numbering after Deletion The number displayed at the bottom left indicates the stored data number relative to the beginning of the data store This number does not necessarily represent the number of stored data If a data item is deleted item numbers of data that f...

Page 42: ... F ENT F ENT F ENT F ENT F ENT DATA DATA DATA DATA DATA Stored measurement data to display other data Latest data Year data item was stored Day and month data item was stored Delete stored data panel Delete stored data Time data item was stored When no stored data ...

Page 43: ...or This setting is not required when a sensor connected has a built in temperature element The setting range is from 10 0 to 110 08C F050302 EPS to set to confirm F ENT F ENT 3 Delete all stored data dEL A panel Used to delete all stored data Press F ENT key on the flashing dEL A panel will be flashing Use keys to select Press F ENT key to delete all stored data completely F050303 EPS to proceed F...

Page 44: ...ENT key to confirm each entry F050304 EPS Year setting Month setting Day setting F ENT F ENT F ENT F ENT The calendar function will be valid through to year 2090 5 Time setting tIME panel Used to set the time hour 24 hour format and minute in this order Use keys to set the time and press F ENT key to confirm each entry F050305 EPS Hour setting 24 hr clock Minute setting F ENT F ENT F ENT ...

Page 45: ...setting the time for alarm The alarm sounds for about 15 seconds Acknowledge the alarm by pressing any key The alarm sound will stop If no key is pressed no acknowledgement the alarm sounds for 15 seconds again 3 and 6 minutes after the preset alarm time Note that the day of the week is not displayed F050306 EPS Hour setting 24 hr clock Minute setting alarm sounds at preset time every day alarm so...

Page 46: ...ess can be enabled disabled in this panel Use keys to select on or off and press F ENT key to confirm Note that this beep setting does not affect the alarm sounding See Item 6 F050308 EPS F ENT to turn ON enable F ENT to turn OFF disable F ENT 9 Standard solution setting Std panel Used to select the type of standard solutions NIST or US The factory default is NIST When using standard solutions pre...

Page 47: ... F050310 EPS to toggle to proceed F ENT to cancel F ENT to execute F ENT 11 Set temperature unit tP U panel Used to select the temperature unit Celsius 8C or Fahrenheit 8F Use keys to select the desired temperature unit and press F ENT key to confirm F050311 EPS to toggle F ENT to confirm F ENT 12 Check version number VEr panel Used to check the version number of the program This is not user confi...

Page 48: ...eted data thereby allowing up to 300 data to be stored While memory defrag is in progress do NOT turn off the power In addition before starting memory defrag check that there is enough battery life left to avoid battery shutoff during memory defrag Procedure Press F ENT key on the flashing dFLG display will be flashing Use keys to select then press F ENT key While defrag is in progress WAIt may fl...

Page 49: ...IM 12B03D01 01E 5 14 5 Keypad and Display Functions ...

Page 50: ...PS Calibration using standard solutions 1 or 2 point calibration 2 point calibration is recommended for accurate pH measurement Always use certified standard solutions pH 2 4 7 9 10 or 12 Sample solution requirements pH range 0 to 14 pH Temperature 0 to 808C 0 to 1008C when using needle type or test tube size pH sensor After measurement rinse off remaining sample solution from the electrode thorou...

Page 51: ...otton swab soaked with a neutral detergent and rinse off with water If necessary use a toothbrush to clean F0601 EPS Glass electrode Liquid junction Temperature element Figure 6 1 How to Clean Using a Toothbrush Chemical Contaminants Chemical contaminants can affect the electrode performance even though the electrode appears to be clean If appears on the display soak the electrode in dilute hydroc...

Page 52: ...ditions a sensor can be used for one or two years Sensor deterioration however speeds up depending on the nature of a sample solution e g a high temperature solution Storage conditions also affect the sensor life If or appears while calibration is being performed with a sensor for which is displayed replace the sensor 6 4 Rehydrating the Glass Electrode A dry glass electrode gives fluctuating pH r...

Page 53: ... little by little during measurement When the level of filling solution drops to the level shown in Figure 6 3 replenish with a 3 3 mol l KCl solution supplied CAUTION A syringe tip is sharp Handle with care F0603 EPS How to fill using syringe Fill hole for KCl solution Syringe supplied Filling solution level Protective cover Replenish when filling solution level drops to the level shown above 20m...

Page 54: ...ean the connector with a dry cloth or a cloth moistened with anhydrous alcohol If necessary use a dryer Wipe off stains and or moisture on meter connector with a dry cloth Check that there are no stains on the O ring O ring Hot air Use a dryer if necessary to remove moisture from connector of sensor cable F060601 eps CAUTION Use anhydrous alcohol to clean the connectors so no moisture remains Dry ...

Page 55: ...e O ring 3 Do not place any object on top of the sensor or on the top of the PH71 meter F0604 EPS Wetting cap Protective cover Attach wetting cap containing cotton wad moistened with a few drops of water For KCl refillable type sensor seal fill hole with plug Figure 6 4 Sensor Storage Condition Storage Location When not in use store the meter and sensor in a safe place If it is to be stored for a ...

Page 56: ...ical flat part of the connector as shown below O ring F060701 EPS 2 Replacing the Gasket Install the gasket on the groove on the battery box so the raised part fits in place as shown below The gasket is symmetrical right to left and front to back Gasket Raised part PH71 meter top F060702 EPS ...

Page 57: ...IM 12B03D01 01E 6 8 6 Maintenance ...

Page 58: ...ure If any trouble occurs determine the cause and take corrective actions referring to Section 7 2 If the trouble cannot be fixed contact your nearest Yokogawa sales office Symptom Expired consumables d Unstable reading d Abnormal reading d Error message d Electrode d Batteries Improper maintenance d Improper calibration d Stained electrode d Dry glass electrode d Deteriorated insulation of connec...

Page 59: ...sult is accepted when the variation of input emf for 10 seconds falls within 61 mV approximately 60 02 pH equivalent If the variation for 10 seconds cannot stabilize and is outside the range of 61 mV even after 3 minutes has elapsed in calibration an Err1 message will appear Possible Causes Dry electrode Clogged liquid junction Insulation failure in electronics Sensor immersed improperly Correctiv...

Page 60: ...uses Clogged liquid junction Insulation failure in electronics Improper standard solution Dirt or deposits on electrode Electrode filling solution has been depleted Expired battery life Electrode contaminated with standard solution Corrective Actions Remove dirt or deposits from the liquid junction See Section 6 2 Remove stain or moisture from the connectors See Section 6 6 Use properly prepared s...

Page 61: ...ction 6 2 Remove stain or moisture from the connectors See Section 6 6 Perform calibration within the calibration temperature range Set the temperature of the solution used manually and correctly See Section 5 3 2 4 Err4 Out of measuring range Appears during measurement The Model PH71 Personal pH Meter can measure the pH value of a solution in the range of 0 to 14 pH If the pH value of the solutio...

Page 62: ... for needle type or test tube size sensor 6 Err6 Meter electronics failure Possible Cause Failure of electronics Corrective Action Contact your nearest Yokogawa sales office 7 3 Causes of Abnormal Measured Values If error messages do not occur but measured values seem incorrect check the following Are proper standard solutions used Is the sensor connected to the meter securely Are air bubbles trap...

Page 63: ... improperly When it appears perform acid cleaning see Section 6 2 and recalibrate using fresh standard solutions appears This does not indicate any failure if a sensor without a built in temperature element a needle type or test tube size pH sensor is used If this mark appears manually set the temperature of a solution See Section 5 3 2 If it appears even though a sensor with a built in temperatur...

Page 64: ...tion A reference electrode has a constant potential irrespective of the pH of the test solution which is supported by potassium chloride KCl solution It prevents the reference electrode from making contact with the test solution but itself has electrical contact with the test solution through the liquid junction A voltmeter measures the potential difference between the electrodes As the membrane r...

Page 65: ...raday constant 9 6485310 C mol C potential at interface between glass and internal solution C potential at interface between glass and sample solution e 5 2 Where pH 1C internal solution side 2 3026 R T F 8 1 i i i e 5 2 pH 1C sample solution side 2 3026 R T F 8 2 S 4 i S S S Given the potential at internal solution side is reference the difference across the membrane eg is e 5 e 2e 5 pH 2pH 1 C 2...

Page 66: ...e solution side Hydrated layers on glass Boundary layers i e S e H H F0802 EPS Figure 8 2 Diagram of Glass Membrane 400 500 pH 2 0 E mV 300 200 100 0 100 200 300 400 500 4 6 8 10 12 14 F0803 EPS Alkaline error Figure 8 3 Relationship between Glass Electrode Potential and pH ...

Page 67: ... 69 08 70 07 71 07 72 06 73 05 74 04 T0801 EPS Table 8 1 presents the relationship between the temperature and the emf per pH unit and the relationship between the pH and the emf at each temperature is shown in Figure 8 4 Measurement without temperature compensation will result in measured pH values including errors as shown in Table 8 2 The PH71 meter automatically modifies the calibration line a...

Page 68: ...is different from the temperature compensation 8 4 The Asymmetry Potential Theoretically when identical buffer solutions pHi pHS are present on both sides of the membrane of a glass electrode the emf should be 0 mV In reality some potentials CS Ci develop depending on the thickness of the glass membrane heat treatment process service history or other factors This is called the real asymmetry poten...

Page 69: ...is likely to occur with the presence of sodium and lithium and even with the same pH it varies depending on the types and concentrations of cations and on the temperature Alkaline error Acid error EMF at pH 7 Theoretical value Slope difference 0 2 E mV 1 4 3 5 7 9 8 11 6 10 12 pH pHx F0805 EPS Figure 8 5 EMF Characteristics of Glass Electrode Test solution pH 9 0 20 40 60 Alkaline error mV 10 11 1...

Page 70: ... the glass membrane compositions and the types of acids It increases gradually with immersion time and finally reaches equilibrium Once a glass electrode has the acid error it cannot recover soon even by being soaked in a neutral solution and needs considerable time Practically the acid error is small compared to the alkaline error so that it is negligible pH 1 Acid error mV 0 10 30 50 1 3 F0808 E...

Page 71: ...ure 8 10 One point calibration is a simplified method where only the first calibration of 2 point calibration is performed Note A calibration point is the emf corresponding to the pH value of a standard solution used Refer to Table 4 1 pH0 pH14 F0809 EPS pH7 0mV mV mV Calibration line Theoretical line Calibration point Figure 8 9 Calibration at First Point pH0 pH14 pH7 0mV mV mV Second calibration...

Page 72: ...enish free type Rigid polyethylene sensor grip PVC sensor cable Ethylene propylene rubber sensor grip cable connection Needle type pH sensor Glass sensor Test tube size pH sensor Glass sensor 8 9 References JIS Z8802 1984 Methods for Determination of pH of Aqueous Solutions Moore W J Basic Physical Chemistry Prentice Hall Inc U S A 1983 Donald Andrzej Julian Electrochemistry for chemists 2nd Ed Ma...

Page 73: ...IM 12B03D01 01E 8 10 8 Technical Information ...

Page 74: ...e shown Refer to the corresponding section in the body of the manual for details T01 EPS POWER F ENT F ENT F ENT F ENT F ENT d When turn on power First time used or after replace batteries MEAS MEAS MEAS Toggle display type or HOLD HOLD MEAS d Temporary hold F ENT MEAS DATA DATA d Storing data ...

Page 75: ...IM 12B03D01 01E 2 Appendix F ENT T02 EPS F ENT F ENT DATA DATA DATA DATA F ENT d Function Mode or Display stored data F ENT Manual temperature setting F ENT ...

Page 76: ...te all stored data F ENT F ENT F ENT F ENT Date setting F ENT F ENT F ENT Time setting F ENT F ENT F ENT Alarm time setting F ENT F ENT Set Auto Power Off time d Switching to Function Mode d Reverting to Measurement Mode Measurement status Measurement status F ENT MEAS ...

Page 77: ...nction Mode d Function Mode T04 EPS F ENT F ENT Set beep on off F ENT F ENT Standard solution setting F ENT F ENT Initialize calibration parameters F ENT Check version number F ENT F ENT Defrag memory F ENT F ENT Set temperature unit ...

Page 78: ...l Auto calibration in progress Auto calibration is complete Standard solution temperature Prompting Manual calibration is complete Measurement status Measurement status Automatic calibration Manual calibration CAL Automatic calibration for needle type or test tube size pH sensor CAL Auto calibration in progress Auto calibration is complete 2 point calibration F ENT F ENT F ENT F ENT F ENT F ENT T0...

Page 79: ...IM 12B03D01 01E 6 Appendix ...

Page 80: ...as manufacturers in the data sheets is subject to change without notice Item MSDS Product Name Page Standard pH4 standard solution Phthalate standard solution MSDS 2 to 4 accessories pH7 standard solution Neutral phosphate standard splution MSDS 5 to 8 KCl filling solution Potassium chloride aqueous MSDS 12 to 15 Options pH9 standard solution Borate solution MSDS 9 to 11 T01 EPS ...

Page 81: ...IM 12B03D01 01E MSDS 2 MSDS ...

Page 82: ...IM 12B03D01 01E MSDS 3 MSDS ...

Page 83: ...IM 12B03D01 01E MSDS 4 MSDS ...

Page 84: ...IM 12B03D01 01E MSDS 5 MSDS ...

Page 85: ...IM 12B03D01 01E MSDS 6 MSDS ...

Page 86: ...IM 12B03D01 01E MSDS 7 MSDS ...

Page 87: ...IM 12B03D01 01E MSDS 8 MSDS ...

Page 88: ...IM 12B03D01 01E MSDS 9 MSDS ...

Page 89: ...IM 12B03D01 01E MSDS 10 MSDS ...

Page 90: ...IM 12B03D01 01E MSDS 11 MSDS ...

Page 91: ...IM 12B03D01 01E MSDS 12 MSDS ...

Page 92: ...IM 12B03D01 01E MSDS 13 MSDS ...

Page 93: ...IM 12B03D01 01E MSDS 14 MSDS ...

Page 94: ...IM 12B03D01 01E MSDS 15 MSDS ...

Page 95: ...IM 12B03D01 01E MSDS 16 MSDS ...

Page 96: ...IM 12B03D01 01E Edition Date Remark s 1st Oct 2004 Newly published 2nd Apr 2008 Addition of information on EMC compliance P 1 2 Addition of CAUTION P2 2 Correction P 1 1 2 1 6 2 1 2 4 2 5 3 1 5 4 6 1 7 6 8 4 8 6 8 7 3rd Aug 2009 Change of information on EMC compliance P 1 2 ...

Page 97: ... 기준 B급 기기 가정용 방송통신기자재 이 기기는 가정용 B급 전자파적합기기로서 주로 가정에서 사용하는 것을 목적으로 하며 모든 지역에서 사용할 수 있습니다 Environmental resistance Compliant with RoHS WEEE and EU battery directive RoHS conformity is after style S2 Products of style S1 needle type pH sensor of style S2 and test tube size pH sensor of style S2 do not compliant with RoHS How to dispose this product This directive is valid only in the EU This product ...

Page 98: ...r showing the date Length of time used and the measuring environment Fault symptoms and circumstances of failure Statement whether service under warranty or out of warranty service is requested Complete shipping and billing instructions for return of goods plus the name and phone number of a contact person who can be reached for further information Goods that have been in contact with process flui...

Page 99: ...edle type pH sensor cable length 0 75 m 1 With test tube size pH sensor cable length 0 75 m 1 Japanese English Global except South Korea and Malaysia with batteries South Korea and Malaysia without batteries 2 PH71 Sensors 00 11 13 21 23 32 33 Label J language E Country AA NB Specification 1 to 4 in common plus None 6 10 11 12 13 6 10 11 12 13 7 10 11 12 13 14 15 7 10 11 12 13 14 15 8 10 11 12 13 ...

Page 100: ...The following options are available for the Model PH71 Personal pH Meter for your convenience When ordering specify the part number pH 9 Standard solution Part no K9220XF Used for calibration when anticipated pH value of sample solution is alkaline 50mL F010701 ai ...

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