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IM 12B03D02-01E

1-6

1. Outline

1.6 Sensors — Types, Part Names and Functions

Sensors available for use with the Model PH72 Personal pH/ORP Meter are: general-
purpose pH sensors (KCl replenish-free and KCl refillable types), needle type pH sensor,
test tube size pH sensor, and KCl refillable type ORP 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 PH72 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 and ORP Sensors

F010601.EPS

*

1

*

1

*

2

*

2

*

2

*

2

*

2

*

2

ORP sensor for Personal pH/ORP meter
For PH72; KCl refillable type ORP sensor (cable length: 0.75 m)
For PH72; KCl refillable type ORP sensor (cable length: 3 m)
For PH82; KCl refillable type ORP sensor (cable length: 0.75 m)
For PH82; KCl refillable type ORP sensor (cable length: 3 m)
Always -AA

OR72SN

-41

-43

-48

-49

-AA

Specification

K9220YL

Remarks

Model Suffix Code

*

2

S1.0

000001

-11-AA

STYLE

Made in Japan

MODEL

SUFFIX

NO.

PH72SN

«
...
11
12
13
14
15
...
»

Содержание PH72-21-E-AA

Страница 1: ...User s Manual IM 12B03D02 01E Model PH72 Personal pH ORP Meter IM 12B03D02 01E 3rd Edition...

Страница 2: ...electrical 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 sen...

Страница 3: ...bet 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...

Страница 4: ...pair 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 se...

Страница 5: ...atic Calibration 4 3 4 2 Manual Calibration 4 6 5 Keypad and 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 Performa...

Страница 6: ...9 5 9 5 The Alkaline Error 9 6 9 6 The Acid Error 9 7 9 7 Calibration Calculation 9 8 9 8 ORP Oxidation Reduction Potential 9 9 9 9 Reference Electrode 9 10 9 10 Wetted Part Materials of Sensors 9 12...

Страница 7: ...IM 12B03D02 01E 6 Contents...

Страница 8: ...and clock function 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 d...

Страница 9: ...on dependent Dimensions Approximately 150 H x 61 W x 42 D mm not including connector part Weight Approximately 220 g including batteries EMC Conformity Standards EMI Emission EN 61326 1 Class B Test I...

Страница 10: ...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 tw...

Страница 11: ...length 3 m With KCl refillable type combination pH sensor cable length 0 75 m KCl refillable type ORP sensor cable length 0 75 m Japanese English Always AA PH72 Sensors 00 11 13 21 23 32 33 41 43 51...

Страница 12: ...ns PERSONAL pH ORP METER 2004 PH72 S1 0 E000001 MODEL No STYLE Sensor cable connector Display Keypad O ring Connection to a dedicated pH ORP sensor pH mV and temperature simultaneously Hand strap atta...

Страница 13: ...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...

Страница 14: ...lution 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...

Страница 15: ...number Sensor stand Part no K9220XN Soft carrying case Part no B9269KJ pH 9 Standard solution Part no K9220XF Holds a sensor when pH ORP meter is used on the table Made of rustproof stainless steel U...

Страница 16: ...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 K9...

Страница 17: ...1E 1 10 1 Outline O rings and gaskets are important parts to ensure that the PH72 meter is water resistant Replace these parts as required Refer to Section 6 7 Storage and O ring Gasket Replacement fo...

Страница 18: ...mage 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...

Страница 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...

Страница 20: ...nnected 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 Se...

Страница 21: ...is ready for ORP measurement 2 5 Wetting Cap The glass electrode should be kept wet during storage If the glass electrode dries out it will take hours to rehydrate and in the meantime the meter may g...

Страница 22: ...ent from the actual temperature of the sample being measured the displayed measured value may not be true The bigger the difference between the temperature displayed on the meter and the actual temper...

Страница 23: ...IM 12B03D02 01E 2 6 2 Preparation...

Страница 24: ...solution containing hydrofluoric acid 4 Remove stains from the PH72 meter body using a soft cloth or tissue If necessary use a neutral detergent 5 If an abnormal symptom occurs during measurement loc...

Страница 25: ...ow 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 s...

Страница 26: ...anel Clock panel MEAS MEAS MEAS day month year Solution temperature pH value or mV hour minute 3 4 Saving a Measured Value There are two ways to save a measured value holding temporarily and storing a...

Страница 27: ...ill be displayed If is displayed before the data number has reached 300 run defrag referring to Section 5 3 15 Defrag memory DFLG panel This will free up memory occupied by deleted data allowing data...

Страница 28: ...to 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 Otherwi...

Страница 29: ...tandard 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 solut...

Страница 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...

Страница 31: ...ing 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 thoroughl...

Страница 32: ...te 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 so...

Страница 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 g...

Страница 34: ...nsor 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 co...

Страница 35: ...IM 12B03D02 01E 4 8 4 Calibration...

Страница 36: ...perature Storing data pH or mV 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 d...

Страница 37: ...alue 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...

Страница 38: ...ey 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 m...

Страница 39: ...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 conn...

Страница 40: ...able 5 1 Function Mode Item List Default 2 no dAtA 25 8C pH 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...

Страница 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...

Страница 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 D...

Страница 43: ...element The setting range is from 10 0 to 110 08C F050302 EPS to set to confirm F ENT F ENT 3 Set measurement unit PV U panel Used to set a pH unit for pH measurement or a mV unit for ORP measurement...

Страница 44: ...NT key to confirm each entry F050305 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 6 Time setting tIME panel Used to set t...

Страница 45: ...etting 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 seco...

Страница 46: ...ss 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 7 F050309 EPS F ENT to turn...

Страница 47: ...F050311 EPS to toggle to proceed F ENT to cancel F ENT to execute F ENT 12 Set temperature unit tP U panel Used to select the temperature unit Celsius 8C or Fahrenheit 8F Use keys to select the desire...

Страница 48: ...ted 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 lef...

Страница 49: ...IM 12B03D02 01E 5 14 5 Keypad and Display Functions...

Страница 50: ...EPS 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 solu...

Страница 51: ...tton 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...

Страница 52: ...itions 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...

Страница 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 wit...

Страница 54: ...an 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 stain...

Страница 55: ...O ring 3 Do not place any object on top of the sensor or on the top of the PH72 meter F0604 EPS Wetting cap Protective cover Attach wetting cap containing cotton wad moistened with a few drops of wat...

Страница 56: ...cal 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 i...

Страница 57: ...IM 12B03D02 01E 6 8 6 Maintenance...

Страница 58: ...re 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...

Страница 59: ...ult 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 e...

Страница 60: ...ses 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 conta...

Страница 61: ...tion 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 S...

Страница 62: ...C 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 Me...

Страница 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 el...

Страница 64: ...H ORP Meter is pH Press F ENT key and follow the procedure described in Section 5 3 3 Set measurement unit PV U panel to move to the display with mV unit F0801 EPS Figure 8 1 Example of Displayed ORP...

Страница 65: ...s in the same manner for pH sensors use a cotton swab or brush to clean See Section 6 2 If the potential is outside the tolerance after the sensor check has been performed according to the procedure i...

Страница 66: ...some powder may float on the surface of the solution This will not affect the ability of the solution A quinhydrone solution may change with time so it should be prepared and used within the same day...

Страница 67: ...3D02 01E 8 4 8 ORP Meter 400 300 200 100 0 0 10 20 30 40 50 Temperature 8C Oxidation reduction potential mV Quinhydrone solution Tolerance F0802 EPS Figure 8 2 Oxidation Reduction Potential of Check S...

Страница 68: ...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 co...

Страница 69: ...aday 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...

Страница 70: ...solution side Hydrated layers on glass Boundary layers i e S e H H F0902 EPS Figure 9 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 F0903 EPS Alkali...

Страница 71: ...69 08 70 07 71 07 72 06 73 05 74 04 T0901 EPS Table 9 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...

Страница 72: ...s different from the temperature compensation 9 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 s...

Страница 73: ...s 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...

Страница 74: ...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...

Страница 75: ...re 9 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 standar...

Страница 76: ...where oxidized and reduced forms of substances are present the electrode will acquire the potential that corresponds the ratio of activities of both forms of substances and reaches its equilibrium Th...

Страница 77: ...lution Liquid junction or salt bridge KCl m AgCl Ag The reaction formula is AgCl 1 e Ag 1 Cl If a represents the activity from equation 9 6 Activity of solid a51 then a 51 a 51 a5mg m molality g activ...

Страница 78: ...rode is SHE E oxidation reduction potential when reference electrode is Ag AgCl electrode filled with 3 3 mol l KCl solution E potential of Ag AgCl electrode filled with 3 3 mol l KCl solution vs SHE...

Страница 79: ...r grip cable connection Needle type pH sensor Glass sensor Test tube size pH sensor Glass sensor ORP sensor Polypropylene resin sensor body protective cover Platinum electrode Glass glass electrode te...

Страница 80: ...own 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...

Страница 81: ...IM 12B03D02 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 F ENT F ENT Set measurement unit...

Страница 82: ...e 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...

Страница 83: ...ction 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...

Страница 84: ...Auto calibration in progress Auto calibration is complete Standard solution temperature Prompting Manual calibration is complete Measurement status Measurement status Automatic calibration Manual cal...

Страница 85: ...IM 12B03D02 01E 6 Appendix...

Страница 86: ...ice 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 sol...

Страница 87: ...IM 12B03D02 01E MSDS 2 MSDS...

Страница 88: ...IM 12B03D02 01E MSDS 3 MSDS...

Страница 89: ...IM 12B03D02 01E MSDS 4 MSDS...

Страница 90: ...IM 12B03D02 01E MSDS 5 MSDS...

Страница 91: ...IM 12B03D02 01E MSDS 6 MSDS...

Страница 92: ...IM 12B03D02 01E MSDS 7 MSDS...

Страница 93: ...IM 12B03D02 01E MSDS 8 MSDS...

Страница 94: ...IM 12B03D02 01E MSDS 9 MSDS...

Страница 95: ...IM 12B03D02 01E MSDS 10 MSDS...

Страница 96: ...IM 12B03D02 01E MSDS 11 MSDS...

Страница 97: ...IM 12B03D02 01E MSDS 12 MSDS...

Страница 98: ...IM 12B03D02 01E MSDS 13 MSDS...

Страница 99: ...IM 12B03D02 01E MSDS 14 MSDS...

Страница 100: ...IM 12B03D02 01E MSDS 15 MSDS...

Страница 101: ...IM 12B03D02 01E MSDS 16 MSDS...

Страница 102: ...IM 12B03D02 01E MSDS 17 MSDS...

Страница 103: ...IM 12B03D02 01E MSDS 18 MSDS...

Страница 104: ...IM 12B03D02 01E MSDS 19 MSDS...

Страница 105: ...IM 12B03D02 01E MSDS 20 MSDS...

Страница 106: ...IM 12B03D02 01E MSDS 21 MSDS...

Страница 107: ...IM 12B03D02 01E MSDS 22 MSDS...

Страница 108: ...IM 12B03D02 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 5 3 1 5 4 6 1 7 6...

Страница 109: ...tromagnetic Conformity Standard Class B B B 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 s...

Страница 110: ...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 Complet...

Страница 111: ...th KCl refillable type ORP sensor cable length 3 m With KCl refillable type combination pH sensor cable length 0 75 m KCl refillable type ORP sensor cable length 0 75 m Japanese English Global except...

Страница 112: ...following options are available for the Model PH72 Personal pH ORP Meter for your convenience When ordering specify the part number pH 9 Standard solution Part no K9220XF Used for calibration when an...

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