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This manual describes pH measurement and ORP measurement. For detailed
information, see "The Story of pH and Water quality" on our website.
This page presents the knowhow we have cultivated over many years, for example, how
temperature affects measured values and what to do when you want to measure various
samples.
By registering as a user, you can download sample software, refer to technical
documents and receive the newsletter each of which contains useful information on
water quality measurement.
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Summary of Contents for LAQUAact D-72G

Page 1: ...Instruction Manual pH ORP Meter D 72G Preface Part names and basic operation Measurement Various functions Maintenance How to resolve errors or troubles Appendix Portable pH Water Quality Meter...

Page 2: ......

Page 3: ...rein shall be extended Any malfunction or damage attributable to improper operation Any malfunction attributable to repair or modification by any person not authorized by HORIBA Advanced Techno Co Ltd...

Page 4: ...ries see below all exist If damage or defects are found on the product contact your dealer Note The accessories are not waterproof The supplied alkaline batteries are used to check operation thus it i...

Page 5: ...n this case it satisfies the requirements of the Directive 2006 66 EC for the object chemical This product should not be disposed of as unsorted household waste Your correct disposal of WEEE waste bat...

Page 6: ...o provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not...

Page 7: ...tal protection use period in years It does not indicate a product guarantee period It guarantees that the product will not cause environment pollution nor serious influence on human body and property...

Page 8: ...accordance with SJ T 11364 GB T 26572 Denotes that the amount of the hazardous substance contained in all of the homogeneous materials used in the component is below the limit on the acceptable amount...

Page 9: ...riellen Umgebung k nnen die elektromagnetischen St rungen eventuell zu Produktfehlfunktionen f hren Um dieses Produkt unter solchen Umst nden verwen den zu k nnen muss der Benutzer ggf angemessene Ma...

Page 10: ...sono soggetti a modifiche senza preavviso Ambiente di installazione Questo prodotto non stati progettati per essere utilizzati in ambienti industriali secondo la norma EN61326 1 In un ambiente indust...

Page 11: ...0 1 Categor a de sobretensi n II Nivel de contaminaci n 2 POL Informacje dotycz ce bezpiecze stwa Przed przyst pieniem do u ytkowania tego produktu nale y dok adnie zapozna si z niniejsz instrukcj aby...

Page 12: ...d Installatieomgeving Dit product is niet bedoeld voor gebruik in een industri le omgeving zoals gedefinieerd in EN 61326 1 In een industri le omgeving kan de elektromagnetische interferentie de werki...

Page 13: ...solution comes in contact with the skin wash it off immediately If it gets into the eyes flush with plenty of water and then consult a doctor Broken glass Broken glass may cause injury The outer tube...

Page 14: ...ing the batteries while connected to the AC adapter the instrument does not have the dust proof and waterproof performance The dust proof and waterproof performance is maintained only when the covers...

Page 15: ...ery Do not attempt to charge a non rechargeable battery Environmental conditions for use and storage Temperature 0 C to 45 C Humidity under 80 in relative humidity and free from condensation Avoid the...

Page 16: ...ecessary points for correct operation and notifies the important points for handling the product This indicates the part where to refer for information This indicates reference information Original la...

Page 17: ...ing date 2 Display 3 Operation key 5 Basic operation 6 Changing the operation mode 6 Changing the measurement parameter 7 Using the backlight 7 Entering numeric values 8 Measurement 9 Preparation 10 C...

Page 18: ...instrument from an external device 40 Using the automatic data save default OFF 41 Setting the ID number default 000 43 Using the calibration interval alarm default OFF 44 Calibrating temperature sen...

Page 19: ...error 56 ERR No 0010 Memory full 56 Troubleshooting 57 The indicated value fluctuates 57 The response is slow 58 The indicated value does not change No response 58 The measured value blinks 59 The te...

Page 20: ...Contents XVIII For more information 68 Options 69...

Page 21: ...tion and basic operation method of each part Names of each part 2 Instrument 2 Identification of manufacturing date 2 Display 3 Battery level display 4 Operation key 5 Basic operation 6 Changing the o...

Page 22: ...ured in 2016 January No Name Function 1 Display Displays the measured value and set value and so on 2 Operation keys Used for instrument operation 3 Electrode connector Connects the BNC connector of t...

Page 23: ...isplays the currently set measurement parameter 7 HOLD icon Lights when the measured value display is fixed 8 SET icon Lights when numerical values are entered 9 Temperature display area Displays the...

Page 24: ...tery level display Battery level is high Battery level is a little lower Battery level is low The backlight may become unavailable Battery has run out Replace the batteries ERR No 0002 is displayed an...

Page 25: ...nt mode to the data mode SET key Changes from the measurement mode to the setting mode Starts repeatability inspection after calibration is complete Changes from the setting mode to the measurement mo...

Page 26: ...data or setting mode is available only from the measurement mode When changing to a different mode first change to the measurement mode and then change to the desired mode Icon Name Function Measurem...

Page 27: ...nged by pressing the key Using the backlight When it is difficult to see the screen in a dark location you can turn on the backlight by pressing the key If the backlight is not operated for 5 minutes...

Page 28: ...tering numeric values When entering numeric values to make various settings and set a calibration value you can change the selected digit using the keys and increment or decrement the value 0 to 9 usi...

Page 29: ...measurement 15 Setting the instrument 15 Setting temperature compensation default ATC 15 Setting the standard solution used for calibration default NIST 16 Standard solution type 17 Performing calibra...

Page 30: ...d solution for the measurement parameter If not prepare the standard solution by yourself or purchase it Are there any items that should not be wet or stained around the instrument Depending on the op...

Page 31: ...n the battery cover on the back of the instrument clockwise to lock the battery cover Note Do not replace the batteries in a dusty place or with wet hands Dust or moisture could get inside the instrum...

Page 32: ...with force when the connector does not match the socket When not using the AC adapter close the AC adapter connector cover While connected to the AC adapter the instrument does not have the dust proof...

Page 33: ...nd time of saved data becomes incorrect Refer to Displaying saved data page 31 1 Press the key to enter the setting mode 2 Press the keys to select the MAINT maintenance setting and then press the key...

Page 34: ...reparing electrodes Use the following procedure to correctly connect the electrode to the instrument 1 Insert the electrode connector by fitting its groove with the connector socket pin of the instrum...

Page 35: ...atched to the standard solution temperature only when the standard solution setting is NIST and USA However the function does not convert the pH value according to the temperature characteristics of e...

Page 36: ...ration default NIST Set the standard solution used for calibration With this instrument you can choose from 3 types NIST USA and CUST the standard solution other than NIST and USA Set according to the...

Page 37: ...5 C Standard solution type Description NIST Japanese specification Set to use the standard solution of the Japanese specification Standard solution icon USA USA specification Set to use the standard s...

Page 38: ...a page 33 Deleting calibration data page 35 pH standard solution setting is NIST or USA This section describes the procedure for two point calibration of NIST pH 4 and 7 as a general calibration examp...

Page 39: ...rent measured value display appears 8 Check that the pH value is stable while the pH electrode is immersed in the standard solution then press the key Stabilization judgment starts and the HOLD icon b...

Page 40: ...ectrode status After calibration is complete the current pH electrode status is diagnosed from the calibration result Use this information for maintenance of the electrode Display Description Referenc...

Page 41: ...solution filler port of the pH electrode If calibration is performed with the port closed the internal solution does not flow and the measurement value is not stabilized Make sure to keep the port ope...

Page 42: ...issue paper 3 Open the internal solution filler port of the pH electrode If calibration is performed with the port closed the internal solution does not flow and the measurement value is not stabilize...

Page 43: ...e at least 3 cm from the tip of the pH electrode 7 Press the key and enter the standard solution value for the second point 8 While the pH electrode is immersed in the standard solution press the key...

Page 44: ...ctrode status is diagnosed from the calibration result Use this information for maintenance of the electrode Display Description Reference Both ERR No are not displayed Electrode sensitivity 93 to 100...

Page 45: ...ation 3 Immerse at least 3 cm from the tip of the pH electrode in the sample solution In order to flow the internal solution into the sample solution immerse the liquid junction in the sample solution...

Page 46: ...lt ATC Automatic temperature measurement function can be used by using combination electrode equipped with a temperature sensor or connecting a temperature compensation electrode When mV or ORP are me...

Page 47: ...easurement and the relative value measurement Absolute value measurement mode The measured value of electromotive force is displayed Relative value measurement mode The measured value of electromotive...

Page 48: ...unction in the sample solution surely 4 While the electrode is immersed in the sample solution press the key Stabilization judgment starts and the HOLD icon blinks When the value is stabilized the HOL...

Page 49: ...latest inspection data 34 Deleting calibration data 35 Printing measured values and calibration data 36 Transferring saved data to a PC 39 Operating the instrument from an external device 40 Using th...

Page 50: ...measurement mode except during the automatic hold measurement 1 While the data to save is displayed press the key to enter the data mode 2 Select IN data saving and press the key Saved data is displa...

Page 51: ...n the internal memory 1 Press the key to enter the data mode 2 Press the keys to select OUT display saved data and then press the key Press the keys to change the measurement data and press the keys t...

Page 52: ...setting mode 2 Press the keys to select the MAINT maintenance setting and then press the key 3 Press the keys to select the DATCLR delete saved data and then press the key 4 Select YES to delete the s...

Page 53: ...the latest calibration data 1 Press the key to enter the data mode 2 Press the keys to select CAL pH or ION display calibration data and then press the key The electrode status based on the calibratio...

Page 54: ...tion data and then press the key Displays the repeatability value the absolute value of the difference between the measured value and standard solution value Display Description Reference GOOD Electro...

Page 55: ...ntenance setting and then press the key 3 Press the keys to select the CALCLR delete calibration data and then press the key 4 Select YES to delete the calibration data or select NO to cancel deleting...

Page 56: ...w to display measurement data and calibration data refer to the respective section Displaying saved data page 31 Displaying the latest calibration and inspection data page 33 The format of the printou...

Page 57: ...on calibration result Printout format Description Inst model D 72 Instrument model Suffix G is not printed Inst SN KL1TSE09 Instrument serial number Elect status GOOD Electrode status based on calibr...

Page 58: ...2013 09 01 Calibration date Time 09 00 Calibration time pH 4 01 176 9 mV Measurement potential 25 0 C ATC Temperature value and temperature setting pH 6 86 7 6 mV Measurement potential 25 1 C ATC Tem...

Page 59: ...D 70 refer to the FD 70 instruction manual which you can download from our website as well The required PC specifications and recommended PC specifications for using the FD 70 are shown in the followi...

Page 60: ...urs and the online mode does not start up and as a result RS 232C communication cannot be performed Also when the transfer format is changed turn OFF the power of the instrument and PC and then reboot...

Page 61: ...tomatic data save function the data saved until just before the batteries run out Replace the batteries and check the data 1 Press the key to enter the setting mode 2 Press the keys to select the AT L...

Page 62: ...he key starts saving the data when the setting is ON Pressing the key again stops the data saving process During automatic data saving measurement data is displayed for one second each time a measurem...

Page 63: ...the data is saved in the internal memory the ID number entered in this setting is saved together with the data 1 Press the key to enter the setting mode 2 Press the keys to select the ID ID number set...

Page 64: ...th this function set an error is displayed immediately When the error is displayed performing calibration clears the error 1 Press the key to enter the setting mode 2 Press the keys to select the PERI...

Page 65: ...3 Press the keys to select the MAINT maintenance setting and then press the key 4 Press the keys to select the TEMP temperature calibration setting and then press the key 5 Enter the set temperature a...

Page 66: ...external device 1 Press the key to enter the setting mode 2 Press the keys to select the MAINT maintenance setting and then press the key 3 Press the keys to select the AT OFF automatic power off set...

Page 67: ...r test printing As a result of test printing if the printout is as shown below the printer unit is operating correctly 1 Press the key to enter the setting mode 2 Press the keys to select the MAINT ma...

Page 68: ...erature calibration data is also initialized 1 Press the key to enter the setting mode 2 Press the keys to select the MAINT maintenance setting and then press the key 3 Press the keys to select the IN...

Page 69: ...ohol The instrument is made of solvent resistant materials but that does not mean it is resistant to all chemicals Do not dip the instrument in strong acid or alkali solution or wipe it with such solu...

Page 70: ...slow Store in a moist atmosphere Follow the steps below to properly store the electrode 1 Wash the electrode well with pure water or deionized water to remove sample completely and close the internal...

Page 71: ...e water or deionized water Daily storage of the electrode If the electrode becomes dry the response will slow Store in a moist atmosphere Follow the steps below to properly store the electrode 1 Wash...

Page 72: ...ectrode internal solution If the surface of the metal electrode is dirty wipe it gently with a soft material such as absorbent cotton moistened with alcohol or a neutral cleaning solution or immerse i...

Page 73: ...potential does not stabilize within three minutes 0004 Asymmetric potential error The asymmetric potential of the electrode is out of the range of 45 mV 0005 Electrode sensitivity error The electrode...

Page 74: ...ue without using the automatic hold function The electrode is dirty Clean the electrode The electrode is cracked Replace the electrode The responsive glass membrane of the electrode has been dry for a...

Page 75: ...e electrode must be immersed up to the liquid junction As a guide immerse to at least 3 cm from the tip of the electrode There is a problem with the standard solution Use new standard solution Cause H...

Page 76: ...performed for the set number of days of the calibration interval or longer Perform calibration The calibration interval alarm is ON and calibration has not been performed Perform calibration Cause How...

Page 77: ...ion of the reference electrode until it is higher than the level of the sample Cause How to solve problem There is a motor or other device causing electrical interference Measure at a place where no i...

Page 78: ...ortant to select an electrode that is appropriate for the sample Consult your dealer To confirm an electrode that is appropriate for the sample check the pH electrode selection guide in our catalogue...

Page 79: ...ough to cover liquid junction The electrode must be immersed up to the liquid junction As a guide immerse to at least 3 cm from the tip of the electrode The electrode cable is broken Replace the elect...

Page 80: ...nish the internal solution of the reference electrode until it is higher than the level of the sample Cause How to solve problem Power is not supplied Insert batteries or connect the AC adapter option...

Page 81: ...t to full screen display Follow the steps below to check the display 1 Press the key to enter the setting mode 2 Press the keys to select the MAINT maintenance setting and then press the key 3 Press t...

Page 82: ...M E M O...

Page 83: ...relative humidity no condensation Power AAA alkaline batteries LR03 or AAA Ni MH rechargeable batteries 2 AC adapter 100 V to 240 V 50 60 Hz 0 37 A option Dimensions Approx 67 80 28 42 170 mm The fig...

Page 84: ...anual MTC Automatic ATC Temperature input value 0 0 C to 100 0 C 25 0 C Auto power off ON OFF OFF Auto power off time 1 min to 30 min 30 min Sample ID 000 to 2999 000 Auto data memory ON OFF OFF Auto...

Page 85: ...of electromotive force The liquid inside the glass electrode usually has a pH 7 If one measures the electromotive force generated at the electrode membrane the pH of the sample can be found by calcul...

Page 86: ...2 Saturated calcium hydroxide solution 0 1 666 4 003 6 984 9 464 13 423 5 1 668 3 999 6 951 9 395 13 207 10 1 670 3 998 6 923 9 332 13 003 15 1 672 3 999 6 900 9 276 12 810 20 1 675 4 002 6 881 9 225...

Page 87: ...solution can only be determined by equation What is important here is that ORP is determined by the ratio of activity between the oxidant Fe3 and the reductant Fe2 using the equation aFe2 aFe3 In act...

Page 88: ...e presents the knowhow we have cultivated over many years for example how temperature affects measured values and what to do when you want to measure various samples By registering as a user you can d...

Page 89: ...Part name Part number Remarks AC adapter 3200647413 With 6 plug adapters Plain paper printer Printer USA 120 V 3014030146 Printer cable sold separately Printer EU 230 V 3014030147 Printer cable 301403...

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Page 91: ...t jp For any questions regarding this product please contact your local agency or inquire from the following website http global horiba com contact_e index htm 31 Miyanonishi cho Kisshoin Minami ku Ky...

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