Horiba Scientific LAQUAact D-71G Instruction Manual Download Page 37

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pH measurement

• Standard solution type

Note

The calibration value of the pH 7 standard solution differs between NIST and USA.

NIST: pH 6.865 (at 25°C)
USA: pH 7.000 (at 25°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 solution of the USA specification.

Standard solution icon

CUST

（

custom specification

）

Set to use the standard solution of an optional specification.

Standard solution icon

Summary of Contents for LAQUAact D-71G

Page 1: ...Instruction Manual pH Meter D 71G 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: ...herein 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 L...

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: ...2 Display 3 Operation key 5 Basic operation 6 Changing the operation mode 6 Entering numeric values 7 Measurement 9 Preparation 10 Confirmation before starting measurement 10 Turning ON the instrument...

Page 18: ...ment 39 Environmental conditions for storage 39 Maintenance and storage of the pH electrode 40 How to Resolve Errors or Troubles 41 When an error message appears 41 ERR No 0001 Memory error 41 ERR No...

Page 19: ...e is poor 48 Nothing appears when the power is turned ON 48 Swelling of operation key sheet 48 Part of the display is missing 49 Appendix 51 Main specifications 51 Instrument default settings 52 Techn...

Page 20: ...M E M O...

Page 21: ...h part and the main role function 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 Bas...

Page 22: ...6A0000 means the device manufactured 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...

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: ...of each part 4 Battery level display Battery level is high Battery level is a little lower Battery level is low Battery has run out Replace the batteries ERR No 0002 is displayed and operation is dis...

Page 25: ...e Start calibration in the calibration mode DATA key Changes from the measurement mode to the data mode SET key Changes from the measurement mode to the setting mode Starts repeatability inspection af...

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: ...Entering 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 u...

Page 28: ...M E M O...

Page 29: ...12 Pressing the POWER key 12 Setting the date and time 13 Connecting an electrode 14 pH measurement 15 Setting the instrument 15 Setting temperature compensation default ATC 15 Setting the standard so...

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 29 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 31 Deleting calibration data page 33 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: ...M E M O...

Page 47: ...Displaying the latest calibration and inspection data 31 Displaying the latest calibration data 31 Displaying the latest inspection data 32 Deleting calibration data 33 Setting the ID number default...

Page 48: ...ory in the 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...

Page 49: ...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 50: ...ing 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 saved...

Page 51: ...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 52: ...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 53: ...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 54: ...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 55: ...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 56: ...ng mode 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 tempe...

Page 57: ...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 58: ...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 59: ...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 60: ...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 61: ...ability error The electric 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 sensi...

Page 62: ...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 63: ...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 64: ...n 1000 items of data Cause How to solve problem Calibration has not been performed for the set number of days of the calibration interval or longer Perform calibration The calibration interval alarm i...

Page 65: ...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 66: ...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 67: ...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 68: ...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 69: ...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 70: ...M E M O...

Page 71: ...midity 0 C to 45 C 80 or less in 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 A...

Page 72: ...ommon Temperature setting Automatic ATC Manual 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 2...

Page 73: ...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 74: ...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 75: ...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 sa...

Page 76: ...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...

Page 77: ...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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