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horiba D-72, Instruction Manual

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D-72

9

Measurement

This section describes the basic method of measurement of each measurement
parameters.

■

 Preparation ................................................................................. 10

●

 Confirmation before starting measurement ..................................... 10

●

 Turning ON the instrument................................................................. 11

•  Inserting the batteries .......................................................................................... 11
•  Using the AC adapter (option)............................................................................. 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 solution used for calibration (default: NIST) ....................... 16
•  Standard solution type......................................................................................... 17

●

 Performing calibration ........................................................................ 18

•  pH standard solution setting is NIST or USA....................................................... 18
•  Inspecting repeatability........................................................................................ 21
•  pH standard solution setting is CUST.................................................................. 22

●

 Performing measurement................................................................... 25

■

 mV, ORP measurement ............................................................. 26

●

 Setting the instrument ........................................................................ 26

•  Setting the temperature display (default: ATC) ................................................... 26

●

 Switching between absolute value and relative value..................... 27

●

 Performing measurement................................................................... 28

Summary of Contents for D-72

Page 1: ...Portable pH ORP Meter D 72 Instruction Manual CODE GZ0000333604...

Page 2: ......

Page 3: ...er operation Any malfunction attributable to repair or modification by any person not authorized by HORIBA Ltd Any malfunction or damage attributable to the use in an environment not specified in this...

Page 4: ...ee 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 is poss...

Page 5: ...ulators under the Directive 2006 66 EC in the European Union The symbol might be put with one of the chemical symbols below In this case it satisfies the requirements of the Directive 2006 66 EC for t...

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: ...d to the most extreme situations This indicates a potentially hazardous situation which if not avoided could result in death or serious injury This indicates a potentially hazardous situation which if...

Page 8: ...Do not disassemble or modify the instrument Otherwise it may heat up or be ignited resulting in a fire or an accident CAUTION Harmful chemicals The internal solution of pH electrode is highly concentr...

Page 9: ...nto the eyes do not rub the eyes rinse with clean water immediately and then consult a doctor Contact with alkaline fluid could cause blindness Do not put batteries in a fire expose to heat disassembl...

Page 10: ...waterproof performance is maintained only when the covers are attached correctly After replacing the batteries connecting the AC adapter and using the RS 232C communication make sure that the waterpr...

Page 11: ...ot 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 followi...

Page 12: ...on in this manual This interprets the necessary points for correct operation and notifies the important points for handling the product This indicates the part where to refer for information This indi...

Page 13: ...splay 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 Confirmation b...

Page 14: ...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 sensor 45 Changing the automati...

Page 15: ...ting 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 temperature display blinks or is fixed at 25 C 59...

Page 16: ......

Page 17: ...and the main role function and basic operation method of each part Names of each part 2 Instrument 2 Display 3 Battery level display 4 Operation key 5 Basic operation 6 Changing the operation mode 6 C...

Page 18: ...r Connects the BNC connector of the electrode 4 Temperature connector Connects the temperature connector of the electrode 5 Battery cover Set batteries inside 6 Electrode hook attachment section Attac...

Page 19: ...a Displays 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 t...

Page 20: ...Battery 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 displaye...

Page 21: ...on 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 after calibration is complete POWER ke...

Page 22: ...tion 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 Meas...

Page 23: ...hanged 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 minute...

Page 24: ...A 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...

Page 25: ...14 pH 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 c...

Page 26: ...ndard 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 th...

Page 27: ...on 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 instr...

Page 28: ...le 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 pr...

Page 29: ...e and 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...

Page 30: ...n preparing 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 inst...

Page 31: ...e matched 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 o...

Page 32: ...alibration 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...

Page 33: ...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...

Page 34: ...data 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 ex...

Page 35: ...urrent 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...

Page 36: ...electrode 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 Refer...

Page 37: ...al 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...

Page 38: ...r tissue 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 stabil...

Page 39: ...rse 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 ke...

Page 40: ...electrode 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...

Page 41: ...ibration 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 solut...

Page 42: ...fault 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...

Page 43: ...he relative value measurement Absolute value measurement mode The measured value of electromotive force is displayed Relative value measurement mode The measured value of electromotive force of a samp...

Page 44: ...d junction 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...

Page 45: ...he 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...

Page 46: ...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 is dis...

Page 47: ...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 to...

Page 48: ...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 DATCLR delete saved data and then press the key 4 Select YES to delete t...

Page 49: ...ng 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 calibra...

Page 50: ...spection 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 Ele...

Page 51: ...aintenance 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 deleti...

Page 52: ...or details of how 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 forma...

Page 53: ...ed on calibration result Printout format Description Inst model D 72 Instrument model Inst SN KL1TSE09 Instrument serial number Elect status OK Electrode status based on calibration result Offset 0 7...

Page 54: ...te 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 T...

Page 55: ...e FD 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 foll...

Page 56: ...occurs 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 reb...

Page 57: ...automatic 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...

Page 58: ...g the 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 measu...

Page 59: ...ata to be saved When 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...

Page 60: ...tion data is deleted with 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...

Page 61: ...de 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 temperatur...

Page 62: ...g an 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...

Page 63: ...for 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...

Page 64: ...temperature 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 th...

Page 65: ...irt wipe it gently with a cloth moistened with alcohol 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...

Page 66: ...ill 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 inter...

Page 67: ...ure 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 Was...

Page 68: ...e electrode 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 immer...

Page 69: ...c 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 electrod...

Page 70: ...value 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 fo...

Page 71: ...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 There is a problem with the standard solution Use new standard solution Cause...

Page 72: ...een 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...

Page 73: ...lution 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 n...

Page 74: ...important 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 catalog...

Page 75: ...enough 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 ele...

Page 76: ...plenish 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 opt...

Page 77: ...set 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 Pres...

Page 78: ...M E M O 62 HORIBA...

Page 79: ...aline 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 figures in parentheses are maximum thicknesses Mass...

Page 80: ...TC 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 2999 000 Auto data memory ON OFF OFF A...

Page 81: ...mV 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 cal...

Page 82: ...pH 12 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...

Page 83: ...the 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...

Page 84: ...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 c...

Page 85: ...ample you want to measure For details refer to the catalogue or our website or contact your dealer Part name Part number Remarks AC adapter Cable UL 120 V 3014031951 AC adapter Cable EU 230 V 30140319...

Page 86: ...M E M O 70 HORIBA...

Page 87: ...2 Miyanohigashi Kisshoin Minami ku Kyoto 601 8510 Japan http www horiba com...

Page 88: ......

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