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Main specifications

D-74

●

Table of conductivity cell range

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Unit: S/m

・

Unit: S/cm

Range

Cell constant

1000 m

-1

100 m

-1

10 m

-1

20.0 to 199.9 S/m
2.00 to 19.99 S/m

0.200 to 1.999 S/m

20.0 to 199.9 mS/m

2.00 (0.00) to 19.99 mS/m

0.200 (0.000) to 1.999 mS/m

0.0 to 199.9 µS/m

Range

Cell constant

10 cm

-1

1 cm

-1

0.1 cm

-1

0.200 to 1.999 S/cm

20.0 to 199.9 mS/cm
2.00 to 19.99 mS/cm

0.200 to 1.999 mS/cm

20.0 (0.0) to 199.9 µS/cm

2.00 (0.00) to 19.99 µS/cm

0.000 to 1.999 µS/cm

Содержание LAQUAact D-74

Страница 1: ...Portable pH ORP Conductivity Meter D 74 Instruction Manual CODE GZ0000333608...

Страница 2: ......

Страница 3: ...improper 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 13: ...ay 3 Operation key 5 Basic operation 6 Changing the operation mode 6 Switching the displays 7 Changing the measurement parameter 8 Using the backlight 9 Entering numeric values 10 Measurement 11 Prepa...

Страница 14: ...ation data 47 Printing measured values and calibration data 49 Transferring saved data to a PC 54 Operating the instrument from an external device 55 Using the automatic data save default OFF 56 Setti...

Страница 15: ...um calibration points exceeded 75 ERR No 0007 Cannot identify standard solution 75 ERR No 0008 Calibration interval error 76 ERR No 0009 Printer error 76 ERR No 0010 Memory full 76 ERR No 0011 Cell co...

Страница 16: ...conductivity cell range resistivity range 86 Instrument default settings 87 Technical note 88 pH measurement glass electrode 88 pH standard solutions at various temperatures 89 ORP measurement 90 Cond...

Страница 17: ...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 Switching the...

Страница 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...

Страница 19: ...isplay area Displays the currently set measurement parameter This is displayed in the main screen and the sub screen respectively 7 Main screen channel icon Displays the channel of the main screen 8 H...

Страница 20: ...display area Displays the unit for the measurement parameter and the display item This is displayed in the main screen and the sub screen respectively No Name Function Battery level is high Battery le...

Страница 21: ...t mode to the data mode SET key Changes from the measurement mode to the setting mode Starts repeatability inspection after calibration is complete POWER key Turns ON OFF the power of instrument MODE...

Страница 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...

Страница 23: ...en the main screen and the sub screen In the measurement mode pressing the keys can switch the channels between the main screen and the sub screen When performing calibration or setting switch the dis...

Страница 24: ...parameters For measurement an electrode corresponding to the measurement parameter is required In the measurement mode the measurement parameter can be changed by pressing the key This operation is av...

Страница 25: ...backlight by pressing the key If the backlight is not operated for 5 minutes it automatically turns off To turn it off manually press the key again while the backlight is on Note Turning on the backl...

Страница 26: ...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...

Страница 27: ...on type 19 Performing calibration 20 pH standard solution setting is NIST or USA 20 Inspecting repeatability 23 pH standard solution setting is CUST 24 Performing measurement 27 mV ORP measurement 28...

Страница 28: ...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...

Страница 29: ...tery cover turn the knob on the battery cover on the back of the instrument clockwise Note Do not replace the batteries in a dusty place or with wet hands Dust or moisture could get inside the instrum...

Страница 30: ...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...

Страница 31: ...e and time of saved data becomes incorrect Refer to Displaying saved data page 43 1 Press the key to enter the setting mode 2 Press the keys to select the MAINT maintenance setting and then press the...

Страница 32: ...e electrode for the sample you want to measure Use the following procedure to correctly connect the electrode to the instrument 1 Insert the electrode connector by fitting its groove with the connecto...

Страница 33: ...calibration using the value 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 tem...

Страница 34: ...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...

Страница 35: ...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...

Страница 36: ...data page 45 Deleting calibration data page 47 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...

Страница 37: ...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...

Страница 38: ...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...

Страница 39: ...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...

Страница 40: ...d wipe it with filter paper or 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 me...

Страница 41: ...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...

Страница 42: ...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...

Страница 43: ...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...

Страница 44: ...ting the temperature display default ATC Automatic temperature measurement function can be used by using combination electrode equipped with a temperature sensor or connecting a temperature compensati...

Страница 45: ...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...

Страница 46: ...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...

Страница 47: ...eter page 8 Conductivity can be measured using channel 2 of the instrument Press the keys to set the main screen to channel 2 The basic steps are the same for all measurement parameters however some s...

Страница 48: ...re of the sample and displays the result on the instrument If automatic temperature measurement function is not used or the temperature connector is not connected to the instrument the temperature set...

Страница 49: ...IX fixed at mS cm Select the unit depending on your application When measuring resistivity these units correspond to m cm cm for mS cm FIX 1 Press the key to enter the setting mode 2 Press the keys to...

Страница 50: ...an select the salinity unit from PPT or Select the unit depending on your application 1 Press the key to enter the setting mode 2 Press the keys to select the UNIT SAL salinity unit setting and then p...

Страница 51: ...e cell constant of the conductivity cell and then press the key 4 Press the keys to enter the number of the cell constant of the conductivity cell and then press the key Note The unit used for the cel...

Страница 52: ...erature correctly 1 Press the key to enter the setting mode 2 Press the keys to select the TC temperature conversion setting and then press the key 3 Select ON to use this function or select OFF not t...

Страница 53: ...be used for calibration The current measured value is displayed on the sub screen 3 Wash the conductivity cell with pure water or deionized water and wipe it with filter paper or tissue paper Do not t...

Страница 54: ...Conductivity measurement 38 HORIBA Tip You can cancel calibration by pressing the key while the HOLD icon is blinking...

Страница 55: ...he sample solution press the key Stabilization judgment starts and the HOLD icon blinks When the value is stabilized the HOLD icon changes from the blinking state to the lit state and the display is f...

Страница 56: ...M E M O 40 HORIBA...

Страница 57: ...he latest inspection data 46 Deleting calibration data 47 Printing measured values and calibration data 49 Transferring saved data to a PC 54 Operating the instrument from an external device 55 Using...

Страница 58: ...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 di...

Страница 59: ...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...

Страница 60: ...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...

Страница 61: ...playing the latest calibration data 1 Press the key to enter the data mode 2 Press the keys to select CAL display calibration data and then press the key The electrode status based on the calibration...

Страница 62: ...ection data and then press the key The repeatability value the absolute value of the difference between the measured value and standard solution value is displayed Display Description Reference GOOD E...

Страница 63: ...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 CALCLR delete calibration data and then press...

Страница 64: ...S to delete the calibration data or select NO to cancel deleting it And then press the key When YES is selected END appears after deletes calibration data Press the key To return to the setting mode p...

Страница 65: ...during displaying the data you want to save Use the printer cable Options page 93 to connect the printer unit with the instrument beforehand If the automatic data memory is set to ON you cannot print...

Страница 66: ...rument serial number Elect status OK Electrode status based on calibration result Offset 0 7 mV Asymmetry potential of calibration data Sensitivity Sensitivity of calibration data pH 4 01 6 86 98 9 Da...

Страница 67: ...temperature setting Sample 0000 Sample ID number Inst model D 74 Instrument model Inst SN KL1TSN20 Instrument serial number Elect status OK Electrode status based on calibration result Memory Num 0001...

Страница 68: ...erature value and temperature setting pH 6 86 7 6 mV Measurement potential 25 1 C ATC Temperature value and temperature setting Inspection before use pH 6 85 7 8 mV Measurement potential at time of re...

Страница 69: ...tability 0 01 Repeatability of calibration data pH 6 85 7 8 mV Measurement potential at time of repeatability inspection 25 1 C ATC Temperature value and temperature setting Printout format Descriptio...

Страница 70: ...he 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 fol...

Страница 71: ...ccurs 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 rebo...

Страница 72: ...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 LOG automatic data...

Страница 73: ...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 measur...

Страница 74: ...data 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 selec...

Страница 75: ...ion 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 k...

Страница 76: ...ode 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 temperatu...

Страница 77: ...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...

Страница 78: ...e 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 MAIN...

Страница 79: ...emperature 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...

Страница 80: ...M E M O 64 HORIBA...

Страница 81: ...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...

Страница 82: ...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...

Страница 83: ...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...

Страница 84: ...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...

Страница 85: ...ell is stored in a dry state the cell constant will change Store with the black electrode part immersed in pure water or deionized water or with the protective cap filled with pure water or deionized...

Страница 86: ...cell with pure water or deionized water and wipe it with filter paper or tissue paper Do not touch the black electrode part 4 Immerse the conductivity cell in the prepared standard solution and read t...

Страница 87: ...conductivity cell in the standard solution Immerse it the standard solution up to the hole in the lower part of the cell 8 While the conductivity cell is immersed in the standard solution then press t...

Страница 88: ...M E M O 72 HORIBA...

Страница 89: ...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 sensitivity is either 105 or more or 85 o...

Страница 90: ...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...

Страница 91: ...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 Caus...

Страница 92: ...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 to solve problem There is a...

Страница 93: ...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...

Страница 94: ...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...

Страница 95: ...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...

Страница 96: ...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...

Страница 97: ...e 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 Use...

Страница 98: ...M E M O 82 HORIBA...

Страница 99: ...ation 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 figures in parentheses are maxim...

Страница 100: ...cale Salinity Measuring principle Conversion from conductivity value Measuring range Display range 0 00 to 4 00 Resolution 0 01 TDS Measuring principle Conversion from conductivity value Measuring ran...

Страница 101: ...to 199 9 S m 2 00 to 19 99 S m 0 200 to 1 999 S m 20 0 to 199 9 mS m 2 00 0 00 to 19 99 mS m 0 200 0 000 to 1 999 mS m 0 0 to 199 9 S m Range Cell constant 10 cm 1 1 cm 1 0 1 cm 1 0 200 to 1 999 S cm...

Страница 102: ...1 1000 m 1 0 200 to 1 999 M m 20 0 to 199 9 k m 2 00 to 19 99 k m 0 200 to 1 999 k m 20 0 0 0 to 199 9 m 2 00 0 00 to 19 99 m 0 000 to 1 999 m Range Cell constant 10 cm 1 1 cm 1 0 1 cm 1 20 0 to 199 9...

Страница 103: ...power off time 1 min to 30 min 30 min Sample ID 000 to 2999 000 Auto data memory ON OFF OFF Auto data memory time 2 seconds to 24 hours 2 seconds pH Standard solution NIST USA CUST NIST Calibration in...

Страница 104: ...9 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 ca...

Страница 105: ...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 9 225...

Страница 106: ...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...

Страница 107: ...roportional to the distance l between the two pole plates These relationships are expressed by equation below R Resistance r Resistivity m a Pole plate area m2 l Distance between pole plates m J Cell...

Страница 108: ...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...

Страница 109: ...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...

Страница 110: ...M E M O 94 HORIBA...

Страница 111: ...2 Miyanohigashi Kisshoin Minami ku Kyoto 601 8510 Japan http www horiba com...

Страница 112: ......

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