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2 Taking Measurements

2.6 Measuring ORP

38

HORIBA

●

Measuring relative mV

This meter can measure relative potential difference by
shifting the measured potential to zero. (A potential
without compensation is called absolute mV.)

1.

Press the CAL key in the mV Instantaneous
Value Measurement mode.

REL is displayed under mV and the current reading
value becomes the offset potential used for
compensation, and the meter will display the
relative mV instantaneous value.

2.

Press the CAL key again.

The meter returns to the absolute mV display.

Potential compensation during

relative

mV

measurement does not affect the displayed pH value.

For how to check the status of the ORP electrode, refer
to “

ORP standard solution” page 183.

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Summary of Contents for D-25

Page 1: ...For more information please contact us ExpotechUSA 10700 Rockley Road Houston Texas 77099 USA 281 496 0900 voice 281 496 0400 fax E mail sales expotechusa com Website www ExpotechUSA com ...

Page 2: ......

Page 3: ...differential between the water and the device of 5 or less Warranty and Responsibility Your meter is covered by warranty for a period of one 1 year under normal use Although unlikely if any trouble attributable to us should occur during this period necessary exchange or repairs shall be conducted by us free of charge The warranty does not cover the following Any trouble or damage attributable to a...

Page 4: ...ent categories Ⅱ Ⅲ and Ⅳ FCC Warning This equipment has been tested and found to comply withthe limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to 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 inst...

Page 5: ...to cause fire or accidents Do not disassemble or modify the meter Heat or fire may occur to cause fire or accidents CAUTION Do not use the serial communication or AC adapter in the place that may possibly contact with moisture It may cause fire electric shock or breakage Part of the electrode is made of glass handle with care not to break it WARNING This indicates an potentially hazardous situatio...

Page 6: ...jury CAUTION This indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury It may also be used to alert unsafe practices This mark indicates the operation requires a special care and attention This mark indicates to which the reader should go for reference This mark indicates reference information HINT ...

Page 7: ...lding the connector part Do not pull the cable part it may cause a breakage Do not remove the battery gasket or twist it When opening the battery case make sure that no foreign matter is attached to the battery gasket Do not use any unspecified batteries it may cause a breakage Location of use and storage The place which room temperature is at 0 to 45 The place which relative humidity is under 80 ...

Page 8: ...rement modes 22 2 4 Selecting the measurement modes 24 2 5 Measuring pH 25 2 6 Measuring ORP 35 2 7 Ion measurement D 53 39 2 8 Conductivity measurement D 54 49 2 9 Dissolved oxygen DO measurement D 55 55 3 Functions 65 3 1 Data memory function 65 3 2 pH calibration history display 68 3 3 Displaying and setting the clock 72 3 4 Setting modes 74 3 4 1 Entering the Setting mode 74 3 4 2 Display and ...

Page 9: ...ng format 132 5 4 1 When the ENTER key is pressed in the Measurement mode 132 5 4 2 When the manual data memory storage is performed in the Measurement mode 134 5 4 3 When the ENTER key is pressed in the Data Memory Call screen 134 5 4 4 When calibration or check is performed in the Calibration mode 135 5 4 5 When the ENTER key is pressed in the calibration history display 137 5 4 6 Test printing ...

Page 10: ...86 7 4 Conductivity measurement 190 7 5 Dissolved oxygen measurement 197 7 6 Specifications 200 7 7 Default settings 202 7 8 Operation flowcharts 203 7 9 Pin layout of special cables 207 7 9 1 RS 232C communications cable 207 7 9 2 Cable for CITIZEN printer 207 7 9 3 Cable for SEIKO printer 207 7 10 Spare and optional parts 208 7 10 1 Spare parts list 208 7 10 2 Options 215 ...

Page 11: ...CONTENTS VIII HORIBA ...

Page 12: ...ter This chapter explains the part names how to connect the electrodes how to replace the batteries and precautions when using the meter 1 1 Package contents The following items are shipped with each HORIBA pH meter package Meter main unit 1 unit Dry cell batteries 2 pcs Strap 1 pc ...

Page 13: ...1 1 Package contents 2 HORIBA Soft case 1 pc Protective cap 1 pc D 53 54 55 Operation manual 1 book To take measurements you will need electrode s Refer to 7 10 Spare and optional parts page 208 when purchasing the electrode s ...

Page 14: ...D 52 D 53 D 54 D 55 pH pH electrode pH standard solution ORP mV ORP electrode ION ION electrode Ion standard solution Conductivity Conductivity electrode Conductivity standard solution Dissolved oxygen DO electrode Temperature Function Explanation Model Page No D 52 D 53 D 54 D 55 Data memory Enables a maximum of 300 items to be stored page 65 pH repeatability check Displays the difference between...

Page 15: ...et potential sensitivity page 70 Clock The date and time are displayed page 73 Auto Power OFF Turns ON OFF setting that automatically turns power OFF if no keys are touched for 30 minutes page 94 RS 232C communications Enables communication with a computer using RS 232C page 99 Printer output Prints the contents of the memory printer sold separately page 129 Commercial power supply Enables the use...

Page 16: ... Enables temperature compensation to be conducted in pH Measurement mode either manually or using a temperature sensor page 80 Auto data memory Stores data automatically at an interval of 2 sec to 24 hours page 81 pH calibration frequency setting Sets the next calibration time according to the number of measurements made after calibration page 83 Sample ID ID No of the sample page 84 Ion unit Togg...

Page 17: ...nd S cm page 86 COND temperature coefficient Automatically or manually sets a temperature coefficient for a sample page 87 DO salinity compensation Compensates for salinity of sample page 88 DO atmospheric pressure compensation Compensates for atmospheric pressure at mea surement site page 89 Function Explanation Model Page No D 52 D 53 D 54 D 55 ...

Page 18: ... Adjusts the display of the temperature sensor to the actual temperature page 93 Auto Power OFF Sets the function that automatically turns the power OFF if no keys are touched 30 minutes page 94 pH ION CH setting D 53 only Changes pH ION measurement channel page 95 Remaining data memory Displays the remaining memory page 96 Data memory clear Deletes data in memory page 96 Initializing settings Ini...

Page 19: ... names The D 52 53 54 55 pH meters have the following parts The D 52 has CH1 only Display Keys AC connector Dry cell battery holder Serial communication port Electrode connector CH1 Temperature connector CH2 Temperature connector CH1 Electrode connector CH2 ...

Page 20: ...ing modes Measurement data hour and minute HOLD Setting modes differ according to model Electrode status Part name Display Contents Input channel Input channel 1 Input channel 2 Measurement item Displayed when measuring mV Displayed when measuring pH Displayed when measuring dissolved oxygen Displayed when measuring conductivity Displayed when measuring ions Displayed in mV Measurement mode when r...

Page 21: ...ted at pH standard solution Displayed when US standard is selected at pH standard solution Displayed when custom standard is selected at pH standard solution Displayed during data memory function for 3 sec Displayed while data in memory is being called up and when manual data memory is being called up or blinks when automatic data memory is being called up Displayed when a printer is connected Som...

Page 22: ...l Blinking Cleaning is needed Constant display Replacement time is approaching Calibration history Calibration history display Displayed after calibration for pH and ION electrodes as calibration history When no calibration data is available Displayed when no calibration has been performed for pH and ION electrodes Meter mode Displayed when in Measurement mode Displayed when in Calibration mode Pa...

Page 23: ...Description MEAS key Returns to the Measurement mode Starts measurement MODE key Selects measurement item SET key Selects setting item CAL key Enters the Calibration mode Starts calibration UP key Executes the data memory function Increases numerical value ENTER key Establishes the setting DOWN key Calls up data memory Decreases numerical value CAL DATA key Calls up calibration data ON OFF key Tur...

Page 24: ...ith uncleaned hands Hold the metal portion when turning the electrode conenctor The following connectors are used depending on electrode type Connect the pH ORP electrode to CH1 Connect the ion conductivity DO electrode to CH2 CH1 Electrode connector pH ORP electrode Temperature connector Temperature electrode for CH1 CH2 Electrode connector ION electrode D 53 Conductivity electrode D 54 DO electr...

Page 25: ... push the electrode with undue force when the pins are not properly aligned 2 Push the electrode connector into the connector port while turning it clockwise following the grooves see photo and 3 Push the connector cover over the connector see photo being careful to push it straight on without turning it The meter will be waterproof only if this cover is placed properly over the connector pH ORP e...

Page 26: ...ure connector into the jack on the main unit until the O ring on the electrode cannot be seen at all see photo The meter will not be waterproof if the electrode is not inserted properly When the temperature electrode is not connected or is connected improperly the automatic temperature compensation ATC will be 25 C ...

Page 27: ...clock data remove and replace the batteries while the meter is connected to the AC adapter sold separately Replace the batteries only after turning the power OFF Any saved data will not be lost When opening and closing the battery cover be care ful that no water gets inside the meter Check that the rubber packing is not twisted and no foreign matter is stuck to it Otherwise the meter may no longer...

Page 28: ...the battery cover into the grooves on the meter and then tighten the stop screw Check that the rubber packing is twisted and no foreign matter is stuck to it Otherwise the meter may no longer be waterproof Battery life The table below shows the battery life of alkaline batteries during continuous use The life of manganese batteries is about a half of the alkaline batteries Model Battery life D 52 ...

Page 29: ...ion AC adapter specifications When the AC adapter is connected the meter is no longer waterproof Be careful not to let water get into the meter Supply voltage range 100 200 V AC Frequency range 50 60 Hz Current rating Max 370 mA Class2 Power supply Equipment pro tected by double insulation Indoor use only Supply voltage fluc tuations allowed up to 10 AC adapter connector ...

Page 30: ...tive cap D 53 54 55 D 52 53 54 55 19 1 9 Using the protective cap D 53 54 55 For meters having two electrode connector channels be sure to use the protective cap when using only one channel in order to protect the unused connector Protective cap ...

Page 31: ...1 Overview of the Meter 1 9 Using the protective cap D 53 54 55 20 HORIBA ...

Page 32: ... OFF key turns the power on off The ON OFF key functions when it is pressed continuously for about one second to protect against accidental operation 2 2 Settings required before measurement The built in clock allows you to record the date of calibration and data memory storage When using the meter for the first time be sure to set this clock 3 3 Displaying and setting the clock page 72 ...

Page 33: ...e solution being measured Instantaneous Value Measurement mode The D 50 Series of pH meters perform instantaneous value measurement as the default measurement mode when the power is first turned ON and when the auto hold measurement is cancelled or cleared For this reason the screen displayed when the meter is in the Instantaneous Value Measurement mode is called the initial screen in this manual ...

Page 34: ...y When the measured value becomes stable HOLD will stop blinking and remain displayed and the measured value will remain displayed To clear the hold status or stabilized value when HOLD is blinking press the MEAS key Criteria for judging stability Blinks Displayed pH ORP ION measurement Within 1 mV variance in potential after 10 seconds Conductivity measurement Within 3 digit variance after 10 sec...

Page 35: ... display Pressing the MODE key once more returns the display to the first measurement mode Power ON Ion Measurement CH2 mode instantaneous value COND Measurement CH2 mode instantaneous value DO Measurement CH2 mode instantaneous value D 55 D 54 D 53 pH Measurement CH1 mode instantaneous value mV Measurement CH1 mode instantaneous value Clock display mV Measurement CH2 mode instantaneous value D 53...

Page 36: ... 3 Standard solution calibration Preparation for standard solution 3 4 3 pH standard solution setting page 77 3 4 4 Temperature compensation setting page 80 3 4 5 Auto data storage setting page 81 3 4 7 Sample ID setting page 84 4 Auto Hold Calibration 3 4 6 pH calibration frequency setting page 83 pH repeatability check page 32 pH calibration history page 68 5 pH Measurement mode screen instantan...

Page 37: ...itial screen will appear Chemical solution The liquid inside the electrode is highly concentrated potassium chloride 3 33 mol L KCl If the internal solution in the electrode comes in contact with your hands or skin wash immediately with water If the internal solution comes in contact with your eyes flush immediately with large amounts of water and seek treatment by a physician Glass fragments Glas...

Page 38: ...r is displayed Standard solutions for calibration are defaulted to pH 2 pH 4 pH 7 pH 9 and pH 12 3 4 3 pH standard solution setting page 77 This section will explain how to conduct a two point calibration using pH 7 and pH 4 standard solutions Calibration procedure 1 Press the CAL key while in the pH Measurement mode The meter enters the Calibration mode and CAL is displayed The mode cannot be cha...

Page 39: ... with filter paper or tissue paper 3 Open the internal solution filler port Leave the port open while calibration is taking place Calibration at first point 1 Immerse the tip of the electrode in a beaker containing pH 7 standard solution Immerse the pH electrode in the sample at least three centimeters Open Close 3 cm or more ...

Page 40: ...lizes HOLD will stop blinking and the calibrated value will be displayed The bottle mark will be displayed indicating that calibration was conducted with pH7 standard solution To stop the calibration Press the CAL key while the HOLD mark is blinking To establish the calibration Press the ENTER key while the HOLD mark is blinking To redo the calibration Press the CAL key after the HOLD mark is disp...

Page 41: ...value stabilizes HOLD will stop blinking and the calibrated value will be displayed The bottle mark will be displayed indicating that calibration was conducted with pH 4 standard solution 4 Press the MEAS key to return to the pH Measurement screen While calibrations are being performed in the Calibration mode redoing a calibration only updates the calibration data for the pertinent standard soluti...

Page 42: ...RR Not displayed The electrode is in good condition Electrode sensitivity is from 93 to 100 Blinking Electrode sensitivity has dropped to the level of 90 to 93 Make sure that you are using the right standard solution Clean the electrode Washing the electrodes page 142 Displayed Electrode sensitivity has dropped to the level of 85 to 90 ERR No 05 Electrode sensitivity error pH page 160 ERR No 04 As...

Page 43: ... calibration 1 After calibration and while still in the Calibration mode immerse the electrode in pH 7 standard solution and press the ENTER key The difference between the calibrated value and measured value is displayed There is no problem in measurement accuracy if the difference is within 0 05 pH Clearing calibrated values To clear all the calibrated values 1 Set the pH meter to the Calibration...

Page 44: ...h pure de ionized water and then wipe with filter paper or tissue paper 2 Open the internal solution filler port Leave the port open while measurement is taking place 3 Immerse the electrode all the way in the sample Immerse the pH electrode in the sample at least three centimeters Open Close 3 cm or more ...

Page 45: ...will stop blinking and will be displayed The indicated value will remain displayed continually Refer to the Criteria for judging stability page 23 for the criteria for judging the stability of the readout When measurement data is held using Instantaneous Value Measurement or Auto Hold Measurement you can store that data in the memory by pressing the key See 3 1 Data memory function page 65 ...

Page 46: ... with the pH electrode shows the potential of the electrode This measurement is useful for checking samples and the performance of the electrode Refer to the electrode instruction manual and make sure you have the correct electrode Power ON 1 Electrode preparation pH Measurement mode instantaneous value 2 mV Measurement mode instantaneous value 3 Relative mV Measurement mode Setting the clock page...

Page 47: ...nce The ORP Instantaneous Value Measurement screen will appear 3 Press the MEAS key with the initial screeen displayed HOLD will blink on the display until the reading stabilizes When the value stabilizes HOLD will stop blinking and will be displayed continually The indicated value will remain displayed and ORP measurement is completed Refer to the Criteria for judging stability page 23 for the cr...

Page 48: ...2 Taking Measurements 2 6 Measuring ORP D 52 53 54 55 37 If the data is to be saved to the memory press the key See 3 1 Data memory function page 65 ...

Page 49: ...aneous Value Measurement mode REL is displayed under mV and the current reading value becomes the offset potential used for compensation and the meter will display the relative mV instantaneous value 2 Press the CAL key again The meter returns to the absolute mV display Potential compensation during relative mV measurement does not affect the displayed pH value For how to check the status of the O...

Page 50: ...ment mode Setting the clock page 73 3 4 8 Ion unit setting D 53 page 85 3 4 9 Ion slope setting D 53 page 86 Clear Hold Power ON 1 Electrode preparation 3 Standard solution calibration 4 Auto Hold calibration Ion calibration history display D 53 page 70 5 ION Measurement instantaneous value 3 4 5 Auto data storage setting page 81 3 4 7 Sample ID setting page 84 6 ION ISE Auto Hold Measurement 3 1 ...

Page 51: ...ment mode to enter the ION Measurement mode The ION Instantaneous Value Measurement screen will appear Chemical solution Toxic substances may be used in some ION electrodes Use caution when handling them If the internal solution in the electrode comes in contact with your hands or skin wash immediately with water If the internal solution comes in contact with your eyes flush immediately with large...

Page 52: ...o 3 4 9 Ion slope setting D 53 page 86 Units Units are set at g L as the default setting To change the units to mol L refer to 3 4 8 Ion unit setting D 53 page 85 Calibration at first point 1 Press the CAL key while in the ION Instantaneous Value Measurement mode to select the Calibration mode 2 Wash the electrode well with pure de ionized water and then wipe with filter paper or tissue paper Do n...

Page 53: ...d while they are at as close to the same temperature as possible 4 Set the standard solution value by using the or key to move the value up or down The decimal point can be moved by using the ENTER key 5 Press the CAL key to start calibration The measured value will be displayed and HOLD will blink until the reading stabilizes When the measured value stabilizes HOLD will stop blinking and the cali...

Page 54: ...oints The number of calibration points is displayed in the lower left of the display as shown below 1 When all calibration operations have been completed press the MEAS key to return to the ION Measurement screen Do not return any used standard solution to the original container Discard it While calibration is being performed in the calibration mode redoing calibration for a standard solution upda...

Page 55: ...2 Taking Measurements 2 7 Ion measurement D 53 44 HORIBA To clear calibrated values refer to Clearing calibrated values page 32 ...

Page 56: ...rd solution at a constant speed 300 500 rpm using a magnetic stirrer Measure the standard solution and the sample that is to be measured while they are at close to the same temperature as possible 3 Press the MEAS key with the initial screeen displayed HOLD will blink on the display until the reading stabilizes When the value stabilizes HOLD will stop blinking and will be displayed continually The...

Page 57: ...curate measurement however certain techniques are required Refer to the electrode instruction manual or the procedures explained below for more information Adding ionic strength conditioner to sample One source of measurement error is the influence of ionic strength Adjusting the ionic strength by adding chemicals to the sample and standard solution for the corresponding ION electrodes will result...

Page 58: ...ample should be performed using a temperature bath and while stirring the solutions Effects of interfering ions on sample If the sample cannot be measured properly even after taking the preventative measures described in items 1 through 3 the solution may contain interfering ions ION electrode Additives per liter pH range Potassium K 5 9 g L sodium chloride NaCl pH 5 11 Ideal is near neutral Calci...

Page 59: ...ance limits Potassium K Li Ma Mg2 Ca2 Sr2 Ba2 1 000 NH4 70 Cs 3 Rb 0 4 at 10 4 mol L K Calcium Ca2 Na K Ba2 NH4 Mg2 1 000 Mn2 500 Co2 350 Ni4 Cu2 70 Sr2 50 Fe2 Zn2 1 Fe3 0 1 at 10 4 mol L Ca2 Chloride Cl NO3 F HCO3 SO4 2 PO4 2 1000 SCN 0 3 MnO4 0 1 Br 0 03 S2O3 2 S2 I Ag Hg2 not possible at 10 3 mol L Cl Fluoride F OH 10 within measurable range Nitrate NO3 SO4 2 1000 CH3COO 300 F 200 Cl 40 NO2 3 I...

Page 60: ... Measurement mode instantaneous value Power ON 1 Electrode preparation Setting the clock page 73 3 4 10 Conductivity unit setting D 54 page 86 3 4 11 Temperature coefficient setting D 54 page 87 3 Cell constant setting 4 Calibration mode About once a year Preparation for standard solution 5 Conductivity Measurement instantaneous value Auto Hold calibration Clear Hold 3 4 5 Auto data storage settin...

Page 61: ...ect electrode Entering the Conductivity Measurement mode 1 Remove the electrode protective cap from the electrode 2 Immerse the electrode in pure de ionized water 3 Select the Conductivity Measurement mode when the pH Instantaneous Value Measurement screen is displayed by pressing the MODE key The Conductivity Instantaneous Value Measurement screen will appear ...

Page 62: ...the cell constant written on the electrode label Setting range 0 700 1 300 To change the coefficient use the following procedure When the SI unit system m 1 is set When the former unit system cm 1 is set Temperature coefficient The default value of the temperature coefficient is set at 2 00 ºC To change this setting refer to 3 4 11 Temperature coefficient setting D 54 page 87 Unit Setting The defa...

Page 63: ...prepare a standard solution of potassium chloride refer to Preparing potassium chloride standard solution page 190 1 Immerse the electrode in the standard solution of potassium chloride 2 Enter the Calibration mode by pressing the MODE key in the CELL SET mode 3 Enter the value of the standard solution used for calibration in the Calibration mode using the and keys Conductivity and temperature coe...

Page 64: ...ressing the CAL key HOLD is displayed and the calibration is completed To redo the calibration press the CAL key once more 5 Press the MEAS key to enter the Measurement mode If any calibration error occurs take it as a indication that the electrode has gone bad Replace the old electrode with a new one ...

Page 65: ...asured value will be displayed and HOLD will blink until the reading stabilizes When the measured value stabilizes HOLD will stop blinking and the measured value will remain displayed and measurement will be completed Refer to the Criteria for judging stability page 23 for the criteria for judging the stability of a readout When the meter is in the Instantaneous Value Measurement mode or the measu...

Page 66: ...value Power ON 1 Electrode preparation Setting the clock page 73 3 4 10 Conductivity unit setting D 54 page 86 3 4 11 Temperature coefficient setting D 54 page 87 3 Calibration mode Atmospheric pressure Auto Hold calibration 4 Dissolved Oxygen Measurement mode instantaneous value Auto Hold calibration Clear Hold 3 4 5 Auto data storage setting page 81 3 4 7 Sample ID setting page 84 5 Auto Hold Me...

Page 67: ...lectrode Entering DO Measurement mode 1 Press the MODE key while the measurement screen is displayed The DO Instantaneous Value Measurement screen will appear Chemical solution Highly concentrated potassium hydroxide KOH is used in the internal solution of the electrode If the internal solution in the electrode comes in contact with your hands or skin wash immediately with water If the internal so...

Page 68: ...ion If a higher level of precision is required refer to Calibrating with standard solution page 61 For greater measurement precision it is necessary to correct for air pressure Air pressure correction Air pressure is set to 1013 hPa as the default To change this setting refer to 3 4 13 DO atmospheric pressure compensation setting D 55 page 89 1 Remove any liquids from the membrane at the tip of th...

Page 69: ... When the measured value stabilizes HOLD will stop blinking and the End will be displayed The mode cannot be changed while measurement is taking place in Auto Hold while HOLD is blinking on the display While HOLD is blinking To cancel calibration Clear the hold by pressing the CAL key again To fix the calibration value Fix the value using the ENTER key 4 Press the MEAS key to return to the DO MEAS...

Page 70: ...e after calibration The effects of body temperature will cause the reading to take more time to stabilize To set the calibration value to the initial default settings press the CAL key while holding down the SET key in the CALIBRATION mode When calibration is being performed in the calibration mode redoing calibration for a standard solution updates the calibrated values for the standard solution ...

Page 71: ...temperature bath With field use electrodes measure at a constant flow speed about 30 cm in 2 seconds 2 Press the MEAS key while the Instantaneous Measurement screen is displayed The measured value will be displayed and HOLD will blink until the reading stabilizes When the measured value stabilizes HOLD will stop blinking and the calibrated value will be displayed Refer to Criteria for judging stab...

Page 72: ...ro standard solution and span calibration solution is arbitrary The meter automatically determines the standard solution Preparing zero standard solution Put 50 g sodium sulfate into 1000 ml of de ionized water and mix it until it dissolves completely Preparing span standard solution Put de ionized water into a container and create an oxygen saturated state by bubbling the water with an air pump C...

Page 73: ...ture bath With field use electrodes measure at a constant flow speed about 30 cm in 2 seconds 4 Press the CAL key HOLD will blink until the reading stabilizes While HOLD is blinking To cancel calibration Clear the hold by pressing the CAL key again To fix the calibration value Fix the value using the ENTER key After the readout value stabilizes the HOLD is displayed to indicate that the calibratio...

Page 74: ...teps 3 and 4 6 To return to the MEASUREMENT mode press the MEAS key When calibration is being performed in the calibration mode redoing calibration for a standard solution updates the calibrated values for the standard solution only If calibration is redone after returning to the measurement mode however the calibration will be performed in the initial state of the pH meter resulting in clearing a...

Page 75: ...2 Taking Measurements 2 9 Dissolved oxygen DO measurement D 55 64 HORIBA ...

Page 76: ...ent modes you can store data when the instantaneous value is measured or the measured value is held HOLD status during the Auto HOLD measurement by pressing the key The measurement reading is stored along with the temperature data HOLD value instantaneous value ATC MTC calibration point only for pH and ION measurement and sample ID at the time the measure ment was taken After the data number is di...

Page 77: ... ID setting page 84 Calling up memory data 1 Press the key in the Measurement mode to load measurement data Select and load the desired memory data item using the and keys The displayed number returns to 0 after 300 the maximum number Auto HOLD measurement None Instantaneous value Measurement mode Sample temperature Displayed Manual data memory Blinking auto data memory Measurement item Data memor...

Page 78: ...ired data item using the and keys 3 Press the MODE key to display the ID Select the desired data item using the and keys If an error occurs while a data number is being displayed the error number will NOT be displayed When using a printer sold separately press the ENTER key while in the DATA OUT mode to print the data ...

Page 79: ...fer to pH repeatability check on page 32 pH calibration history 1 Press the CAL DATA key in the pH Measure ment mode 2 Pressing the CAL DATA key toggles between the latest calibration date and the latest check date The latest check date is not displayed if no repeatability check has been performed Latest calibration date Latest check date Date and time of calibration ...

Page 80: ...ay Status display When the meter is in a good condition When the electrode needs washing When the electrode is old and is going bad Refer to Asymmetrical potential display on page 175 pH latest check data 1 Press the key with latest check date displayed The repeatability display will appear Asymmetrical potential display Sensitivity display 4 7 Example of 3 point calibration Status Sensitivity dis...

Page 81: ...n date will be displayed 2 Using the key toggle between the latest cali bration date display and the ION offset potential display and sensitivity display s latest calibration date ION offset potential display sensitivity display 1 sensitivity display 2 in the case of 3 point calibration Latest calibration date Sensitivity display 1 Ion offset potential display Sensitiv ity dis play 2 ...

Page 82: ...calibration date display by pressing the key in the reverse order Criteria for ION offset potential and sensitivity Ion offset potential is the referential potential used to determine whether the calibration was conducted successfully or the usable life of the electrode has been exceeded The following table shows the normal range of the ION offset potential and sensitivity If any such values are o...

Page 83: ... the clock 72 HORIBA 3 3 Displaying and setting the clock The clock needs to be when the meter is used for the first time or after replacing the batteries Displaying the clock Press the MODE key in the Measurement mode to dis play the clock ...

Page 84: ...y to year month day hour minute and second using the ENTER key You can set a numerical value using the and keys Set the seconds to 00 sec Pressing the ENTER key sets it to 00 3 After setting the clock press the ENTER key to update the setting Pressing the CAL key at this time returns you to the Clock Display screen without changing the current setting 4 Press the MODE key to return to the Measurem...

Page 85: ...etting Mode Selection cursor appears at the left bottom of the screen to indicate that the Setting mode is active 2 Pressing the SET key moves the Setting Mode Selection cursor one by one to allow you to select the Setting mode of your choice Selectable Setting modes are different depending on the meter model Display Setting Mode Selection cursor Setting mode items Setting Mode Selection cursor ...

Page 86: ...standard solution for pH calibration page 77 Temperature Compensation Selects the Auto Manual mode for temperature compensation page 80 Data Memory Selects the Auto Manual mode for data memory function page 81 Calibration Frequency Setting Sets the number of days between pH electrode calibrations page 83 ID Sets a number for a measured sample and stores its data page 84 Maintenance Sets various ma...

Page 87: ... the unit for conductivity measurement page 86 COND TC Sets the temperature coefficient for the sample to be measured in the Conductivity Measurement mode page 87 DO Salt Sets the salinity compensation value for DO measurement page 88 DO hpa Sets the atmospheric pressure compensation for DO measurement page 89 Display Name Description Model Page No D 52 D 53 D 54 D 55 ...

Page 88: ...pH standard solution on Types of pH standard solutions page 176 The calibrated value for pH 7 standard solution is different between the NIST standards and US standards NIST standard pH 6 86 at 25 C US standard pH 7 00 at 25 C NIST standard When using the standard solution required by NIST standards Bottle mark US standard USA When using the standard solution required by US standards Bottle mark C...

Page 89: ...ard solution setting 1 Press the SET key in the Measurement mode and select the pH Buffer Setting mode 2 Press the ENTER key to toggle between NIST standard US standard USA and a user defined standard CUST 3 Press the MEAS key to return to the Measurement mode ...

Page 90: ...standard solution used for calibration using the and keys While the setting is being made CuSt will blink 3 Press the CAL key to start the calibration The measured value will be displayed and HOLD will blink until the reading stabilizes When the measured value stabilizes HOLD will stop blinking and the calibrated value will be displayed Perform the calibration for the second and third point follow...

Page 91: ...ensation when using a temperature sensor of the electrode ATC is displayed When a temperature sensor is connected the current temperature is automatically displayed When no temperature sensor is connected the display shows 25 C MTC Manual temperature compensation when an electrode temperature sensor is not being used and the temperature of the solution is known before hand MTC is displayed Set the...

Page 92: ...ncel the Auto Power OFF function 2 Press the SET key in the Measurement mode to enter the Data Storage Setting mode 3 Pressing the ENTER key toggles auto data storage function ON and OFF Memory interval setting 1 Press the MODE key to toggle between hour minute and second 2 Specify a numerical value using the and keys Setting range 24 hours to 2 seconds ...

Page 93: ...the key Automatic data storage will commence The first data is recorded when the preset time has reached the preset starting time Do not turn the power ON OFF during automatic data storage The reliability of stored data may be compromised depending on when the ON OFF key was pressed 3 Press the CAL key Automatic data storage will end ...

Page 94: ...ayed 3 4 6 pH calibration frequency setting If you set a number of days in the calibration frequency setting ERR 8 calibration frequency error will be dis played after the specified days have passed since the last calibration 1 Press the SET key in the Measurement mode to select the Calibration Interval Setting mode 2 Pressing the ENTER key toggles the calibration frequency setting between ON and ...

Page 95: ...ple ID records its sample ID number as well as the measured data at time the data is stored 1 Press the SET key in the Measurement mode to enter the ID Setting mode 2 Use the ENTER key to select the digit 3 Specify a numerical value using the and keys Setting range 00000 to 99999 ...

Page 96: ...ress the SET key in the Measurement mode and select the ION Unit Setting mode 2 Pressing the ENTER key toggles between g L and mol L for the unit setting It is not possible to set different units for CH1 and CH2 Once the unit is changed the previous calibration data will be lost ...

Page 97: ...y a numerical value using the and keys Setting range 2 1 1 2 Once the ION slope is changed the previous calibration data will be lost Different ION slopes cannot be set for CH1 and CH2 3 4 10 Conductivity unit setting D 54 1 Press the SET key in the Measurement mode and select the COND Unit Setting mode 2 Use the ENTER key to toggle between S m and S cm units ...

Page 98: ...nt setting D 54 1 Press the SET key in the Measurement mode and select the COND TC Setting mode 2 Pressing the ENTER key toggles the temperature conversion ON and OFF 3 Specify a numerical value for the temperature coefficient using the and keys Setting range 0 00 to 10 00 per ...

Page 99: ...Press the SET key in the Measurement mode and select the DO Salt Setting mode 2 Pressing the ENTER key toggles between seawater salinity SEA and a user defined value 3 Specify a numerical value using the and keys Setting range 0 0 to 40 0 ppt The predefined seawater salinity SEA is 35 ppt ...

Page 100: ...the SET key in the Measurement mode and select the DO hpa Setting mode 2 Specify a numerical value using the and keys Setting range 100 to 1999 hPa 3 4 14 Maintenance mode Press the SET key in the Measurement mode and select the Maintenance mode The LCD CHECK screen Item No 00 will appear Item No Maintenance mode ...

Page 101: ...nown temperature page 93 03 Automatic power off setting Turns Automatic Power off function ON OFF and sets time period after which the power will be turned off when no keys are touched page 94 04 pH ION CH setting Enables CH 1 and CH 2 to be used and both channels to be set for pH measurement ION measurement page 95 05 Remaining data memoriy Displays number of data items that can still be stored p...

Page 102: ... the Maintenance mode to show item No 00 2 Press the ENTER key Compare the LCD screen with this diagram to confirm that all segments of the LCD are displayed 3 Use the MODE key to proceed to the Battery voltage check item No 01 HINT Entering the Maintenance mode Item No 00 Item No selection Maintenance mode Measure ment mode ...

Page 103: ...et at approximately 2 2 V The measured voltage for batteries depends on the current The voltage shown in this mode will be a little lower than the actual voltage 1 Use the MODE key to proceed to temperature zero adjustment item No 02 HINT Entering the Maintenance mode Item No 01 Battery Item No selection Maintenance mode Measure ment mode ...

Page 104: ... CH2 2 Immerse the electrode in a liquid with a known temperature and set the temperature using the and keys Setting range 0 0 to 100 0 C The temperature sensor attached to the electrode maintains an accuracy of 1 C even without calibration The above mode should be used when a greater precision than 1 C is required 3 Use the MODE key to proceed to Automatic power off setting item No 03 HINT Enteri...

Page 105: ... ON the power to the meter automatically turns off if the keys are not operated for the set amount of time 1 Press the ENTER key to toggle between ON and OFF When set to ON set the time for the power to be turned OFF using the and keys Setting range 1 to 30 minutes 2 Use the MODE key to proceed to pH ION CH setting item No 04 HINT Entering the Maintenance mode Item No 03 Item No selection Maintena...

Page 106: ...d to measure the pH and ions 1 Press the ENTER key to toggle between CH1 and CH2 2 Use the or keys to select the pH ION measurement channel 3 Press the MODE key to proceed to Remaining data memory item No 05 HINT Entering the Maintenance mode Item No 04 Item No selection Maintenance mode Measure ment mode ...

Page 107: ...NT Entering the Maintenance mode Data memory clear Item No 06 1 Pressing the ENTER key clears all the data stored in the memory 2 Press the MODE key to proceed to Initialization of setting item No 07 HINT Entering the Maintenance mode Item No 05 Number of remaining data memory items Item No selection Maintenance mode Measure ment mode Item No 06 Item No selection Maintenance mode Measure ment mode...

Page 108: ...urn the pH meter to the original set tings when the meter was purchased 1 Press the ENTER key to initialized the settings 2 Use the MODE key to proceed to Printer con nection and printing test item No 08 The setting values to be initialized are shown on page 202 HINT Entering the Maintenance mode Item No 07 Item No selection Maintenance mode Measure ment mode ...

Page 109: ...st When conditions are normal End is displayed When conditions are not normal Err is displayed 2 Press the MODE key to return to the first item in the maintenance modes LCD check Test print format HINT Entering the Maintenance mode When the printer is connected and power is ON Item No 08 When the printer is not connected or power is OFF Item No selection Maintenance mode Measure ment mode ...

Page 110: ...ransfer format is used by the meter Baud rate 2400 bps Character length 8 bits Parity None Stop bits 1 If the data transfer formats differ communications errors may occur or the on line mode may not start up and RS 232C communications cannot proceed normally If the transfer format is changed turn the power to both the pH meter and the computer OFF and then ON again When creating a program for RS 2...

Page 111: ...he program structure to have the data request repeated after a short waiting time This will provide more reliable communications If RS 232C communications is not used cover the RS 232C port with a rubber cap This system does not carry out control using DCD CTS or DSR Note this point when creating a program ...

Page 112: ...r message is returned in the OFF LINE mode The meter returns a response to any operation made in the following format OK CR LF If the pH meter does not accept the operation it returns an error message in the following format ER n CR LF n 0 Communication error 1 When a non existent command is input 2 When a timing command is input to which the meter cannot respond 3 When the numerical value in the ...

Page 113: ...ion MV page 105 Ion Measurement mode designation IO page 106 Conductivity Measurement mode designation CO page 106 DO Measurement mode designation DO page 107 Start measurement MS page 107 Start pH standard solution calibration CP page 108 Start ion calibration CI page 109 Start conductivity cell constant calibration CD page 110 Start DO calibration CA page 111 Clear calibration CC page 111 Data c...

Page 114: ... Request for Command Page No Header Command code All pH calibration history R PC page 114 D 53 Ion calibration history IC page 116 All Clock data OT page 118 Measurements MD page 119 Number of stored data items MC page 121 Memory data MS page 122 Model inquiry A RS page 125 Software version inquiry AV page 125 ...

Page 115: ... LOCK is displayed pH Measurement mode designation command format This command is always valid when on line The meter changes the status to pH Instantaneous display for the selected channel number This command is valid only when the settings for CHECK mode item no 05 pH ION CH setting match If the settings do not match this response will occur ER 2 CR LF operational error Channel No 2 is only avai...

Page 116: ...nt mode designation command format This command is always valid when on line The meter changes the status to mV Instantaneous display for the selected channel number Channel No 2 is only available on the D 53 model Channel number 1 or 2 Command code mV Measurement mode designation Header ...

Page 117: ...ngs do not match this response will occur ER 2 CR LF operational error When this command is sent with the exception of the D 53 model the reply is ER 2 operational error Conductivity Measurement mode designation command format D 54 This command is always valid when on line The meter changes the status to Conductivity Instantaneous Value display When this command is sent with the exception of model...

Page 118: ...splay If this command is sent to D 53 or 54 produces ER 2 operational error Start measurement command format When the meter status is Instantaneous Measurement Auto Hold Measurement will start If the command is issued during a measurement hold or during calibration the meter will return to the initial screeen status Command code Dissolved Oxygen Measurement mode designation Header Channel number 1...

Page 119: ...olution calibration command format This command is valid when on line during pH measurement or when HOLD is displayed This command is valid only when the meter is set for NIST or US calibration Issuing this command starts the pH standard solution calibration Channel number 1 or 2 Command code Measurement halt Header Channel number 1 or 2 Command code pH standard solution calibration start Header C...

Page 120: ...n the Measurement mode the previous calibration values will be cleared Setting ranges for calibration values When the units are mg L µmol L mmol L or µmol L 0 00 9 99 SP SP X or SP X X are also possible 10 0 99 9 SP XX is also possible SP 100 SP 999 Prefix for the unit of the calibration value to be set 0 1 m 2 μ The set unit determines which unit is used either mol L or g L Header Command code Io...

Page 121: ...cell constant Setting ranges for calibration values When units are μS m 0 0 999 9 only one place to the right of the decimal When units are mS m or S m 0 0000 199 9 After calibration is completed the cell constant coefficient will appear on the screen and be stored in the memory Prefix for the unit of the calibration value to be set 0 1 m 2 μ The set unit determines which unit is used either S m o...

Page 122: ...nd format This command is valid when on line when HOLD is being displayed for ION or pH calibration When a pH electrode is being calibrated the pH standard calibration value is cleared When an ION electrode is being calibrated the ION standard calibration is cleared The calibration value of the channel being displayed currently will be cleared Header Calibration method to be set one digit 0 Air ca...

Page 123: ...ear command format This command clears the data stored in the memory Data IN specification command format Valid only when manual data memory is set Power Off command format Command code Data clear Header Header Command code Data IN specification Command code Power Off Header ...

Page 124: ...ta Format of responses from meter When no operation can be received ER n CR LF n 0 Communications error 1 Command code does not exist 2 Unacceptable timing entered 3 Data exceeds range When operation has been received A When data is requested the result of the request is sent out according to each format B When an operation command has been issued OK is sent back Format OK CR LF ...

Page 125: ...alue including decimal point and sign Slope sensitivity potential 5 digits including decimal point and sign Potential is output for 1 point and 2 point cali bration data Year 4 digit A D Month 2 digit 01 12 Day 2 digit 01 30 Hours 2 digit 00 23 Minutes 2 digit 00 59 Seconds 2 digit 00 59 Calibration solution value 6 digit value including decimal point and sign Temperature 5 digit value including d...

Page 126: ... output as the calibration date time The slope is valid only for calibration with 2 or more points and the slope value for the third point will be a space If the check before use has been performed this data will be sent after calibration data is transmitted Slope data Slope data is output as the calibration coefficient A between each point multiplied by 100 When results exceed 999 9 or are negati...

Page 127: ...TC Calibration result 0 good 1 check 2 error Calibration points 1 digit 0 3 Channel number 1 digit 1 CH1 2 CH2 Header First calibration data Second calibration data Third calibration data Slope sensitivity potential 5 digits including decimal point and sign Potential is output for 1 point and 2 point calibration data Year 4 digit A D Month 2 digit 01 12 Month 2 digit 01 12 Minutes 2 digit 00 59 Ho...

Page 128: ...communications 4 4 Data request commands and responses D 52 53 54 55 117 Slope data When results exceed 999 9 or are negative the output is SP SP SP SP SP The year month day are output for each calibration point ...

Page 129: ... 118 HORIBA Clock data request command and response Request command format pH meter response format Command code Header Seconds 2 digit 0 59 Minutes 2 digit 0 59 Hours 2 digit 0 23 Day 2 digit 01 31 Month 2 digit 01 12 Header Year 4 digit A D lead zero is suppressed ...

Page 130: ...ber 1 digit 1 1CH 2 2CH Measurement or calibration 1 digit 0 Measurement 1 Calibration Measurement status 1 digit 0 Instantaneous value 1 Hold 2 Potential hunt in progress Ion slope 1 digit For ION measurement 0 2 1 1 2 1 3 2 Year 4 digit A D lead zero is suppressed Month 2 digit 01 12 Day 2 digit 01 31 Hours 2 digit 0 23 Minutes 2 digit 0 59 Seconds 2 digit 0 59 Measurement value 6 digit In the c...

Page 131: ...rature setting 1 digit 0 ATC 1 MTC Unit 1 digit Ion 0 mol L 1 g L Conductivity 0 S cm 1 S m pH 0 None DO 0 mg L mV 0 mV Supplementary unit 1 digit 0 none 1 μ 2 m 3 k 4 M Error code Error No display 2 digit One error No which takes precedence over others is output When the measurement calibration type is 0 The latest data is output regardless of occurrence of measurement errors 1 SP is output when ...

Page 132: ...tions 4 4 Data request commands and responses D 52 53 54 55 121 Request command for number of stored data items and its response Request command format Meter response format Header Command data Header Number of data items ...

Page 133: ...4 RS 232C communications 4 4 Data request commands and responses 122 HORIBA Request command for memory data and its response Request command format Header Memory No Command code ...

Page 134: ...it 0 59 Hours 2 digit 0 23 Day 2 digit 01 31 Month 2 digit 01 12 Year 4 digit A D lead zero is suppressed Ion slope 1 digit For ION measurement 0 2 1 1 2 1 3 2 For pH mV DO conductivity SP Measurement status 1 digit 0 Instantaneous value 1 Hold 2 Potential hunt in progress Measurement calibration type 1 digit 0 Measurement Channel number 1 digit 0 1CH 1 2CH 0 Manual data IN 1 Auto data IN Memory N...

Page 135: ...output regardless of occurrence of measurement errors 1 SP is output when any calibration error is produced Potential 5 digit Lead zero is suppressed Temperature 5 digit including decimal point 10 0 to 100 0 Right aligned with blank digits filled with spaces Temperature setting 1 digit 0 ATC 1 MTC Unit 1 digit Ion 0 mol L 1 g L Conductivity 0 S cm 1 S m pH 0 none DO 0 mg L mV 0 mV Supplementary un...

Page 136: ... for model and its response Request command format Meter response format Request command for software version and its response Request command format Meter response format Header Command code Lot No 7 digit Model 2 D 52 3 D 53 4 D 54 5 D 55 Header Header Command code Header Software version 12 digit ...

Page 137: ...inal Start Programs Accessories Communications HyperTerminal The HyperTerminal program Hypertrm exe is activated 2 Make the setting for name connection and port Select the COM port of the PC currently being used for the port setting 3 Set the COM port of the PC and set the transmission parameters as follows Baud rate 2400 bps Character length 8 bits Parity none Stop bit 1 bit 4 Make the settings i...

Page 138: ...nsmitted via HyperTerminal by enabling the Echo typed characters locally E option 5 Command input If a command is input the corresponding response data is sent back Command input should be completed within 10 seconds Be sure to first set the meter to the On line mode using the On line Off line command Windows is a registered trademark of Microsoft Corporation ...

Page 139: ...4 RS 232C communications 4 5 Communication example using the HyperTerminal 128 HORIBA ...

Page 140: ... Seiko DPU H245AS A03A Heat sensitive paper Attach the printer cable to the printer output connector Connect your printer only after turning OFF the power to the main unit of the meter For the layout of the connector terminals for the printer output cable refer to 7 9 Pin layout of special cables page 207 When a printer is not connected remove the printer cable from the meter and put the rubber ca...

Page 141: ... pre pare the printer paper and ink ribbon Keep the LF key held down The printer prints only when the LF key is being pressed Setting for a thermal paper printer DPU H245AS Prepare printer paper and turn ON the power switch with the FEED and CHARGE switches held down Set the baud rate of the printer to the above value referring to the instruction manual for the printer Start the function setting m...

Page 142: ...tantaneous value is being displayed in the Measurement mode When the manual data memory storage is performed in the Measurement mode When pressing the ENTER key while in the Data Memory Call mode When calibration or check is performed in the Calibration mode When the ENTER key is pressed in the calibration history display When test printing is selected while in the Maintenance mode ...

Page 143: ...ata is the data con firmed with Auto Hold HOLD is shown Nothing is displayed for the instantaneous value measurement ID 5 digits Temperature compensation setting Manual mode MTC Auto mode ATC REL is displayed during relative mV measurement ID 5 digits Temperature compensation setting Manual mode MTC Auto mode ATC ID 5 digits Unit g L mg L µg L mol L mmol L µmol L Temperature compensation setting M...

Page 144: ...ata is the data con firmed with Auto Hold HOLD is shown Nothing is displayed for the instantaneous value measurement ID 5 digits Unit S m mS m µS m S cm mS cm µS cm Temperature compensation setting Manual mode MTC Auto mode ATC ID 5 digits Temperature compensation setting Manual mode MTC Auto mode ATC ...

Page 145: ...one in 5 4 1 When the ENTER key is pressed in the Measurement mode P 132 Example in the pH Measurement mode Example in the COND Measurement mode Example in the DO Measurement mode 5 4 3 When the ENTER key is pressed in the Data Memory Call screen The format is the same as that described in 5 4 2 When the manual data memory storage is performed in the Measurement mode page 134 Data memory number Da...

Page 146: ...ion mode pH calibration ION COND cell constant calibration DO atmospheric pressure calibration When an error has occurred When pH repeatability is checked When calibration is performed pH 0 00 When calibration is performed When calibration is performed When calibration is performed When an error has occurred ...

Page 147: ...5 Printer 5 4 Printing format 136 HORIBA DO standard solution calibration When calibration is performed When an error has occurred ...

Page 148: ...ECK Washing is needed BAD Replace Sensitivity display Standard solution value is displayed No calibration 1 point calibration None 2 point calibration 1st item 3 point calibration 2nd item Asymmetrical potential at calibration CALIBRATION BAD Date 2003 1 1 mV Value 7mV Slope pH 6 86 4 01 86 4 CAL DATA 2003 1 1 0 19 pH 6 86 0mV ATC 25 0 C 2003 1 1 0 19 pH 4 01 146mV ATC 25 0 C Calibration data Valu...

Page 149: ...istory 5 4 6 Test printing format in the Maintenance mode GOOD Calibration is per formed Sensitivity display Standard solution value is displayed No calibration 1 point calibration None 2 point calibration 1st item 3 point calibration 2nd item Calibration data ...

Page 150: ...ction If an error message is displayed be sure to take appropriate action 6 1 pH ORP electrode maintenance Maintain your electrodes by referring to the following information or to the operation manuals for the electrodes The following explanation is for pH electrodes 9621 10D ORP electrodes should be cared for in the same manner Maintenance after daily use After taking measurements wash the electr...

Page 151: ...the method explained below 1 Remove the electrode from the pH meter 2 Remove the protective cap from the electrode 3 Open the internal solution filler port and use a syringe to remove the internal solution Chemical warning The liquid inside the electrode is highly concentrated potassium chloride 3 33 mol L KCl If the internal solution in the electrode comes in contact with your hands or skin wash ...

Page 152: ...or tissue paper 6 If the liquid on the inside of the electrode cap has dried wash the inside of the electrode cap with pure de ionized water and then after shaking out the water fill the cap with enough pure water to soak the sponge If the solution inside the protective cap for the electrode has dried up and the electrode has not been used for an extended period of time the response speed of the e...

Page 153: ...the electrode is so dirty that it cannot be cleaned by rinsing with pure de ionized water wash the electrode using the most appropriate method below General dirt oily grime Wipe the dirt grime off using cotton gauze that contains a neutral detergent Inorganic grime Rinse using a hydrochloric acid solution or cleaning liq uid 220 of approximately 1 mol L Be sure not to soak the electrode in strong ...

Page 154: ...of the ION electrodes listed in the above table is described on the next page Ion to be measured Ion type Slope Measurement range Elect rode model Compatible tip model Reference solution Potassium K 1 58 mV 0 04 39 000 mg L 6582 10C 7682 3 33 mol L NaCl Calcium Ca2 2 29 mV 0 4 40 080 mg L 6583 10C 7683 3 33 mol L KCl 300 Chloride CI 1 59 mV 0 4 35 000 mg L 6560 10C 7660 1 mol L KNO3 Fluoride F 1 5...

Page 155: ...wing table to prepare it for measurement ION electrode Conditioning agent Time Cl ION electrode No conditioning F ION electrode NO3 ION electrode 1 mol L potassium nitrate solution 100 g L KNO3 Approx 1 hr K ION electrode 0 1 mol L potassium chloride solution 75 g L KCl Approx 12 hr Ca2 ION electrode Tap water Approx 3 hr NH3 ammonia electrode No conditioning ...

Page 156: ...hey are to be stored for up to one day and then reused ION electrode Storage solution Cl ION electrode de ionized water F ION electrode NO3 ION electrode 1 mol L potassium nitrate solution 100 g L KNO3 K ION electrode 0 1 mol L potassium chloride solution 75 g L KCl Ca2 ION electrode Tap water NH3 ammonia electrode 0 01 mol L ammonium chloride solution ...

Page 157: ...t been used for a long period of time some of the sample may have entered the reference solution outer tube or the reference solution may have become weak For this reason perform the following operations from once a week to once a month to replace the internal solution within the reference electrode outer tube 1 Open the internal solution filler port by removing the rubber stopper turn the electro...

Page 158: ...horizontal surface with the bottom of the electrode the side with the rubber cap facing down Push the electrode down two or three times to make the reference solution seep out through the liquid junction Filling internal solution inner tube The inner tube of the electrode is of an air tight construction that allows almost no outflow Replace the internal solution inner tube however if the electrode...

Page 159: ...de and put the rubber cap on the tip type electrode part 2 Remove the rubber stopper from the reference solution outer tube filler port and take out the internal solution using a syringe 3 Twist the electrode cap by hand and move it approximately 5 to 10 centimeters toward the electrode connector 4 Remove the internal body of the electrode by holding the electrode cap by hand and then pushing the ...

Page 160: ...wash them with pure de ionized water 3 Insert the internal body into the external body Make sure that the O ring is properly in place 4 Return the spring to the top of the internal body 5 Hold the rubber sleeve in place by hand then twist the electrode protective cap 90º and fit the rubber sleeve into the electrode protective cap 6 Maneuver the parts so that the HORIBA logo faces the same directio...

Page 161: ... Daily maintenance page 146 10 Store the electrode in accordance with the sec tion entitled Short term storage page 145 Cable Connector cover Electrode connector O ring Silicon tube Internal solution inlet rubber stopper inner tube Internal body Rubber cap Rubber sleeve Electrode cap Spring Internal solution inlet rubber stopper outer tube Tip type ION electrode External body ...

Page 162: ...store it after performing the following procedure Also perform maintenance on the electrode every three to six months 1 Remove the electrode from the meter 2 Use pure de ionized water to wash away any sample solution that may have adhered to the electrode 3 Wash the inside of the electrode protective cap with pure ion exchange water then after shaking out the water fill the cap with enough pure de...

Page 163: ... oxygen electrode maintenance Refer to the electrode operation manuals for how to maintain each electrode 6 4 1 Field use electrode Maintenance after daily use 1 Wash the electrode well with tap water 2 Store the DO tip by immersing it in tap water Leave the electrode connector attached to the pH meter ...

Page 164: ... the water drops using cotton gauze 3 Remove the DO tip from the holder 4 Place the socket over the DO tip and then store it by placing it in its original packaging and sealing it air tight Cleaning electrodes If the electrode membrane is dirty gently wipe it with soft tissue paper or cotton gauze Be careful not to push on the membrane with too much force Use caution not to damage the DO tip membr...

Page 165: ...tory use electrode Maintenance after daily use 1 Wash the electrode well with pure de ionized water 2 Store the DO tip by immersing it in zero standard solution Leave the electrode connector attached to the pH meter Wash bottle containing de ionized water Membrane Zero standard solution Sensor adapter ...

Page 166: ... air tight Be careful not to damage the DO tip membrane When using a neutral detergent for cleaning be careful not to allow the detergent to come in contact with the membrane When conducting air calibration after the electrode has been stored first connect the electrode to the main unit of the pH meter and allow it to stand in the open air for two hours prior to conducting the calibration Cleaning...

Page 167: ...he electric potential did not stabilize within three minutes 04 Asymmetric potential error pH The asymmetric potential of the electrode is 45 mV or more 05 Electrode sensitivity error pH The electrode sensitivity is either 105 or more or 85 or less than the theoretical sensitivity DO The electrode sensitivity is out of the standard 06 Max calibration points exceeded pH No more than three points ca...

Page 168: ...be guaranteed when ERR No 02 is displayed Cause How to solve problem The pH meter does not start operating cor rectly even after the power is turned ON Take the battery from the pH meter and disconnect the AC adapter Then press the ON OFF key for about 10 seconds The internal IC is defective Seek repairs at your nearest retail outlet or HORIBA service station Cause How to solve problem The battery...

Page 169: ... concentration or temperature change Press the MEAS key again while HOLD is either brinking or steadily lit in the display to measure the sample using instantaneous value measurement The electrode is dirty Wash the electrode The electrode is cracked Replace the electrode The responsive glass membrane of the electrode has been dry for a long time Soak the membrane on the electrode in pure de ionize...

Page 170: ... The electrode is cracked Replace the electrode The reference solution concentration is fluctuating Replace the internal solution in the reference electrode The electrode is not connected correctly Connect the electrode correctly The electrode is not submerged deeply enough to cover the liquid junction tip Immerse the electrode in the sample at least three centimeters deep There is problem with th...

Page 171: ...he electrode is dirty Wash the electrode The electrode is cracked Replace the electrode Calibration was not performed correctly Redo the calibration correctly There is a problem with the standard solution Use fresh standard solution The electrode is not connected correctly Connect the electrode correctly Electrode is not submerged deeply enough to cover reference junction Immerse the electrode in ...

Page 172: ... pressure correction There is liquid on the DO tip membrane when conducting air calibration Let the electrode sit until the liquid evaporates or remove the liquid using soft tissue paper making sure not to scratch the membrane There is something wrong with the standard solution when conducting standard solution calibration Prepare new zero and span standard solutions The stirring is inappropriate ...

Page 173: ...alibration point This error does not affect calibration data obtained from previous three calibration points Refer to Standard solution calibration page 27 Cause How to solve problem Calibration was performed on a fourth calibration point Limit the number of calibration points to three This error message is cleared by setting the pH meter to Measurement mode ...

Page 174: ... since the last calibration was conducted Calibrate again Cause How to solve problem There is a problem with the standard solution Prepare new standard solution There is a problem with the standard solution setting Check the NIST or US standards settings and the kind of standard solution used for calibration and make sure they match The responsive membrane is dry or dirty Measure after washing the...

Page 175: ...tion The number of data items has exceeded the limit of the memory Cause How to solve problem The printer paper is jammed Remove the jammed paper There is no printer paper Load the printer with paper There is a problem with the printer connection Reconnect the printer after making sure there is nothing wrong with the connector parts The printer is defective Replace the printer Cause How to solve p...

Page 176: ... out of range Explanation The cell constant is out of the range of 0 7 to 1 3 Delete data stored in the memory after confirming their con tents Cause How to solve problem COND electrode is at the end of its useful life Replace the electrode Improper standard solution Prepare new standard solution ...

Page 177: ...lve problem No batteries Place batteries in the meter The batteries are loaded with the poles reversed Re insert the batteries with the poles correctly oriented The battery voltage is low Remove the old batteries and correctly insert new dry cell batteries Or connect the unit to the optional AC adapter Cause How to solve problem The responsive membrane is dry or dirty Wash the responsive membrane ...

Page 178: ... How to solve problem There is a motor or other device causing electrical interference Move the meter to a place where it is not subject to dielectric effects Be sure to ground devices that are using commercial electricity The electrode is not connected correctly Connect the electrode correctly Cause How to solve problem The liquid junction is not immersed in the sample solution Immerse the electr...

Page 179: ...orn out Replace the electrode There is a problem with the reference solution Fill the electrode with new reference solution as noted in the electrode instruction manual Cause How to solve problem The key lock function is ON Turn the power OFF and then turn it back ON again The system is locked Turn the power OFF and then turn it back ON again The electrode connector is not attached correctly Attac...

Page 180: ...layed Display range 0 00 19 99 when cell constant is 100 m 1 The measured DO value exceeds the measurement parameters when DO value is displayed Display range 0 00 19 99 Cause How to solve problem The sample solution is inappropriate Change to a sample solution with properties within the measurement range The liquid junction is not immersed in the sample solution Immerse the electrode in the sampl...

Page 181: ...hort the meter by touching both the center pin and some metal part in the electrode connector If the flaching measured value disappears when this done the meter is nomal CLR is flashing during ION measurement Concentration cannot be measured correctly Cause How to solve problem The pH meter is in default initial ized status Calibrate the pH meter ...

Page 182: ...ithin the electrode is severed or shorted Measure the resistance of the temperature sensor connector If it is 50 kΩ or more at room temperature replace the electrode The electrode connector is not attached properly Attach the electrode connector properly so that the O ring on the temperature connector disappears from sight The main unit of the meter may be defective In Temperature Display Calibrat...

Page 183: ...When running a test print according to the manual does it print out correctly Cause How to solve problem Some effects of the sample solution The pH or other properties of the sample solution may have changed over time making repeatability poor The responsive membrane is dry or dirty Wash the responsive membrane There is not enough reference solution or it is dirty Replace the reference solution wi...

Page 184: ...s chapter provides a simple compilation of information for those who would like to know about the functions of the main unit of the meter and other measurement principles in greater detail It also serves as a reference for spare and optional parts ...

Page 185: ...he electric potential differs depending on the type of solution the temperature of the solution and the structure of the liquid junction When solutions of different compositions come in contact ION diffusion occurs on the contact surface between the two solutions The ions are of various sizes so a difference occurs in the diffusion transfer speed As diffusion proceeds a difference in charges occur...

Page 186: ...ctuality however a potential does occur This potential is called asymmetric potential The size of the asymmetric potential differs depending on any stress that may have occurred during the processing of the glass and the shape and compositions of the glass Asymmetric potential also changes depending on the degree of contamination of the reference solution and the state of the glass membrane Also i...

Page 187: ...ion temperature is not recorded the results of the pH measurement are relatively meaningless Types of pH standard solutions When measuring pH the pH meter must be calibrated using a standard solution There are several kinds of standard solutions For normal measurement three standard solutions with a pH of 4 7 and 9 are sufficient to accurately calibrate the meter pH 1 68 standard solution Oxalate ...

Page 188: ... solution Phthalate pH 6 86 standard solution Neutral phosphate pH 9 18 standard solution Borate pH 12 45 standard solution 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 12 627 25 1 679 4 008 6 865 9 180 12 454 30 1 683 4 015 6 853 9 139 12 289 35 ...

Page 189: ...ndard settings Calibration is performed using Nernst s equation with the above values Temp C pH 7 standard solution Neutral phosphate pH 10 standard solution Carbonate 0 7 119 10 318 5 7 086 10 245 10 7 058 10 178 15 7 035 10 117 20 7 015 10 061 25 7 000 10 011 30 6 988 9 965 35 6 979 9 925 40 6 973 9 888 45 6 969 9 856 ...

Page 190: ...ion Use the pH 7 standard solution or a standard solution that approximates the pH value of the solution that is to be inspected When it is known beforehand whether the test solution is acidic or alkaline 2 point calibration Acidic Use the pH 4 and 7 standard solutions Alkaline Use the pH 7 and 9 standard solutions When an unknown solution is to be inspected 3 point calibration Use the pH 4 7 and ...

Page 191: ... For one type of equilibrium in a solution Mz ne M z n If only exists within a solution a metal electrode platinum gold etc and a reference electrode are inserted into the solution forming the ORP measuring system shown in Fig 1 Measuring the potential ORP that exists between the two electrodes enables the potential to generally be expressed by the following equation E Electric potential E0 Coeffi...

Page 192: ... This means that under actual conditions ORP cannot be expressed using the simple equation shown above and that the physical and chemical significance with respect to the solution is not very clear In this respect the value of ORP must be understood to be only one indicator of the property of a solution The measurement of ORP is widely used however as an important index in the analysis of solution...

Page 193: ... is measured using an Ag AgCl with 3 33 mol L KCl electrode is expressed by the following equation EN H E E 206 0 7 t 25 mV t 0 60ºC EN H E Measured ORP value using N H E as the reference electrode E Measured ORP value using Ag AgCl with 3 33 mol L KCl as the reference electrode Potential sign Standard ORP is expressed in the following way in literature related to electrochemistry and analytical c...

Page 194: ...mstances it is sufficient to use only that type of substance which is closest to the measured value Indicated value of ORP standard solution at various temperatures mV temp ºC 160 22 Phthalic acid chloride quinhydrone 160 51 Neutral phosphate quinhydrone 5 274 2 111 9 10 270 9 106 9 15 266 8 101 0 20 262 5 95 0 25 257 6 89 0 30 253 5 82 7 35 248 6 76 2 40 243 6 69 0 ...

Page 195: ...e 3 If the electrode and the meter itself are working correctly numerical values within 15 mV of those listed in Table 1 should be obtained 4 If measurements falling within 15 mV of the values listed above are not obtained using this method measure the solution again after replacing the reference electrode internal solution and removing any dirt from the surface of the metal electrode by moistenin...

Page 196: ... measured values may not stabilize or the results of measurement might not be repeatable If this is the case use the meter after immersing the electrodes in the solution again and mixing it thoroughly Precautions when measuring actual samples Note that when measuring the ORP of a solution that has extremely low concentrations of oxidants and reductants such as tap water well water or water treated...

Page 197: ...o the system This includes the standard potential of the reference electrode and the liquid junction potential F Faraday constant 96 480 Cmol 1 R General gas constant 8 314 JK 1mol 1 T Absolute temperature K n ION charge γ Activity coefficient C ION concentration mol L The above formula is called Nernst s equation and is the basis for measuring ION concentration using an ION electrode The part of ...

Page 198: ... if the concentration is plotted on a logarithmic axis as shown in Fig 2 Conducting quantitative analysis using an ION electrode requires either an ION meter that has an antilog calculation function or the creation of a calibration curve using similog graph paper Fig 2 Relationship between ION concentration and electric potential Calibration curve for univalent positive ION electrode Potential mV ...

Page 199: ...or calibration In such cases the standard solution with the lower ION concentration should have 1 10 the concentration of the standard solution with the higher concentration If the approximate ION concentration of the liquid to be measured is unknown choose low and high concentration standard solutions with a larger differential than the 1 10 used in the above example However be sure not to exceed...

Page 200: ...at has been used should not be returned to the original container It should be discarded Storing standard solution Standard solution must be stored in an air tight container and should be kept in a cool dark place If standard solution is not stored in an air tight container it will evaporate and become contaminated with impurities causing the concentration to change ...

Page 201: ...ant See page 52 Preparing potassium chloride standard solution How to prepare solution Dry the potassium chloride powder superior quality commercial potassium chloride or better for two hours at 105 ºC then cool it in a desiccator Measure out the above listed amount of potassium chloride into a beaker and dissolve it in de ionized water Then pour this solution into 1 liter volumetric flask and add...

Page 202: ... kind of conductivity that pertains to ions especially the conductivity of electrolytic solution that uses water as the solvent As shown in Fig 3 two pole plates with an area A expressed in m2 are positioned parallel to each other separated by distance l expressed in m Then solution is poured into the cell until it is full and alternating current is run between the plates Fig 3 Conductivity cell e...

Page 203: ...cific conductivity and is widely used as an index to express the ease with which current flows Specific conductivity L is generally referred to as simply conductivity and is expressed in units of S m Inserting conductivity L expressed in S m into equation 1 results in equation 2 below R J L Equation 2 As is clear from equation 2 when a conductivity cell having a cell constant J of 1 m 1 is used in...

Page 204: ...ctive its ions and the higher its conductivity Using a given temperature as the standard and calling that the standard temperature the temperature coefficient expresses how much change expressed in occurs in conductivity when the temperature of the solution changes by 1ºC The temperature coefficient is expressed in units of ºC standard temperature This temperature coefficient is found by assuming ...

Page 205: ... the temperature change is not very large The meter is equipped with a built in automatic temperature conversion function enabling them to automatically calculate and display based on the actual temperature measurement the conductivity of a sample at 25ºC using a temperature coefficient of 2 ºC ...

Page 206: ...4 15 34 63 2 49 15 16 42 2 12 20 32 70 2 99 20 19 57 2 16 30 20 22 4 50 25 21 35 2 27 40 11 64 6 48 Na2SO4 18 5 4 09 2 36 KOH 15 25 2 54 03 2 09 10 6 87 2 49 29 4 54 34 2 21 15 8 86 2 56 33 6 52 21 2 36 Na2CO3 18 5 4 56 2 52 42 42 12 2 83 10 7 05 2 71 NH3 15 0 1 0 0251 2 46 15 8 36 2 94 1 6 0 0867 2 38 KCl 18 5 6 90 2 01 4 01 0 1095 2 50 10 13 59 1 88 8 03 0 1038 2 62 15 20 20 1 79 16 15 0 0632 3 ...

Page 207: ...1 94 100 1 4 1 87 0 30 30 28 41 1 68 50 36 22 1 56 HNO3 18 6 2 31 23 1 47 CuSO4 18 2 5 10 90 2 13 12 4 54 18 1 42 5 18 90 2 16 31 78 19 1 39 10 32 00 2 18 49 6 63 41 1 57 15 42 10 2 31 62 49 64 1 57 CH3CO OH 18 10 15 26 1 69 H3PO4 15 10 5 66 1 04 15 16 19 1 74 20 11 29 1 14 20 16 05 1 79 40 20 70 1 50 30 14 01 1 86 45 20 87 1 61 40 10 81 1 96 50 20 73 1 74 60 4 56 2 06 Sub stance Temp ºC Conc wt C...

Page 208: ...xed to an oxygen permeable membrane and a base metal lead is used as the anode Both the cathode and anode are immersed in an alkaline electrolytic solution The external circuit between the anode and cathode is closed Oxygen that diffuses through the oxygen permeable membrane causes the following chain reaction to occur in the cathode and allows current to flow in the external circuit O2 2H2O 4e 4O...

Page 209: ...position of the solution Generally the higher the salinity concentration within a solution the larger H becomes and consequently the smaller C becomes DO tips actually detect the Ps that occurs in the above equation This means that even if a DO tip is immersed in pure water that is saturated with air or in an aqueous solution containing salt the output current will not change which gives rise to a...

Page 210: ...when calibrating and the meter will automatically be calibrated using the air pressure corrected value Air pressure correction is calculated using the equation below When calibration is finished the value derived from this equation is displayed Compensated value 1013 P x measured value P is the air pressure hPa set in the meter Saturated DO levels in water at various temperatures with a salinity c...

Page 211: ...ange pH 0 00 14 00 Resolution 0 01 pH Repeatability 0 01 pH 1digit Temp Measurement principle Thermistor Measurement range 0 0 100 0 ºC Resolution 0 1 ºC Repeatability 0 1 ºC 1digit mV Measurement range 1999 mV Resolution 1 mV Repeatability 1 mV 1digit Ion Measurement principle ION electrode Measurement range 0 00 µg L 999 g L mol L Resolution 3 digit valid numbers Repeatability 0 5 1 digit of ful...

Page 212: ...ale Repeatability 0 5 1 digit of full scale Dissolved Oxygen Measurement principle Membrane galvanic cell Measurement range 0 00 19 99 mg L Temperature compensation 0 40 ºC Resolution 0 01 mg L Repeatability 0 1 mg 1 digit Target Item Description D 52 D 53 D 54 D 55 Data memory capacity Max 300 pieces of data Power Dry cell batteries type AA alkaline with automatic power OFF function Ambient tempe...

Page 213: ...on 25 ºC Automatic power OFF Approx 30 min ON Sample ID 00000 Calibration cycle OFF Auto data memory OFF pH Standard calibration solution NIST Calibration setting Asymmetric potential 0mV Sensitivity 100 Ion Ion slope 1 Unit g L Channel setting CH1 pH CH2 ion Conductivity Unit S m Temperature coefficient 2 0 ºC ON Cell constant 1 0 x 100 m 1 Dissolved oxygen Salinity 0 0 ppt Air pressure 1013 hPa ...

Page 214: ...g Clock display 1 pH Measurement mode instantaneous value Clear Hold Automatic release of Hold 4 mV Measurement mode instantaneous value 6 Relative mV Measurement mode 5 Auto Hold Measurement 7 Auto Hold Measurement Clear Hold Setting mode 1 2 4 5 6 7 1 Calibration history display Data storage Memory call up 3 Repeatability check If you press the CAL key in the mV Instantaneous Value Measurement m...

Page 215: ...ear Hold 1 2 4 5 6 7 8 9 1 Auto Hold calibration 5 Auto Hold Measurement 7 Auto Hold Measurement 8 ION Measurement CH2 mode instantaneous value Calibration mode instantaneous value Offset potential setting 9 Auto Hold Measurement Auto Hold calibration Clear Hold Automatic release of Hold 4 mV Measurement CH2 mode instantaneous value 6 Relative mV Measurement mode Clock display Clock setting To pH ...

Page 216: ... mV Measurement mode Clear Hold 1 2 4 5 6 7 8 9 1 Auto Hold calibration 5 Auto Hold Measurement 7 Auto Hold Measurement 9 Auto Hold Measurement Conductivity One point Calibration mode Clear Hold 4 mV Measurement CH2 mode instantaneous value 6 Relative mV Measurement mode Clock display Clock setting To pH Measurement CH1 mode Calibration history display Data storage Setting mode Memory call up Repe...

Page 217: ...mV Measurement mode Clear Hold 1 2 4 5 6 7 8 9 1 Auto Hold calibration 5 Auto Hold Measurement 7 Auto Hold Measurement 8 DO Measurement CH2 mode instantaneous value 9 Auto Hold Measurement Auto Hold calibration Clear Hold Automatic release of Hold 4 mV Measurement CH2 mode instantaneous value 6 Relative mV Measurement mode Clock display Clock setting To pH Measurement CH1 mode Calibration history ...

Page 218: ...nter CBM 910 24RJ100 A 7 9 3 Cable for SEIKO printer DPU H245AS A03A Meter main unit MINI DIN8M Printer D SUB 9 PIN 2 CTS 7 RTS 3 TXD 2 RXD 4 GND 5 GND 5 RXD 3 TXD Meter main unit MINI DIN8M Printer D SUB 25 PIN 2 CTS 20 BUSY 3 TXD 3 RXD 4 GND 7 GND 5 RXD 2 TXD Meter main unit MINI DIN8M Printer D SUB 25 PIN 2 CTS 8 BUSY 3 TXD 3 DATA 4 GND 5 GND 5 RXD 2 OPEN ...

Page 219: ...andard electrode 9621 10D 9096001700 Plastic body electrode for immersion measurement F 50 series standard electrode 9611 10D 9096001800 Glass body electrode reinforced responsive glass Laboratory use electrode for slurry samples 9677 10D 9096002000 Built in washable reference electrode reinforced responsive glass Laboratory use electrode for micro samples 9669 10D 9096001900 Electrode incorporati...

Page 220: ...ectrode without built in temperature sensor 6861 10C 9003013100 Bar shaped platinum type Part name Model Part number Remarks Chloride ION electrode 6560 10C 9003014500 Combined ION electrode Fluoride ION electrode 6561 10C 9003014600 Combined ION electrode Nitric acid ION electrode 6581 10C 9003014700 Combined ION electrode Potassium ION electrode 6582 10C 9003014800 Combined ION electrode Calcium...

Page 221: ...ctrode Part name Model Part number Remarks Chloride ION tip 7660 9003015000 For 6560 10C Fluoride ION tip 7661 9003015100 For 6561 10C Nitric acid ION tip 7681 9003015200 For 6581 10C Potassium ION tip 7682 9003015300 For 6582 10C Calcium ION tip 7683 9003015400 For 6583 10C ...

Page 222: ...37006900 6582 10C For outer tube 50mL Internal reference solution 330 9037005200 For all 65XX 10C For inner tube 250mL Part name Model Part number Remarks Water proof type conductivity electrode 9382 10D 9096000300 Water proof Cell constant 100 m 1 Conductivity electrode 3551 10D 1 9056000800 For low conductivity Cell constant 10 m 1 3553 10D 1 9056001000 For high conductivity Cell constant 1000 m...

Page 223: ...me with only one electrode in the sample Actual cell constants vary within 10 of the above values DO electrode DO electrode spare tip Part name Model Part number Remarks Water proof DO electrode 9520 10D 9096000500 Water proof type For laboratory use 9551 20D 9096002300 On site immersion type Cable length 2 m 9551 100D 9096002400 On site immersion type Cable length 10 m Part name Model Part number...

Page 224: ...700 pH9 standard solution 100 9 9003001800 Part name Model Part number Remarks pH2 standard solution powder 150 2 9003002600 Makes 500mL 10 packets Accuracy 0 05 pH pH4 standard solution powder 150 4 9003002700 pH7 standard solution powder 150 7 9003002800 pH9 standard solution powder 150 9 9003002900 Part name Model Part number Remarks Standard solution for ORP check 160 51 9003003100 ORP 95 mV F...

Page 225: ...HORIBA Internal reference solution Cleaning liquid Part name Model Part number Remarks Internal reference solution 300 9003003200 250 mL Part name Model Part number Remarks Cleaning liquid for electrodes 220 9096002500 For pH ORP and ION electrodes ...

Page 226: ... Japan 9096003200 For US 9096003300 For Europe 9096003400 Plain paper printer Printer For Japan 9096003500 For US 9096003600 For Europe 9096003700 Printer cable 9096003800 Roll paper 9096003900 Ink ribbon 9096004000 Serial cable 9096004800 Data collection software 9096005000 For PC Soft case 9096005100 Strap 9096005200 For the meter Stand for electrode 9096002700 Stand arm 9096002800 Protective ca...

Page 227: ...For more information please contact us ExpotechUSA 10700 Rockley Road Houston Texas 77099 USA 281 496 0900 voice 281 496 0400 fax E mail sales expotechusa com Website www ExpotechUSA com ...

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