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2 Taking Measurements

2.5 Conductivity measurement

ES-51

2.5

Conductivity measurement

The following shows the operational flow for conductivity
measurement.

●

Measuring conductivity: basic operational flow

2. Conductivity Measurement mode (instantaneous value)

Power ON

1. Electrode preparation

“

●

Setting the clock” page 31

“3.3.6 Conductivity unit setting” page 38

“3.3.7 Temperature coefficient setting” page 38

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

“3.3.4 Auto data storage setting” page 35

“3.3.5 Sample ID# setting” page 37

6. Auto Hold Measurement

“3.1 Data memory function” page 27

Summary of Contents for ES-51

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: ...ifferential 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 att...

Page 4: ...ment categories and 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...

Page 5: ...o 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 possi...

Page 6: ...ury 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...

Page 7: ...ding 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 th...

Page 8: ...urement modes 16 2 4 Selecting the measurement modes 18 2 5 Conductivity measurement 19 3 Functions 27 3 1 Data memory function 27 3 2 Displaying and setting the clock 30 3 3 Setting modes 32 3 3 1 En...

Page 9: ...een 75 5 4 4 When calibration or check is performed in the Calibration mode 76 5 4 5 Test printing format in the Maintenance mode 76 6 Maintenance and Troubleshooting 77 6 1 Conductivity electrode mai...

Page 10: ...hapter 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 con...

Page 11: ...w of the Meter 1 1 Package contents 2 HORIBA Soft case 1 pc Operation manual 1 book To take measurements you will need electrode s Refer to 7 6 Spare and optional parts page 104 when purchasing the el...

Page 12: ...nity Resistivity Temperature Function Explanation Page No Data memory Stores the data of measured values and temperature to the memory max 300 items page 27 Clock Displays the time on the screen and r...

Page 13: ...ures the sample temperature using the temperature sensor built in the electrode and Manual Temperature Compensation MTC mode that uses user specified temperature page 34 Auto data memory Stores data a...

Page 14: ...ry voltage page 42 Temperature zero adjustment Carries out temperature calibration page 43 Auto Power OFF Sets the function that automatically turns the power OFF if no keys are touched 30 minutes pag...

Page 15: ...Meter 1 3 Part names 6 HORIBA 1 3 Part names The ES 51 conductivity meter has the following parts Display Keys AC connector Dry cell battery holder Serial communication port Temperature connector Ele...

Page 16: ...urement unit Setting modes differ according to model Cursor for selecting setting modes Error No Data No Year Status display Measurement data hour and minute Calibration history Part name Display Cont...

Page 17: ...ayed 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 Sometimes disp...

Page 18: ...tely 30 minutes Name Description MEAS key Returns to the Measurement mode Starts measurement MODE key Selects measurement item SET key Selects setting item CELL key Enters the Cell Constant Setting mo...

Page 19: ...nductivity electrode Temperature connector Temperature electrode Electrode connector G R electrode 1 Insert the electrode connector making sure to align the connector grooves with the pins in the conn...

Page 20: ...f this cover is placed properly over the connector Temperature connector 1 Insert the temperature connector into the jack on the main unit until the O ring on the electrode cannot be seen at all see p...

Page 21: ...lock 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 op...

Page 22: ...t the edge of 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 l...

Page 23: ...on 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 H...

Page 24: ...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 c...

Page 25: ...solution being measured Instantaneous Value Measurement mode The ES 51 conductivity meter performs instantaneous value measurement as the default measurement mode when the power is first turned ON and...

Page 26: ...e initial screeen displayed to make HOLD blink on the display When the measured value becomes stable HOLD will stop blinking and remain displayed and the measured value will remain displayed To clear...

Page 27: ...y changes the measurement mode The last measurement mode item is the clock display Pressing the MODE key once more returns the display to the first measurement mode Power ON Resistivity Measurement mo...

Page 28: ...lue Power ON 1 Electrode preparation Setting the clock page 31 3 3 6 Conductivity unit setting page 38 3 3 7 Temperature coefficient setting page 38 3 Cell constant setting 4 Calibration mode About on...

Page 29: ...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 mo...

Page 30: ...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...

Page 31: ...pare a standard solution of potassium chloride refer to Preparing potassium chloride standard solution page 92 1 Immerse the electrode in the standard solution of potassium chloride 2 Enter the Calibr...

Page 32: ...the CELL 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 t...

Page 33: ...ed 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...

Page 34: ...the conductivity electrode Enter the Salinity Measurement mode by pressing the MODE key in the Conductivity Measurement mode Resistivity measurement Resistivity can be measured using the conductivity...

Page 35: ...2 Taking Measurements 2 5 Conductivity measurement 26 HORIBA...

Page 36: ...Data memory In all measurement 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 meas...

Page 37: ...D setting page 37 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 t...

Page 38: ...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...

Page 39: ...the clock 30 HORIBA 3 2 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...

Page 40: ...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 pres...

Page 41: ...g 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 s...

Page 42: ...COND Unit Setting Sets the unit for conductivity measurement page 38 COND TC Setting Sets the temperature coefficient for the sample to be measured in Conductivity Measurement mode page 38 Data Memor...

Page 43: ...nsation 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 connec...

Page 44: ...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 se...

Page 45: ...Measurement mode 2 Press 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...

Page 46: ...rval If the number of stored data items exceeds 300 data storage will stop and the error message ERR No 10 will be displayed 3 3 5 Sample ID setting Setting the sample ID records its sample ID number...

Page 47: ...Use the ENTER key to toggle between S m and S cm units 3 3 7 Temperature coefficient setting 1 Press the SET key in the Measurement mode and select the COND TC Setting mode 2 Pressing the ENTER key t...

Page 48: ...Functions 3 3 Setting modes ES 51 39 3 3 8 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 mo...

Page 49: ...ation when the temperature sensor is immersed in a liquid of known temperature page 43 03 Automatic power off setting Turns Automatic Power off function ON OFF and sets time period after which the pow...

Page 50: ...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 vo...

Page 51: ...t 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 temper...

Page 52: ...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 ca...

Page 53: ...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 b...

Page 54: ...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 HI...

Page 55: ...the meter to the original settings 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...

Page 56: ...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...

Page 57: ...3 Functions 3 3 Setting modes 48 HORIBA...

Page 58: ...sfer 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 star...

Page 59: ...e 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 rubb...

Page 60: ...ssage 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 meter does not accept the operation it returns an error message in the...

Page 61: ...OL page 54 Halt potential hunting BR page 57 Conductivity Measurement mode designation CO page 54 Salinity measurement designation SA page 55 Resistivity measurement designation OH page 56 Start measu...

Page 62: ...1 53 Request data commands Request for Command Page No Header Command code Clock data R OT page 61 Measurement MD page 62 Number of stored data items MC page 64 Memory data MS page 65 Model inquiry A...

Page 63: ...the meter is switched from off line to on line the status of the meter is the same as when a command has been received LOCK is displayed Conductivity Measurement mode designation command format This c...

Page 64: ...peration commands ES 51 55 Salinity Measurement mode designation command format This command is always valid when on line The meter enters the Salinity Instantaneous Value display Command code Salinit...

Page 65: ...ivity Instantaneous Value display Start measurement command format When the meter status is Instantaneous Measurement Auto Hold Measurement will start If the command is issued during a measurement hol...

Page 66: ...ration commands ES 51 57 Halt potential hunting command format This command is valid when on line only during measurement on AUTO HOLD Issuing this command halts measurement on AUTO HOLD Header Comman...

Page 67: ...ll constant Setting ranges for calibration values When units are S 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 cel...

Page 68: ...r 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 Heade...

Page 69: ...rmat 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 b...

Page 70: ...s ES 51 61 Clock data request command and response Request command format 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...

Page 71: ...3 Conductivity 5 Salinity 6 Resistivity Channel number 1 digit 1 1CH Measurement or calibration 1 digit 0 Measurement 1 Calibration Measurement status 1 digit 0 Instantaneous value 1 Hold 2 Potential...

Page 72: ...er 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 any calibration error is produced Potential...

Page 73: ...ications 4 4 Data request commands and responses 64 HORIBA Request command for number of stored data items and its response Request command format Meter response format Header Command data Header Numb...

Page 74: ...4 RS 232C communications 4 4 Data request commands and responses ES 51 65 Request command for memory data and its response Request command format Header Memory No Command code...

Page 75: ...Minutes 2 digit 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 SP Measurement status 2 digit 0 Instantaneous value 1 Hold 2 Potential hunt in pr...

Page 76: ...tion type is 0 The latest data is output regardless of occurrence of measurement errors 1 SP is output when any calibration error is produced Potential 5 digit Temperature setting 1 digit 0 ATC 1 MTC...

Page 77: ...mmand 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 Hea...

Page 78: ...al 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 b...

Page 79: ...ted 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...

Page 80: ...U 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 co...

Page 81: ...re 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 tur...

Page 82: ...eous 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 calib...

Page 83: ...ivity Measurement mode When the data 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 S m S cm mS cm S cm Temp...

Page 84: ...4 1 When the ENTER key is pressed in the Measurement mode P 74 Example in the COND Measurement mode Example in the Salinity Measurement mode Example in the Resistivity Measurement mode 5 4 3 When the...

Page 85: ...5 4 Printing format 76 HORIBA 5 4 4 When calibration or check is performed in the Calibration mode COND cell constant calibration 5 4 5 Test printing format in the Maintenance mode When calibration is...

Page 86: ...messages Daily maintenance is vital in assuring accurate measurement and preventing breakdowns before they occur Maintenance of the electrodes is especially important if ignored various problems and e...

Page 87: ...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 samp...

Page 88: ...ng in the lower left hand corner of the display 6 2 1 Error message chart ERR No Message Explanation 01 Memory error Data cannot be read from or written to the internal memory 02 Battery voltage low T...

Page 89: ...en ERR No 02 is displayed Cause How to solve problem The conductiv ity meter does not start operat ing correctly even after the power is turned ON Take the battery from the conductiv ity meter and dis...

Page 90: ...oncentration 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 di...

Page 91: ...ion 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 T...

Page 92: ...f 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...

Page 93: ...eries 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 co...

Page 94: ...s not connected correctly Connect the electrode correctly Cause How to solve problem Some effects of the sample Determine if this is the cause by measuring with a stable standard solution Cause How to...

Page 95: ...ause 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 i...

Page 96: ...diagram use a jumper wire or bent paper clip to short 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...

Page 97: ...n the electrode is severed or shorted Measure the resistance of the temperature sensor connector If it is 50 k or more at room temperature replace the electrode The electrode connector is not attached...

Page 98: ...When the printer will not print even though it is connected Check the following points Is the printer turned ON Has a printer error occurred Is there printing paper Has the paper jammed When running a...

Page 99: ...6 Maintenance and Troubleshooting 6 2 Troubleshooting 90 HORIBA...

Page 100: ...ter 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...

Page 101: ...nt See page 22 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 C...

Page 102: ...of conductivity that pertains to ions especially the conductivity of electrolytic solution that uses water as the solvent As shown in Fig 1 two pole plates with an area A expressed in m2 are positione...

Page 103: ...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 Insert...

Page 104: ...its The following conversion table is provided for people who are used to using the conventional kind of conductivity meter Note that along with the change in unit systems the measurement values and c...

Page 105: ...e temperature coefficient is expressed in units of C standard temperature This temperature coefficient is found by assuming that the conductivity of the sample changes linearly in relation to temperat...

Page 106: ...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 Na2C...

Page 107: ...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 C...

Page 108: ...Repeatability 0 1 C 1digit Conductivity Measurement principle 2 AC electrode Measurement range Cell constant 100 m 1 0 000 S m 19 99 S m Cell constant 10 m 1 0 0 S m 1 999 S m Cell constant 1000 m 1 0...

Page 109: ...constant 10 m 1 50 0 m 1 999 M m Cell constant 1000 m 1 0 500 m 19 99 k m Resolution 0 05 of full scale Repeatability 0 5 1 digit of full scale Data memory capacity Max 300 pieces of data Power Dry ce...

Page 110: ...ault values Common setting Temperature compensation Automatic temperature compensation Manual temperature compensation 25 C Automatic power OFF Approx 30 min ON Sample ID 00000 Auto data memory OFF Co...

Page 111: ...e instantaneous value Cell constant setting Conductivity One point Calibration mode 2 Auto HOLD measurement 4 Auto HOLD measurement 5 Resistivity Measurement mode 6 Auto HOLD measurement Clock display...

Page 112: ...CBM 910 24RJ100 A 7 5 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...

Page 113: ...above values Water proof type conductivity electrode 9382 10D 9096000300 Water proof Cell constant 100 m 1 Conductivity electrode 3551 10D 9056000800 For low conductivity Cell constant 10 m 1 3553 10D...

Page 114: ...ter Cable For 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 9096...

Page 115: ...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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