USER MANUAL AD8000 pH/mV/EC/TDS/Temperature Bench Meter
Contents
1. Resolution 0 01 pH 0 001 pH 0 1 mV 699 9 mV 1 mV 2000 mV 0 01 0 1 1 uS cm ppm 0 01 0 1 mS cm ppt 0 1 C Accuracy 0 01 pH 0 002 pH 25 C 0 2 mV up to 699 9 mV 1mV up to 2000 mV 1 f s EC TDS 0 5 C Relative mV offset range 2000 mV pH Calibration Up to 3 point calibration 5 buffer available 4 01 6 86 7 01 9 18 10 01 pH EC Calibration Offset at 0 00 uS cm Slopeat 1 point with 6 memorized values 84 0 1413 uS cm 5 00 12 88 80 0 111 8 mS cm or with custom value Temperature Automatic or manual Compensation 9 9 to 120 0 C pH range 0 0 to 100 0 C EC range Temperature 0 00 to 10 00 C Coefficient EC default 1 90 C TDS Factor Selectable from 0 40 to 1 00 default value 0 50 pH electrode AD1131B EC probe AD76309 with built in temperature sensor Power supply 12 Vdc power adapter Dimensions 230 x 180 x 50 mm Weight 1 8 kg Environment 0 to 50 C RH max 95 non condensing FRONT AND REAR PANELS Front Panel 000 pH mV EC TDS amp Temperature Meter Rear Panel Ie x bb KD 8 Un BW Ne 10 11 12 13 14 15 16 Liquid Crystal Display LCD SETUP key to enter exit setup mode CFM key to confirm values CAL key to enter exit calibration mode Up arrow key to manually increase t2. The pH reading is affected by temperature In order to measure the pH accurately the temperature effect must be compensated for To use the ATC Automatic Temperature Compensa tion capability ofthe instrument connect the AD7662 temperature probe immerse it into the sample as close as possible to the pH electrode and wait for a few seconds If the solution temperature is known MTC Manual Temperature Compensation can be performed by dis connecting the temperature probe The display will show the de fault temperature of 25 C or the last temperature reading with the C tag blinking The temperature can be adjusted using the arrow keys from 9 9 C to 120 0 C e Sz 13 ORP mV MEASUREMENTS Oxidation Reduction Potential ORP measurements pro vide the quantification ofthe oxidizing orreducing power of the tested sample To correctly perform a redox measurement the surface of the ORP electrode must be clean and smooth Press RANGE to enter mV range Immerse the tip of the ORP electrode 4 cm into the sample to be tested and al low a few seconds for the reading to sta bilize 4 cm i The instrument displays the mV reading on the primary LCD and the tempera ture on the secondary LCD I mn VL 2 l rs xL om If the reading is out of a a a range the closest full scale Innes value will blink on the pri LI mary LCD 2 lag RELATIVE mV MEASUREMENTS T
3. Conductivity electrode 3 Reference y socket Power adapter aii Socket ul INSTRUMENT START UP Turn the instrument on by pressing the ON OFF button All LCD tags are displayed and a beep 1s generated while the instru ment performs a self test Auto GLPSETUPMTCATC ECTDS uz H nna CIC Zee cALDUECEM alfointCustom DATE TIME BBBOB Notes e The instrument starts in the same range and mode as it was at power off The RANGE key toggles between pH mV and EC ranges The SHIFT and MODE keys change the dis played information for the selected range 11 pH MEASUREMENTS Make sure the instrument has been calibrated before taking pH measurements Press RANGE to enter pH range Note To change pH resolution press and hold first SHIFT and then MODE key Immerse the electrode tip and the tem perature probe approximately 4 cm into the sample to be tested and stir gen tly Allow for the reading to stabilize The pH value is displayed on the pri mary LCD and the temperature on the secondary LCD ATC ATA bon LE Eb If the pH reading is out of tn IDESN range the closest full scale ALTUS value will blink on the pri P UU LW mary LCD e ur is If measurements are taken successively in different samples it is recommended to rinse the electrode thor oughly with deionized or tap water and then with some of the next sample
4. aur Calibration buffers in the order used for calibration together with the corresponding warnings 36 Notes The OLd message displayed beside a buffer value means that this buffer was not used dur ing last calibration Press SHIFT and then SETUP key to see the old calibration date or time if old calibration date is the same as the last procedure Each buffer is displayed with the resolution used during calibration The no bUF mes Em sage means that cali no bration was performed i LI at less than five points L ur Temperature compensation mode ATC or MTC with or without temperature probe GLP ni JILL EcE 37 pH resolution during calibration GLP VUL LALI Es Calibration time out alarm status The display shows OFF if the feature is disabled or the days remaining before the calibration alarm will be activated e g 5 days or after the calibration is expired e g 3 days GLP ne r GLP r LI M dH5 GAY WIZ car pue ALIS The instrument ID nn 38 LAST Relative mV CALIBRATION DATA Last relative mV calibration data are stored automatically after a successful calibration To view the relative mV calibration from the relative mV measurement mode press and hold SHIFT and then GLP key The instrument will display the time hh mm ofthe last calibration Use th
5. compensated for temperature effect automatically ATC using AD7662 temperature probe while the EC readings can be compensated auto matically ATC using the conductivity probe with built in temperature sensor or manually MTC It is also pos sible to disable the temperature compensation and mea sure the actual conductivity The temperature coefficient is user selectable The pH calibration can be performed at 1 2 or 3 points with five memorized buffers pH 4 01 6 86 7 01 9 18 10 01 In addition AD8000 is provided with calibration time out alarm GLP feature to view last calibration data and automatic HOLD feature to freeze the first stable read ing on the LCD This model is supplied complete with AD1131B refillable pH electrode with glass body BNC connector and 1 m cable AD76309 conductivity probe with built in tempera ture sensor and 1 m cable AD7662 stainless steel temperature probe 1 m cable pH 4 01 and pH 7 01 calibration buffers 20 ml sachet each e EC calibration solutions at 1413 uS cm and 12 88 mS cm 20 ml sachet each 12 Vdc power adapter User manual TECHNICAL DATA Range 2 00 to 16 00 pH 2 000 to 16 000 pH 699 9 mV 2000 mV 0 00 to 19 99 uS cm 0 00 to 9 99 ppm 20 0 to 199 9 uS cm 10 0 to 99 9 ppm 200 to 1999 uS cm 100 to 999 ppm 2 00 to 19 99 mS cm 1 00 to 9 99 ppt 20 0 to 199 9 mS cm 10 0 to 99 9 ppt 9 9 to 120 0 C pH range 0 0 to 100 0 C EC range
6. sleeve Tap the probe to remove air bubbles Out of range in the mV scale Dry membrane dry junction Soakin AD70300 stor age solution for at least one hour The meter does not accept the buffer solution for pH calibra tion Out oforder pH elec trode Follow the cleaning procedure If neces sary replace the electrode 54 The display pH reading out Recalibrate the meter shows blinking of range Make sure the sample 2 00 pH or is within the specified 16 00 pH pH range Check electrolyte level and electrode general state The display mV reading out Electrode not shows blinking of range connected 2000 mV The display EC or TDS read Recalibrate the meter shows blinking ing out of range Make sure the sample EC or TDS is within the specified reading range and the lock key was not pressed The meter does Broken temp Replace the tempera not work with probe ture probe temp probe The meter fails to Broken Replace the electrode calibrate or gives electrode faulty readings At start up all One key is Check the keyboard or LCD tags fixed blocked contact the vendor Err xx error mes Internal error Power the meter off sage displayed and on again If the er ror persists contact the vendor 25 ELECTRODES PROBES AND SOLUTIONS AD1131B Refillable pH electrode wit
7. OLD key again to return the normal mea surement mode 50 PROBE MAINTENANCE pH ELECTRODE PREPARATION Remove the electrode protective cap DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT This is normal with electrodes and they will disappear when rinsed with water During transport tiny bubbles of air may form inside the glass bulb affecting proper functioning of the electrode These bubbles can be removed by shaking down the electrode as you would do with a glass thermometer If the bulb and or junction is dry soak the electrode in AD70300 storage solution for at least one hour For refillable electrodes Ifthe filling solution electrolyte level is more than 2 5 cm below the fill hole add AD7082 electrolyte solution For faster response unscrew the fill hole screw during measurements pH ELECTRODE STORAGE To minimize clogging and assure a quick response time the glass bulb and the junction ofthe pH electrode should be kept moist and not allowed to dry out Replace the solution in the protective cap with a few I drops of AD70300 storage solution Note NEVER STORE THE ELECTRODE IN DIS TILLED OR DEIONIZED WATER PERIODIC MAINTENANCE Inspect the probe and cable The cable used for con nection to the instrument must be intact and there must be no points of broken insulation on the cable or cracks on the pH electrode stem or bulb Connectors must be perfectly clean and dry If any scratches or cracks are pres
8. USER MANUAL AR wa AD8000 pH mV EC TDS Temperature Bench Meter 2w4 HOLD RANGE SETU d MODE g cu AA AD8000 pH mV EC TDS amp Temperature Meter www adwainstruments com Dear Customer Thank you for choosing an Adwa product Please read carefully this manual before starting operations This instrument is in compliance with the EMC directive 2004 108 EC and its standards and Low Voltage Directive 2006 95 EC and its standards for electrical equipments For additional technical information please e mail us at sales adwainstruments com TABLE OF CONTENTS Introduction usd e lauka a OR RE er RE j Technical Data siss sessi kk e niens 6 Front and Rear Panels 00 00ee0e enter 8 Operational Guide retten 10 Z XM CIIM m 20 pH Calibration acie re rh ROT 21 Relative mV Calibration 0 0 en 28 EC Calibration iit iet 29 Good Laboratory Practice ssssssssse 34 siqui 44 Hold Functio isseire saa 50 Probe Maintenance essere 51 Troubleshooting Guide esses 54 Electrodes Probes and Solutions 56 INTRODUCTION AD8000 is a microprocessor based pH ORP con ductivity TDS and temperature bench meter Relative mV feature is also provided The autoranging feature of the EC and TDS ranges au tomatically sets the instrument to the scale with the highest resolution pH measurements are
9. ameters replace the old data of the corresponding buffer e To clear old calibration values press lock be fore exiting calibration 21 RELATIVE mV CALIBRATION Press CAL from the relative mV measurement mode Absolute mV value is displayed on the primary LCD and the AbS message on the secondary LCD When the absolute reading is stable the instrument asks for confirmation If the reading is out of range the WRONG tag will be displayed Press CFM to confirm the absolute value The instru ment will display 0 0 mV on the primary LCD and rEL message on the secondary LCD Now the rela tive mV offset is equal to the absolute mV reading Use the arrow keys to change the displayed relative mV value Press CFM to confirm the relative mV value The rela tive mV offset is displayed on the primary LCD and OFF message on the secondary LCD for a few sec onds The instrument returns to measurement mode Note The relative mV value can be changed only within the relative mV offset range 2000 mV 28 EC CALIBRATION STANDARD CALIBRATION EC calibration is a one point procedure Selectable cali bration points are 0 00 84 0 and 1413 p S cm 5 00 12 88 80 0 and 111 8 mS cm Rinse the probe with calibration solu tion or deionized water then immerse it into the solution The sleeve holes must be completely submerged Tap the probe repeatedly to remove any air bubbles that may be trapped ins
10. and date Range specific parameters are calibration time out alarm for the pH range cell constant TDS factor tem perature coefficient reference temperature and tem perature compensation for EC and TDS ranges To enter the SETUP mode press SETUP key from measurement mode The instrument will display the first parameter of the specific range Select the desired parameter using the arrow keys Press CAL to change parameter value The selected parameter will start blinking Press RANGE to toggle between displayed param eters Use the arrow keys to increase or decrease the dis played value 44 Press CFM to save the modified value or CAL to es cape without saving Use the arrow keys to select the next previous pa rameter SETTING COMMON PARAMETERS Instrument ID Press CAL when the instrument ID is displayed The instrument ID 0000 to 9999 will start blinking LS sw 7 AN 50 rae Ax uu In Ad Use the arrow keys to change the value Press CFM to save the new instrument ID value or CAL to escape without saving Current time Press CAL when the cur EY rent time is displayed The 350 LI hour will start blinking LLr t1 Use the arrow keys to ance change the hour 45 Press RANGE The minutes sw will start blinking d 3 fu a Use the arrow keys to L mi i change the minutes Press CFM to save the new value or CAL to escape w
11. e up arrow key to view all logged calibration pa rameter in the following sequence The date yyyy mm dd 39 The Relative mV calibration offset nn LLLI UF The instrument ID as in the pH GLP mode LAST EC CALIBRATION DATA Last EC calibration data are stored automatically after a successful calibration To view the EC calibration data from the EC measure ment mode press and hold SHIFT and then GLP key The instrument will display the time of last calibration Use the up arrow key to view all logged calibration pa rameters in the following sequence 40 The date LLLI I ung Used calibration solution standard Cell constant The instrument ID as in the pH GLP mode Calibration offset factor The temperature 42 Notes f NOTC is selected as temperature compensa tion mode during calibration the temperature co efficient 1s not displayed in GLP To return to measurement mode press and hold SHIFT and then GLP key at any moment f no calibration has been performed on the se lected range the no CAL message blinks on the display 43 SETUP Setup mode allows to view and modify the instrument parameters Depending on the selected range it is possible to view and or change specific range parameters and common parameters for all ranges Common parameters are instrument ID time
12. ed reference temperature 2 Manual MTC the temperature value can be manu ally set using the arrow keys The compensation is referenced to the selected reference temperature While in MTC mode the C tag blinks on the second ary LCD 3 No compensation NOTC the temperature is not taken into account The reading displayed on the pri mary LCD is the actual EC or TDS value Notes The default compensation mode is ATC Temperature compensation setting can be ac cessed by entering the setup menu and selecting the tcE item see Setup section for details If no temperature probe is detected ATC mode can not be selected and the instrument displays only dashes on the secondary LCD Ifthe temperature compensation is active mea surements are compensated using the tempera ture coefficient default value 1 90 C To change the temperature coefficient enter the setup mode and select the te item see Setup section for details If the temperature reading is out of the 0 0 to 100 0 C interval and the ATC option is selected the temperature full scale value will be displayed together with the C tag blinking No tempera ture compensation will be performed The reference temperature can be set from 15 to 30 C When the reference temperature is 17 changed the temperature coefficient must be manually adjusted by the user For example if o is the coefficient with refer ence t
13. emperature of 25 C if changing the tem perature to 20 C the new coefficient can be cal culated with the following formula B o 1 0 20 If o 1 90 C then B 2 10 C Always set reference temperature to 25 C when measuring TDS TDS MEASUREMENTS From EC range press and hold first SHIFT and then MODE key The instrument will switch to TDS mea suring range The TDS reading will be dis ar played on the primary LCD AJ t6 and the temperature reading on the secondary LCD p 48 e If the reading is out of Ne m range the full scale value H c H lt i e 99 9 ppt will blink on ATINS display eHB If lock was pressed to freeze the LCD range and the reading is out of range the full scale value of the frozen range will blink on LCD TEMPERATURE MEASUREMENTS To take the temperature measurements while the in strument is in pH or ORP range connect the AD7662 temperature probe to the appropriate socket on the rear panel Immerse the temperature probe into the sample and allow the reading to stabilize For EC and TDS ranges the AD76309 probe is pro vided with a built in temperature sensor Note If the instrument is in pH or ORP range and AD7662 temperature probe is not connected the C tag will blink manual compensation even if the EC probe is connected 19 AUTORANGING The EC and TDS scales are autoranging The meter automatically sets the scale with the highest possible re
14. ent replace the probe For pH electrodes rinse off any salt deposits with water For refillable electrodes Refill the electrode reference chamber with fresh AD7082 electrolyte solution Allow the electrode to stand upright for 1 hour Follow the storage procedure pH ELECTRODE CLEANING PROCEDURE Soak the electrode tip in deionized water for approxi mately 30 minutes IMPORTANT After performing a cleaning procedure rinse the electrode thoroughly with deionized water and soak it in AD70300 storage solution for at least 1 hour 52 before taking measurements EC PROBE MAINTENANCE After measurements rinse the probe with clean water If a more thorough cleaning is required remove the probe sleeve and clean the probe with a cloth or a nonabrasive detergent Make sure to reinsert the sleeve onto the probe properly L eo HNT and in the right direction After cleaning the probe recalibrate the instrument TROUBLESHOOTING GUIDE SYMPTOM PROBLEM SOLUTION Slow response Dirty pH electrode Soak the electrode excessive drift tip in deionized wa measuring pH ter for 30 minutes and then clean the electrode Reading Clogged dirty junc Clean the electrode fluctuate up and tion Low electro Refill with fresh so down noise lytelevel refillable lution refillable pH pH electrodes only electrodes only EC probe sleeve not Properly insert the properly inserted air bubbles inside sleeve
15. erature probe approxi mately 4 cm into the second buffer solution and stir gently The temperature probe should be close to the pH electrode f necessary use the arrow keys to select a different buffer value The hourglass symbol will blink on the LCD until the reading is stable When the reading is stable and close to the selected buffer the CFM tag will blink Press CFM to confirm The calibrated value will be displayed on the primary LCD and the third expected buffer value on the secondary LCD Note Theinstrument will automatically skip the buff ers used for the first and second calibration points After the second calibration point is confirmed im merse the pH electrode and the temperature probe approximately 4 cm into the third expected buffer and stir gently The temperature probe should be closed to the pH electrode If necessary use the arrow keys to select a different buffer value 24 The hourglass symbol will blink on the LCD until the reading is stable When the reading is stable and close to the selected buffer the CFM tag will blink Press CFM to confirm calibration The instrument stores the calibration values and re turns to normal measurement mode Notes e Ifthe measured value is not close to the selected buffer the WRONG and BUFFER tags will blink Check the buffer used or regenerate the electrode by following the pH electrode clean ing procedure descr
16. h glass body pro tection bottle BNC connector and 1 m cable AD1230B pH electrode with Epoxy body tip protection bottle BNC connector and 1 m cable AD3230B ORP electrode with Epoxy body tip pro tection bottle BNC connector and 1 m cable AD76309 Conductivity probe with built in tempera ture sensor DIN connector and 1 m cable AD7662 Stainless steel temperature probe with 1 m cable AD70004P pH4 01 buffer solution 20 ml sachet 25 pcs AD7004 pH 4 01 buffer solution 230 ml bottle AD70007P pH 7 01 buffer solution 20 ml sachet 25 pcs AD7007 pH 7 01 buffer solution 230 ml bottle AD70010P pH 10 01 buffer solution 20 ml sachet 25 pcs AD7010 pH 10 01 buffer solution 230 ml bottle AD70000P Electrode rinsing solution 20 ml sachet 25 pes AD7000 Electrode rinsing solution 230 ml bottle AD70031P 1413 uS cm solution 20 ml sachet 25 pcs AD7031 1413 uS cm solution 230 ml bottle 56 AD70030P 12 88 mS cm solution 20 ml sachet 25 pcs AD7030 12 88 mS cm EC standard solution 230 ml AD7033 84 uS cm EC standard solution 230 ml AD7034 80 00 mS cm EC standard solution 230 ml AD7035 111 80 mS cm EC standardsolution 230 ml AD7039 5000 uS cm EC standard solution 230 ml AD7082 Refilling solution 3 5M KCI 4x30 ml AD70300 Storage solution 230 ml bottle AD7061 Electrode cleaning solution 230 ml bottle 57 58 ADWA INSTRUMENTS Kft Als kik t sor 11 6726 Szeged Hungary Tel 36 62 317 878 Fax 36 62 550 610 e ma
17. he value of temperature or other parameters Down arrow key to manually decrease the value of temperature or other parameters SHIFT key to activate the key alternate function press and hold first the SHIFT key and then the second desired key lock key to freeze current EC range on the LCD or to clear pH calibration parameter RANGE MODE key to select measurement unit or switch the focused data and to select measure ment mode or pH resolution ON OFF key to turn the instrument ON and OFF HOLD GLP key to freeze the first stable reading on the LCD and to display GLP information Power supply socket Conductivity probe connector Reference input socket BNC connector for pH or ORP electrode Temperature probe socket OPERATIONAL GUIDE CONNECTIONS Plug the 12 Vdc adapter into the power supply socket Note Thisinstrument uses non volatile memory to re tain the calibration parameters and all other set tings even when unplugged For pH or ORP measurements connect the electrode to the BNC connector For electrodes with separate reference connect the reference electrode plug to the reference socket For temperature measurements and automatic tem perature compensation connect the temperature probe to the appropriate socket For EC and TDS measurements connect the probe to the 7 pin connector Tighten the threaded ring and make sure the probe sleeve is properly inserted BNC connector
18. ibed in the Probe mainte nance section If necessary change the buffer or the electrode Blinking WRONG amp BUFFER tags and Old message on the secondary LCD mean that inconsistency between new and previous old calibration is detected Clear calibration pa rameters by pressing lock and proceed with calibration the instrument will keep all confirmed values during the current calibration If lock is pressed before the first calibration point is accepted the instrument clears all cali 25 bration parameters and returns to measurement mode e Blinking WRONG tag and temperature value are displayed if the temperature reading is out of the defined temperature range for the buffer Calibration cannot be confirmed in this situation TWO POINT CALIBRATION Proceed as described in the Three point calibration section and press CAL after the second calibration point Is accepted The instrument will memorize the calibra tion data and return to normal measurement mode ONE POINT CALIBRATION Proceed as described in the Three point calibration section and press CAL after the first calibration point is accepted The instrument will memorize the calibration data and return to normal measurement mode 26 Notes During calibration press RANGE key to toggle be tween pH buffer and tem perature reading on the sec ondary LCD Each time a buffer is confirmed the new cali bration par
19. ide the sleeve To enter EC calibration select the EC range and press CAL key Note TDS readings are automatically derived from the EC readings and no specific calibration for TDS is needed Pressing CAL when TDS range is selected has no effect For zero calibration simply leave the dry probe in the air The CAL and BUFFER tags light up The primary LCD displays the not calibrated EC read ing while the secondary LCD shows one of the avail able standard values The hourglass symbol blinks 29 f necessary use the arrow keys to select the desired standard value E E When the reading is stable the CFM tag starts blink ing Press CFM to confirm calibration e The instrument displays the Stor and Good mes sages and returns to measurement mode 30 Notes If the temperature is out of range the IE WRONG BUFFER LI a did nn ns TEMP message jovi oon blinks on the LCD Gis Ifthe reading is too far from the expected value WRONG BUFFER blinks For best results choose a standard value for cali bration close to the sample to be measured During standard calibration the meter uses 1 90 C compensation coefficient If the setup item tc has been set to different value when exiting calibration mode the displayed valued on the upper LCD might be different from the nomi nal standard value CUSTOM CALIBRATION It is also possible to perfo
20. il sales adwainstruments com www adwainstruments com MANAD8000 09 14
21. ilable for calibration pH 4 01 6 86 7 01 9 18 and 10 01 For accurate measurements it is recommended to per form a three point calibration However at least a two point calibration is suggested Select pH range by pressing RANGE THREE POINT CALIBRATION Immerse pH electrode and tem perature probe approximately 4 cm into a buffer solution of your choice pH 4 01 6 86 7 01 9 18 0r 10 01 and stir gently The temperature probe should be close to the pH electrode Press CAL and the instrument will display the measured pH on the pri mary LCD and the 7 01 buffer on the secondary LCD together with CAL 1 and BUFFER tags AN l t KVA 22 If necessary use the up and down arrow keys to se lect a different buffer value The hourglass symbol will blink on the LCD until the reading is stable When the reading 1s stable and close to the selected buffer the CFM tag will blink Press CFM to confirm calibration The calibration value will be displayed on the primary LCD and the second expected buffer on the secondary LCD NU C ES r1 pH L4 BUFFER 2 ri lon Ld Note The instrument will automatically skip the buffer used for the first point It also skips 6 86 if 7 01 buffer was used and viceversa Likewise it will skip 9 18 if 10 01 buffer was used and viceversa 23 After the first calibration point is confirmed immerse the pH electrode and the temp
22. ithout saving Current date Press CAL when the current see Zy date is displayed The year JULI will start blinking ae FR NN Use the arrow keys to Wy change the year Press RANGE The month will start blinking Use the arrow keys to change the month Press RANGE The day will start blinking Use the arrow keys to change the day Press CFM to save the modified value or CAL to escape without saving 46 SETTING RANGE SPECIFIC PARAMETERS pH Range Calibration time out alarm Press CAL when the cali bration time out is displayed Calibration time out value OFF or 1 to 7 days will start blinking SETUP Ca M M dR5 Use the arrow keys to change the value Press CFM to save the new calibration time out value or CAL to escape without saving EC TDS Range Cell constant Press CAL when the cell constant is displayed The cell constant value will start blinking 7 MI IR CELL 1 I Use the arrow keys to change the cell constant 0 500 to 1 700 Press CFM to save the new cell constant value or CAL to escape without saving 47 TDS factor Press CAL when the TDS xm A A factor is displayed The SMe mn TDS factor starts blinking 2M l Ly Use the arrow keys to Luc change the TDS factor 0 40 to 1 00 Press CFM to save the modified value or CAL to escape without saving Temperature compensa
23. o enter relative mV mode from mV ORP range press and hold first SHIFT and then MODE key The relative mV reading will be displayed on the pri mary LCD and the current temperature value on the secondary LCD Note The displayed relative mV reading is the differ ence between the current mV input value and the relative mV offset established in the relative mV calibration CONDUCTIVITY MEASUREMENTS Enter the conductivity EC measurement range by pressing the RANGE key mmerse the probe into the solution to be tested The sleeve holes must be completely submerged Tap the probe repeatedly to remove any air bubble that may be trapped inside the sleeve 15 e Allow for the reading to sta acc bilize The primary LCD dis d plays the measurement in uL the selected range while the c uH temperature is displayedon p ine the secondary LCD 000 T If the reading is out of p wh range the full scale value CI lis i e 199 9 mS will blink M 5 If lock was pressed to freeze the LCD range and the reading is out of range the full scale value of the frozen range will blink The EC reading is affected by temperature Three op tions are available for temperature compensation 1 Automatic ATC the EC probe features a built in temperature sensor which provides the temperature reading to automatically compensate the EC and TDS measurements from 0 0 to 100 0 C also using the select
24. rm EC calibration with custom calibration solution Immerse the probe in the custom calibration solution and select the EC range 31 Press CAL to enter the EC calibra tion and then the RANGE key to en ter custom EC calibration mode The CAL BUFFER and Cal Point Custom tags light up The pri mary LCD displays the not calibrated temperature compensated EC read ing while the secondary LCD shows the tempera SRE ture compensated EC read ing factory calibrated with k 1 The hourglass symbol blinks Using the arrow keys adjust the EC reading on the primary LCD to the desired value The maximum adjustment is 40 around the sec ondary LCD reading ATCEC When the reading is stable LII the CFM tag starts blinking iby on the LCD Press CFM to n Su confirm calibration The instrument displays the Stor and Good mes sages and returns to measurement mode MZ cnt IN INS CAL CN ML 4 i 32 Notes Zero calibration is not allowed in custom mode The calibrated custom value is considered the value of the calibration solution at the selected reference temperature t is possible to set the cell constant value di rectly without following the calibration proce dure To set the cell constant enter the setup mode and select the CELL item see Setup section for details The temperature reading is not used during cu
25. s tom EC calibration 33 GOOD LABORATORY PRACTICE GLP s a set of functions that allow data storage and retrieval about the electrode status and maintenance All data regarding pH relative mV and EC calibrations are stored in the instrument memory CALIBRATION TIME OUT ALARM The instrument allows to set the number of days from 1 to 7 before the next required pH calibration The de fault setting is OFF disabled At start up the instrument checks ifthe calibration time out has expired If yes the CAL DUE message blinks to advise the user that a new calibration is required Note If the instrument was not calibrated or all cali bration data were cleared the CAL DUE message is displayed even if the feature is dis abled in the setup menu LAST pH CALIBRATION DATA The last pH calibration data are stored automatically after a successful calibration 34 To view the pH calibration data from pH measurement mode press SHIFT and then GLP key The instrument will display the date yyyy mm dd of last calibration anime Sut n Hug Use the up arrow key to view all calibration parameters in the following sequence Time hh mm of the last calibration CAL pH calibration offset value GLP BE 35 pH calibration slope the GLP slope is the average of the calibration slopes the percentage is referred to the ideal value of 59 16 mV pH innn LILLLI
26. solution By pressing the lock key the autor Su anging feature is disabled and the cur rent range is frozen on the LCD The Auto and Off autoranging disabled mes sages will be displayed on the LCD for a few sec onds To restore the autoranging option press lock key again The Auto and On autoranging enable messages will be displayed on the LCD for a few sec onds Note Autoranging is automatically restored if range is changed if setup or calibration mode is entered and if meter is turned off and back on again 20 pH CALIBRATION It is recommended to calibrate the instrument frequently especially if high accuracy is required The instrument should be recalibrated whenever the pH electrode is replaced atleast once a week after testing aggressive chemicals if CAL DUE tags are blinking during measurement Always use fresh buffers for calibration and clean the electrode before starting the procedure see Probe maintenance section PREPARATION Pour small quantities of the buffer solutions into clean beakers For accurate calibration and to minimize cross contami nation use two beakers for each buffer solution one for rinsing the electrode and one for calibration If measurement will be taken in the acidic range use pH 4 01 as second buffer while for alkaline environment use pH 10 01 or 9 18 as second buffer 21 PROCEDURE 5 memorized buffers are ava
27. tion coefficient Press CAL when the tem mm 7 7 perature compensation co gt On efficient is displayed The JL temperature compensation Pet j value will start blinking Use the arrow keys to change the coefficient 0 00 to 10 00 C Press CFM to save the new value or CAL to escape without saving 48 Reference temperature Press CAL when the ref ew VIT 7 erence temperature 1s dis a pug played The reference tem L LS perature value will start blinking Use the arrow keys to change the reference tempera ture value 15 to 30 C Press CFM to save the new value or CAL to escape without saving Temperature compensation mode Press CAL when the tem Fy s perature compensation 1s ni r displayed The temperature LL compensation mode will start blinking Use the arrow keys to change the temperature com pensation mode Atc Mtc or notc Press CFM to save the new setting or CAL to escape without saving 49 HOLD FUNCTION To freeze the first stable reading on the LCD press the HOLD key from measurement mode pH mV or EC range The Auto and H tags will blink on the LCD until the reading is stabilized ST Auto ATC E unb la LE cAI When the reading is stable the H tag stops blinking and Auto tag turns off The reading is frozen ATC H AO bn LI 53 Pi Press the H
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