30 • If necessary, use the arrow keys to select the desired
Contents
1. Se ion S k 1 The hourglass symbol bg y 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 mec When the reading is stable up m Me anand the CFM tag starts blinking on the LCD Press CFM to ANS on p confirm calibration e The instrument displays the Stor and Good mes sages and returns to measurement mode 32 EC CALIBRATION STANDARD CALIBRATION EC calibration is a one point procedure Selectable cali bration points are 0 00 84 0 and 1413 uS cm 5 00 12 88 80 0 and 111 8 mS cm e Rinse the probe with calibration solu tion or deionized water then immerse it into the solution The sleeve holes must be completely submerged e Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve e 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 e For zero calibration simply leave the dry probe in the air The CAL and BUFFER tags light up e 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 RELATIVE mV CALIBRATION e Press CAL from t2. 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 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 0 01 pH 0 002 pH 0 2 mV up to 699 9 mV 1 mV up to 2000 mV 1 f s EC TDS 0 5 C Relative mV offset range 2000 mV Accuracy 20 C The display shows blinking 2 00 pH or 16 00 pH The display shows blinking 2000 mV The display shows blinking EC or TDS reading The meter does not work with temp probe Err xx error mes sage displayed pH reading out Recalibrate the meter of range Make sure the sample is within the specified pH range Check electrolyte level and electrode general state mV reading out Electrode not of range connected EC or TDS read Recalibrate the meter ing out of range Make sure the sample is within the specified range and the lock key was not pressed Broken temp Replace the tempera probe ture 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 t
3. x g S55 e If necessary use the arrow keys to select the desired standard value E 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 e If the temperature is out of range the WRONG BUFFER TEMP message blinks on the LCD If the 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 Sy ee ona kel Crea ZINN SS 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 perform EC calibration with custom calibration solution e 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 Ss a LCD shows the tempera RS Tad H ture compensated EC read I ing factory calibrated with
4. 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 16 e Press CFM to save the modified value or CAL to es cape without saving e Use the arrow keys to select the next previous pa rameter SETTING COMMON PARAMETERS Instrument ID e Press CAL when the instrument ID is displayed The instrument ID 0000 to 9999 will start blinking COSL wI ZZ Bag l ie j e Use the arrow keys to change the value e Press CFM to save the new instrument ID value or CAL to escape without saving Current time e Press CAL when the cur N w 7 rent time is displayed The d 4 U hour will start blinking 7 4 e Use the arrow keys to Es change the hour 45 e Press RANGE The minutes mme VV RELATIVE mV MEASUREMENTS will start blinking d E y lt e To enter relative mV mode from mV ORP range e Use the arrow keys to i fe x press and hold first SHIFT and then MODE key change the minutes e The relative mV reading will be displayed on the pri e Press CFM to save the new value or CAL to escape mary LCD and the current temperature value on the without saving secondary LCD Current date fu 12 av e Press CAL when the current d date is displayed The year will start blinking e Use the arrow keys to change the year e Press
5. tags will blink Check the buffer used or regenerate the electrode by following the pH electrode clean ing procedure described 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 e After the first calibration point is confirmed immerse the pH electrode and the temperature probe approxi mately 4 cm into the second buffer solution and stir gently The temperature probe should be close to the pH electrode If necessary use the arrow keys to select a different buffer value e The hourglass symbol will blink on the LCD until the reading is stable e When the reading is stable and close to the selected buffer the CFM tag will blink e 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 The instrument will automatically skip the buff ers used for the first and second calibration points e After the second calibration point is confirmed im merse the pH electrode a
6. RANGE The month will start blinking e Use the arrow keys to change the month e Press RANGE The day will start blinking e Use the arrow keys to 246 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 e Enter the conductivity EC measurement range by pressing the RANGE key e Immerse the probe into the solution to be tested The sleeve holes must be change the day completely submerged e Press CFM to save the modified value or CAL to e Tap the probe repeatedly to remove any escape without saving air bubble that may be trapped inside l the sleeve 46 15 ORP mV MEASUREMENTS Oxidation Reduction Potential ORP measurements pro vide the quantification of the oxidizing or reducing power of the tested sample To correctly perform a redox measurement the surface of the ORP electrode must be clean and smooth e Press RANGE to enter mV range e 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 The instrument displays the mV reading on the primary LCD and the tempera ture on the secondary LCD AUS PHE 1 an je e If the reading is out of E EE range the closest full scale Ssnnn value will blink on the pri DHHS mary LCD SC Es 14 SETTING RANGE SPECIFIC PAR
7. dirty junc fluctuate up and tion Low electro down noise lyte level refillable pHelectrodes only EC probe sleeve not properly inserted air bubbles inside sleeve Out of range in Dry membrane dry the mV scale junction The meter does Out of order pH elec not accept the trode buffer solution for pH calibra tion 54 Soak the electrode tip in deionized wa ter for 30 minutes and then clean the electrode Clean the electrode Refill with fresh so lution refillable pH electrodes only Properly insert the sleeve Tap the probe to remove air bubbles Soak in A7071S elec trolyte solution for at least one hour Follow the cleaning procedure If neces sary replace the electrode 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 Slope at 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 A1131B EC probe A76309 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 7 TECHNICAL DATA
8. of the last i J Use the up arrow key to view all logged calibration pa rameter in the following sequence e The date yyyy mm dd _ cod 409 39 e The Relative mV calibration offset nn av LILI UFS e 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 907 Use the up arrow key to view all logged calibration pa rameters in the following sequence 40 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 e at least once a week e after testing aggressive chemicals e 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 environm
9. 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 of the pH electrode should be kept moist and not allowed to dry out Replace the solution in the protective cap with a few 51 drops of A7071S electrolyte 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 present replace the probe For pH electrodes rinse off any salt deposits with water For refillable electrodes Refill the electrode reference chamber with fresh A7071S 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 A7071S electrolyte solution for at least 1 hour 52 ARNE CH 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 calibrat
10. AMETERS pH Range Calibration time out alarm e Press CAL when the cali are bration time out is displayed ri F E Calibration time out value U OFF or 1 to 7 days will start blinking dii e Use the arrow keys to change the value e Press CFM to save the new calibration time out value or CAL to escape without saving EC TDS Range Cell constant SE e Press CAL when the cell n n p constant is displayed The e cell constant value will start Ge I EEIM DA blinking CELL e Use the arrow keys to change the cell constant 0 500 to 1 700 e Press CFM to save the new cell constant value or CAL to escape without saving 47 TDS factor e Press CAL when the TDS wa LIZ 7 kW factor is displayed The Agee TDS factor starts blinking 5 e Use the arrow keys to ET change the TDS factor 0 40 to 1 00 e Press CFM to save the modified value or CAL to escape without saving Temperature compensation coefficient e Press CAL when the tem j awe A 7 perature compensation co gn efficient is displayed The temperature compensation e H value will start blinking d e Use the arrow keys to change the coefficient 0 00 to 10 00 PC e Press CFM to save the new value or CAL to escape without saving 48 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 th
11. L 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 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 _ cua 403 Use the up arrow key to view all calibration parameters in the following sequence e Time hh mm of the last calibration mm 4 sl e pH calibration offset value Le 3 EN GFS 35 e 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 000 SLP e Calibration buffers in the order used for calibration together with the corresponding warnings e The hourglass symbol will blink on the LCD until the reading is stable e When the reading is stable and close to the selected buffer the CFM tag will blink e Press CFM to confirm calibration e The instrument stores the calibration values and re turns to normal measurement mode Notes e If the measured value is not close to the selected buffer the WRONG and BUFFER
12. ayed information for the selected range 11 OPERATIONAL GUIDE CONNECTIONS e Plug the 12 Vdc adapter into the power supply socket Note This instrument uses non volatile memory to re tain the calibration parameters and all other set tings even when unplugged e 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 e For temperature measurements and automatic tem perature compensation connect the temperature probe to the appropriate socket e 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 z INO cosmester Conductivity toe slecieads oa iJ 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 A707185 electrolyte solution for at least one hour For refillable electrodes If the filling solution electrolyte level is more than 2 5 cm below the fill hole add A7071S electrolyte
13. d then GLP key at any moment e If 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 e Common parameters are instrument ID time and date e 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 e To enter the SETUP mode press SETUP key from measurement mode The instrument will display the first parameter of the specific range e Select the desired parameter using the arrow keys e Press CAL to change parameter value The selected parameter will start blinking e Press RANGE to toggle between displayed param eters e Use the arrow keys to increase or decrease the dis played value 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 e The default compensation mode is ATC e 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 d
14. e 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 compensated for temperature effect automatically ATC using A7662 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 tion for refillable electrodes 30 ml bottle WARRANTY Adwa warrants this product to be free of defects in material and workmanship as stated in the operating manual If repair or adjustment is necessary and has not been the result of abuse misuse or improper handling within the warranty pe riod please contact your dealer or the nearest Adwa Office for the RGA Return Goods Authorization number to put on the outside of your package Warranted service will be made with out charge The meter is warranted for a period of 2 years while probes are warranted for 6 months The warranty pe
15. e next sample 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 of the instrument connect the A7662 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 we fault temperature of 25 C or Hu m the last temperature reading w with the C tag blinking dUET The temperature can be adjusted using the arrow keys from 9 9 C to 120 0 C Eo amp 13 pH MEASUREMENTS Make sure the instrument has been calibrated before taking pH measurements e Press RANGE to enter pH range Note To change pH resolution press and hold first SHIFT and then MODE key e 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 mi sy 245 e If the pH reading is out of An 7 range the closest full scale l A oo value will blink on the pri HUH mary LCD PUB 12 Reference temperature e Press CAL when the ref ame 7 7 Bn a a e
16. ent use pH 10 01 or 9 18 as second buffer 21 AUTORANGING The EC and TDS scales are autoranging The meter automatically sets the scale with the highest possible resolution e By pressing the lock key the autor 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 e 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 e The date opp HUH Used calibration solution standard AE Used calibration solution custom e Cell constant BUF _ B95 CELL 41 Calibration offset factor r BOD GFS e Reference temperature e The temperature e The temperature e The instrument ID as in the pH GLP mode kV Ca rEF coefficient Q Xu Ec AJ EE mode _ Ate EcE a 42 e 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 e To take the temperature measurements while the
17. he relative mV measurement mode Absolute mV BE 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 TEL 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 Notes e 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 e It 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 e The temperature reading is not used during cus tom EC calibration 33 GOOD LABORATORY PRACTICE GLP is a set of functions that allow data storage and retrieval about the electrode
18. he vendor Internal error Power the meter off and on again If the er ror persists contact the vendor 55 ELECTRODES PROBES AND SOLUTIONS A1131B A1230B A3230B A76309 A7662 A70004P A70007P A70010P A70031P A70030P Refillable pH electrode with glass body tip protection bottle BNC connector and 1 m cable pH electrode with Epoxy body tip pro tection bottle BNC connector and 1 m cable ORP electrode with Epoxy body tip protection bottle BNC connector and 1 m cable Conductivity probe with built in tem perature sensor DIN connector and 1 m cable Stainless steel temperature probe with 1 m cable pH 4 01 buffer 20 ml sachet 25 pcs pH 7 01 buffer 20 ml sachet 25 pcs pH 10 01 buffer 20 ml sachet 25 pcs 1413 uS cm solution 20 ml sachet 25 pes 12 88 mS cm solution 20 ml sachet 25 DCS 56 This model is supplied complete with e A1131B refillable pH electrode with glass body BNC connector and 1 m cable e A76309 conductivity probe with built in tempera ture sensor and 1 m cable e A7662 stainless steel temperature probe 1 m cable e 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 e Probe holder e 12 Vdc power adapter e User manual INTRODUCTION AD8000 is a microprocessor based pH ORP con A7071S 3 5 M KCI AgCI electrolyte solu ductivity TDS and temperature bench meter Relativ
19. in strument is in pH or ORP range connect the A7662 temperature probe to the appropriate socket on the rear panel Immerse the temperature probe into the sample and allow the reading to stabilize e For EC and TDS ranges the A76309 probe is pro vided with a built in temperature sensor Note If the instrument is in pH or ORP range and A7662 temperature probe is not connected the C tag will blink manual compensation even if the EC probe is connected 19 changed the temperature coefficient must be manually adjusted by the user For example if s the coefficient with refer ence temperature of 25 C if changing the tem perature to 20 C the new coefficient can be cal culated with the following formula 1 20 If 1 90 C then 2 10 C e Always set reference temperature to 25 C when measuring TDS TDS MEASUREMENTS e 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 V played on the primary LCD 45 l and the temperature reading on the secondary LCD cB e If the reading is out of f KAAFEN range the full scale value H gg a ic 99 9 ppt will blink on EE ee display 24B 18 Notes e If NOTC is selected as temperature compensa tion mode during calibration the temperature co efficient is not displayed in GLP To return to measurement mode press and hold SHIFT an
20. ion mode Up arrow key to manually increase the 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 FRONT AND REAR PANELS Front Panel m7r LE IL Tan porilor New Rear Panel 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 O oe P SCH ES ee fen and in the right direction After cleaning the probe recalibrate the instrument 53 TROUBLESHOOTING GUIDE SYMPTOM PROBLEM SOLUTION Slow response Dirty pH electrode excessive drift measuring pH Reading Clogged
21. isplays only dashes on the secondary LCD If the 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 tc 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 e The reference temperature can be set from 15 to 30 C When the reference temperature is 17 r e Allow for the reading to sta ACEC bilize The primary LCD dis d 4 plays the measurement in the selected range while the d 4B s temperature is displayed on x SC the secondary LCD N lt e If the reading is out of 1999 range the full scale value 1 aug i e 199 9 mS will blink J e 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 selected reference temperature
22. nd the temperature probe approximately 4 cm into the third expected buffer and stir gently The temperature probe should be closed to the pH electrode e If necessary use the arrow keys to select a different buffer value 24 Notes e 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 e Each buffer is displayed with the resolution used during calibration e The no bUF mes f sage means that cali bration was performed n D at less than five points 2i b D E e Temperature compensation mode ATC or MTC with or without temperature probe i Atc EcE 37 e pH resolution during calibration nN LIL rES e 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 BIL AS d dAY WIZ AY e The instrument ID e nn LU d 4 in id DAI 38 e If necessary use the up and down arrow keys to se lect a different buffer value e The hourglass symbol will blink on the LCD until the reading is stable e When the reading is stable and close to the selected buffer the CFM tag will blink e Press CFM
23. rence temperature is dis SEH eo a played The reference tem a Un perature value will start blinking e Use the arrow keys to change the reference tempera ture value 15 to 30 C e Press CFM to save the new value or CAL to escape without saving Temperature compensation mode e Press CAL when the tem AES perature compensation is displayed The temperature compensation mode will start blinking e Use the arrow keys to change the temperature com pensation mode Atc Mtc or notc e 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 NW one wt Ch When the reading is stable the H tag stops blinking and Auto tag turns off The reading is frozen a WM ty Li cbs Press the HOLD key again to return the normal mea surement mode 50 INSTRUMENT START UP e Turn the instrument on by pressing the ON OFF button e All LCD tags are displayed and a beep is generated while the instru ment performs a self test KEE HBH8 s Notes e The instrument starts in the same range and mode as it was at power off e The RANGE key toggles between pH mV and EC ranges e The SHIFT and MODE keys change the dis pl
24. riod commences from the original date of sale Warranty is only valid when the product is used under normal conditions and in accordance with the instruction manual The warranty is void if the instrument is repaired or serviced by unautho rized personnel not used in accordance to the instructions or if non Adwa accessories such as buffer solutions probes etc are used in conjunction with the meter Adwa will not be held responsible for any accident whether directly or indi rectly caused by the use of this instrument 58 TABLE OF CONTENTS ie rte le EE 4 Technical Data sroine n a 6 Front and Rear Dance 8 Operational Guide 10 ANULOTAN SING eege get sessdeasva tens EEEE 20 PH Calibration soi e aeaiia i 21 Relative mV Calibration cccccccccecesececeeeeeees 28 EC Calibration csccsssicescxtsaceseszaaces tni rnini 29 Good Laboratory Practice ccc eeeeeeseeneeeeeees 34 et scicdesietesecssansct saree ATEA TA 44 Hold Funct Oh store det aeaaeae snan entas 50 Probe Maintenance cccccecccccecececececeeeeeeeeeees 51 Troubleshooting Guide sscceccceceeeesestnneeeeeees 54 Electrodes Probes and Solutions cccccceee 56 Watt Ed ite at 58 3 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 89 336 EEC and Low Voltage Directive 73 23 EEC for electrical eq
25. 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 if the 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 Notes e During calibration press RANGE key to toggle be tween pH buffer and tem perature reading on the sec ondary LCD e Each time a buffer is confirmed the new cali bration parameters replace the old data of the corresponding buffer e To clear old calibration values press lock be fore exiting calibration 27 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 CA
26. to confirm calibration tae WA Au gem 20 le The calibration value will be displayed on the primary LCD and the second expected buffer on the secondary LCD WY e x It UI i ec 2 45 i 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 PROCEDURE 5 memorized buffers are available 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 e 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 or 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 Me Br 22 7 Co kee 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
27. uipments For additional technical information please e mail us at sales adwainstruments com USER MANUAL Ai wa AD8000 pH mV EC TDS Temperature Bench Meter Als6 kik6t6 sor 11 6726 Szeged Hungary Se Tel 36 62 317 878 Fax 36 62 550 610 e mail sales adwainstruments com www adwainstruments com ADWA INSTRUMENTS Kft AGz000 pH nV EG TOS amp Temaer Vel MANAD8000R3_ 05 09 www adwainstruments com
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