AD 131 and AD 132 pH/mV/Temperature Waterproof Meters USER
Contents
1. 000 000 25 Good Laboratory Practice GLP 00 eee 26 SEUD sserdecessnecardeneraisseedlattoed Muse tienen mannan 31 Lo g on demiaind sita snar gaur ann Ea EEEE 34 Hold Functii assa a ra askana asnar 39 Printing AD132 Only 40 Battery Replacement 00000 eee 4 Temperature Calibration for technical personnel only 45 mV Calibration for technical personnel only 47 PC Interface AD132 Only 49 pH Electrode Conditioning amp Maintenance 50 Troubleshooting Guide ccccccecsceseeeseeeeeeeeseeesees 52 Electrodes Probes and Solutions 54 INTRODUCTION AD131 and AD132 are heavy duty portable waterproof meters for pH ORP Oxidation Reduction Potential and temperature measurements designed to provide laboratory results and accuracy even under harsh industrial conditions Main features include 7 memorized buffers for pH calibration pH 1 68 4 01 6 86 7 01 9 18 10 01 and 12 45 Messages on the LCD to make the calibration easy and accurate pH readings with manual or automatic temperature compensation Calibration time out alarm Log on demand HOLD feature to freeze stable reading on the LCD GLP feature to view last calibration data for pH and relative mV PC interface AD132 only SYMPTOMS PROBLEM SOLUTION The meter does Out of order Replace the probe not work with temperature probe temperature probe The meter fails to Broken or o2. To view the relative mV calibration data from normal relative mV measurement mode press SHIFT and then GLP key The instrument will display the date yyyy mm dd of the last calibration Use the up arrow key to view all logged calibration parameters in the following sequence e Last calibration date and time e Relative mV calibration offset e Instrument ID as in pH GLP mode Press SHIFT and then GLP key at any moment to return to normal measurement mode 30 Note If the instrument was not calibrated or all calibration data were cleared the CAL DUE message is displayed even if the feature is disabled in the setup menu LAST pH CALIBRATION DATA The last pH calibration data are stored automatically after a successful calibration 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 Use the up arrow key to view all calibration parameters in the following sequence e The time hh mm of the vee last calibration _ A _t LE I CAL TIME 27 e The pH calibration offset ae LI offset e pH calibration slope the GLP slope is the average of the calibration slopes stop the percentage is referred to the ideal value of 59 16 GLP EG Pan andl man Pan mal DJ en ml x mV pH e Calibration buffers in the order used for calibration together with the c
3. mV CALIBRATION for technical personnel only The instruments are factory calibrated for mV range Adwa s ORP electrodes are interchangeable and no mV calibration is needed when they are replaced If measurements are not accurate a mV recalibration should be performed For an accurate recalibration contact your dealer or the nearest Adwa Customer Service Center or follow the instructions below A two or three point procedure can be performed at 0 0 600 0 and 1800 mV 47 e Immerse the temperature probe into the vessel with ice and water as close as possible to the reference thermometer Allow a few seconds for probe thermal stabilization Use the arrow keys to set the reading on the secondary LCD to that measured by the reference thermometer a When the reading is stable and close to the selected calibration point the CFM tag starts blinking Press CFM to confirm The secondary LCD will display 50 0 C or 122 0 F Immerse the temperature probe into the second vessel as close as possible to the reference thermometer Allow a few seconds for probe thermal stabilization Use the arrow keys to set the reading on the secondary LCD to that of the hot water measured by the reference thermometer When the reading is stable and close to the selected calibration point the CFM tag starts blinking 46 INSTRUMENT START UP e Turn the instrument on by pressing ON OFF e At start up the display shows all the
4. RH max 100 non condensing Power Supply 4x 1 5 V AA alkaline battery Battery Life Approx 300 hours of continuous use Auto off User selectable 5 minutes or disabled Dimensions 188 x 96 x 70 mm Weight 460 g FRONT AND TOP PANELS conditions or contact your dealer if calibration can not be performed e To return to normal measurement mode press CAL at any moment during calibration If the calibration procedure is ended after the 600 0 mV point is confirmed the meter returns to normal measurement mode and stores a 2 point calibration data PC INTERFACE AD132 onl Data can be transferred from the instrument to the PC using the ADSW10 Windows compatible software optional ADSW10 also offers graphing and on line help feature Data can be exported to the most popular spreadsheet programs for further analysis To connect your instrument to a PC use the AD9551 optional Adwa cable Make sure that the instrument is switched off and plug the cable to the instrument RS232 socket and to a serial port of your PC If not using the AD9551 cable communication between instrument and PC may be not possible due to different RS232 connector configuration 8 49 Attach a mV simulator with an accuracy of 0 1 mV to the BNC connector on the rear panel With the instrument off press and hold the CFM amp STORE keys then power on the instrument The CAL tag ligh
5. tag blinks or WRONG for buffer not recognized Press the CFM key to confirm calibration The calibrated value is then displayed on the primary LCD and the secondary LCD shows the fifth expected buffer value 21 e After the fourth calibration point is confirmed immerse the pH electrode and the temperature probe approximately 4 cm into the third 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 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 blinks or WRONG for buffer not recognized Press the CFM key to confirm calibration The instrument stores the calibration values and returns to normal measurement mode FOUR THREE or TWO POINT CALIBRATION Proceed as described in the Five point calibration section and press CAL after the appropriate accepted calibration point The instrument will memorize the calibration data and return to normal measurement mode If there are less than 6 memory locations left the record number and the Lo message will blink for a few seconds to alert the user and then the number of free locations is displayed LOG If the logging space is full the FULL LOC message will be displayed for a few seconds together with the LOG tag blinkin
6. hh mm 00 00 to 23 59 00 00 Printer status ON OFF OFF AD132 only bAUd Baud rate 600 1200 2400 2400 AD132 only 4800 9600 PrEF Command prefix 0 to 47 16 AD132 only AOFF Auto off no or 5 minutes no In Id Instrument ID 0000 to 9999 0000 33 e If another item has to be a 7 set e g minutes press MATT Pa RANGE or left right 1 it arrow key and the item SE me i will start blinking j EA e Use the arrow keys to scroll the available values e Press CFM to confirm or CAL to escape e Use the arrow keys to select the next previous parameter 32 RELATIVE mV CALIBRATION e To enter relative mV calibration mode press CAL from relative mV measurement mode The relative mV is displayed on the primary LCD and the absolute mV value on the secondary LCD Use the arrow keys to change the displayed relative mV value When the reading is stable and the relative mV offset is inside the offset window 200 0 mV the CFM tag will be displayed Press CFM to confirm relative mV calibration and the instrument will return to normal measurement mode Ifthe absolute mV reading is out of range or the relative mV offset is out of the offset window the WRONG tag will blink Change the input value or the relative mV offset to complete the calibration procedure 25 GOOD LABORATORY PRACTICE GLP GLP is a set of functions that allows data storage and retrieval about the electrode status and maintenanc
7. in modifying mode SET exit SETUP RANGE select parameter See also items Help printings PRINTING AD132 only When connected to an external serial printer a complete set of information can be printed Printer specifications e at least 16 characters line e baud rate 9600 e 9 pin RS232 input Data can be printed on demand from measurement GLP and SETUP modes by pressing SHIFT and then PRINT Note Tocancel printing press SHIFT and then PRINT again While in pH measurement mode Date 2004 01 01 Time 02 25 17 the printout provides the following px a Ox information mv 23 2 2c 26 3 When in GLP mode the printout provide the following information PROCEDURE The meter allows to choose among 7 memorized buffer values pH 1 68 4 01 6 86 7 01 9 18 10 01 and 12 45 For accurate measurements it is recommended to perform a five point procedure However at least a two point calibration is suggested The instrument will automatically skip the buffers already used and require a minimum difference of 0 2 pH unit between two buffers used for calibration A new calibration will override existing stored calibration data The slopes adjacent to the calibration points will be reevaluated If the new calibration point has no correspondence in the existing stored calibration data it is simply added or the instrument will ask which buffer will be replaced by the current one If at least a two point c
8. parameters the meter displays the dEL message together with the lot number Note Pressing SHIFT and then SETUP key the instrument toggles between record number and del ALL 37 VIEWING LOGGED DATA To retrieve the information stored press SHIFT and then MRCL from measurement mode If no data were logged the no rEC message blinks on the LCD LoG Al i a N hkz r a AS ra Otherwise the instrument displays the memorized pH or relative mV reading and the lot number LOG m tg ti ct D et D A E n Pressing SHIFT and then SETUP key while in memory recall mode the secondary LCD will toggle between the lot and the record number Use the arrow keys to select a different lot or record 36 not recognized Press the CFM key to confirm calibration The calibrated value is then displayed on the primary LCD and the secondary LCD shows the fourth expected buffer value After the third calibration point is confirmed immerse the pH electrode and the temperature probe approximately 4 cm into the third 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 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
9. range without leaving the HOLD mode The STORE key also holds HOLD mode Pressing SHIFT and then SETUP GLP or MRCL key the instrument leaves the HOLD mode and performs the selected function 39 e Press SHIFT and then CLEAR to delete the selected record or all records Note Positions remain free in the log on demand lot by deleting the last logged sample or all lot e If the dEL All option was selected all logged data are deleted and the instrument returns to normal measurement mode r LOG LI L Om rc L e Press SHIFT and MRCL at any time to return to measurement mode 38 e 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 blinks Press the CFM key to confirm calibration The calibrated value is then displayed on the primary LCD and the secondary LCD shows the second expected buffer value together with the CAL and Cal Point 2 tags CAL Cal Point Lim fo Note Ifthe buffer is not recognized the WRONG message blinks to advise the user Change buffer and proceed e After the first calibration point is confirmed immerse the pH electrode and the temperature probe approximately 4 cm into the second buffer solution and stir gently The temperature probe should be close to the pH electrode 19 If necessary use the arrow keys to select a different b
10. 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 indirectly caused by the use of this instrument 2 55 ELECTRODES PROBES AND SOLUTIONS AD1230B pH electrode with Epoxy body tip protection bottle BNC connector with protection sleeve and 1 m cable AD3230B ORP electrode with Epoxy body tip protection bottle BNC connector with protection sleeve 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 pes AD7010 pH 10 01 buffer solution 230 ml bottle AD7061 Electrode cleaning solution 230 ml bottle AD70300 Electrode storage solution 230 ml bottle AD70000P Electrode rinsing solution 20 ml sachet 25 pes AD7000 Electrode rinsing solution 230 ml bottle AD9551 Serial communication cable 5 to 9 pins 54 TABLE OF CONTENTS IntrodUctiON a ar dagan akri aged adres edie en aes 4 Technical Data sucrase 6 Front and Top Panels 0 ceecceseeseseeeseeeeeseeeeeereeaes 8 Operational Guide siessen tes si sa 10 PH Calibration iss si a ss ask unn ns kana a i lina h s Dana 16 Relative mV Calibration
11. used segments for a few seconds or while the button is held followed by date and time then enters the measurement mode AutoLOG GLPSETUPMTC ATC Z t aie amp O00 Cal Point CALDUECFM 23 pH MEASUREMENTS Make sure the instrument has been calibrated before taking pH measurements Ifnecessary press RANGE to enter the pH mode e Remove the electrode tip protection bottle Submerge the pH electrode tip 4 cm and the temperature probe into the sample to be tested e Allow a few seconds for the electrode to stabilize 11 The pH reading is displayed on the primary LCD and the temperature on the secondary LCD If measurements are taken successively in different samples it is recommended to rinse the electrode thoroughly with deionized or tap water Then to condition the electrode rinse it with some of the next sample to be measured before immersing it into the solution Since the pH reading is affected by temperature in order to measure the pH accurately the meter is provided with temperature compensation feature To use the automatic temperature compensation ATC feature connect and immerse the AD7662 temperature probe into the sample as close as possible to the electrode and wait for a few seconds 12 TEMPERATURE CALIBRATION for technical personnel only The instruments are factory calibrated for temperature Adwa s temperature probes are interchangeable and no temperature
12. J 1 5VAA EVAR Oo N Note When batteries are removed the meter can remember date amp time for about 1 minute After that it will be necessary to set again date amp time through the setup procedure 44 If the temperature of the sample is known manual temperature compensation MTC can be performed Disconnect the temperature probe and the display will show the default temperature of 25 C 77 F or the last temperature reading with the C or F tag blinking e The temperature value can be adjusted using the arrow keys ORP mV MEASUREMENTS Oxidation reduction potential REDOX measurements provide the quantification of the oxidizing or reducing power of the tested sample To correct perform a redox measurement the surface of the ORP electrode must be clean and smooth e Press RANGE to enter the mV mode Immerse the tip of the ORP electrode at least 4 cm into the solution to be tested and wait a few seconds for the reading to stabilize 4cm lt The instrument displays the mV reading on the primary LCD and the temperature on the secondary LCD 13 e If the reading is out of range the closest full scale value will be displayed blinking on the primary LCD RELATIVE mV MEASUREMENTS To enter the relative mV mode press the RANGE key The relative mV reading will be displayed on the primary LCD and the current temperature value on the secondary LCD The relative mV
13. USER MANUAL A wA AD 131 and AD 132 pH mV Temperature Waterproof Meters ADWA HUNGARY Kft ee Alsokik6t6 sor 11 6726 Szeged Hungary Tel 36 62 317 878 Fax 36 62 550610 www adwainstruments com Manapis Goid www adwainstruments com 56 1 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 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 period 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 without charge The meter is warranted for a period of 2 years while probes are warranted for 6 months The warranty period 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 unauthorized personnel not used in accordance to
14. alibration has been performed and an offset correction of the electrode is desired keeping unchanged the existing slopes perform a one point calibration selecting the OFFS option in the setup menu If the Pnt option is selected the slopes adjacent to the calibration points will be reevaluated 17 FIVE POINT CALIBRATION e Immerse the pH electrode and the temperature probe approximately 4 cm into the first buffer solution pH 1 68 4 01 6 86 7 01 10 01 or 12 45 and stir gently The temperature probe should be close to the pH electrode e To enter the pH calibration mode press CAL from pH measurement mode The instrument will display the measured pH on the primary LCD and the 7 01 pH buffer on the secondary LCD together with CAL and Cal Point 1 tags Wy ae al ZRS 1 I pH LIL ri tl CAL oa Point lon ER If necessary use the arrow keys to select a different buffer value e 18 HOLD FUNCTION To freeze a stable reading on the LCD press HOLD key from normal measurement mode The Auto and H tags will blink on the LCD until the reading stabilizes Auto ATC NN a PH om 370 cin When the reading is stable the Auto and H tags stop blinking and the reading is frozen Press HOLD key again to return the normal measurement mode Note Pressing RANGE the instrument will skip to the displayed
15. at is measured 15 pH CALIBRATION The instrument should be recalibrated e Whenever the pH electrode is replaced e At least once a week e After testing aggressive chemicals e Ifthe CAL DUE message blinks during measurement PREPARATION Pour small quantities of the buffer solutions into clean beakers If possible use plastic beakers to minimize any EMC interferences For accurate calibration use two beakers for each buffer solution the first one for rinsing the electrode and the second for calibration If you are measuring in the acidic range use pH 4 01 or 1 68 as second buffer If you are measuring in the alkaline range use 10 01 9 18 or 12 45 as second buffer For extended range measurements acidic and alkaline perform a five point calibration by selecting five of the available buffers 16 e For pH range GLP pH Instr ID 0003 Date 2004 01 01 Time 01 04 32 Cal Time Out OFF Offset 22 9mV Slope 100 0 Cal Buffers pH 7 01 e For relative mV range e Setup mode if SHIFT and PRINT are the first keys pressed after entering the setup mode a setup table of contents will be printed 41 GLP Rel mv Instr ID 0003 Date 2004 01 01 Time 02 27 35 Off Relmv 23 3 INSTRUMENT SETUP Calibration Alarm Time Out One point cal behavior Temperature unit Current Date Current Time Printer ON OFF AutoOff 5 NO Baud rate Command prefix Instrument ID CAL enter
16. atches or cracks are present replace the electrode Rinse off any salt deposits with water CLEANING PROCEDURE Soak in AD7061 general cleaning solution for approximately 30 minutes IMPORTANT After performing any of the cleaning procedures rinse the electrode thoroughly with AD7000 refill the reference chamber with fresh electrolyte and soak the electrode in AD70300 storage solution for at least 1 hour before taking measurements 51 pH ELECTRODE CONDITIONING amp MAINTENANCE PREPARATION PROCEDURE Remove the pH 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 are dry soak the electrode in AD70300 storage solution for at least one hour STORAGE PROCEDURE 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 drops of AD70300 storage solution NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER 50 PC Interface AD132 only RS232 port Input Impedance 10 Ohm Environment 0 to 50 C 32 to 122 F
17. brane Soak in AD70300 the mV scale junction storage solution for 1h 52 e Connection to an external serial printer AD132 only with the following specification e at least 16 characters line e baud rate 9600 e 9 pin RS232 input Both models are supplied complete with e AD1230B pH electrode with double ceramic junction BNC connector and 1 m cable e AD7662 stainless steel temperature probe 1 m cable e 1 5V AA alkaline batteries 4 pcs e User manual TECHNICAL DATA Range 2 00 to 16 00 pH 2000 mV 20 0 to 120 0 C 4 0 to 248 0 F Resolution 0 01 pH 0 1 mV 999 9 mV 1 mV outside 0 1 C 0 1 F Accuracy 0 01 pH 25 C 77 F 0 2 mV up to 699 9 mV 0 5 mV up to 999 9 mV 2 mV outside 0 4 C 0 7 F excluding probe error Relative mV Offset 2000 mV pH Calibration Up to 5 point calibration with 7 standard buffers pH 1 68 4 01 6 86 7 01 9 18 10 01 12 45 Temperature Manual or automatic Compensation 20 0 to120 0 C 4 0 to 248 0 F pH Electrode AD1230B Temperature Probe AD7662 Log on demand 500 samples Printer AD132 only External serial printer PERIODIC MAINTENANCE Inspect electrode and cable The cable used for connection to the instrument must be intact and there must be no points of broken insulation on the cable or cracks on the electrode stem or bulb Connectors must be perfectly clean and dry If any scr
18. calibration is needed when they are replaced If temperature measurements are not accurate temperature new calibration should be performed For an accurate recalibration contact your dealer or the nearest Adwa Customer Service Center or follow the instructions below Prepare a vessel containing ice and water and another one containing hot water at approximately 50 C 122 F Place insulation material around the vessels to minimize temperature drift Use a calibrated thermometer with a resolution of 0 1 C or 0 1 F as reference thermometer Connect the supplied AD7662 temperature probe to the appropriate socket on the rear panel With the instrument off press and hold the CAL amp up arrow keys then power on the instrument The CAL tag lights up and the secondary LCD shows 0 0 C or 32 0 F The primary LCD will display the measured temperature or if the reading is out of range 45 BATTERY REPLACEMENT When the battery level becomes too low to ensure reliable readings the meter automatically turns off Battery replacement must only take place in a safe area and using the battery type specified in this instruction manual To replace rundown batteries remove the battery cover and substitute all four 1 5V AA alkaline batteries with new ones while paying attention to the correct polarity Reattach and tighten the battery cover making sure that the gasket is in place J j
19. e All data regarding pH and relative mV calibrations are stored in the instrument memory To enter GLP mode press SHIFT and then GLP key If no calibration has been performed the no CAL message will blink GLP K ma n D a NN r Va CALIBRATION TIME OUT ALARM The instrument allows to set the number of days from 1 to 7 before the next required pH calibration The default 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 26 SETUP Setup mode allows viewing and modifying the following parameters e Calibration alarm time out e One point calibration behavior e Temperature measure unit e Current date yyyy mm dd e Current time hh mm e Printer status AD132 only e Auto off Baud rate serial communication AD132 only s Command prefix serial communication AD132 only e Instrument ID To enter SETUP mode from measurement mode press SHIFT and then SETUP Press CAL to change the i N SETUP item value The selected a Ba a item e g hour while tl 1 setting the time and Rey TI Hi CFM tag will blink e Use the arrow keys to scroll the available values 31 LAST RELATIVE mV CALIBRATION DATA Last relative mV calibration data are stored automatically after a successful calibration
20. ease the value of temperature or other parameters to obtain a printout or cancel printing RANGE key to select measurement range or switch focused data STORE MRCL key to store measured data and enter exit the logged data viewing mode Liquid Crystal Display LCD RS232 connector AD132 only BNC connector for pH or ORP electrodes Temperature probe socket OPERATIONAL GUIDE The meter is supplied complete with four 1 5V AA alkaline batteries Remove the rear cover unwrap the batteries and install them while paying attention to the correct polarity see Battery Replacement section Connect pH electrode and temperature probe to the BNC and temperature sockets on the top of the instrument Slide the BNC protection sleeve to completely cover the BNC connector Temperature BNC probe socket protection i BNC connector for pH or ORP electrodes Liat The temperature probe is used in conjunction with the pH electrode to utilize the meter s ATC capability but it can also be used independently to take temperature measurements If the probe is disconnected the temperature can be set manually using the arrow keys 10 e Press CFM to confirm The instrument returns to normal measurement mode Notes e If the reading is not close to the selected calibration point the WRONG tag will blink Change the temperature probe and restart calibration e Press CAL at any time to quit the procedure
21. g followed by the FrEE 0 message T7 LOG LIN All TN N 7 Sea D m ro r c a ra The instrument returns to normal measurement mode 35 LOG ON DEMAND This feature allows the user to log pH and Rel mV measurements together with temperature Moreover for AD132 all logged data can be transferred to a PC or printed through the RS232 port Both models AD131 and AD132 can store up to 500 samples into memory LOGGING To store the current reading into memory press the STORE key from measurement mode The instrument displays the current date mm dd on the primary LCD while the secondary LCD shows the record number with the LOG tag blinking for a few seconds and then the number of free locations EN oO IS AI e G mI ML DATE Log L zal LA ONE POINT CALIBRATION e Two setup options are available Pnt and OFFS e Ifthe Pnt option is selected the adjacent slopes will be reevaluated e If the OFFS option is selected an electrode offset correction is performed keeping unchanged the existing slopes Proceed as described in the Five point calibration section and press CAL after the first accepted calibration point The instrument will memorize the single point calibration data and return to normal measurement mode Notes Press RANGE to toggle between pH buffer and temperature reading durin
22. g calibration Each time a buffer is confirmed the new calibration parameters replace the old data of the corresponding buffer Ifcurrent confirmed buffer has no correspondence in the stored calibration it will be added to the existing calibration data If the stored calibration is a five point procedure the instrument will ask which buffer should be replaced 23 Use the arrow keys to select the buffer to be replaced then press CFM to confirm or CAL to exit calibration without replacing CLEAR CALIBRATION If the SHIFT and CLR keys are pressed at any time during calibration the CLEAR CAL tag lights up and the donE message is displayed on the secondary LCD All previous calibrations are cleared and the instrument continues the procedure The points already confirmed for the current calibration are not deleted The CAL DUE message will blinks in measurement mode to advise the user that a pH calibration is required Note If SHIFT and CLEAR are pressed during the first calibration point the instrument returns to measurement mode 24 The following table lists all the available SETUP parameters their valid values and the factory settings default Item Description Valid values Default CAL DUE Time out alarm OFF 1 to 7 days OFF 1 Pnt 1 point cal behavior Pnt OFFS Pnt tEMP Temperature unit C F C Date Date yyyy mm dd 2000 01 01 2004 01 01 to 2099 12 31 Time Time
23. orresponding warnings r r E86 BB 190 e Calibration time out alarm a status The display shows nacre OFF if the feature is Ly disabled or the days remaining before the doy calibration alarm will be activated or after the calibration is expired e g 3 28 e The instrument ID GLP Notes e The OLd message displayed beside a buffer value means that this buffer was not used during 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 The no buF message means that calibration was performed at less than five points 29
24. reading is equal to the difference between the absolute mV input value and relative mV offset established in the relative mV calibration 14 From setup mode if CAL and then PRINT is pressed for a chosen parameter a help printout will provide the following information e g Alarm Time Out When in logging mode an automatic printout will provide the following information for pH and mV 43 SET ALARM TIME OUT OFF or 1 7 Active Keys increment v decrement CAL exit no save CFM save amp exit CLR set to default SA Date 2004 01 01 Time 01 13 53 pH 7 01 mv 23 3 og 26 2 When exiting the setup mode the instrument asks if the setup report has to be printed The Prn message will be displayed together with the printer symbol and the CFM tag blinking Press CFM to print the setup report or CAL to exit without printing 42 SETUP REPORT Instr ID 0003 Cal Time Out OFF One Cal Point pnt Date 2004 01 01 Time 02 28 34 Printer ON Auto off no Baud Rate 2400 Comm prefix 16 Temperature SG TEMPERATURE MEASUREMENTS Connect the AD7662 temperature probe to the appropriate socket Immerse the temperature probe into the solution and allow the reading to stabilize Notes e The temperature can be displayed in Celsius C or Fahrenheit F degrees see Setup section for details e Make sure that the temperature probe is immersed in the same sample th
25. ts up and the secondary LCD shows 0 0 mV Set the simulator to 0 0 mV When the reading is stable and close to the selected calibration point the CFM tag starts blinking Press CFM to confirm and the secondary LCD will display the second expected value 600 0 mV Set the simulator to 600 0 mV When the reading is stable and close to the selected calibration point the CFM tag starts blinking Press CFM to confirm The secondary LCD will display the third expected value 1800 mV Set the simulator to 1800 0 mV When the reading is stable and close to the selected calibration point the CFM tag starts blinking Press CFM to confirm The instrument returns to measurement mode Notes e Ifthe reading is not close to the selected point the WRONG tag will blink Verify the calibration 48 11 12 13 14 Holders for probes ON OFF key to turn the instrument ON and OFF HOLD CLR key to freeze stable reading on the LCD and clear calibration or logged data CAL SETUP key to enter exit calibration mode or enter exit SETUP mode CFM GLP key to confirm value and display GLP information SHIFT key to activate the key second function Press first SHIFT and then the selected key The SHIFT tag is displayed until the second key is pressed DOWN arrow PAPER PAPER for AD132 only to manually decrease the value of temperature or other parameters or to pull out printer paper UP arrow PRINT PRINT for AD132 only key to manually incr
26. uffer 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 blinks or WRONG for buffer not recognized Press the CFM key to confirm calibration The calibrated value is then displayed on the primary LCD and the secondary LCD shows the third expected buffer value After the second calibration point is confirmed immerse the pH electrode and the temperature probe approximately 4 cm into the third 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 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 blinks or WRONG for buffer 20 Press RANGE key to scroll all logged parameters displayed as shown in the table below Parameter Primary LCD Secondary LCD mV mV reading Temperature TIME Hour amp minutes Seconds DATE Year Month amp day OFFSET Offset value Lot or record number SLOPE Slope value Lot number Notes e To view the previous logged parameter press the left arrow key e In relative mV memory recall mode the offset value is not available and the display shows dashes e The record number is an identification number inside a lot After scrolling all logged
27. utof Replace the calibrate or gives order pH electrode electrode faulty readings Explicit warnings Dirty brokenpH Follow displayed are displayed electrode contami instructions during pH nated reference or calibration buffers At start up the One of the keys is Check the meter displays all blocked keyboard or LCD perma contact the nently vendor Prn Eror error Printer error Turn the meter off message dis and then turn it played on If the error persist contact your dealer Err xx error Internal error Turn the meter off message dis and then turn it played on If the error persist contact your dealer 53 TROUBLESHOOTING GUIDE SYMPTOMS PROBLEM SOLUTION Slow response Dirty pH electrode Soak in AD7000 excessive drift solution for 30 minutes and then clean the electrode Readings Clogged dirty Clean the electrode fluctuate up and junction Low Refill with fresh down noise electrolyte level solution for for refillable refillable electrodes electrodes only only Only blinking Out of range in the Make sure the pH dashes during pH scale sample is in the pH measure specified range ments Calibrate Check electrolyte level and general state of the electrode Blinkingreading Reading out of Check sample or during measure ments range or electrode not connected connect electrode Out of range in Dry mem
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