AD 131 and AD 132 pH/mV/Temperature Waterproof Meters USER
Contents
1. 31 e If another item has to be set e g minutes press RANGE or left right ar row key and the item will start blinking 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 pa rameter The following table lists all the available SETUP param eters 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 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 LOG ON DEMAND This feature allows the user to log pH and Rel mV mea surements 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 tag2. 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 33 dashes e The record number is an identification number inside a lot After scrolling all logged parameters the meter displays the dEL message together with the lot number Note Pressing SHIFT and then SETUP key the in strument toggles between record number and del ALL 37 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 mea surement mode LoG I mm D Em 5 pam r e Press SHIFT and MRCL at any time to return to mea surement mode 38 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 ee hue a AH i _ pH LI L an Lut 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 measure ment mode Note Pressing RANGE the instrument will skip to the displayed range without leaving the HOLD mode The STORE key also holds HOLD
3. the first buffer solution pH 1 68 4 01 6 86 7 01 10 01 or 12 45 and stir gen tly The temperature probe should be close to the pH electrode e To enter the pH calibration mode press CAL from pH measurement mode e The instrument will display the measured pH on the primary LCD and the 7 01 pH buffer on the sec ondary LCD together with CAL and Cal Point 1 tags e If necessary use the arrow keys to select a different e 18 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 Press the CFM key to confirm calibration The calibrated value is then displayed on the primary LCD and the secondary LCD shows the second ex pected buffer value together with the CAL and Cal Point 2 tags Nu ae 2 Ut l LI 1 wert Ta a Note If the 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 approxi mately 4 cm into the second buffer solution and stir gently The temperature probe should be close to the pH electrode 19 e 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 sta
4. mode Pressing SHIFT and then SETUP GLP or MRCL key the instrument leaves the HOLD mode and performs the selected function 39 PRINTING AD132 only When connected to an external serial printer a com plete 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 s Time 02 25 17 the printout provides the following pa a OL information mV 23 2 sg 26 3 When in GLP mode the printout provide the following information 40 e For pH range RI 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 eer eee 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 AutoOfft 5 NO Baud rate Command prefix Instrument ID CAL enter in modifying mode SET exit SETUP RANGE select parameter See also items He
5. 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 4200 0 mV the CFM tag will be displayed Press CFM to confirm relative mV calibration and the instrument will return to normal measurement mode If the absolute mV reading is out of range or the rela tive 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 pro cedure 25 GOOD LABORATORY PRACTICE GLP GLP is a set of functions that allows data storage and retrieval about the electrode status and maintenance 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 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 26 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 d
6. pH 4 01 buffer 20 ml sachet 25 pcs pH 4 01 buffer 230 ml bottle pH 7 01 buffer 20 ml sachet 25 pcs pH 7 01 buffer 230 ml bottle pH 10 01 buffer 20 ml sachet 25 pcs pH 10 01 buffer 230 ml bottle Electrode cleaning solution 230 ml bottle Electrode storage solution 230 ml bottle Electrode rinsing solution 20 ml sachet 25 pes Electrode rinsing solution 230 ml bottle Electrode holder Serial communication cable 5 to 9 pins 54 33 ADWA HUNGARY Kft Als6kik6t6 sor 11 6726 Szeged Hungary Tel 36 62 317 878 Fax 36 62550610 www adwainstruments com MANAD132R3 03 11
7. 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 10 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 increase 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 polarit
8. NIZED WATER 50 PERIODIC MAINTENANCE Inspect electrode 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 electrode stem or bulb Connectors must be per fectly clean and dry If any scratches or cracks are present replace the electrode Rinse off any salt depos its with water CLEANING PROCEDURE Soak in A7061M general cleaning solution for approxi mately 30 minutes IMPORTANT After performing any of the cleaning procedures rinse the electrode thoroughly with A7000M refill the reference chamber with fresh elec trolyte and soak the electrode in A70300M storage so lution for at least 1 hour before taking measurements 51 TROUBLESHOOTING GUIDE SYMPTOMS PROBLEM SOLUTION Slow response Dirty pH electrode Soak in A7000M excessive drift solution for 30 minutes and then clean the elec trode Readings Clogged dirty Clean the elec fluctuate up and junction Low trode down noise electrolyte level Refill with fresh for refillable solution for electrodes only refillable elec trodes only SYMPTOMS PROBLEM SOLUTION The meter does Out of order Replace the probe not work with temperature probe temperature probe The meter failsto Broken or out of Replace the calibrate or gives order pH electrode electrode faulty readings Explicit warnings Dirty broken pH Follow dis
9. USER MANUAL A pa AD 131 and AD 132 pH mV Temperature Waterproof Meters AD 132 pH mV 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 89 336 EEC and Low Voltage Directive 73 23 EEC 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 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 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
10. any accident whether directly or indi rectly caused by the use of this instrument 2 TABLE OF CONTENTS IMtrOGUCHON we cciesacecewviteceis ne NR 4 Technical Dalies nre RE 6 Front and Top P ls ai ss seisaassi ra a ir 8 Operational G i e sista kun iki s lks 10 PH Calibration cise skri a ans i esa slasa RE EE 16 Relative mV Calibration 0eee00e eee 25 Good Laboratory Practice GLP 00 26 STS LR e E 31 Lop on Gemaind ss cevics sees scccsses ceestscceasticscessseevstssscaits 34 Hold Function ERROR 39 Printing AD132 Only 132 essssadssni sasssa 40 Battery Replacement 00 00eeerree een dd 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 0 0 ec eeeeeeeeeeeseceneceteceeeees 52 Electrodes Probes and Solutions cc 54 INTRODUCTION AD131 and AD132 are heavy duty portable waterproof meters for pH ORP Oxidation Reduction Potential and temperature measurements designed to provide labora tory results and accuracy even under harsh industrial conditions Main features include e 7 memorized buffers for pH calibration pH 1 68 4 01 6 86 7 01 9 18 10 01 and 12 45 e Messages on the LCD to make the calibration easy and accurate e pH readings with manual or automatic t
11. ble 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 im merse 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 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 blinks or WRONG for buffer 20 not recognized Press the CFM key to confirm calibration The calibrated value is then displayed on the primary LCD and the second ary LCD shows the fourth expected buffer value After the third calibration point is confirmed immerse the pH electrode and the temperature probe approxi mately 4 cm into the third buffer solution and stir gen tly 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 recogn
12. blinking for a few seconds and then the number of free locations l oG NN LIN _ up TI aa rs mim DATE Logi mim If there are less than 6 memory locations left the record number and the Lo message will blink for a few sec onds to alert the user and then the number of free loca tions is displayed If the logging space is full the FULL LOC message will be displayed for a few seconds together with the LOG tag blinking followed by the FrEE 0 message VT7 LOG 11 7 Z ZN E LI L nr Lue The instrument returns to normal measurement mode 35 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 Otherwise the instrument displays the memorized pH or relative mV reading and the lot number LOG 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 Press RANGE key to scroll all logged parameters dis played 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
13. emperature compensation e Calibration time out alarm e Log on demand e HOLD feature to freeze stable reading on the LCD e GLP feature to view last calibration data for pH and relative mV e PC interface AD132 only 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 A1230B pH electrode with double ceramic junction BNC connector and m cable e A7662 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 20 C 68 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 A1230B Temperature Probe A7662 Log on demand 500 samples Printer AD132 only External serial printer PC Interface AD132 only RS232 port Input Impedance 107 Ohm Environment 0 to 50 C 32 to 122 F RH max 100 non condensing Power Supply 4x 1
14. from the instrument to the PC using the ADSW10 Windows compatible software op tional 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 49 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 A70300M 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 A70300M storage solution NEVER STORE THE ELECTRODE IN DISTILLED OR DEIO
15. gasket is in place i Note When batteries are re moved the meter can remember date amp time for about 1 minute Af ter that it will be nec essary to set again date amp time through the setup procedure 44 TEMPERATURE CALIBRATION for technical personnel only The instruments are factory calibrated for temperature Adwa s temperature probes are interchangeable and no temperature calibration is needed when they are replaced If temperature measurements are not accurate tempera ture 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 an other 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 A7662 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 Immerse the temperature probe into the vessel with ice and water as close as possible to the reference thermo
16. 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 LAST RELATIVE mV CALIBRATION DATA Last relative mV calibration data are stored automati cally after a successful calibration 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 pa rameters 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 re turn to normal measurement mode 30 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 s 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 e Press CAL to change the NS SETUP item value The selected mA m 1 item e g hour while set Ly 1 ting the time and CFM Ste TE m tag will blink Use the arrow keys to scroll the available values
17. is abled 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 NN last calibration l Ad LLL I CAL TIME 27 e The pH calibration offset ai r GN 3 lt Offset mm cual e pH calibration slope the GLP slope is the average of the calibration slopes stops the percentage is referred to the ideal value of 59 16 mV pH e Calibration buffers in the order used for calibration together with the corresponding warnings GLP pa Ba ml ja be l a m mr I YO GB6 tba i0gr Bld ld e Calibration time out alarm status The display shows nce OFF if the feature is dis Lr abled or the days remain ing before the calibration d H H alarm will be activated or after the calibration is ex pired e g 3 28 e The instrument ID ap mt tg I ILL i t in i 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
18. ized 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 After the fourth calibration point is confirmed immerse the pH electrode and the temperature probe approxi mately 4 cm into the third buffer solution and stir gen tly 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 re turns to normal measurement mode FOUR THREE or TWO POINT CALIBRATION Proceed as described in the Five point calibration sec tion and press CAL after the appropriate accepted cali bration point The instrument will memorize the calibra tion data and return to normal measurement mode 22 ONE POINT CALIBRATION Two setup options are available Pnt and OFFS If the Pnt option is selected the adjacent slopes will be reevaluated If the OFFS option is selected an electrode offset correction is performed keeping unchanged the exist ing slopes Proceed as described in the Five point calibration section and press CAL after
19. lp printings e 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 lt and the CFM tag blink ing 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 c From setup mode if CAL and then PRINT is pressed for a chosen pa rameter 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 2004 01 01 Time 01 13 53 pH 7 01 mV 23 3 26 2 BATTERY REPLACEMENT When the battery level becomes too low to ensure reli able 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 batter ies remove the battery cover and substitute all four 1 5V La AA alkaline batteries with m new ones while paying atten tion to the correct polarity Reattach and tighten the bat tery cover making sure that the
20. meter Allow a few seconds for probe thermal stabilization Use the arrow keys to set the reading on the second ary LCD to that measured by the reference thermom eter 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 ves sel 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 second ary 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 e Press CFM to confirm The instrument returns to normal measurement mode Notes e If the reading is not close to the selected cali bration point the WRONG tag will blink Change the temperature probe and restart calibration e Press CAL at any time to quit the procedure 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 poi
21. nge use pH 4 01 or 1 68 as second buffer If you are measuring in the alka line 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 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 per form 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 calibra tion 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 calibration has been performed and an offset correction of the electrode is desired keep ing 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 adja cent to the calibration points will be reevaluated 17 FIVE POINT CALIBRATION e Immerse the pH electrode and the tem perature probe approximately 4 cm into
22. nt procedure can be performed at 0 0 600 0 and 1800 mV 47 e 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 lights 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 dis play 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 mea surement mode Notes e If the reading is not close to the selected point the WRONG tag will blink Verify the calibra 48 tion conditions or contact your dealer if calibra tion can not be performed e To return to normal measurement mode press CAL at any moment during calibration e 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 only Data can be transferred
23. played 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 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 Blinking reading Reading out of Check sample or during measure ments range or electrode not connected connect electrode Prn Eror error message dis Printer error Turn the meter off and then turn it Out of range in Dry membrane Soak in A70300M the mV scale junction storage solution for Lh 52 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 ELECTRODES PROBES AND SOLUTIONS A1230B A3230B A7662 A70004P A7004M A70007P A7007M A70010P A7010M A7061M A70300M A70000P A7000M AD9315 AD9551 pH electrode with Epoxy body tip pro tection bottle BNC connector with pro tection sleeve and 1 m cable ORP electrode with Epoxy body tip pro tection bottle BNC connector with pro tection sleeve and 1 m cable Stainless steel temperature probe with 1 m cable
24. 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 pri mary LCD and the current temperature value on the secondary LCD The relative mV reading is equal to the difference be tween the absolute mV input value and relative mV off set established in the relative mV calibration 14 TEMPERATURE MEASUREMENTS Connect the A7662 temperature probe to the appropriate socket Immerse the tem perature 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 sec tion for details e Make sure that the temperature probe is im mersed in the same sample that 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 If the CAL DUE message blinks during measure ment 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 ra
25. the first accepted cali bration point The instrument will memorize the single point calibration data and return to normal measure ment mode Notes e Press RANGE to toggle between pH buffer and temperature reading during calibration e Each time a buffer is confirmed the new cali bration parameters replace the old data of the corresponding buffer e If current confirmed buffer has no correspon dence in the stored calibration it will be added to the existing calibration data If the stored cali bration is a five point procedure the instrument 23 will ask which buffer should be replaced 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 RELATIVE mV CALIBRATION To enter relative mV calibration mode press CAL from relative mV measurement mode The relative mV is displayed
26. y see Battery Replacement section Connect pH electrode and temperature probe to the BNC and temperature sockets on the top of the in strument Slide the BNC protection sleeve to com pletely cover the BNC connector Temperature BNC probe socket protection BNC connector forpH or ORP electrodes a LL 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 tem perature can be set manually using the arrow keys 10 INSTRUMENT START UP e Turn the instrument on by pressing ON OFF e At start up the display shows all the used segments for a few seconds or while the button is held fol lowed by date and time then enters the measurement mode AutoLOG GLPSETUPMTC ATC ER TH I a s LL Cal Point GALDUEGFM FR BBBB WRONG CLEAR CAL pH MEASUREMENTS Make sure the instrument has been calibrated before taking pH measurements e If necessary 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 s displayed on the pri mary LCD and the temperature on the secondary LCD If measurements are taken successivel
27. y in different samples it is recommended to rinse the electrode thor oughly 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 pro vided with temperature compensation feature To use the automatic temperature compensation ATC fea ture connect and immerse the A7662 temperature probe into the sample as close as possible to the elec trode and wait for a few seconds 12 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 blink ing The temperature value can be adjusted using the ar row 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 Immerse the tip of the ORP electrode at Press RANGE to enter the mV mode least 4 cm into the solution to be tested and wait a few seconds for the reading to stabilize 4cm lt e The instrument displays the mV reading on the pri mary LCD and the temperature on the
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