Hanna Instruments Work Light HI 9124 User's Manual
Contents
1. 7 e Insert four new 1 2V AAA 1000 mAh NiMH rechargeable batteries in the battery compartment while paying attention to the correct po larity Make sure that the Battery type switch is in NiMH position WARNING INALK POSITION t Ad WARNING Do not replace the rechargeable batteries with normal alkaline batteries LN Ni MH ALK Never place an instrument with alka line batteries on the recharger The manufacturer will not assume any obligation for malfunctioning appeared as a result of using alkaline batteries If for any reason it is necessary fo use alkaline batteries set the Battery type selection switch in the proper position ALK The instrument allows the user to configure several parameters through the Setup Menu To enter the Menu mode while in measurement mode press and hold the SETUP key for about 5 seconds Once the menu is entered each parameter can be changed by using the arrow keys then pressing the CFM key will confirm the value and scroll to the next parameter 1 Acoustic signal On default or Off SETUP SETUP bEEP bEEP OFF gt 4 1 un 2 Auto off feature 20 minutes default or disabled SETUP SETUP AGF F AGF F an w cu EP na 3 Temperature measure unit C default or F Uni Un it p EIS uc Se After setting the last parameter pressing the CFM key2. After measurement switch the meter off Clean the electrode and store it with a few drops of HI 70300 storage solution in the protective cap To save batteries the auto off feature turns the meter off after 20 minutes with no button pressed To disable this feature see Setup Menu section on page 13 pH MEASUREMENTS To take a pH measurement remove the electrode protective cap and submerge the electrode and the temperature probe 4cm 1 4 into the Y sample and stir gently If necessary press the RANGE key until the display shows pH mode HI 9125 only Allow time for the reading to stabilize RANGE pH ELECTRODES All electrodes part numbers ending in B are supplied with a BNC connector and 1 m 3 3 cable as shown below HI 1043B Glass body double junction refillable combination pH electrode Use strong acid alkali 9 5mm DIA 12 mm 0 37 0 5 mm ne b ry 120 mm al 47 HI 1053B Glass body triple ceramic conic shape refillable combination pH electrode Use emulsions Temm DI gt l la 120 mm 4 7 HI 1083B Glass body micro Viscolene non refillable combination pH electrode Use biotechnology micro titration 12 mm 0 5 5 mm 3 mm 0 2 0 12 3 0 DIA ae lt 120 4 7 HI 1131B Glass body single junction refillable combination pH electrode
3. Use general purpose 9 5mm DIA 12 mm 0 37 0 5 1 cwm D ry 1 120 mm 47 23 pH CALIBRATION SOLUTIONS 70004P 4 01 Buffer Solution 20 mL sachet 25 pcs 70007P 7 01 Buffer Solution 20 mL sachet 25 pcs 70010P 10 01 Buffer Solution 20 mL sachet 25 pcs HI7004L pH 4 01 Buffer Solution 500 mL bottle 7004M 4 01 Buffer Solution 230 mL bottle 70060 6 86 Buffer Solution 500 mL bottle 7006M 6 86 Buffer Solution 230 mL bottle 7007M 7 01 Buffer Solution 500 mL bottle 7007M 7 01 Buffer Solution 230 mL bottle HI7009L pH 9 18 Buffer Solution 500 mL bottle 7009M pH 9 18 Buffer Solution 230 mL bottle HI7010L pH 10 01 Buffer Solution 500 mL bottle HI 7010M 10 01 Buffer Solution 230 mL bottle ELECTRODE STORAGE SOLUTION 703000 Storage Solution 460 mL bottle 70300M Storage Solution 230 mL bottle ELECTRODE CLEANING SOLUTIONS 70000P Electrode Rinse Solution 20 mL sachet 25 pcs HI7061L General Cleaning Solution 460 mL bottle 7061M General Cleaning Solution 230 mL bottle 70731 Protein Cleaning Solution 460 mL bottle 7073M Protein Cleaning Solution 230 mL bottle 70741 Inorganic Cleaning Solution 460 mL bottle 7074M Inorganic Cleaning Solution 230 mL bottle HI7077L Oil amp Fat Cleaning Solution 460 mL bottle 7077M Oil amp Fat Cleaning Solution 230
4. calibration messages p WRONG READY MEMORIZED Lir carey eo LI F first or second 1 6 a calibration point 2 gur p AF Remove electrode protective cap before use Press to confirm calibration point Ga GB to recall memorized reading lt CED to memorize current reading to enter or exit electrode calibration RANE to select pH or mV range pH or mV measurement temperature reading or pH buffer value available keys in accordance with ihe selected mode GN to configure instrument parameters Mode tags light up for indicating the corresponding active mode and blink for warning the user MEASURE on measurement mode CALIBRATION on calibration mode has been entered MEMORIZE on measurement stored in the internal memory and frozen on the display RECALL MEMORIZED on stored value recalled Battery symbol blinking low battery condition Batteries should be recharged Calibration messages WAIT NOT READY blinking buffer has been recognized but reading is not stable READY on buffer has been recognized and reading is stable WRONG 25 and WRONG blinking alternatively wrong buffer value not recognized V Replace the rechargeable batteries only if necessary To replace the rechargeable batteries follow the next steps e Turn OFF the instrument Unscrew the screws from the bottom sides of the instrument e p
5. Slope Calibration From 80 to 108 Automatic from 20 0 to 120 0 C Temperature Compensation 4 0 to 248 0 F or manual without temperature probe pH Electrode 1230B included Temperature Probe HI 7662 included 4 x 1 2V AAA size Battery Type amp Life rechargeable batteries approx 200 hours of continuous use Auto off User selectable 20 minutes or disabled 7 mm 75280147 Weight meter only 425 g 15 oz Environment 0 50 gt 32 127 100 5 OPERATIONAL GUIDE INITIAL PREPARATION The meter is supplied with rechargeable batteries located inside the meter see page 14 for details To prepare the instrument for use connect the pH electrode and the temperature probe to the BNC and temperature sockets on the top of the instrument The temperature probe can be used independently to take temperature measurements or it be used in conjunction with the pH electrode to utilize Automatic Temperature Compensation ATC mode If the probe is disconnected temperature can also be set manually with the UP and DOWN arrow keys Turn the instrument ON by pressing ON OFF At start up the display will show the battery percentage and then all LCD segments while the instrument performs a self check or as long as the button is held MEASURE CALIBRATION RECALL MEMORIZI 88 WAIT g NOT WRONG READY BBBE The meter automatically enters measurement mode
6. f the reading is dose to the selected buffer and the reading is stable the READY symbol is displayed and the CFM symbol starts blinking on the LCD asking for confirmation Press the CFM key the value is stored in memory and the meter returns to normal mode Note The meter automatically skips the buffer used for the first calibration point to avoid erroneous procedure A difference of at least 1 5 pH unit is required between the two buffers used for the offset and slope calibration once calibrated at either pH 7 01 or 6 86 the instrument automatically ignores the other value for the second point same for pH 10 01 and 9 18 Note During calibration the secondary LCD shows the selected buffer value For the 9125 model it is possible to display the buffer temperature during calibration by pressing RANGE Note To clear a previous calibration and return to the default values press CFM then CAL after entering the calibration mode and before the first buffer is accepted The LCD will show CLr CAL for one second and then will return to normal mode 7 fr ONE POINT CALIBRATION For optimum accuracy it is always recommended to perform a two point calibration but for a faster operation a single point calibration can be used pH 7 01 or pH 6 86 NIST are normally used for this purpose even though the meters can be calibrated with any of the 5 memorized calibration values After calibrating the fi
7. the higher the resistance It takes more time for the reading to stabilize if the resistance is higher In addition the response time will suffer to a greater degree at temperatures below 25 C Q 2x10 1x10 2x10 1x105 2x107 1x107 20 10 O 10 20 30 40 50 60 70 80 90 C Since the resistance of the pH electrode is in the range of 50 200 Mohms the current across the membrane is in the pico Ampere range Large currents can disturb the calibration of the electrode for many hours For these reasons high humidity environments short circuits and static discharges can be detrimental to a stable pH reading The pH electrode s life also depends on the temperature If constantly used at high temperatures the electrode life is drastically reduced Typical Electrode Life Ambient Temperature 1 3 years 90 C Less than 4 months 120 C Less than 1 month Alkaline Error High concentrations of sodium ions interfere with readings in alkaline solutions The pH at which the interference starts to be significant depends upon the composition of the glass This interference is called alkaline error and causes the pH to be underestimated Hanna s glass formulations have the indicated characteristics odium lon Correction tor Glass at 20 25 Concentration 0 1 Mol L 1 0 Mol L e f the reading is not dose to the selected buffer WRONG 53 and WRONG T will blink alternatively e
8. SALES AND TECHNICAL SERVICE CONTACTS Instruction Manual Australia Tel 03 9769 0666 Fax 03 9769 0699 HI 9124 HI 9125 Tel 10 88570068 Fox 10 88570060 Portable Waterproof Egypt Tel amp Fax 02 2758 683 pH Meters Germany Tel 07851 9129 0 Fax 07851 9129 99 Greece Tel 210 823 5192 Fax 210 884 0210 Indonesia Tel 21 4584 2941 Fax 21 4584 2942 Japan Tel 03 3258 9565 Fax 03 3258 9567 Korea Tel 02 2278 5147 Fax 02 2264 1729 Malaysia Tel 603 5638 9940 Fox 603 5638 9829 Singapore Tel 6296 7118 Fax 6291 6906 South Africa Tel 011 615 6076 Fax 011 615 8582 Taiwan Tel 886 2 2739 3014 Fax 886 2 2739 2983 Thailand Tel 662 619 0708 11 Fax 662 619 0061 z gt United Kingdom 85 Tel 01525 850 855 Fax 01525 853 668 amp v 2 USA Tel 401 765 7500 Fax 401 765 7575 HANNA instruments For e mail contacts and a complete list of Sales and www hannainst com Technical offices please see www hannainst com Dear Customer Thank you for choosing a Hanna Instruments product Please read this instruction manual carefully before using the instruments This manual will provide you with the necessary information for correct use of the instruments as well as a precise idea of their versatility If you need additional technical information do not hesitate to e mail us at tech
9. TEMPERATURE DEPENDENCE 12 SETUP MENU s 13 mV CALIBRATION HI 9125 only 111211111212222 14 TEMPERATURE CALIBRATION 14 BATTERY REPLACEMENT ssvsssssssdssssesnnsscdssesssssnvssssssseusonnnnscccedcose 14 LCD MESSAGE GUIDE V TEMPERATURE CORRELATION FOR pH SENSITIVE 61455 18 ELECTRODE CONDITIONING amp MAINTENANCE 19 TROUBLESHOOTING GUIDE e 2 ACCESSORIES cen 22 RECOMMENDATIONS FOR USERS Before using these products make sure they are entirely suitable for the environment in which they are used Operation of these instruments in residential areas could cause unacceptable interferences to radio and TV equipment requiring the operator to follow all necessary steps to correct interferences The glass bulb at the end of the pH electrode is sensitive to electrostatic discharges Avoid touching this glass bulb at all times During operation ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharges Any variation introduced by the user to the supplied equipment may degrade the instruments EMC performance To avoid electrical shock do not use these instruments when voltages at the measurement surface exceed 24 VAC or 60 VDC To avoid damage or burns do not perform any measurement in mi
10. TION Remove the instrument from the packing material and examine it to make sure that no damage has occurred during shipping If there is any damage notify your dealer or the nearest Hanna Customer Service Center Each meter is supplied with e HI 1230B combination double junction gel pH electrode e HI 7662 stainless steel temperature probe with 1 m 3 3 cable pH 4 01 amp pH 7 01 buffer solutions 20 mL sachet 100 mL plastic beaker 4x 12 AM rechargeable batteries inside the instrument HI 710044 inductive recharger with power adapter Instruction manual e Rugged carrying case Note Save all packing material until you are sure that the instrument functions correctly All defective items must be returned in the original packing with the supplied accessories GENERAL DESCRIPTION The HI 9124 and HI 9125 are state of the art waterproof heavy duty pH meters designed to provide laboratory results and accuracy under harsh industrial conditions A large dual level LCD with clear indications related to the electrode and instrument status pH and temperature displayed simultaneously and user friendly graphic symbols during calibration The pH calibration procedure is automatic with 5 memorized buffers 4 01 6 86 7 01 9 18 and 10 01 buffer recognition and automatic temperature compensation The 9125 can be used with ORP Oxidation Reduction Potential electrodes mV measurements automatically change from 0 1
11. condary LCD will show the second buffer to be Junction Junction used for calibration pH 4 01 Platinum or Platinum or Gold tip Gold tip add Plastic Body Glass Body a ORP Electrode ORP Electrode soU gd HE Not present in gel electrodes to enter or exit electrode calibration PREPARATION PROCEDURE Remove the electrode protective cap DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT This is normal with electrodes and they will disappear when rinsed with water During transport tiny bubbles of air may have formed inside the glass bulb The eledrode cannot function properly under these conditions 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 70300 Storage Solution for at least one hour After the first calibration point is confirmed immerse the electrode into the second buffer pH 4 01 10 01 or 9 18 and stir gently Choose pH 4 01 for acidic samples and pH 10 01 or 9 18 for alkaline solutions Submerge the electrode approx 4 cm 114 into the solution place the temperature probe as close as possible to the electrode and stir gently Select the second buffer value on the secondary display by pressing the UP and DOWN arrow keys 10 19 TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS The resistance of glass electrodes partially depends on the temperature The lower the temperature
12. crowave ovens Hanna Instruments reserves the right to modify the design construction and appearance of its products without advance notice HI 1413B Glass body single junction flat tip Viscolene non refillable combination pH electrode Use surface measurement 12 mm 0 5 af es OO 110 mm 4 3 EY ORP ELECTRODES HI 3131B Glass body refillable combination platinum ORP electrode Use titration 12 mm 0 5 gt p 150 mm gt 5 9 ry HI 3230B Plastic body PEI gel filled combination platinum ORP electrode Use general purpose 12 mm d ELS ry be 120 mm re 4 7 HI 4430B Plastic body PEI gel filled combination gold electrode Use general purpose 12 mm 0 5 d sae lt 120 4 7 Consult the Hanna General Catalog for a complete and wide selection of electrodes OTHER ACCESSORIES 710044 Inductive recharger 721317 Rugged carrying case 740157 Plastic electrode refilling pipet 20 pcs 76405 Electrode holder 7662 Temperature probe with 1 m 3 3 screened cable 8427 and ORP electrode simulator with 1 m 3 3 coaxial cable ending in female BNC connectors 931001 and ORP electrode simulator with LCD and 1 3 3 coaxial cable ending in female BNC connectors 26 PRELIMINARY EXAMINA
13. hannainst com or turn to the back cover for our worldwide contact list These instruments are in compliance with C directives WARRANTY HI 9124 amp HI 9125 are guaranteed for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions Electrodes and probes are guaranteed for six months This warranty is limited to repair or replacement free of charge Damage due to accidents misuse tampering or lack of prescribed maintenance is not covered If service is required contact the dealer from whom you purchased the instruments If under warranty report the model number date of purchase serial number and the nature of the problem If the repair is not covered by the warranty you will be notified of the charges incurred If the instruments are to be returned to Hanna Instru ments first obtain a Returned Goods Authorization number from the Technical Service department and then send it with shipping costs prepaid When shipping any instrument make sure it is properly packed for complete protection TABLE OF CONTENTS WARRANTY 2 PRELIMINARY 3 GENERAL DESCRIPTION coorta 3 FUNCTIONAL DESCRIPTION starse nrorsnreae 4 SPECIFICATIONS peteret 5 OPERATIONAL cte en 6 pl CALIBRATION tct 9 pH BUFFER
14. lt in amplifier combination pH electrode Use very high humidity HI 1330B Glass body semimicro single junction refillable combination pH electrode Use laboratory vials 5mm DIA 5mm 0 2 0 2 lo 120 mm gt 47 1331B Glass body semimicro single junction refillable combination pH electrode Use flasks 8 mm 7 5mm DIA 0 29 210 mm HI 1230B Plastic body PEI double junction gel filled combination pH elec trode Use general field HI 1230 G 1 120 4 7 HI 2031B Glass body semimicro conic refillable combination pH electrode Use semisolid products 6 mm 0 25 A wa OOO HI 1332B Plastic body PEI double junction refillable combination pH electrode Use general purpose 12 mm 0 5 md SIN a m 120 mm gt 4 7 24 SPECIFICATIONS 2 00 to 16 00 pH 2 699 9 mV 1999 mV RANGE HI 9125 only 20 0 to 120 0 C 4 0 to 248 0 F 0 1 mV 1 mV RESOLUTION HI 9125 only 0 1 C 0 1 F 0 01 pH ACCURACY 02 mV 1 mV 20 C 68 F HI 9125 only 2 0 4 C 4 0 F exduding probe error 2 0 02 pH s 2 02 mV 2 1 mV Typical EMC Deviation HI 9125 only 2 0 4 C 2 0 8 F 1 or 2 point pH Calibration with 5 memorized buffers 4 01 6 86 7 01 9 18 10 01 Offset Calibration zc pH
15. mL bottle REFILLING ELECTROLYTE SOLUTIONS 50 mL 4 pcs HI 7071 3 5M KCI AgCI Electrolyte for single junction electrodes HI 7072 1M KNO Electrolyte HI 7082 3 5M Kd Electrolyte for double junction electrodes HI 8093 1M KCI AgCl Electrolyte ORP PRETREATMENT SOLUTIONS 70910 Reducing Pretreatment Solution 460 mL bottle 7091M Reducing Pretreatment Solution 230 mL bottle 70921 Oxidizing Pretreatment Solution 460 mL bottle 7092M Oxidizing Pretreatment Solution 230 mL bottle ORP SOLUTIONS HI7020L Test Solution 200 275 mV 500 mL bottle 7020 Test Solution 200 275 mV 230 mL bottle 70210 Solution 240 mV 500 mL bottle HI7021M Test Solution 240 mV 230 mL bottle HI7022L Test Solution 470 mV 500 mL bottle HI 7022 Test Solution 470 mV 230 mL bottle 22 The LCD will show the pH measurement and the temperature of the sample MEASURE In order to take more accurate pH measurements make sure that the instrument is calibrated see page 9 for details The glass bulb and the junction on the pH electrode should always be moist never allow it to dry out If several measurements are taken successively in different samples rinse the electrode thoroughly with deionized or tap water and a small amount of the sample to be measured The pH reading is directly affected by temperature In order for the meter to measure the pH accurately temperature must be compen
16. otes When the reading is out of range the display will flash the closest full scale value MEASURE Noi Sean LLLI LEM eub Press to recall memorized reading to memorize current reading to enter or exit electrode calibration to select pHor mV range to configure Instrument parameters f using pH electrode while in mV mode the meter will measure the mV generated by the pH electrode MEM amp MR FUNCTIONS The instrument allows the user to store the current measurement pH and temperature or mV and temperature into internal memory by pressing the MEM key The MEMORIZE tag lights up on display MEASURE MEMORIZE S nn MEM Press 02 to recall memorized reading HED to memorize current reading to enter or exit electrode calibration to select pH or mV rar to configure instrument parameters Stored value can be recalled by pressing MR the display will show the value as long as the button is pressed and the MEMORIZE tag MEASURE MEMORIZE B 15 Ss n MR Press 00 to recall memorized reading CED to memorize current readin to enter or exit electrode calibration to select pH or mV range to configure instrument parameters TROUBLESHOOTING GUIDE SYMPTOMS PROBLEM SOLUTION Slow reponse excessive drift Dirty pH electrode The electrode needs to be cleaned Follow the cleaning procedure on page 20 Reading fluctuate
17. rst point see above press the CAL key to end the calibration procedure pH BUFFER TEMPERATURE DEPENDENCE The temperature has an effect on pH The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions During calibration the instrument will automatically calibrate to the pH value corresponding fo the measured or set temperature pH BUFFERS E en em rm e o 32 4 01 698 7 13 9 46 10 32 41 4 00 695 7 10 9 39 10 24 50 400 692 7 07 9 33 10 18 59 400 690 7 05 9 27 10 12 68 400 6 88 7 03 9 22 10 06 77 4001 686 701 9 18 10 01 86 402 685 7 00 9 14 9 96 95 403 6 84 6 99 9 11 9 92 104 404 684 698 9 07 9 88 113 405 6 83 698 9 04 9 85 122 4 06 6 83 698 9 01 9 82 131 4 08 6 84 6 98 8 99 9 79 140 409 684 698 897 977 149 4 11 6 84 699 895 976 70 158 4 12 6 85 6 99 8 93 975 N 167 4 14 686 7 00 891 974 176 4 16 687 7 01 889 974 185 4 17 687 7 02 887 974 194 4 19 688 7 03 8 85 975 203 420 689 7 04 883 976 During calibration the instrument will display the pH buffer value at 25 C LCD MESSAGE GUIDE TAGS amp SYMBOLS mode tags MEASURE CALIBRATION RECALL nr WAIT
18. s desired e g 6 86 use the UP and DOWN arrow keys to change the displayed value a UL Ll war nor war nor C 0H VG Bab to enter or exit electrode calibration Wc to enter or exit electrode calibration e Submerge the electrode approx 4 cm 1 4 into the solution place the temperature probe as close as possible to the electrode and stir gently The LCD will flash the WAIT NOT READY message CALIBRATION i to enter or exit electrode calibration Once the reading is stable if it is not dose to the selected buffer ELECTRODE CONDITIONING amp MAINTENANCE Reference Fill Hole Reference Fill Hole WRONG 9 and WRONG T will blink alternatively if it is close to the selected buffer the display will change to READY and Wire blinking CFM Reference Sensing Wire ire CALIBRATION Reference Reference wm m i Junction LI LI Junction E Glass Glass READY Bulb Bulb BUF 18 I Plastic Body Glass Body EI rm rette pH Electrode Electrode to enter or exit electrode calibrati e Press the CFM key to confirm the calibration the meter stores the Reference Reference offset calibration point The calibrated reading is then displayed on the Wire Wire Reference Reference primary LCD while the se
19. s up and down noise Clogged dirty junction Low electrolyte level refillable electrodes only Clean the electrode Refill with fresh electrolyte refillable electrodes only Check cable and connector Display shows blinking full scale value Reading out of range Make sure the electrode is connected Check that the sample is within measurable range mV scale out of range Dry membrane or dry junction Soak electrode in HI 70300 storage solution or at least 30 minutes Check cable and connector Display shows blinking C or F Broken temperature probe Replace temperature probe Meter does not work with temperature probe Broken temperature probe Wrong temperature probe Replace temperature probe Display shows blinking battery symbol Low battery level Recharge batteries Meter fails to calibrate or gives faulty readings Broken pH electrode Replace electrode WRONG CALIBRATION is displayed during pH calibration procedure Wrong or contaminated buffer Check that buffer solution is correct and fresh Meter shuts off Dead batteries Auto off feature is enabled in this case meter shuts off after 20 min of non use Recharge batteries Press ON OFF ETO Er2 message at start up EEPROM error Contact your dealer or any Hanna Service Center Cr message at star
20. sated for If the sample temperature is different from the temperature at which the pH electrode was kept allow a few minutes for thermal equilibrium To use the meter s Automatic Temperature Compensation feature submerge the temperature probe into the sample as close to the electrode as possible and wait for a few minutes If manual temperature compensation is desired the temperature probe must be disconnected from the instrument The display will show the default temperature of 25 C or the last temperature set with the or F indicator blinking The temperature con now be adjusted with the UP and DOWN arrow keys 150 251 Press 02 to recall memorized reading t I MEASURE ORP MEASUREMENTS HI 9125 only To perform ORP measurements connect an optional ORP electrode see Accessories section to the meter and turn it ON If necessary enter the mV mode by pressing RANGE until the display changes to mV Submerge the electrode 4cm 1 4 into the sample to be tested and wait a few minutes for the reading to stabilize Measurements within the 699 9 mV range are displayed with 0 1 mV resolution while outside this range the resolution automatically switches to 1 mV For accurate measurements the surface of the electrode must be clean and smooth Pretreatment solutions are available to condition the electrode and improve its response time see Accessories section N
21. t up Loaded default pH calibration values Perform pH calibration 21 For refillable electrodes if the refill solution electrolyte is more than 2 cm 1 below the fill hole add the appropriate Electrolyte Solution MEASUREMENT Rinse the electrode tip with distilled water immerse it 4 cm in the sample and stir gently for a few seconds For a faster response and to avoid cross contamination of the samples rinse the electrode tip with the solution to be tested before taking any measurements STORAGE PROCEDURE To minimize clogging and ensure a quick response time the glass bulb and the junction should always be kept moist When not in use store it with a few drops of HI 70300 storage solution in the protective cap NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER PERIODIC MAINTENANCE Inspect electrode and cable The cable must be intact No cracks should be seen on the electrode stem or bulb If any scratches or cracks are present replace the electrode Rinse off any salt deposits with water Connectors must be perfectly clean and dry For refillable electrodes Refill the electrode with fresh electrolyte see the electrode s specifications to select the correct refilling solution Allow the electrode to stand upright for 1 hour Follow the Storage Procedure above CLEANING PROCEDURE General Soak in Hanna HI 7061 General Cleaning Solution for approximately 1 2 hour Pro
22. tein Soak in Hanna HI 7073 Protein Cleaning Solution for 15 min e Inorganic Soak in Hanna HI 7074 Inorganic CleaningSolution for 15 min il grease Rinse with Hanna HI 7077 Oil amp Fat Cleaning Solution for 1 min IMPORTANT After performing any of the cleaning procedures rinse the electrode thoroughly with distilled water and soak it in HI 70300 Storage Solution for at least 1 hour before taking measurements 20 pH CALIBRATION It is recommended to calibrate the instrument frequently especially if high accuracy is required The pH range should be recalibrated Whenever the pH electrode or temperature probe is replaced At least once a week e After testing aggressive chemicals e When extreme accuracy is required PREPARATION Pour a small quantity of buffer solution into clean beakers For accurate calibration use two beakers for each buffer solution the first one for rinsing the electrode and the second one for calibration PROCEDURE In order to perform pH calibration e Make sure that the meter is in the pH mode HI 9125 only e Remove the protective cap and rinse the electrode with some of the buffer solution to be used for the first calibration point There is a choice of 5 memorized buffers 4 01 6 86 7 01 9 18 and 10 01 pH TWO POINT CALIBRATION e Press the CAL key The CAL and i5 indicators will be displayed The secondary LCD will display buffer 7 01 If a different calibration buffer i
23. to 1 mV resolution when the reading reaches 700 mV FUNCTIONAL DESCRIPTION 1 Temperature probe socket 2 BNC electrode connector 3 Liquid Crystal Display LCD 4 RANGE key to select pH or mV HI 9125 only 5 ON OFF key to turn the meter ON and OFF 6 CAL key to enter or exit calibration mode 7 SETUP CFM key to enter SETUP mode or to confirm calibration 8 MR key to recall stored value from memory MEM key to store reading in memory 0 A and keys for manual temperature setting or selecting pH buffer value 11 Secondary display 12 Primary display FC 1008 Plastic body PVDF double junction refillable combination pH elec trode Use general purpose for food industry ake 120 mm gt 4 7 FC 200B Plastic body PVDF open junction conic Viscolene non refillable combination pH electrode Use meat amp cheese mm 6 0 25 Fc 200 NN scm lem 75 210B Glass body double junction conic Viscolene non refillable combination pH electrode Use milk yogurt 12 mm 0 5 120 mm 47 V FC 220B Glass body triple ceramic single junction refillable combination pH electrode Use food processing 9 5mm DIA 12 mm 0 37 0 5 LL FC911B Plastic body PVDF double junction refillable with bui
24. vided with the BEPS Battery Error Prevention System feature which automatically turns the instrument off when the battery level is too low to ensure reliable readings At start up the display will show 0 batt for few seconds then the meter automatically turns off bREE To recharge the rechargeable batteries follow the next steps onned the 12VDC power adapter to the main line and to the main line of the battery recharger The recharger front LED will turn ON e Place the instrument in the battery recharger case The complete charging process takes about 16 hours The Changing LED is ON until the changing process is completed Notes As the charging process is performed at low current the instrument can be left on the recharger more than 16 hours without damaging the rechargeable batteries It is recommended to turn off the instrument while recharging the batteries The measurements can be af fected by the recharging process Batteries recharging must only take place in a non hazard ous area using the HI 710044 inductive recharger
25. will confirm the value and return to measurement mode 13 mV CALIBRATION HI 9125 only HI 9125 has been precalibrated for mV range at the factory For optimum accuracy it is recommended to recalibrate the meter for mV readings at least once a year Contact your Dealer or the nearest Hanna Customer Service Center for more information TEMPERATURE CALIBRATION HI 9124 amp HI 9125 have been precalibrated for temperature at the factory For optimum accuracy it is recommended fo recalibrate the meter for temperature at least once a year Contact your Dealer or the nearest Hanna Customer Service Center for more information BATTERIES RECHARCHING REPLACEMENT The instrument is supplied with rechargeable batteries inside First time you start working with the instrument or when the rechargeable batteries are changed with new ones perform the following procedure Work with the instrument until the rechargeable batteries are fully discharged Perform a complete charging cycle about 16 hours Repeat this procedure 3 times At start up the battery percentage is displayed ca Ty IU bAt rr If the batteries become weak the display will flash the battery symbol to advise the user that there are approximately 25 hours of working time left MEASURE 650 een It is recommended to recharge the rechargeable batteries as soon as the display will flash the battery symbol The meter is also pro
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