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51

PREPARATION PROCEDURE

Remove the protective cap of the pH electrode.
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal 
with electrodes. They will disappear when rinsed with water.
During transport, tiny bubbles of air may form inside the glass bulb 
affecting proper functioning of the electrode. These bubbles can be 
removed by “shaking down” the electrode as you would do with a glass 
thermometer.
If the bulb and/or junction is dry, soak the electrode in 

HI70300

 or 

HI80300

 Storage Solution for at least one hour.

ELECTRODE CONDITIONING

AND MAINTENANCE

Summary of Contents for HI 2550

Page 1: ...1 Multiparameter pH ORP C EC TDS NaCl Bench Meter HI2550 Instruction Manual www hannainst com ...

Page 2: ...ecessary information for correct use of this instrument as well as a precise idea of its versatility If you need additional technical information do not hesitate to e mail us at tech hannainst com or view our worldwide contact list at www hannainst com All rights are reserved Reproduction in whole or in part is prohibited without the written consent of the copyright owner ...

Page 3: ...C TDS CALIBRATION 19 CONDUCTIVITY VERSUS TEMPERATURE CHART 21 NaCl CALIBRATION 22 GOOD LABORATORY PRACTICE GLP 23 LOGGING FUNCTION 28 SETUP 35 TEMPERATURE CALIBRATION FOR TECHNICAL PERSONNEL ONLY 42 mV CALIBRATION FOR TECHNICAL PERSONNEL ONLY 44 PC INTERFACE 45 ELECTRODE CONDITIONING AND MAINTENANCE 51 TROUBLESHOOTING GUIDE 54 TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS 55 ACCESSORIES 56 TABLE ...

Page 4: ...sation can be disabled to measure actual conductivity The GLP feature provides data consistency Data can be stored in the meters memory for later retrieval The meters memorycanhold200manuallyloggedpointsand500lotloggingpoints An USB connection ensures communication with a PC Removetheinstrumentfromthepackingmaterialandexamineitcarefully to make sure that no damage has occurred during shipping If t...

Page 5: ...nsation mode 6 SETUP key to enter exit SETUP mode LOCK key alternate function to freeze current EC range on the LCD 7 RANGE key to select measurement range pH mV EC switch to focused data in SETUP or toggle between buffer value and temperature during calibration MODE key alternate function to select mV or Rel mV on mV range or EC TDS NaCl on EC range 8 LOG CLR key to store a value into memory to c...

Page 6: ...to 2999 µS cm 3 00 to 29 99 mS cm 30 0 to 200 0 mS cm up to 500 0 mS cm uncompensated conductivity 0 00 to 14 99 ppm 15 0 to 149 9 ppm 150 to 1499 ppm 1 50 to 14 99 g l 15 0 to 100 0 g l up to 400 0 g l uncompensated TDS with 0 80 factor 0 0 to 400 0 NaCl 20 0 to 120 0 ºC pH EC range RESOLUTION 0 1 pH 0 01 pH 0 001 pH 0 1 mV 1000 mV 1 mV 2000 mV 0 01 µS cm 0 1 µS cm 1 µS cm 0 01 mS cm 0 1 mS cm 0 ...

Page 7: ...Automatic from 20 0 to 120 0 ºC pH RANGE 20 0 to 120 0 ºC EC RANGE can be disabled on conductivity range to measure actual conductivity Conductivity temperature coefficient 0 00 to 6 00 ºC for EC and TDS only default value is 1 90 ºC TDS factor 0 40 to 0 80 default value is 0 50 pH Electrode HI1131B EC Probe HI76310 Temperature probe HI7662 Input impedance BNC input 1012 ohms Log on demand feature...

Page 8: ...or EC TDS measurements connect the probe to the 7 pin connector Make sure the probe sleeve is properly inserted INSTRUMENT START UP Turn the instrument on by pressing the ON OFF switch located on the rear panel AllLCDtagsaredisplayedandabeepissoundedwhiletheinstruments perform a self test The instrument will display LoAd message and blinking until initialization is complete Notes The instrument st...

Page 9: ...ait for a few seconds Ifthetemperatureofthesampleisknown manualtemperaturecompen sation can be used by disconnecting the temperature probe The display will show the last temperature reading the MTC tag and the ºC tag blinking The temperature can now be adjusted with the ARROW keys from 20 0 ºC to 120 0 ºC mV ORP MEASUREMENTS An optional ORP electrode must be used to perform ORP measurements see Ac...

Page 10: ...vitymeasurementrange EC Submerse the probe into the solution to be tested The sleeve holes must be completely submersed Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve The conductivity value will be displayed on the primary LCD and the temperature on the secondary LCD Ifthereadingisoutofrange thefull scalevalue 200 0forMTC ATC mode or 500 0 for actual condu...

Page 11: ...no temperature probeisdetected ATCmodecannotbeselectedandtheinstrument displays on the secondary LCD Iftemperaturecompensationisselected measurementsarecompensated using the temperature coefficient default value 1 90 ºC To change the temperature coefficient enter the setup mode and select tc see SETUP for details page 36 The current temperature coefficient can be quickly viewed by pressing the ALT...

Page 12: ...he reading goes out of range the full scale value of the frozen range will be displayed blinking NaCl MEASUREMENTS Press the ALT MODE keys while in EC range until NaCl is displayed on theLCD TheinstrumentwilldisplaytheNaClreadingontheprimaryLCD and the temperature reading on the secondary LCD line If the reading is out of range the full scale value 400 0 will be displayed blinking TEMPERATURE MEAS...

Page 13: ...measuringinthealkalinerange usepH7 01or6 86asfirstbufferandpH10 01or9 18 assecondbuffer PROCEDURE Calibration can be performed at up to five points For accurate measurements a three point calibration is recommended The calibration buffer can be selected from the calibration buffer list that includes the custom buffers and the memorized standard buffers pH1 68 4 01 6 86 7 01 9 18 10 01 and 12 45 Th...

Page 14: ... the second expected buffer value on the secondary LCD Afterthefirstcalibrationpointisconfirmed submersethepHelectrode andthetemperatureprobeapproximately3cm 1 intothesecond buffersolutionandstirgently Thetemperatureprobeshouldbeclose to the pH electrode Ifnecessary presstheARROWkeystoselectadifferentbuffervalue The tagwillblinkontheLCDuntilthereadingisstable When the reading is stable and close t...

Page 15: ...tir gently The temperature probe should be close to the pH electrode Ifnecessary presstheARROWkeystoselectadifferentbuffervalue The tag will blink on the LCD until the reading is stable When the reading is stable and close to the selected buffer the CFM tag will blink Press CFM to confirm calibration The calibrated value is then displayed on the primary LCDandthefifthexpectedbuffervalueonthesecond...

Page 16: ... electrode When a custom buffer is displayed the Cust tag is displayed To change the custom buffer value in accordance with the buffertemperatureproceedasdescribedin WORKINGWITHCUSTOM BUFFERS see page 17 If the buffer temperature or the manual temperature exceeds the temperature limits of the buffer WRONG tag and temperature reading will blink If WRONG Buff tags and OLd message are displayed blink...

Page 17: ...ation without replacing Note If the replaced buffer is outside the 0 2 pH window around each of the calibrated buffers it is possible to select this buffer for next calibration during current calibration WORKING WITH CUSTOM BUFFERS If a custom buffer was set in SETUP menu it can be selected during cali bration by pressing the ARROW keys The Cust tag will be displayed Press SETUP if you want to adj...

Page 18: ...0 18 12 99 15 59 1 67 4 00 6 90 7 05 9 27 10 12 12 80 20 68 1 68 4 00 6 88 7 03 9 22 10 06 12 62 25 77 1 68 4 01 6 86 7 01 9 18 10 01 12 45 30 86 1 68 4 02 6 85 7 00 9 14 9 96 12 29 35 95 1 69 4 03 6 84 6 99 9 11 9 92 12 13 40 104 1 69 4 04 6 84 6 98 9 07 9 88 11 98 45 113 1 70 4 05 6 83 6 98 9 04 9 85 11 83 50 122 1 71 4 06 6 83 6 98 9 01 9 82 11 70 55 131 1 72 4 08 6 84 6 98 8 99 9 79 11 57 60 1...

Page 19: ...w 2000 mV EC TDS CALIBRATION Selectable calibration points for conductivity are 0 00 µS for offset and 84 0µS 1413µS 5 00mS 12 88mS 80 0mS 111 8mSforslope Rinse the probe with calibration solution or deionized water Submerse the probe into the solution The sleeve holes must be completely submersed Tap the probe repeatedlytoremoveanyairbubblesthatmaybetrapped inside the sleeve ToenterECcalibration ...

Page 20: ...f the calibration solution has been used or clean the probe by following the Cleaning Procedure see page 53 If the meter is in ATC or MTC mode and the buffer temperature is out of the 0 0 C to 60 0 ºC interval WRONG ºC tags and the temperature will blink For best results choose an EC buffer value close to the sample to be measured In order to minimize any EMC interference use plastic or glass beak...

Page 21: ...033 HI8033 mS cm HI7034 HI8034 mS cm HI7035 HI8035 mS cm HI7039 HI8039 mS cm 0 32 7150 776 64 48300 65400 2760 5 41 8220 896 65 53500 74100 3180 10 50 9330 1020 67 59600 83200 3615 15 59 10480 1147 68 65400 92500 4063 16 60 8 10720 1173 70 67200 94400 4155 17 62 6 10950 1199 71 68500 96300 4245 18 64 4 11190 1225 73 69800 98200 4337 19 66 2 11430 1251 74 71300 100200 4429 20 68 11670 1278 76 72400...

Page 22: ...primary LCD will display the NaCl reading in percentage The secondary LCD will display 100 The and tags will blink When the reading is stable the READY tag will be displayed and the CFM tag starts blinking on the LCD asking for confirmation Press CFM to confirm calibration The instrument stores the calibration value and returns to measurement mode Notes If the reading is too far from the expected ...

Page 23: ...uld be recalibrated For example if a 4 days time out has been selected the instrument will issue the alarm exactly 4 days after the last calibration If the expiration value is changed e g to 5 days then the alarm will beimmediatelyrecalculatedandappear5daysafterthelastcalibration Note If the instrument was not calibrated the CAL DUE tags will be displayed even if the feature is disabled in SETUP m...

Page 24: ...th pH calibration buffer The fifth pH calibration buffer Notes The OLd messagedisplayedbesidethepHvaluemeans that this buffer was not used during last calibration Press and hold down the SETUP key if you want to see calibration date or time if old calibration was performed on the same day as the current calibration If nobUF messageappearsontheLCD theinstrument informs you that calibration was perf...

Page 25: ...whentheinstrument is in Relative mV measurement mode The instrument will display the time hh mm of the last calibration Use the ARROW keys to scroll through the calibration data The date mm dd yyyy The Relative mV calibration offset The instrument ID or the number of days until the calibration alarm will be displayed or if expired 7 days ago The instrument ID ...

Page 26: ... data press GLP when the instrument is in EC measurement mode The instrument will display the time hh mm of the last calibration Use the ARROW key to scroll through the calibration data The date mm dd yyyy The calibration offset factor The EC calibration buffer The cell constant The temperature coefficient The instrument ID ...

Page 27: ...libration Use the ARROW key to scroll through the calibration data The date mm dd yyyy The salinity coefficient The cell constant The instrument ID Notes Ifnotemperaturecompensationisselectedduringcalibra tion the temperature coefficient is not displayed in GLP Press GLP at any moment and the instrument will return to measurement mode If calibration has not been performed on the selected range the...

Page 28: ...trument will display the current date on the primary LCD the record number on the secondary LCD LOG and Manual tags for a few seconds see example below record No 11 followed by the number of free records If there are less than 6 memory locations remaining the record number and Lo message will be displayed to alert the user If the log space is full 200 records FULL LOG message will be displayed and...

Page 29: ...omes stable after an unstable condition To stop interval logging press LOG key again The LOG tag will be cleared Note When pressing any key that is not active while lot logging is running the following message is displayed for a few seconds VIEW LOGGED DATA Press the ALT RCL keys while in measurement mode to retrieve the stored information If no data was logged for the current selected measurement...

Page 30: ...ntheprimaryLCD line the number of records on the secondary RCL tag and CFM blinking Ifsampleswereloggedondemand Manual willbedisplayed on the primary LCD and the number of samples logged on the secondary see example on the next page manual log 1 sample logged Press ARROW keys to select different lot No pH measurements records ...

Page 31: ...n TDS measurement range In NaCl measurement range Use the ARROW keys to scroll through the records Note The instrument will automatically skip log records from other measurement ranges for the manual log To view additional information press RANGE For pH The mV value on the primary LCD and the temperature value on the secondary LCD ...

Page 32: ... the primary LCD and SLP message on the secondary LCD The interval for lot logging To delete manual logged records press CFM while L and 0 are displayed to view manually logged records Press the CLR key dEL and the record number will be displayed Press CFM to delete Use the ARROW keys to change the record number To delete a lot use the ARROW keys to select the desired lot Press CLR key dEL Lot wil...

Page 33: ...s CFM to confirm delete While deleting the tag will blink Press CAL or RANGE or CLR to escape and return to the RCL screen If dEL ALL option was selected all the log on demand records or lots are deleted While deleting the tag is displayed blinking Press ALT RCL exit record information and enter lot information Press ALT RCL again to return to measurement mode If one or more records lots were dele...

Page 34: ...ormationthatdoesnotdisplaytherecordnumber is selected pressing the SETUP key will display the record number on the secondary LCD line The time and the date as described in pH Range The TDS factor on the primary LCD and the record number on the secondary LCD The temperature coefficient and the cell constant as described in EC Range For TDS Range The temperature reading as described in pH range The ...

Page 35: ... range Expired Calibration Alarm First Custom Buffer Second Custom Buffer One point Calibration Behavior pH Resolution In EC TDS NaCl range Cell Constant TDS Factor Temperature Compensation Coefficient Reference Temperature To enter SETUP mode press SETUP while the instrument is in mea surement mode Select a parameter with the ARROW keys Press CAL to change a parameter value The selected parameter...

Page 36: ...terval is displayed The log interval and CFM will start blinking LOG for log on demand StAb log on stability interval in seconds or minutes Press the ARROW keys to change the custom buffer value Press CFM to confirm the selection Press CAL to escape without saving FIRST CUSTOM BUFFER PressCALwhen Cust Buff 1 isdisplayed Thecustombuffer disabled no or 0 to 16 pH and CFM will start blinking Press th...

Page 37: ... return for the SETUP parameter scroll mode ONE POINT CALIBRATION BEHAVIOR PressCALwhen 1Pnt messageisdisplayedonthesecondaryLCD One ofthetwooptions Pnt or OFFS and CFM willstartblinking see pH CALIBRATION PROCEDURE for details page 13 Press the ARROW keys to toggle between Pnt and OFFS options Press CFM to save the behavior for one point calibration Press CAL to escape without saving pH RESOLUTIO...

Page 38: ...ear and CFM will start blinking Press the ARROW keys to change the year Press CFM to save the modified value Press CAL to escape without saving CURRENT TIME Press CAL when the current time is displayed The hour and CFM will start blinking Press the ARROW keys to change the hour Press RANGE The minutes and CFM will start blinking Press the ARROW keys to change the minutes Press CFM to save the modi...

Page 39: ...a wrong condition is detected while in calibration INSTRUMENT ID Press CAL when InId is displayed The instrument ID 0000 to 9999 and CFM will start blinking Press the ARROW keys to change the instrument ID value Press CFM to save the modified instrument ID value Press CAL to escape without saving Note The instrument ID is downloaded to a PC as part of a logged data set to identify its origin TEMPE...

Page 40: ...CFM will start blinking Press the ARROW keys to change the TDS factor 0 40 to 0 80 Press CFM to save the modified TDS factor Press CAL to escape without saving TEMPERATURE COMPENSATION COEFFICIENT Press CAL when the temperature compensation coefficient is displayed Thetemperaturecompensationcoefficient and CFM willstartblinking Press the ARROW keys to change the temperature compensation coefficien...

Page 41: ...mperature is displayed The reference temperature and CFM will start blinking Press the ARROW keys to toggle between 20 0 ºC and 25 0 ºC reference temperature value Press CFM to save the modified reference temperature value Press CAL to escape without saving ...

Page 42: ...ges Use a calibrated thermometer with a resolution of 0 1 ºC as a referencethermometer ConnecttheHI7662probetotheappropriate socket for the pH temperature channel or the HI76310 probe for the EC temperature channel With the instrument off press and hold down the CFM SETUP keys then power on the instrument to calibrate the pH temperature channel or RANGE keys and then power on the instrument to cal...

Page 43: ...he ARROW keys to set the reading on the secondary LCD to that of the hot water When the reading is stable and close to the selected calibration point the CFM tag will blink Press CFM to confirm The instrument will memorize calibration and restart in measurement mode Note If the reading is not close to the selected calibration point WRONG tag will blink Change the temperature probe or EC probe and ...

Page 44: ...er on the instrument The CAL tag will appear and the secondary LCD will show 0 0 mV Set 0 0 mV on the simulator Whenthereadingisstableandclosetotheselectedcalibrationpoint the CFM tag will blink Press CFM to confirm The secondary LCD will display 1800 mV Set 1800 0 mV on the simulator Whenthereadingisstableandclosetotheselectedcalibrationpoint the CFM tag will blink Press CFM to confirm The instru...

Page 45: ...nna Instruments HI92000 software please see the following instructions SENDING COMMANDS FROM PC It is also possible to remotely control the instrument with any terminal program Use a standard USB cable to connect the instrument to a PC starttheterminalprogramandsetthecommunicationoptionsasfollows 8 N 1 no flow control 9600 baud rate COMMAND TYPES To send a command to the instrument the scheme is c...

Page 46: ... in according with the current range pH mV and temperature reading on pH range mV and temperature reading on mV range RelmV absolutemVandtemperaturereadingon Rel mV range Conductivity and temperature reading on EC range TDS and temperature reading on TDS range NaCl and temperature reading on NaCl range The answer string contains Meter mode 2 chars 00 pH range 0 001 resolution 01 pH range 0 01 reso...

Page 47: ...xadecimal encoding 0x01 pH calibration available 0x02 Rel mV calibration available 0x04 EC calibration available 0x08 NaCl calibration available pH calibration data if available which contains the number of calibrated buffers 1 char the offset with sign and decimal point 7 chars the average of slopes with sign and decimal point 7 chars the calibration time yymmddhhmmss 12 chars buffers information...

Page 48: ...n 00 manual temperature compensation TC coefficient with sign and decimal point 4 chars calibrationtime yymmddhhmmss 12chars Na Cl Calibration data the number of calibrated data 1 char salinitycoefficient withsignanddecimalpoint 7 chars Cell constant with sign and decimal point 2 chars the calibration time 2 chars buffer information for each buffer ReferenceTemperaturewithanddecimalpoint 4 chars T...

Page 49: ... 5 chars ReferenceTemperature withsignanddecimalpoint 5 chars Temperature Compensation mode 1 char NSLx Requests the number of logged samples x P request for pH range M request for mV range E request for EC range N request for NaCl range T request for TDS range LODxnnn request the nnn record of the manual log on the x range LODxALLff groups all Log On Demand Records in frames of 8 records each for...

Page 50: ... 1 xxx 001 ff requestedframenumber firstframeislabeled01 Errors Err3 log on demand empty Err4 requested set parameter is not available Err5 command argument is wrong Err6 requested range not available Err7 meter in log mode Err8 is sent if instrument is not in measurement mode NAK 21 character is sent when the instrument receives an unknown or a corrupted command Note P request for pH range M requ...

Page 51: ...d with water During transport tiny bubbles of air may form inside the glass bulb affecting proper functioning of the electrode These bubbles can be removed by shaking down the electrode as you would do with a glass thermometer If the bulb and or junction is dry soak the electrode in HI70300 or HI80300 Storage Solution for at least one hour ELECTRODE CONDITIONING AND MAINTENANCE ...

Page 52: ...heECprobearecompletelysubmersed Tap the probe repeatedly to remove air bubbles that may be trapped inside the sleeve STORAGE PROCEDURE To minimize clogging and assuring a quick response time the glass bulb and the junction of pH electrode should be kept moist and not allowed to dry out Replace the solution in the protective cap with a few drops of HI70300 orHI80300StorageSolutionor initsabsence Fi...

Page 53: ...th Hanna Instruments HI7077 or HI8077 Oil and Fat Cleaning Solution IMPORTANT Afterperforminganyofthecleaningprocedures rinsethe electrode thoroughly with distilled water refill the reference chamber with fresh electrolyte not necessary for gel filled electrodes and soak the electrode in HI70300 or HI80300 Storage Solution for at least 1 hour before taking measurements EC Probe Maintenance Rinseth...

Page 54: ...ure the pH sample is in the specified range c Check the electrolyte level and the general state of the electrode If the display shows mV and 2000 or 2000 blinking Out of range in the mV scale Electrode not connected Verify that the electrode is connect The display shows EC TDS or NaCl reading blinking Out of range in EC TDS or NaCl scale Recalibrate the meter Make sure the solution is in specified...

Page 55: ...or the reading to stabilize if the resistance is higher In addition the responsetimewillsuffertoagreaterdegreeattemperaturesbelow25ºC Since the resistance of the pH electrode is in the range of 50 200Mohm thecurrentacrossthemembraneisinthepicoAmpererange Largecurrentscandisturbthecalibrationoftheelectrodeformanyhours For these reasons high humidity environments short circuits and static discharges...

Page 56: ...ved bottle 500 mL CLEANING SOLUTIONS HI7061M General Cleaning Solution 230 mL bottle HI7061L General Cleaning Solution 500 mL bottle HI8061M General Cleaning Solution 230 mL bottle FDA approved bottle HI8061L General Cleaning Solution 500mL bottle FDA approved bottle HI70000P Electrode Rinse Sachets 20 mL 25 pcs HI7073L Protein Cleaning Solution 500 mL HI7074L Inorganic Cleaning Solution 500 mL HI...

Page 57: ... mL bottle HI7039L 5000 µS cm µmho cm 500 mL bottle HI7037L 100 NaCl sea water standard solution 500 mL bottle HI8030L 12880µS cm µmho cm 500mLFDAapprovedbottle HI8031L 1413 µS cm µmho cm 500 mL FDA approved bottle HI8033L 84 µS cm µmho cm 500 mL FDA approved bottle HI8034L 80000µS cm µmho cm 500mLFDAapprovedbottle HI8035L 111800µS cm µmho cm 500mLFDAapprovedbottle HI8039L 5000 µS cm µmho cm 500 m...

Page 58: ...illable combination pH electrode Use strong acid alkali HI1053B Glass body triple ceramic conic shape refillable combination pH electrode Use emulsions HI1083B Glass body micro Viscolene non refillable combination pH electrode Use biotechnology micro titration HI1131B Glass body double junction refillable combination pH electrode Use general purpose ...

Page 59: ...gle junction refillable combination pH electrode Use flasks HI1230B Plastic body PES doublejunction gel filled combinationpHelectrode Use general field HI2031B Glass body semimicro conic refillable combination pH electrode Use semisolid products HI1332B Plastic body PES doublejunction refillable combinationpHelectrode Use general purpose ...

Page 60: ...illable combination pH electrode Use meat cheese FC210B Glass body doublejunction conic Viscolene non refillable combination pH electrode Use milk yogurt FC220B Glass body triple ceramic single junction refillable combination pH electrode Use food processing FC911B Plastic body PVDF double junction refillable with built in amplifier combination pH electrode Use very high humidity ...

Page 61: ...ass body refillable combination platinum ORP electrode Use titration HI3230B Plastic body PES gel filled combination platinum ORP electrode Use general purpose HI4430B Plastic body PES gel filled combination gold ORP electrode Use general purpose Consult the Hanna Instruments General Catalog for more electrodes with screw type or BNC connectors ...

Page 62: ...tage adapter from 240 VAC to 12 VDC UK plug HI710014 Voltageadapterfrom230VACto12VDC Australiaplug ChecktempC Pocket size thermometer range 50 0 to 150 0 ºC HI76404N Electrode holder HI8427 pH and ORP electrode simulator with 1 m 3 3 coaxial cable ending in female BNC connectors HI931001 pHandORPelectrodesimulatorwithLCDand1m 3 3 coaxial cable ending in female BNC connectors HI76310 Platinum4 ring...

Page 63: ...ature of the problem If the repair is not covered by the warranty you will be notified of the charges incurred If the instrument is to be returned to Hanna Instruments first obtain a Returned Goods Authorization number from the Technical Service department and then senditwithshippingcostsprepaid Whenshippinganyinstrument make sure it is properly packed for complete protection WARRANTY CERTIFICATIO...

Page 64: ...64 Printed in ROMANIA MAN2550 06 19 World Headquarters Hanna Instruments Inc Highland Industrial Park 584 Park East Drive Woonsocket RI 02895 USA www hannainst com ...

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