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Contents

Multi 350i

4.7

Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.7.1

General information . . . . . . . . . . . . . . . . . . . . . . 58

4.7.2

Measuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

4.7.3

Temperature compensation . . . . . . . . . . . . . . . . 60

4.7.4

Settings for conductivity measuring cells . . . . . . 61

4.7.5

Determining the cell constant (calibration in the
control standard) . . . . . . . . . . . . . . . . . . . . . . . . 63

4.8

Data storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
4.8.1

Manual data storage . . . . . . . . . . . . . . . . . . . . . 67

4.8.2

Automatic data storage at intervals . . . . . . . . . . 68

4.8.3

Editing the measured value storage . . . . . . . . . 70

4.8.4

Erasing the measured value storage . . . . . . . . . 73

4.8.5

Displaying and outputting calibration records . . 74

4.9

Transmitting data (RS 232 interface) . . . . . . . . . . . . . . . 76
4.9.1

Options for data transmission . . . . . . . . . . . . . . 76

4.9.2

Connecting a PC/external printer . . . . . . . . . . . . 77

4.9.3

Operation with MultiLab pilot . . . . . . . . . . . . . . . 77

4.10 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

4.10.1 Resetting the sensor settings . . . . . . . . . . . . . . 78
4.10.2 Resetting the system settings . . . . . . . . . . . . . . 79

Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 81

5.1

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

5.2

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

5.3

Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6.1

pH and ORP measurement . . . . . . . . . . . . . . . . . . . . . . 83

6.2

ISE measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

6.3

DO measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

6.4

Conductivity measurement . . . . . . . . . . . . . . . . . . . . . . . 87

6.5

General errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

7.1

General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

7.2

Measuring ranges, resolution, accuracy . . . . . . . . . . . . . 91
7.2.1

pH/ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

7.2.2

ISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

7.2.3

Dissolved oxygen . . . . . . . . . . . . . . . . . . . . . . . . 92

7.2.4

Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Appendix: Firmware Update . . . . . . . . . . . . . . . . . . . . . . . 103

Summary of Contents for Multi 350i

Page 1: ...Multi 350i Operating manual ESC STO PRT CAL M O pH ISE DO conductivity measuring instrument For Sales Service Contact 2650 E 40th Ave Denver CO 80205 Phone 303 320 4764 Fax 303 322 7242 1 800 833 7958...

Page 2: ...the data figures or descriptions Currentness of firmware The process of consistently improving our products includes the continuous further development of instrument firmware The current Multi 350i f...

Page 3: ...etting the date and time 19 4 3 System settings system menu 21 4 3 1 Data storage 21 4 3 2 Display 21 4 3 3 System 23 4 4 pH value ORP voltage 25 4 4 1 General information 25 4 4 2 Measuring the pH va...

Page 4: ...smitting data RS 232 interface 76 4 9 1 Options for data transmission 76 4 9 2 Connecting a PC external printer 77 4 9 3 Operation with MultiLab pilot 77 4 10 Reset 78 4 10 1 Resetting the sensor sett...

Page 5: ...ing certainty for all applications The proven MultiCal and OxiCal calibration procedures and the pro cedures to determine set up the cell constant support you in your work with the meter The special A...

Page 6: ...t The measuring instrument is also available as part of individual SETs of equipment You will find additional information on this and other accessories in the WTW catalog or via the Internet 1 2 4 5 1...

Page 7: ...uffer solution STP 7 9 Calibration and control standard for conductivity measuring cells 50 ml 10 50 ml ELY G electrolyte solution for DO sensors 11 50 ml RL G cleaning solution for DO sensors 12 Exch...

Page 8: ...ial pressure Conductivity specific resistance salinity TDS Output display contents to RS232 interface e g print PRT Switch the measuring instrument on off ON OFF Calibrate the currently selected measu...

Page 9: ...quirements in multiple ways 1 5 Socket field 1 DO sensor or conductivity measuring cell or combined con ductivity DO sensor 2 pH electrode or ISE combination electrode 3 pH temperature sensor 4 Plug i...

Page 10: ...Overview Multi 350i 8...

Page 11: ...operating manual use the following safe ty instruction to indicate various types of danger Caution indicates instructions that must be followed precisely in order to avoid the possibility of slight i...

Page 12: ...nment the formation of condensate can lead to the faulty func tioning of the instrument In this event wait until the temperature of the instrument reaches room temperature before putting the instrumen...

Page 13: ...36 hours The LoBat display indicator appears when the batter ies are nearly empty and have to be charged as soon as possible Caution The line voltage at the operating site must lie within the input v...

Page 14: ...e date and time see section 4 2 4 Note When you set the language date and time according to the mentioned sections of this operating manual you will quickly be familiar with the simple operation of th...

Page 15: ...le period The automatic switchoff is not active if the power is supplied by the plug in power supply unit if the Automatic data storage function is active or with automatic data transmission if the co...

Page 16: ...4 2 1 Operating modes The instrument has the following operating modes Measuring The measuring data of one to three sensors is displayed in the measured value display Calibration The course of a cali...

Page 17: ...d dialogs in courses contain further sub menus The selection is made with the keys The current se lection is displayed in reverse video Submenus The name of the submenu is displayed at the upper edge...

Page 18: ...ns are designated by the i symbol They cannot be selected Example Note The principles of navigation are explained in the two following sections by reference of examples Set the language see section 4...

Page 19: ...essing MENU ENTER for a long time approx 1 s The instrument is in the setting mode 3 Select the System submenu with The current selection is displayed in reverse video 4 Open the System submenu with M...

Page 20: ...s active the next time the system menu is called up 10 To make further settings switch to the next higher menu level with ESC or Switch to the measured value display with M The instrument is in the me...

Page 21: ...ar intervals Note After a fall of the supply voltage empty batteries the date and time are reset to 01 01 2003 00 00 hours Setting the date time and date format The data format can be switched from th...

Page 22: ...NU ENTER The time is set 7 If necessary set the Date and Date format The setting is made similarly to that of the time 8 If necessary select and set the Date with and MENU ENTER 9 To make further sett...

Page 23: ...i is given in section 4 8 4 3 2 Display With the aid of Display submenu you can modify the measured value display to meet your requirements When doing so you can display or hide the following elements...

Page 24: ...em status line Display Date On Off Display of the date in the system status line Display pH On Off Display of the pH ISE measuring window This menu item is only visible if the electrode and an additio...

Page 25: ...ing the settings switch to the measured value display with M Menu item Setting Description System General Language Deutsch English further Select the menu language System General Beep On Off Switch on...

Page 26: ...data trans mission For details see section 4 9 System Interface Header Yes No Option for output in csv for mat Yes creates a header in the table System Clock func tion Time Date Date format Settings o...

Page 27: ...ssential to measure the tem perature of the test sample You have the following possibilities of measuring the temperature Automatic measurement of the temperature by the temperature sen sor NTC30 or P...

Page 28: ...pH Cond or Oxi yes 0 1 C Automatic with pH tem perature sensor yes yes 0 1 C 1 C Manual yes 0 1 C measured temperature value flashes The temperature value of the second sensor Cond or Oxi in the same...

Page 29: ...lity of measured values The display of the measured vari able flashes until a stable measured value is available Criteria With identical measurement conditions the following applies 1 Perform the prep...

Page 30: ...ability has a considerable impact on the reproducibility of measured values The display of the measured vari able flashes until a stable measured value is available Criteria With identical measurement...

Page 31: ...1 999 d Calibration interval for the pH elec trode in days The measuring instrument reminds you to calibrate regularly by the flashing sensor symbol in the mea suring window Calibration Calibration t...

Page 32: ...on interval has expired after a voltage interruption empty batteries Buffer sets for calibration You can use the buffer sets quoted in the table for an automatic calibra tion The pH values are valid f...

Page 33: ...terminated at any time accepting the current value Calibration record When finishing a calibration the new calibration values are displayed as an informative message i symbol first Then you can decide...

Page 34: ...terface e g to a printer or PC with the PRT key Note The calibration record is automatically transmitted to the interface after calibrating Sample record 03 11 03 07 14 CALIBRATION pH 03 11 03 07 10 4...

Page 35: ...s when you want to calibrate Display Calibration record Asymmetry mV Slope mV pH 15 15 60 5 58 20 20 58 57 25 25 61 60 5 or 57 56 30 30 62 61 or 56 50 Clean the electrode according to the electrode op...

Page 36: ...te The TEC calibration for pH 10 01 is optimized for the WTW technical buffer solution TEP 10 Trace or TPL 10 Trace Other buffer solutions can lead to an erroneous calibration The correct buffer solut...

Page 37: ...ingle point calibration The new calibration values are displayed as a message i You have the following options Accept the new calibration values with MENU ENTER Subsequently the calibration record is...

Page 38: ...alue with MENU ENTER The calibration display for the next buffer appears 13 For two point calibration select Exit with 2 point calibration with and confirm with MENU ENTER The calibration is completed...

Page 39: ...red The measured value is checked for stability AutoRead 18 Wait for the end of the AutoRead measurement or Terminate AutoRead and accept the calibration value with MENU ENTER The new calibration valu...

Page 40: ...value display select the pH or mV measuring window with and M 2 Start the calibration with CAL The calibration display appears 3 Thoroughly rinse the electrode with distilled water 4 Immerse the elec...

Page 41: ...nd confirm with MENU ENTER The calibration is completed as a single point calibration The new calibration values are displayed as a message i You have the following options Accept the new calibration...

Page 42: ...ue with and press MENU ENTER The buffer is measured The measured value is checked for stability AutoRead 15 Wait for the end of the AutoRead measurement or Terminate AutoRead and accept the calibratio...

Page 43: ...s of measuring the temperature Measurement of the temperature by the integrated temperature sen sor of a simultaneously connected DO sensor or conductivity mea suring cell in the test sample Manual de...

Page 44: ...Criteria With identical measurement conditions the following applies Temperature while cali brating and measuring For precise ISE measurements the temperature difference between measurement and calibr...

Page 45: ...play with M 4 5 4 Calibrating for ISE measurements Why calibrate Ion selective electrodes age and are temperature dependent This changes the slope As a result an inexact measured value is displayed Ca...

Page 46: ...t uses 2 or 3 freely selectable standard solutions The concen tration expected in the measurement determines the concentration of the calibration standards AutoRead In calibration the AutoRead functio...

Page 47: ...omatically evaluates the calibration 03 11 03 07 14 CALIBRATION ISE 03 11 03 07 12 01 Multi 350i ser no 12345678 Standard 1 0 010 mg l Standard 2 0 020 mg l Voltage 1 0 0 mV 24 0 C Voltage 2 9 0 mV 24...

Page 48: ...art the calibration with CAL The calibration display appears 3 Thoroughly rinse the electrode with distilled water 4 Immerse the electrode in standard solution 1 5 Select the Set standard setting with...

Page 49: ...0 mg l ISE CAL 12 Thoroughly rinse the electrode with distilled water 13 Immerse the electrode in standard solution 2 14 Select the Set standard setting with and press MENU ENTER 15 Set the concentrat...

Page 50: ...ibration value with MENU ENTER The calibration display for the next standard solution appears 21 For two point calibration select Exit with 2 point calibration with and confirm with MENU ENTER The cal...

Page 51: ...auses the measuring in strument to automatically change to the next higher measuring range and back again Therefore the instrument always measures in the measuring range with the highest possible reso...

Page 52: ...on is required For this you have to measure and input the salinity of the measured medium first When the salinity correction is switched on the SAL indicator is displayed in the measuring window Note...

Page 53: ...ty has a considerable impact on the reproducibility of measured values The display of the measured vari able flashes until a stable measured value is available Criteria With identical measurement cond...

Page 54: ...ow Calibration Com parison meas On Off Enables to adjust the mea sured value with the aid of a comparison measurement e g Winkler titration For details see section 4 6 4 Calibration Cali bration recor...

Page 55: ...alibration procedures Calibration in water vapor saturated air Use an OxiCal air calibration vessel for the calibration Calibration via a comparison measurement e g Winkler titration ac cording to DIN...

Page 56: ...relative slope has no effect on the measuring accuracy Low values indicate that the electro lyte will soon be depleted and the sensor will have to be regenerated 03 11 03 07 14 CALIBRATION ConOx 03 11...

Page 57: ...t the DO sensor to the measuring instrument 3 In the measured value display select the DO measuring win dow with and M 4 Start the calibration with CAL The calibration display for the relevant sensor...

Page 58: ...calibration values with MENU ENTER Subsequently the calibration record is displayed and output to the interface at the same time To switch to the measured value display without accepting the new cali...

Page 59: ...rrection factor to adjust the dis played concentration value to the nominal value value of the comparison measurement Subsequently accept the correc tion factor with MENU ENTER 9 Select Accept with an...

Page 60: ...available Temperature measurement The TetraCon 325 ConOx LR 325 01 and LR 325 001 conductivity measuring cells have an integrated temperature sensor Caution When connecting an earthed PC printer meas...

Page 61: ...fac tory You can adjust this factor to meet your requirements in the range of 0 40 to 1 00 The factor can be set in the TDS measuring menu AutoRead criterion The measuring instrument checks the stabi...

Page 62: ...000 K No temperature compensation off Note The reference temperature and temperature compensation are set in the conductivity measuring menu see section 4 7 4 Application tips Select the following te...

Page 63: ...s play with M Menu item Possible setting Description Calibration Calibra tion interval 1 999 d Calibration interval for the measuring cell in days The measuring instrument re minds you to calibrate re...

Page 64: ...s displayed in the status line LR325 001 LR 325 001 measuring cell nominal cell constant 0 010 cm 1 The cell constant is perma nently set LR325 01 LR 325 01 measuring cell nominal cell constant 0 100...

Page 65: ...0 800 1 200 cm 1 cells with a cell constant of approx 1 The cell constant is determined in the control standard 0 01 mol l KCl Cell constants outside the ranges quoted above cannot be calibrated In th...

Page 66: ...play Calibration record Cell constant cm 1 within the ranges 0 450 0 500 cm 1 or 0 800 1 200 cm 1 Error Error outside the ranges 0 450 0 500 cm 1 or 0 800 1 200 cm 1 Perform error elimination ac cordi...

Page 67: ...ant is displayed as a message i 7 You have the following options Accept the new calibration values with MENU ENTER Subsequently the calibration record is displayed and output to the interface at the s...

Page 68: ...number Measured values of the connected sensors Temperature values of the sensors connected AutoRead info AR appears with the measured value if the Auto Read criterion was met while storing stable mea...

Page 69: ...process and switch to the measured val ue display confirm No Then you can e g transmit the stored data to a PC see section 4 8 3 and subsequently erase the data storage see section 4 8 4 1 Press the...

Page 70: ...ore with ID no 1 Interval 30 s Duration 180 min Continue 00d03h00min 00d15h 34 min STO_ Menu item Possible setting Description Store with ID no 1 999 ID number for the dataset series Interval 5 s 10 s...

Page 71: ...d from the progress bar in the status line The progress bar indicates how much of the adjusted storage duration has already expired Note The automatic data storage function is interrupted if you start...

Page 72: ...ure function for the entire contents independent of the filter settings Editing the data storage The storage can be edited in the system menu submenu Data storage To open the system menu in the measur...

Page 73: ...all measuring datasets that correspond to the filter set tings The output takes place in ascending order of the ID number The process can take sev eral minutes To terminate the process prematurely pr...

Page 74: ...number Selection according to pe riod and ID number ID number Selection according to ID number Date Selection according to pe riod From TT MM JJ Selects all datasets within the specified period Until...

Page 75: ...48 08 Multi 350i ser no 12345678 ID number 1 ISE 0 316 mg l 22 C AR Oxi 6 32 mg l 24 8 C AR Sal 0 7 Cond 1413 uS cm 24 8 C C 0 975 1 cm Tref25 Lin TC 2 000 K ________________________________________...

Page 76: ...tion records of all sensors connected The calibration records of the last calibration can be found under the Data storage Calibration data storage menu item in the system menu To open the system menu...

Page 77: ...er 1 4 01 Buffer 2 7 00 Buffer 3 10 01 Voltage 1 184 0 mV 24 0 C Voltage 2 0 0 mV 24 0 C Voltage 3 177 0 mV 24 0 C Slope 60 2 mV pH Asymmetry 3 0 mV Sensor 03 11 03 07 14 CALIBRATION ISE 03 11 03 07 1...

Page 78: ...data storage pro cess see section 4 8 1 Automatic at intervals By pressing PRT for a long time Then you can set the transmission inter val Simultaneously with every automatic data storage process see...

Page 79: ...s would result Set up the following transmission data on the PC printer Socket assignment 4 9 3 Operation with MultiLab pilot With the aid of the MultiLab pilot software you can record and evaluate me...

Page 80: ...ttings for pH measurements are reset to the default settings with the Reset function Oxi The following settings for DO measurements are reset to the default settings with the Reset function Setting De...

Page 81: ...reset to the delivery status The system settings are reset under the System Reset menu item in the system menu To open the system menu in the measured value dis play press the MENU ENTER key for appr...

Page 82: ...Operation Multi 350i 80...

Page 83: ...with acetone and similar detergents that contain solvents Remove any splashes immediately 5 3 Disposal Packing This measuring instrument is sent out in a protective transport packing We recommend Kee...

Page 84: ...the measuring instrument without the rechargeable batter ies as electronic waste at an appropriate collection point 1 Open the housing Undo the four screws on the underside of the instrument Open the...

Page 85: ...e lies outside the measuring range not possible Cause Remedy Electrode Diaphragm contaminated Clean diaphragm Membrane contaminated Clean membrane Moisture in the plug Dry plug Not enough electrolyte...

Page 86: ...ary Electrode test sample Conductivity too low Use suitable electrode Temperature too high Use suitable electrode Organic liquids Use suitable electrode Cause Remedy pH electrode Not connected Connect...

Page 87: ...ug Electrode obsolete Replace electrode Electrode unsuitable for the range to be measured Use a suitable electrode Socket damp Dry socket Calibration procedure Wrong sequence of standards for three po...

Page 88: ...ble broken Replace sensor Cause Remedy Measuring range exceeded not possible Cause Remedy DO sensor Electrolyte solution depleted Regenerate sensor Membrane contaminated Clean membrane Electrode syste...

Page 89: ...p on the membrane with high velocity Avoid direct flow to the membrane The carbon dioxide pressure is too high 1 bar Measuring not possible Cause Remedy Calibration interval expired Recalibrate the me...

Page 90: ...splay LoBat Instrument does not react to keystroke Cause Remedy Batteries almost empty Charge the batteries see section 3 2 Cause Remedy Operating condition undefined or EMC load unallowed Processor r...

Page 91: ...es 4 x 1 2 V nickel metal hydride NiMH type AA Operational life up to 500 h with one battery charging Plug in power supply charging device FRIWO FW7555M 09 15 1432 500 00 Friwo Part No 1883259 Input 1...

Page 92: ...lass A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial enviro...

Page 93: ...ent Tmanual C 20 130 1 Accuracy 1 digit Variable Accuracy Temperature of the test sample pH 0 004 15 C 35 C U mV range 999 9 999 9 0 2 15 C 35 C 2000 2000 1 15 C 35 C T C temperature sensor NTC 30 0 2...

Page 94: ...0 1250 0 1 1 1 T C 0 50 0 0 1 Accuracy 1 digit Variable Accuracy DO concentration mg l 0 5 of measured value at ambient temperature 5 C 30 C Saturation 0 5 of measured value when measuring in the ran...

Page 95: ...20 00 0 0 200 0 0 2000 0 01 0 1 1 SAL 0 0 70 0 according to the IOT table 0 1 TDS mg l 0 2000 Factor can be set be tween 0 40 and 1 00 1 T C 5 0 105 0 0 1 only possible with cells of the cell constant...

Page 96: ...perature compensation None Off 0 5 Nonlinear nLF 0 5 0 C 35 C according to EN 27 888 0 5 35 C 50 C Extended nLF function according to WTW mea surements Linear lin 0 5 10 C 75 C SAL range 0 0 42 0 0 1...

Page 97: ...reviations The list of abbreviations explains the indicators and abbreviations that appear on the display and in the manual Specialist terms The glossary briefly explains the meaning of the specialist...

Page 98: ...nit degrees Celsius Cal Calibration ConCal Conventional single point or two point calibration for pH measurements d Day F Temperature unit degrees Fahrenheit h Hour j Year Lin Linear temperature compe...

Page 99: ...Multi 350i Lists 97 TDS Total Dissolved Solids Tr20 Reference temperature of 20 C Tr25 Reference temperature of 25 C UFL Display range undercut underflow U Voltage...

Page 100: ...conductivity It is a measured value of the ability of a substance to conduct an electric cur rent In water analysis the electrical conductivity is a dimension for the ionized substances in a solution...

Page 101: ...nces dissolved in water if these substances become effective on an electrode surface e g a gold or platinum surface OxiCal WTW name for a procedure to calibrate DO measuring systems in wa ter vapor sa...

Page 102: ...r potentiometric measurements the slope value is adjusted to the tem perature of the test sample but the measured value is not converted Slope The slope of a linear calibration function Slope relative...

Page 103: ...er 77 Connecting a sensor 7 Control standard of conductivity 63 D Data filter 72 Dataset 66 Date and time 19 Delivery condition measuring parameters 78 system settings 79 Display 7 Display illuminatio...

Page 104: ...lope ISE 43 pH 30 relative DO sensor 53 Socket field 7 Status line 7 Storage 66 at intervals 68 automatic 68 Storage administration 69 Storage interval 68 Storage of measured values storage locations...

Page 105: ...side of the status bar at the bot tom edge of the window Via the Language menu you can change the language Firmware update Gehen Sie wie folgt vor After switching Off On you can check whether the new...

Page 106: ...Appendix Firmware Update Multi 350i 104...

Page 107: ......

Page 108: ...Wissenschaftlich Technische Werkst tten GmbH Dr Karl Slevogt Stra e 1 D 82362 Weilheim Germany Tel 49 0 881 183 0 49 0 881 183 100 Fax 49 0 881 183 420 E Mail Info WTW com Internet http www WTW com...

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