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Multi 350i

Operation

4.4.4

Settings for pH and ORP measurements

Overview

The following settings are possible for pH and ORP measurements:

Resolution

Calibration interval

Buffers for calibration

Unit for slope

Calibration record

(display)

Settings

The settings are made in the measuring menu of the pH/ORP measure-
ment. To open the settings, activate the relevant measuring window in
the measured value display and press the

<MENU/ENTER>

key short-

ly. After completing the settings, switch to the measured value display
with

<M>

Menu item

Possible
setting

Description

Calibration

Calibration inter-
val

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 type

TEC
NIST/DIN
ConCal

Buffer sets to be used for pH cali-
bration.
For details, see section 4.4.5.

Calibration

Unit

for slope

mV/pH
%

Unit of the slope.
The % display refers to the Nernst
slope of
-59.16 mV/pH (100 x determined
slope/Nernst slope).

Calibration

Calibration
record

Displays the calibration record of
the last calibration.

Man. tempera-
ture

-20 ...
+130 °C

Entry of the manually determined
temperature. For measurements
without temperature sensor only.

Reset

Resets all sensor settings to the
delivery condition (see
section 4.10.1).

High resolution

On
Off

Resolution of the pH display:

= 0.001

Off

= 0.01

Содержание Multi 350i

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ________________________________________...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 107: ......

Страница 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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