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Operation

inoLab pH/ION 735

38

4.5.2

Measuring the ion concentration

AutoRead

(drift control)

The AutoRead function (drift control) continually checks the stability of
the measurement signal. The stability has a considerable impact on the
reproducibility of measured values. The display of the measured pa-
rameter flashes until a stable measured value is available.

Criteria

The AutoRead criteria affect the reproducibility of the measured values.
The following criteria can be adjusted:

!

high

: highest reproducibility

!

medium

: medium reproducibility

!

low

: lowest reproducibility

Note

Increasing reproducibility also causes the response time to increase
until a measured value is evaluated as stable.

Temperature while

calibrating and

measuring

For precise ISE measurements the temperature difference between
measurement and calibration should not be greater that 2 K. Therefore,
adjust the temperature of the standard and measuring solutions ac-
cordingly. If the temperature difference is greater the

[TempErr]

warn-

ing appears in the measured value display.

4.5.3

Settings for ISE measurements

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

g

key shortly. After com-

pleting the settings, switch to the measured value display with

m

.

The following settings are possible for ISE measurements:

1

Perform the preparatory activities according to section 4.5.1.

2

Immerse the electrode in the test sample.

ISE

0.157

mg/l

25

°C

20.09.04 10:37

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Содержание inoLab pH/ION 735

Страница 1: ...inoLab pH ION 735 ba75449e02 03 2005 Operating manual pH ION meter pH ION 735...

Страница 2: ...arranty claim extends to restoring the instrument to readiness for use but not however to any further claim for damages Improper handling or unauthorized opening of the instrument invalidates any warr...

Страница 3: ...storage 21 4 3 2 System 21 4 4 pH value ORP voltage 23 4 4 1 General information 23 4 4 2 Measuring the pH value 24 4 4 3 Measuring the ORP voltage 25 4 4 4 Settings for pH and ORP measurements 25 4...

Страница 4: ...9 4 7 3 Operation with MultiLab pilot 69 4 8 Reset 70 4 8 1 Resetting the sensor settings 70 4 8 2 Resetting the system settings 71 5 Maintenance cleaning disposal 73 5 1 Maintenance 73 5 1 1 Exchangi...

Страница 5: ...ications The integrated printer enables to document measurements according to GLP requirements The proven MultiCal calibration procedures and the special AutoRead function support you in your work wit...

Страница 6: ...r ready for operation on line 4 Call up calibration procedure 5 Switch between measuring mode pH ORP and measuring mode ISE concentration 6 Transmit print displayed data 7 Switch the meter on off 8 Ca...

Страница 7: ...splay even in the darkness You can modify the display to meet your requirements in multiple ways 1 4 Socket field Connections 1 pH Ion electrode 2 Temperature probe 3 Reference electrode 4 RS 232 inte...

Страница 8: ...8 Warning Only connect sensors to the meter that cannot return any voltages or currents that are not allowed SELV and current circuit with current limiting Almost all sensors in particular WTW sensor...

Страница 9: ...ions The individual chapters of this operating manual use the following safe ty instruction to indicate various types of danger Warning indicates instructions that must be followed precisely in order...

Страница 10: ...t 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 instrument ba...

Страница 11: ...ays use the specified NiMH rechargeable batteries see chap ter 7 TECHNICAL DATA Using normal batteries can damage the meter Charging time of the batteries approx 36 hours The LoBat display indicator a...

Страница 12: ...ollowing activities For line powered operation and charging the batteries Connect the power pack see section 3 2 POWER SUPPLY Switch on the meter see section 4 1 Set the language see section 4 2 3 Set...

Страница 13: ...eriod The automatic switchoff is not active if the power is supplied by the power pack if the Autostore function is active or with automatic data transmis sion if the communication cable and a PC with...

Страница 14: ...tion 4 2 1 and section 4 2 2 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 Cali...

Страница 15: ...ngs and dialogs in courses contain further sub menus The selection is made with the 82 keys The current selec tion is displayed in reverse video Submenus The name of the submenu is displayed at the up...

Страница 16: ...tions 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...

Страница 17: ...g for a long time approx 1 s The instrument is in the setting mode 3 Select the System submenu with 82 The current selection is displayed in reverse video 4 Open the System submenu with g 5 Select the...

Страница 18: ...equired language with 82 9 Confirm the setting with g The setting becomes active the next time the system menu is called up Language Deutsch Beep Off Illumination On Contrast 48 Temperature unit C Swi...

Страница 19: ...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 the display of day m...

Страница 20: ...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 82 and g 9 To make further settings switch to the next higher menu...

Страница 21: ...eatures can be adjusted in the system menu System and its submenus Menu language Beep on keystroke Display illumination Display contrast Unit of the temperature display Interval of the automatic switc...

Страница 22: ...witches the meter off if no entry is made for a specified period of time switchoff interval This saves the batteries System Interface Baud rate 1200 2400 4800 9600 19200 Baud rate of the data inter fa...

Страница 23: ...ducible pH measurements it is essential 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...

Страница 24: ...ia With identical measurement conditions the following applies 1 Connect a pH or ORP electrode to the meter The pH ISE measuring window is displayed 2 If necessary select the pH or mV display with m 3...

Страница 25: ...er flashes until a stable measured value is available Criteria With identical measurement conditions the following applies 4 4 4 Settings for pH and ORP measurements Overview The following settings ar...

Страница 26: ...gularly by the flashing sensor symbol in the measuring window Calibration Cal type TEC NIST DIN ConCal Buffer sets to be used for pH calibration For details see section 4 4 5 Calibration Unit for slop...

Страница 27: ...n 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 fo...

Страница 28: ...bol first Then you can decide whether you want to take over these values of the new calibration or whether you want to continue measuring with the old calibration data After accepting the new calibrat...

Страница 29: ...n record 31 08 04 16 13 inoLab pH ION 735 Ser no 12345678 CALIBRATION pH Calibration date 01 08 04 00 14 03 Cal interval 7 d AutoCal TEC Buffer 1 7 00 Voltage 1 0 2 mV 26 3 C Slope 59 2 mV pH Asymmetr...

Страница 30: ...ibration 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 solutions are given...

Страница 31: ...th 82 and confirm with g 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 va...

Страница 32: ...libration value with g The calibration display for the next buffer appears 13 For two point calibration select Exit with 2 point calibration with 82 and confirm with g The calibration is completed as...

Страница 33: ...e buffer is mea sured 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 g The new calibra...

Страница 34: ...sured value display select the pH or mV measuring window with 82 and m 2 Start the calibration with c The calibration display appears 3 Thoroughly rinse the electrode with distilled water 4 Immerse th...

Страница 35: ...n with 82 and confirm with g 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 calibratio...

Страница 36: ...Continue with 82 and press g The buffer is mea sured The measured value is checked for stability AutoRead 15 Wait for the end of the AutoRead measurement or Terminate AutoRead and accept the calibrati...

Страница 37: ...ernal temperature sensor Manual determination and input of the temperature The display of the temperature indicates the active temperature mea suring mode Preparatory activities Perform the following...

Страница 38: ...valuated as stable Temperature while calibrating and measuring For precise ISE measurements the temperature difference between measurement and calibration should not be greater that 2 K Therefore adju...

Страница 39: ...ad criterion low medium high Selection of AutoRead cri teria see section 4 5 2 ISE setup Unit mg l mol l mg kg ppm Selection with which unit the result will be displayed Method Std add Std add Std sub...

Страница 40: ...while cali brating and measuring For precise ISE measurements the temperature difference between measurement and calibration should not be greater that 2 K Therefore adjust the temperature of the sta...

Страница 41: ...alibration data and output to interface You can have the data of the last calibration displayed see section 4 6 5 Subsequently you can transmit the displayed calibra tion data to the interface e g to...

Страница 42: ...tart the calibration with c 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 43: ...the electrode with distilled water 10 Immerse the electrode in standard solution 2 11 Select the Set standard setting with 82 and press g 12 Set the concentration of the standard solution with 82 and...

Страница 44: ...Wait for the end of the AutoRead measurement or accept the calibration value with g The calibration display for the next standard solution appears 15 For two point calibration select Exit with 2 point...

Страница 45: ...select the ISE measuring win dow with m 3 Open the ISE menu with g 4 Thoroughly rinse the electrode with distilled water 5 Adjust the temperature of the standard solutions 6 Select Method with 82 and...

Страница 46: ...he second standard calibration solution the slope mV and evaluation of the electrode after calibration is displayed i Slope 33 6 mV i Sensor Accept ISE CAL 5 Start the measurement with g An entry wind...

Страница 47: ...13 Select Continue with 82 and confirm with g The measurement result is displayed 14 If necessary start measuring further samples with g Repeat steps 6 13 for all samples 15 Terminate the measuring m...

Страница 48: ...s soon as a stable value is achieved for the second standard calibration solution the slope mV and evaluation of the electrode after calibration is displayed i Slope 33 6 mV i Sensor Accept ISE CAL 5...

Страница 49: ...entration of the stan dard solution Std concentration 13 If the info line indicates an incorrect selection for the ion sensi tive electrode e g Ag ISE and the ion to be subtracted e g Ag Sub Select Io...

Страница 50: ...nt data Valency and Molar mass is displayed auto matically With selection of the ion type that can be defined Using 82 and g set the valence Valency and molar weight Molar mass for the ion in the stan...

Страница 51: ...lope mV and evaluation of the electrode after calibration is displayed i Slope 33 6 mV i Sensor Accept ISE CAL 5 Start the measurement with g An entry window appears 6 Thoroughly rinse the electrode w...

Страница 52: ...irm Continue with 82 and g The measurement result is displayed 14 If necessary start measuring further samples with g Repeat steps 6 13 for all samples 15 Terminate the measuring method with A securit...

Страница 53: ...nt calibration according to the user guidance 4 As soon as a stable value is achieved for the second standard calibration solution the slope mV and evaluation of the electrode after calibration is dis...

Страница 54: ...be subtracted 12 Using 82 and g enter the value for the volume of the sam ple Sample volume 13 If the info line indicates an incorrect selection for the ion sensi tive electrode e g Ag ISE and the ion...

Страница 55: ...ant data Valency and Molar mass is displayed auto matically With selection of the ion type that can be defined Using 82 and g set the valence Valency and molar weight Molar mass for the ion in the sta...

Страница 56: ...ect the measuring method see section 4 5 5 2 Prepare two standard calibration solutions 3 Perform a two point calibration according to the user guidance 4 As soon as a stable value is achieved for the...

Страница 57: ...ion to the sample 11 Start the measurement with g When the measurement is finished an entry window appears 12 Using 82 and g enter the values for the volume of the standard solution Std volume and con...

Страница 58: ...f the connected sensor Measured temperature value of the connected sensor AutoRead info AR appears with the measured value if the Auto Read criterion was met while storing stable measured value Oth er...

Страница 59: ...o cancel the storage process and switch to the measured value display confirm No Then you can e g transmit the stored data to a PC see section 4 6 3 and subsequently erase the storage see section 4 6...

Страница 60: ...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 30...

Страница 61: ...s bar in the status line The progress bar indicates how much of the adjusted storage duration has already expired Note The automatic storage function is interrupted if you start other func tions e g o...

Страница 62: ...has a separate erasure 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 syste...

Страница 63: ...rface 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 premature...

Страница 64: ...filter switched off Date ID 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 withi...

Страница 65: ...alue storage How to erase the measured value storage is described in section 4 6 3 EDITING THE MEASURED VALUE STORAGE 31 08 04 15 48 08 inoLab pH ION 735 Ser no 12345678 ID number 1 ISE 0 316 mg l 22...

Страница 66: ...calibra 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 sys...

Страница 67: ...terval 7d AutoCal TEC Buffer 1 7 00 Voltage 1 0 2 mV 26 3 C Slope 59 2 mV pH Asymmetry 0 5 mV Sensor ________________________________________ CALIBRATION ISE Calibration date 03 08 04 20 17 24 Standar...

Страница 68: ...By pressing p shortly Simultaneously with every manual storage process see section 4 6 1 Automatic at intervals By pressing p for a long time Then you can set the transmission interval Simultaneously...

Страница 69: ...following transmission data on the PC printer Socket assignment 4 7 3 Operation with MultiLab pilot With the aid of the MultiLab pilot software you can record and evaluate measuring data with a PC The...

Страница 70: ...rforming a reset pH The following settings for pH measurements are reset to the default settings with the Reset function The sensor settings are reset under the Reset menu item in the respec tive meas...

Страница 71: ...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 g key for approx 1 s Setting Default settings Languag...

Страница 72: ...Operation inoLab pH ION 735 72...

Страница 73: ...73 5 Maintenance cleaning disposal 5 1 Maintenance The only maintenance activities are exchanging the rechargeable batteries and exchanging the roll of printer paper Note For maintenance of the elect...

Страница 74: ...teries are the right way round The signs on the batteries must correspond to the signs in the bat tery compartment Use leakproof NiMH rechargeable batteries only 1 Open the battery compartment 1 on th...

Страница 75: ...a damp lint free cloth Disinfect the housing with isopropanol as required Warning The housing components are made out of synthetic materials polyurethane ABS and PMMA Thus avoid contact with acetone...

Страница 76: ...ry from the instrument and dispose of it at a suitable facility according to local legal requirements It is illegal to dispose of the rechargeable batteries with household refuse Proceed as follows to...

Страница 77: ...value 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 electrol...

Страница 78: ...essary 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 Conn...

Страница 79: ...ug Electrode obsolete Replace electrode Electrode unsuitable for the range to be measured Use suitable electrode Socket damp Dry socket Calibration procedure Wrong sequence of standards for three poin...

Страница 80: ...ed Unplug cable No paper available Replace roll of paper AutoStore function is switched on with a longer interval duration Int 1 Switch off AutoStore function only on the inoLab pH ION 735 with integr...

Страница 81: ...play 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 re...

Страница 82: ...What to do if inoLab pH ION 735 82...

Страница 83: ...rging device FRIWO FW7555M 09 15 1432 500 00 Friwo Part No 1883259 Input 100 240 V 50 60 Hz 400 mA Output 9 V 1 5 A Connection max overvoltage category II Primary plugs contained in the scope of de li...

Страница 84: ...rement 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...

Страница 85: ...Abbreviations 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 specia...

Страница 86: ...rature unit 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 LoBat Batteries almo...

Страница 87: ...xchange more difficult The ex pression junction is also used for ground or junction less transitions Electrode zero point The zero point of a pH electrode is the pH value at which the electro motive f...

Страница 88: ...n function Slope relative Designation used by WTW in the DO measuring technique It ex presses the relationship of the slope value to the value of a theoretical reference sensor of the same type of con...

Страница 89: ...tion measuring parameters 70 system settings 71 Display 7 Display illumination 7 12 13 Drift control ISE 38 ORP 25 pH 24 E Exchanging the batteries 74 Exchanging the roll of paper 75 F Filter 64 Firmw...

Страница 90: ...alibration pH 31 34 Slope ISE 40 pH 27 Socket field 7 Standard addition 46 Standard addition with blank value correction 56 Standard subtraction 48 Status line 7 Storage 58 at intervals 60 automatic 6...

Страница 91: ...over the new software version on the start display 1 Start the installation program In the Windows start menu the WTW update inoLab pH_ION 735 program directory is created 2 Connect the inoLab pH ION...

Страница 92: ...Appendix Updating the meter software inoLab pH ION 735 92...

Страница 93: ...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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