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Operation

Multi 197i

36

ba75339e04

07/2009

4.5

Conductivity

4.5.1

General information

Note

Conductivity measurements with the Multi 197i can only be carried out
using measuring cells with a cell constant between 0.450 cm

-1

and

0.500 cm

-1

(example: TetraCon 325 or TA 197 LF).

Warning

When connecting an earthed PC/printer, measurements cannot be per-
formed in earthed media as incorrect values would result.
The RS232 interface is not galvanically isolated.

The measuring instrument is supplied with the following functions:

z

AutoRange (automatic switchover of the measurement range). If a
measuring range is exceeded, AutoRange causes the measuring in-
strument to change automatically to the next higher measuring
range and back again. Therefore, the instrument always measures
in the measuring range with the highest possible resolution.

z

The AutoRead function (drift control) for checking the stability of the
measurement signal. This ensures the reproducibility of the measur-
ing signal. For details of how to switch the AutoRead function on/off,
see page 39.

Preparatory activities

Perform the following preparatory activities when you want to measure:

Temperature sensor

The TetraCon 325 and TA 197 LF conductivity measuring cells have a
temperature sensor integrated in them. The temperature sensor is
shown on the display by

TP

.

1

Connect a conductivity measuring cell to the measuring instru-
ment. If the conductivity measuring cell is connected to the ac-
tive

REL

socket, press the

<M>

key repeatedly (if necessary)

until the status display

appears. If the conductivity measur-

ing cell is connected to the inactive

REL

socket, press the

<M>

key for 2 s until the status display

appears.

2

Check the selected cell constant or calibrate the measuring in-
strument with the measuring cell (see below).

3

Check the selected cell constant (see below) or calibrate the
measuring instrument with the measuring cell (see
section 4.5.5 on page 40).

4

Using

<

▲

> <

▼

>

, toggle between the measuring modes, con-

ductivity (

in

μ

S/cm

) or salinity (

SAL

).

«
...
34
35
36
37
38
...
»

Содержание Multi 197i

Страница 1: ...Multi 197i ba75339e04 07 2009 Operating manual RUN ENTER AUTO READ CAL STO M RCL ON OFF Multi 197i mg l O 7 1 7 6 92 C ARng TP REL1 Portable pH oxygen conductivity measuring instrument...

Страница 2: ...his operating manual and your instrument Also we cannot guarantee that there are absolutely no errors in this manual Therefore we are sure you will understand that we cannot ac cept any legal claims r...

Страница 3: ...0 4 3 4 pH calibration 21 4 4 Dissolved oxygen 27 4 4 1 General information 27 4 4 2 Measuring the D O concentration 29 4 4 3 Measuring the D O saturation 30 4 4 4 AutoRead AR Drift control and hold f...

Страница 4: ...ion 58 4 10 Reset 62 5 Maintenance cleaning disposal 65 5 1 Maintenance 65 5 2 Cleaning 65 5 3 Disposal 65 6 What to do if 67 6 1 pH system messages 67 6 2 Oxi system messages 69 6 3 Conductivity syst...

Страница 5: ...egree of operating comfort re liability and measuring certainty for all applications The proven MultiCal and OxiCal calibration procedures and the pro cedures to determine set up the cell constant sup...

Страница 6: ...8 8 8 8 8 88 1 C Time Year LoBat nLF Oxi Cal TEC ARng AR RCL Ident Tref25 Tref20 Auto Store REL2 TP No Day Month Baud REL1 Status display indicator Measured value Function and temperature display Sen...

Страница 7: ...ure or one pH electrode combination electrode or pH electrode reference electrode Please make sure that only one pH sensor is connected at the same time z One D O sensor z One conductivity measuring c...

Страница 8: ...me time Sensor Instrument Socket Posi tion pH depth armature 1 pH electrode or pH combination electrode 2 pH combination electrode with temperature sensor 2 and 4 Reference electrode 3 Temperature sen...

Страница 9: ...operating manual use the following safe ty instruction to indicate various types of danger Warning indicates instructions that must be followed precisely in order to avoid the possibility of slight in...

Страница 10: ...onment 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 instrume...

Страница 11: ...re chargeable battery or with the plug in power supply The plug in power supply supplies the measuring instrument with low voltage 12 V DC At the same time the rechargeable battery is charged Charging...

Страница 12: ...n 3 2 POWER SUPPLY z Set the date and time Setting the date and time 1 Connect the plug 1 to the socket 2 of the measuring instru ment 2 Connect the original WTW plug in power supply 3 to an easily ac...

Страница 13: ...et the current year with 9 Confirm with RUN ENTER The hours flash on the display 10 Set the current time with 11 Confirm with RUN ENTER The minutes flash on the display 12 Set the current time with 13...

Страница 14: ...on proper storage refer to the operating manual of the sensor Moistening the quiver insert Warning Do not store pH electrodes in the quiver for more than 10 hours To store them for a longer period of...

Страница 15: ...nt is made with the aid of a relay The active REL socket is shown on the display The measured variable on the display can be selected as follows using the M key Several measuring modes are available w...

Страница 16: ...nergy saving feature switches the measuring instrument off if no key has been pressed for an hour The energy saving feature is not active z if the power is supplied by the plug in power supply z if th...

Страница 17: ...rthed PC printer measurements cannot be per formed in earthed media as incorrect values would result The RS232 interface is not galvanically isolated 1 Connect the pH depth armature or the pH electrod...

Страница 18: ...hat you can either disconnect the 2nd sensor and use the manual temperature input or use an electrode with a temperature sensor If a temperature sensor is connected it is indicated on the display by T...

Страница 19: ...trode in the test sample 3 Press the keys repeatedly until pH appears on the status display The pH value appears on the display 4 When measuring without a connected temperature sensor Options z Determ...

Страница 20: ...hold function 3 Start AutoRead with RUN ENTER AR flashes until a stable measured value is reached This measured value is transmitted to the interface 4 If necessary start the next AutoRead measurement...

Страница 21: ...pending on the instrument setting see section 4 9 CONFIGURATION the instrument displays the relevant buffer nominal value or the current electrode voltage in mV The calibration can be terminated after...

Страница 22: ...e according to section 4 8 2 before calibrating After a valid calibration the record is printed Sample printout CALIBRATION PROTOCOL 02 03 02 14 19 Device No 12345678 Calibration pH Cal time 01 03 01...

Страница 23: ...e according to the electrode operating manual 30 30 62 61 or 56 50 E3 Perform error elimination ac cording to chapter 6 WHAT TO DO IF 30 or 30 62 or 50 1 Connect the pH electrode to the measuring inst...

Страница 24: ...nd 7 if you use a pH electrode with temperature sen sor or the temperature sensor of a conductivity measuring cell or a D O sensor Starting the calibration 1 Press the CAL key The Ct1 display and the...

Страница 25: ...8 Immerse the pH electrode into the second buffer solution 9 Press the RUN ENTER key The AR display indicator flashes The electrode voltage mV or the buffer nominal value ap pears on the display Examp...

Страница 26: ...Year Ident No Day Month Baud Sal cm 1 K RCL REL2 pH m cm S mg l 2 4 8 C TP REL1 AR Cal TEC Auto 1 O S LoBat nLF Lin Oxi Tref25 Tref20 8 Time Year Ident No Day Month Baud Sal cm 1 K RCL REL2 pH m cm S...

Страница 27: ...drift control for checking the stability of the measurement signal This ensures the reproducibility of the measur ing signal For details of how to switch the AutoRead function on off see page 31 Warn...

Страница 28: ...te Incorrect calibration of D O probes will result in incorrect measured values Calibrate at regular intervals Temperature sensor The D O sensor has an integrated temperature sensor that always measur...

Страница 29: ...s follows to switch on the salt content correction 1 Perform the preparatory activities according to section 4 4 1 2 Immerse the D O sensor in the test sample 3 Press the key repeatedly until the D O...

Страница 30: ...ies according to section 4 4 1 2 Immerse the D O sensor in the test sample 3 Press the key repeatedly until the D O saturation in appears on the display Sal S pH AR 1 LoBat nLF Lin Oxi Tref25 Tref20 C...

Страница 31: ...suring mode Reproducibility Response time D O concentra tion better than 0 05 mg l 10 seconds Oxygen saturation index better than 0 6 10 seconds 1 Call up the measuring mode with M and or 2 Activate t...

Страница 32: ...y indicator flashes The calibration process is fin ished when AR stops flashing Displaying the calibra tion data You can view the data of the last calibration on the display The pro ceeding is describ...

Страница 33: ...ote The sponge in the air calibration vessel must be moist not wet Ob serve the instructions in the OxiCal SL operating manual Display Relative slope S 0 8 1 25 S 0 7 0 8 S 0 6 0 7 E3 Perform error el...

Страница 34: ...shows the sensor evaluation see page 33 7 Switch to the measuring mode with M S AR Year Ident No Day Month Tref25 Tref20 LoBat Lin nLF mg l ARng Sal pH 1 TEC Auto Store 8 Time Baud Sal cm 1 K RCL REL2...

Страница 35: ...he salinity How to proceed is de scribed in section 4 5 3 MEASURING THE SALINITY on page 38 Entering the salt content Note How to switch on the salt content correction is described on page 29 1 Determ...

Страница 36: ...the measurement signal This ensures the reproducibility of the measur ing signal For details of how to switch the AutoRead function on off see page 39 Preparatory activities Perform the following prep...

Страница 37: ...play 2 Press the RUN ENTER repeatedly until the last calibrated cell constant is displayed e g 0 472 1 cm 3 To return to the measuring mode Press the M key when the correct cell constant is displayed...

Страница 38: ...The conductivity value appears on the dis play 1 Perform the preparatory activities according to section 4 5 1 page 36 2 Immerse the conductivity measuring cell in the test sample 3 Press the keys re...

Страница 39: ...essing RUN ENTER You can only change to another measuring mode after completion of AutoRead 1 Call up the measuring mode or SAL with M and or 2 Immerse the conductivity measuring cell in the test samp...

Страница 40: ...isplay indicator flashes The calibration process is finished when AR stops flashing Displaying the calibration data You can view the data of the last calibration on the display The pro ceeding is desc...

Страница 41: ...play or the fixed cell constant 0 475 1 cm without sensor symbol on the display In this case the measurement parameters are initialized See Reset on page 62 3 Immerse the conductivity measuring cell i...

Страница 42: ...WHAT TO DO IF 5 To return to the measuring mode Press the M key The de termined cell constant is taken over for the measurement TP ARng nLF C cm S Sal RCL S m mg l O Oxi Year Ident No Day Month Tref20...

Страница 43: ...red parameter Designation Default setting pH ORP Int 3 7 days Dissolved oxygen Int 4 14 days Conductivity Int 5 180 days 1 Switch off the measuring instrument 2 Press the M key and hold it down 3 Pres...

Страница 44: ...ber You can transmit measured values data records to the data storage in two ways z Save manually z Switch on AutoStore Int 1 see page 46 4 7 1 Saving manually You can transmit a measured value to the...

Страница 45: ...ument changes to the measuring mode No Time Cal d 1 I O AR cm 1 4 Tref25 TP ARng nLF C cm S Sal RCL S m mg l Oxi Year Day Month Tref20 LoBat Lin Sal TEC Auto Baud K REL2 pH mV 2 9 6 9 REL1 pH Store Id...

Страница 46: ...the required interval between the saving procedures with selection 5 s 10 s 30 s 1 min 5 min 10 min 15 min 30 min 60 min 4 Confirm with RUN ENTER The number of free memory locations appears on the dis...

Страница 47: ...toStore function is continued By this however temporal gaps in the re cording of the measured values will occur Switching off AutoStore Switch AutoStore off by z setting the save interval Int 1 to OFF...

Страница 48: ...rage location of the data record is displayed for approx 2 s then the respective temperature appears Display further data of the data record ID number date time storage location Press RUN ENTER Toggle...

Страница 49: ...required element ap pears on the display After approx 2 s the temperature of the displayed measured value appears 1 Press the RCL key repeatedly until Sto SEr appears on the display 2 Press the RUN EN...

Страница 50: ...1 No 4 09 03 02 17 46 7 11 mg l 17 8 C Tauto SAL 17 9 Ident 4 No 5 10 03 02 19 09 2 40 mS cm 25 3 C Tauto nLF Tref25 C 0 475 1 cm Ident 10 No 6 10 03 02 20 48 2 46 mS cm 25 6 C Tauto nLF Tref25 C 0 47...

Страница 51: ...mV 4 Press RUN ENTER to display the relative slope of the D O sensor pH TP Sal cm 1 K C Year Ident 1 S Store AR LoBat nLF Lin Oxi Tref25 Tref20 ARng 8 Time No Day Month Baud REL2 m cm S mg l Sal O pH...

Страница 52: ...In this case the measuring parameters are initialized see section 4 10 RESET 6 With M you can switch back to the last active measuring mode REL1 REL1 L C L C TP TP AR TEC Auto C pH C pH m cm S mg l mV...

Страница 53: ...ear Ident No Day Month Tref25 Tref20 LoBat Lin nLF Sal pH C TEC Auto Store Time Baud cm 1 K REL2 pH mV m cm S C S E R AL REL1 RCL CALIBRATION PROTOCOL 02 03 02 14 19 Device No 12345678 Calibration pH...

Страница 54: ...ing mode Proceed as follows to clear all data records Note The calibration data remain stored and can be called up 1 Switch off the measuring instrument 2 Press the STO key and hold it down 3 Press th...

Страница 55: ...ed intervals z With the Output data storage function page 48 calibration data or saved measured values are output on the interface 4 8 1 Data transmission interval Int 2 The interval for the data tran...

Страница 56: ...at the same time the data trans mission is performed according to the setting of the save interval Int 1 Set the save interval Int 1 to OFF to activate the Data transmission in terval Int 2 4 Confirm...

Страница 57: ...ld result Set up the following transmission data at the PC printer Socket assignment 4 8 3 Remote control The measuring instrument can be remotely controlled from a PC This requires the KOM pilot comm...

Страница 58: ...nt value in mbar no input possible Calibration intervals pH 1 7 999 dInt 3 O2 1 14 999 dInt 4 1 180 999 dInt 5 Date time Any 1 Switch off the measuring instrument 2 Press the M key and hold it down 3...

Страница 59: ...dent No Day Month Tref25 Tref20 LoBat Lin nLF Sal C Store Time Baud cm 1 K REL2 mV m cm S C I S P AL REL1 d RCL pH pH Cal TEC Auto 8 Confirm with RUN ENTER Int 3 and the measured variable pH appear on...

Страница 60: ...n t REL1 d I O Time Cal 13 Set the required interval in days d with 14 Confirm with RUN ENTER The reference temperature set for conductivity measurements appears on the display O AR cm 1 Tref25 TP AR...

Страница 61: ...he current year with 22 Confirm with RUN ENTER The hours flash on the display 23 Set the current time with 24 Confirm with RUN ENTER The minutes flash on the display 25 Set the current time with 26 Co...

Страница 62: ...ost when the measuring parameters are re set Recalibrate after performing a reset Configuration parameters The following configuration parameters InI are reset to the delivery status Measuring mode pH...

Страница 63: ...to reset the O2 measuring parameters 5 Using switch between no and YES YES Resetting the O2 measuring parameters no Retaining settings 6 Confirm with RUN ENTER The measuring instrument switches to th...

Страница 64: ...Time Cal I AR cm 1 TP ARng nLF C cm S Sal RCL S m mg l Oxi Year Ident No Tref20 LoBat Lin Sal TEC Auto Store Baud K REL2 pH mV n o i in REL1 O pH Day Month 0 9 Tref25 Time Cal I AR cm 1 TP ARng nLF C...

Страница 65: ...instrument is sent out in a protective transport packing We recommend Keep the packing material The original packing pro tects the measuring instrument from transport damages Rechargeable battery Remo...

Страница 66: ...tenance cleaning disposal Multi 197i 66 ba75339e04 07 2009 Measuring instrument Dispose of the measuring instrument without the rechargeable battery as electronic waste at an appropriate collection po...

Страница 67: ...e electrode Gel electrolyte dried out Replace electrode Cause Remedy Electrode Diaphragm contaminated Clean diaphragm Membrane contaminated Clean membrane Moisture in the plug Dry plug Electrolyte obs...

Страница 68: ...Membrane contaminated Clean membrane Test sample pH value not stable Measure with air excluded if necessary Temperature not stable Adjust temperature if necessary Electrode test sample Conductivity to...

Страница 69: ...ween gold and lead electrode Clean sensor and replace it if necessary Cause Remedy Invalid calibration Oxygen sensor Electrolyte solution depleted Regenerate sensor Membrane contaminated Clean membran...

Страница 70: ...function using the salinity equivalent Air bubbles bump 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...

Страница 71: ...Operating condition undefined or EMC load unallowed Processor reset Switch the instrument on while pressing the RCL key Cause Remedy Time out of the interface Check the instrument connected Cause Reme...

Страница 72: ...What to do if Multi 197i 72 ba75339e04 07 2009...

Страница 73: ...CE Ambient conditions Storage 25 C 65 C Operation 10 C 55 C Climatic class 2 Power supply Rechargeable battery Nickel metal hydride NiMH Operational life approx 600 hours with one charging Plug in pow...

Страница 74: ...e length Max 15m Guidelines and norms used EMC EC guideline 89 336 EEC EN 61326 1 1998 EN 61000 3 2 A14 2000 EN 61000 3 3 1995 FCC Class A Instrument safety E C guideline 73 23 EEC EN 61010 1 A2 1995...

Страница 75: ...uracies Variable Accuracy 1 Digit Concentration mg l 0 5 of measured value at ambient temperature of 5 C 30 C Saturation 0 5 of measured value when measuring in the range of 10 K around the calibratio...

Страница 76: ...the IOT table 0 1 T C 5 0 105 0 0 1 Accuracies Variable Accuracy 1 Digit S cm mS cm nonlinear compensa tion Accuracy Sample temperature 0 5 0 C 35 C according to EN 27 888 0 5 35 C 50 C extended nLF...

Страница 77: ...eviations explains the indicators and the abbreviations that appear on the display and in the manual Specialist terms The glossary briefly explains the meaning of the specialist terms How ever terms t...

Страница 78: ...pH mea surements Indicates the selection of the buffer data record for buffer solutions prepared according to DIN 19 266 Cm Display indicator during calibration for pH mea surements Indicates the sele...

Страница 79: ...rflow OxiCal Automatic calibration for D O measurements pH pH value S Slope internat k SAL Salinity SELV Safety Extra Low Voltage SLO Slope setting on calibration TC Temperature coefficient internat T...

Страница 80: ...ance to conduct an electric cur rent In water analysis the electrical conductivity is a dimension for the ionized substances in a solution D O partial pressure Pressure caused by the oxygen in a gas m...

Страница 81: ...t of the molality The practical pH value is the value of a pH measurement Potentiometry Name of a measuring technique The signal depending on the mea sured parameter of the electrode is the electrical...

Страница 82: ...lue is converted to a defined reference temperature For potentiometric measurements the slope value is adjusted to the tem perature of the test sample but the measured value is not converted Slope The...

Страница 83: ...Keys 6 M Mains operation 11 Measuring 36 conductivity 38 D O concentration 29 D O saturation 30 ORP voltage 20 pH value 19 Salinity 38 Measuring mode when switching on 16 Measuring ranges Conductivity...

Страница 84: ...Index Multi 197i 84 ba75339e04 07 2009 ues 55 Two point calibration 21 Two point calibration pH 21 25...

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