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List of contents

88

4.8.4 Remote control  . . . . . . . . . . . . . . . . . . .136

4.9 Configuration  . . . . . . . . . . . . . . . . . . . . . . . . . .137

4.10 Reset  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

5

Maintenance, cleaning, disposal  . . . . . . . . .  143

5.1 Maintenance  . . . . . . . . . . . . . . . . . . . . . . . . . .143

5.1.1 Changing the batteries  . . . . . . . . . . . . .144
5.1.2 Replacing the roll of printer paper   . . . .145

5.2 Cleaning   . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146

5.3 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146

6

What to do if...  . . . . . . . . . . . . . . . . . . . . . . . .  147

6.1 pH system messages   . . . . . . . . . . . . . . . . . . .147

6.2 ISE system messages . . . . . . . . . . . . . . . . . . .149

6.3 General errors  . . . . . . . . . . . . . . . . . . . . . . . . .151

7

Technical Data  . . . . . . . . . . . . . . . . . . . . . . . .  153

7.1 General data  . . . . . . . . . . . . . . . . . . . . . . . . . .153

7.2 pH/Redox measurement  . . . . . . . . . . . . . . . . .156

7.3 ISE measurement  . . . . . . . . . . . . . . . . . . . . . .157

8

Lists   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  159

9

Appendix   . . . . . . . . . . . . . . . . . . . . . . . . . . . .  165

Summary of Contents for inoLab Oxi Level 2

Page 1: ...inoLab pH ION Level 2 ba12241e03 10 2002 85 Operating Manual pH ION meter with integrated printer ...

Page 2: ...purchase The instrument warranty extends to manufacturing faults that are determined within the period of warranty The warranty excludes components that are replaced during maintenance such as batteries etc The warranty 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 invalida...

Page 3: ...H value 101 4 2 2 Measuring the Redox voltage 102 4 3 Calibrating 103 4 3 1 Calibration interval Int 3 106 4 3 2 AutoCal TEC 107 4 3 3 AutoCal DIN 109 4 3 4 ConCal pH 111 4 4 Measuring the ISE concentration 114 4 5 ISE Calibration 117 4 6 Printing measured values 124 4 7 Storing 125 4 7 1 Manual storage 125 4 7 2 Switching on AutoStore Int 1 127 4 7 3 Outputting the data storage 129 4 7 4 Clearing...

Page 4: ...143 5 1 1 Changing the batteries 144 5 1 2 Replacing the roll of printer paper 145 5 2 Cleaning 146 5 3 Disposal 146 6 What to do if 147 6 1 pH system messages 147 6 2 ISE system messages 149 6 3 General errors 151 7 Technical Data 153 7 1 General data 153 7 2 pH Redox measurement 156 7 3 ISE measurement 157 8 Lists 159 9 Appendix 165 ...

Page 5: ...y and measuring safety for all applications The integrated printer enables the measurements to be documented in compliance with GLP The proven MultiCal calibration procedures and special AutoRead function support your work with the meter Note The measuring instrument can also be delivered as part of a set Information on this and other accessories is available in the WTW catalog LABORATORY AND FIEL...

Page 6: ...ration procedure 5 Select pH Redox measuring mode or ISE concentration 6 Display or transmit measured values 7 Measuring instrument ON OFF 8 Activate deactivate AutoRead function 9 Store measured value 10 Select pH measuring mode or Redox measuring mode increase values scroll 11 Confirm inputs start AutoRead 12 Select pH measuring mode or Redox measuring mode reduce values scroll 1 2 3 4 9 10 11 5...

Page 7: ...LV and circuit with current limiter Almost all commercial electrodes especially WTW electrodes meet these requirements Connectors 1 pH ion electrode 2 Temperature probe 3 Reference electrode 4 RS 232 interface analog output 5 Plug in power supply Status line Measured value display Function and temperature display Sensor symbol 1 2 3 4 5 ...

Page 8: ...verview diagram shows which keys you have to press to select between the different measuring modes Note For measuring the electrode suiting the selected measuring mode must be connected to the instrument ISE concentration mg l pH value Redox voltage mV ...

Page 9: ...for use in the laboratory Thus we assume that as a result of their professional training and experience the operators will know the necessary safety precautions to take when handling chemicals Symbols used Caution indicates instructions that have to be followed to prevent damage to your instrument Warning indicates instructions that have to be followed to protect yourself and the instrument from d...

Page 10: ...ecure technical condition Function and operational safety The smooth functioning and operational safety of the instrument can only be guaranteed if the generally applicable safety measures and the specific safety instructions in this operating manual are followed The smooth functioning and operational safety of the instrument can only be guaranteed under the climatic conditions specified in chapte...

Page 11: ...ngthy period of time l the instrument is visibly damaged l the instrument no longer operates as described in this manual If you are in doubt contact the supplier of the instrument Obligations of the operator The operator of this measuring instrument must ensure that the following laws and guidelines are observed when using dangerous substances l EEC directives for protective labor legislation l Na...

Page 12: ...Safety 96 ...

Page 13: ...isplay test appears briefly on the display The measuring instrument then switches automatically to the setting of the baud rate 3 Press the g key repeatedly until the date flashes on the display 4 Set today s date by pressing u d 5 Confirm with g The date month flashes on the display 6 Set the current month by pressing u d 7 Confirm with g The year appears on the display 8 Set the current year by ...

Page 14: ...l plug in power supplies only see chapter 7 TECHNICAL DATA Note You can also perform measurements without a plug in power supply However the functions of the integrated printer can only be used with connected plug in power supply 13 Confirm with g The measuring instrument then switches to the measuring mode 14 Switch off the instrument by pressing e 1 Insert the plug 1 into the socket 2 of the met...

Page 15: ...tive l if the power is supplied by the plug in power supply l if the AutoStore function is active l if the communication cable is connected l if the recorder cable is connected l if the printer cable is connected for external printers 1 Place the instrument on a flat surface and protect it against intense light and heat 2 Press the e key The display test appears briefly on the display The instrume...

Page 16: ...TC30 or Pt1000 The temperature measurement is absolutely essential for a reproducible pH measurement If the measurement is made without a temperature probe proceed as follows Note When calibrating without a temperature probe set up the current temperature of the respective buffer solution manually using u d while keeping the g key depressed 1 Connect the electrode to the instrument 2 Adjust the te...

Page 17: ...nto the test sample 3 Press the m key repeatedly until the pH Redox measurement appears on the display 4 Select the pH measuring mode by pressing u or d pH appears in the status line The pH value appears on the display 1 Activate the AutoRead function by pressing a The current measured value is frozen Hold function 2 Immerse the pH electrode into the test sample 3 Start the AutoRead function by pr...

Page 18: ...calibrated However you can check Redox electrodes using a test solution Reproducibility better than 0 01 Response time 30 seconds 1 Perform the preparatory activities according to section 4 2 2 Immerse the Redox electrode into the test sample 3 Press the m key repeatedly until the pH Redox measurement appears on the display 4 Select the Redox measuring mode by pressing u or d U appears in the stat...

Page 19: ...on procedures AutoCal TEC is specially adapted to the WTW technical buffer solutions as a fully automatic two point calibration The buffer solutions are automatically recognized by the instrument AutoCal DIN is specially adapted to permanently programmed buffer solutions according to DIN 19266 as a fully automatic two point calibration The buffer solutions are automatically recognized by the instr...

Page 20: ... calibration protocol after the calibration To do so switch on the printer before the calibration Print LED lights up green After a valid calibration the protocol is printed Sample printout CALIBRATION PROTOCOL 02 03 99 14 19 Device No 12345678 CALIBRATION pH Cal Time 01 03 99 15 20 Cal Interval 7d AutoCal DIN Tauto Buffer 1 1 679 Buffer 2 4 008 Buffer 3 6 865 Buffer 4 9 180 C1 174 1mV 25 0 C C2 1...

Page 21: ... 57 25 25 61 60 5 or 57 56 Clean the electrode according to the electrode operating manual 30 30 62 61 or 56 50 E3 Clear the fault according to chapter 6 WHAT TO DO IF 30 or 30 62 or 50 1 Switch on the instrument by pressing e 2 Connect the pH electrode to the instrument 3 Keep the buffer solutions ready 4 Adjust the temperature of the solutions and measure the current temperature if the measureme...

Page 22: ...ion interval expires Setting the calibration interval The calibration interval Int 3 is set to 7 days in the factory The interval can be changed 1 999 days 1 Switch off the instrument 2 Press m and hold down the key 3 Press the e key The display test appears briefly on the display The instrument then switches automatically to the configuration level 4 Press the g key until Int 3 appears on the dis...

Page 23: ...x measurement appears on the display pH or U appears in the status line 2 Press the c key repeatedly until the AutoCal TEC function display appears 3 If necessary set the temperature of the buffer solution using u d while keeping the g key depressed 4 Submerse the pH electrode in the first buffer solution 5 Press the g key AR flashes on the display The electrode voltage mV appears on the display A...

Page 24: ...nd buffer solution 9 Press the g key AR flashes on the display The electrode voltage mV appears on the display As soon as a stable value is recognized AR disappears The sensor symbol shows the electrode evaluation after the two point calibration The value of the slope mV pH appears on the display 10 Press the g key The value of the asymmetry mV appears on the display 11 To return to the measuring ...

Page 25: ...atedly until the pH Redox measurement appears on the display pH or U appears in the status line 2 Press the c key repeatedly until the AutoCal DIN function display appears 3 If necessary set the temperature of the buffer solution using u d while keeping the g key depressed 4 Submerse the pH electrode in the first buffer solution 5 Press the g key AR flashes on the display The electrode voltage mV ...

Page 26: ...buffer solution 9 Press the g key AR flashes on the display The electrode voltage mV appears on the display As soon as a stable value is recognized AR disappears The sensor symbol shows the electrode evaluation after the two point calibration The value of the slope mV pH appears on the display 10 Press the g key The value of the asymmetry mV appears on the display 11 To return to the measuring mod...

Page 27: ...e status line 2 Press the c key repeatedly until the ConCal function display appears 3 If necessary set the temperature of the buffer solution using u d while keeping the g key depressed 4 Submerse the pH electrode in the first buffer solution pH 7 0 0 5 5 Press the g key The measured pH value appears on the display 6 Set the nominal pH value of the buffer solution at the current temperature by pr...

Page 28: ...uffer solution 12 Press the g key The second measured pH value appears on the dis play 13 Set the nominal pH value of the second buffer solu tion at the current temperature 14 Press the g key The value of the slope mV pH appears on the dis play The sensor symbol shows the evaluation of the elec trode after the two point calibration 15 Press the g key The value of the asymmetry mV appears on the di...

Page 29: ...H or U appears in the status line 2 Press the c key repeatedly until the ConCal func tion display appears 3 Set the temperature of the buffer solution using u d while keeping the g key depressed 4 Submerse the pH electrode in the buffer solution 5 Press the g key The measured pH value appears on the display 6 Set the nominal pH value of the buffer solution at the current temperature by pressing th...

Page 30: ...he temper ature probe used As a result you can connect electrodes with the NTC30 or Pt1000 The temperature measurement is absolutely essential for a reproducible measurement If the measurement is made without a temperature probe proceed as follows Note It is not possible to enter temperature values manually for ISE measurements and calibration 1 Connect the electrode to the instrument 2 Adjust the...

Page 31: ...he m key repeatedly until ISE appears in the status line The concentration value appears on the display 1 Call up the ISE measuring mode by pressing m 2 Immerse the electrode into the test sample 3 Activate the AutoRead function by pressing a The current measured value is frozen Hold function 4 Start the AutoRead function by pressing g AR flashes on the display until a stable measured val ue is re...

Page 32: ...d measurement with acceptance of the current value can be terminated at any time by pressing g AutoRead criteria For identical measurement conditions the following criteria apply Reproducibility better than 0 05 mV Response time 30 seconds ...

Page 33: ...each ISE measurement if possible l After connecting another electrode l When the sensor symbol flashes after a voltage interrup tion e g battery change ConCal is the conventional two point calibration or three point cali bration with 2 or 3 freely selectable buffer solutions The concentration of the calibration standards depends on the concentration that is expected to be measured AutoRead In cali...

Page 34: ...LED lights up green After a valid calibration the protocol is printed Sample printout Electrode evaluation After the calibration the instrument evaluates the current status of the electrode i e the slope of the electrode mV The evaluation appears on the display CALIBRATION Protocol 02 03 99 16 20 Device No 1234 CALIBRATION ISE Cal Time 01 03 99 15 10 Std 1 10 01 mg l Std 2 20 00 mg l Std 3 50 00 m...

Page 35: ...r Note The measuring accuracy depends on the standard solutions selected and on the expected concentration of the ISE mea surement following 1 Switch on the instrument by pressing e 2 Connect the electrode to the instrument 3 Connect a temperature probe to the instrument in order to notice whether there are temperature diffe rences too high while calibrating 4 Keep the standard solutions ready 5 A...

Page 36: ... Enter the current concentration of the first standard solution using u d 4 Immerse the electrode into the first standard solution 5 Press the g key The electrode voltage appears on the display the AR display indicator flashes 6 As soon as a stable value is achieved AR stops flashing The previously set up concentration of the second standard solution appears on the display Two point calibra tion ...

Page 37: ...the second standard solu tion 10 Press the g key The electrode voltage appears on the display the AR display indicator flashes 11 The AR display indicator stops flashing as soon as a stable value is achieved The slope of the electrode mV appears on the display The sensor symbol shows the evaluation of the electrode for the measu ring range I after the two point calibration ...

Page 38: ...n of the third standard solution appears on the display 14 Enter the current concentration of the third standard solution using u d 15 Thoroughly rinse the electrode with distilled water 16 Immerse the electrode into the third standard solu tion 17 Press the g key The electrode voltage appears on the display the AR display indicator flashes Three point calibration ...

Page 39: ...on will then remain stored 18 The AR display indicator stops flashing as soon as a stable value is achieved The slope of the electrode mV for the measuring range II appears on the dis play The sensor symbol shows the evaluation of the electrode after the three point calibration 19 To return to the measuring mode press the m key ...

Page 40: ...ansmission Int 2 see page 132 After expiry of the selected interval the current data record is sent to the printer interface l Switch on AutoStore Int 1 see page 127 After expiry of the selected interval the current data record is sent to the printer interface and in addition is stored in the data store of the instrument AutoStore Int 1 covers the data transmission interval Int 2 l Press the g key...

Page 41: ...lue l Temperature l Temperature measurement procedure l I D number You can transmit measured values data records to the data storage in 2 ways l Manual storage l Switching on the AutoStore function Int 1 see page 127 4 7 1 Manual storage You can transmit a measured value to the data storage as follows 1 Press the s key The current number of the next free memory location appears on the display ...

Page 42: ...nges to the input of the I D number 3 Enter the required I D number 1 999 by pressing u d 4 Confirm with g The measured value is stored in the data storage The instrument changes to the measuring mode Store the current measured value The oldest measured value memory location 1 is overwritten by this Press g Return to the measuring mode without storing Press any key Output the data storage See sect...

Page 43: ...e AutoStore function is switched off To switch the function on set up a time interval 5 s 10 s 30 s 1 min 5 min 10 min 15 min 30 min 60 min Note If AutoStore is switched on the setting of the data transmis sion interval Int 2 is ineffective see see page 132 1 Press and hold down the g key 2 Press the s key Int 1 appears on the display 3 Press the u d keys to set up the required time in terval betw...

Page 44: ...our measurements backup the data storage see see page 129 and clear the data storage see see page 131 6 Confirm with g The prompt for the I D number appears on the dis play 7 Press u d to set the required I D number 8 Confirm with g The instrument changes to the measuring mode and starts the measuring and storage procedure AutoStore flashes on the display ...

Page 45: ... off the AutoStore function by l Setting the storage interval Int 1 to OFF or l Switch the meter off and on again 4 7 3 Outputting the data storage The contents of the data storage can be output to the l display l printer interface 1 Press the r key repeatedly until Sto disp appears on the display 2 Press the g key A measured value appears on the display The memory location of the data store appea...

Page 46: ...rd memory location Press d 1 Select the parameter e g date by pressing g 2 Press u or d repeatedly until the required date ap pears on the display After approx 2 s the tempera ture of the displayed measured value appears 1 Press the r key repeatedly until Sto SEr appears on the display 2 Press the g key Sto CAL appears on the display The calibration pro tocol is transmitted to the printer interfac...

Page 47: ...au tomatically changes to the measuring mode In order to delete all the data records proceed as follows Note The calibration data remain in the storage and can be called up via the calibration protocol 1 Switch off the instrument 2 Press and hold down the s key 3 Press the e key The display test appears briefly on the display 4 Confirm the clearing process by pressing g Pressing any other key stop...

Page 48: ... is used to out put measured values as voltages l Data can be transmitted bidirectionally see page 136 using the KOM pilot communication package accessory 4 8 1 Data transmission interval Int 2 The interval for the data transmission Int 2 determines the time interval between automatic data transmissions After the time interval expires the current data record is transmit ted to the interface Note T...

Page 49: ...erval Int 1 to OFF to activate the data transmission interval Int 2 Note You can also set the data transmission interval Int 2 in the Configuration menu see page 137 2 Press the a key Int 2 appears on the display 3 Press u d to set up the required time interval be tween storage processes 4 Confirm with g The instrument changes automatically to the measur ing mode ...

Page 50: ...corder via the AK323 interface cable The data output switches automatically to recorder output Note Activate the analog output by connecting 2 and 3 Socket assignment 1 Free 2 Plug coding 3 Ground 4 Analog output 1 2 3 4 RS 232 REC Output Low impedance electrode signal corresponds to 50 62 mV pH on the pH electrode internal resistance 5 Ohm ...

Page 51: ...witches automatically to RS232 Note The RS232 interface is not galvanically isolated If it is connected to an earthed PC printer measurements cannot be made in earthed media as this would give incor rect results Set up the following transmission data on the PC printer Baud rate Selectable between 1200 2400 4800 9600 Handshake RTS CTS Xon Xoff PC only Parity None Data bits 8 Stop bits 1 Socket assi...

Page 52: ...uires the KOM pilot communication package that is avail able as an accessory The instrument is then controlled via commands that simulate keystrokes and request the current display con tents Note A more detailed description is provided within the scope of delivery of the communication package ...

Page 53: ...tored To do this press the m key Baud rate 1200 2400 4800 9600 Data transmission inter val Int 2 OFF 5 s 10 s 30 s 1 min 5 min 10 min 15 min 30 min 60 min Calibration interval Int 3 only for pH 1 7 999 d Temperature unit C F Date time As required Resolution of pH display 0 01 0 001 1 Switch off the instrument 2 Press and hold down the m key 3 Press the e key The display test appears briefly on the...

Page 54: ...ng u d 5 Confirm with g Int 2 data transmission interval appears on the dis play 6 Set up the required time interval by pressing u d 7 Confirm with g Int 3 calibration interval appears on the display Baud rate Data transmission interval Calibration interval ...

Page 55: ...n C and F by pressing u d 11 Confirm with g The date flashes on the display Temperature unit 12 Set today s date by pressing u d 13 Confirm with g The date month flashes on the display 14 Set the current month by pressing u d 15 Confirm with g The year appears on the display 16 Set the current year by pressing u d Date and time ...

Page 56: ...ing u d 21 Confirm with g The instrument changes automatically to the measur ing mode 1 Press and hold down the g key 2 Press the m key The measured values appear with the higher resolution on the display e g pH 4 012 3 Press the g key and m key again The measured values with the lower resolution appear on the display e g pH 4 01 Adjusting the reso lution for the pH Redox measurement ...

Page 57: ...e reset the calibration data are lost After the parameters have been reset cali brate Configuration parameters The following configuration parameters InI are reset to the values they had on delivery Measuring mode pH Asymmetry of the pH electrode 0 mV Slope of the pH electrode 59 16 mV pH pH calibration procedure AutoCal TEC Temperature manual 25 C Resolution of pH display 0 001 Baud rate 4800 Int...

Page 58: ... no retain settings 4 Confirm with g The instrument changes to the configuration param eters 5 Toggle between no and YES by pressing u d YES reset configuration parameters no retain settings 6 Confirm with g The instrument changes automatically to the measur ing mode Resetting measur ing parameters Resetting configura tion parameters ...

Page 59: ...disposal 5 1 Maintenance The maintenance tasks are restricted to the following activi ties l replacing the batteries and l replacing the roll of printer paper Note See the relevant operating manual of the electrodes for in structions on electrode maintenance ...

Page 60: ...he signs on the batteries Only use leakproof alkaline manganese batteries 1 Open the battery compartment 1 on the underside of the instrument 2 Remove the four batteries from the battery compart ment 3 Insert four new batteries Type Mignon AA into the battery compartment 4 Close the battery compartment 1 The date day flashes on the display 5 Set up the date and time according to section 3 2 1 ...

Page 61: ...ON or via the Internet You can also use HQ thermal paper that remains legible for at least 10 years 1 Switch off the printer Print LED lights up red 2 Open the lid of the printer 1 3 Remove the empty roll of paper 2 4 Insert the new roll of paper Fold the leading edge of the paper inwards and thread it into the printer 3 from underneath Press the f Print key paper feed 5 Close the lid of the print...

Page 62: ...rument against damage during transport Batteries This note refers to the battery regulation that applies in the Federal Republic of Germany We would ask end consum ers in other countries to follow their local statutory provi sions Note In compliance with 14 of the BATTERY REGULATION we would like to point out that this instrument contains batteries Batteries that have been removed must only be dis...

Page 63: ...Cause Remedy pH electrode Diaphragm contaminated Clean diaphragm Membrane contaminated Clean membrane Moisture in the plug Dry plug Electrolyte obsolete Replenish electrolyte or replace electrode Electrode obsolete Replace electrode Electrode broken Replace electrode Measuring instrument Incorrect calibration procedure Select correct procedure Incorrect solution tempera ture without temp probe Set...

Page 64: ...d Clean diaphragm Membrane contaminated Clean membrane Sample pH value not stable Measure with air excluded if necessary Temperature not stable Adjust temperature if necessary Electrode sample Conductivity too low Use suitable electrode Temperature too high Use suitable electrode Organic liquids Use suitable electrode Cause Remedy Calibrating interval expired Newly calibrate measuring system No st...

Page 65: ... connected Connect electrode Cable broken Replace electrode Cause Remedy Ion sensitive electrode Slope not in the range 50 70 mV or 23 35 mV Replace electrode Recalibrate Moisture in the plug Dry plug Electrode obsolete Replace electrode Electrode broken Replace electrode Measuring instrument Calibration procedure order of the standards wrong in three point calibration Select correct order Socket ...

Page 66: ...ibration standards Cause Remedy During calibration Calibration standards have the wrong temperature maximum temperature difference 2 C Temper the calibration standards During measurement Test sample has the wrong temperature maximum temperature difference 2 C Temper the test sample Cause Remedy Standard 2 Standard 1 Use different calibration standards Concentration dis play flashes U2 U1 5mV U3 U2...

Page 67: ...t depleted Replace batteries see section 5 1 1 CHANGING THE BATTERIES Cause Remedy Timeout of the interface Checkout connected instrument Cause Remedy Operating state undefined or EMC electric stress unallowed Processor reset Press the a key and switch on instrument Calibration Std 3 flashes LoBat display to to to to display Instrument does not react to keystroke Cause Remedy e g question of the W...

Page 68: ... or Data transmission Int 2 is switched on Switch off functions Cause Remedy Printer is switched on Switch off printer Interface cable connected Unplug cable Cause Remedy Paper inserted with wrong side upwards Turn the roll of paper around and insert it with the other side upwards Cause Remedy All 800 memory locations are full Output data store and clear data store Integrated printer does not prin...

Page 69: ... explains abbreviations that appear on the display or when dealing with the instrument Specialist terms The glossary briefly explains the meaning of the specialist terms However terms that should already be familiar to the target group are not described here Index The index helps you find the topics that you are looking for ...

Page 70: ...n with DIN buffer solutions acc to DIN 19 266 ConCal Conventional one two point calibration in the ISE measuring mode also three point calibration Ct Calibration with WTW technical buffer solutions disp Display Displays the data storage on the screen E3 Error message see WHAT TO DO IF InI Initialization Resets individual basic functions to the status they had on delivery ISE Ion sensitive electrod...

Page 71: ...interface Output of the data storage on the RS 232 or on the internal printer SLO Slope Slope setting on calibration Sto Store Memory Temp error Temperature measurement error TP Temperature probe Temperature measurement active UASY Asymmetry potential C Temperature unit Celsius F Temperature unit Fahrenheit ...

Page 72: ...the measuring instrument to a probe Diaphragm Contact point between the reference electrolytic solution and the sample Drift control See AUTOREAD MultiCal Group term for the various WTW calibration procedures used for automatic calibration in buffer solutions Test sample Sample to be measured can be liquid or solid Test solution Stable solution with a precisely known Redox voltage Redox voltage Po...

Page 73: ...e 0 C 55 C Allowable relative hu midity Annual mean 75 30 days year 95 Other days 85 Ambient temperature Output signal corresponds to electrode voltage i e 50 62 mV pH unit Accuracy 0 5 of measured value 4mV Internal resistanace 5 Ohm current limitation to max 0 2 mA output current Type RS 232 data output Baud rate can be set to 1200 2400 4800 9600 Baud Data bits 8 Stop bit 1 Parity none Handshake...

Page 74: ... pow er supply EMC E C guideline 89 336 EEC EN 61326 1 1997 EN 61000 3 2 A14 2000 EN 61000 3 3 1995 FCC Class A Instrument safety E C guideline 73 23 EEC Protective class 3 EN 61010 1 A2 1995 Climatic class 2 VDI VDE 3540 TÜV GS UL CUL CE Dimensions and weight Guidelines and norms used Test marks ...

Page 75: ...cate gory II Plug in power supply Euro plug FRIWO FW3288 11 8134 Friwo Part No 1816492 Input 230V 50 Hz 23 VA Output 6 V 1 8 A 10 8 VA Plug in power supply US plug FRIWO FW3288 11 8451 Friwo Part No 1816493 Input 120V 60 Hz 21 5 VA Output 6 V 1 8 A Plug in power supply UK plug FRIWO FW3288 11 8453 Friwo Part No 1770896 Input 230V 50 Hz 23 VA Output 6 V 1 8 A Energy supply ...

Page 76: ...5 0 T F 23 0 221 0 pH 2 pH units around the calibration point 0 005 at 15 C to 35 C 0 01 U mV 0 3 at 15 C 35 C 1 T C NTC 30 0 1 PT 1000 0 5 at 0 C 15 C 0 1 at 15 C 35 C 1 at 35 C 55 C T F NTC 30 0 2 PT 1000 0 9 at 32 F 59 F 0 2 at 59 F 95 F 1 8 at 95 F 131 F Measuring rang es and resolution Accuracy 1 digit ...

Page 77: ...int or three point calibration with standards suiting the sample Slope ranges 25 to 35 mV and 50 to 70 mV Measuring range 1 Resolution 0 000 9 999 mg l 0 001 mg l Measuring range 2 Resolution 0 00 99 9 mg l 0 01 mg l Measuring range 3 Resolution 0 0 999 9 mg l 0 1 mg l Measuring range 4 Resolution 0 1999 mg l 1 mg l Measuring ranges and resolution ...

Page 78: ...Technical Data 158 ...

Page 79: ...1 D data record 125 data transmission interval 132 date setting 97 139 display 91 drift control 101 115 E electrode evaluation 118 energy saving feature 99 error messages 147 149 I initial commissioning 97 initialize 141 interval data transmission 132 pH calibration 106 storing 127 K keys 90 L LoBat 151 M measuring precision 106 O operating structure 92 operational safety 94 P paper roll replacing...

Page 80: ...bration ConCal 113 single point calibration pH 103 slope 103 117 sockets 91 T temperature probe 100 114 three point calibration ConCal ISE 122 time setting 97 139 two point calibration ConCal ISE 120 two point calibration 103 117 AutoCal DIN 110 AutoCal TEC 108 ConCal 111 ...

Page 81: ...Appendix 165 9 Appendix ...

Page 82: ...rther informationen or application notes you can ask for l Application reports l Primers l Safety data sheets You can find information on available literature in the WTW catalog LABORATORY AND FIELD INSTRUMENTATION or via the Internet ...

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