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wtw Oxi 197i, Operating Manual

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Oxi 197i

58

Abbreviations

AR

AutoRead (drift control)

ARng

Automatic range switching
Measuring instrument measures with highest reso-
lution

°C

Temperature unit, degrees Celsius

Cal

Calibration

E3

Error message 
see chapter 6 W

HAT

 

TO

 

DO

 

IF

... 

InI

Initialization
Resets individual basic functions to the status they 
had on delivery

LoBat

Battery almost empty (Low Battery)

OFL

Display range exceeded (Overflow)

OxiCal 

Automatic calibration for D. O. measurements

SAL

Salinity

SELV

Safety Extra Low Voltage

TP

Temperature measurement active (Temperature 
Probe)

Summary of Contents for Oxi 197i

Page 1: ...Oxi 197i ba75335e02 11 2004 Operating manual RUN ENTER AUTO READ CAL STO M RCL ON OFF Oxi 197i mg l O 7 1 7 6 92 C ARng TP REL1 Portable oxygen measuring instrument ...

Page 2: ...ating 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 resulting from the data figures or descriptions Copyright Weilheim 2004 WTW GmbH Reproduction in whole or even in part is prohibited without the ex press written permission of WTW GmbH Weilheim Printed in Germ...

Page 3: ... the measuring range AutoRange 18 4 2 5 AutoRead AR drift control and hold function 19 4 2 6 Sensor with stirrer StirrOx G 20 4 3 Calibration 21 4 3 1 Calibrating with the air calibration vessel 23 4 3 2 Calibrating via a comparison measurement 25 4 3 3 Entering the salt content salinity 27 4 4 Saving 28 4 4 1 Saving manually 28 4 4 2 Saving automatically 30 4 4 3 Outputting the data storage 32 4 ...

Page 4: ...List of contents Oxi 197i 4 5 2 Cleaning 47 5 3 Disposal 47 6 What to do if 49 7 Technical data 53 7 1 General data 53 7 2 Measuring ranges resolutions accuracies 55 8 Lists 57 ...

Page 5: ...ability and measuring certainty for all applications The proven OxiCal calibration procedure supports you in your work with the measuring instrument The special AutoRead function enables precise measurements 1 Keypad 2 Display 3 Integrated exchangeable sensor quiver 4 Socket field 5 Carrying and positioning handle RUN ENTER AUTO READ CAL STO M RCL ON OFF Oxi 197i mg l O 7 1 7 6 92 C ARng TP REL1 1...

Page 6: ...asheets You will find information on available literature in the WTW catalog or via the Internet 1 1 Display Sal pH mV m cm S cm 1 pH nLF TEC Tref25 Tref20 REL2 REL1 Lin K Sal mg l S O 8 8 8 8 8 88 1 C Time Year LoBat Oxi ARng AR RCL Ident Store TP No Day Month Baud Auto Cal Status display indicator Measured value Function and Temperature display Sensor symbol display ...

Page 7: ...ration Calibrate CAL Activate deactivate the AutoRead function AUTO READ Confirm entries start AutoRead output measured values RUN ENTER Select the measuring mode increase values scroll Select the measuring mode decrease values scroll Display transmit measured values RCL Save a measured value STO ON OFF M CAL AUTO READ RUN ENTER RCL RCL STO STO ...

Page 8: ...Only connect sensors to the measuring instrument that cannot return any voltages or currents that are not allowed SELV and current cir cuit with current limiting Nearly all sensors especially WTW sensors fulfill these conditions Sensor Instrument Socket Oxygen sensor 1 Integrated stirrer StirrOx G 2 Printer or PC serial interface RS232 3 Plug in power supply unit 4 Watertight valve for internal pr...

Page 9: ...f this operating manual use safety instructions such as the label shown below to indicate various hazards or dangers Warning indicates instructions that must be followed precisely in order to avoid the possibility of slight injuries or damage to the instrument or the envi ronment Further notes Note indicates notes that draw your attention to special features Note indicates cross references to othe...

Page 10: ...e 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 back into operation Safe operation If safe operation is no longer possible the instrument must be taken out of service and secured against inadvertent operation Safe operation is no longer possible if the m...

Page 11: ...ing instrument with low voltage 12 V DC At the same time the rechargeable battery is charged Note The automatic stirring function of the self stirring D O sensor StirrOx G can only be used when the plug in power supply is connect ed Charging time of the battery approx 16 hours The battery is charged even when the instrument is switched off The LoBat display indicator appears when the battery is ne...

Page 12: ...ER SUPPLY l 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 accessible mains socket 2 1 3 1 Press the M key and hold it down 2 Press the ON OFF key The display test appears briefly on the display 3 Press the RUN ENTER key repeatedly until the date flashes on the display ...

Page 13: ...rrent 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 Confirm with RUN ENTER The instrument switches to the measuring mode REL1 Tref25 5 t 2 Time Cal I O AR cm 1 TP ARng nLF C cm S Sal RCL S m mg l Oxi Year Ident No Tref20 LoBat Lin Sal pH TEC Auto Store Baud K ...

Page 14: ...onge rubber insert that can be moistened with deionized water Note For further details on proper storage refer to the operating manual of the sensor Moistening the quiver insert 1 Press the quiver out of the holder from the back side of the in strument and pull it out completely 2 Pull off the quiver tip and moisten the sponge rubber with deionized water ...

Page 15: ... the power is supplied by the plug in power supply l if the communication cable and a PC with a running communication program are connected l if the recorder cable is connected l if the printer cable is connected for external printers 1 Connect the D O sensor to the measuring instrument 2 Press the ON OFF key The display test appears briefly on the display The relative slope for the sensor type th...

Page 16: ...f how to switch the AutoRead function on off see page 19 Preparatory activities Perform the following preparatory activities when you want to measure Note Incorrect calibration of D O sensors will result in incorrect measured values Calibrate at regular intervals Note The measuring instrument automatically recognizes the type of the D O sensor CellOx 325 or DurOx 325 Temperature sensor The D O sen...

Page 17: ...rding to section 4 2 1 2 Immerse the D O sensor in the test sample 3 Press the M key repeatedly until the D O concentration in mg l appears on the display REL1 Sal S pH AR 1 LoBat nLF Lin Oxi Tref25 Tref20 Cal TEC Auto Store 8 Time Year Ident No Day Month Baud Sal cm 1 K RCL REL2 pH mV m cm S 7 1 7 6 92 C TP O ARng mg l 1 In the D O concentration measuring mode switch on the salt content correctio...

Page 18: ...re the instrument always measures in the measuring range with the highest possible resolution To switch the automatic measurement range selection on off see section 4 6 CONFIGURATION When the AutoRange function is switched on ARng appears on the display 1 Perform the preparatory activities according to section 4 2 1 2 Immerse the D O sensor in the test sample 3 Press the M key repeatedly until the...

Page 19: ...ellOx 325 l DurOx 325 Note The special features of the self stirring D O sensor StirrOx G can be found in section 4 2 6 on page 20 Measuring mode Reproducibility Response time D O concentra tion better than 0 05 mg l 10 seconds D O saturation index better than 0 6 10 seconds 1 Select the measuring mode with M 2 Activate the AutoRead function with AR The current mea sured value is frozen hold funct...

Page 20: ...witch on the stirrer and start an AutoRead measurement at the same time To do so proceed as follows 5 To terminate the AutoRead function Press the AR key 1 Select the measuring mode with M 2 Activate the AutoRead function with AR The current mea sured value is frozen hold function 3 Submerse the sensor in the test sample and press the stirrer button The stirrer is startet At the same time the Auto...

Page 21: ...al D air calibration vessel contained in the scope of delivery of the sensor l Calibration via a comparison measurement e g Winkler titration according to DIN EN 25813 or ISO 5813 At the same time the rel ative slope is adapted to the comparison measurement by a correc tion factor When to calibrate l After connecting another D O sensor l If the sensor symbol flashes i e after the calibration inter...

Page 22: ...nted Sample printout Sensor evaluation After the calibration the measuring instrument evaluates the current status of the sensor against the relative slope The evaluation appears on the display The relative slope has no effect on the measuring accu racy Low values indicate that the electrolyte will soon be depleted and the sensor will have to be regenerated CALIBRATION PROTOCOL 02 03 02 14 19 Devi...

Page 23: ...ess the CAL key repeatedly until O2 CAL appears 5 Press the RUN ENTER key AutoRead is active AR flashes 6 As soon as a stable value is achieved AR stops flashing Cal ibration is finished the sensor symbol indicates the relative slope determined and the sensor evaluation see page 22 REL1 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 ...

Page 24: ... you will find the measures to take for error elimination 7 Switch to the measuring mode with M REL1 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 pH mV m cm S 0 1 7 6 88 C TP O S AR Oxi Cal ...

Page 25: ...or from the calibrating solution 6 Perform a comparison measurement e g Winkler titration with the calibrating solution determine the nominal value Leave the measuring instrument switched on until the nominal value is determined 7 Set the displayed value on the measuring instrument to the nominal value with This changes the related correc tion factor of the relative slope REL1 S AR Year Ident No D...

Page 26: ...000 the display of the measured value units flashes 8 Switch to the measuring mode with M or RUN ENTER TP REL1 S Year Ident No Day Month Tref25 Tref20 LoBat Lin nLF Sal pH 1 TEC Auto Store Time Baud Sal cm 1 K RCL REL2 pH mV m cm S 4 0 0 7 45 C O 1 AR ARng Oxi Cal mg l ...

Page 27: ...ity correction Entering the salt content Note How to switch on the salt content correction is described on page 17 Parameter Value range Salinity 0 0 70 0 in steps of 0 1 1 Determining the salinity of the test sample any method 2 Press the CAL key repeatedly until Sal appears on the dis play 3 Enter the salt content with 4 Switch to the measuring mode with M REL1 TP Oxi Cal AR C S Year Ident No Da...

Page 28: ...n two ways l Save manually l Switch on AutoStore Int 1 4 4 1 Saving manually You can transmit a measured value to the data storage as follows 1 Press the STO key The current number location number No of the next free stor age location appears under the current measured value on the display 2 Confirm with RUN ENTER The display switches to entering the ID number RCL REL1 2 5 C TP Sal S pH AR 1 LoBat...

Page 29: ... to the measuring mode No RCL REL1 2 5 C TP Sal S pH AR 1 LoBat nLF Lin Oxi Tref25 Tref20 Cal TEC Auto 8 Time Year Day Month Baud Sal cm 1 K REL2 pH mV m cm S 8 2 37 O mg l ARng Store Ident Saving the current measured value The oldest measured value storage location 1 will be overwritten by this Press RUN ENTER Returning to the measuring mode without saving press any key Outputting the data storag...

Page 30: ...appears on the display 3 Set the required interval between the saving procedures with 4 Confirm with RUN ENTER The number of free memory locations appears on the display 5 As soon as all of the 500 storage locations are occupied AutoStore is terminated Int 1 OFF If there are not enough storage locations available for your measurements Output and backup the data storage see page 32 and clear the me...

Page 31: ...ing the save interval Int 1 to OFF or l switching the measuring instrument off and then on again 6 Confirm with RUN ENTER The prompt for the ID number appears on the display 7 Set the required ID number with 8 Confirm with RUN ENTER The instrument switches to the Oxi measuring mode and starts the measuring and saving process AutoStore flashes on the display REL1 9 49 E R F I pH No Time Cal O AR cm...

Page 32: ...n the display The storage location of the data record is displayed for approx 2 s then the respective temperature appears Display further elements of the data record ID number date time storage location Press RUN ENTER Advance one data record storage location Press Go back one data record storage location Press REL1 Store Auto Ident I pH No Time Cal O AR cm 1 Tref25 TP ARng nLF C cm S Sal S m mg l...

Page 33: ...e appears 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 ENTER key The complete storage content is transmitted to the interface during the data transmission the numbers of the currently transmitted storage locations run through After the data trans mission the measuring inst...

Page 34: ...8 C Tauto SAL 17 9 Ident 7 1 Press the RCL key repeatedly until CAL dISP appears on the display 2 Press the RUN ENTER key The relative slope appears on the display REL2 RCL REL1 Sal mg l ARng O TP Oxi Cal AR C S Year Ident No Day Month Tref25 Tref20 LoBat Lin nLF Sal pH C TEC Auto Store Time Baud cm 1 K pH mV m cm S C I S P AL d mV Oxi TEC Auto pH pH TP Sal cm 1 K C Year Ident 1 Store AR LoBat nLF...

Page 35: ...ing mode 1 Press the RCL key repeatedly until CAL SEr appears on the display 2 Press the RUN ENTER key The calibration protocol is transmitted to the interface After the data transmission the measuring instrument auto matically switches to the measuring mode REL2 TP AR K REL1 d Sal mg l ARng O Oxi Cal C S Year Ident No Day Month Tref25 Tref20 LoBat Lin nLF Sal pH C TEC Auto Store Time Baud cm 1 pH...

Page 36: ... 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 the ON OFF key The display test appears briefly on the display Subsequently Sto CLr appears 4 Confirm the clearing process with RUN ENTER Pressing any other key prevents the clearing the data records will remain stored REL1 RCL d Sa...

Page 37: ...der output page 39 measured values are out put as voltage values l With the KOM pilot communication kit accessory data can be transmitted bidirectionally page 40 Note If you connect a recorder analog output the output on the digital in terface is switched off 4 5 1 Data transmission interval Int 2 The interval for the data transmission Int 2 determines the chronolog ical interval between automatic...

Page 38: ...ss the RUN ENTER key and hold it down 2 Press the RCL key Int 2 appears on the display 3 Set the required interval between the saving procedures with 4 Confirm with RUN ENTER The measuring instrument automatically switches to the mea suring mode REL1 Store RCL d Sal mg l ARng O TP Oxi Cal AR C S Year Ident No Day Month Tref25 Tref20 LoBat Lin nLF Sal pH TEC Auto Time Baud cm 1 K REL2 pH mV m cm S ...

Page 39: ...ivated automatically in the cable by connecting 2 and 3 Signal range The signal range of the analog output depends on the measured vari able and the measuring range Concentration Saturation 1 free 2 Plug coding 3 Ground 4 Analog output 1 2 3 4 RS 232 REC internal resistance 5 Ohm Measuring range Voltage Resolution 0 19 99 mg l 0 1999 mV 0 01 mg l per 1 mV 0 90 0 mg l 0 900 mV 0 1 mg l per 1 mV Mea...

Page 40: ...a as incorrect values would result Set up the following transmission data at the PC printer Socket assignment 4 5 4 Remote control The measuring instrument can be remotely controlled from a PC This requires the KOM pilot communication kit It is available as an acces sory The instrument is then controlled via commands that simulate key strokes and request the current display contents Note A more de...

Page 41: ...ar no input possible Calibration interval Int 3 1 14 999 d AutoRange ARng On or off Date time Any 1 Switch off the measuring instrument 2 Press the M key and hold it down 3 Press the ON OFF key The display test appears briefly on the display The measuring instrument then switches automatically to the setting of the baud rate 4 Select the required baud rate with 5 Confirm with RUN ENTER On the disp...

Page 42: ...quired interval in days d with 8 Confirm with RUN ENTER ARng appears on the display AR cm 1 4 Tref25 TP ARng nLF C cm S Sal RCL S m mg l Oxi Year Ident No Day Month Tref20 LoBat Lin Sal pH TEC Auto Store Baud K REL2 pH mV 1 4 3 n t REL1 d I O Time Cal 9 Using switch between no and YES YES Switch on AutoRange no Switch off AutoRange 10 Confirm with RUN ENTER The date day flashes in the display I Ti...

Page 43: ...year with 16 Confirm with RUN ENTER The hours flash on the display 17 Set the current time with 18 Confirm with RUN ENTER The minutes flash on the display 19 Set the current time with 20 Confirm with RUN ENTER The measuring instrument automatically switches to the mea suring mode REL1 Tref25 5 t 2 Time Cal I O AR cm 1 TP ARng nLF C cm S Sal RCL S m mg l Oxi Year Ident No Tref20 LoBat Lin Sal pH TE...

Page 44: ...ets lost 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 D O concentration AutoRange automatic measure ment range selection On YES Relative slope 1 00 Correction factor of the relative slope 1 000 Salinity equivalent 0 0 Salinity correction Off Baud rate...

Page 45: ... rameters REL1 pH Day Month 0 9 Tref25 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 O 5 Using switch between no and YES YES Resetting the configuration parameters no Retaining settings 6 Confirm with RUN ENTER The measuring instrument automatically switches to the mea suring mode REL1 O pH Day Month 0 9 Tref...

Page 46: ...Operation Oxi 197i 46 ...

Page 47: ...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 Remove the rechargeable battery from the instrument and dispose of it at a suitable facility according to local legal requirements It is illegal to dispose of the rechargeable battery with household refuse Proceed as f...

Page 48: ...Maintenance cleaning disposal Oxi 197i 48 Measuring instrument Dispose of the measuring instrument without the rechargeable battery as electronic waste at an appropriate collection point ...

Page 49: ...FF keys at the same time and release them again The software version is displayed Cause Remedy Display range exceeded Oxygen sensor Not connected Connect the sensor Cable broken Replace sensor Depleted Replace sensor Short circuit between gold and lead electrode Clean sensor and replace it if necessary Cause Remedy Invalid calibration Oxygen sensor Electrolyte solution depleted Regenerate sensor M...

Page 50: ...le measured value Membrane contaminated Clean membrane Cause Remedy Insufficient flow Provide flow to the sensor Cause Remedy High amount of dissolved substances Correct solubility 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 Remedy Time out of ...

Page 51: ...ich software version is in the instrument Cause Remedy All memory locations are full Output data storage and clear data storage Cause Remedy E g a question by the WTW service department Simultaneously press the CAL and ON OFF keys and release them again The software version is displayed ...

Page 52: ...What to do if Oxi 197i 52 ...

Page 53: ... Rechargeable battery Nickel cadmium NiCad rechargeable battery Operational life approx 600 hours with one charging Plug in power supply unit charging device The following applies to all plug in power supplies Connection max Overvoltage category II Euro plug FRIWO FW1199 11 7864 Friwo Part No 1762613 Input 230 V 50 Hz 5 6 VA Output 12 V 130 mA 1 56 VA US plug FRIWO FW1199 11 7880 Friwo Part No 179...

Page 54: ...aud rate Can be set to 1200 2400 4800 9600 Baud Data bits 8 Stop bits 2 Parity None Handshake RTS CTS Xon Xoff Cable length Max 15m Variable Voltage Resolution Saturation Range 0 200 0 0 600 0 2 V 0 600 mV 0 1 1 Concentration mg l Range 0 20 00 mg l 0 100 0 mg l 0 2 V 0 1 V 0 01 mg l 0 1 mg l Accuracy 0 5 of display value 0 1 saturation or 0 5 of the display value 0 01 mg l Internal resistance 5 O...

Page 55: ...limatic class VDI VDE 3540 IP protection EN 60529 1991 Variable Measuring range Resolution Concentration mg l 0 19 99 0 19 9 0 90 0 0 90 0 01 0 1 0 1 1 Saturation 0 199 9 0 199 0 600 0 1 1 1 T C 0 50 0 0 1 Variable Accuracy 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 calibration temperat...

Page 56: ...Technical data Oxi 197i 56 ...

Page 57: ...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 that should already be familiar to the target group are not described here Index The index helps you to find the topics that you are looking for ...

Page 58: ...lsius Cal Calibration E3 Error message see chapter 6 WHAT TO DO IF InI Initialization Resets individual basic functions to the status they had on delivery LoBat Battery almost empty Low Battery OFL Display range exceeded Overflow OxiCal Automatic calibration for D O measurements SAL Salinity SELV Safety Extra Low Voltage TP Temperature measurement active Temperature Probe ...

Page 59: ...xture or liquid Measured parameter The measured parameter is the physical dimension determined by measuring e g pH conductivity or D O concentration Measured value The measured value is the special value of a measured parameter to be determined It is given as a combination of the numerical value and unit e g 3 m 0 5 s 5 2 A 373 15 K Measuring system The measuring system comprises all the devices u...

Page 60: ...ved in water Sample Designation of the sample ready to be measured Normally a test sample is made by processing the original sample The test sample and original sample are identical if the test sample was not processed Slope The slope of a linear calibration function Slope relative Designation used by WTW in the D O measuring technique It ex presses the relationship of the slope value to the value...

Page 61: ...s 49 I Initial commissioning 12 14 Initialization 44 Interval data transmission 37 save 30 K Keys 7 L LoBat 49 M Mains operation 11 Measuring range selection 18 Measuring the D O concen tration 17 Measuring the D O satura tion 18 O Operating safety 10 P Plug in power supply 11 Printing calibration protocol 22 R Remote control 40 Reset 44 RS232 interface 40 S Safety 9 safety precautions 9 Salt cont...

Page 62: ...Index Oxi 197i 62 ...

Page 63: ...Wissenschaftlich Technische Werkstätten GmbH Dr Karl Slevogt Straße 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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