Operating manual Oxi 1970i ON / O M CAL AUTO RUN / OFF READ ENTE 792 mg/ l 176° C R ARng RCL TP REL1 STO Oxi 1 970i Portable oxygen measuring instrument ba75691e01 01/2007
Oxi 1970i Accuracy when going to press Copyright 2 The use of advanced technology and the high quality standard of our instruments are the result of a continuous development. This may result in differences between this 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 accept any legal claims resulting from the data, figures or descriptions.
Oxi 1970i Contents Oxi 1970i - Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 1.2 1.3 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 2.2 3 4.3 4.4 4.5 01/2007 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Initial commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Oxi 1970i 4.6 4.7 5 Maintenance, cleaning, disposal . . . . . . . . . . . . . . . . . 47 5.1 5.2 5.3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 6 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 7 Technical data . . . . . . . . . . . . . . . . . .
Oxi 1970i Overview 1 Overview The portable Oxi 1970i measuring instrument enables you to carry out oxygen measurements rapidly and reliably. The Oxi 1970i provides the maximum degree of operating comfort, reliability 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.
Overview Oxi 1970i Note If you need further information or application notes, you can obtain the following material from WTW: z Application reports z Primers z Safety datasheets. You will find information on available literature in the WTW catalog or via the Internet. 1.1 Display Status display indicator pH S O Sal Time 1888 Baud Day.Month Year No.
Oxi 1970i Overview 1.2 Key functions Keypad ON / OFF M Switch measuring instrument on/off Select the measuring mode : – D. O.
Overview Oxi 1970i 1.3 Sensors Socket field You can use the following sensors with the Oxi 1970i: z Oxygen depth armature z D. O. sensor CellOx 325, or z D. O. sensor DurOx 325, or z Self-stirring D. O.
Oxi 1970i Safety 2 Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the measuring instrument . Consequently, all responsible personnel must read this operating manual before working with the measuring system. The operating manual must always be available within the vicinity of the measuring system. Target group The measuring instrument was developed for work in the field and in the laboratory.
Safety Oxi 1970i 2.2 General safety instructions This instrument is built and inspected according to the relevant guidelines and norms for electronic measuring instruments (see chapter 7 TECHNICAL DATA). It left the factory in a safe and secure technical condition.
Oxi 1970i Commissioning 3 Commissioning 3.1 Scope of delivery z Portable measuring instrument, Oxi 1970i with integrated rechargeable battery z Carrying and positioning handle z Carrying strap z Sensor quiver z Plug-in power supply unit z Operating manual 3.2 Mains operation and charging the battery Power supply You can either operate the measuring instrument with the integrated rechargeable battery or with the plug-in power supply.
Commissioning Oxi 1970i Connecting the plug-in power supply unit 2 1 3 1 Connect the plug (1) to the socket (2) of the measuring instrument. 2 Connect the original WTW plug-in power supply (3) to an easily accessible mains socket. 3.3 Initial commissioning Perform the following activities: z For mains operation and charging the battery: Connect the plug-in power supply (see section 3.2 POWER SUPPLY). z Set the date and time. Setting the date and time 12 1 Press the key and hold it down.
Oxi 1970i Commissioning pH S O Sal Time It 25 Baud Day.Month Year No. Ident Tref25 LoBat ba75691e01 01/2007 nLF 090 Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 4 °C% / K ARng TP REL1 REL2 AR RCL 4 Set the date of the current day with <▲> <▼>. 5 Confirm with . The date (month) flashes in the display. 6 Set the current month with <▲> <▼>. 7 Confirm with . The year appears on the display. 8 Set the current year with <▲> <▼>.
Commissioning Oxi 1970i 3.4 Sensor quiver To store the sensors during field operation and to keep the sensor element moist, the quiver tip contains a sponge 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 14 1 Press the quiver out of the holder from the back side of the instrument and pull it out completely.
Oxi 1970i Operation 4 Operation 4.1 Switching on the measuring instrument 1 Connect the D. O. sensor to the measuring instrument. 2 Press the key. The display test appears briefly on the display. The relative slope for the sensor type that was just connected subsequently appears for approx. one second. The measuring instrument then automatically switches to the measuring mode that was last selected. The display shows the relevant measured value.
Operation Oxi 1970i 4.2 Measuring 4.2.1 General information You can measure the following variables: z D. O. concentration z D. O. saturation 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 instrument to change automatically to the next higher measuring range and back again.
Oxi 1970i Operation 4.2.2 Measuring the D. O. concentration Note When measuring the concentration of test samples with a salt content of more than 1 g/l, a salinity correction is required. For this, you have to measure and input the salinity of the measured medium first. This is described in section 4.3.3 on page 27. Switching the salt content correction on or off, see below. To measure the D. O.
Operation Oxi 1970i 4.2.3 Measuring the D. O. saturation You can measure the D. O. saturation as follows: 1 Perform the preparatory activities according to section 4.2.1 2 Immerse the D. O. sensor in the test sample. 3 Press the key repeatedly until the saturation in % appears on the display. pH S O Sal Time 1892 Baud Day.Month Year No. Ident Tref25 LoBat nLF 4.2.
Oxi 1970i Operation 4.2.5 AutoRead AR (drift control) and hold function The AutoRead function (drift control) checks the stability of the measurement signal. The stability has a considerable impact on the reproducibility of the measured values. With the aid of the hold function the measured value display is frozen. Criteria With identical measurement conditions, the following criteria are valid for the AutoRead function: Measuring mode Reproducibility Response time D. O.
Operation Oxi 1970i 5 To terminate the AutoRead function: Press the key. 4.2.6 Connection Sensor with stirrer (StirrOx G) Connect the 2-pole stirrer plug to the stirrer output of the measuring instrument (designation REL1). 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 connected. Stirrer function The D. O. sensor, StirrOx G, has a temperature sensor and stirrer integrated.
Oxi 1970i Operation 4.3 Why calibrate? Calibration data records Calibration D. O. sensors age. This changes the slope of the D. O. sensor. Calibration determines the current slope of the sensor and stores this value in the instrument. Thus, you should calibrate at regular intervals.
Operation Printing the calibration record Oxi 1970i The calibration protocol contains the calibration data of the current calibration. You can transmit the calibration protocol to a printer via the serial interface (see page 35). Note You can automatically print a calibration record after the calibration. To do so, connect a printer to the interface according to section 4.5.3 before calibrating. After a valid calibration, the record is printed. Sample printout: CALIBRATION PROTOCOL 02.03.
Oxi 1970i Operation 4.3.1 Calibrating with the air calibration vessel Proceed as follows to calibrate the instrument: 1 Connect the D. O. sensor to the measuring instrument. 2 Keep an air calibration vessel ready for use. Note The sponge in the air calibration vessel must be moist (not wet). Follow the instructions in the OxiCal®-SL or DurOx 325 operating manual. 3 Put the D. O. sensor into the air calibration vessel. 4 Press the key repeatedly until O2 CAL appears.
Operation Oxi 1970i pH S O Sal Time 1088 Baud Day.Month Year No. Ident Tref25 LoBat 7 nLF 817 Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 6 °C% / K ARng TP REL1 REL2 AR RCL Switch to the measuring mode with . Note In chapter 6 WHAT TO DO IF... page 49, you will find the measures to take for error elimination.
Oxi 1970i Operation 4.3.2 Calibrating via a comparison measurement Proceed as follows to calibrate the instrument: 1 Connect the D. O. sensor to the measuring instrument. 2 Press the key repeatedly until O2 FAC appears. pH S O Sal Time 1F AC Baud Day.Month Year No. Ident Tref25 LoBat nLF Tref20 Lin Oxi Auto Store Cal TEC ARng TP REL1 REL2 AR RCL 3 Immerse the D. O. sensor in the calibrating solution. 4 Press the key. The AutoRead measurement begins.
Operation Oxi 1970i pH S O Sal Time 1445 Baud Day.Month Year No. Ident Tref25 LoBat 8 nLF 100 Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 7 °C% / K ARng TP REL1 REL2 AR RCL Switch to the measuring mode with or . Note If the correction factor deviates from 1.000, the display of the measured value units flashes.
Oxi 1970i Operation 4.3.3 Entering the salt content (salinity) A salt content correction is required in the oxygen concentration measurement of samples with a salt content of more than 1 g/l. To do this, you have to enter the salinity equivalent (the measured salinity) of the test sample (range 0.0 - 70.0) and to switch on the salinity correction. Entering the salt content Parameter Value range Salinity 0.0 ... 70.0 in steps of 0.1 1 Determining the salinity of the test sample (any method).
Operation Oxi 1970i 4.4 Saving The measuring instrument has an internal data memory. It can store up to 500 datasets. A complete data record consists of: z Storage location z Date/time z Measured value z Temperature z Temperature measuring procedure z ID number You can transmit measured values (data records) to the data storage in two ways: z Save manually z 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 key.
Oxi 1970i Operation pH S O Sal Time 1837 Baud Day.Month Year No. Ident Tref25 LoBat Message StoFull nLF 825 Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 2 °C% / K TP REL1 REL2 AR RCL ARng 3 Using <▲> <▼>, enter the required ID number (1 ... 999). 4 Confirm with . The instrument changes to the measuring mode. This message appears when all of the 500 storage locations are occupied.
Operation Oxi 1970i 4.4.2 Saving automatically The save interval (Int 1) determines the chronological interval between automatic save processes. After the fixed interval has expired, the current data record is transmitted to the storage and to the interface. Setting the save interval: The default setting for the save interval (Int 1) is OFF. By this, the AutoStore function is switched off.
Oxi 1970i Operation 6 Confirm with . The prompt for the ID number appears on the display. pH S O Sal Time I499 Baud Day.Month Year No. Ident Tref25 LoBat nLF FRE Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 1 °C% / K ARng TP REL1 REL2 AR RCL 7 Set the required ID number with <▲> <▼>. 8 Confirm with . The instrument switches to the Oxi measuring mode and starts the measuring and saving process. AutoStore flashes on the display.
Operation Oxi 1970i 4.4.3 Outputting the data storage You can output the contents of the data storage: z Stored data on the display z Calibration data on the display z Stored data on the serial interface z Calibration protocol on the interface Outputting stored data on the display 1 Press the key repeatedly until StO dISP appears on the display. pH S O Sal Time IST o Baud Day.Month Year No. Ident Tref25 LoBat nLF 2 DIS Tref20 Lin Oxi Auto Store Cal TEC Baud No.
Oxi 1970i Operation Note If you want to search for a certain element (e.g. date), proceed as follows: Outputting stored data to the interface 1 Using , select the element (e.g. date). 2 Press <▲> or <▼> repeatedly until the required date appears on the display. After approx. 2 s the temperature of the displayed measured value appears. 1 Press the key repeatedly until Sto SEr appears on the display. pH S O Sal Time IST o Baud Day.Month Year No.
Operation Oxi 1970i Sample printout: Device No.: 99990000 No. 1: 09.03.02 101.7 % Tauto Ident : 10 No. 2: 09.03.02 7.11 mbar Tauto Ident : 10 17:10 17.6° 17:11 17.6° No. 4: 09.03.02 7.11 mg/l Tauto SAL = 17.9 Ident : 7 ... 1 17:12 17.6° C 17:15 17.8° C Press the key repeatedly until CAL dISP appears on the display. pH S O Sal Time C C AL Baud Day.Month Year No. Ident Tref25 LoBat nLF 2 Tref20 Lin Oxi Auto Store Cal TEC 34 ARng 1088 Baud No.
Oxi 1970i Operation Outputting the calibration protocol on the interface 3 Using or , you can switch back to the measuring mode. 1 Press the key repeatedly until CAL SEr appears on the display. pH S O Sal Time C C AL Baud Day.Month Year No. Ident Tref25 LoBat 2 nLF dSER Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal % /K °C ARng TP REL1 REL2 AR RCL Press the key. The calibration protocol is transmitted to the interface.
Operation Oxi 1970i 4.4.4 Clearing the memory With this function, you can delete the stored data records. 500 storage locations will then be available again. Note The Clear memory function only appears when there are data records stored in the memory. Otherwise, the measuring instrument automatically switches to the measuring mode. Proceed as follows to clear all data records: 1 Switch off the measuring instrument. 2 Press the key and hold it down. 3 Press the key.
Oxi 1970i Operation 4.5 Transmitting data You have the following possibilities of transmitting data: z One of the following options: – With the AutoStore function (page 30), measured values are periodically saved internally (save interval Int 1) and output on the interface. – With the Data transmission interval function (Int 2), measured values are periodically output on the interface (see below).
Operation Setting the Data transmission interval Oxi 1970i The default setting for the interval is OFF. To start the data transmission, set an interval (5 s, 10 s, 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min): 1 Press the key and hold it down. 2 Press the key. Int 2 appears on the display. pH S O Sal Time InT 2 Baud Day.Month Year No.
Oxi 1970i Operation 4.5.2 Recorder (analog output) You can transmit data to a recorder via the analog output. Connect the analog output to the recorder via the AK323 interface cable. The data output automatically switches to Recorder output. Socket assignment 1 4 2 3 RS 232 REC 1 free 2 Plug coding 3 Ground 4 Analog output (internal resistance < 5 Ohm) Note The analog output is activated automatically in the cable by connecting 2 and 3.
Operation Oxi 1970i 4.5.3 PC/external printer (RS232 interface) Via the RS 232 interface, you can transmit the data to a PC or an external printer. Use the AK340/B (PC) or AK325/S (ext. printer) cable to connect the interface to the devices. The data output automatically switches to the RS232 interface. Warning The RS232 interface is not galvanically isolated. When connecting an earthed PC/printer, measurements cannot be performed in earthed media as incorrect values would result.
Oxi 1970i Operation 4.6 Configuration You can adapt the measuring instrument to your individual requirements. To do this, the following parameters can be changed (the status on delivery is marked in bold): Baud rate 1200, 2400, 4800, 9600 Air pressure display Current value in mbar (no input possible) Calibration interval (Int 3) 1 ... 14 ... 999 d AutoRange ARng On or off Date/time Any Note You can leave the configuration menu at any time with .
Operation Oxi 1970i Displaying the air pressure pH S O Sal Time C C AP Baud Day.Month Year No. Ident Tref25 LoBat nLF 6 d94 Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 9 °C% / K ARng TP REL1 REL2 AR RCL Confirm with . Int 3 appears on the display. Calibration interval pH S O Sal Time Int 3 Baud Day.Month Year No.
Oxi 1970i Operation Date and time pH S O Sal Time It 25 Baud Day.Month Year No. Ident Tref25 LoBat ba75691e01 01/2007 nLF 090 Tref20 Lin Oxi Auto Store Cal TEC mV/ pH % mg/l mS/cm 1/cm Sal 4 °C% / K ARng TP REL1 REL2 AR RCL 11 Set the date of the current day with <▲> <▼>. 12 Confirm with . The date (month) flashes in the display. 13 Set the current month with <▲> <▼>. 14 Confirm with . The year appears on the display.
Operation Oxi 1970i 4.7 Reset You can reset (initialize) the measurement parameters and the configuration parameters separately from one another. Measurement parameters The following measured parameters (O2 InI) are reset to the default condition: Measuring mode D. O. concentration AutoRange automatic measurement range selection On (YES) Relative slope 1.00 Correction factor of the relative slope 1.000 Salinity equivalent 0.
Oxi 1970i Operation Resetting the measuring parameters 1 Press the key and hold it down. 2 Press the key. pH S O Sal Time Iini Baud Day.Month Year No. Ident Tref25 LoBat Resetting the configuration parameters nLF Oxi Auto Store Cal TEC ARng TP REL1 REL2 AR RCL Using <▲> <▼>, switch between no and YES. YES: Resetting the measuring parameters no: Retaining settings. 4 Confirm with . The measuring instrument switches to the configuration parameters.
Operation 46 Oxi 1970i ba75691e01 01/2007
Oxi 1970i Maintenance, cleaning, disposal 5 Maintenance, cleaning, disposal 5.1 Maintenance The measuring instrument is maintenance-free. 5.2 Cleaning Occasionally wipe the outside of the measuring instrument with 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 and similar detergents that contain solvents. Remove any splashes immediately. 5.
Maintenance, cleaning, disposal Measuring instrument, 48 Oxi 1970i Dispose of the measuring instrument without the rechargeable battery as electronic waste at an appropriate collection point.
Oxi 1970i What to do if... 6 What to do if... Cause Remedy – Battery almost empty – Charge the battery (see section 3.2) Instrument does not react to keystroke Cause Remedy – Operating condition undefined or EMC load unallowed – Processor reset: Press the and keys at the same time and release them again. The software version is displayed.
What to do if...
Oxi 1970i What to do if... Message StoFull You want to know which software version is in the instrument ba75691e01 01/2007 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 and keys and release them again. The software version is displayed.
What to do if...
Oxi 1970i Technical data Test certificates Dimensions Weight Mechanical structure Electrical safety Ambient conditions Power supply 7 Technical data 7.1 General data cETLus, CE approx. 90 x 200 x 190 mm approx. 1.5 kg (without plug-in power supply) Type of protection: IP 67 Protective class: III Operation -10 °C ... + 55 °C Storage - 25 °C ... + 65 °C Climatic class 2 Rechargeable battery Nickel-cadmium (NiCad) rechargeable battery Operational life approx.
Technical data Serial interface Analog output (AK 323/ S cable) Oxi 1970i Automatic switchover when a PC or a printer is connected via the cable, AK 340/B or AK 325/S. Type RS232, data output Baud 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 Automatic switchover when the recorder is connected by the cable, AK 323/S. pH output signal -200 ... +1999 mV for the range - 2.00 ... + 19.
Oxi 1970i Technical data Internal resistance ba75691e01 01/2007 < 5 Ohm (current limited to max. 0.
Technical data Oxi 1970i Guidelines and norms used 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 EN 61010-1 A2:1995 Climatic class VDI/VDE 3540 IP protection EN 60529:1991 7.2 Measuring ranges, resolutions Accuracy (± 1 digit) Correction functions 56 Measuring ranges, resolutions, accuracies Note: The values given in brackets apply to the sensor DurOx 325 especially.
Oxi 1970i Technical data Air pressure correction ba75691e01 01/2007 Automatic through integrated pressure sensor in the range of 500 ...
Technical data 58 Oxi 1970i ba75691e01 01/2007
Oxi 1970i Lists 8 Lists This chapter provides additional information and orientation aids. Abbreviations Specialist terms Index The list of abbreviations explains the indicators and the abbreviations that appear on the display and in the manual. 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. The index helps you to find the topics that you are looking for.
Lists Oxi 1970i Abbreviations 60 AR AutoRead (drift control) ARng Automatic range switching Measuring instrument measures with highest resolution °C Temperature unit, degrees Celsius 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.
Oxi 1970i Lists Glossary Adjusting To manipulate a measuring system so that the relevant value (e. g. the displayed value) differs as little as possible from the correct value or a value that is regarded as correct, or that the difference remains within the tolerance. Amperometry Name of a measuring technique. The signal (depending on the measured parameter) of the sensor is the electric current. The electrical voltage remains constant.
Lists Oxi 1970i Salinity Salt content Sample Slope Slope (relative) Standard solution 62 The absolute salinity SA of seawater corresponds to the relationship of the mass of dissolved salts to the mass of the solution (in g/Kg). In practice, this dimension cannot be measured directly. Therefore, the practical salinity is used for oceanographic monitoring. It is determined by measuring the electrical conductivity. General designation for the quantity of salt dissolved in water.
Oxi 1970i Index Index A M Analog output . Authorized use AutoRange . . . AutoRead . . . Criteria . . . . . . . . . . . . . . . . . . . . . 39 ................... 9 . . . . . . . . . . . . . . . . . . 18 . . . . . . . . . . . . . . . . . . 19 . . . . . . . . . . . . . . . . . . 19 Mains operation . . . . . . . . . . . . Measuring range selection . . . . . Measuring the D. O. concentration Measuring the D. O. saturation . . . . . . . .11 . . . . . .18 . . . . . .17 . . . . . .
Index 64 Oxi 1970i ba75691e01 01/2007
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