wtw Cond 1970i Operating Manual
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wtw Cond 1970i Operating Manual

Portable conductivity measuring instrument
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Operating manual
Cond 1970i
Portable conductivity measuring instrument
ba75692e02
07/2009

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  • Page 1 Operating manual Cond 1970i Portable conductivity measuring instrument ba75692e02 07/2009...
  • Page 2 © Copyright Weilheim 2009, WTW GmbH Reproduction in whole - or even in part - is prohibited without the ex- press written permission of WTW GmbH, Weilheim. Printed in Germany. ba75692e02 07/2009...

  • Page 3: Table Of Contents

    Contents Cond 1970i - Contents Overview ........5 Display .
  • Page 4 Contents Cond 1970i 4.6.3 PC/external printer (RS232 interface) ..45 4.6.4 Remote control ......45 Configuration .

  • Page 5: Overview

    Cond 1970i Overview Overview The portable Cond 1970i measuring instrument enables you to carry out conductivity measurements rapidly and reliably. The Cond 1970i provides the maximum degree of operating comfort, reliability and measuring certainty for all applications. The proven procedures to determine or set up the cell constant support you in your work with the measuring instrument.

  • Page 6: Display

    If you need further information or application notes, you can obtain the following material from WTW: Application reports Primers Safety datasheets. You will find information on available literature in the WTW catalog or via the Internet. Display Status display indicator Sensor symbol...

  • Page 7: Keypad

    Cond 1970i Overview Keypad Key functions Switch measuring instrument on/off ON / OFF <ON/OFF> Select the measuring mode <M>: – Conductivity – Salinity – Total dissolved solids (TDS) – Determine or set up the cell constant – Select temperature compensation <CAL>...

  • Page 8: Socket Field

    Overview Cond 1970i Socket field Sensors You can use the following sensors with the Cond 1970i: Conductivity depth armature Conductivity measuring cell Option: External temperature sensor Connectors Sensor / Instrument Socket Conductivity measuring cell or depth armature Temperature sensor, external...

  • Page 9: Safety

    Cond 1970i Safety Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and maintenance of the conduc- tivity measuring instrument. Consequently, all responsible personnel must read this operating manual before working with the measuring system.

  • Page 10: General Safety Instructions

    Safety Cond 1970i General safety instructions This instrument is built and inspected according to the relevant guide- lines and norms for electronic measuring instruments (see chapter ECHNICAL DATA It left the factory in a safe and secure technical condition. Function and operating...

  • Page 11: Commissioning

    Cond 1970i Commissioning Commissioning Scope of delivery Portable measuring instrument, Cond 1970i with integrated re- chargeable battery Carrying and positioning handle Carrying strap Sensor quiver Plug-in power supply unit Operating manual Power supply Mains operation and You can either operate the measuring instrument with the integrated re- charging the battery chargeable battery or with the plug-in power supply.

  • Page 12: Initial Commissioning

    Connecting the plug-in power supply unit Connect the plug (1) to the socket (2) of the measuring instru- ment. Connect the original WTW plug-in power supply (3) to an easily accessible mains socket. Initial commissioning Perform the following activities: For mains operation and charging the battery: Connect the plug-in power supply (see section 3.2 P...
  • Page 13 Cond 1970i Commissioning mg/l Time Baud 0 9 0 4 ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Set the date of the current day with <▲> <▼>. Confirm with <RUN/ENTER>. The date (month) flashes in the display.

  • Page 14: Sensor Quiver

    Commissioning Cond 1970i Sensor quiver To store the sensors during field operation and to keep the sensor ele- ment 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.

  • Page 15: Operation

    Cond 1970i Operation Operation Switching on the measuring instrument Connect a conductivity measuring cell to the measuring instru- ment. Press the <ON/OFF> key. The display test appears briefly on the display. Subsequently, the selected cell constant and the temperature compensation that was set up appear for approx. one second one after the other.

  • Page 16: Measuring

    Operation Cond 1970i Measuring 4.2.1 General information You can measure the following variables: Conductivity Salinity Total dissolved solids (TDS) The measuring instrument is supplied with the following functions: 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.
  • Page 17 Cond 1970i Operation Measuring the For the temperature compensation, it is required to measure the tem- temperature perature of the test sample. You have the following possibilities of measuring the temperature: The temperature sensor integrated in the sensor measures the tem- perature automatically (example: TetraCon 325).

  • Page 18: Conductivity

    Operation Cond 1970i 4.2.2 Conductivity You can carry out the conductivity measurements as follows: Perform the preparatory activities according to section 4.2.1. Immerse the conductivity measuring cell in the test sample. Press the <M> key until appears in the status display. De-...

  • Page 19: Tds (Total Dissolved Solids)

    Cond 1970i Operation 4.2.4 TDS (Total dissolved solids) You can measure the total dissolved solids as follows: Perform the preparatory activities according to section 4.2.1. Immerse the conductivity measuring cell in the test sample. Press the <M> key until the unit mg/l appears.

  • Page 20: Autoread Ar (Drift Control) And Hold Function

    Operation Cond 1970i 4.2.5 AutoRead AR (drift control) and hold function The AutoRead function (drift control) checks the stability of the mea- surement signal. The stability has a considerable impact on the repro- ducibility of the measured values. With the aid of the hold function the measured value display is frozen.

  • Page 21: Determining/Setting Up The Cell Constant [C]

    Cond 1970i Operation Determining/setting up the cell constant [C] Why determine/set up Aging slightly changes the characteristics of the cell, e. g. by coatings. the cell constant? As a result, an inexact measured value is displayed. The original char- acteristics of the cell can often be restored by cleaning the cell. Calibra- tion determines the current cell constant and stores it in the instrument.
  • Page 22 Operation Cond 1970i Printing the The calibration protocol contains the calibration data of the current cal- calibration protocol ibration. You can transmit the calibration protocol to a printer via the se- rial interface (see page 39). Note You can automatically print a calibration protocol after the calibration.

  • Page 23: Determining The Cell Constant (Calibrating)

    Cond 1970i Operation 4.3.1 Determining the cell constant (calibrating) Note This method of automatically determining the cell constant by calibra- tion with the 0.01 mol/l KCL standard solution can only be used for measuring cells with cell constants in the range 0.450 ... 0.500 cm 0.800 ...
  • Page 24 Operation Cond 1970i Press the <RUN/ENTER> key. – If no temperature sensor is connected, enter the current temperature of the solution with <▲> <▼> and confirm with <RUN/ENTER>. – If a temperature sensor is connected, the AR measurement to determine the cell constant starts.

  • Page 25: Setting The Cell Constant Manually

    Cond 1970i Operation 4.3.2 Setting the cell constant manually Note The cell constant to be set must either be taken from the operating manual of the measuring cell or is printed on the measuring cell. You can set the cell constant manually as follows: Setting the fixed cell You can set the fixed value 0.010 cm...
  • Page 26 Operation Cond 1970i Range Press the <CAL> key repeatedly until CELL appears on the 0.090 ... 0.110 cm display. C T 1 mg/l Time Baud E L L ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Press the <RUN/ENTER>...
  • Page 27 Cond 1970i Operation Range Press the <CAL> key repeatedly until CELL appears on the 0.250 ... 2.500 cm display. C T 1 mg/l Time Baud E L L ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Press the <RUN/ENTER>...

  • Page 28: Setting The Temperature Compensation Tc

    Operation Cond 1970i Setting the temperature compensation TC The calculation of the temperature compensation is based on the pre- set reference temperature, 20 °C or 25 °C. It appears on the display as Tref20 or Tref25. To switch over the reference temperature, see section 4.7 C...

  • Page 29: Selecting The Nonlinear Temperature Compensation

    Cond 1970i Operation 4.4.1 Selecting the nonlinear temperature compensation You can select the nonlinear temperature compensation as follows: Press the <CAL> key repeatedly until tc appears on the dis- play. C T 1 mg/l Time Baud ° Day.Month Year Ident...

  • Page 30: Selecting The Linear Temperature Compensation

    Operation Cond 1970i 4.4.2 Selecting the linear temperature compensation You can select the linear temperature compensation as follows: Press the <CAL> key repeatedly until tc appears on the dis- play. C T 1 mg/l Time Baud ° Day.Month Year Ident...

  • Page 31: Switching The Temperature Compensation Off

    Cond 1970i Operation 4.4.3 Switching the temperature compensation off You can switch off the temperature compensation as follows: Press the <CAL> key repeatedly until tc appears on the dis- play. C T 1 mg/l Time Baud ° Day.Month Year Ident...

  • Page 32: Saving

    Operation Cond 1970i Saving The measuring instrument has an internal data memory. It can store up to 500 datasets. A complete data record consists of: Storage location Date/time Measured value Temperature Temperature measuring procedure ID number You can transmit measured values (data records) to the data storage...
  • Page 33 Cond 1970i Operation mg/l Time Baud ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Using <▲> <▼>, enter the required ID number (1 ... 999). Confirm with <RUN/ENTER>. The instrument changes to the measuring mode. StoFull...

  • Page 34: Saving Automatically

    Operation Cond 1970i 4.5.2 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 transmit- ted to the storage and to the interface. The default setting for the save interval (Int 1) is OFF.
  • Page 35 Cond 1970i Operation Confirm with <RUN/ENTER>. The prompt for the ID number appears on the display. mg/l Time Baud ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Set the required ID number with <▲> <▼>. Confirm with <RUN/ENTER>.

  • Page 36: Outputting The Data Storage

    Operation Cond 1970i 4.5.3 Outputting the data storage You can output the contents of the data storage: Stored data on the display Calibration data on the display Stored data on the serial interface Calibration protocol on the interface Outputting stored data Press the <RCL>...
  • Page 37 Cond 1970i Operation Note If you want to search for a certain element (e.g. date), proceed as fol- lows: Using <RUN/ENTER>, select the element (e.g. date). Press <▲> or <▼> repeatedly until the required date appears on the display. After approx. 2 s the temperature of the displayed measured value appears.
  • Page 38 Operation Cond 1970i Sample printout: Device No.: 99990000 01.01.02 00:04 2.40 mS/cm °C Tman Tref25 C = 0.475 1/cm Ident : 1 10.01.02 10:09 2.40 mS/cm 25.3 °C Tauto Tref25 C = 0.475 1/cm Ident : 1 12.01.02 01:48 2.40 mS/cm 21.6 °C...
  • Page 39 Cond 1970i Operation mg/l Time Baud 4 7 5 ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Using <M> or <RUN/ENTER>, you can switch back to the measuring mode. Outputting the Press the <RCL> key repeatedly until CAL SEr appears on the calibration protocol display.

  • Page 40: Clearing The Memory

    Operation Cond 1970i 4.5.4 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 automati- cally switches to the measuring mode.

  • Page 41: Transmitting Data

    Cond 1970i Operation Transmitting data You have the following possibilities of transmitting data: One of the following options: – With the AutoStore function (page 34), measured values are periodically saved internally (save interval Int 1) and output on the interface.
  • Page 42 Operation Cond 1970i Setting the The default setting for the interval is OFF. Data transmission To start the data transmission, set an interval (5 s, 10 s, 30 s, 1 min, 5 interval min, 10 min, 15 min, 30 min, 60 min): Press the <RUN/ENTER>...

  • Page 43: Recorder (Analog Output)

    Cond 1970i Operation 4.6.2 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. 1 free...
  • Page 44 Operation Cond 1970i Measuring range Voltage Resolution 0 ... 1999 mg/l 0 ... 1999 mV 1 mV ba75692e02 07/2009...

  • Page 45: Pc/External Printer (Rs232 Interface)

    Cond 1970i Operation 4.6.3 PC/external printer (RS232 interface) Via the RS 232 interface, you can transmit the data to a PC or an ex- ternal printer. Use the AK340/B (PC) or AK325/S (ext. printer) cable to connect the interface to the devices.

  • Page 46: Configuration

    Operation Cond 1970i Configuration You can adapt the measuring instrument to your individual require- ments. To do this, the following parameters can be changed (the status on delivery is marked in bold): Baud rate 1200, 2400, 4800, 9600 Calibration interval (Int 3) 1 ...
  • Page 47 Cond 1970i Operation Calibration interval mg/l Time Baud ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Set the required interval in days (d) with <▲> <▼>. Confirm with <RUN/ENTER>. ARng appears on the display. AutoRange automatic...
  • Page 48 Operation Cond 1970i Date and time mg/l Time Baud 0 9 0 4 ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Set the date of the current day with <▲> <▼>. Confirm with <RUN/ENTER>. The date (month) flashes in the display.

  • Page 49: Reset

    Cond 1970i Operation Reset You can reset (initialize) the measurement parameters and the config- uration parameters separately from one another. Measurement The following measured parameters ( InI) are reset to the default parameters condition: Measuring mode Cell constant 0.475 cm (calibrated) 0.475 cm...
  • Page 50 Operation Cond 1970i Resetting the Press the <RUN/ENTER> key and hold it down. measuring parameters Press the <CAL> key. mg/l Time Baud ° Day.Month Year Ident Tref25 Tref20 Auto Store REL1 REL2 LoBat ARng Using <▲> <▼>, switch between no and YES.

  • Page 51: Maintenance, Cleaning, Disposal

    Cond 1970i Maintenance, cleaning, disposal Maintenance, cleaning, disposal Maintenance The measuring instrument is maintenance-free. Cleaning Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with isopropanol as re- quired. Warning The housing components are made out of synthetic materials (polyurethane, ABS and PMMA).
  • Page 52 Maintenance, cleaning, disposal Cond 1970i Measuring instrument, Dispose of the measuring instrument without the rechargeable battery as electronic waste at an appropriate collection point. ba75692e02 07/2009...

  • Page 53: What To Do If

    Cond 1970i What to do if... What to do if... Cause Remedy Display LoBat – Battery almost empty – Charge the battery (see section 3.2) Instrument does not Cause Remedy react to keystroke – Operating condition undefined – Processor reset: or EMC load unallowed Press the <RCL>...
  • Page 54 – Output data storage and clear data storage You want to know which Cause Remedy software version is in – E. g., a question by the WTW – Simultaneously press the the instrument service department <CAL> and <ON/OFF> keys and release them again. The software version is displayed.

  • Page 55: Technical Data

    Cond 1970i Technical data Technical data General data Test certificates cETLus, CE Dimensions approx. 90 x 200 x 190 mm Weight approx. 1.5 kg (without plug-in power supply) Mechanical structure Type of protection: IP 67 Electrical safety Protective class: Ambient...
  • Page 56 Technical data Cond 1970i Serial interface 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...
  • Page 57 Cond 1970i Technical data Climatic class VDI/VDE 3540 IP protection EN 60529:1991 ba75692e02 07/2009...

  • Page 58: Measuring Ranges, Resolutions, Accuracies

    Technical data Cond 1970i Measuring ranges, resolutions, accuracies Measuring ranges and Variable Measuring range Resolution resolutions [µS/cm] 0.000 ... 1.999 * 0.001 0.00 ... 19.99 ** 0.01 0.0 ... 199.9 0 ... 1999 [mS/cm] 0.00 ... 19.99 0.01 0.0 ... 199.9 0 ...
  • Page 59 0 °C ... + 35 °C according to EN 27 888 ± 0.5 % + 35 °C ... + 50 °C Extended nLF function according to WTW mea- surements Linear ± 0.5 % + 10 °C ... + 75 °C SAL / Range 0.0 ...
  • Page 60 Technical data Cond 1970i ba75692e02 07/2009...

  • Page 61: Lists

    Cond 1970i Lists Lists This chapter provides additional information and orientation aids. Abbreviations The list of abbreviations 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.
  • Page 62 Lists Cond 1970i Abbreviations Conductivity value (international γ) AutoRead (drift control) ARng Automatic range switching Measuring instrument measures with highest reso- lution Cell constant [cm ] (internat. k) °C Temperature unit, degrees Celsius Calibration Initialization Resets individual basic functions to the status they...
  • Page 63 AutoRange Name of the automatic selection of the measuring range. AutoRead WTW name for a function to check the stability of the measured value. Calibration Comparing the value from a measuring system (e. g. the displayed value) to the correct value or a value that is regarded as correct. Of- ten, this expression is also used when the measuring system is adjust- ed at the same time (see adjusting).
  • Page 64 Lists Cond 1970i Salinity The absolute salinity S 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 deter- mined by measuring the electrical conductivity.
  • Page 65 Cond 1970i Index Index ....43 ......53...
  • Page 66 Index Cond 1970i ba75692e02 07/2009...
  • Page 67 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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