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wtw inoLab Cond 730 Operating Manual

Laboratory conductivity meter
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Summary of Contents for wtw inoLab Cond 730

  • Page 2 Copyright Weilheim 2004, WTW GmbH © Reprinting - even as excerpts - is only allowed with the explicit written authorization of WTW GmbH, Weilheim. Printed in Germany.

  • Page 3: Table Of Contents

    Cond 730 Contents Overview ....... 5 1.1 Keyboard ......6 1.2 Display .
  • Page 4 Contents Cond 730 Maintenance, cleaning, disposal... 59 5.1 Maintenance......59 5.1.1 Changing the batteries .

  • Page 5: Overview

    The compact inoLab Cond 730 precision conductivity meter lets you perform conductivity measurements rapidly and reli- ably. The inoLab Cond 730 provides the highest degree of oper- ating comfort, reliability and measuring safety for all applica- tions. The integrated printer* enables the measurements to be documented in compliance with GLP.

  • Page 6: Keyboard

    Overview Cond 730 Keyboard 1 Select measuring mode 2 Set up or determine cell constant; select temperature compensation 3 Print LED * Red: printer off (offline) or malfunction Green: printer ready for operation (online) 4 Printer on/off * 5 Paper feed/line feed * (Only with the printer being off - Print LED lights up red) 6 Reduce values, scroll...

  • Page 7: Display

    Plug-in power supply Caution Only connect measuring cells to the instrument that cannot feed excessive voltages or currents (> SELV and > circuit with current limiter). Almost all commercial measuring cells - especially WTW measuring cells - meet these require- ments.
  • Page 8 Overview Cond 730...

  • Page 9: Safety

    Cond 730 Safety Safety This operating manual contains basic instructions that you must follow during the commissioning, operation and main- tenance of the instrument. Consequently, all responsible personnel must read this operating manual before working with the instrument. The operating manual must always be available within the vicinity of the instrument.

  • Page 10: Authorized Use

    In this event, wait until the temperature of the instrument reaches room tem- perature before putting the instrument back into operation. Caution The instrument is only allowed to be opened by personnel authorized by WTW.
  • Page 11 Cond 730 Safety 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 instrument has been damaged in transport the instrument has been stored under adverse conditions for a lengthy period of time the instrument is visibly damaged the instrument no longer operates as described in this...
  • Page 12 Safety Cond 730...

  • Page 13: Commissioning

    Cond 730 Commissioning Commissioning Scope of delivery Laboratory measuring instrument, inoLab Cond 730 Plug-in power supply Operating manual and short manual 4 x type AA Mignon 1.5 V batteries Initial commissioning Perform the following activities: Set the date and time Connect the plug-in power supply (for printer functions).
  • Page 14 Commissioning Cond 730 12 Set the current time by pressing 13 Confirm with . The measuring instrument then switches to the measuring mode. 14 Switch off the instrument by pressing Connecting the The measuring instrument works battery-powered. It can, plug-in power however, also be supplied by the plug-in power supply supply which is available as an accessory.
  • Page 15 Cond 730 Commissioning 2 Connect the original WTW plug-in power supply (3) to an easily accessible mains socket. 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 sup-...
  • Page 16 Commissioning Cond 730...

  • Page 17: Operation

    Cond 730 Operation Operation Switch on the instrument 1 Place the instrument on a flat surface and protect it against intense light and heat. 2 Connect the conductivity measuring cell to the instrument. 3 Press the key. The display test appears briefly on the display. The instrument then switches automatically to the previously selected measuring mode.
  • Page 18 Operation Cond 730 Checking the cell 1 Press the key repeatedly until LF CELL is constant displayed. 2 Press the key. The previously selected cell constant ist displayed, e. g. 0.475 cm 3 To return to the measuring mode: press the when the correct cell constant ist displayed.

  • Page 19: Measuring

    Measurements can be performed with and without a temper- ature probe. A connected temperature probe is indicated by TP on the display. If you want to use a WTW conductivity measuring cell with- out a temperature probe, you have to connect it with an adapter (available at WTW).
  • Page 20 Operation Cond 730 AutoRead AR The AutoRead function (drift control) checks the stability of (Drift control) the measurement signal. The stability has a considerable ef- fect on the reproducibility of the measured value. Call up the measuring mode by pressing 2 Activate the AutoRead function by pressing The current measured value is frozen (Hold function).

  • Page 21: Conductivity / Specific Resistance

    Cond 730 Operation 4.2.1 Conductivity / Specific resistance Note You can display measured values in the units µS/cm (con- ductivity) or MΩ·cm (specific resistance). This setting is de- scribed in Abschnitt 4.7 C ONFIGURATION Thus, you can carry out conductivity measurements or mea- surements of the specific resistance: 1 Perform the preparatory activities according to section 4.2.

  • Page 22: Salinity

    Operation Cond 730 4.2.2 Salinity To measure the salinity, proceed as follows: 1 Perform the preparatory activities according to section 4.2. 2 Immerse the conductivity measuring cell into the test sample. 3 Press the key repeatedly until Sal appears in the status line.

  • Page 23: Tds (Total Dissolved Solids)

    Cond 730 Operation 4.2.3 TDS (total dissolved solids) To measure the TDS, proceed as follows: 1 Perform the preparatory activities according to section 4.2. 2 Immerse the conductivity measuring cell into the test sample. 3 When measuring with an integrated temperature probe continue with step 4.

  • Page 24: Printing/Transmitting Measured Values

    Operation Cond 730 4.2.4 Printing/transmitting measured values Measured values (data records) can be: printed on the integrated printer* or transmitted to the interface Note To print, you must switch on the printer using the Print key (Print LED lights up green)*. To transmit to the interface, you must connect the interface cable.

  • Page 25: Determining/Setting Up The Cell Constant [C]

    Cond 730 Operation Determining/setting up the cell constant [C] Why determine/set Due to ageing, the cell constant slightly changes. As a up the cell result, an inexact measured value is displayed. Calibration constant? determines the current value of the cell constant and stores this value in the instrument.
  • Page 26 Operation Cond 730 4 Immerse the measuring cell into the 0.01 mol/l KCL control standard. 5 Press the key. – If no temperature probe is connected, enter the current temperature of the solution using and confirm with – If a temperature probe is connected, the AR measurement to determine the cell constant starts.
  • Page 27 Cond 730 Operation Note This method of automatically determining the cell constant by calibrating in the 0.01 mol/l KCL control standard can only be used for measuring cells with a cell constant in the range 0.450 ... 0.500 cm or 0.800 ... 1.200 cm Calibration After calibrating, the instrument automatically evaluates the evaluation...
  • Page 28 Operation Cond 730 Calibration interval The flashing sensor symbol reminds you to calibrate regu- (Int 3) larly. After the selected calibration interval (Int 3) expires, the sensor symbol flashes. Measurements can continue. Note To ensure the high measuring precision of the measuring system, perform a calibration after the calibration interval expires.

  • Page 29: Setting The Cell Constant Manually

    Cond 730 Operation 4.3.2 Setting the cell constant manually Note The cell constant to be set up must either be taken from the operating manual of the measuring cell or is printed on the measuring cell. You can set the the cell constant manually as follows: Setting the fixed cell 1 Press the key repeatedly until CELL appears on...
  • Page 30 Operation Cond 730 Range 1 Press the key repeatedly until CELL appears on 0.090 ... 0.110 cm the display. 2 Press the key. 3 Press the key repeatedly until a cell constant in the range 0.090 ... 0.110 cm appears. 4 Set the cell constant to be used with e.g.
  • Page 31 Cond 730 Operation Range 1 Press the key repeatedly until CELL appears on 0.250 ... 2.500 cm the display. 2 Press the key. 3 Press the repeatedly until until a cell constant in the range 0.250 ... 2.500 cm appears. 4 Set the cell constant to be used with e.g.

  • Page 32: Setting Up The Temperature Compensation Tc

    Operation Cond 730 Setting up the temperature compensation TC The calculation of the temperature compensation is based on the preset reference temperature, Tref 20 or Tref 25 (see section 4.7 C ONFIGURATION You can select one of the following temperature compensa- tions: Non-linear temperature compensation "nLF"...
  • Page 33 Cond 730 Operation Selecting the non- To select the non-linear temperature compensation proceed linear temperature as follows: compensation 1 Press the key repeatedly until LF tc appears on the display. 2 Press the key. 3 Press the key repeatedly until nLF appears on the display.
  • Page 34 Operation Cond 730 Selecting the linear To select the linear temperature compensation proceed as temperature follows: compensation 1 Press the key repeatedly until LF tc appears on the display. 2 Press the key. 3 Press the key repeatedly until the adjustable linear temperature coefficient appears on the display.
  • Page 35 Cond 730 Operation Switching off the To switch off the temperature compensation proceed as fol- temperature lows: compensation 1 Press the key repeatedly until LF tc appears on the display. 2 Press the key. 3 Press the key repeatedly until the following display appears: 4 The temperature compensation has been switched off.

  • Page 36: Storing

    Operation Cond 730 Storing The conductivity meter has an internal data storage device. Up to 800 data records can be stored in it. A complete data record consists of: Memory location Date Time Measured value Temperature I.D. number You can transmit measured values (data records) to the data storage in 2 ways: Manual storage Switching on the AutoStore function (Int 1), see page 38.
  • Page 37 Cond 730 Operation 2 Confirm with The display changes to the input of the I.D. number. 3 Enter the required I.D. number (1 ... 999) by pressing 4 Confirm with The instrument changes to the measuring mode. StoFull StoFull StoFull StoFull message This message appears if all 800 memory locations are full.

  • Page 38: Switching On Autostore (Int 1)

    Operation Cond 730 4.5.2 Switching on AutoStore (Int 1) The storage interval (Int 1) determines the time interval between automatic storage processes. After the time interval expires, the current data record is transmitted to the data storage and to the printer/interface. The storage interval (Int 1) is set to OFF in the factory.
  • Page 39 Cond 730 Operation 5 As soon as all 800 memory locations are full, the AutoStore function is terminated (Int 1 = OFF). If too few storage locations are available for your measurements: – backup the data storage (see page 40) and –...

  • Page 40: Outputting The Data Storage

    Operation Cond 730 Note The AutoStore function is interrupted if you perform other functions, e.g. output data storage. After completing the other function, the AutoStore function continues. However, as a result, gaps can occur in the recording of the measured values. Switching off the Switch off the AutoStore function by: AutoStore...
  • Page 41 Cond 730 Operation 3 After 2 s the respective temperature of the data record appears on the display. Stored data records are displayed together with the RCL display indicator. You can perform the following activities: Display further parameters of the data record Press (I.D.
  • Page 42 Operation Cond 730 Note If you want to find a specific parameter (e.g. date), proceed as follows: 1 Press the key repeatedly until Sto disp appears on the display. 2 Press the key. A measured value appears on the display. The I.
  • Page 43 Cond 730 Operation Outputting to the 1 Press the key repeatedly until Sto SEr appears interface on the display. 2 Press the key. The protocol of the last calibration is transmitted to the printer/RS interface. In the meantime, Sto CAL appears on the display.
  • Page 44 Operation Cond 730 Sample printout CALIBRATION PROTOCOL 14.04.99 11:37 Device No.: 99990000 CALIBRATION CONDUCTIVITY Cal Time: 14.04.99 / 11:37 Cal Interval: 180d Cal Std.: 0.01 mol/l KCL 23.0 °C Conduct./Tref25: 1413 µS/cm Cell Const : 0.975 1/cm Probe: 01.01.99 00:04 2.40 mS/cm °C Tman...
  • Page 45 Cond 730 Operation Contents of the measuring storage: – Number of the storage location (No.) – Date/time of measurement – Measured value/unit (mS/cm) [°C/F] – Automatic/manual temperature measurement (Tauto/Tman) – Temperature compensation (nLF) – Tref – Cell constant (1/cm) – AutoRead function (AR) –...

  • Page 46: Clearing The Storage

    Operation Cond 730 4.5.4 Clearing the storage This function can erase the stored data records. 800 mem- ory locations will then become available again. Note The Clear store function only appears if data records have already been stored in the storage. Otherwise, the conduc- tivity meter automatically changes to the measuring mode.

  • Page 47: Data Transmission

    Cond 730 Operation Data transmission You can use the following options to transmit data: One of the following options: – The AutoStore function (page 38) is used to periodically (Int 1 storage interval) save measured values internally and output them on the printer/ interface.
  • Page 48 Operation Cond 730 Setting the The interval is set to OFF in the factory. data transmission To start the data transmission, set up an interval (5 s, 10 s, interval 30 s, 1 min, 5 min, 10 min, 15 min, 30 min, 60 min): 1 Press and hold down the key.

  • Page 49: Recorder (Analog Output)

    Cond 730 Operation 4.6.2 Recorder (analog output) You can transmit the data to a recorder via the analog out- put. Connect the analog output to the recorder via the AK323 interface cable. The data output switches automatically to recorder output. 1 Free Socket assignment 2 Plug coding...

  • Page 50: Pc/External Printer (Rs232 Interface)

    Operation Cond 730 4.6.3 PC/external printer (RS232 interface) You can transmit data to a PC or an external printer via the RS232 interface. Connect the interface to the instrument via the AK340/B cable (PC) or AK325/S cable (external printer). The data output switches automatically to RS232. Note The RS232 interface is not galvanically isolated.

  • Page 51: Operation With Multilab Pilot

    Cond 730 Operation 4.6.4 Operation with MultiLab pilot With the aid of the MultiLab pilot software, you can record and evaluate measuring data with a PC. The data is trans- mitted after the measuring instrument is connected to the RS232 serial interface (COM interface) of a PC. Note More detailed information can be found in the MultiLab pilot operating manual.

  • Page 52: Configuration

    Operation Cond 730 Configuration You can adapt the conductivity meter to your individual requirements. To do this, the following parameters can be called up/changed (the status on delivery is marked in bold): Baud rate 1200, 2400, 4800, 9600 Data transmission inter- OFF, 5 s, 10 s, 30 s, 1 min, val (Int 2) 5 min, 10 min, 15 min, 30 min,...
  • Page 53 Cond 730 Operation Baud rate 4 Set up the required baud rate by pressing 5 Confirm with . Int 2 appears on the display. Data transmission interval 6 Set up the required time interval by pressing 7 Confirm with . Int 3 appears on the display. Calibration interval 8 Set up the required time interval by pressing...
  • Page 54 Operation Cond 730 ARng (AutoRange) 10 With select between YES and no. 11 Confirm with . t25 appears on the display. Reference temperature 12 With select between t25 and t20 13 Confirm with . LF appears on the display. Conductivity 14 With select between S/cm and M Ω.
  • Page 55 Cond 730 Operation Temperature unit 16 Select between °C and °F by pressing 17 Confirm with The date flashes on the display. Date and time 18 Set today’s date by pressing 19 Confirm with The date (month) flashes on the display. 20 Set the current month by pressing 21 Confirm with The year appears on the display.
  • Page 56 Operation Cond 730 22 Set the current year by pressing 23 Confirm with The hours flash on the display 24 Set the current time by pressing 25 Confirm with The minutes flash on the display. 26 Set the current time by pressing 27 Confirm with The instrument changes automatically to the conductivity measuring mode.

  • Page 57: Reset

    Cond 730 Operation Reset You can reset (initialize) measuring and configuration parameters separately from one another. Measuring The following measuring parameters (Cond InI) are reset to parameters the values they had on delivery: Measuring mode Cell constant 0.475 cm (calibrated) 0.475 cm (set up) Temperature...
  • Page 58 Operation Cond 730 Resetting 1 Press and hold down the key. measuring 2 Press the key. parameters 3 Use to toggle between no and YES. yes: reset measuring parameters. no: retain settings. 4 Confirm with The instrument changes to the configuration parameters.

  • Page 59: Maintenance, Cleaning, Disposal

    Cond 730 Maintenance, cleaning, disposal Maintenance, cleaning, disposal Maintenance The maintenance tasks are restricted to the following activi- ties: replacing the batteries and replacing the roll of printer paper*. Note See the relevant operating manual of the measuring cell for instructions on maintenance.

  • Page 60: Changing The Batteries

    Maintenance, cleaning, disposal Cond 730 5.1.1 Changing the batteries 1 Open the battery compartment (1) on the underside of the instrument. 2 Remove the four batteries from the battery compartment. 3 Insert four new batteries (Type Mignon AA) into the battery compartment.

  • Page 61: Replacing The Roll Of Printer Paper

    – Press the Print key (paper feed). 5 Close the lid of the printer (1). Note Only use original WTW rolls of printer paper. Information on this is given in the WTW catalog, L ABORATORY AND IELD or via the Internet.

  • Page 62: Cleaning

    Maintenance, cleaning, disposal Cond 730 Cleaning Occasionally wipe the outside of the measuring instrument with a damp, lint-free cloth. Disinfect the housing with iso- propanol as required. Caution The housing is made of synthetic material (ABS). Thus, avoid contact with acetone or similar detergents that contain solvents.

  • Page 63: What To Do If

    Cond 730 What to do if... What to do if... Cause Remedy Error message, The measured value is out- side the measuring range – Measuring cell not – Connect measuring cell connected – Cable broken – Replace electrode Cause Remedy Error message, E3 E3 E3 E3 –...
  • Page 64 What to do if... Cond 730 You would like to Cause Remedy know which – e.g. question of the WTW – Press the key and software version is service department switch on instrument. in the instrument The software version is displayed.
  • Page 65 Cond 730 What to do if... Integrated printer Cause Remedy does not print * – Printer switched off – Switch on printer – No mains power supply – Connect mains power connected supply – Interface cable connected – Unplug cable –...
  • Page 66 What to do if... Cond 730...

  • Page 67: Technical Data

    Cond 730 Technical data Technical data Storage tempera- - 25 °C ... + 65 °C Ambient ture temperature Operating temper- 0 °C ... + 55 °C ature Allowable relative Annual mean: < 75 % humidity 30 days/year: 95 % Other days: 85 % [µS/cm] 0.000 ...
  • Page 68 ± 0.5 % 0 °C ... 35 °C according to EN 27 888; ± 0.5 % 35 °C ... 50 °C extended nLF function according to WTW measurements Linear compensation Accuracy Test sample temperature ± 0.5 % 10 °C ... 75 °C...
  • Page 69 Cond 730 Technical data Cell constant, C [cm 0.010 to be set 0.090 ... 0.110 0.250 ... 2.500 Cell constant, C [cm 0.450 ... 0.500 calibrated 0.800 ... 1.200 Reference tempera- [°C] ture, selectable Temperature input Manual [°C] - 5 ... +100 Dimensions and Length [mm] weight...
  • Page 70 Technical data Cond 730 Analog output Automatic switch-over when the AK 323 recorder cable is connected. Signal range 0 ... 1,999 V for the range 0 ... 1999 digits Accuracy ± 0,5 % of diplayed value ± 0,1 (% saturation) ±...
  • Page 71 Cond 730 Technical data Batteries 4 x 1.5 V Energy supply AA type alkaline manganese batter- Runtime Approx. 3000 operating hours Power supply Plug-in power supply (Connection max. overvoltage category II) Plug-in power supply unit (Euro, US, UK, Australian plug) FRIWO FW7555M/09, 15.1432 Friwo Part.
  • Page 72 Technical data Cond 730 FCC Class A Equipment Statement Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.

  • Page 73: Lists

    Cond 730 Lists Lists This chapter provides additional information and orientation aids. Abbreviations The list of abbreviations 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.
  • Page 74 Lists Cond 730 Abbreviations Conductivity value Plastic housing AutoRead (drift control) ARng Automatic range switching Measuring instrument measures with high- est resolution AutoStore Automatic storing Baud Baud rate Cell constant cm Calibration CELL Cell constant disp Display Output of the data storage on the display Error message (see chapter 6 W ...)
  • Page 75 Cond 730 Lists Sto disp Output of the data storage on the display Sto Full Memory full Sto SEr Output of the data storage to the printer/ interface Tauto Automatic temperature measurement Temperature coefficient Total dissolved solids Temperature Probe Temperature measurement active Tref 20/T20 Reference temperature 20 °C Tref 25/T25...
  • Page 76 Lists Cond 730 Glossary AutoRead Monitors the electrode drift and releases the measured value only after the stability criterion has been reached. In this way, this procedure ensures the highest degree of pre- cision and reproducibility. Calibration The cell constant is determined through calibration. To do so, the conductivity measuring cell is immersed into a series of aqueous salt solutions with exactly known electric con- ductivity.
  • Page 77 Cond 730 Lists Resistance All substances (solids, liquids, or gases) with mobile charge carriers like for example electrons or ions have a finite ohmic resistance, which means they have an electric conductance that can be measured or an electric conducitivtiy. Salinity The salinity is a sum parameter especially for seawater;...
  • Page 78 Lists Cond 730...
  • Page 79 Cond 730 Lists Index initialize ..... . 57 interval analog output ....49 calibration (Int 3) .
  • Page 80 Lists Cond 730 recorder output ....49 reference temperature ..54 reset ......57 RS232 interface .

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