Operating manual Logger WQL-Cond PC program WQL-Log Logger for conductivity measurement and PC program to display and evaluate data from the logger ba75822de01 03/2011 DRAFT: Thursday, 17.
Note The latest version of the present operating manual can be found on the Internet under www.WTW.com. Copyright © Weilheim 2011, WTW GmbH Reproduction in whole - or even in part - is prohibited without the express written permission of WTW GmbH, Weilheim. Printed in Germany.
WQL-Cond Contents Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 1.1 1.2 Logger WQL-Cond . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101 PC program WQL-Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents 9 WQL-Cond Working with the database and measurement data . . . . . . . . . . . . . . . . . . . . . . . . 159 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 General information on the database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Creating a database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Opening a database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WQL-Cond Overview 1 Overview 1.
Overview Recommended fields of application WQL-Cond Conductivity measurements in wells, bore holes, rivers, water bodies and other surface water, drinking water, ground water, leachate, waste water. 1.2 PC program WQL-Log The WQL-Log PC program serves to operate a connected WTW data logger of the WQL series type. The WQL-Log PC program automatically recognizes the logger when it is connected to the USB interface and controls the menus according to the type and measured parameter.
WQL-Cond Overview PC + WQL-Log Logger Connect Calibrating (chapter 4) Calibrate Measuring (chapter 5) Measure directly Logging (chapter 6) Set up logging job Calibration record Calibrate in standard solution Connect Measure Current values (real time) Connect Carry out logging job Parameterize, send Clear the logger memory Stop communication with WQL-Log Measurement dataset 1 Measurement dataset 2 Measurement dataset 3 ... Measurement dataset 1 Measurement dataset 2 Measurement dataset 3 ...
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WQL-Cond Safety 2 Safety This component operating manual contains special instructions that must be followed during the operation of the logger and PC program. Always keep this operating manual in the vicinity of the logger and PC program. Symbols used Note indicates notes that draw your attention to special features. Note indicates cross-references to other documents, e.g. application reports.
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WQL-Cond Commissioning 3 Commissioning Note z Normally, all screw joints of the logger housing can be opened and closed by hand, without using any tools. If necessary, use a paper towel so you can get a better grip on the parts. z Insert the battery in a clean and preferably dry environment. 3.1 Inserting the battery Note The logger is powered by a 3.6 V lithium battery, size AA, as provided in the scope of the delivery (see chapter 14 TECHNICAL DATA).
Commissioning WQL-Cond 1 Unscrew the cap (Pos. 1 in Fig. 3-1). 2 Unscrew the sleeve (Pos. 2). 3 Insert the battery. When doing so, make sure that the battery is correctly positioned (see label in the battery compartment). 4 Screw the sleeve on the shaft with the shorter thread. At the rear end of the sleeve there is a thin O-ring inside (Pos. 3). Make sure that this O-ring is evenly positioned in the groove and is not twisted. 5 Screw on the sleeve and cap again.
WQL-Cond Commissioning 3.3 Installing the WQL-Log program 3.3.1 PC requirements The WQL-Log software program requires the following system components: Hardware requirements z Computer with Intel or Pentium III 500 MHz processor or higher (1 GHz or quicker recommended.) z At least 192 MB RAM (512 MB recommended) z Hard disk with at least 600 MB available memory z CD-ROM drive z A free USB interface. Only one logger can be connected. If a new logger is registered, the previous one is logged off.
Commissioning Installing the driver Installing the PC program and database server 110 WQL-Cond 1 Insert the enclosed CD-Rom in the corresponding disk drive of the PC. 2 Open the directory, USB_VCP_driver. 3 Execute the file, CP210xVCPInstaller with a double click. 4 Follow the user guidance (click Install). 5 Confirm the installation with OK. A virtual COM Port has been created with the installation. 6 Execute the WQLLog_Vxxxx.exe file with a double click (xxxx = current version number).
WQL-Cond Commissioning Note If the SQL server was already installed for another application, the installation of the server is automatically skipped. The program continues with step 15. 8 Check off the checkbox, I accept the licensing terms and conditions. 9 Click Next. An information window appears with the components required for the installation. 10 ba75822e01 03/2011 Click Install. The installation is carried out.
Commissioning WQL-Cond 11 Select the Mixed Mode option. 12 In the Enter password field, enter the password WTW!2009. 13 Repeat the password entry WTW!2009 in the Confirm password field. Note The password WTW!2009 must be entered twice. If a different password is entered, the PC program is not granted access to the database. Note If the SQL server was already installed for another application, you have to change the password for the SQL server first before the WQL-Log program can create a database.
WQL-Cond ba75822e01 Commissioning 03/2011 15 Here you can change the location where the PC program should be stored (click Change... ). When the required location is displayed, click Next. 16 Here you find information on the installation. Click Install.
Commissioning WQL-Cond 17 114 Click Finish to complete the installation.
WQL-Cond Commissioning 3.4 ba75822e01 03/2011 Initial commissioning 1 Start the WQL-Log program (the relevant icon is on the desktop). The Login window appears. 2 If the WQL-Cond logger is connected to the PC via a USB cable and should communicate with the WQL-Log PC program: Confirm with OK. The WQL-Log program searches for the connection with the logger. 3 Confirm with OK. During the initial commissioning, the Select database window appears.
Commissioning 116 WQL-Cond 4 Confirm the option, Create a new database with OK. The window to save the newly created database appears. 5 Change the name of the database as necessary. Click OK. The database is stored and a message appears: 6 Confirm with OK.
WQL-Cond Commissioning Note If the SQL server was already installed for another application, you have to change the password for the SQL server first before the WQL-Log program can create a database. To change the password see section 13.3 COMMUNICATION BETWEEN PC PROGRAM AND SQL SERVER.
Commissioning WQL-Cond 3.5 Connection types The PC program WQL-Log works with two types of connection: z Work with database (the logger and PC program do not communicate) z Connected to logger (the logger and PC program communicate) Working with the database In this type of connection it is only possible to process the measurement data stored in a database and to change the system settings.
WQL-Cond Commissioning 3.6 Starting the WQL-Log program 1 Start the WQL-Log program. The Login window appears. 2 If necessary, you can change the display language here with the menu item, Display (see section 4.1 SETTING THE LANGUAGE) and find out which software version of the WQL-Log program is installed with the menu item, Help (see section 10.3 PROGRAM INFO). 3 If the WQL-Cond logger is connected to the PC via a USB cable and should communicate with the WQL-Log PC program: Confirm with OK.
Commissioning Working with the database 120 WQL-Cond 5 If you want to work with the database: Select Work with database and confirm with OK. The data window appears with the logger data that was last read in (during the initial commissioning, an empty data window appears). 6 To continue, see chapter 9 WORKING WITH THE DATABASE AND MEASUREMENT DATA.
WQL-Cond Setting the display 4 Setting the display Under the Display menu item you can set the language and temperature for the WQL-Log PC program and the WQL-Cond logger. You can additionally set whether or not a cursor with a value field with time, date and measured value should appear for each measured parameter in the data window. 4.1 1 In the Display menu, select the menu item, Language. 2 The options Deutsch (German) and Englisch (English) appear.
Setting the display WQL-Cond 4.3 Setting the cursor Note The Diagram menu item appears only if data are available in the database. 122 1 In the Display menu, select the menu item, Diagram. 2 The options, Show cursor and Hide cursor appear. 3 Select the required option with a mouse click. After clicking on Accept the setting is immediately active. The data window appears with the cursor and value field. You can change the position of the cursor by moving the data window with the mouse.
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Setting the measuring mode 5 WQL-Cond Setting the measuring mode You can make the following settings in the Device / Set menu (default setting in bold): Measuring mode z Conductivity [μS/cm] / [mS/cm] z Salinity Sal [ ] z TDS [mg/l] / [g/l] with adjustable TDS factor in the range 0.40 ... 1.
WQL-Cond Setting the measuring mode Application tips ba75822e01 03/2011 Select the temperature compensations given in the table according to the respective test sample: Test sample Temperature compensation Display Natural water (ground water, surface water, drinking water, waste water) nLF according to EN 27 888 nLF Other aqueous solutions Set linear temperature coefficient 0.000 ... 3.
Setting the measuring mode WQL-Cond 4 126 Confirm with OK.
WQL-Cond Calibration in control standard (determining the cell constant) 6 Why determine the cell constant? Calibration in control standard (determining the cell constant) Aging slightly changes the cell constant, e. g. due to coatings. As a result, an inexact measured value is displayed. The original characteristics of the cell can often be restored by cleaning the cell. Calibration determines the current value of the cell constant and stores this value in the logger.
Calibration in control standard (determining the cell constant) 6.1 Calibration procedures WQL-Cond Calibration settings Two calibration procedures can be selected: z Manual (with a control standard of your choice) z Automatic (with 0.01 mol/l KCl control standard) Selecting the calibration procedure 1 In the Device menu, click the menu item, Calibrate. 2 The calibration window appears. Here you can select the Manual or Automatic calibration procedure.
WQL-Cond Calibration in control standard (determining the cell constant) 6.2 Calibrating (automatic) Note We recommend to always calibrate with the protective hood screwed on so the measuring cell is protected. Use a stand as necessary. Preparatory activities Calibration ba75822e01 03/2011 1 Connect the WQL-Cond logger to a USB port of your PC with the USB cable. 2 Have the 0.01 mol/l KCl control standard ready. 3 In the Device menu, click the menu item, Calibrate.
Calibration in control standard (determining the cell constant) 6 WQL-Cond The note, AutoRead is running... appears. As soon as a stable value is recognized, the calibration record appears. Note You can prematurely terminate the AutoRead function manually with Accept at any time. If the AutoRead function is prematurely terminated, the current measurement data are accepted immediately.
WQL-Cond Calibration in control standard (determining the cell constant) 7 Accept the calibration with Accept. The message Calibration successful appears and the new calibration will now be used for measurement. If you press Cancel, the logger discards the new calibration and will continue to use the previous calibration values. Note The calibration history with the data of the last 20 calibration procedures can be displayed at any time (see section 6.4 VIEWING THE CALIBRATION HISTORY).
Calibration in control standard (determining the cell constant) 6.3 WQL-Cond Calibrating (manual) Note We recommend to always calibrate with the protective hood screwed on so the measuring cell is protected. Use a stand as necessary. Note For manual calibration with a control standard, the temperature dependent conductivity values of the standard are required. Normally a table with these values is enclosed with the control standard.
WQL-Cond Calibration in control standard (determining the cell constant) 5 Use the Continue button to start the measurement. 6 The note, AutoRead is running... appears. As soon as the value is stable, the prompt to enter the temperature dependent conductivity value appears. Note You can prematurely terminate the AutoRead function manually with Accept at any time. If the AutoRead function is prematurely terminated, the current measurement data are accepted immediately.
Calibration in control standard (determining the cell constant) WQL-Cond 7 Enter the conductivity value for the displayed temperature. 8 Click Continue. As soon as a stable value is recognized, the calibration record appears. 9 Accept the calibration with Accept. The message Calibration successful appears and the new calibration will now be used for measurement. If you press Cancel, the logger discards the new calibration and will continue to use the previous calibration values.
WQL-Cond Calibration in control standard (determining the cell constant) Note The calibration history with the data of the last 20 calibration procedures can be displayed at any time (see section 6.4 VIEWING THE CALIBRATION HISTORY). Calibration evaluation After calibration, the system automatically evaluates the current status of the calibration. The evaluation appears also in the calibration record. Calibration record Cell constant [cm-1] +++ Within the range 0.450 ... 0.
Calibration in control standard (determining the cell constant) 6.4 WQL-Cond Viewing the calibration history The last 20 calibration records are stored in the logger and can be recalled. Proceed as follows: 136 1 In the Device menu, select the Set menu item, and select the measuring mode for which the calibration history should be displayed. 2 In the Device menu, click the menu item, Calibrate. 3 The calibration window appears. 4 Click the menu item, Calibration history.
WQL-Cond Calibration in control standard (determining the cell constant) 6 Return to the calibration window with Cancel. Note Each calibration is given an individual calibration ID, which is stored with the logged measured values together with the calibration date and time (see section 9.8 EXPORTING DATA).
Calibration in control standard (determining the cell constant) 6.5 WQL-Cond Exporting the calibration history The last 20 calibration records are stored in the logger as the calibration history and can be exported as a csv file. Proceed as follows: 138 1 In the calibration history window, select the Export menu item. 2 Select the option, Export as *.csv file. The window to save the calibration history appears. 3 Change the location and name of the file as necessary.
WQL-Cond Measuring directly 7 Measuring directly The WQL-Log PC program in conjunction with the WQL-Cond logger can measure and display the value of a solution directly according to the set parameter. The directly measured values are not stored in the logger. Proceed as follows when you want to measure directly: ba75822e01 03/2011 1 Connect the WQL-Cond logger to the PC with the USB cable. 2 In the Device/Login menu, connect the logger to the WQL-Log PC program.
Logging WQL-Cond 8 Logging Listed below are the typical operating steps with which to set up and carry out a logging job. The chapters where the operating steps are described in detail are also mentioned. 8.1 1 2 Typical sequence of a logging job (checklist) Connect the logger to the PC with the USB cable. Start the WQL-Log program (see section 3.6 STARTING THE WQL-LOG PROGRAM). 140 3 Register the logger (see section 3.6 STARTING THE WQL-LOG PROGRAM ).
WQL-Cond Logging 8.2 Setting up a logging job - setting parameters You can set the following parameters for a logging job (i.e.
Logging WQL-Cond Tab Setting Setting options (default setting in bold) Time Automatic time adjustment z Yes (date/time for the logger is automatically synchronized with that of the PC) z No (Enter the date/time for the logger) Parameter Mode z Conductivity [μS/cm] / [mS/cm] z Salinity Sal [ ] z TDS [mg/l] / [g/l] with adjustable TDS factor in the range 0.40 ... 1.
WQL-Cond Logging Application tips ba75822e01 03/2011 Select the temperature compensations given in the table according to the respective test sample: Test sample Temperature compensation Display Natural water (ground water, surface water, drinking water) nLF according to EN 27 888 nLF Other aqueous solutions Set linear temperature coefficient 0.000 ... 3.
Logging WQL-Cond 8.3 Setting the parameters and starting the logging job To change one or several of the above listed settings proceed as follows: 144 1 Connect the WQL-Cond logger to the PC with the USB cable. 2 Start the WQL-Log program. The Login window appears. 3 Confirm with OK. The WQL-Log program searches for the connection with the logger. 4 Confirm with OK. 5 If the logger contains new data: A window with the current logging jobs appears.
WQL-Cond ba75822e01 Logging 03/2011 6 If a logging job is still running, click Stop. 7 To go to the data window without reading in any data, click Exit the list. If you wish to import the data, click Import. The read-in process can take some time (depending on the number of datasets to be read in).
Logging WQL-Cond Note Do not unplug the cable connecting the logger to the PC during the read-in process. If the connection is cut, the read-in process is terminated and has to be repeated from scratch. Note Only click Delete all logging jobs if you want to discard all data stored in the logger. This action will delete all jobs in the logger memory, and the data will be irretrievably lost! The jobs that were already imported and stored in the database are retained.
WQL-Cond ba75822e01 Logging 03/2011 10 In the Device menu, select the menu item, Set up logging job. A note on calibration appears. 11 Confirm with OK. The Logging tab appears, the first tab of the window, Set up logging job. 12 Based on the displayed percentages check whether the storage capacity and battery charge are sufficient for the intended logging job.
Logging 148 WQL-Cond 13 Interval: To set the logging interval, click the arrow on the right side of the setting field. A drop-down menu appears with the possible intervals. Select the required interval with a mouse click. If User-defined was selected, click the arrows on the right side of the selection fields and set the hours, minutes and seconds for the interval. 14 Start: To set the start of the logging, click the arrow on the right side of the setting field.
WQL-Cond Logging 19 Click the Parameter tab. 20 Make the settings for the measuring mode and temperature compensation and if necessary, for the reference temperature and temperature compensation as well. 21 Save the settings for the logging job (configuration) as required (see section 8.4 LOGGING JOB - STORING OR LOADING THE CONFIGURATION). Note In the Logging tab, the memory capacity required with the selected settings is displayed at the bottom (number x of 600,000 possible datasets).
Logging Starting the logging job WQL-Cond 22 To start the logging job, click the button, Send logging job. The message, The settings have been successfully transferred appears. 23 Confirm with OK. A window pops up with an overview of the logging job just sent. 24 Confirm with OK.
WQL-Cond Logging 8.4 Logging job - storing or loading the configuration You can store to a file the settings for a logging job and call them up later for another logging job. To do so, proceed as follows: Storing the configuration ba75822e01 03/2011 1 In the File menu, select the submenu, Set up logging job. 2 After making the settings, click File in the Set up logging job window. 3 To save the configuration of a logging job, click Save configuration.
Logging WQL-Cond Notes z The program suggests a storage location and name for the file: the name of the logger and the storing date and time (e.g. Logger WQLCond_Config_20110124_1619). z The file has the file extension, ".xml". z The suggested location and name can be changed. Loading the configuration 152 4 Confirm with the Save button. 5 A message appears, confirming that the file with the configuration was stored. 6 Confirm with OK.
WQL-Cond Logging 8.5 Signal LED and logger key button 8.5.1 Signal LED to indicate the operating conditions of the logger Next to the key button on the control panel of the logger there is a signal LED. When the logger is not connected to the WQL-Log PC program, this red LED indicates the different operating conditions of the logger as follows: Mode of flashing Operating condition On for 2 seconds, then off z The logging job is completed. z The power supply of the logger was interrupted.
Logging WQL-Cond 8.6 Importing data Depending on the logging job, the WQL-Cond logger measures for a certain period of time and at certain intervals the conductivity and temperature of a solution. The data is stored in the logger. The WQL-Log PC program has to import and store to a database the data before the data can be displayed and processed. Note If the logger contains data, the list with the query for the use of the data appears automatically when the logger is connected to the PC program.
WQL-Cond Logging 8.7 Overview of the data window The measurement datasets imported from the logger are stored in a database and graphically displayed in a data window.
Logging WQL-Cond 8.8 Managing the logging jobs The WQL-Cond logger can store up to 20 logging jobs with the respective calibration data and setting data. You can view an overview of the logging jobs stored in the logger, read them in individually, display each logging job as a graphic or clear the logger memory. Possible status displays of a logging job Status display Explanation Options Running.... The logger is logging. Stop logging job or Cancel Waiting...
WQL-Cond Logging 3 ba75822e01 03/2011 To stop the running job, click Stop logging job. The list of logging jobs is displayed. With Cancel the logging job goes on running and the logger is logged off.
Logging Showing a logging job as a diagram Clearing the logger memory WQL-Cond 4 Select a logging job with the arrow keys or with the mouse. 5 If the status is Finished, import the data of the highlighted logging job to the database with Import (the diagram view is only available after the data have been imported). 6 To show the data of the highlighted and imported logging job as a graphic, click Diagram view.
WQL-Cond Working with the database and measurement data 9 Working with the database and measurement data 9.1 General information on the database The WQL-Cond logger can generate large amounts of measurement data, which can subsequently be stored, managed and used for evaluation with the WQL-Log program. The WQL-Log program uses the Microsoft SQL Server 2005 Express database for this.
Working with the database and measurement data 9.2 WQL-Cond Creating a database If no database is available on initial commissioning, its creation is enforced, i.e. a database must first be created prior to storing data in it. If a database already exists, newly generated data can be stored in it or you can create a new database and store the data there. Proceed as follows: 160 1 In the File menu, select the submenu, Create new database. 2 Confirm with OK.
WQL-Cond Working with the database and measurement data 9.3 Opening a database When being started, the WQL-Log program automatically opens the database last used. If there are several databases, you can select another database to be opened. Proceed as follows: ba75822e01 03/2011 1 In the File menu, select the submenu, Open database. A window to select the database pops up. 2 Click the arrow next to the Database name field and select the required database. 3 Confirm with OK.
Working with the database and measurement data 9.4 WQL-Cond Backing up a database You can create a backup copy of an open database at any time. Proceed as follows: 1 In the File menu, select the submenu, Back up database. Notes z The program suggests a storage location and name for the backup copy: the name of the original database with the addition "backup" and the date and time the backup copy is created. z The backup copy has the file extension, ".bak".
WQL-Cond Working with the database and measurement data 9.5 Restoring a database You can restore a database from a backup copy (see section 9.4 BACKING UP A DATABASE) at any time by opening the backup copy from a connected database. This can either be an existing database you want to restore to a previous state or a newly created, empty database into which you want to store the saved data in case the original database was destroyed or inadvertently erased.
Working with the database and measurement data 164 5 Confirm with the Open button. A security prompt appears: 6 Click the option Yes and confirm with OK. A message appears: 7 Confirm with OK. The database has been restored.
WQL-Cond Working with the database and measurement data 9.6 Erasing a database You can erase any connected database of the WQL-Log program. Proceed as follows: ba75822e01 03/2011 1 Make sure that the database you want to erase is connected (= open), or open the database with the menu, File / Open database. 2 Open the menu, File / Delete database. A security prompt appears: 3 Click the option Yes and confirm with OK. The database is erased.
Working with the database and measurement data 9.7 WQL-Cond Querying data The data recorded by the logger and stored in the database can be displayed as a graphic via the Query menu item. Proceed as follows: Querying current data 166 1 In the Query menu, click the menu item, New. The New query window appears. 2 The Standard tab appears when a logger is connected. 3 To graphically display the data last imported from the connected logger, click Apply.
WQL-Cond Working with the database and measurement data Note You can change the position of the cursor by moving the data window with the mouse. Note The series number of the connected logger is displayed in the bottom left corner of the data window (see section 8.7 OVERVIEW OF THE DATA WINDOW).
Working with the database and measurement data Querying userdefined data 168 WQL-Cond 1 Click the User-defined tab in the New query window. The Userdefined tab appears immediately in the Query menu if no logger is connected. 2 If you only want to query datasets with a certain measured value ID, check off the box for Measured value ID and then click the arrow next to the selection field for the Measured value ID. Select the required measured value ID.
WQL-Cond Working with the database and measurement data 6 The queried data appear as a graphic. Note Always make the settings for the user-defined query from the top down, as the data are filtered in this sequence. Note If you do several queries, even from several databases, an additional window with a graphic appears for each query. You can cascade these windows with the Restore down ( ) button. You can also arrange the windows side by side in order to compare several graphics.
Working with the database and measurement data 9.8 WQL-Cond Exporting data The data displayed as a graphic with the aid of the Query menu can be exported to a *.csv file. The WQL-Log program creates three csv files with each export procedure: One with the measurement data, one with the calibration data and a third one with the setting data. In this form the data can be read and processed with Microsoft Excel and many other spreadsheets.
WQL-Cond Working with the database and measurement data Notes The WQL-Log program creates three csv files with each export procedure: z A csv file with the measurement data and information on the logger and logging job (suggested name with date and time) z A csv file with the relevant setting data (suggested name with date and time and the addition, "Set") z A csv file with the relevant calibration data (suggested name with date and time and the addition, "Cal") z If the number of datasets to be exported
Working with the database and measurement data WQL-Cond Example: Exported measurement data opened with MS Excel The csv file with the measurement data includes the following information: z Sensor name z Series number of the logger (SerNo) z Start and stop (time) of the exported data z Date and time of the measured values z Measured value z Measured value status (Valid; Invalid; OFL/UFL = outside the measuring range; Ranging = optimal measuring range is being searched) z Temperature z Measured value statu
WQL-Cond Working with the database and measurement data Example: Exported calibration data opened with MS Excel The csv file with the calibration data includes the following information: z Sensor name z Series number of the logger (SerNo) z Calibration ID, so you can allocate the calibration data if there are several calibration procedures for the exported data z Date and time of the calibration z Calibration mode (Mode) z Calibration temperature (Temp) z Cell constant (CellConst) z Calibration evaluatio
Info menus WQL-Cond 10 Info menus 10.1 Database information The data read in from the logger are saved in a database. You can query the name, version and type of the opened database. To do so, proceed as follows: Database information 1 In the File menu, click the menu item, Database info. The Database info window appears. 2 Confirm with OK. The Database info window disappears. Note The size of a database file can be 4 GB max.
WQL-Cond Info menus 10.2 Device information If a logger is connected to the PC, you can query the device name, series number and firmware version of the connected logger via the Device/Info menu item. To do so, proceed as follows: Device information ba75822e01 03/2011 1 In the Device menu, click the menu item, Info. The Device info window appears. 2 Confirm with OK. The Device info window disappears.
Info menus WQL-Cond 10.3 Program info In the Help/About WQL-Log menu you can look up which version of the WQLLog PC program was installed. To do so, proceed as follows: 1 In the Help menu, click the About WQL-Log menu item. The About WQL-Log window appears. 2 Confirm with OK. The About WQL-Log window disappears.
WQL-Cond Resetting the logger 11 Resetting the logger You can reset to the default condition the logger and the PC program with its settings. In the default condition, the settings are as follows: Configuration parameters Setting Logging interval 1 second Start of the logging Logger key button End of the logging Time period 1 hour Measured value ID default Measuring mode Conductivity Temperature compensation nLF Temperature coefficient 2.
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WQL-Cond Maintenance, cleaning, storage General information 12 Maintenance, cleaning, storage 12.1 General maintenance instructions z Normally, all screw joints of the logger housing can be opened and closed by hand, without using any tools. If necessary, use a paper towel so you can get a better grip on the parts. z In the screwed condition, no gaps may be visible at the joints. z Prior to unscrewing any screw joints, clean the exterior of the logger (see section 12.
Maintenance, cleaning, storage WQL-Cond 12.3 Battery 12.3.1 Battery service life The logger has an energy saving feature. The service life of the battery depends very much on the usage of the logger, especially on the measuring interval. The service life to be expected of a full battery (2600 mAh) can be estimated by means of the following table: Measuring interval Service time to be expected 1 ... 4 sec 1 months 5 ... 9 sec 1.5 months 10 .... 29 sec 2 months 30 ... 59 sec 5 months 1 min ...
WQL-Cond Maintenance, cleaning, storage Note The battery status is also displayed while you are setting up a logging job (see section 8.3 SETTING THE PARAMETERS AND STARTING THE LOGGING JOB). 12.3.3 Resetting the battery counter For the battery status to be displayed correctly, the battery counter must be reset on installing a new battery. Proceed as follows: Resetting the battery counter ba75822e01 03/2011 1 In the Device menu, select the menu item, Battery manager.
Maintenance, cleaning, storage WQL-Cond 12.3.4 Battery replacement Note Always install a brand-new battery (see section 12.5 REPLACEMENT PARTS) so the battery manager can work correctly. When replacing the battery the general maintenance instructions in section 12.1 must also be followed. The battery is replaced in the same way as it is inserted during the commissioning (see section 3.1 INSERTING THE BATTERY). Data preservation After the battery was removed all stored measured values are retained.
WQL-Cond Maintenance, cleaning, storage 12.4 Storage Store the logger in a dry place, observing the storing conditions according to section 14.2 APPLICATION CHARACTERISTICS. Low temperatures usually delay the aging of the measuring cell. Leave the battery installed for storage. 12.5 Replacement parts Description Model Order no. 3.6 V Li battery WQL-RB 109 825 Note If the O-rings or shackle have to be replaced, please contact the WTW service department.
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WQL-Cond What to do if... Unstable measured values Implausible measured values Incorrect temperature display 13 What to do if... 13.1 Calibration and measuring Cause – No stable measured value – Provide stable measuring conditions (e.g.
What to do if... WQL-Cond 13.2 Import of measured values is aborted Communication of the logger and PC program Cause Remedy – Communication problem – Repeat the import process – Use a shorter USB cable – USB-Hub or USB connection at the PC faulty or defective Data logging of the logger aborted Cause – Use other USB connection or PC Remedy – Power supply interrupted – Connect the logger to the PC program and set up logging job. – Make sure that the logger is supplied with power (battery) 13.
WQL-Cond Technical data General features of the measuring cell Measuring ranges, resolution (AutoRange function: the logger automatically selects the suitable measuring range) Accuracy of the measuring technique in the range of application ba75822e01 03/2011 14 Technical data 14.1 Measurement characteristics Measuring principle Four-electrodes measurement Range of application 1 µS/cm ... 1 S/cm Cell constant 0.475 cm-1 ±1.
Technical data Logger function WQL-Cond Measuring interval adjustable: user-defined (1 s ... 24 h) 1 / 5 / 10 / 30 s 1 / 5 / 10 / 15 / 30 min 1 / 2 / 3 / 6 / 9 / 12 / 24 h Capacity of the data memory 600.000 measurement datasets 14.2 Measuring medium Pressure resistance Application characteristics Allowed temperature range 0 ... 60 °C (32 ... 140 °F) Allowed pH range 2 ...
WQL-Cond Technical data Material Metal parts coming into contact with the sample: – Shaft – Sleeve – Coupling ring – Protective hood – Cap Stainless steel 1.
Technical data 190 WQL-Cond ba75822e01 03/2011
WQL-Cond Lists Index A Battery manager . . . . . . . . . . . . . .180, 181 Measuring mode . . . . . . . . . . . . . 142 Start . . . . . . . . . . . . . . . . . . . . . 141 Stop . . . . . . . . . . . . . . . . . . . . . 141 Start . . . . . . . . . . . . . . . . . . . . . . . . 144 Logging job setting routine . . . . . . . . . . . 147 Logging jobs Erase . . . . . . . . . . . . . . . . . . . . . . . 158 Viewing . . . . . . . . . . . . . . . . . . . . . . 156 C M Application tips . . . . . . . . . . . .
Lists 192 WQL-Cond ba75822e01 03/2011
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