Global Water 800-876-1172 • globalw.com Global DO Monitor Software Manual For Use With WQ-FDO Sensor and GL500-7-2 Data Logger Global Water Instrumentation, Inc. 151 Graham Road P.O. Box 9010 College Station, TX 77842-9010 T: 800-876-1172 Int’l: (979) 690-5560, Fax: (979) 690-0440 E-mail : globalw@globalw.
Global Water 800-876-1172 • globalw.com Congratulations on your purchase of a Global Water WQ-FDO Dissolved Oxygen Sensor and GL500 Data Logger. These instruments have been quality tested and approved for providing accurate and reliable measurements. We are confident that you will find the logger to be a valuable asset to your applications. Should you require assistance, our technical staff will be happy to help. Table of Contents I. Overview ▫ ▫ ▫ II. System Requirements ▫ III.
Global Water 800-876-1172 • globalw.com I. Overview The Global DO Monitor software is an enhanced version of the Global Logger II data logger interface; and used to convert dissolved oxygen partial pressure and temperature, along with conductivity and atmospheric pressure, into DO concentration and saturation.
Global Water 800-876-1172 • globalw.com III. Software and Driver Installation: Global DO Monitor Software Installation: This software is for use on Windows based desktop and laptop computers only. Insert the software installation CD and run the Setup program. This will install the Global Logger application in the Program Files folder and automatically put the Global Logger icon on the desktop.
Global Water 800-876-1172 • globalw.com 2) Do not let Windows automatically install the software. Click “Install from a specific location”. Click Next. 3) Specify the location of the driver. Make sure the Global Logger CDROM is in the CD drive and click “Search removable media” only. Click Next. 4) The Hardware Wizard searches for the driver. If Windows advises that the software is not certified, click: “Continue Anyway”.
Global Water 800-876-1172 • globalw.com This only means that Microsoft has not licensed the software. Second party software is allowed and no harm will come to your computer. 5) The first half of the installation is complete. The Hardware Wizard may need to make two passes. Click Finish. 6) Two drivers are sometimes required so the Hardware Wizard may repeat the exact same process again.
Global Water 800-876-1172 • globalw.com 8) To confirm the installation, look in the Device Manager and find the USB Serial Port. The COM setting following that will show the virtual COM port that has been automatically assigned to the driver. As you will see in the following section, this COM port will be automatically detected by the Global Logger software so it is not necessary to note which port is being used by the driver. IV.
Global Water 800-876-1172 • globalw.com There are 3 ways to connect to the GL500 data Logger, direct connection through the RS-232 serial port or USB port and dial out through an installed modem. To make a direct connection to the logger, click the “Direct” option and from the “Port” menu, select the port you wish to use. For USB access select the USB serial port at the COM port the driver was assigned, which is automatically shown in the list.
Global Water 800-876-1172 • globalw.com V. Modem Connection: Access to the GL500 can be made through dial-out to a remote modem by clicking the “Modem” option. The connection from modem to logger requires an RS-232 serial modem, USB modems are not supported as an interface to the logger. Also, some switch settings must be made to the remote modem and an initialization string may be required to properly configure the host modem. Two baud rates are supported 9600 and 19200.
Global Water 800-876-1172 • globalw.com Sample initialization text file: This is for reference and applies to an external US Robotics modem only. ATM1 ; speaker off when connects AT&B1 ; fixed serial port rate AT&D2 ; normal DTR AT&H1&R2 ; h/w flow control AT&I0 ; disable s/w flow control AT&K0 ; disable compression AT&M4 ; normal error control Connect 19200 Select the COM port for your modem and the baud rate. Type in the phone number or select it from the list of prestored numbers.
Global Water 800-876-1172 • globalw.com VI. Main Screen: The main screen is where the status and option menus are accessed. The GL500 data logger will continue to log at normal intervals while connected to the Global Logger software. While connected, the logger will draw an addition current from the power supply of 5-10mA so it is advised that, if you are operating on battery power and plan not to access the logger for extended periods of time, you disconnect from the logger to increase battery life.
Global Water 800-876-1172 • globalw.com Tool Bar: The tool bar at the top of the screen has 3 options; File, Action and Help. In this screen, the File option is used to exit the program only. Action allows a menu driven interface to the various functions and displays the hot-keys, which can be used for faster access.
Global Water 800-876-1172 • globalw.com Records: This field indicates the number of data recordings in memory. Logging State: This shows whether the GL500 is currently logging waiting to be started or stopped by the alarm timers. These features are described in detail later. Sample Continuously: Clicking this check box causes the Global Logger software to take and display a real-time reading once per second until stopped by clicking it again, as well as update the rest of the fields on the screen.
Global Water 800-876-1172 • globalw.com Bar Graphs: The bar graphs show a visual representation of the most recent data reading taken by using the Sample Continuously or Get Sample functions. The upper and lower limits of the display are defined by the user as discussed in detail later. Numerical Reading: The numerical reading at the bottom of the bar graph shows the actual data reading and is updated at the same time as the bar graph.
Global Water 800-876-1172 • globalw.com VII. On-Line Help Files: Clicking on Help displays the on-line help files which give easy access to the information contained in this manual. There are 3 ways to access the information. The first tab is Contents which accesses the table of contents for the manual. Clicking on any of the topics opens up the body of text on that subject. Within each body of text is a discussion of that subject and links to related topics underlined in blue.
Global Water 800-876-1172 • globalw.com VIII. Get History: Clicking the Get History button begins the downloading of the historical data into an information screen. This screen allows the viewing of the recorded data and also provides a path to export the data to an Excel compatible file. Note that the logger continues to log as data is downloaded. Thus, more data points may be downloaded than originally indicated.
Global Water 800-876-1172 • globalw.com Save to File: Clicking this button allows the data to be exported to an Excel compatible .CSV file. Specify the path and the file name and click the Save button Options: This opens a menu which Allows you to select if you want the Time and date in the time stamp to Be in one column or two in the saved .CSV file. Click Close to return. OK: Clicking the OK button returns you to the main screen. IX.
Global Water 800-876-1172 • globalw.com Action: The Action menu has two options, “Program Settings” and “Initialize to Default Values”. Program settings will reprogram the data logger with all the setup and calibration information and works the same as the Program Settings Button at the bottom of the screen. Initialize will restore all of the analog, digital and general setup information fields to default values.
Global Water 800-876-1172 • globalw.com Name: The logger is a user definable name to identify the logger. Up to 32 characters are allowed however, a continuous string of characters of more than 16 with no spaces may not be displayed correctly. Click on the field to enter information. Sensor Warm-up Time: To conserve battery life, the sensors do not normally have power applied to them.
Global Water 800-876-1172 • globalw.com Logarithmic Timing: Typically used in groundwater pump studies, this mode speeds up the sample rate over time. Click the “Logarithmic” option to select this mode. This a logarithmic approximation that steps up the sample rate: a. b. c. d. e. f. g.
Global Water 800-876-1172 • globalw.com once per hour as well as the time that the sample-on-demand was triggered. This feature is used to record the time that special events occurred such as when water sampler was triggered, a door was opened, etc. Alarm Times: Check the box associated with each alarm to enable that feature and enter the desired start or stop time.
Global Water 800-876-1172 • globalw.com The calibration of channel one to the DO partial pressure output sensor is discussed in the following example: Enable: If the “Enable” box at the top of a column is checked, data for that channel will be shown in the historical record and be available for export to a spreadsheet. The data for all of the analog channels is always being recorded whether the channel is enabled or not. A channel can be re-enabled at any time to view recorded data.
Global Water 800-876-1172 • globalw.com Disp Low: This field sets the lower limit of the bar graph displayed in the main screen and provides a way of scaling the graph beyond the lower limit used to calibrate the logger. In this case the lower calibration was zero. Decimal Places: From the pull-down menu, select the number of decimal places to the right of the decimal point that should appear in the historical data and in the numerical data field at the bottom of the bar graph.
Global Water 800-876-1172 • globalw.com Click on the Low EU field and enter the low engineering unit that will be used to calibrate the sensor, not the lowest reading the sensor can output. In the example of pH, enter 4 which is the lowest calibration solution to be used. Click Next. Place the sensor in the condition that will cause it to output the level corresponding to the low EU entered in the previous menu. Wait for the data reading to stabilize. Click Next to complete the calibration. XII.
Global Water 800-876-1172 • globalw.com Enable: Checking the Enable box allows the display of the data for that channel in the historical record. The pulse channels are always being monitored and the counts between sampling intervals stored whether they are enabled or not.
Global Water 800-876-1172 • globalw.com XIII. DO Setup To calculate dissolved oxygen concentration and saturation levels, several environmental factors must be known. In a state if equilibrium; the partial pressure of oxygen in the air and in the water are equal, as stated by Henry’s Law. The partial pressure of oxygen in air is 20.1% of the total atmospheric pressure.
Global Water 800-876-1172 • globalw.com The Dissolved Oxygen Setup Tab shown above is made up of two sections, Inputs and Outputs. The Inputs section tells the software which input channel is used for each sensor, and what the engineering units are. In the case of the optional conductivity and barometric pressure sensors; there is a checkbox for indicating manual entry, and a numerical field for inputting manual conductivity and pressure settings should a sensor not be used.
Global Water 800-876-1172 • globalw.com In the DO Setup tab the input channel number and units are defined; however, this is only for the purpose of telling the software which channel data to use for calculations. It is in the Analog setup tab that the calibration of each sensor is performed, see section XI.
Global Water 800-876-1172 • globalw.com XIV. Programming Program Settings: The Program Settings button at the bottom of the setup menus will cause all the setup and calibration information to be programmed into the data logger. A warning will appear requiring the use to confirm the action. Click Yes to program the logger and No to cancel the operation. Back to Main Window: The Back to Main Menu button exits back to the main screen. If no settings have changed, Exit will occur immediately.
Global Water 800-876-1172 • globalw.com XV.
Global Water 800-876-1172 • globalw.com XVI. Modem Cable Diagrams: Use the following wiring diagrams to make a cable to connect the GL500 Data Logger to an external modem. Pre-wired cables are available from Global Water.
Global Water 800-876-1172 • globalw.com XVII. Maintenance: a. There are no user-serviceable parts inside the Data Logger. b. Global Water recommends checking the battery on a regular basis, the period depending on the number of sensors, sample interval, temperature and the type of battery used. c. Consult the WQ-FDO Sensor manual for information on the dissolved oxygen sensor maintenance. XVIII. Troubleshooting: Issue: Logger is reading incorrectly. a. Verify the power source is supplying enough voltage.
Global Water 800-876-1172 • globalw.com partial pressure of the oxygen in the water. The sensor should read about this pressure. For example, at sea level the average atmospheric pressure is 1013mbar. The partial pressure of oxygen in water exposed to air for a period of time will be about 0.21 x 1013mbar or 212mbar. Because factors like atmospheric pressure and temperature are constantly changing, this is not a recommended way of calibration. This should be done for performance checks only. e.
Global Water 800-876-1172 • globalw.com XIX. Customer Support: Call Global Water for tech support: 800-876-1172 or 979-690-5560 (many problems can be solved over the phone). Fax: 979-690-0440 or E-mail: globalw@globalw.com. When calling for tech support, have the following information ready: 1. 2. 3. 4. 5. Model #. Unit serial number. P.O.# the equipment was purchased on. Our sales number or the invoice number. Repair instructions and/or specific problems relating to the product.
