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Global Water 

 (800)876-1172 

 www.globalw.com 

 

If performing a lab calibration, insert the sensor into the appropriate calibration meter and set to full scale 
range of the sensor.  If performing an environmental calibration, insert sensor into its targeted environment 
at conditions of at least 10% of full scale range.  For example a 120’ water level sensor should be calibrated 
at a water depth of at least 12’.  Calibrating at greater percentages (up to 100%) provides greater accuracy. 

Enter the maximum unit range of the 
sensor (

120

 for a 120’ level sensor in 

this example) in the 

highest value

 text 

field and click the 

Next

 button. 

Change the 

Sensor Type or EU

 (engineering units) field to the unit type you are calibrating to (i.e. meters, 

feet, etc.) by clicking in the field and typing the unit name.  Note that the 

Sensor Type or EU

 field is only a 

text label.  Actual readings are determined by the following calibration steps. 

In case you make a mistake during the calibration process, write down the existing values in the 

High Raw

 

and 

Low Raw

 fields before continuing (in this case 

64435

 and 

12704

).  Click the 

Calibrate

 button. 

Analog Channel Calibration 

Using Global Logger Software 

Summary of Contents for GL400

Page 1: ...Page 1 Global Water 800 876 1172 www globalw com 1 05 2005 Copyright Global Water Instrumentation Inc 2002 GL400 Datalogger User s Guide...

Page 2: ...is product manual please be aware of the following terminology and formatting standards Bolded terms i e bold indicate either a keyboard key a word or icon that appears on your com puter monitor scree...

Page 3: ...irst and last items in the string separated by For example the phrase Click on File New Folder means click on File select New and click on Folder When the documentation directs you to exit a program o...

Page 4: ...inuously Real Time Values 20 Get Settings 20 Get History Data 21 Clear Memory 23 Synchronize Time 23 Setup 23 Datalogger Name and Sensor Warmup Time 24 Analog Channel Calibration 25 Pulse Channel Cali...

Page 5: ...ain Gauges Contact us for unique special and custom modifications to meet the requirements of your application The GL400 Datalogger is designed to accept any 4 20 mA sensors Twisted pair 2 wire and 3...

Page 6: ...checklist to ensure that you have received everything needed to operate the GL400 Note there are two different varieties of dataloggers the GL400 7 1 and GL400 1 1 Use the checklist appropriate to you...

Page 7: ...for GL400 1 1 GL400 1 1 2 Channel Datalogger User Manual Communication Cable RS232C COM Cable Global Logger Software 3 1 2 Floppy Diskette Communication Cable Global Logger Software User Manual Datalo...

Page 8: ...he GL400 The COM port can connect to a PC se rial port using the included Communica tion Cable COM port Access the included 12V 2 AH lead acid gell cell directly from inside enclosure Chapter 1 The GL...

Page 9: ...fe male connector to your PC and the other to your Datalogger GL400 7 1 GL400 1 1 Introduction Connect sensors to the GL400 by threading sensor cables through the enclosure s strain reliefs 8 on the G...

Page 10: ...ify your system time in Windows click Start Set tings Control Panel from the task bar Double click the Date Time icon Before you install the software check the accuracy of the time and date on your co...

Page 11: ...n Exit the control panel Double click the My Computer icon on your desktop Double click the floppy icon normally listed as 3 floppy A Insert the 3 1 2 floppy diskette labeled Global Logger Software Ve...

Page 12: ...Page 12 Global Water 800 876 1172 www globalw com Click on the file Global Logger exe Click Edit Copy from the menu bar Chapter 2...

Page 13: ...To save to the directory Global Logger located on your main C hard drive although C is normally the main system drive the designation can vary from system to system start by clicking the down carrot...

Page 14: ...obal Water 800 876 1172 www globalw com Double click on the new Global Logger directory Click Edit Paste from the menu bar A Copying dialog box should now display Wait for the copy process to complete...

Page 15: ...ver if the datalogger is submerged in water it will corrode the electronics and cause it to stop working properly Please ensure that the datalogger will be clear from flooding and out of direct rain f...

Page 16: ...source to the Ext terminals located be low the internal battery Batt terminals battery terminals analog channels 1 7 pulse channel Chapter 2 To connect a sensor thread sensor cable through an enclosu...

Page 17: ...nnected to the logger and is accessible through the Global Logger software pack age See Global Logger Startup page 18 Copyright Global Water Instrumentation Inc 2001 For pulse sensors polarity is not...

Page 18: ...hich your Global Logger exe file is located and double click on the file If you have not installed the Global Logger software or if you want to create a desktop icon see Global Logger Software Install...

Page 19: ...aphs indicate zero to full scale range of sensor for the eight analog channels of the datalogger For example the channel 4 graph in the following screen shot displays a 120 foot sensor with a reading...

Page 20: ...Copyright Global Water Instrumentation Inc 2001 Global Logger Functions Sample Continuously Real Time Values To display real time values each second select the Sample Continuously checkbox Readings wi...

Page 21: ...ta point for every channel by Date Time and reading value Channel 1 readings are displayed in the column immediately to the right of the Date Time column and additional channels consecutively to the r...

Page 22: ...eld and type the desired name However do not change the csv extension This extension ensures the file will be recognized as a comma sepa rated value CSV file You can open CSV files in spreadsheet prog...

Page 23: ...ynchronize your GL400 s internal clock to your computer s clock click the Synchronize Time but A Standby graphic will display in the middle of your monitor screen while synchronizing Setup Note that y...

Page 24: ...ors before the datalogger takes a reading For example you set Global Logger to a sensor warm up time of 3 seconds and to record readings every 20 minutes at fixed intervals If the process begins at 12...

Page 25: ...r the maximum unit range of the sensor 120 for a 120 level sensor in this example in the highest value text field and click the Next button Change the Sensor Type or EU engineering units field to the...

Page 26: ...and lab calibrations wait at least five seconds for the sensor to adjust to 0 sensing levels Click the Finish button See Appendix B Worksheets pages 36 Note that if performing an envi ronmental calibr...

Page 27: ...lse reading tap the Value for Single Pulse field and enter the de sired predetermined value To set the number of decimal place values to display tap the Decimal Places field and enter the number of de...

Page 28: ...rrows Set the recording interval time unit by clicking the down carrot of the time unit field not labeled and clicking Seconds Minutes Hours or Days Chapter 3 Note that if you choose to record at fixe...

Page 29: ...t the bottom of the Global Logger Setup menu The bar should change to reflect the latest exception setting The setting in these screenshot examples sets the logger to record a single reading after rea...

Page 30: ...om Chapter 3 After calibrating and or changing interval recording settings click the OK button To cancel changes click Cancel You may also manually change GL400 settings directly using a terminal prog...

Page 31: ...ger will not work reliably if the battery voltage is below 10V If the battery is allowed to drain below 9V it may not charge back to 12V when the charger is applied The battery can be recharged using...

Page 32: ...orm the following steps Verify that the communication cable is securely connected to the data logger and to your computer Check the battery voltage on the logger Make sure that your computer is correc...

Page 33: ...Email globalw globalw com When calling for tech support please have the following information ready 1 Model number 2 Unit serial number 3 P O number the equipment was purchased on 4 Our sales number...

Page 34: ...urs or 1 to 256 days Time Accuracy 0 0015 Time Format Month Day Year Hour Minute Second Communication Speed 38 400 kbs Data Transfer 2MB 4 min Type RS232C Serial Electrical Battery 12V Sealed Recharge...

Page 35: ...GL400 Detailed Specifications Physical Properties Severe Environment Enclosure Loaded Length 254mm 10 Width 191mm 7 5 Height 114mm 4 5 Weight 2 268 kg 5lbs Vent Port Open or Closed Lockable Entry Port...

Page 36: ...new limits on the bar graph First take the two coordinates that were found during calibration High EU __________ High Raw __________ and Low EU __________ Low Raw __________ Now calculate the slope u...

Page 37: ...are not exact You may need to measure for precise distances Total Depth _____________ Next find the maximum Sensor Depth range of the sensor In the Calibration section of the software you can find thi...

Page 38: ...nd Description D Set Date T Set Time Get number of data points h Get first historical data point a Get historical data point again X Abort i Get next historical data point increment E Erase r Get real...

Page 39: ...Recharging the Battery Disconnect the datalogger s red and blue spade lugs from the battery Ensure that the battery charger is not plugged in Disconnect spade lugs from battery Connect the charger s...

Page 40: ...g the charger and check the battery voltage using a multimeter If the battery voltage has increased but not reached 12V it may need to be left on the charger longer If the battery voltage has not chan...

Page 41: ...e protected this allows the battery to remain charged while the external source has power CAUTION The enclosure must be vented or gasses could build up inside the case causing a rupture Alternatively...

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