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Global Water 

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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.

 

10 times per second for 20 seconds, 200 samples 

b.

 

1 second interval for 100 seconds, 100 samples 

c.

 

10 second interval for 10 minutes, 60 samples 

d.

 

1 minute interval for 60 minutes, 60 samples 

e.

 

10 minute interval for 10 hours, 60 samples 

f.

 

1 hour interval for 48 hours, 48 samples 

g.

 

1 day interval until memory s full 

 
 
 

Log Upon Deviation:

  Clicking the “Log only if Channel 1 change e/-“ box 

causes the logger to record the current reading in memory only if it exceeds the 
previously reading by the preset amount entered in the numeric field.  This logging 
exception applies to channel 1 only and the deviation is measured in Raw Data units 

where the approximate raw data range is from 0-65535, corresponding to 0-20mA.   
 
To find the actual number of raw data units per engineering unit, use the calibration 
numbers in the Analog Setup screen for channel 1 as follows:  Raw Data Units per 

Engineering Unit = (High Raw – Low Raw) / (High EU – Low EU).  For example:  
Assume a 15 foot water level sensor has a High EU of 15, a Low EU of zero, a High 
Raw of 62256 and a Low Raw of 13104.  (62256-13104) / (15-0) = 3277 units/foot.  
Thus, if you want to log only when a reading exceeds the previous on by 0.5 feet, set 

the deviation to about 1638.  Click the numeric field to enter the desired range. 
 

Wrap records: 

 If the “Wrap records  

at End of Storage” box is checked,  

once the memory is full, the oldest data points will be replaced with the newest.  
Thus, the memory block represents only the newest.  If this feature is not checked, 
the logger will halt recording once the memory is full. 
 

Sample-On-Demand:

  When this box is checked, applying a pulse to the Sample-

On-Demand input will cause the logger to take a data reading and store it in 
memory.  This feature works in all sampling modes and will not interrupt normal data 
recording.  If the sample interval is one hour, the historical record will show data 

Summary of Contents for GL500-7-2

Page 1: ...ter 800 876 1172 globalw com 1 GL500 7 2 Data Logger Global Water Instrumentation Inc 11390 Amalgam Way Gold River CA 95670 T 800 876 1172 Int l 916 638 3429 F 916 638 3270 globalw globalw com 11 30 0...

Page 2: ...l be happy to help Table of Contents I Checklist 3 II Inspection 3 III Warranty 3 IV GL500 Specification 4 V System Requirements 5 VI Software Installation 5 VII Direct Connection 8 VIII Modem Connect...

Page 3: ...ects in material and workmanship under normal use and service for a period of one year from date of shipment from factory Global Water s obligations under this warranty are limited to at Global Water...

Page 4: ...tal Inputs 2 Independent pulse counters Maximum Input Voltage 24VDC Maximum Frequency 100Hz Minimum Pulse Width 2mS Maximum Count 65 535 16 Bit Sample Now Input Sample on Demand input software enabled...

Page 5: ...r application program If you plan to use the USB port you must install the driver You may consider installing the driver now even if you plan to use the serial port USB Driver Installation With the in...

Page 6: ...are Click No not at this time when asked if Windows Update can search for software Click Next 2 Do not let Windows automatically install the software Click Install from a specific location Click Next...

Page 7: ...me 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...

Page 8: ...on Important This data logger supports an Auto Baud Rate Mode which automatically detects the communication speed However this communication software also supports loggers which may be programmed in a...

Page 9: ...ned to COM1 the port can still be used for accessing the logger but the external device must be disconnected Both the serial and USB ports can be connected to the logger at the same time but you must...

Page 10: ...culty establishing a reliable connection at 19200 use the slower connection speed Note that due to the slower baud rates and the additional handshaking performed during modem communication The Global...

Page 11: ...nd operate exactly as if a direct connection was made All options and features work the same but at a reduced communication speed When connecting the GL500 Data Logger to an external modem a special c...

Page 12: ...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 to increase battery life Interface...

Page 13: ...urrent connection status Logger Name The logger name is a user defined name associated with a particular logger to identify one from another It is programmed in the Setup menu as described later and i...

Page 14: ...r software to take and display a single reading as well as update the rest of the fields on the screen This data reading is not stored in the historical record and does not affect the normal recording...

Page 15: ...inuously mode the display will be updated once per second and as pulses are applied to the pulse inputs the Pulse Channel fields will update the count At the end of the normal one minute sampling inte...

Page 16: ...cussion of that subject and links to related topics underlined in blue Clicking on the link will bring up a new window with specific information on that topic In this case Sensor Warm up time in the G...

Page 17: ...ginally indicated At the top of the screen is shown the name assigned to the logger and the number of recordings that have been retrieved At the bottom of the screen are three buttons Pack Save to Fil...

Page 18: ...og Digital and General The first screen to appear is General Setup At the top of the setup screen is a toolbar with three options File Action and Help File The File option allows you to exit the setup...

Page 19: ...will restore all of the analog digital and general setup information fields to default values Only the setup menus are changed the data logger must still be programmed with the new default values A wa...

Page 20: ...Rate Leave this set to Auto Baud Rate Only change this to a fixed baud rate if planning to use this logger in a telemetry application such as using Global Water s Global Access radio modem software O...

Page 21: ...esponding to 0 20mA To find the actual number of raw data units per engineering unit use the calibration numbers in the Analog Setup screen for channel 1 as follows Raw Data Units per Engineering Unit...

Page 22: ...he logger with the timers disabled will return the logger to a normal logging state Use care when programming the alarm times If left enabled changing and reprogramming any of the setup parameters wil...

Page 23: ...een Click on the field to enter the unit or select from a predefined list High EU The High EU field is the engineering unit where the highest output from the sensor is achieved during the calibration...

Page 24: ...cimal point that should appear in the historical data and in the numerical data field at the bottom of the bar graph Calibrate The Calibrate button provides a simple 4 step process for calibrating the...

Page 25: ...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...

Page 26: ...from a list of units predefined in the pull down menu Value for a Single Pulse The number of pulses is multiplied by this number to scale it to rainfall water flow etc If a pulse channel is connected...

Page 27: ...k to the main screen If no settings have changed Exit will occur immediately If settings have changed but not saved yet a message will appear that asks the user if they would like to save them now If...

Page 28: ...D Negative battery connection VBAT Positive battery connection Right Hand Connector V Switched sensor power CH1 Analog channel 1 input GND Sensor ground V Switched sensor power CH2 Analog channel 2 in...

Page 29: ...er 800 876 1172 globalw com 29 XVIII 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 Gl...

Page 30: ...nd recalibrate if necessary saving the setup file first as described in section XI c Check the sensor connections and clean them according to the manufacturers recommendations Issue Cannot communicate...

Page 31: ...pecific problems relating to the product Be prepared to describe the problem you are experiencing including specific details of the application installation and any additional pertinent information In...

Page 32: ...risks of electrical equipment operating within certain voltage ranges According to the following standards EN61010 1 2001 Electro Magnetic Directives 2004 108 EC Requirements to prevent electrical and...

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