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WL15
Water Level Logger User’s Guide
Copyright © Global Water Instrumentation, Inc. 2002
Global Water ● (800)876-1172 ● www.globalw.com
6/5/2002
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Requirements
Windows 95, 98, ME, NT, 2000 or XP*
•
486DX 66MHz, 16MB RAM (Windows 95 base machine; later operating systems may require
•
higher specifications)
Available COM port
•
Contact Information
Global Water Instrumentation, Inc.
11257 Coloma Road
Gold River, CA 95670
Toll Free: 1(800)876-1172
Local: 1(916)638-3429
Fax: 1(916)638-3270
E-mail: globalw@globalw.com
Web: www.globalw.com
Terminology
In order to better understand this product manual, please be aware of the following terminology
and formatting usage.
Bolded terms (i.e.
puter monitor screen or a phrase to be emphasized. Context will dictate which is indicated.
Since it is assumed that users of this manual are familiar with mouse usage, many mouse operations are implied. The term “click” or “clicking” means to press and release the left mouse button.
Similarly, “double-click” means to press and release the left mouse button twice in quick succession. For example, the phrase “Click the
pointer to the task bar and click the
tion, it will be specified in the documentation.
The term “select” means to move the mouse pointer over the indicated target. For example the
phrase “Select
after the
View
Toolbars
menu has been displayed. “Select” is normally used when the mouseover action
will cause additional menus to display.
) indicate either a keyboard key, a word or icon that appears on your com-
bold
button” should be interpreted as “Move the mouse
start
button.” If any other mouse button is used in an opera-
start
from the
menu” means to move the mouse pointer over
View
Toolbars
The → symbol is used with submenu operations where the user should click the first and last
items in the string separated by →. For example, the phrase “Click on
means click on
File
, select
and click on
New
Folder
.
File → New → Folder
When the documentation directs you to exit a program or window, you can generally do so by
clicking the x graphic in the upper right-hand corner or by clicking
*Windows® 95, 98, ME, NT, 2000 & XP are trademarks of the Microsoft Corporation
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Global Water ● (800)876-1172 ● www.globalw.com
File → Exit.
x graphic
”
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Table of Contents
CHAPTER 1: INTRODUCTION .............................................................................. 5
THE WL15 W
F
EATURES
C
HECKLIST
G
ETTING TO KNOW THE
ATER LEVEL LOGGER
.................................................................................................................................... 5
................................................................................................................................... 6
WL15 ..................................................................................................... 7
CHAPTER 2: SETUP .............................................................................................. 9
I
NSTALLING THE
S
YSTEM TIME CHECK
G
LOBAL LOGGER SOFTWARE INSTALLATION
H
ARDWARE INSTALLATION
General Installation Tips ........................................................................................................ 14
Groundwater Installation ........................................................................................................ 15
Surface Water Installation ...................................................................................................... 15
Special Installations ............................................................................................................... 16
S
TORING THE
WL15 ................................................................................................................. 9
................................................................................................................... 9
.......................................................................................................... 14
WL15 ................................................................................................................... 16
CHAPTER 3: USING GLOBAL LOGGER SOFTWARE ...................................... 17
H
ARDWARE CONNECTION
G
LOBAL LOGGER STARTUP
G
LOBAL LOGGER FUNCTIONS
Sample Continuously/Real-Time Values ............................................................................... 19
Get Settings ........................................................................................................................... 19
Get History Data .................................................................................................................... 19
Clear Memory ........................................................................................................................ 21
Synchronize Time .................................................................................................................. 22
Setup ..................................................................................................................................... 22
Datalogger Name and Sensor Warmup Time ..................................................................................................23
Calibration ...................................... ................................................................... ...............................................24
Recording Interval and Memory Management .................................................................................................26
........................................................................................................... 17
........................................................................................................ 17
CHAPTER 4: MAINTENANCE ............................................................................. 29
B
ATTERY
C
ALIBRATION
S
ENSOR SCREEN SCREENING
.................................................................................................................................... 29
............................................................................................................................. 30
..................................................................................................... 30
CHAPTER 5: TROUBLESHOOTING ................................................................... 31
C
OMM FAILURE
S
ENSOR READING INCORRECTLY
W
ATER IN THE VENT TUBE
O
THER ISSUES
.......................................................................................................................... 31
......................................................................................................... 32
........................................................................................................................... 32
CHAPTER 6: WARRANTY ................................................................................... 34
APPENDIX A: WL15 DETAILED SPECIFICATIONS ........................................... 35
D
ATALOGGER
S
ENSING ELEMENT
H
OUSING
C
....................................................................................................................................... 36
ABLE
............................................................................................................................. 35
..................................................................................................................... 36
.................................................................................................................................... 36
APPENDIX B: WORKSHEETS ............................................................................. 37
C
ALIBRATING THE BAR GRAPH TO HIGHER OR LOWER RANGE
.............................................................................................. 5
............................................................................... 10
..................................................................................................... 19
................................................................................................ 32
.................................................... 37
Global Water ● (800)876-1172 ● www.globalw.com
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C
ALIBRATING LEVEL SENSORS FOR DEPTH TO WATER READINGS
............................................... 38
APPENDIX C: CABLE CONFIGURATION ........................................................... 39
APPENDIX D: TERMINAL PROGRAMMING ....................................................... 40
C
OMMUNICATION COMMANDS FOR WINDOWS DATALOGGER
........................................................ 40
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Page 5
Introduction
Introduction
1
The WL15 Water Level Logger
Congratulations on your purchase of the Global Water WL15 Water Level Logger. This instrument has
been quality tested and approved to provide accurate and reliable water level (water pressure) measurements. We are confident you will find the WL15 to be a valuable asset for your applications. Should you
require assistance, our technical staff will be happy to help.
The WL15 provides a datalogger with a submersible pressure transducer for remote monitoring and recording of water level, flow or pressure data. This highly reliable and accurate water logger records 24,400
readings and is programmable from one reading per second to one reading per day. Ranges of 0-3', 0-15', 030', 0-60', 0-120' and 0-250' are available. A 25' cable is standard, and optional cable lengths are available
up to 1000'.
The WL15’s datalogger is housed in a weather-resistant cylindrical enclosure that slips inside a 2-inch pipe.
The logger is easily adapted with standard hardware for well head mounting or other installations. The
WL15 includes Windows-based software, allowing easy upload of data to standard spreadsheet programs
on a PC computer.
The WL15's level sensor electronics are fully encapsulated with marine-grade epoxy, providing superior
moisture protection over O-ring seals. During this process, the vent tube is sealed directly to the sensing
element, preventing any moisture from damaging the sensor’s electronic components.
The level sensor uses a unique silicon diaphragm to interface between the water and the sensing element.
This silicon diaphragm is highly flexible and touches the sensing element, producing a sensor with exceptional linearity and very low hysteresis. The pressure transducer utilizes a stainless steel micro-screen cap to
protect the sensing element. This protective cap has hundreds of openings, making fouling the sensor with
silt, mud or sludge virtually impossible.
Features
Data
Windows based Global Logger* software
•
Tabular display/printout
•
Data in standard spreadsheet format
•
Communication cable included (RS232C)
•
Logger
Weather resistant enclosure
•
Fits inside 2” pipe
•
Records 24,400 readings
•
12 bit or 1/4,000 resolution
•
Battery powered
•
Cable
Marine grade, heavy urethane jacket
•
Barometric pressure vent
•
Lengths up to 1000’
•
Sensor
Fully encapsulated submersible pressure trans-
•
ducer
Amplified and temperature compensated
•
High accuracy
•
3/4” diameter wet-wet transducer (no vent mois-
•
ture problems)
*Copyright © Global Water Instrumentation, Inc. 2001
Global Water ● (800)876-1172 ● www.globalw.com
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Chapter 1
Checklist
Your WL15 was carefully inspected and certified by our Quality Assurance Team before shipping. If any
damage has occurred during shipping, please notify Global Water Instrumentation, Inc. and file a claim
with the carrier involved. Use the checklist to ensure that you have received everything needed to operate
the WL15. Your sensor has been inscribed with the sensor range for easy identification.
Cable
Communication Cable
Global Logger Software*
Datalogger
User Manual
Level Sensor
WL15 (Datalogger, Level Sensor and Cable)
•
User Manual
•
Communication Cable (RS232C COM Cable)
•
Global Logger Software (3 1/2” Floppy Diskette)
•
*Copyright © Global Water Instrumentation, Inc. 2001
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Global Water ● (800)876-1172 ● www.globalw.com
Page 7
Getting to Know the WL15
The COM port can connect to a PC serial port using
the included Communication Cable.
Introduction
COM port
lithium battery
The Communication Cable has two
different connectors. Connect the
DB-9 female connector to your PC
and the 4-pin mini socket* to your
Datalogger.
Unscrew logger cap to access lithium battery.
DB-9 female connector 4-pin mini socket
Appendix C: Cable Configuration
*See
Global Water ● (800)876-1172 ● www.globalw.com
, page 39
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Chapter 1
The water level sensor is located inside the
sensor housing, near the mesh screen.
sensor location
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Page 9
Setup
Setup
Installing the WL15
System Time Check
Before you install the software, check the accuracy of the time and date on your computer. The WL15 will
be programmed with this information.
To verify your system time in Windows, click
tings → Control Panel
from the task bar.
Start → Set-
2
Global Water ● (800)876-1172 ● www.globalw.com
Double-click the
Date/Time
icon.
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Chapter 2
Verify that your system is set to the correct time. If not, make the necessary
changes and click the Apply button followed by the OK button. Exit the control
panel.
Global Logger Software Installation
Insert the 3 1/2” floppy diskette labeled “Global Logger Software Version x.xx” (where x.xx is a version
number such as 1.36) into your computer’s floppy disk drive. Normally, the floppy will be the computer’s
“A” drive.
My Computer
).
icon on your desktop.
Double-click the floppy icon (normally listed as
Double-click the
3 ½ floppy (A:)
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Setup
Click on the file
Global Logger.exe
.
Global Water ● (800)876-1172 ● www.globalw.com
Edit → Copy
Click
from the menu bar.
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Chapter 2
Save the file to a directory of your choosing. Note, it should be a location you will easily remember. 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 of the
address field. Click on the
Local Disk (C:)
icon or appropriate main system drive designation.
down carrot
The directory
New Folder
lected for typeover. Type
If the directory
listed, click
the menu bar.
should now be created and automatically se-
Global Logger
and press the
enter
key.
Global Logger
is not
File → New → Folder
from
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Page 13
Double-click on the new
Global Logger
directory.
Setup
Copying…
A
dialog box should now display.
Wait for the copy process to complete.
Edit → Paste
Click
from the menu bar.
Global Water ● (800)876-1172 ● www.globalw.com
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Chapter 2
To create a desktop shortcut, right-click the
and click on Desktop (create shortcut).
Global Logger.exe
file you previously saved, select
Send To
You can now access your Global Logger* software directly from the desktop.
Hardware Installation
General Installation Tips
The WL15 has many applications and therefore many installation options. The WL15’s pressure sensor
•
is fully submersible and may be suspended by its waterproof cables in the water to be monitored.
The data logger is not waterproof. It is water-resistant. This means that condensation, which can
•
build up inside the enclosure during humid conditions, should not affect the performance of the WL15.
However, if the data logger is submerged in water, it will corrode the electronics and cause it to stop
working properly. Please ensure that the data logger will be clear from flooding and out of direct rainfall.
Do not install the WL15 in applications that contain solvents
•
rate the cable and the sensing element.
The accuracy of the sensor readings can be affected by such adverse conditions as overpressure, lighten-
•
ing strikes, improper care/handling, and physical damage or abuse.
. Over time, many solvents can deterio-
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Page 15
Setup
The WL15’s cable contains a vent tube that allows for barometric pressure compensation.
•
Do not allow
the vent tube to become kinked or obstructed as this may cause erroneous readings.
Install your WL15 so that it is easily accessible for calibration purposes. You may need to remove and
•
reinstall it in the future, so plan ahead!
The pressure sensor will not function correctly if buried by mud, silt, leaves, or other debris. Install the
•
sensor in a way that avoids these conditions.
Groundwater Installation
For best results suspend the pressure sensor in a 2” monitoring well near the well screen. The sensor
•
may be installed in well diameters 1” and up.
For a 2” diameter pipe (or larger), the sensor can be inserted directly. Slowly lower the sensor into the
•
well. Warning:
sensor
. The top of the data logger will rest on the top of the well pipe. A slip cap or a locking well cap
Do not allow the sensor to “freefall” down the well, this may cause damage to the
can conceal the WL15. The cable length of the WL15 should be sized so the sensor will be positioned
below the lowest expected water level, which is not necessarily the bottom of the well. The correct cable length is measured from the top of the data logger to the bottom of the sensor. The sensor’s measuring range should be slightly larger than the expected total amount of change in water level.
To shorten the cable in a 2” diameter or larger well, coil it around a 1” diameter stick or pipe and secure
•
the cable at both ends with tie wraps or tape. Warning: Do not kink the cable; this may damage the
internal vent tube
.
The WL15 can be adapted to larger or smaller well casings by using standard PVC pipe reducers and
•
fittings or Global Water’s Inside Well Option.
As factory programmed, the WL15 records depth of water above the sensor. If you want to use your
•
WL15 to record depth to water readings, follow the worksheet
Calibrating Level Sensors for Depth to
Water Readings*.
Surface Water Installation
The sensor may be submerged at the monitoring point and hung from its cable. It is recommended to
•
protect the sensor and datalogger inside a 4” PVC drainpipe that will act as a protective stilling well.
PVC schedule 40, or ABS sewer drainpipe is recommended. PVC schedule 40 electrical conduit has
UV protectors and pre-formed “sweeps” or bends that enable it to conform to the contours of a riverbank. The level sensor will slide down through 45° or 90° sweeps. The pipe may be buried in the riverbank, secured with rocks, or fastened to the bank with large staples made by bending pieces of concrete
reinforcing steel in half and driving them into the bank. Put a cap on the bottom end of the pipe to allow easy water flow past the sensors. Drop the sensor until it touches the bottom of the stilling well and
then pull it up slightly and secure the cable. The pipe should have several ½” diameter holes drilled
near the sensor location in order to eliminate any velocity effects on the sensor. In addition, a smaller
¼” hole should be drilled near the top of the pipe to allow air movement when the water goes up and
down. A standard slip cap or a locking well cap can be used to secure the WL15. The pipe can also be
adapted for a screw-on cap.
Appendix B: Worksheets
*See
Global Water ● (800)876-1172 ● www.globalw.com
, page 38
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Chapter 2
In areas where vandalism is prevalent, 4” diameter galvanized steel pipe may be used for any exposed
•
pipe. Plastic pipe, adapted to the steel pipe above water, may be used for the underwater section. A
screw-on galvanized cap can then be used to cover the data logger. Two small pipe wrenches are required to access the WL15, but this installation is essentially bulletproof and vandal-proof.
Special Installations
For flumes and weirs Global Water provides the Weir Stick Water Level Logger. This logger/sensor
•
combination can be mounted inside a 2” diameter pipe that acts as its own stilling well, or the Weir
Stick can be mounted in an existing stilling well. The weir stick is 3’ overall in length with a 2’ measuring range.
For measuring pressure in pipes, the level sensor may be purchased with a ¾” NPT thread on the sens-
•
ing end. The sensor threads can be adapted to existing ball valves with standard pipefittings.
The WL15 Sewer Pipe Flow Option includes a level sensor built into a protective “mouse” housing and
•
attached to a 12” stainless steel strap. When the sensor/straps are installed at the invert of a sewer or in
a pipe, the data logger can be attached to a sewer’s stair rungs. If there is enough slack in the cable, the
data logger can be accessed from the manhole above the stair rungs.
When installed in a pipe that is under 12” diameter, the steel straps spring into the pipe, holding the sen-
•
sor in place. Additional fasteners are usually not required for this type of installation.
For a sewer pipe over 12” diameter, the sensor’s steel straps must be mounted into the pipe. The straps
•
can be secured with molly or concrete bolts, or with marine-grade epoxy.
Storing the WL15
The WL15 may be stored without any special provisions. Place the datalogger and sensor inside a bag to
keep the instrument clean and store on a shelf or hang on a wall.
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Using Global Logger Software
Using Global Logger Software
3
Hardware Connection
Connect the DB-9 female connector of the included communication cable (RS232C) to the COM 1 serial
port on your computer. If COM 1 is being used, either disconnect and/or disable the device on COM 1 or
connect to COM 2*.
4-pin mini socket
Connect the 4-pin mini socket of the
communication cable (RS232C) to
your WL15 COM port.
Global Logger Startup
Double-click the Global Logger icon on your desktop if you created a desktop shortcut during
software setup. Otherwise, access the directory in which your the
stored 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.exe
Global Logger Software Installation
file is
**.
* See Comm Failure, page 32.
Global Logger Software Installation
**See
Global Water ● (800)876-1172 ● www.globalw.com
, pages 10 – 14
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Chapter 3
The Global Logger main window will display data in the following fields:
Logger Name, Date/Time, Re-
cording Interval and Recordings in Memory.
Access the Global Logger functions
ory, Synchronize Time
and
Setup
functions can also be accessed through
Sample Continuously, Get Settings, Get History Data, Clear Mem-
through the main menu check box and buttons. All Global Logger
Action
on the menu bar.
The bar graph on the left side of the screen indicates current depth of sensor. For example, the graph in the
following screen shot displays a 120 foot sensor with a reading of 79.83 feet. This data indicates that the
sensor is currently at a depth of 79.83 feet. Sensors are calibrated to a variety of unit specifications (i.e. meters), so your bar graph readings may differ slightly.
depth bar graph
Global Logger
functions
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Global Logger Functions
Sample Continuously/Real-Time Values
Using Global Logger Software
To display real-time values every second, select the
Sample Continuously
checkbox.
Readings will display below the depth bar graph. To stop readings, unselect checkbox.
Note, that real-time data is not recorded; therefore, you cannot retrieve it from WL15
memory.
current reading
past readings
Get Settings
To refresh information in the Global Logger main window, click the
update the
Logger Name, Date/Time, Recording Interval
and
Get Settings
button. This action will
Recordings in Memory
fields.
Get History Data
To retrieve logged data from memory, click the
depend on the number of data points recorded (more recordings equals longer upload time). To minimize
long upload times, clear memory* after backing it up to disk**.
* See Clear Memory, pages 21 – 22
Get History Data
**See
Global Water ● (800)876-1172 ● www.globalw.com
, pages 20 – 21
Get History Data
button. The speed of your upload will
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Chapter 3
Historical Data Viewer
A
window will display. This window lists each data point by date/time and reading value. If there are more data points in memory than will fit in the data view window, use the scroll bar
to scroll through the list of readings.
readings listed by Date/Time and
reading value (in this case Feet)
use scroll bar to
scroll through list
If you want to save current readings, click the
Save As
A
window will display. If you
want to save your file to a directory
other than the one displayed, click the
down carrot of the
Save in:
field and
click on the device (i.e. hard disk drive,
floppy disk drive, etc.) you want to save
the file to.
Save to File
button.
down carrot
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Page 21
Double-click the directory or subdirectory you want to save to. If you want to
change the file name click anywhere in
File name:
the
field and type the desired
name. However, do not change the .csv
extension. This extension ensures the
file will be recognized as a comma separated value (*.CSV) file. You can open
CSV files in spreadsheet programs such
as Microsoft Excel*. Click
Save
to save
the file.
Using Global Logger Software
change name in
file name field
To remove zero readings, click the
ing. Since the pack function does not change the readings stored in memory, you will need to
Pack
button. Note, this operation will not remove the initial zero read-
Save to File
to preserve the pack operation. If you exit and then reenter the Historical Data Viewer window, all read-
ings (including zero readings) stored in memory will display regardless of any prior pack operation.
Click OK to exit the
Historical Data View
window.
Clear Memory
To clear your WL15’s memory of readings click the
Clear Memory
button.
A confirmation dialog box will display. Click
No
to keep readings.
*Windows® Excel is a trademark of the Microsoft Corporation
Global Water ● (800)876-1172 ● www.globalw.com
Yes
to clear history or
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Chapter 3
If you click
Yes
Standby
, a
graphic will display in the middle of
your monitor screen while the memory is purged.
Synchronize Time
To synchronize your WL15’s internal clock to your computer’s clock*, click the
Synchronize Time
button.
Standby
A
graphic will display in the middle of your monitor
screen while synchronizing.
Setup
Note that your Water Level Logger has come completely setup from our factory. It has been calibrated and
tested for optimal accuracy and performance. If you choose to recalibrate your sensor, use the following
procedures.
To begin calibration and/or to change time interval settings, click the
Setup
window will display.
Setup
button. A
Global Water
System Time Check
*See
Page 22
, pages 9 – 10
Global Water ● (800)876-1172 ● www.globalw.com
Page 23
Datalogger Name and Sensor Warmup Time
Using Global Logger Software
If you want to change the datalogger name, click in the
Global Water recommends that the
Sensor Warmup Time
Name
field and type in a new name.
field be set at 3 seconds to supply the level sensor with adequate power for accurate data measurements. This setting dictates the length of time power is
applied to the level sensor before the datalogger takes a reading.
For example, if you set your WL15 to record a reading every 20 minutes at fixed intervals and the process
begins at 12:00:00, power will be applied to the level sensor immediately and a reading taken at 12:00:03.
At 12:20:00, power will again be applied to the level sensor, and the datalogger will take a reading at
12:20:03. Note that if the recording interval fields are less than or equal to the
Sensor Warmup Time
field, the sensor is powered continuously.
To change warmup time, click in the
Sensor Warmup Time
field and enter the desired time (0 –15 seconds). You may also click the up/down arrows to the right of the text field to increase or decrease the value
by 1.
recording interval
fields
Global Water ● (800)876-1172 ● www.globalw.com
Page 23
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Chapter 3
Calibration
Change the
feet, etc.) by clicking in the field and typing the unit name. Note that the
Sensor Type or EU
(engineering units) field to the unit type you are calibrating to (i.e. meters,
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
Low Raw
and
fields before continuing (in this case
64435
and
12704
). Click the
Calibrate
button.
High Raw
Enter the maximum unit range of the
level sensor (
120
for a 120’ sensor in
this example) in the highest value text
field and click the
Next
button.
If performing a dry calibration, insert the sensor into your water pressure meter and set to full scale range of
your WL15. If performing a wet calibration, insert level sensor to a water depth of at least 10% of full scale
range. For example a 120’ sensor should be calibrated at a depth of at least 12’. Calibrating at greater percentages (up to 100%) provides greater accuracy. Calibration depth should be measured from water surface
to sensor tip.
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Page 25
For both wet and dry calibrations, wait
at least five seconds for the level sensor to adjust to current PSI level.
Click the
Next
button.
Using Global Logger Software
Enter 0 in the
and click the
lowest value
Next
button.
text field
For dry calibrations, release the level sensor from water pressure meter. For wet calibrations, take level
sensor out of water.
For both wet and dry calibrations, wait
at least five seconds for the level sensor to adjust to 0 PSI. Click the Finish
button.
Note, that if performing a wet calibration at a fraction of total sensor range, the bar
graph on the left side of the main
at the calibration depth instead of actual total sensor range. All other logger operations
will perform correctly. To revise calibration settings so that the graph will function correctly, follow the worksheet
in Appendix B*.
Appendix B: Worksheets
*See
Global Water ● (800)876-1172 ● www.globalw.com
, pages 37
Global Logger
window will interpret full scale range
Calibrating the Bar Graph to Higher or Lower Range
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Chapter 3
Verify that
High EU
and
Low EU
fields reflect desired unit readings. Also, verify that the
High Raw
reflects a range of 60,000 – 65,000 and that the Low Raw field reflects a range of 10,000 – 15,000.
Adjust the
Decimal Places
field according to the following chart (i.e. a 3’ sensor should be adjusted to three
decimal places).
wl sensor range decimal places
3’ 3
15’ 2
30’ 2
60’ 1
120’ 1
250’ 1
field
Recording Interval and Memory Management
Select the interval type by clicking the down carrot of the
specified interval, click
for fixed interval
.
Sample
down carrot
field. To repeatedly record values at a
Note, that if you choose to record at fixed intervals, memory will fill
up according to chart on the right. Refer to battery maintenance
chart for battery life to available memory comparisons*.
Battery
*See
Page 26
, page 29
Global Water ● (800)876-1172 ● www.globalw.com
Recording Interval Time
1 second 6 hours, 49 minutes
1 minute 17 days
5 minutes 84 days
15 minutes 254 days
30 minutes 509 days
1 hour 1018 days
Page 27
Using Global Logger Software
Time Frame Readings per time
0-19 seconds As fast as possible 1000
To record values according to a logarithmic curve, click
for logarithmic interval
. See chart for timeline speci-
fications.
20-59 seconds 1 per 1 second 40
60-599 seconds 1 per 12 seconds 45
10-99 minutes 1 per 2 minutes 45
100-999 minutes 1 per 200 minutes 45
1000-9999 min-
To take readings upon exceeding a specified unit range, click
utes
1 per 1440 minutes 45
upon exception
unit
. This setting sets the logger
Expected total readings
during Time Frame
to record a single reading after detecting a ± variance from the previously recorded exception reading.
Click the long bar appearing at the bottom of the Global Logger Setup menu
Click and hold toggle slider with
left mouse button (i.e. do not click
and release). Move slider left or
right to select desired exception
range, and release mouse button.
Click OK to preserve selection or
Cancel
to revert to the previous
toggle slider
setting.
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 water level changes (rises or falls) by 10.2 feet from the previous
exception reading.
Set the recording interval digit, by clicking in the
every
text field, and typing the desired number. You may
also click the up/down arrows to the right of the text field to increase or decrease the value by 1.
up/down arrows
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.
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Page 27
Page 28
Chapter 3
Wrap records at end of storage
The
checkbox dictates whether or not the logger continues to record readings after its memory is filled. To overwrite readings in synchronous order (earliest readings are overwritten first) after memory is filled, click the checkbox. To preserve readings and stop recording after memory
is filled, leave box unchecked.
After calibrating and/or changing interval recording settings, click the OK button. To cancel changes, click
Cancel
.
You may also manually change WL15 settings directly using a terminal program*.
Appendix D: Terminal Programming
*See
Page 28
, page 40
Global Water ● (800)876-1172 ● www.globalw.com
Page 29
Maintenance
Maintenance
4
Battery
Global Water recommends that the battery voltage be physically checked based on your recording interval*.
Refer to the following table.
Note, that the WL15 uses 60µA while “sleeping” and 3mA plus the signal current while taking readings.
This table is based on the worst-case scenario where the sensor is providing the maximum signal of 20mA.
Temperature can also affect battery life. A WL15 in an environment that has a sustained temperature of 23°
C will run 5% longer than a unit that has a sustained temperature of 0° C.
Recording Interval Theoretical Battery Life Recommended Time Be-
tween Battery Check
1 second 43 hours 36 hours
1 minute 34 days 1 month
30 minutes 424 days 6 months
1 hour 526 days 6 months
1 day 685 days 6 months
Checking the battery requires that the WL15 cap be
unscrewed. The battery should be visible and can
be gently removed from the housing with fingers or
a pair of pliers.
Recording Interval and Memory Management
*See
Global Water ● (800)876-1172 ● www.globalw.com
, pages 26 – 28
Page 29
Page 30
Chapter 4
The battery must be disconnected from the battery
strap.
but will not lose any recordings or settings.
Test the battery with a voltage meter. The sensor will not work reliably if the battery voltage is below
7.5V. If the battery needs to be replaced use a 9V lithium battery for reliable service. Re-attach the battery
to the battery strap and gently slide it into the housing. Screw the cap on to the data logger housing, being
careful not to pinch any of the wires.
Note, that the WL15 will stop recording,
Calibration
The level sensor’s calibration must be periodically verified. Global Water recommends checking the sensor’s calibration with a sounder or other measuring device once every 6 months.
Sensor Screen Cleaning
The screen on the end of the sensor must be periodically checked for clogging from mud and sludge. Wash
the screen with clean water and/or scrub it gently with a toothbrush. Do not insert objects through the
screen, as this may cause damage to the sensor.
Page 30
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Page 31
Troubleshooting
Troubleshooting
5
Comm Failure
If Global Logger software displays
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 correctly set up to use your communication channel 1 (COM 1). Refer
•
to the settings below for comparison.
Comm Failure
in the
Logger Name
field, perform the following steps
* See Hardware Connection, page 17
Battery
**See
Global Water ● (800)876-1172 ● www.globalw.com
, page 29
Page 31
Page 32
Chapter 5
If you only have access to COM 2, then an *.ini file must be created. Open
•
Notepad
and type the text
exactly as it appears in the following screenshot. Change the directory to the Windows folder of your
main drive if you are using Windows 95, 98, ME or XP or to the
you are using Windows NT or 2000. Save the file as
Make sure that no other software or device is using COM 1, such as an infrared port or palm synching
•
global logger.ini
WINNT
.
folder of your main drive if
software.
Sensor Reading Incorrectly
Verify that the vent tube has not been kinked or sealed. The sensor uses this tube to compensate for
•
barometric pressure changes.
Clean the sensor following the maintenance instructions*.
•
Recalibrate the sensor using the calibration methods described in the
•
ual**.
Calibration
section of this man-
Water in the Vent Tube
If water gets into the cable’s vent tube, place it next to a heater for 24 hours to dry the inside of the cable.
Other Issues
Refer to the manual for proper set-up.
•
Check all connections.
•
Call Global Water for tech support: 800-876-1172 or 916-638-3429 (many problems can be solved over
•
the phone). Fax: 916-638-3270 or Email:
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 or the invoice number.
5. Repair instructions and/or specific 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.
globalw@globalw.com.
When calling for tech support,
* See Sensor Screen Cleaning, page 30
Calibration
**See
Page 32
, pages 24 – 26
Global Water ● (800)876-1172 ● www.globalw.com
Page 33
In the event that the equipment needs to be returned to the factory for any reason, please call to obtain
•
Troubleshooting
an RMA number (Return Material Authorization). Do not return items without an RMA number displayed on the outside of the package.
Clean and decontaminate the WL15 if necessary.
Include a written statement describing the problems.
Send the package with shipping prepaid to our factory address. Insure your shipment, since Global
Water’s warranty does not cover damage incurred during transit.
Global Water ● (800)876-1172 ● www.globalw.com
Page 33
Page 34
Chapter 6
Warranty
Global Water Instrumentation, Inc. warrants that its products are free from defects in material and workmanship under normal use and service for a period of one year from date of shipment from the factory.
Global Water’s obligations under this warranty are limited to, at Global Water’s option: (I) replacing or (II)
repairing; any products determined to be defective. In no case shall Global Water’s liability exceed the
products original purchase price. This warranty does not apply to any equipment that has been repaired or
altered, except by Global Water Instrumentation, Inc., or which has been subject to misuse, negligence or
accident. It is expressly agreed that this warranty will be in lieu of all warranties of fitness and in lieu of the
warranty of merchantability.
The warranty begins on the date of the invoice.
6
Page 34
Global Water ● (800)876-1172 ● www.globalw.com
Page 35
WL15 Detailed Specifications
Appendix A: WL15 Detailed Specifications
Datalogger
Inputs
Channels: 1 Analog
•
Range: 4 – 20 mA
•
Storage Resolution: 1 / 65535 (16 bit)
•
A/D Resolution: 1 / 4095 (12 bit)
•
Data Storage
Memory Size: 2MB (24,000 recordings)
•
Type: non-volatile Flash
•
Intervals: 1 – 256 seconds, 1 – 256 minutes, 1 – 256 hours, or 1 – 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: 9V Lithium (1A / h)
•
Back-up Battery: 3V Lithium (950 mA / h)
•
Sleep Current: 60µA
•
Wake Current: 3 mA + Sensor (4 – 20 mA)
•
Communication Current: 100 mA
•
Environmental
Operating Temperature: -40 to 75° C (-40 to 170° F)
•
Storage Temperature: -50 to 90° C (-60 to 200° F)
•
Humidity: 0 to 95% Non-Condensing (Conformal Protection Coating)
•
Physical Dimensions
Body OD: 45mm (1.77”)
•
Cap OD: 57mm (2.24”)
•
Length: 315mm (12.4”)
•
Weight: ~450g (16 oz.)
•
A
Global Water ● (800)876-1172 ● www.globalw.com
Page 35
Page 36
Appendix A
Sensing Element
Output: 4 – 20 mA
•
Range: 0 – 3’, 0 – 15’, 0 – 30’, 0 – 60’, 0 – 150’, 0 – 250’
•
Accuracy: ±0.2% FS (35° F to 70° F)
•
Linearity and Hysteresis: ±0.1% FS
•
Resolution: Infinitesimal (Analog)
•
Operating Voltage: 10 – 36 VDC
•
Current Draw: 4 – 20 mA
•
Warm-up Time: 10 ms minimum
•
Operating Temperature: -40 to +85°C (-40 to +185°F)
•
Size of Probe: 3/4" diameter x 4 1/2" long
•
Weight: 0.5 lb
•
Overpressure: X4
•
Burst Pressure: X10
•
Material: Fluorosilicone
•
Type: Differential (Wet/Wet)
•
Compensated Temperature Range: 0 to 50°C (32 to 122°F) submerged
•
Housing
Material: 304L SS
•
Diameter: 19 mm (0.75”)
•
Length: 200 mm (8”)
•
Weight: ~115g (4 oz)
•
Cable
Conductors: 4 each 22 AWG
•
Jacket Material: 87A shore hardness Polyurethane
•
Optional Jacket: Fluorinated Ethylene Propylene (FEP) Teflon
•
Cable OD: 7.8 mm (0.307”)
•
Vent Tube: HD Polyethylene
•
Shield: Aluminum Mylar
•
Temperature range: -30 – 85°C (-22 – 185°F)
•
Weight: ~65 g / m (0.7 oz / ft)
•
Page 36
Global Water ● (800)876-1172 ● www.globalw.com
Page 37
Worksheets
Appendix B: Worksheets
B
Calibrating the Bar Graph to Higher or Lower Range
With some sensors it is either impractical or unfeasible to reach the full-scale or lower scale of its range.
This will not affect the actual reading of the datalogger but it will cause the bar graph to work incorrectly.
Here are the equations for finding 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 using this equation:
m = (High Raw – Low Raw) / (High EU – Low EU)
m = ___________
Next find the y-intercept:
b = High Raw - (m x High EU)
b = ___________
Now you can calculate the new “Raw” value for any Engineering Unit.
New Raw = (m x New EU) + b
New Raw = ___________
Finally, enter these new “Raw” values into your datalogger and verify the readings are correct*.
Calibration
*See
Global Water ● (800)876-1172 ● www.globalw.com
, pages 24 – 26
Page 37
Page 38
Appendix B
Calibrating Level Sensors for Depth to Water Readings
Note, that to take depth to water readings, the bar graph must be calibrated to the full scale of the sensor. Follow the worksheet
ing the Bar Graph to Higher or Lower Range*.
The first step is to find the Total Depth of the sensor. This is the distance from the end of your sensor to your datum. (Cable lengths from
the factory 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 this value by us-
ing the following equation:
Sensor Depth = | High EU______ - Low EU______ |
Sensor Depth = ___________
Now you can find your new Engineering Units using these steps:
New Low EU = Total Depth
New Low EU = ___________
New High EU = Total Depth – Sensor Depth
New High EU = __________
Finally, enter these New EU values into your datalogger and verify
the readings are correct**.
Calibrat-
* See Appendix B: Worksheets, page 37
Calibration
**See
Page 38
, pages 24 – 26
Global Water ● (800)876-1172 ● www.globalw.com
Page 39
Cable Configuration
Appendix C: Cable Configuration
The following diagram details the pin layout of the male communications cap on the WL14/15 Datalogger
series. The chart explains the communications wiring.
Comm. Cap
Pin Number
1 Green Dig. Ground 5
2 Blue DTR 4
3 Violet Rx 3
4 Red Tx 2
Comm. Cap
Wire Color
Function 9 pin D-sub
Pin Number (Male)
C
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Page 39
Page 40
Appendix D
Appendix D: Terminal Programming
D
Communication Commands for Windows Datalogger
The following is a chart of commands that can be sent to the Windows Datalogger through a terminal program.
Command 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 time data point
! Set description
1 Get description
@ Set Units
2 Get Units
# Set Raw Scale
3 Get Raw Scale
$ Set Engineering Unit Scale (EU)
4 Get Engineering Unit Scale (EU)
N Set Name
n Get Name
S Set Sample interval
s Get Sample interval
Page 40
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