RBR 1050 Series User manual

27 Monk Street •Ottawa, Ontario •Canada K1S 3Y7
[phone] •fax [phone] •[email protected]
www.rbr-global.com
Submersible Data Logger
User’s Manual
January 2007

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Table of Contents
About this Manual.......................................................................................................................... 1
Warranty Statement....................................................................................................................... 2
Basic operating instructions........................................................................................................ 3
Introduction.................................................................................................................................. 3
Opening and closing the logger.................................................................................................. 3
1050 and 2050 series loggers ................................................................................................ 3
XR loggers .............................................................................................................................. 3
TR-1060 loggers..................................................................................................................... 4
Changing the batteries................................................................................................................ 4
1050 and 2050 series loggers ................................................................................................ 5
XR loggers .............................................................................................................................. 5
TR-1060 loggers..................................................................................................................... 5
Communicating with the logger................................................................................................... 6
1050/2050 and XR series loggers .......................................................................................... 6
Using the internal data port ................................................................................................ 6
Using an underwater connector.......................................................................................... 6
Using an RF modem........................................................................................................... 7
TR-1060 loggers..................................................................................................................... 8
Deployment................................................................................................................................. 8
Maintenance and repairs............................................................................................................. 9
Support kits............................................................................................................................. 9
O-rings .................................................................................................................................... 9
Drying agent.......................................................................................................................... 11
Repairs.................................................................................................................................. 11
Calibration............................................................................................................................. 11
Software........................................................................................................................................ 12
Introduction................................................................................................................................12
Software installation and removal......................................................................................... 12
Installing the software....................................................................................................... 12
Uninstalling the software .................................................................................................. 12
Upgrading the software .................................................................................................... 12
Software operation.................................................................................................................... 13
Main window layout............................................................................................................... 13
Setup – Configuring the logger............................................................................................. 14
Setting the clock - Sync to PC.......................................................................................... 15
Start of logging, End of logging, Sampling period and Averaging period......................... 15
Setup for the TWR-2050 logger ....................................................................................... 17
Thresholding..................................................................................................................... 19
Batch Values – Quick setup of multiple loggers............................................................... 20
Real-time display.............................................................................................................. 20
Enabling logging............................................................................................................... 21
Auto-ranging sensors ....................................................................................................... 21
Log files ............................................................................................................................ 22
Enhanced features ........................................................................................................... 23
Setup simulation............................................................................................................... 24
Retrieve data......................................................................................................................... 24
File – Saving and loading data ............................................................................................. 25
Opening a previously saved file........................................................................................ 25
Format for the save file..................................................................................................... 25
Saving DAT and HEX files................................................................................................ 25

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Save screen segment to file............................................................................................. 26
Screen capture ................................................................................................................. 26
Save a MATLAB file, Read a MATLAB file and Format for the MATLAB save file.......... 26
Logger functions ................................................................................................................... 27
Fetch live readings ........................................................................................................... 27
GPS test ........................................................................................................................... 28
Set default baudrate......................................................................................................... 28
Engineering units.............................................................................................................. 28
Sampling LED control....................................................................................................... 29
View/load a meta table..................................................................................................... 29
Run configuration script.................................................................................................... 29
Configuration – Configuring the operating software............................................................. 30
Derived units..................................................................................................................... 30
COM settings....................................................................................................................32
Real-time limits................................................................................................................. 32
Language resources......................................................................................................... 32
Allow multiple copies........................................................................................................ 33
Show range changes........................................................................................................ 33
Calibration functions ............................................................................................................. 34
View/Enter Calibration Coefficients.................................................................................. 34
Calibration History ............................................................................................................ 34
View Statistics/Two-point calibration................................................................................ 35
Using the graphical display................................................................................................... 37
Displaying only selected channels ................................................................................... 37
Finding the value of individual data points ....................................................................... 37
Plotting against a particular channel ................................................................................ 38
Vertical axis units.............................................................................................................. 38
Zooming............................................................................................................................ 38
Auto-ranging display......................................................................................................... 39
Wave display ....................................................................................................................40
MATLAB interface................................................................................................................. 41
Other manuals ...................................................................................................................... 43
The MS-310 Micro-Salinometer User’s Manual ............................................................... 43
OEM User’s Guide............................................................................................................ 43
Oxyguard Dissolved Oxygen Probe................................................................................. 43
Seapoint Chlorophyll Fluorometer.................................................................................... 43
Seapoint Turbidity Meter .................................................................................................. 43
Appendix A – Battery life calculation........................................................................................ 44
When to replace the batteries................................................................................................... 44
Predicting battery life................................................................................................................. 44
Appendix B – O-ring specifications........................................................................................... 45

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About this Manual
This manual provides instructions for the proper use and care of all submersible
data loggers manufactured by RBR Ltd. It contains operating instructions for field
deployment and use of the operating software for programming and data
recovery.
This manual is divided into three main sections:
1. A "Basic operating instructions" section containing instructions for opening
the logger, changing the battery, etc.
2. A "Software" section covering all aspects of RBR's data logger operating
software.
3. Appendices containing information about battery life expectancy and O-
ring specifications.
This manual is distributed on mini-CD with each logger, and can also be found
online at our website (www.rbr-global.com).

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Warranty Statement
All data loggers manufactured by RBR Ltd. since September 2002, are warranted
against defects in workmanship or original parts and materials for life.
Units suffering from such defects will be repaired or replaced at the discretion of
RBR Ltd., provided that the problem has appeared during normal use of the
instrument for the purpose intended by us. The liability of RBR Ltd. extends only
to the replacement cost of the instrument. The customer will bear all costs of
shipment to us for repair; all other costs, including return shipment, will be borne
by RBR Ltd.
This warranty does not cover consumables or normal wear and tear, nor does it
cover damage caused by negligent use or mishandling. Attempted modification
or repair of any unit without the prior consent of RBR Ltd. will immediately void
any warranty in force.
Users are expected to maintain a regular program of calibration. Equipment,
such as sensors made by other companies, is warranted only to the extent
provided by the original manufacturers.
We reserve the right to grant or refuse warranty repairs at our discretion if we
consider that there are reasonable grounds for doing so.

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Basic operating instructions
Introduction
This section of the manual covers the basic operation of RBR's submersible data
loggers: changing the battery, inspecting and replacing O-rings, etc. Please see
the Software section of this manual for instructions relating to logger
programming and data retrieval. This manual can also be found on the
distribution CD and on RBR's website (www.rbr-global.com).
Opening and closing the logger
1050 and 2050 series loggers
To open the TR-1050, DR-1050 or any of the 2050 family of
loggers, unscrew the sensor end counter-clockwise. The end
cap does not unscrew completely until the O-ring is clear of
its mating surface in the body. This ensures that it will not
eject at high speed should the interior of the logger become
pressurised.
Carefully draw the end cap away from the body, sliding the
attached inner assembly out of the case.
XR loggers XR series loggers have two end caps: the sensor end cap
houses the sensors, and the battery end cap covers the data
port and battery carousel. Plastic loggers have a 6mm
mooring line hole through the battery end cap. Titanium
versions have a larger mooring line hole through a cylindrical
protrusion out of the battery end cap.
Access to the data port and the battery carousel is gained by
removing the end cap opposite the sensor end of the logger.
It may be unscrewed by hand or by using a rod inserted into
the mooring line hole for leverage. The end cap does not
unscrew completely until the O-ring is clear of its mating
surface in the body. This ensures that it will not eject at high
speed should the interior of the logger become pressurized.
Note: Do not touch the circuit boards; moisture or even fingerprints
can affect the accuracy of the logger. The exposed logger should be
held by its sides.

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The battery carousel is fastened to the assembly by a bolt
through its centre. The carousel may be removed by twisting
the bolt counter-clockwise until it is free.
Access to the inner assembly may be obtained by
unscrewing the sensor end cap. Both the battery end cap
and the battery carousel must be removed prior to
unscrewing the sensor end cap. Damage to the back
plane will result if the wrong end of the logger is opened first.
Closing the logger is exactly the reverse of opening it. Remember to keep the
O-rings clean and avoid scratching the O-ring mating surfaces. Carefully
inspect the O-rings, as described in the Inspecting the O-rings section (p.9),
before deploying the logger. Do not use excessive force when tightening the
end cap; hand-tight is quite sufficient, as the seal depends upon the O-rings, not
the end cap tightness.
TR-1060 loggers
To open the TR-1060 loggers, turn the logger counter-clockwise from the middle
(Warning: do NOT try to open the logger from the sensor end, which will break the circuit
card). When the logger is disassembled, handle only the logger case. The logger case
does not unscrew completely until the O-ring is clear of its mating surface in the
body. This ensures that it will not eject at high speed should the interior of the
logger become pressurised. Carefully slide out the half logger case with the inner
assembly and battery holder.
Changing the batteries
For a discussion of battery life expectancy, please refer to “Appendix A –
Battery lifetime calculation (p.44).”
RBR data loggers are powered by 2/3A size 3V lithium cells. These are standard
camera batteries, and may be obtained from retail photographic or hardware
outlets (see the following chart for model numbers).
Note: Do NOT turn the TR-1060 logger from the sensor end, which
will break the circuit board.

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Energizer Kodak IEC Procell Duracell Rayovac Panasonic Varta
EL123A K123LA CR17345 PL123A DL123A RL123A CR123A CR123A
Before changing the batteries, ensure that the logger is not sampling and leave it
idle for at least one minute after disconnecting it from the computer. This will
ensure that it has entered its standby state and its operation will not be disturbed
by removing the old batteries.
1050 and 2050 series loggers
To remove the batteries, first open the logger. The batteries
are held within their casing by the force of a single spring.
Press firmly upon the negative end of the battery furthest
from the spring and pull it out of the casing.
XR loggers To remove the batteries, first open the logger and remove
the battery carousel. The batteries can easily be slid out of
the carousel.
When inserting new batteries, ensure that they are correctly
oriented; the yellow "+" markings at the end of the battery
carousel indicate the direction towards which the positive
terminal of the battery should be placed. The logger will not
work if the batteries have been inserted improperly.
TR-1060 loggers To remove the battery, first open the logger. The battery is
held within its casing by the force of a single spring. Press
firmly upon the negative end of the battery farthest from the
spring and pull it out of the casing.
When inserting a new battery, ensure that it is correctly
oriented. The positive terminal of the battery should be
placed toward the spring; the "+" marking on the bottom of
Important: RBR data loggers do not have a backup battery. If the
logger has entered its standby state, the clock can run for
approximately two minutes without batteries; however, it will almost
certainly lose a significant amount of time. It is also quite possible
that the clock will reset. We strongly suggest that the logger be
programmed after the batteries have been changed.

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the battery carousel indicates this direction. The logger will
not work if the batteries have been inserted improperly.
Communicating with the logger
1050/2050 and XR series loggers
Using the internal data port
To establish a link between the
logger and a PC, open the logger
and locate the RJ-11 jack
mounted at the end opposite the
sensor(s). The supplied RS232
cable has two sizes of plugs. The
narrower plug goes into the
logger. The other plug fits into the serial port adapter,
which then should be plugged into a 9 pin serial port
on your PC.
If your computer does not have an available serial port, but
does have a USB port, a serial to USB adapter may be
used. Simply fit the serial connector into the serial to USB
adapter and plug the adapter into the USB port on the PC.
Please note that the USB adapter's drivers must be installed
before it will work. When this installation is complete, the
correct COM port must then be chosen in COM settings in
the logger operating software. Refer to page 32 for more
details.
Using an underwater connector
Some loggers are equipped with an Impulse MSSJ series underwater
connector. This connector makes it possible to program and retrieve data from
the logger while it is underwater. Please refer to the Real-time display section
of the manual (p.20) for more information about live data collection.
An optional RS485 interface allows for use of cables over 1km long.
To establish a connection, press the cable plug into the bulkhead receptacle and
tighten the stainless steel connector. Please see the note below for precautions
regarding the O-rings. O-ring specifications may be found in Appendix B (p.45).
Note: Although the
supplied cable looks
very much like a phone
cable, it is not. A normal
telephone jack and
handset cable cannot be
used for communication
between the logger and
host PC.

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Recent loggers are equipped with IE55 connectors and the following guidelines
are provided:
•Lubricate mating surfaces with 3M Silicone Spray or equivalent. DO NOT
GREASE. Connectors must be lubricated on a regular basis.
•IE55-1200 contact surfaces must be dry prior to mating.
•Lubricate O-rings with Dow Corning #111 Valve
Lubricant or equivalent.
•Keep O-ring grooves clean and avoid cuts and nicks
in the O-ring. Replace O-rings when re-mounting
connectors.
•Avoid contact with solvents.
•Avoid sharp bends at cable entry to connector.
•Elastomers can be seriously degraded if exposed to direct sunlight or high
ozone levels for extended periods of time.
Using an RF modem
XR series loggers may be connected to an RF modem, making it possible to
program the logger remotely and to view and save data as it is collected.
The COM settings portion of the Software guide (p.32) has configuration
instructions for the RF modem. The Real-time display section (p.20) has more
details about live data collection.
Note:
The seal for the underwater connection depends upon two O-
rings: one is attached to the connector and the other to the
bulkhead. There are two common difficulties relating to these O-
rings:
1. If the O-ring on the plug is not well greased, then the
alignment recess can cut the O-ring. Greasing the O-ring
before connecting the plug to the socket will prevent this
from happening.
2. The O-ring at the bottom of the receptacle is easily lost. It
is specially made for Impulse and has a non-standard
size. Replacements may be obtained, but the cost is
nearly five times that of a standard O-ring of similar size.
Do not lose this O-ring. If you do, contact RBR for a
replacement.

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TR-1060 loggers
To establish a link between the logger and a PC, open the
logger and locate the data port mounted in the middle part of
the inner assembly adjacent to the battery holder. The
supplied RS232 cable has two sizes of plugs. The narrower
plug goes into the logger connector. The other plug fits into
the 9-pin serial port on your PC.
If your computer does not have an available serial port, but
does have a USB port, a serial to USB adapter may be used.
Simply fit the serial connector end into the serial to USB
adapter and plug the adapter into the USB port on the PC.
Please note that the USB adapter's drivers must be installed
before it will work. When this installation is complete, the
correct COM port must then be chosen in COM settings in
the logger operating software. Refer to page 32 for more
details.
Deployment
Once you have ensured that the batteries are fresh, inspected the O-rings and
programmed the logger (see Software operation (p.13) for programming
instructions), the instrument is ready to be deployed. There are three
precautions you should take to avoid damaging the logger:
1. Heed the maximum pressure rating. All RBR loggers with pressure
sensors are individually rated to a maximum depth/pressure. This is
indicated by the label which is placed on the logger’s sensor end cap.
Loggers which do not have a pressure sensor do not have this label, but
are limited by the maximum depth/pressure rating of either the logger
housing itself or of the sensors.
2. Avoid physical stress to the logger. Any type of clamp or bracket which
introduces pointed stress to the logger body is not recommended for use
in logger mooring, mounting, and/or other deployment. Stress due to
improper mounting may cause the logger to leak, resulting in the loss of
valuable data or permanent damage to the electronics. RBR can provide
proper mooring and mounting clamps suited to your specific application.
3. Use desiccant when necessary. If the logger is closed up in a hotter,
more humid environment than the deployment environment, internal
condensation can result. Since condensation may cause the circuitry to
malfunction, it is advised under these circumstances that you contact RBR
for an application specific solution; this may involve the installation of
desiccant prior to deployment.

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Maintenance and repairs
Support kits
To simplify maintenance of your data logger, RBR sells Support kits with
enough O-rings, and silicone grease for 5 deployments. Please contact RBR for
more information or to place an order.
O-rings
The single most important item of maintenance on any RBR submersible data
logger is care of the O-rings. Any kind of water leak can damage the circuitry
beyond repair and cause complete data loss. Every logger's seal depends
upon its O-rings, not the end cap tightness. Proper O-ring maintenance,
therefore, is crucial.
Please see Appendix B (p.45) for O-ring specifications for each logger.
Inspecting O-rings
O-rings must be undamaged and the mating surfaces free from particles of grit,
hair or small scratches in order to preserve a seal. Before deploying the logger,
carefully inspect the O-rings that are required to maintain a seal. 1050/2050
series loggers depend upon one O-ring in the end cap. The plastic XR series of
loggers have one O-ring for each end cap and two for each detachable sensor.
Titanium versions of the XR series loggers have a backup ring in each end cap
as well. TR-1060 loggers have one O-ring seated in the middle part of the logger
case.
O-ring on 1050/2050 and XR loggers O-ring on TR-1060 loggers
Important: O-rings may lose elasticity over time due to pressure,
even when the logger is not deployed. We strongly suggest that
the O-rings be replaced regularly, e.g. before every deployment,
or after change of batteries, or at least once a year.

10
Give particular attention to the following areas:
•The surface of the O-ring itself
•The mating surface on the inside of the case between the threads and the
open end
•The inner surfaces of the groove in the end cap where the O-ring sits
•The mating surfaces for each removable sensor
•The underwater connector for external power or data transfer (if used)
Any dirt present should be removed by wiping thoroughly
with a soft, lint-free cloth. When cleaning, never use any
material or tool which could scratch the O-ring or any of its
mating surfaces. If any dirt is present in the O-ring groove,
then the O-ring should be removed as described below to
allow thorough cleaning of the groove. If an O-ring needs to
be removed for any reason, it should be replaced.
If the O-ring is scratched, cut, distorted, perished or
defective in any other way it must be replaced. If any of the
surfaces of the O-ring groove are scratched, pitted or
otherwise damaged, the logger may need to be returned to
RBR for refurbishment: please contact us for advice.
Replacing an O-ring
1) Lever the O-ring from its groove. Use a soft plastic or wood tool; do not
use a metal screwdriver or any other tool which may scratch the
surfaces of the O-ring groove: doing so will probably render the end cap
useless. Slide the O-ring out of its groove and off the logger. The O-ring
may need to stretch quite a bit as it is pushed off; this requires some effort
but can be done by hand.
2) Thoroughly clean the O-ring groove, taking great care not to scratch or
damage it in any way. Inspect it carefully, and contact us for advice if it
appears damaged. Apply a light film of silicone grease to all three inside
surfaces of the groove, being careful not to trap any dirt, hairs or lint.
3) Select the proper O-ring (consult Appendix B (p.45) for O-ring sizes) and
make sure it is not damaged. Lubricate it with a very light film of silicone
grease to ease its installation.
4) Install the new O-ring by pushing it into place and popping it into its
groove. The O-ring may need to stretch quite a bit as it is pushed on; this
requires some effort but can be done by hand.
5) When the new O-ring is in place, inspect it once more for scratches and
dirt, and wipe away any silicone grease deposited on the end cap.
Most experienced users of oceanographic equipment replace all O-rings before
every deployment as a matter or routine. The cost of an O-ring is negligible

11
compared with the cost of the instrument and its deployment. Routine
replacement of O-rings, therefore, is cheap insurance.
Drying agent
If the logger is closed up in a hotter, more humid environment than the
deployment environment and then plunged into cold water, internal condensation
can result. Since condensation may cause the circuitry to malfunction, it is
advised in such circumstances that, after the logger is set up and before it is
closed for deployment, a small pack of desiccant be placed on the battery side of
the circuit board above the battery mount.
A desiccant plastic “pocket” should be installed before adding a desi-pack. The
pocket is an L-shaped piece of plastic designed to keep any moisture absorbed
by the desi-pack off the electronics.
If your application requires desiccant, please contact RBR for more information.
Repairs
We support all instruments and software that we manufacture. First line support
is always available by phone, fax or e-mail. Please contact us immediately if you
are experiencing problems with your RBR product. It is very important to contact
us before returning your instrument, as some difficulties can be easily solved on-
site by the user. Please have the model and serial number of the unit handy
when you contact us.
There are no user-repairable parts of the logger. Any attempt at repair, whether
successful or not, without prior authorization from RBR Ltd. will void the warranty.
If it is necessary to return the product to RBR for an upgrade, repair, or
calibration; please review the detailed shipping information on our website before
returning the unit.
Calibration
We recommend that you verify the calibration of your data logger before any
critical deployment, periodically once a year, or if you suspect the calibration to
be out of specifications. Discuss your calibration needs with RBR. In some
cases, you will be recommended to return the instrument to RBR to have it
checked and re-calibrated. Please contact us for our current calibration fees.
XR series
1050 & 2050 series TR-1060 loggers

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Software
Introduction
The program rbrVwXX.exe (“V” and “XX” stand for the software version) is
Windows® 98/NT/2000/XP compatible operating software designed to provide a
user-friendly interface with the logger. With this program one may setup the
logger, retrieve data, set calibration coefficients, select optional derived units for
viewing and file saving, preview the data graphically, and save the data to a file.
The logger operating software is available from two sources: it is provided on
mini CD with the original purchase of the logger and the latest version is
available on the RBR web site.
Software installation and removal
Installing the software
1. Place the CD-ROM in the appropriate computer drive. The InstallShield
program should start automatically. If the installation fails to begin
automatically, run the setup file from the CD-ROM directly. It is located in
the root directory of the CD-ROM (e.g. “E:\”). The installation program is
labeled setup_rbrVwXX.exe, where 'V' and 'XX' represent the software
version.
2. InstallShield allows you to decide on the name and placement of the
working directory for the software; the default is “C:\Program files\rbr”. In
this directory, four further directories (“dat”, “hex”, "Manual" and
“MATLAB”) are created and loaded with a sample data file and the user
manuals. Shortcuts to the program and the user manual are placed on
the Desktop and in the Programs section of the Start menu.
3. RBR Logger Software may then be run via the Desktop shortcut or from
the shortcut in the Programs section of the Start menu.
Uninstalling the software
The software may be removed by running the 'Uninstall' utility located in the RBR
folder in the Programs section of the Start menu, or by using the Add/Remove
utility in the Control Panel. The uninstall utility will not delete any saved data
files.
Upgrading the software
The most recent version of the logger operating software is available on the RBR
website (http://www.rbr-global.com/software.htm). If a newer version is available,

13
we recommend that you upgrade by uninstalling your existing version and
installing the newer one.
Software operation
Main window layout
The main window of the data logger operating software has seven menus:
Setup, Retrieve data, File, Logger functions, Configuration, Calibration
functions, Micro-Salinometer and Exit. The clock on the bottom right-hand
corner indicates the time according to the PC clock. The status of logger to PC
communication is indicated on the bottom, left-hand corner of the window.
The main window showing the menu items and the status bar.

14
Setup – Configuring the logger
Configuring the logger prior to
deployment is simple and can be
done using the Setup window. All
logger programming is accomplished
through this interface with the
exception of setting the calibration
coefficients. The Essential
features window is shown here
displaying the logger time, start and
end times, and the sampling period.
The figure on the following page
shows the setup window expanded
to display all the Advanced
features. This window is displayed
when the particular logger has one
or more of the advanced features of
Autorun, Thresholding, Averaging
and Real-time Display.
The ‘Essential features’ Setup window.
The complete Setup window showing the ‘Essential features’ and the ‘Advanced features’.

15
Setting the clock - Sync to PC
The logger clock may be synchronized with the host PC by pressing the Sync to
PC button (confirm PC clock first).
Start of logging, End of logging, Sampling period and Averaging
period
All of these parameters may be set in the Date and time picker window which
will open after clicking one of these buttons. The parameters will be set into the
logger when the Enable logging button is pressed.
The Date and time picker window:
The current date is circled in red and the target date is highlighted in blue.
The Start time date and time picker may be ignored by clicking on Now. If Now
is selected, the Start time calendar is hidden and the logger will start within 10 to
20 seconds of being enabled.
The minimum Sample period for the DR-1050, TR-1050/1060, 2050 family and
XR-420 series of loggers is 1 sample/second. The XR-620 series, however, is
capable of sampling at a rate of 6 Hz.
At the bottom left of the dialog box is the logger capacity calculation. The
memory usage and the battery usage of the proposed deployment are shown.
The battery usage is based on a de-rated battery capacity from the nominal
1300mAH to 1000mAH. The battery usage is offered as a guide, further derating
may be necessary for operation in cold conditions. See the section on Setup
simulation (p.24) for a way to calculate battery usage for any particular
deployment as well as Appendix A (p.44) for more information. If the RS485
serial protocol is employed, an additional drain is imposed on the battery. If the
RBR Windows Software considers that your logger may be using RS485, an
additional battery usage value will appear in the window.

16
Certain loggers have an Averaging function. Averaging may be enabled by
checking the Enable averaging box in the Date and time picker window. If
averaging is selected, the user must choose an averaging period that is less than
the sampling period.
When averaging, the XR-420 and XR-620
loggers take samples at a rate of 6Hz over the
averaging period and records the average.
Thus, if the user specifies 5 seconds of
averaging, 5 seconds of 6Hz samples are taken
(30 samples), and averaged into one reading. The TGR-1050HT and TGR-2050
loggers take samples at 4Hz. The TWR-2050 and TWR-2050HT loggers collect
samples at the rate set in the configuration window specific to these loggers
(p.17). All channels are independently averaged. The operating software will
cross check the averaging settings with the time taken to read the samples and
with the defined sampling rate. Any inconsistencies will be indicated to the user.
Note: This is not to be confused
with the pure 6Hz sampling of
the XR-620 series loggers.

17
Setup for the TWR-2050 logger
The setup of TWR-2050 loggers is slightly more complex, however, the RBR
Windows Software produces similar windows that include the added parameters
as follows:
The TWR Setup screen replaces the ‘Sampling period’ information with the four
parameters: Sampling period for tide, Rate for both tide and Wave Data,
Averaging period for Tide and Wave settings. Clicking on any of their related
buttons moves the user to the TWR Tide and Wave modes configuration
window.
Sample period for Tide defines the interval for collecting tide data. A tide
sample consists of a temperature
reading and an averaged pressure
reading which has been averaged
over the Averaging time for Tide.
The Rate for both Tide and Wave
Data defines the sampling rate for
pressure samples used in the tide
averages and in the wave bursts.
The Wave settings define both the
number of samples to be taken in a
wave burst and the interval for
collecting wave bursts.
In the example screen shown,
averaged tide samples are to be
taken every ten minutes, wave
bursts of 512 samples are to be
taken every 30 minutes, and the
samples are captured at a rate of
4Hz. For 512 samples this means
that the burst will take 512/4
seconds = 2 min 8 sec. The tide
averaging of 1 minute will average
240 readings. (1 minute = 60
seconds @ 4 readings per second).
TWR Setup window