Onset U-DTW-1 Operating Manual

HOBO® Waterproof Shuttle (U-DTW-1) Manual

The HOBO Waterproof Shuttle performs several major functions:

• Reads out all logger information (serial number, deployment number, data, etc.) from

loggers in the field for transfer to host computer, and stores each logger’s data in a
“bank”

• Nonvolatile memory preserves data, even if batteries are depleted

• Relaunches the logger, resetting the logger’s time to the shuttle’s time and

synchronizing the logging interval on relaunch

• Can be used as an optic-to-USB base station

• Can be used to read out and relaunch loggers underwater

Although the HOBO Waterproof Shuttle is easy to use, Onset strongly recommends that you
spend a few minutes reading this manual and trying out the procedures described here before
taking the shuttle into the field.

Specifications

HOBO Waterproof Shuttle

U-DTW-1

Included Items:

• USB cable

• Set of couplers;

 For UA Pendant

(COUPLER2-A)

 For U20 Water Level

(COUPLER2-B)

 For U20L Water Level, U22

Water Temp Pro v2, U24
Conductivity, and U26 DO
(COUPLER2-C)

 For UTBI TidbiT v2

(COUPLER2-D)

 For U23 HOBO Pro v2

(COUPLER2-E)

Required Items:

• HOBOware Pro 2.2 or later

• Compatible logger and

matching coupler

Compatibility All HOBO U-Series loggers with optic USB. Not compatible with the HOBO

U-Shuttle (U-DT-1).

Data Capacity 63 logger readouts of up to 64K each

Operating Temperature 0° to 50°C (32° to 122°F)

Storage Temperature -20° to 50°C (-4° to 122°F)

Wetted Materials Polycarbonate case, EPDM o-rings and retaining loop

Waterproof To 20 m (66 feet)

Time Accuracy ±1 minute per month at 25°C (77°F); see Plot A

Logger-to-Shuttle Transfer

Reads out one full 64K logger in about 30 seconds

Speed

Shuttle-to-Host Transfer
Speed

Full shuttle offload (4 MB) to host computer in 10 to 20 minutes,
depending on computer

Batteries 2 AA alkaline batteries required for remote operation

Battery Life One year or at least 50 complete memory fills, typical use

Weight 150 g (4 oz)

Dimensions 15.2 x 4.8 cm (6.0 x 1.9 inches)

The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU). To maintain CE compliance, this
product must be used with the supplied USB cable or equivalent (less than
3 m long).

40

20

0

-20

-40

-60

-80

Timebase Error (ppm)

-100

-120

-140

-20 0 20 40 60

Temp erature ( °C)

10264-M MAN-U-DTW-1

Plot A

HOBO Waterproof Shuttle (U-DTW-1) Manual

HOBO Waterproof Shuttle Features

Preparing to Go on Location

Before using the shuttle for the first time, you must launch it
with HOBOware 2.2 or greater. You must also launch any
compatible loggers that were last launched with an earlier
version of HOBOware, or have never been launched at all.

1. Use HOBOware 2.2 or greater to launch each logger you

wish to read out and relaunch with the shuttle later. (Read
“Using the shuttle as a base station” for instructions if you
do not have another base station for the loggers.) The
shuttle cannot relaunch loggers that were last launched
with an earlier version of HOBOware. (You only have to do
this once for each logger.)

2. Plug the large end of a USB interface cable into a USB port

on the computer. (Avoid using a USB hub, if possible.)

3. Unscrew the center cap on the shuttle. If the cap is too tight

to loosen by hand, insert a screwdriver through the lanyard
hole and rotate counterclockwise until the cap is loosened.

4. Plug the small end of the USB interface cable into the USB

port in the shuttle. (If the shuttle has never been connected
to the computer before, it may take a few seconds for the
new hardware to be detected.)

5. Follow the instructions in the HOBOware User’s Guide to

access the Manage Shuttle dialog. Make sure the battery
level is good, and change the batteries now if they are
weak.

7. If you have used the shuttle before, make sure there are

enough banks available to accommodate the loggers you
plan to read out.

8. Disconnect the USB cable from the shuttle and replace the

center cap securely.

Reading Out and Relaunching Loggers
in the Field

After you have ensured that the shuttle’s batteries are good,
there is sufficient memory available, and the shuttle’s clock is
synchronized, follow these steps to read out and relaunch a
logger in the field:

1. Make sure the shuttle’s large cap and center cap are closed

securely. Tighten the center cap until it is just flush with the
large cap, or until the O-ring is no longer visible.

2. Make sure the communication end of the shuttle is clean.

Attach the correct coupler for the logger, and ensure that it
is seated properly.

3. Insert the logger into the coupler, following the instructions

that came with the coupler.

4. Momentarily press the coupler lever (pressing hard enough

so the lever bends).

Important: If you change the batteries in the field, the shuttle’s
clock will stop, and the shuttle will not read out loggers again
until you relaunch it in HOBOware.

6. If you are using the shuttle for the first time, launch the

shuttle as described in the HOBOware User’s Guide.
Launching synchronizes the shuttle’s clock to the host
computer and initializes the shuttle’s header.

Important: The shuttle’s clock is used to set the logger’s clock
at relaunch. For most accurate results, make sure the host
computer’s clock is correct before launching the shuttle. If you
need to adjust the computer’s clock, quit HOBOware, set the
computer’s clock, then reopen HOBOware and launch the
shuttle.

1-800-LOGGERS 2 www.onsetcomp.com

Readout should begin immediately. The amber LED blinks
continuously while readout and relaunch are in progress.
Do not remove the logger when the amber LED is blinking.

5. After reading out the logger, the shuttle synchronizes the

logger’s clock to the shuttle’s internal clock and relaunches
the logger, using the description, channels to log, logging
interval, and other settings that are already in the logger. (If
the logger was launched with multiple logging intervals, the
final defined logging interval will be used.) The logger is