Hobo International PENDANT G UA-004-64 - Manual (Page 2)

HOBO Pendant G Acceleration Data Logger
2
Connecting the logger
The HOBO Pendant G logger requires HOBOware Pro or
HOBOware Lite, and either of the following to connect to the
computer:
• Pendant Optic USB Base Station & Coupler (part # BASE-U-1)
OR
• Optic USB Base Station (part # BASE-U-4) or HOBO Waterproof
Shuttle (part # U-DTW-1); coupler (part # COUPLER2-A)
If possible, avoid connecting at temperatures below 0°C (32°F) or
above 50°C (122°F).
1. Plug the USB connector on the base station into an available USB
port on your computer.
2. Insert the logger and the base station into the coupler, as shown in
the following diagrams.
For BASE-U-1, make sure that the logger is inserted in the end of
the coupler that has the magnet, and that the ridges on the base
station and logger are aligned with the grooves in the coupler.
For BASE-U-4 or the HOBO Waterproof Shuttle, firmly insert
the optical end of the base station into the D-shaped end of the
coupler, and make sure that the ridge on the logger is aligned with
the groove in the coupler.
3. If you are using the HOBO Waterproof Shuttle, briefly press the
coupler lever to put the shuttle into base station mode.
4. If the logger has never been connected to the computer before, it
may take a few seconds for the new hardware to be detected.
5. Use the logger software to set up the alarms, launch, and read out
the logger.
You can read out the logger or check its status while it continues to
log (in Normal logging mode only); stop it manually with the
software; or let it record data until the memory is full. Refer to the
software user’s guide for complete details on launching, reading out,
and viewing data from the logger.
Triggered start
This logger can be configured to start at your command, using the
magnet in the coupler to trigger a start. (To log in Fast mode, this is
the only way to launch the logger.)
1. Use the logger software to launch the logger with Trigger Start
selected. Remove the logger from the coupler.
2. Bring the logger and an empty coupler or strong magnet to the
deployment location.
Important: Any magnet can trigger a start. This can be
helpful, but it can also cause a premature start. Keep the
logger away from strong magnetic fields until you are ready
to begin logging.
3. When you are ready for the logger to start logging, insert the
logger into the empty coupler (or place it next to a strong magnet)
and remove it after three seconds. Important: The logger will
not launch if the base station is in the coupler.
4. Verify that the logger’s light is blinking at least every four
seconds.
Sample and event logging
While logging in Normal mode, the logger can record two types of
data: samples and internal logger events. Samples are the
measurements recorded at each logging interval (for example, x-axis
acceleration every minute). Events are independent occurrences
triggered by a logger activity, such as Bad Battery or Host
Connected. Events help you determine what was happening while the
logger was logging.
Events are not logged in Fast mode.
Normal vs. Fast logging modes
When you launch the logger, you can choose between Normal mode
and Fast mode. In Normal mode, the logger’s fastest logging interval
is once per second. Normal mode is ideal for applications involving
tilt, activity, and inclination. These applications do not require
information about the dynamics of the acceleration events, but rely
more on the static acceleration of gravity.
Fast mode allows logging intervals between 0.01 and 0.99 seconds
(100 to 1.01 Hz), making it ideal for applications involving vibration
and shock. These applications are more concerned with the dynamics
of the acceleration events over short periods, and would not be
captured in Normal mode. Important: Connecting the logger to the
computer (or a shuttle) when logging in Fast mode will stop the
logger.
The logger’s memory can store roughly 60,000 measurements. The
time required to fill this memory depends on how many channels and
events are being logged, as well as the logging interval. For example,
if you log x-, y-, and z-axis acceleration at 100 Hz, the logger’s
memory will fill up in less than four minutes. An estimated duration,
based on the logging interval and channels you select, is displayed on
the Launch window in HOBOware.
LOGGER
COUPLER2-A
To BASE-U-4 or
HOBO Waterproof Shuttle
Coupler lever (for use with
HOBO Waterproof Shuttle)
Ridge side down
LOGGER
Magnet
BASE-U-1 & COUPLER
Ridge