HOBO U24 Conductivity Logger Manual
3
onsetcomp.com
•
The logger can record two types of data: samples and events. Samples are the sensor measurements recorded at
each logging interval. 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.
Communication
To connect the logger to a computer, use either the Optic USB Base Station (BASE-U-4) or HOBO Waterproof Shuttle
(U-DTW-1) with a coupler (COUPLER2-C). To launch and read out the logger in the field, use one of these methods:
•
Laptop computer with Optic USB Base Station (BASE-U-4) and a coupler (COUPLER2-C)
•
HOBO Waterproof Shuttle (U-DTW-1) and a coupler (COUPLER2-C)
•
HOBO U-Shuttle (U-DT-1, Firmware Version 1.12m030 or later) with Optic USB Base Station and coupler (COUPLER2-C)
The optical interface allows the logger to be offloaded without breaking the integrity of the seals. The USB compatibility
allows for easy setup and fast downloads.
IMPORTANT
: USB communications may not function properly at temperatures below 0°C (32°F) or above 50°C (122°F).
Connecting the Logger to a Computer or Waterproof Shuttle
1.
Follow the instructions that came with your base station or Waterproof Shuttle to attach it to a USB port on the
computer.
2.
Attach the coupler to the base station or shuttle.
3.
Wipe off any residue or slime from the area of the
logger that will go into the coupler, including the
communication window. This will help the logger slide
in and out of the coupler more easily, and help with
communication.
4.
Insert the logger into the coupler, aligning the
bump/arrow on the coupler with the arrow on the
logger. Be sure that it is properly seated in the
coupler. If the logger has never been connected to the
computer before, it may take a few seconds for the
new hardware to be detected by the computer.
NOTE
: If you are using the HOBO Waterproof Shuttle as a base station with a computer, briefly press the Coupler
Lever to put the shuttle into base station mode.
WARNING
: Do not leave the logger in the coupler for extended periods of time. When connected to a coupler, the logger is
“awake” and consumes significantly more power than when it is disconnected and considered “asleep.” Always remove the
logger from the Optic Base Station or HOBO Waterproof Shuttle as soon as possible after launching, reading out, or
checking the status to avoid draining the battery.
Launching the logger
Before deploying the logger in the field, perform the following steps in the office:
1.
Start HOBOware.
2.
Connect the logger to the computer as described in the previous section.
3.
Verify the status. Click the status button on the toolbar and observe that the temperature is near the actual
temperature.
4.
Launch the logger with the correct range. Refer to the specifications on page 1 for both calibrated and extended
ranges (the calibrated ranges are also printed on the logger housing). The logger will not record readings outside of
the extended range selected. (For the U24-002, readings below the extended range are reported as 0.) If in doubt
