Chapter 5: Diagnostics and Troubleshooting
HOBO U30 Remote Monitoring System User’s Guide
51
Indicator LED
Action
What it means
Blue double-
blink with long
pause followed
by a blue
double-blink
A connection was made to the
HOBOlink.com server.
Miscellaneous
blink patterns
Various causes. Contact your Onset
Authorized Dealer or Onset Technical
Support if the pattern is persistent.
Active Blinking
green
The Analog Sensor Port is making a
measurement.
Ex. On
Blinking orange
Excitation has been turned on for the
Analog Sensor Port.
Tip:
The indicators are very faint under direct sunlight. If no indicators
appear to be blinking, shield the logger from the light and check the
indicators again.
Chapter 5: Diagnostics and Troubleshooting
52
HOBO U30 Remote Monitoring System User’s Guide
Problems and solutions
The following chart lists common problems you may encounter with the
HOBO U30 Station and solutions.
Problem Solution
No status
indicators are
blinking
The indicators are very faint under direct sunlight. If
no indicators appear to be blinking, shield the logger
from the light and check the indicators again.
Check the status in HOBOlink.com or with
HOBOware Pro. Make sure the battery power is not
too low. There needs to be at least 3.5 volts for
logging to continue and 3.9 volts for GSM
communication.
The memory may be full. Read out the logger and
relaunch. You may also want to enable Wrap Around
When Full so that the HOBO U30 Station can
continuously log and transmit data. See the
Launching section on page 26 for more information
on Wrap Around When Full.
The logger may not have been launched.
You need to stop
logging
Connect to the HOBO U30 Station to a USB cable and
stop logging with HOBOware Pro. Or, unplug the solar
panel or AC adapter and then unplug the battery.
IMPORTANT: Damage can occur to the HOBO U30
Station if the battery is unplugged before the solar panel
or AC adapter is disconnected. You will need to select
“Force Relaunch on Next Connection” under Launch
Configuration in HOBOlink.com to resume logging again.
You need to stop
logging and
remote
communications.
Unplug the solar panel or AC adapter and then
disconnect the battery. IMPORTANT: Damage can occur
to the HOBO U30 Station if the battery is unplugged
before the solar panel or AC adapter is disconnected.
I made a change
to the Launch or
Readout
Configurations,
but it hasn’t
taken place
Any changes you make to the Launch or Readout
Configurations will not take effect until the next time the
HOBO U30 Station connects to the HOBOlink.com. If
your connection interval was set to 2 hours, then
changes won’t take effect until the next connection on
that 2-hour schedule.
