HOBO U30 Station (NRC) User’s Guide
51
Chapter Six:
Troubleshooting
This chapter includes the following topics:
•
LED Descriptions - page 51
•
Problems and Solutions - page 53
LED Descriptions
The indicator LEDs can provide helpful clues as to what the HOBO U30
Station is doing, especially when it is not behaving as expected.
The following table defines LED indications.
Indicator LED
Action
What it means
Logging Blinking
green
Indicates the system is currently
logging. It blinks every two seconds
while the logger is recording data
from sensors. Do not add sensors
while this indicator is blinking
unless you plan to relaunch.
If this indicator is not blinking when
you believe it should, make sure the
HOBO U30 Station has been
launched.
Blinking
red
There was a Smart Sensor or
Analog Sensor Port communication
failure. Investigate this problem
immediately. Look for a loose
connection, which could cause bad
electrical contact with a sensor. If
found, remove the offending sensor
and check its wires and connector
for damage and/or signs of
moisture.
Blinking
orange
There was a communication failure,
52
HOBO U30 Station (NRC) User’s Guide
Indicator LED
Action
What it means
but the system has recovered. There
may be an intermittent problem. Try
checking the Smart Sensors one at a
time to make sure they are all
communicating. If you find a bad
sensor, or if no sensor
communicates, contact your Onset
Authorized Dealer or Onset
Technical Support.
Sensor Active
Blinking
Smart Sensor network
communications are occurring.
USB
Communication
Blinking
There is active communication from
the HOBO U30 Station to the
computer.
Analog Sensor
Port: Active
Blinking green
The Analog Sensor Port is making a
measurement.
Analog Sensor
Port: 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.