Hobo UX100-023A, Manual, Page: 2 / 7

HOBO External Temp/RH Data Logger (UX100 ‐ 023A) Manual
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Specifications (continued)
Plot A: Time Accuracy
Logger Components and Operation
Start/Stop Button: Press this button for 3 seconds to start or
stop logging data, or to resume logging on the next even
logging interval. This requires configuring the logger in
HOBOware with a push button start or stop, and with “Resume
logging on next button push” selected (see Setting up the
Logger ). You can also press this button for 1 second to record
an internal event (see Recording Internal Logger Events ) or to
turn the LCD screen on if the option to turn off the LCD has
been enabled (see Setting up the Logger ).
Battery Tray: Remove the battery tray on the top of the logger
to access the logger battery (see Battery Information ).
Alarm/Stats Button : Use this button to clear a tripped alarm
(see Setting up Alarms ) or to switch between statistics, alarm
readings, and the current sensor readings.
Mounting Loops: Use the two mounting loops to mount the
logger with the hook ‐ and ‐ loop strap (see Mounting the Logger ).
External Temp/RH Sensor: The external temperature and RH
sensors are at the end of the sensor cable, which is attached to
logger.
USB Port: Use this port to connect the logger to the computer
or the HOBO U ‐ Shuttle via USB cable (see Setting up the Logger
and Reading Out the Logger ).
LCD Screen: This logger is equipped with an LCD screen that
displays details about the current status. This example shows all
symbols illuminated on the LCD screen followed by definitions
of each symbol in the table below.
LCD Symbol Description
The logger is waiting to be launched. Press and
hold the Start/Stop button for 3 seconds to launch
the logger.
The logger has been launched with a push button
stop enabled; press and hold the Start/Stop
button for 3 seconds to stop the logger. Note : If
you also launched the logger with a push button
start, this symbol will not appear on the display for
30 seconds.
The battery indicator shows the approximate
battery power remaining.
The logger has been configured to stop logging
when memory fills. The memory bar indicates the
approximate space remaining in the logger to
record data. When first launched, all five segments
in the bar will be empty. In this example, the
logger memory is almost full (only one segment in
the memory bar is empty).
The logger has been configured to never stop
logging (wrapping). The logger will continue
recording data indefinitely, with newest data
overwriting the oldest data. When first launched,
all five segments in the memory bar will be empty.
In this example, the memory is full (all five
segments are filled in) and new data is now
overwriting the oldest data. This will continue until
the logger is stopped or the battery runs out.
The logger is currently logging.
A sensor reading is above or below the high or low
alarm that you configured. Press and release the
Alarm/Stats button until the “alm” symbol
(described below) is displayed on the screen. This
symbol at left will clear depending on how alarms
were configured in HOBOware. If the alarm was
configured to clear when the logger is relaunched,
this symbol will remain on the LCD. Otherwise, it
will clear when the sensor reading is back within
the alarm limits or by pressing the Alarm/Stats
button for 3 seconds.
An alarm is ready to be cleared. This will only
appear if “Cleared with button press” was selected
in the HOBOware alarm settings. Press the
Alarm/Stats button for 3 seconds to clear the
alarm.
These symbols show the maximum, minimum,
average, and standard deviation values most
recently calculated for the logger (if the logging
mode has been set to Statistics in HOBOware).
Press the Alarm/Stats button for 1 second to cycle
through each of the available statistics and then
back to the current sensor reading (or to the alarm
value if applicable).
This is the sensor reading that tripped the alarm.
Press the Alarm/Stats button to view this reading.
Press the Alarm/Stats button again to cycle
through any statistics (defined above) and
ultimately back to the current sensor reading.
Alarm/Stats Button
Start/Stop Button
USB Port
Mounting
Loop
Battery Tray
Mounting
Loop
LCD Screen
External Temp/RH Sensor Cable