User Manual
HOBO 4-Channel Thermocouple Data Logger (UX120-014M) Manual
1-800-LOGGERS 4 www.onsetcomp.com
data will be recorded at the faster interval, but the sensor
readings will only be updated on the screen every 15
seconds.
• If a thermocouple is disconnected during logging,
erroneous values will display for that sensor on the LCD
and return to normal readings once reconnected. See
Connecting Thermocouple Sensors for more details.
• When the logger has stopped logging, the LCD screen will
remain on until the logger is offloaded to a computer or
HOBO U-Shuttle (unless launched with the “Turn LCD off”
option). Once the logger has been offloaded and
disconnected from the computer, the LCD will turn off
automatically after 2 hours. The LCD will turn back on the
next time the logger is connected to the computer.
Setting up the Logger
Use HOBOware to set up the logger, including setting alarms,
selecting the options to start and stop logging, and choosing a
logging mode.
1. Install the batteries. See Battery information for details.
2. Connect the logger and open the Launch Logger window.
To connect the logger to a computer, use the USB cable
provided. Click the Launch icon on the HOBOware toolbar
or select Launch from the Device menu.
Important: USB 2.0 specifications do not guarantee
operation outside the range of 0°C (32°F) to 50°C (122°F).
3. Select the thermocouple types. Under Configure Sensors to
Log, select all the thermocouple channels that will be
logged and select the correct type of thermocouple for each
one as shown in the following example. Type labels for each
thermocouple if desired.
4. Select the internal 10k thermistor (temperature) channel to
log (optional) and type a label if desired. This internal 10K
thermistor measures ambient temperature and is used for
cold-junction compensation of the thermocouple output.
Important: Cold-junction compensation is always
performed on the thermocouple measurements even if the
internal 10k thermistor (temperature) channel is not
selected for logging.
5. Set up alarms (optional). Click the Alarms button if you
want to configure an alarm to trip when the temperature is
above or below a value you specify. See Setting up Alarms
for details.
6. Configure filters (optional). Click the Filters button to
create additional filtered data series. Any filtered series will
be available automatically upon reading out the logger.
7. Select the Logging Interval. Select a logging interval from 1
second to a maximum of 18 hours, 12 minutes, and 15
seconds.
8. Select the Logging Mode:
• Fixed Interval. In Fixed Interval mode, data will always be
recorded at the regular logging interval set in the
previous step. This is the default setting.
• Burst. In Burst mode, logging will occur at a different
interval when a specified condition is met. See Burst
Logging for more information.
• Statistics. In Statistics mode, maximum, minimum,
average, and standard deviation statistics are calculated
for the temperature during logging, sampling at an
interval you specify. See Statistics for more information.
9. Choose when to start logging:
• Now. Logging begins immediately.
• At Interval. Logging will begin at the next even interval as
determined by the selected logging interval.
• On Date/Time. Logging will begin at a date and time you
specify.
• Push Button. Logging will begin once you press the
Start/Stop logging button for 3 seconds.
10. Choose when to stop logging:
• When Memory Fills. Logging will end once the logger
memory is full.
• Never (Wrap When Full). The logger will continue
recording data indefinitely, with newest data overwriting
the oldest.
• Push Button. Logging will end once you press the
Start/Stop logging button for 3 seconds. Note that if you
also choose Push Button to start logging, then you will
not be able to stop logging until 30 seconds after logging
begins.
If you select the Push Button setting, then you also have
the option to select “Allow button restart” This allows
you to stop and then restart logging during the
deployment by pushing the Start/Stop button on the
logger for 3 seconds.
Important:
When “Allow button restart” is selected and you
use the Start/Stop button to stop and restart logging,
logging will restart on the next even logging interval, not at
the time the button was pushed. (continued)