Battery Information - Hobo MX1104 Manual

Reading Out the Logger
To offload data from the logger:
1. Tap the Devices icon and then tap Loggers at the top of the
screen. Tap the logger to connect to it. If the logger was
configured with Bluetooth Always On disabled, press a
button on the logger to wake it up. When working with
multiple loggers, you can press the top button on the logger
to bring it to the top of the list.
2. Once connected, tap Readout.
3. Tap the Data Files icon to view a mini‐graph of the
offloaded data.
4. Tap the mini‐graph to view a larger version of the graph or
to share the file.
Data can also be uploaded automatically to HOBOlink, Onset's
web‐based software, via HOBOmobile or the HOBO MX
Gateway. For details on uploading data to HOBOlink, see the
HOBOmobile User's Guide.
Recording Internal Logger Events
The logger records the following internal events to track logger
operation and status. To plot events in HOBOmobile, tap a
mini‐graph and then tap . Select the events you wish to plot
and then tap again. You can also view events in shared or
exported data files.
Internal Event Name Definition
Host Connected The logger was connected to the mobile
device.
Started The top button on the logger was pressed to
begin or resume logging.
Stopped The logger received a command to stop
recording data (from HOBOmobile or by
pushing the top button on the logger).
Chan <#> Alarm A sensor alarm has tripped; <#> is the sensor
Tripped number, 1 through 4.
Chan <#> Alarm A sensor alarm has cleared; <#> is the sensor
Cleared number, 1 through 4. This event also
contains the value that was furthest out of
range for the sensor before the alarm
cleared, which is only available in a shared or
exported file.
New Interval The logger has entered or exited burst
logging mode.
Safe Shutdown The battery level dropped below 1.6 V; the
logger performs a safe shutdown.
Mounting the Logger
Use the four magnets on the back of the logger to mount it to a
magnetic surface or insert the tie wraps through the mounting
loops to attach it to other surfaces. Insert a Santoprene plug
into any empty analog sensor ports if necessary.
1‐800‐LOGGERS
HOBO MX Analog/Temp/RH/Light (MX1104) and MX 4‐Channel Analog (MX1105) Manual
11
Protecting the Logger
The logger is designed for indoor use and can be permanently
damaged by corrosion if it gets wet. Protect it from
condensation.
Note: Static electricity may cause the logger to stop logging.
The logger has been tested to 8 KV, but avoid electrostatic
discharge by grounding yourself to protect the logger. For more
information, search for "static discharge" on onsetcomp.com.
Battery Information
The logger requires two user‐replaceable AAA 1.5 V alkaline or
optional lithium batteries for operation at the extreme ends of
the logger operating range. Battery life is 1 year, typical with a
logging interval of 1 minute, but may be extended to 2 years
when the logger is configured with Bluetooth Always On
disabled. Expected battery life varies based on the ambient
temperature where the logger is deployed, the logging or
sampling interval, frequency of offloading and connection to
the mobile device, number of channels that are active, audible
alarms duration, use of burst mode or statistics logging, and
battery performance. Deployments in extremely cold or hot
temperatures, a logging interval faster than 1 minute, or a
sampling interval faster than 15 seconds can impact battery
life. Estimates are not guaranteed due to uncertainties in initial
battery conditions and operating environment.
To replace the batteries:
1. Use a Phillips‐head screwdriver to unscrew the four screws
on the front of the logger.
2. Carefully separate the top and bottom of the logger
enclosure.
3. Remove any old batteries and insert new batteries
observing polarity.
4. Make sure the rubber seal on the bottom part of the logger
enclosure is clean and free of any debris.
5. Carefully reassemble the logger enclosure and screw in the
four screws.
WARNING: Do not cut open, incinerate, heat above 85°C
(185°F), or recharge lithium batteries. The batteries may
explode if the logger is exposed to extreme heat or conditions
that could damage or destroy the battery cases. Do not dispose
of the logger or batteries in fire. Do not expose the contents of
the batteries to water. Dispose of the batteries according to
local regulations for lithium batteries.
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