Onset HOBO MX100 User manual

HOBO® MX100 Temp Logger Manual
20813-J
The HOBO MX100 Temp logger measures temperature in indoor environments. With an IP67
environmental rating, the logger can be deployed indoors where moisture may form. This
Bluetooth® Low Energy (BLE)-enabled logger is designed for wireless communication with a
phone, tablet, or computer. Using the HOBOconnect® app, you can easily configure the logger
and then download logged data to view or export it for further analysis. The logger has a built-
in alarm you can configure to trip at thresholds you specify. Designed with a non-replaceable
lithium battery, this logger also has a power-saving mode that allows you to use the Bluetooth
signal only when needed to maximize battery life. Note: This logger is not supported by the
HOBO MX Gateway. Contact Onset Technical Support for questions on MX100 logger
compatibility with the gateway.
Specifications
Temperature Sensor
Range -30° to 70°C (-22° to 158°F)
Accuracy ±1.0°C from -30° to -5°C (±1.8°F from -22° to 23°F)
±0.5°C from -5° to 50°C (±0.9°F from 23° to 122°F)
±1.0°C from 50° to 70°C (±1.8°F from 122° to 158°F)
Resolution 0.04°C (0.072°F)
Drift <0.01°C (0.018°F) per year
Response Time 6 minutes typical to 90% in open air moving 1 m/s, unmounted
Logger
Logger Operating Range -30° to 70°C (-22° to 158°F)
Radio Power 1 mW (0 dBm)
Transmission Range Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard Bluetooth Low Energy (Bluetooth Smart)
Logging Rate 1 second to 18 hours
Time Accuracy ±1 minute per month at 25°C (77°F)
Battery CR2450 3V lithium, not replaceable
Battery Life 1 year, typical with logging interval of 1 minute and Bluetooth Always On
enabled; 2 years, typical with logging interval of 1 minute and Bluetooth
Always On disabled. Faster logging intervals, remaining connected with
the app, excessive downloads, and paging may impact battery life.
Memory 30,000 measurements
Full Memory Download
Time
Approximately 30 seconds; may take longer the farther the device is
from the logger
Dimensions 6.9 x 4.5 x 1.1 cm (2.71 x 1.76 x 0.42 inches)
W
eight 25.5 g (0.90 oz)
Environmental Rating IP67
The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).
See last page
Passed RTCA DO160G, part 21H
HOBO MX100
Temp Logger
Required Items:
•HOBOconnect app
•Mobile device with
Bluetooth and iOS,
iPadOS®, or
Android™, or a
Windows computer
with a native BLE
adapter or supported
BLE dongle

HOBO MX100 Temp Logger Manual
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Logger Components and Operation
Mounting Loop: Use this when deploying the logger by tying it
to an object.
Alarm LED: This LED blinks red every 4 seconds when an alarm
is tripped (unless Show LED is disabled as described in
Configuring the Logger). Both this LED and the status LED blink
once when you press the start button to wake up the logger
before configuring it. If you blink the logger LED with the app,
both LEDs illuminate for 4 seconds.
Status LED: This LED blinks green every 4 seconds when the
logger is logging (unless Show LED is disabled as described in
Configuring the Logger). If the logger is waiting to start logging
because it was configured to start On Button Push or with a
delayed start, it blinks green every 8 seconds.
Start Button: Press this button for 1 second to wake up the
logger; both the alarm and status LEDs blink. Once the logger is
awake, press this button for 1 second to move it to the top of
the loggers list in the app. Press this button for 4 seconds to
start or stop the logger when it is configured to start or stop On
Button Push (see Configuring the Logger). Both LEDs blink four
times when you press the button to start or stop logging. Press
this button for 10 seconds to reset a password.
Downloading the App and
Connecting to a Logger
Install the HOBOconnect app to connect to and work with the
logger.
1. Download HOBOconnect to a phone or tablet from the App
Store® or Google Play™.
Download the app to a Windows computer from
www.onsetcomp.com/products/software/hoboconnect.
2. Open the app and enable Bluetooth in the device settings if
prompted.
3. Press the button on the logger to wake it up.
4. Tap Devices and then tap the logger tile in the app to
connect to the logger.
If the logger does not appear or if it is having trouble
connecting, follow these tips.
•Make sure the logger is awake by pressing the start
button. The alarm and status LEDs blink once when the
logger wakes up. You can also press the button a second
time to bring it to the top of the list in the app if you are
working with multiple loggers.
•Make sure the logger is within range of your mobile
device or computer. The range for successful wireless
communication is approximately 30.5 m (100 ft) with full
line-of-sight.
•If your device can connect to the logger intermittently or
loses its connection, move closer to the logger, within
sight if possible.
•If the logger appears in the app, but you cannot connect
to it, close the app and then power down your device to
force the previous Bluetooth connection to close.
Once the logger is connected, you can:
Tap this: To do this:
Specify logger settings and save them to the
logger to start logging. See Configuring the
Logger.
Tap to view live data.
Illuminate the logger LEDs for several seconds
(MX100, MX2200, MX2300, and MX2501).
Lock the logger. Set a password for the logger so
that it is not mistakenly stopped or reconfigured.
Tap the icon, enter a password, and then tap Set.
Once a password is entered on a phone or tablet,
that mobile device is the only one to remember
it. This means you can connect to the logger
without entering a password on that mobile
device, but you must enter a password on all
other mobile devices. For example, if you set the
password for the logger with your tablet and
then try to connect to the device later with your
phone, you must enter the password on the
phone but not with your tablet. Similarly, if
others attempt to connect to the logger with
different devices, they are also required to enter
the password.
To reset a password:
•Press the Start/Stop button for 10 seconds,
or
•Tap Manage Password and then tap Reset.
Manage Password. Reset your existing password
or set a new password for the logger.
Stop logging data (this overrides any Stop
Logging settings described in Configuring the
Logger).
Start logging if the logger was configured to start
with a button push. See Configuring the Logger.
Download logger data. See Downloading Data
From the Logger.
Mark the logger as a favorite. You can then filter
the list of devices to show only loggers marked as
favorites.
Update the firmware on the logger. A logger
readout is completed automatically at the
beginning of the firmware update process.
Important: Before updating the firmware on the
logger, check the remaining battery level and
make sure it is no less than 30%. Make sure you
Alarm LED
Status LED
Mounting
Loop
Start Button

HOBO MX100 Temp Logger Manual
U.S. and International Sales: 1-508-759-9500 3 www.onsetcomp.com
Tap this: To do this:
have the time to complete the entire update
process, which requires that the logger remains
connected to the device during the upgrade.
Configuring the Logger
Use the HOBOconnect app to set up the logger, including
setting alarms, selecting the options to start and stop logging,
and choosing a logging mode. These steps provide an overview
of setting up the logger. For complete details, see the
HOBOconnect User Guide.
1. Press the button on the logger to wake it up.
2. In the app, tap Devices. If you are working with multiple
loggers, press the button on the logger a second time to
bring it to the top of the list. Tap the logger tile in the app to
connect to the logger.
3. Tap Configure & Start to configure the logger.
4. Tap Name and type a name for the logger (optional). If you
do not enter a name, the app uses logger serial number as
the name.
5. Tap Group to add the logger to a group (optional).
6. Tap Logging Interval and choose how frequently the logger
will record data unless operating in burst logging mode (see
Burst Logging).
7. Tap Start Logging and select when logging begins:
•On Save. Logging begins immediately after configuration
settings are saved.
•On Next Interval. Logging begins at the next even
interval as determined by the selected logging interval.
•On Button Push. Logging begins when you press either
the Start/Stop logging button on the logger for 3 seconds
or start logging with the app.
•On Date/Time. Logging begins at a date and time you
specify. Select the Date and Time.
8. Tap Stop Logging and specify when logging ends.
•Never Stop (Overwrites Old Data). The logger does not
stop at any predetermined time. The logger continues
recording data indefinitely, with newest data overwriting
the oldest.
•On Date/Time. The logger stops logging on a specific
date and time that you specify.
•After. Select this if you want to control how long the
logger should continue logging once it starts. Choose the
amount of time you want the logger to log data. For
example, select 30 days if you want the logger to log data
for 30 days after logging begins.
•Stop When Memory Fills. The logger continues recording
data until the memory is full.
9. Tap Pause Options, then select Pause On Button Push to
specify that you can pause the logger by pressing its button
for 3 seconds. Select Allow Button Resume to specify that
you can press the Start/Stop button on the logger to
resume logging.
10. Enable or disable Show LED. If Show LED is disabled, the
alarm and status LEDs on the logger are not illuminated
while logging (the alarm LED does not blink if an alarm
trips). You can temporarily turn on LEDs when Show LED is
disabled by pressing the button on the logger for 1 second.
11. Enable or disable Bluetooth Always On. If Bluetooth Always
On is enabled, the logger advertises or regularly sends out a
Bluetooth signal for the phone or tablet to find via the app
while it is logging, which uses battery power. When
Bluetooth Always On is disabled, the logger advertises only
during logging when you press the button on the logger to
wake it up, thereby preserving as much battery power as
possible.
12. Tap Alarms to open that area of the screen.
13. Select Low if you want an alarm to trip when the sensor
reading falls below the low alarm value. Enter a value to set
the low alarm value.
14. Select High if you want an alarm to trip when the sensor
reading rises above the high alarm value. Enter a value to
set the high alarm value.
15. For the Duration, select how much time should elapse
before the alarm trips and select one of the following:
•Cumulative Samples. The alarm trips once the sensor
reading is out of the acceptable range for the selected
duration any time during logging. For example, if the high
alarm is set to 85°F and the duration is set to 30 minutes,
the alarm trips once the sensor readings have been
above 85°F for a total of 30 minutes since the logger was
configured.
•Consecutive Samples. The alarm trips once the sensor
reading is out of the acceptable range continuously for
the selected duration. For example, the high alarm is set
to 85°F and the duration is set to 30 minutes, the alarm
trips only if all sensor readings are 85°F or above for a
continuous 30-minute period.
16. Tap Start to save the configuration settings.
Logging begins based on the settings you selected. Press the
start button on the logger if you set it up to start logging with a
button push. See Mounting the Logger for details on mounting
and see Downloading Data From the Logger for details on
downloading.
If the logger is configured with alarm settings, an alarm trips
when the temperature reading is outside the range specified in
the logger configuration. When an alarm trips, the logger alarm
LED blinks every 4 seconds (unless Show LED is disabled), an
alarm icon appears in the app, and an Alarm Out of Range
event is logged. Even if the temperature reading returns to a
normal range, the alarm indicator does not clear in the app and
the alarm LED continues to blink.
Setting a Password
You can create an encrypted password for the logger that is
required if another device attempts to connect to it. This is
recommended to ensure that a deployed logger is not
mistakenly stopped or purposely altered by others. This
password uses a proprietary encryption algorithm that changes
with every connection.
To set a password:
1. Tap Devices. Press the Start/Stop button on the logger to
wake it up, if necessary. Tap the logger tile in the app to
connect to it.

HOBO MX100 Temp Logger Manual
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2. Tap Lock Logger.
3. Type a password and then tap Set.
Only the device used to set the password can then connect to
the logger without entering a password; all other devices are
required to enter the password. For example, if you set the
password for the logger with your tablet and then try to
connect to the logger later with your phone, you must enter
the password on the phone but not with your tablet. Similarly,
if others attempt to connect to the logger with different
devices, they are also required to enter the password. To reset
a password, press the button on the logger for 10 seconds or
connect to the logger and tap Manage Password and tap Reset.
Downloading Data From the Logger
To download data from the logger:
1. Tap Devices. Press the button on the logger to wake it up, if
necessary. Tap the logger tile in the app to connect to the
logger.
2. Tap Download Data. The logger downloads data to the
phone, tablet, or computer.
3. Once the download is complete, tap Done to return to the
previous page or tap Export and Share to save the file in the
specified format.
4. When the export file has successfully been created, tap
Done to return to the previous page or tap Share to use
your device’s usual modes of sharing.
You can also upload data automatically to HOBOlink, Onset’s
web-based software, using the app or the MX gateway. For
details, see the HOBOconnect User Guide and see the HOBOlink
help for details on working with data in HOBOlink.
Logger Events
The logger records the following events to track logger
operation and status. You can view events in exported files or
plot events in the app.
1. To plot events, tap HOBO Files and select a file to open.
2. Tap (if applicable) and then tap . Select the events
you want to plot and tap OK.
Event Name Definition
Host Connect The logger was connected to a mobile
device.
Started The logger started logging.
Stopped The logger stopped logging.
Alarm Out of
Range/In Range
An alarm has occurred because the
reading was outside the alarm limits or
back within range. Note: Although the
Event Name Definition
reading may return to a normal range, the
alarm indicator does not clear in the app
and the alarm LED continues to blink until
you reconfigure the logger.
Safe Shutdown The battery level dropped below a safe
operating voltage and performed a safe
shutdown.
Mounting the Logger
You can mount the logger using tape or the mounting loop.
•On the back of the logger, remove the backing on the tape
that is adhered to the top and bottom of the logger and then
mount it on a flat surface.
•Use the mounting loop to tie the logger to another object.
The logger can be placed in indoor locations that experience
condensation. Although the logger can withstand incidental
splashing with water, do not deploy it in a permanently wet
location.
Protecting the Logger
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 the Onset website:
www.onsetcomp.com.
Battery Information
The logger uses one CR2450 non-replaceable lithium battery.
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 and the frequency of connections, downloads, and
paging. Deployments in extremely cold or hot temperatures or
a logging interval faster than 1 minute can affect battery life.
Estimates are not guaranteed due to uncertainties in initial
battery conditions and operating environment.
WARNING: Do not cut open, incinerate, heat above 85°C
(185°F), or recharge the lithium battery. The battery may
explode if the logger is exposed to extreme heat or conditions
that could damage or destroy the battery case. Do not dispose
of the logger or battery in fire. Do not expose the contents of
the battery to water. Dispose of the battery according to local
regulations for lithium batteries.

HOBO MX100 Temp Logger Manual
U.S. and International Sales: 1-508-759-9500
www.onsetcomp.com/support/contact
© 2016–2022 Onset Computer Corporation. All rights reserved. Onset, HOBO, HOBOconnect, and HOBOlink are
registered trademarks of Onset Computer Corporation. App Store, iPhone, iPad, and iPadOS are service marks or
registered trademarks of Apple Inc. Android and Google Play are trademarks of Google LLC. Windows is a registered
trademark of Microsoft Corporation. Bluetooth and Bluetooth Smart is a registered trademark of Bluetooth SIG, Inc.
All other trademarks are the property of their respective companies.
Patent #: 8,860,569 20813-J
Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one of the following measures:
•Reorient or relocate the receiving antenna
•Increase the separation between the equipment and receiver
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected
•Consult the dealer or an experienced radio/TV technician for help
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operation.
FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.
Industry Canada Statements
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation of the device.
Avis de conformité pour l’Industrie Canada
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1)
l'appareil ne doit pas produire de brouillage, et (2) l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le
fonctionnement.
To comply with FCC and Industry Canada RF radiation exposure limits for general population, the logger must be installed to provide a separation distance of at least 20cm from
all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.