Page 1
HOBO® MX Temp/RH Data Logger (MX1101) Manual
The HOBO MX Temp/RH data logger records and transmits temperature and relative humidity
(RH) in indoor environments with its integrated sensors. This Bluetooth® Low Energy-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 for further analysis. The logger can calculate minimum, maximum, average, and
standard deviation statistics and be configured to trip audible or visual alarms at thresholds you
specify. The logger also supports burst logging in which data is logged at a different interval
when sensor readings are above or below certain limits. This compact data logger also has a
built-in LCD screen to display the current temperature, relative humidity, logging status, battery
use, memory consumption, and more.
Specifications
Temperature Sensor
HOBO MX Temp/RH
Data Logger
Models: MX1101
MX1101-01 (Japan
and Korea)
Included Items:
• Command™ strip
• Double-sided tape
• Hook & loop strap
• Two AAA 1.5 V alkaline
batteries
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
Range -20° to 70°C (-4° to 158°F)
Accuracy ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F), see Plot A
Resolution 0.024°C at 25°C (0.04°F at 77°F), see Plot A
Drift <0.1°C (0.18°F) per year
RH Sensor*
Range 1% to 90% (non-condensing)
Accuracy ±2% from 20% to 80% typical to a maximum of ±4.5% including
Resolution 0.01%
Drift <1% per year typical
Response Time
Temperature 7:30 minutes in air moving 1 m/s (2.2 mph)
RH 20 seconds to 90% in airflow of 1 m/s (2.2 mph)
Logger
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)
Logger Operating Range -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing)
Logging Rate 1 second to 18 hours
Logging Modes Fixed interval (normal, statistics) or burst
Memory Modes Wrap when full or stop when full
Start Modes Immediate, push button, date & time, or next interval
Stop Modes When memory full, push button, date & time, or after a set logging
Restart Mode Push button
Time Accuracy ±1 minute per month at 25°C (77°F), see Plot B
Battery Life 1 year, typical with logging interval of 1 minute. Faster logging and/or
Battery Type Two AAA 1.5 V alkaline batteries, user replaceable
Memory 128 KB (84,650 measurements, maximum)
Full Memory Download Time Approximately 60 seconds; may take longer the further the device is
*Per RH sensor manufacturer data sheet
hysteresis at 25°C (77°F); below 20% and above 80% ±6% typical
period
statistics sampling intervals, entering burst logging mode, and
remaining connected with the app will impact battery life. Excessive
readouts, audible alarms, and paging all impact battery life. Visual
alarms and other events can have a marginal impact on battery life.
from the logger
17840-T
Find Quality Products Online at: [email protected]
www.GlobalTestSupply.com
Page 2
HOBO MX Temp/RH Data Logger (MX1101) Manual
Specifications (continued)
LCD LCD is visible from 0° to 50°C (32° to 122°F); the LCD may react slowly
Size 3.66 x 8.48 x 2.29 cm (1.44 x 3.34 x 0.9 in.)
Weight 56 g (1.98 oz)
Environmental Rating IP50
*Per RH sensor manufacturer data sheet
or go blank in temperatures outside this range
The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).
See last page
Plot A: Temperature
Accuracy and Resolution
Plot B: Time Accuracy
Logger Components and Operation
Start/Stop Button
LCD Screen
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 the app
with a push button start or stop, and with Allow Button Restart
selected (see Configuring the Logger). You can also press this
button for 1 second to record an internal event (see Logger
Events), to silence a beeping alarm (see Setting up Alarms), or
to turn the LCD screen on if the option to turn off the LCD has
been enabled (see Configuring the Logger).
Press both the Start/Stop button and the Alarm/Stats button
simultaneously for 3 seconds to reset a logger password.
Alarm/Stats Button: Press this button for 1 second to switch
between statistics, alarm readings, and the current sensor
readings as applicable or to silence a beeping alarm. Press this
button for 3 seconds to clear a visual alarm if the logger was
configured in the app to maintain the visual alarm until the
alarm button was pressed (see Setting up Alarms).
Alarm/Stats Button
Temperature
Sensor
Mounting
Loop
RH Sensor (behind panel)
Mounting Loops: Use the two mounting loops (only one visible
in the diagram) to mount the logger with the hook-and-loop
strap (see Mounting the Logger).
Temperature Sensor: This sensor is located in the lower left
corner of the raised panel to the right of the LCD screen.
RH Sensor: This sensor is located behind the vented panel in
the logger case to the right of the LCD screen and the
temperature sensor.
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 on the next page.
LCD Symbol Description
The logger is waiting to be started or restarted.
Press and hold the Start/Stop button for 3 seconds
to start the logger.
Find Quality Products Online at: [email protected]
www.GlobalTestSupply.com
Page 3
HOBO MX Temp/RH Data Logger (MX1101) Manual
LCD Symbol Description
The logger has been started with push button stop
enabled; press and hold the Start/Stop button for
3 seconds to stop the logger.
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 started, 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 until the batteries die
or the logger is reconfigured. 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 limit 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 visual
alarms were configured in the app. If the visual
alarm was set to clear when the logger is
reconfigured, this symbol will remain on the LCD
until the next time new configuration settings are
loaded onto the logger (see Configuring the
Logger). Otherwise, it will clear when the sensor
reading is back within the alarm limits or by
pressing the Alarm/Stats button for 3 seconds.
A visual alarm is ready to be cleared. This will only
appear if the app was configured to maintain the
visual alarm until the alarm button is pressed.
Press the Alarm/Stats button for 3 seconds to
clear the visual alarm. Note that an audible alarm
can be silenced by pressing the Start/Stop button
or Alarm/Stats button for 1 second.
These symbols show the maximum, minimum,
average, and standard deviation values most
recently calculated by the logger (if the fixed
logging mode has been selected in the app and
each statistic has been selected; see Statistics
Logging). Press the Alarm/Stats button for 1
second to cycle through the available statistics and
then back to the current sensor reading (or to the
alarm value if applicable).
This is the farthest out-of-range sample displayed
during the logger deployment. 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.
This is an example of a temperature reading.
Temperature units are determined by the settings
in the app. To switch between Celsius and
Fahrenheit, change the units in the app settings
(the logger must be reconfigured for units changes
to take effect).
LCD Symbol Description
This is an example of an RH reading.
The logger has been configured to start logging on
a particular date/time. The display will count down
in days, hours, minutes, and seconds until logging
begins. In this example, 5 minutes and 38 seconds
remain until logging will begin.
The configure settings are being loaded onto the
logger from the app.
An error occurred while loading the configuration
settings onto the logger from the app. Try
reconfiguring the logger.
The logger has been stopped with the app or
because the memory is full.
Notes:
• You can disable the LCD screen when logging. Deselect
“Show LCD” when setting up the logger as described in
the next section. When this option is disabled, you can
still temporarily view the LCD screen by pushing the
Start/Stop button for 1 second. The LCD will then remain
on for 10 minutes.
• The LCD screen refreshes every 15 seconds regardless of
the logging interval selected in the app. If you choose a
logging interval less than 15 seconds, the data will be
recorded at the faster interval, but the sensor readings
will only be updated on the screen every 15 seconds.
• When the logger has stopped logging, the LCD screen will
remain on with “STOP” displayed until the logger is
offloaded to your mobile device (unless the logger was
configured with the “Show LCD” option disabled). Once
the logger has been offloaded, the LCD will turn off
automatically after 2 hours. The LCD will turn back on the
next time the logger connects with your device through
the app.
• The LCD screen flashes “HELLO” when you page the
logger from the app (see Downloading the App and
Connecting to a Logger).
• The LCD screen flashes “CHIRP OFF” when an audible
alarm is cleared.
Downloading the App and
Connecting to a Logger
Install the app to connect to and work with the logger.
1. Download the app. Download HOBOconnect to a phone or
tablet from the App Store® or Google Play™ or download
the app to a Windows computer
the logger and insert two AAA batteries observing polarity
(see Battery Information). Reinsert the battery door and
snap it back into place.
3. Open the app. Enable Bluetooth in your device settings if
prompted.
4. Connect to the logger. Tap Devices and then tap the logger
in the app to connect to it.
Find Quality Products Online at: [email protected]
www.GlobalTestSupply.com
Page 4
HOBO MX Temp/RH Data Logger (MX1101) Manual
If the logger does not appear or if it is having trouble
connecting, follow these tips:
• 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:
Select logger settings and save them onto the
logger to start logging. See Configuring the
Logger.
Read out (offload) logger data. See Reading Out
the Logger.
>
>
>
>
>
>
>
Start or restart logging depending on the
configuration settings selected in Configuring the
Logger.
Stop the logger from recording data (this
overrides any Stop Logging settings described in
Configuring the Logger).
Make the logger beep one time to help you
locate it. “HELLO” also appears on the LCD when
the logger is paged.
Stop a beeping alarm on the logger if audible
alarms are enabled as described in Setting up
Alarms.
Set a password for the logger that will be
required if another mobile device attempts to
connect to it. To reset a password,
simultaneously press both the Start/Stop button
and the Alarm/Stats button on the top of the
logger for 3 seconds or tap and tap Reset.
Mark the logger as a favorite. You can then filter
the list of devices to only show loggers marked as
favorites.
Update the firmware on the logger. A logger
readout will be 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 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 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 app user’s guide.
1. In the app, tap Devices and then tap the logger to connect
to it.
2. Tap to configure the logger.
3. Tap Name and type a name for the logger (optional). If no
name is selected, the logger serial number is used as the
name.
4. Tap Group to add the logger to a group (optional). Tap Save.
5. Tap Logging Interval and choose how frequently the logger
will record data unless operating in burst logging mode (see
Burst Logging).
6. Tap Start Logging and select when logging will begin:
• Now. Logging will begin immediately after the
configuration settings are loaded on the logger.
• On Next Logging Interval. Logging will begin at the next
even interval as determined by the selected logging
interval.
• On Button Push. Logging will begin once you press the
Start/Stop logging button on the logger for 3 seconds or
start logging with the app.
• On Date/Time. Logging will begin at a date and time you
specify. Select the Date and Time.
Tap Save.
7. Tap Stop Logging and select the options for when logging
will end.
a. Choose one of two memory options:
• When Memory Fills. The logger will continue recording
data until the memory is full.
• Never (Wrap When Full). The logger will continue
recording data indefinitely, with newest data
overwriting the oldest. This option is not available if
the Logging Mode is set to Burst (see Burst Logging).
b. Select On Button Push if you want to be able to stop
logging by pushing the Start/Stop button on the logger
for 3 seconds.
If you select On Button Push for the Stop Logging option,
then you also have the option to select Allow Button
Restart. This allows you to stop and then resume logging
during the deployment by pushing the Start/Stop button
on the logger for 3 seconds.
Note: Tapping this icon is only required when using the
app on an iPhone®, iPad®, or Android device.
Find Quality Products Online at: [email protected]
www.GlobalTestSupply.com
Page 5
HOBO MX Temp/RH Data Logger (MX1101) Manual
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. For example, a logger
started logging at 7:00 AM with a logging interval set to 1
hour. If you press the Start/Stop button to stop the logger
at 8:45 AM and then press the button again at 10:15 AM,
logging will not begin immediately at 10:15 AM. Instead,
logging will begin again at 11:00 AM, which is the next
even interval time based on your 1-hour logging interval.
Therefore, depending on the logging interval, the gap
between the time you press the button to resume logging
and the time actual logging begins could be significant.
The faster the logging interval, the less time will elapse
before logging resumes.
c. Select one of the following time options for when to stop
logging:
• Never. Select this if you do not want the logger to stop
at any predetermined time frame.
• On Date/Time. Select this if you want the logger to
stop logging on a specific date and time. Select the
date and time.
• 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.
d. Tap Save.
8. Tap Logging Mode. Select either fixed or burst logging. With
fixed logging, the logger records data for all enabled sensors
and/or selected statistics at the logging interval selected
(see Statistics Logging for details on choosing statistics
options). In burst mode, logging occurs at a different
interval when a specified condition is met. See Burst
Logging for more information. Tap Save.
9. Enable or disable Show LCD, which controls whether the
LCD on the logger will remain illuminated while the logger is
logging. If you disable Show LCD, the LCD on the logger will
not show the current reading, status, or other information
while the logger is logging. You will, however, be able to
temporarily turn the LCD screen on by pressing the
Start/Stop button on the logger for 1 second. In addition,
you can always view the status of any in-range logger on
your mobile device regardless of the logger’s LCD setting
(may require a logger password as applicable).
10. Select the sensor measurement types that will be logged.
By default, both the temperature and RH sensors are
enabled. Both sensors are required to calculate dew point,
which is an additional data series available for plotting after
reading out the logger. You can also set up alarms to trip
when a sensor reading rises above or falls below a specified
value. See Setting up Alarms for details on enabling sensor
alarms and selecting the associated audible and visual
alarm settings.
11. Select whether to upload data to HOBOlink® via the
gateway or the app (optional and requires an active
HOBOlink account).
12. Tap to save the configuration settings.
Logging will begin 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. Deploy the logger using the mounting materials
(see Mounting the Logger). After logging begins, you can read
out the logger at any time (see Reading Out the Logger for
details).
Setting up Alarms
You can set an alarm to trip on the logger when a sensor
reading rises above or falls below a specified value. This can
alert you to problems so you can take corrective action. To set
an alarm:
1. Tap Devices. Tap the logger in the app to connect to it and
tap .
2. Tap a sensor (tap the Enable Logging toggle if necessary).
3. Select High if you want an alarm to trip when the sensor
reading rises above the high alarm value. Drag the slider or
type a value to set the high alarm value.
4. Select Low if you want an alarm to trip when the sensor
reading falls below the low alarm value. Drag the slider or
type a value to set the low alarm value.
5. For the Duration, select how much time should elapse
before the alarm trips and select one of the following:
• Cumulative. The alarm will trip 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, then the
alarm will trip once the sensor readings have been above
85°F for a total of 30 minutes since the logger was
configured.
• Consecutive. The alarm will trip 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, then the
alarm will only trip if all sensor readings are 85°F or
above for a continuous 30-minute period.
6. Tap Save and repeat steps 2–6 for the other sensor if
desired.
7. In the configuration settings, enable Audible Alarm if you
want a beep to sound on the logger every 30 seconds when
the sensor alarm trips. The beeping will continue until the
alarm is cleared from the app, either button on the top of
the logger is pressed, or 7 days have passed. Battery life will
be slightly reduced when this setting is enabled. It is
recommended that you only enable this feature if you have
regular access to the logger so that you can easily turn off
the beeping.
8. For Maintain Visual Alarms Until, select one of the following
options to determine how long the alarm icon will remain
illuminated on the logger LCD screen after an alarm trips:
• Logger Reconfigured. The alarm icon will remain visible
on the LCD until the next time the logger is reconfigured.
• Sensor in Limits. The alarm icon will remain visible on the
LCD until the sensor reading returns to the normal range
between any configured high and low alarm limits.
Find Quality Products Online at: [email protected]
www.GlobalTestSupply.com
Page 6
HOBO MX Temp/RH Data Logger (MX1101) Manual
• Alarm Button Pressed. The alarm icon will remain visible
until you press the Alarm/Stats button on the logger.
9. Tap .
Notes:
• The alarm icon will be illuminated on the logger LCD
when the alarm trips. You can also press the Alarms/Stats
button on the logger to view the farthest out-of-range
value during the deployment. Alarm limits are checked
when the logger’s LCD screen refreshes every 15
seconds.
• The actual values for the high and low alarm limits are set
to the closest value supported by the logger. In addition,
alarms can trip or clear when the sensor reading is within
the resolution specifications. This means the value that
triggers the alarm may differ slightly than the value
entered.
• When you read out the logger, alarm events can be
displayed on the plot or in the data file. See Logger
Events.
• Once cleared, an audible alarm will start beeping again if
the sensor values go out of the normal range. Even if an
audible alarm is cleared, a visual alarm may remain on
the logger LCD and in the app depending on the settings
selected for maintaining visual alarms or because the
alarm condition may still be in effect. In addition, an
audible alarm will continue beeping when the sensor
values have returned to the normal range until it is
cleared as described in step 8.
• Although an audible alarm and a visual alarm can occur
at the same time when a sensor alarm is tripped, they are
cleared in different ways. The audible alarm can be
cleared as described in step 8. Meanwhile, a visual alarm
is cleared as determined by the setting selected for
Maintain Visual Alarm Until configuration setting. This
means you could clear a beeping audible alarm and the
visual alarm will remain on the LCD and in the app until
the logger is reconfigured, the sensor is in limits, or the
alarm button is pressed--whichever setting you selected.
• If the logger was configured to stop logging with a button
push, any tripped alarms will be cleared automatically
when logging is stopped and no Alarm Cleared event will
be logged. This ensures that the logger will start checking
for alarm conditions when logging resumes (if the logger
was configured with Allow Button Restart selected).
Burst Logging
Burst logging is a logging mode that allows you to set up more
frequent logging when a specified condition is met. For
example, a logger is recording data at a 5-minute logging
interval and burst logging is configured to log every 30 seconds
when the temperature rises above 85°F (the high limit) or falls
below 32°F (the low limit). This means the logger will record
data every 5 minutes as long as the temperature remains
between 85°F and 32°F. Once the temperature rises above
85°F, the logger will switch to the faster logging rate and record
data every 30 seconds until the temperature falls back to 85°F.
At that time, logging then resumes every 5 minutes at the
normal logging interval. Similarly, if the temperature falls below
32°F, then the logger would switch to burst logging mode again
and record data every 30 seconds. Once the temperature rises
back to 32°F, the logger will then return to normal mode,
logging every 5 minutes. Note: Sensor alarms, statistics, and the
Stop Logging option “Wrap When Full” are not available in
burst logging mode.
To set up burst logging:
1. Tap Devices. Tap the logger in the app to connect to it and
tap .
2. Tap Logging Mode and then tap Burst Logging.
3. Select Low and/or High and either type or drag the slider to
set the low and/or high values.
4. Repeat step 3 for the other sensor if desired.
5. Set the burst logging interval, which must be faster than the
logging interval. Keep in mind that the more frequent the
burst logging rate, the greater the impact on battery life
and the shorter the logging duration.
6. Tap Save.
7. Tap .
Notes:
• The high and low burst limits are only checked when the
logger's LCD screen refreshes once every 15 seconds.
Therefore, if you set the logging interval to less than 15
seconds and the sensor reading falls outside the levels,
the burst logging will not begin until the next 15-second
refresh cycle.
• If high and/or low limits have been configured for more
than one sensor, then burst logging will begin when any
high or low condition goes out of range. Burst logging will
not end until all conditions on all sensors are back within
normal range.
• The actual values for the burst logging limits are set to
the closest value supported by the logger.
• Burst logging mode can begin or end when the sensor
reading is within the resolution specifications. This means
the value that triggers burst logging may differ slightly
than the value entered.
• Once the high or low condition clears, the logging
interval time will be calculated using the last recorded
data point in burst logging mode, not the last data point
recorded in normal mode. For example, a logger has a
10-minute logging interval and logged a data point at
9:05. Then, the high limit was surpassed and burst
logging began at 9:06. Burst logging then continued until
9:12 when the sensor reading fell back below the high
limit. Now back in normal mode, the next logging interval
will be 10 minutes from the last burst logging point, or
9:22 in this case. If burst logging had not occurred, the
next data point would have been at 9:15.
• A New Interval event is created each time the logger
enters or exits burst logging mode. See Logger Events for
details on plotting and viewing the event. In addition, if
the logger is stopped with a button push while in burst
logging mode, then a New Interval event is automatically
logged and the burst condition is cleared, even if the
actual high or low condition has not cleared. The logger
Find Quality Products Online at: [email protected]
www.GlobalTestSupply.com
Page 7
HOBO MX Temp/RH Data Logger (MX1101) Manual
will check the high and low conditions when logging
resumes (if the logger was configured with Allow Button
Restart selected).
more frequent the sampling rate, the greater the impact on
battery life.
6. Tap Save.
Statistics Logging
During fixed logging, the logger records data for enabled
sensors and/or selected statistics at the logging interval
selected. Statistics are calculated at a sampling rate you specify
with the results for the sampling period recorded at each
logging interval. The following statistics can be logged for each
sensor:
• The maximum, or highest, sampled value,
• The minimum, or lowest, sampled value,
• An average of all sampled values, and
• The standard deviation from the average for all sampled
values.
For example, a logger is configured with both the temperature
and RH sensors enabled, and the logging interval set to 5
minutes. The logging mode is set to fixed logging with Normal
and all four statistics enabled and with a statistics sampling
interval of 30 seconds. Once logging begins, the logger will
measure and record the actual temperature and RH sensor
values every 5 minutes. In addition, the logger will take a
temperature and RH sample every 30 seconds and temporarily
store them in memory. The logger will then calculate the
maximum, minimum, average, and standard deviation using the
samples gathered over the previous 5-minute period and log
the resulting values. When reading out the logger, this would
result in 10 data series (not including any derived series, such
as dew point): two sensor series (with temperature and RH
data logged every 5 minutes) plus eight maximum, minimum,
average, and standard deviation series (four for temperature
and four for RH with values calculated and logged every 5
minutes based on the 30-second sampling).
To log statistics:
1. Tap Devices. Tap the logger in the app to connect to it and
tap .
2. Tap Logging Mode and then select Fixed Logging.
3. Select Normal to record the current reading for each
enabled sensor at the logging interval shown at the top of
the screen. Do not select this if you only want to log
statistics.
4. Select the statistics you want the logger to record at each
logging interval: Maximum, Minimum, Average, and
Standard Deviation (average is automatically enabled when
selecting Standard Deviation). Statistics will be logged for all
enabled sensors. In addition, the more statistics you record,
the shorter the logger duration and the more memory is
required.
5. Tap Statistics Sampling Interval and select the rate to use
for calculating statistics. The rate must be less than, and a
factor of, the logging interval. For example, if the logging
interval is 1 minute and you select 5 seconds for the
sampling rate, then the logger will take 12 sample readings
between each logging interval (one sample every 5 seconds
for a minute) and use the 12 samples to record the resulting
statistics at each 1-minute logging interval. Note that the
7. Tap .
Once logging begins, click the Alarm/Stats button on the logger
to cycle through the current maximum, minimum, average, and
standard deviation data on the LCD screen. Note that the logger
will always display the current sensor readings in the app even
if they are not being logged. You can plot the statistics series
once you read out the logger.
Setting a Password
You can create an encrypted password for the logger that will
be 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. Tap the logger to connect to it.
2. Tap (if applicable) and tap .
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 will
be 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 will be
required to enter the password on the phone but not with your
tablet. Similarly, if others attempt to connect to the logger with
different devices, then they would also be required to enter the
password. To reset a password, simultaneously press both the
Start/Stop button and the Alarm/Stats button on the top of the
logger for 3 seconds
applicable), tap , and tap Reset.
or connect to the logger and tap (if
Reading Out the Logger
To offload data from the logger:
1. Tap Devices. Tap the logger in the app to connect to it.
2. Tap . The logger will read out the data to the phone,
tablet, or computer.
3. Once the readout is complete, tap HOBO Files and select
the file to view it. Tap (if applicable) and tap to
export the data.
Data can also be uploaded automatically to HOBOlink, Onset’s
web-based software, via the app or the MX gateway. For
details, see the app user’s guide and see the HOBOlink help for
details on working with data in HOBOlink.
Logger Events
The logger records the following internal events to track logger
operation and status. You can view events in exported files or
plot events in the app.
Find Quality Products Online at: [email protected]
www.GlobalTestSupply.com
Page 8
HOBO MX Temp/RH Data Logger (MX1101) Manual
To plot events, tap HOBO Files and select a file to open.
Tap (if applicable) and tap . Select the events you want
to plot and tap OK.
Internal Event Name Definition
Host Connected The logger was connected to the mobile
Started
Stopped
Button Up/Button
Down
Chan <#> Alarm
Tripped
Chan <#> Alarm
Cleared
New Interval The logger has entered or exited burst
Safe Shutdown
device.
The Start/Stop button was pressed to begin
or resume logging.
The logger received a command to stop
recording data (from the app or by pushing
the Start/Stop button).
The Start/Stop button was pressed for
1 second.
A sensor alarm has tripped; <#> is the sensor
number, where 1 is temperature and 2 is RH.
A sensor alarm has cleared; <#> is the sensor
number, where 1 is temperature and 2 is RH.
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.
logging mode.
The battery level dropped below 1.85 V; the
logger performs a safe shutdown.
Mounting the Logger
There are several ways to mount the logger using the materials
included:
• Use the four magnets on the back of the logger case to
mount it to a magnetic surface.
• Attach Command strips to the back of the logger to
mount it a wall or other flat surface. Double up the two
Command strips so that they protrude past the magnets.
• Use the double-sided tape to affix the logger to a surface.
• Insert the hook-and-loop strap through the mounting
loops on both sides of the logger to mount it to a curved
surface, such as a pipe or tubing.
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. If the message FAIL CLK appears on the LCD
screen, there was a failure with the internal logger clock
possibly due to condensation. Remove the battery immediately
and dry the circuit board.
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.
the logger operating range. 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. New batteries typically last 1
year with logging intervals greater than 1 minute. 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.
Note: Make sure the batteries installed have flat negative
terminals. There should be no indent in the bottom of the
batteries. Batteries with indents in the negative terminals may
become loose and prevent proper operation.
Only use batteries
with flat negative
terminals
Do not use batteries with an
indent in the negative terminal
To install or replace the batteries:
1. Open the battery door on the back of the logger.
Mounting
magnet
Battery door
Mounting
magnets
2. Remove any old batteries.
3. Insert two new batteries observing polarity.
4. Reinsert the battery door and snap it back into place.
WARNING: Do not cut open, incinerate, heat above 85°C
(185°F), or recharge the lithium batteries. The batteries 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 batteries in fire. Do not expose the contents of
the batteries to water. Dispose of the batteries according to
local regulations for lithium batteries.
Battery Information
The logger requires two user-replaceable AAA 1.5 V alkaline or
optional lithium batteries for operation at the extreme ends of
Find Quality Products Online at: [email protected]
www.GlobalTestSupply.com
Loading...