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HOBO MX Temp/RH Data Logger (MX1101) Manual 

 

1-508-759-9500 (U.S. and International) 3 

www.onsetcomp.com 

1-800-LOGGERS (U.S. only) 

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 are 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. The logger continues 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 are empty. In this 
example, the memory is full (all five segments are 
filled in) and new data is now overwriting the 
oldest data. This continues 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 clears depending on how visual 
alarms are configured in the app. If the visual 
alarm is set to clear when the logger is 
reconfigured, this symbol remains on the LCD until 
the next time new configuration settings are 
loaded onto the logger (see 

Configuring the 

Logger

). Otherwise, it clears 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 appears 
only if the app is 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 you can silence an audible 
alarm by pressing the Start/Stop button or 
Alarm/Stats button for 1 second. 

 

 

 

 

Press the Alarm/Stats button for 1 second to cycle 
through the statistics configured to display and 
then back to the current sensor reading (or to the 
alarm value if applicable). The screen displays 
these symbols at the bottom and shows the 
maximum, minimum, average, and standard 
deviation values most recently calculated by the 
logger (if you have selected the fixed logging mode 
in the app and have selected each statistic; see 

Statistics Logging

).  

 

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 
(you must reconfigure the logger 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 counts down in 
days, hours, minutes, and seconds until logging 
begins. In this example, 5 minutes and 38 seconds 
remain until logging begins. 

 

The configured 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 remains 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 is 
recorded at the faster interval, but the sensor readings 
are updated on the screen only every 15 seconds. 

 

When the logger has stopped logging, the LCD screen 
remains on and displays “STOP” until the logger is 
offloaded to your mobile device (unless the logger is 
configured with the “Show LCD” option disabled). Once 
the logger has been offloaded, the LCD turns off 
automatically after 2 hours. The LCD turns 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 from 
www.onsetcomp.com/products/software/hoboconnect.

 

2.

 

Install the batteries.

 Open the battery door on the back of 

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 

tile in the app to connect to it.  

Summary of Contents for MX1101

Page 1: ...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 Blueto...

Page 2: ...taneously 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 sil...

Page 3: ...ing 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 r...

Page 4: ...u can then filter the list of devices to show only loggers marked as favorites Make the logger beep one time to help you locate it HELLO also appears on the LCD when the logger is paged Update the fir...

Page 5: ...d 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...

Page 6: ...ns to fixed mode logging every 5 minutes Note Sensor alarms statistics and the Stop Logging option Never Stop Overwrites Old Data are not available in burst logging mode To set up burst logging 1 Tap...

Page 7: ...or a minute and use the 12 samples to record the resulting statistics at each 1 minute logging interval Note that the faster the sampling rate the greater the impact on battery life Because measuremen...

Page 8: ...ation 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 grou...

Page 9: ...his 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...

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