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1-800-LOGGERS (564-4377) • 508-759-9500 

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©  2019  Onset  Computer  Corporation.  All  rights  reserved.  Onset,  HOBO,  and  HOBOlink  are  registered  trademarks  of  Onset 
Computer Corporation. All other trademarks are the property of their respective companies. 

This  product  has  been  manufactured  by  Onset  Computer  Corporation  and  in  compliance  with  Onset’s  ISO  9001:2015  Quality 
Management System. 

23807-B MAN-RX2100-QSG 

 

Plug in the battery and wait for the station 
to connect to HOBOlink. 

Note for RX2103 and RX2104 models:

 If you are using the 

water level sensor, make sure it is plugged in before 
powering up the station in this step. Otherwise, only 
barometric pressure will be logged. 

a.

 

Plug in the battery cable. For RX2102 and RX2104 models, 
plug in the solar panel cable for the built-in solar panel. 

 

b.

 

Once the battery cable is plugged in, “Initializing System” 
will flash on the LCD. A checkmark appears next to 
“System” after the station initialization is complete. 

c.

 

After the station powers up, it will connect to HOBOlink 
automatically within two minutes. The cellular icon and 
“Connection” will flash while the connection is underway. 
Once the connection is complete, a checkmark appears 
next to Last Connection. Note that the entire initialization 
process may take several minutes; wait until Last 
Connection and the checkmark appears before continuing 
to step 9. 

 

 

 

Configure the station in HOBOlink. 

In HOBOlink, click Devices, then RX Devices, and click the 

 

icon next to your station. Make changes and click Save on 
each screen as you configure the following: 

 

General system settings (nickname, time zone, and 
image) 

 

Readout settings (connection interval and night mode) 

 

Smart sensor logging and sampling interval 

 

Settings for each smart sensor (e.g. labels, graph, and 
scaling) 

Important for RX2103 and RX2104 models:

 Do not 

configure the water level and water flow channels yet. Set 
the logging and sampling interval for the water level 
sensors module and optionally add labels, scaling, or 
enable graphing. Continue to step 10 to start logging and 
then obtain a water reference level reading in step 11 
before configuring water level and water flow. 

 

10 

Start Logging. 

Press the Start button on the station to start logging. The 
station will connect to HOBOlink and then logging will begin. 

If you are not using a water level sensor, then the setup is 
complete. Measurements are uploaded to HOBOlink each 
time the device connects. Go to www.hobolink.com and click 
Help for details on checking the latest conditions, setting up 
dashboards, exporting data, and more. 

11 

Obtain a reference water level reading 
(RX2103 and RX2104 models). 

Make sure the water level sensor is deployed in its final 
location and that the station is logging. Take a reference level 
reading, measuring the water level from the desired 
reference point. 

Important:

 Note the reference level reading as well as the 

date and time it was taken. 

12 

Configure water level, water flow channels 
in HOBOlink (RX2103 and RX2104 models). 

Perform the following steps in the field in HOBOlink with a 
mobile device to verify that the system is logging the water 
level correctly while you are still at the station site. 

a.

 

In HOBOlink, click Devices, then RX Devices, and click the 

 icon next to your station. 

b.

 

Under the water level sensors module in the Configuration 
menu, select Water Level. 

c.

 

Click the checkbox to Enable Channel. 

d.

 

Click the checkbox to Enable Graph. Type a label (optional). 

e.

 

Enter the reference water level and date and time noted in 
step 11. 

 

If the water level surface is 

below

 the reference point, 

enter the reference water level as a negative number. 

 

If the water level surface is 

above

 the reference point, 

enter the reference water level as a positive number. 

f.

 

Select the appropriate water density. 

g.

 

Click Save. 

If you are configuring water flow and using one of the 
supported weir or flume types, follow steps h–l. 

h.

 

Select Water Flow from the Configuration menu. 

i.

 

Click the checkbox to Enable Channel. 

j.

 

Click the checkbox to Enable Graph. Type a label (optional). 

k.

 

Choose the measurement method for water flow and 
enter the appropriate information for the method 
selected. 

l.

 

Click Save. 

Water level and flow data will be calculated starting with the 
next connection to HOBOlink. If you don’t want to wait for 
the next scheduled connection, press the Cloud button on 
the station LCD to connect to HOBOlink immediately. Note 
that the reference water level information entered in this 
step will not affect any previously logged data. 
Go to www.hobolink.com and click Help for details on 
checking the latest conditions, setting up dashboards, 
exporting data, and more. 

 

For additional information:

 

See the HOBO MicroRX 

Station Manual for specifications and detailed operation, 
including deployment and mounting guidelines, and more 
information on water level sensor configuration. Go to 
www.onsetcomp.com/support/manuals/23808-rx2100-manual 
or scan the code at left. 

 

Connect the 
battery cable here 

Plug in the solar 
panel here (RX2102 
and RX2104) 

A checkmark 
appears next to 
Last Connection 
after connecting 
to HOBOlink 

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