Oregon Scientific RMR391PU User Manual

4

EN

1.  Slide open the battery compartment.
2.  Slide channel switch to select channel 1.
3.  Insert the battery, matching the polarities.
4. Press 

RESET after each battery change.

5.  Close the battery compartment.
6.  Place the sensor within 30 m (98 ft) of the main unit 

using the table stand or wall mount.

The transmission range may vary depending on many 
factors. You may need to experiment with various 
locations to get the best results.

 NOTE  We recommend that you use alkaline batteries 
with this product for longer usage and consumer grade 
lithium batteries in temperatures below freezing.

Outdoor sensor:
The main unit will automatically search for the outdoor 

sensor. The sensor reception icon in the remote sensor 
area shows the status:

DESCRIPTION
Main unit is searching for
sensor(s)
A channel has been found

The sensor cannot be 
found.

 NOTE  If the sensor is not found, check the batteries, 
obstructions, and remote unit location.
For best results:

•   Place  the  sensor  out  of  direct  sunlight  and 

moisture.

•   Position  the  sensor  so  that  it  faces  the  main  unit, 

minimizing obstructions such as doors, walls and 
furniture.

•   Place the sensor in a location with a clear view to 

the sky, away from metallic / electronic objects.

•   Position  the  sensor  close  to  the  main  unit  during 

cold winter months as below-freezing temperatures 
may affect battery performance and signal 
transmission.

 TIP  Ideal placements for the sensor would be in any 
location on the exterior of the home at a height of not 
more than 1.5 m (5 ft) and which can shield it from direct 
sunlight or wet conditions for an accurate reading.