Oregon Scientific RMR203HGA Leaflet

Page of 2
Temperature and Humidity Station 
with Atomic Time
Model: RMR203HGA
USER MANUAL
 EN
OVERVIEW
FRONT VIEW (FIG 1) 
1.  Remote sensor reception indicator
2.  Clock signal reception indicator
3.  MODE: Change settings / display
4.  LIGHT: Activate backlight for 5 seconds
5. 
  / 
:  Increase  /  decrease  settings;  activate  / 
deactivate clock reception signal
6.  Outdoor temperature and humidity 
 Wireless sensor included does not include humidity.  
To receive outdoor humidity you need a wireless sensor with 
the humidity function.
7.  Indoor temperature and humidity
8.  Time zone
9.  Clock with weekday
10.  MEM: View current, maximum, minimum temperature / 
humidity
11.  Ice alert LED indicator
BACK VIEW (FIG 2)
1.  °C / °F: Select temperature unit
2.  RESET: Reset unit to default settings
REMOTE SENSOR (FIG 3) 
1.  LED status indicator
2.  Wall mount hole
3.  Battery compartment
4.  RESET hole 
5.  CHANNEL switch
GETTING STARTED
INSERT BATTERIES
1.  Remove the battery compartment.
2.  Insert the batteries, matching the polarities (see FIG 2).
 LOCATION   MEANING
Clock / alarm 
Main unit batteries low
Outdoor temperature   Sensor batteries low
and humidity area
REMOTE SENSOR
The main unit can collect data from up to 3 sensors.
To set up the sensor:
1.  Open the battery compartment (see FIG 3).
2.  Select a channel then press RESET
3.  Close the battery door.
4.  Place  the  sensor  within  30  m  (98  ft)  of  the  main  unit 
using the table stand or wall mount.
  TIP    Ideal  placements  for  the  sensor  would  be  in  any 
location on the exterior of the home at a height of not more 
than 5 ft and which can shield it from direct sunlight or wet 
conditions for an accurate reading.
 Use alkaline batteries for longer usage and consumer 
grade lithium batteries in temperatures below freezing.
SENSOR DATA TRANSMISSION
To search for a sensor: 
Press and hold 
 + MODE simultaneously.
The sensor reception icon in the remote sensor area shows 
the status:
ICON 
DESCRIPTION
   
   
Main unit is searching for sensor(s).
   
A channel has been found.
   
The sensor cannot be found. 
  TIP   The transmission range may vary depending on many 
factors. You may need to experiment with various locations 
to get the best results.
CLOCK 
CLOCK RECEPTION
This product is designed to synchronize its clock automatically 
with  WWVB-60  signal,  within  3200km  (2000  miles)  of  Fort 
Collins Colorado.
To enable / disable signal reception:
Press  and  hold 
  to  enable  or 
  to  disable  signal 
reception.
 Reception takes 2-10 minutes. If the signal is weak, 
it  can  take  up  to  24  hours  to  get  a  valid  signal.  If  signal 
reception is unsuccessful, place your unit next to a window, 
press and hold 
 to force another signal search.
Clock signal reception indicator:
  STRONG SIGNAL  WEAK SIGNAL  NO SIGNAL
MANUALLY SET CLOCK
To set the clock manually, disable the signal reception first.
1.  Press and hold MODE.
2.  Press 
 or 
 to change the settings.
3.  Press MODE to confirm.
4.  The settings order is: time zone, 12/24 hr format, hour, 
minute,  year,  calendar  mode  (day  –  month  /  month  – 
day), month, day and language.
Select the time zone: (P) Pacific, (E) Eastern, (C) Central or 
(M) Mountain.
 The language options are English (E), German (D), 
French (F), Italian (I), and Spanish (S).
To select display mode:
Press  MODE  to  choose  between  clock  with  seconds  / 
weekday / calendar.
TEMPERATURE AND HUMIDITY
To toggle temperature unit:
Press °C / °F.
To auto-scan between sensors:
Press  and  hold 
  +  MEM  to  display  each  sensor’s  data 
for 3 seconds. 
To end press 
 .
To  toggle  between  current,  minimum  and  maximum 
records for the selected sensor:
Press MEM repeatedly.
To clear the records:
Press and hold MEM.
ICE WARNING 
If the channel 1 sensor falls between 3°C to 
-2 °C (37°F to 28°F), LED indicator will flash, and will stop 
flashing once the temperature is out of this range. 
BACKLIGHT
Press LIGHT to activate backlight for 5 seconds.
RESET
Press RESET to return to the default settings.
PRECAUTIONS
• 
Do not subject the unit to excessive force, shock, dust, 
temperature or humidity.
• 
Do not cover the ventilation holes with any items such as 
newspapers, curtains etc.
• 
Do not immerse the unit in water. If you spill liquid over 
it, dry it immediately with a soft, lint-free cloth.
• 
Do  not  clean  the  unit  with  abrasive  or  corrosive 
materials. 
• 
Do not tamper with the unit’s internal components. This 
invalidates the warranty.
• 
Only  use  fresh  batteries.  Do  not  mix  new  and  old 
batteries.
• 
Images shown in this manual may differ from the actual 
display.
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RMR203HGA_M_EN_R2.indd   1
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