Oregon Scientific WMR90A User Manual
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EN
Memory
Current, min and max
Alarm
Hi / Lo
RADIO-CONTROLLED / ATOMIC CLOCK
Synchronization
Auto or disabled
Clock display
HH:MM:SS
Hour format
12hr AM/PM or 24hr
Calendar
DD/MM or MM/DD
Weekday in 5
(E, G, F, I, S) languages
Battery
4 x UM-3 (AA) 1.5V batteries
AC adapter
6V
REMOTE WIND SENSOR UNIT
Weight
556 g (1.23 lbs) without battery
Wind speed unit
m/s, kph, mph, knots
Speed accuracy
2 m/s ~ 10 m/s (+/- 3 m/s)
10 m/s ~ 56 m/s (+/- 10%)
Direction accuracy
16 positions
Transmission of
Approx. every 14 seconds wind speed signal
Memory
Max speed gust
OUTDOOR TEMPERATURE
Temp. unit
°C / °F
Displayed range
-50°C to 70°C (-58°F to 158°F)
Operating range
-30°C to 60°C (-4°F to 140°F)
Accuracy
-20°C – 0°C: +/- 2°C (+/- 4.0°F)
0°C - 40°C: +/- 1°C (+/- 2.0°F)
40°C - 50°C: +/- 2°C (+/- 4.0°F)
50°C - 60°C: +/- 3°C (+/- 6.0°F)
Comfort
20°C to 25°C (68°F to 77°F)
Memory
Current, min and max temp. Dew Point w/ max
and min Wind chill temp. and min
RELATIVE HUMIDITY
Displayed range
2% to 98%
Operating range
25% to 90%
Resolution
1%
Accuracy
25% - 40%: +/- 7%
40% - 80%: +/- 5%
80% - 90%: +/- 7%
Comfort
40% to 70%
Memory
Current, min and max
RF TRANSMISSION
RF frequency
433MHz
Range
Up to 100 meters (328 feet) with no obstructions
Transmission
Approx. every 60 seconds
No. of Channel
1 for Wind/ Rain/ UV and 10 for Temp. / Humidity
Battery
4 x UM-3 (AA) 1.5V
REMOTE RAIN GAUGE
Dimensions
107 x 87 x 56 mm
(L x W x H)
(4.2 x 3.4 x 2.2 inches)
Weight
134 g (0.3 lbs) without battery
Rainfall unit
Mm/hr and in/hr
Range
0 mm/hr – 999 mm/hr
Resolution
1 mm/hr
Accuracy
< 15 mm/hr: +/- 1 mm
15 mm to 9999 mm: +/- 7%
Memory
Past 24hrs, hourly and accumulated from last
memory reset
Battery
2 x UM-3 (AA) 1.5V
ABOUT OREGON SCIENTIFIC
Visit our website (www.oregonscientific.com) to learn more about Oregon Scientific 
products. If you’re in the US and would like to contact our Customer Care department 
directly, please visit: www2.oregonscientific.com/service/support 
OR
Call 1-800-853-8883.
For international inquiries, please visit: www2.oregonscientific.com/about/international
FCC STATEMENT
This device complies with Part 15 of the FCC Rules. Operation is subject to the 
following two conditions: (1) This device may not cause harmful interference, and (2) 
This device must accept any interference received, including interference that may 
cause undesired operation.
 WARNING  Changes or modifications not expressly approved by the party responsible 
for compliance could void the user’s authority to operate the equipment.
 NOTE  This equipment has been tested and found to comply with the limits for 
a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are 
designed to provide reasonable protection against harmful interference in a residential 
installation.
This equipment generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause harmful interference 
to radio communications. However, there is no guarantee that interference will not 
occur in a particular installation. If this equipment does cause harmful interference to 
radio or television reception, which can be determined by turning the equipment off 
and on, the user is encouraged to try to correct the interference by one or more of the 
following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the 
 receiver is connected.
• Consult the dealer or an experienced radio / TV technician for help.
DECLARATION OF CONFORMITY
The following information is not to be used as contact for support or sales. Please call 
our customer service number (listed on our website at www.oregonscientific.com or 
on the warranty card for this product) for all inquiries instead.
We
Name: 
Oregon Scientific, Inc.
Address:
19861 SW 95th Ave., Tualatin, Oregon 97062 USA
Telephone No.:
1-800-853-8883
declare that the product 
Product No.: 
WMR90A
Product Name:
Advanced Weather Station with Wireless Sensor Set
Manufacturer:
IDT Technology Limited
Address:
Block C, 9/F, Kaiser Estate, Phase 1,41 Man Yue St.,
Hung Hom, Kowloon, Hong Kong
is in conformity with Part 15 of the FCC Rules. Operation is subject to the following 
two conditions: 
1. This device may not cause harmful interference. 
2. This device must accept any interference received, including interference that 
 may cause undesired operation.