Installation Guide

WS-8418U-IT www.lacrossetechnology.com/support Page | 4
Low
Battery
Icons
Note: With the moon shown against a light colored background, the
phases will show opposite to a paper calendar. The segments that are
highlighted will portray the part of the moon that is lit. For instance, the
moon will be blank during a new moon and dark during a full moon.
Low Battery Icon
 When the TX icon is displayed replace batteries in
the outdoor sensor.
 When the RX icon is displayed replace batteries in
the atomic clock.
Position Outdoor Sensor
 Mount the outdoor sensor on a north-facing wall or in any well
shaded area. Under an eave or deck rail is preferred.
 The maximum transmitting range to the atomic clock is over 330 feet
(100 meters) in open air, not including walls.
Restart
If the outdoor temperature shows dashes, remove batteries from the
atomic clock and outdoor sensor. Press any button on the atomic clock
20 times. After 15 minutes, return to Step 1 in “Get Started”.
Specifications
Indoor
Temperature
Range
14.1°F to +100°F (-9.9ºC to +37.8ºC)
Outdoor
Temperature
Range
-39.8°F to +139.8°F (-39.8ºC to +59.9ºC)
Distance
Over 330 ft. (100 meters) RF 915MHz (open air)
Interval
About every 4 seconds
Power
Atomic Clock
2-AA, IEC, LR6 batteries (not included)
TX37U-IT Sensor
2-AA, IEC, LR6 batteries (not included)
Battery Life
Atomic Clock
Over 24 months
TX37U-IT Sensor
Over 12 months
Dimensions
Atomic Clock
10.25“ x 1.16“ x 9.74“ (260.6 x 29.5 x 247.5mm)
TX37U-IT Sensor
5.05” x 1.50” x 0.83” (128.3 x 38.2 x 21.2 mm)