La Crosse Technology WS-7213U Instruction Manual - page 6
Problem: Temperatures do not match if units are placed next to each other.
Solution: Each temp/humidity sensor is manufactured to be accurate to within 2 degree plus or minus and under normal conditions. It is possible for
two temp/humidity sensors to be as much as 4 degrees different. The difference can be exaggerated further because the temp/humidity sensors are
designed for different working environments. The indoor sensor is less responsive to ambient air currents because of the shielding effect of the indoor
weather station’s case. In addition, the casing can act as a heat sink to absorb and store heat from external sources (i.e. handling of the case or radiant
heat). In addition, the much greater range of the outdoor temp/humidity sensor requires a different calibration curve than the indoor range. Error is
usually greater at the extreme ends of a range, making it harder to compare different ranges with different curves. Under non-laboratory conditions, it
is difficult to compensate for the above factors and obtain an accurate comparison.
MAINTENANCE AND CARE INSTRUCTIONS
•
Extreme temperatures, vibration, and shock should be avoided to prevent damage to the units.
•
Clean displays and units with a soft, damp cloth. Do not use solvents or scouring agents; they may mark the
displays and casings.
•
Do not submerge in water.
•
Do not subject the units to unnecessary heat or cold by placing them in the oven or freezer.
•
Opening the casings invalidates the warranty. Do not try to repair the unit. Contact La Crosse Technology for
repairs.
SPECIFICATIONS
Transmitting Frequency
433MHz
Measuring Range - Temperature
Indoor Weather Station: Indoor
32
°F to 140°F with 0.1°F resolution.
Indoor Weather Station: Outdoor
-21.8
°F to 139.8°F with 0.1°F resolution.
Temp accuracy
+/- 1
°F
Measuring Range – Humidity
Indoor Weather Station:
20% to 95% with 1% resolution (“—“ displayed when outside this range)
Temperature Checking Interval
Indoor:
Every 10 seconds
Outdoor:
Three times in 10 minutes
Humidity Checking Interval
Outdoor:
Three times in 10 minutes
Transmitting range:
Maximum 80 feet (25m) open space
Batteries—(Alkaline recommended)
Remote Temp/Humidity Sensor
2 x AA, 1.5V
Indoor Weather Station
2 x AA, 1.5V
Dimensions: (H x W x D)
Indoor Weather Station
7.5” x 3” x 1.12”
(excluding table stand) (190 x 76 x 28 mm)
Remote Temp/Humidity Sensor
4.33” x 1.57” x 0.78”
(110 x 40 x 20 mm)
Rain Protector
2.25”Ø x 4.75” high
(57 mm
∅ x 120 mm high)
Battery life
Approximately 1 year