User manual LA CROSS TECHNOLOGY WT-3131A

[. . . ] These physicists have created an international standard, measuring a second as 9, 192, 631, 770 vibrations of a Cesium-133 atom in a vacuum. For more information about WWVB please see the NIST website at http://www. boulder. nist. gov/timefreq/stations/wwvb. htm DETAILED SET UP GUIDE 1. Battery Installation There are two locations for batteries on the clock a. The analog clock requires one AA battery for operation b. [. . . ] Weather Forecast The weather forecasting feature is estimated to be 75% accurate. The weather forecast is based solely upon the change of air pressure over time. The WT-3131A averages past air-pressure readings to provide an accurate forecast, creating a necessity to disregard all weather forecasting for 12-24 hours after the unit has been set-up, reset, or moved from one altitude to another (i. e. from one floor of a building to another floor). In areas where the weather is not affected by the change of air pressure, this feature will be less accurate. Weather Icons There are 3 possible weather icons that will be displayed in the FORECAST LCD: Sunny--indicates that the weather is expected to improve (not that the weather will be sunny). Sun with Clouds--indicates that the weather is expected to be fair (not that the weather will be sunny with clouds). Clouds with Rain--indicates that the weather is expected to get worse (not that the weather will be rainy). The weather icons change when the unit detects a change in air pressure. The icons change in order, from "sunny" to "partly sunny" to "cloudy" or the reverse. It will not change from "sunny" directly to "rainy", although it is possible for the change to occur quickly. If the symbols do not change then the weather has not changed, or the change has been slow and gradual. Other possible displays in the FORECAST LCD are 2 weather tendency arrows, one that points up (on the left side of the LCD) and one that points down (on the right side of the LCD). These arrows reflect current changes in the air pressure. An arrow pointing up indicates that the air pressure is increasing and the weather is expected to improve or remain good. An arrow pointing down indicates that the air pressure is decreasing and the weather is expected to become worse or remain poor. No arrow means the pressure is stable. 4 2. Indoor Temperature and Humidity The current indoor temperature (viewed on the left) and relative humidity (viewed on the right) are displayed in the INDOOR LCD. These measurements are taken within the clock. Fix a screw (not included) into the desired wall, leaving approximately 3/16 of an inch (5mm) extended from the wall. Place the indoor weather station onto the screw using the hanging hole on the backside. Gently pull the indoor weather station down to lock the screw into place. [. . . ] LA CROSSE TECHNOLOGY WILL NOT ASSUME LIABILITY FOR INCIDENTAL, CONSEQUENTIAL, PUNITIVE, OR OTHER SIMILAR DAMAGES ASSOCIATED WITH THE OPERATION OR MALFUNCTION OF THIS INDOOR WEATHER STATION. THIS PRODUCT IS NOT TO BE USED FOR MEDICAL PURPOSES OR FOR PUBLIC INFORMATION. This warranty gives you specific legal rights. You may also have other rights specific to your State. [. . . ]