Texas Instruments WRL-10 instruction manual Installation, Weather Report Logger

WRL

Weather Report Logger

The WRL senses wind, temperature, humidity, barometric pressure, rainfall and time, then outputs this data via a RS-232 interface to other devices. The WRL can be programmed to output current weather, along with minimum and maximum conditions for the day. The WRL keeps track of two different minimum and maximum values and up to 8000 lines of data (depending on memory size) in its non-volatile memory clock. The WRL-10 has 2K of memory and will retain approximately 30 lines of data. The WRL-32 has 32K of memory and will retain approxomately 2000 lines of data. The WRL-128 has 128K of memory and retains about 8000 lines of data. All functions of the WRL can be controlled through its RS- 232 interface.

Included with the standard WRL system is a wind direction and speed sensor, a pagoda mounted temperature/humidity sensor, a rain collector and a pressure sensor installed in the display console. Options include solar radiation, lightning and leaf wettness sensors.

Normal Operation

When in normal operation (no buttons depressed) the instrument displays current wind direction and speed, cycles current time and date, cycles current indoor, outdoor temperature. In addition, if selected, the optional solar radiation or aux temperature is displayed when both the indoor and outdoor indicator lights are extinguished. The unit also cycles current barometric pressure, current relative humidity, and cycles daily, monthly and term cumulative rainfall. By utilizing the hold buttons associated with each display, the user may select the most important readings to the user. During wind speeds in excess of 99 miles per hour a small light turns on between the digits of the wind speed display.

Trend indicators (arrows) are located to the right of the temperature, relative humidity, and barometric pressure displays. If, for example, the current relative humidity is increasing then the up trend arrow appears on. If there is no change in humidity, then the arrow would not appear.

Installation

The standard WRL uses three sensors to gather weather data. The wind direction and speed sensor, the temperature and humidity pagoda and the rain collector (see figure 1). All are designed to mount to a television type mast (not provided). The cables from the sensors go into a junction box, where they connect via RJ45’s to two multi-wire cables (intermediates) that are routed into the building and attached to the console. All cables are color-coded. The yellow wind sensor cable plugs into the yellow RJ45 connector in the junction box. The yellow intermediate (wind) also plugs into a yellow RJ45 connector in the junction box. Plug the temperature/humidity pagoda and the rain collector (both colored blue) and the blue intermediate into the blue RJ45 connectors in the junction box. You may place any blue cable into any blue RJ45 connector, the order does not matter.

Texas Weather Instruments, Inc. 1 WRL Instruction Manual