Texas Instruments WRL-10 User Manual

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WRL

Weather Report Logger

The WRL senses wind, temperature, humidity, barometric pressure, rainfall and time, then outputs this data via a RS-232interface 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 itsnon-volatilememory clock. TheWRL-10has 2K of memory and will retain approximately 30 lines of data. TheWRL-32has 32K of memory and will retain approxomately 2000 lines of data. TheWRL-128has 128K of memory and retains about 8000 lines of data. All functions of the WRL can be controlled through its RS232 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 twomulti-wirecables (intermediates) that are routed into the building and attached to the console. All cables arecolor-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.

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There is lightning protection (transient voltage suppressers) built into the junction box. It is very important that the mast is grounded or else the transient voltage suppressers will not protect your instrument. The junction box picks up earth ground through the hose clamps mounting the box. We suggest that you install a copper-groundingrod (available at Radio Shack) and run the heavy gauge wire directly behind the hose clamps of the junction box. This arrangement will ground your mast and your junction box.

C A U T I O N !! :BE EXTREMELY CAREFUL NOT TO TOUCH ANY HIGH POWER LINES DURING INSTALLATION OF THE VARIOUS SENSORS!!!

The wind direction and speed sensor is normally mounted on television type antenna masts (see Figure 1). For best results the wind sensor should be mounted twenty feet above the roof of the building. Higher installation yelds more accurate readings. There is one yellow cable that must be strung from the wind sensor to the console via the junction box. The wind direction sensor is calibrated at the factory and should be installed with the wind sensor arm pointed to the North. The wind sensor can be mounted in any direction and recalibrated via the WRL console, but it is more convenient to use the precalibrated North reference. If calibration is necessary after the unit is already mounted, pick a calm day or immobilize the wind vane by hand and use calibraton mode to make these changes. The outside temperature/humidity pagoda should be mounted about two feet under the wind sensor. Again, we suggest atwenty-footmast for commercial installations to overcome the artificially high readings generated by a hot roof. Plug the temperature/humidity pagoda cable into the blue RJ45 connector in the junction box.

The rain collector is normally mounted on the mast. It should be mounted as low as possible both to reduce windage and to limit movement of the mast, which can cause false readings. The collector should be mounted in a manner that allows rain to enter the

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collector unencumbered by surrounding obstacles. Use a bubble level to make sure that the collector is perfectly level with the ground. Failure to level the collector will cause inaccurate rainfall readings. The rain collector has one blue cable, which must be connected to the console via the junction box.

Mount the junction box under the rain collector using the hose clamps that are installed on the box (see figure 1)and remove the front cover of the junction box. Next insert the connectors from the sensors and the cables from the console through the hole in the bottom of the junction box and then out the front of the box. Plug all the yellow connectors into the yellow RJ45 connectors and all the blue connectors into the blueRJ-45connectors and then pull the excess cable out of the junction box(j-box).Be sure and replace the rubber gasket on the junction box so that it can remain watertight.

Plug the yellow intermediate cable (wind) into the yellow pigtail exiting the back of the console. Do the same for the blue cable (temp/humidity & rain). Next, plug in the serial cable into the connector in the rear of the console and the proper serial port of your computer. If you are supplying your own serial cable, be sure that either you have a null modem adapter attached to the cable or that the cable is a null modem cable. The cable supplied with the WRL will have four connectors or will be marked with a green color on one of the cable connectors. Plug the wall transformer into a 120V wall socket to power up the unit.

The optional solar sensor must be pointed to the South and must be free of shadows created by the other sensors (Near the top of the mast is normally the best). Take care that the sensor is perfectly level. The solar sensor has one red cable. Run the red solar sensor cable to the junction box and plug it in to the red connector in the j- box. Run the red intermediate cable to the console and plug it into the j-box.

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OPERATION

 

Report

Date/Time

Hold

 

Windchill

Temperature

Hold

 

Comfort

Barometer/Humidity

Hold

Average

Last

Rainfall

Hold

Select Clear Min

Max Scale

Weather Report

FUNCTION KEYS

Select

The select key, when depressed at exactly the same time as thereport key, puts the unit into time/date and lunar/tide cycle set mode. When theselect andscale keys are depressed at exactly the same time, the unit enters the calibration set mode. When theselect andaverage keys are pressed at the same time, the unit enters the printer set mode. Whenselect andlast are depressed at exactly the same time the instrument enters rainfall history set. Whenselect andtime hold are pressed at exactly the same time the instrument enters logging mode. When theselect key is held for 10 seconds, the unit will enter or exit protect mode. Once the instrument is in its respective mode, theselect key is used to step through the different functions. If the unit is in protect mode, all of these functions are disabled

Clear

The clear key, when depressed, causes the unit to display the date and time of the last memory clear. Pressingclear andminimum at the same time clears the unit's memory. Pressingclear andmaximum at the same time also clears the unit's memory. Pressingclear andlast rain clears the term rainfall.

Minimum

The minimum key, when repeatedly depressed, steps throughwind-speed/wind-direction, temperature, barometric pressure, humidity and rainfall rate, displaying the minimum reading of each of these functions since the last time the unit memory was

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cleared. In addition to the minimum reading, the unit displays the date and time of its occurrence. The date and time display must not be on hold in order to display both date and time.

Maximum

The maximum key functions the same as theminimum key, but with maximum readings.

Scale

The scale key changes the displays from reading in English values to those of Metric values. The inch light near the rain display is on when the instrument is in English mode. The English to Metric equivalents are miles per hour or Knots to Kilometers per hour, Fahrenheit to Celsius, Inches of Mercury to Millibars, Inches of rain to Centimeters of rain. Pressing theselect andscale key at the same time puts the unit into calibration mode. If the unit is in protect mode, this function is disabled.

Report

Pressing the report key sends current data to the serial port. Thereport key, when depressed at the same time as theselect key, puts the unit into its time setting function. Pressing thereport key while in logging mode will send all data in memory from the currently displayed record forward to theRS-232port.

Hold

The hold key when depressed (toggled on) stops the cycling between two different parameters on the same display.

Windchill

The Windchill key, when depressed, calculates and displays, using wind speed and temperature, a factor that represents how cold the temperature and wind feel to bare flesh. Pressing thewindchill and thecomfort key at the same time will display the dew point.

Comfort

The comfort key, when depressed, calculates and displays, using humidity and temperature, a factor which represents how warm the temperature feels.

Last

The last key, when depressed, displays the time and date of the last rainfall and its rainfall rate. When depressed at the same time as the clear key, the instrument clears the term rainfall register. Whenlast is pressed at the same time asselect, the unit enters into rainfall history mode.

Average

When toggled on, the dot below the Av light (near the wind speed display), indicates that the unit is in wind averaging mode. When in wind averaging mode, the instrument displays the previous minute's average wind direction and speed. When depressing the average key and the select key at the same time, the unit enters into the printer set mode.

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¸Time Setting Mode:

Press select andreport at the same time, and the last two digits of the year displays (i.e., 90 = 1990). Press themaximum button to advance the year and theminimum button to retard the year. If the unit is in protect mode this function is disabled.

.

Report

Time/Date

Temperature

Hold

 

Windchill

9 0

Hold

Comfort

Barometer/Humidity

Rainfall

Hold

Last

Hold

Select

Clear Minimum Maximum Scale

WEATHER REPORT

Press select a again and the month will be displayed (i.e., 1 = Jan. and 12 = Dec.). Press themaximum andminimum key to set the month.

Report

Hold 12 - -

AM

PM

Press select a third time, and the day of the month(1-31)digits light. Press themaximum to advance the date andminimum to retard the date.

Report

- - .25

 

Hold

AM

PM

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Press select a fourth time, and the day of the week is displayed (1 = Sunday, 2 = Monday, 3 = Tuesday, 4 = Wednesday, 5 = Thursday, 6 = Friday, and 7 = Saturday. Press themaximum button to advance the day of the week andminimum to retard.

Report

Hold 04

AM

PM

Press select a fifth time (note the colon between the hours and minutes), and the unit will display the time in military hour style. Press themaximum button to advance the hour orminimum to retard the hour.

Report

Hold 23 :- -

AM

PM

Press select a sixth time (note the colon between the hours and minutes),and the unit will display minutes. Press the maximum or minimum buttons.

Report

- - .42PM

Hold

 

AM

Press select a seventh time (note only the right two digits); the unit will display seconds. Press the maximum orminimum buttons to set the seconds. (note: the seconds is updated on the display only when the maximum or minimum button is being depressed).

Report

 

22

AM

Hold

PM

Press select an eighth time (Note: a single dot at the bottom separates the hour and minute); the lunar/tide clock will display the number of hours in a cycle.

Press the maximum orminimum buttons to set the hours of the cycle (explained in the Lunar Tide section).

Report

12.- - PM

Hold

 

AM

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Press select a ninth time (Note: the single dot remains at the bottom, separating the hour and minute); the lunar/tide clock will display the minutes of the cycle. Press the maximum or minimum buttons to set the minutes of the cycle.

Report

- -.51PM

Hold

 

AM

Press select a tenth time (Note: the single dot is now located at the top, between the hour and minute); the peak of the cycle hour (usually high tide) will be displayed. Change as desired.

Report

Hold 09 ' - -

AM

PM

Press select an eleventh time (Note: the single dot remains at the top between the hour and minute), and the minutes of the peak hour will be displayed. Change as desired.

Report

Hold - - ' 3 1

AM

PM

Press select a twelfth time and the unit will return to normal display mode.

Calibration mode

See the calibration reference section for other details.

Calibration Method

Press select andscale at the same time, and the unit enters calibration mode. The unit first displays the Solar radiation calibration factor. If necessary, press themaximum orminimum key to enter the proper factor. This factor is located on the back of the instrument. When the unit is in protect mode, this function is disabled.

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Report

Time/Date

Temperature

Hold

 

Windchill

76

Hold

Comfort

Barometer/Humidity Hold

Last

Rainfall

Hold

Select

Clear Minimum Maximum Scale

WEATHER REPORT

Press select a second time; the unit displays the indoor temperature. Press themaximum orminimum key to enter the actual temperature.

Windchill

Indoor - -.73

Hold O utdoor

Press select a third time - the unit displays the outdoor temperature. Press themaximum orminimum key to enter the actual temperature.

Windchill

Indoor - -.28

Hold O utdoor

Press select a fourth time; the unit displays barometric pressure. Press themaximum orminimum key to enter the actual barometric pressure.

Comfort

29 .9 2

Hold

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Press select a fifth time; the unit displays 0, 1, 2, or 3 in the rainfall window. 2 is the normal display. Press themaximum orminimum key to enter the proper number(see calibration reference for more information).

Last

Hold

Daily

2

IInch

Monthly

Term

Press select a sixth time; the unit will display a reading ranging from .01 to .1 in the rainfall window. Press themaximum orminimum button to enter the proper number which is usually .01.

Last

Hold

Daily

.01

IInch

Monthly

Term

Press select a seventh time - the unit displays wind direction. Press themaximum orminimum key to enter the actual wind direction.

Press select an eighth time - the unit will return to the normal display mode.

Humidity Sensor Calibration

This function is only used if a new humidity sensor is installed. Press select and humidityhold to enter this mode. The first number to appear is the voltage at 0% humidity that the sensor outputs. Pressselect again and a second number will appear. This larger number is the voltage that the sensor outputs at 75% humidity. The humidity calibration numbers are found on the humidity/temperature sensor and on the back of the instrument console. These calibration numbers are supplied to us by the manufacturer of the sensor and are normally not changed. If the unit is in protect mode this function is disabled.

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