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Texas Weather Instruments Weather Report WR-25, Instruction Manual

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Texas Weather Instruments Weather Report WR-25 Instruction Manual Download Page 20

Texas Weather Instruments, Inc.                         

20

  

                        

WR-25 Instruction Manual

the windspeed output to the RS-232 port is an instant reading rather than a one minute
average.

To turn on the desired control options via the weather station display, refer to the table
below, add up the values of the controls that should be turned on and enter that value
into the weather instrument via the print set function (see page 13).  The default value is
224.  For example if you wanted AM PM turned on and instant wind speed output
turned on you would add 32+128 which equals 192.  Enter 192 into the weather
instrument via the print set function.

Option

Value

Knots on

16

AM PM on

32

Aux disable on

64

Instant wind speed on

128

   total

You may also change these functions via the software program TWI_LOG F5 routine

RS-232  Interface

RS-232  Interface

The pin out on the RS-232interface is as follows:

.

DE 9 Plug

Header

Pin 1

Pin 1 . . . 

Pin 2

Pin 3 . . . 

Receive Data

Pin 3

Pin 5 . . . 

Transmit Data

Pin 4

Pin 7 . . . .

Data Set Ready

Pin 5

Pin 9 . . .

Signal Ground

Pin 6

Pin 2 . . .

Data Terminal Ready (must be true to send data)

Pin 7

Pin 4 . . .

Clear to Send

Pin 8

Pin 6 . . .

Request Send

Pin 9

Pin 8 . . .

Modem Installation

A modem may be used with the WR-25 for remote operations.  A modem
adapter which is available from TWI must be used to properly connect the
weather station to a modem.  For auto answering, an auto-answering modem
with non-volatile memory must be used.  The WR-25 does not send AT control
signals, so in order for the modem to properly answer, the modem must be told
(programmed with a computer) to answer on whichever ring the user desires.

Summary of Contents for Weather Report WR-25

Page 1: ...oor and outdoor indicator lights are extinguished Aux temperature is displayed 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 When wind speed exceeds 99 miles per hour a small green light will turn on between the ...

Page 2: ...t wires that must be strung from the wind sensor to the console The wind direction sensor is calibrated at the factory and should be installed with the mounting arm pointed to the North The wind sensor arm can be mounted and calibrated in any direction but it is more convenient to use North as a reference If calibration is necessary after the unit is already mounted pick a calm day or immobilize t...

Page 3: ...t under the wind sensor Again we suggest at least a ten foot mast to overcome the artificially high readings generated by a hot roof The rain collector is normally mounted on the mast It should be mounted as low as possible 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 collector unencumbe...

Page 4: ...xas Weather Instruments Inc 4 WR 25 Instruction Manual Report Hold Windchill Hold Comfort Hold Last Hold Select Clear Min Max Scale Barometer Humidity Rainfall Average Date Time Weather Report Temperature ...

Page 5: ...ese functions since the last time the unit memory was 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 the minimum key but with maximum readings Scale The scale key changes the displays from reading in English values to t...

Page 6: ...e of the last rainfall and its rainfall rate When pressed at the same time as the clear key the instrument clears the term rainfall register When last pressed at the same time as select the unit enters into rainfall history mode Average When toggled on the dot below the Av light near the wind speed display indicating that the unit is in wind averaging mode When in wind averaging mode the instrumen...

Page 7: ...e Date Temperature Barometer Humidity Rainfall WEATHER REPORT Clear Minimum Select Maximum Scale Hold Last Hold Comfort Hold Windchill Hold Report 90 Press select a second time and the month will be displayed i e 1 Jan and 12 Dec Press the maximum and minimum key to set the month Report Hold AM PM 12 Press select a third time and the day of the month 1 31 digits light Press the maximum to advance ...

Page 8: ...eport Hold AM PM 23 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 Hold AM PM 42 Press select a seventh time note only the right two digits the unit will display seconds Press the maximum or minimum buttons to set the seconds note the seconds is updated on the display only when the maximum or mini...

Page 9: ... the peak of the cycle hour usually high tide will be displayed Change as desired Report Hold AM PM 09 Press select an eleventh time 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 AM PM 31 Press select a twelfth time and the unit will return to normal display mode Calibration mode See the calibration re...

Page 10: ...old Windchill Hold Report 76 Press select a second time and the unit displays the indoor temperature Press the maximum or minimum key to enter the actual temperature Windchill Hold 73 Indoor Outdoor Press select a third time the unit displays the outdoor temperature Press the maximum or minimum key to enter the actual temperature Windchill Hold 28 Indoor Outdoor Press select a fourth time and the ...

Page 11: ...ime the unit displays wind direction Press the maximum or minimum 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 humidity hold to enter this mode The first number to appear is the voltage at 0 humidity that the sensor outp...

Page 12: ... ON 6 OFF OFF ON 7 ON ON ON When rain rate is off term rain is substituted Press select a fourth time to select the baud rate of the serial output Press the maximum and minimum keys to change the display Press select a fifth time to select log interval hours The log interval tells the Weather Report to send data to the internal memory and at what interval to do so Press the maximum or minimum to c...

Page 13: ...ent by computers with ASCII space delimited text Command Characters V Firmware version number S Firmware Serial I Unit ID number C Unit responds with a daily minimum and maximum of all parameters then clears The rainfall rate is present rather than term rain Sample MIN 07 24 90 SW 00MPH 070F 067F 067F 054 30 00 00 19 D 01 38 M 00 00 R MAX 07 24 90 SSE 25MPH 052F 071F 092F 099 30 06 00 19 D 01 38 M...

Page 14: ...00 19 D 01 38 M 11 78 T r Unit responds with current conditions The term rain is present rather than the rainfall rate Note in 30 04F the F denotes falling pressure a S character denotes steady pressure Sample 5 15 07 24 90 SSE 04MPH 052F 069F 078F 099 30 04F 00 19 D 01 38 M 00 72 R K Unit responds with current calculated values for dew point Windchill and heat index Twi_Log Program The TWI_LOG pr...

Page 15: ...ntified as green It is set up on com 1 at 2400 baud no parity eight data bits and one stop bit BIN DSO CD0 and CS0 are various configuration parameters that must be in the string The TWI station is configured as a remote unit A modem would be connected to com1 set at 2400 baud no parity 8 data bits and one stop bit The ATE0QV1M1X4S0 0 is the modem configuration string required by this particular m...

Page 16: ...two files written on to your drive log_day and log_rec Log_day has the minimum and maximum values and log_rec has the individual records Each file has a file extenuation that corresponds to the ID number of each weather unit The ID number can be changed through the calibration F5 routine in Twi_Log For example if you downloaded data from a unit with the ID of 124 the data for that unit would be fo...

Page 17: ... report interval LO 34 1 Time dispaly AMPM 16 0 report Min Max Off 35 1 aux Temp 17 4 report end of day 36 1 Wsp Wdir 18 0 report interval Units M S 37 4 baud rate 2400 19 0 report character r 38 enter parameter index Note This screen and its index numberswill vary depending on what options are installed Any item in this index can be changed by 1 entering the index number 2 entering the new value ...

Page 18: ...dnesday 5 Thursday 6 Friday 7 Sunday 24 Sets hours in 24 hour format 25 Sets minutes 26 Sets Seconds 27 Sets the logging interval hours saves data in the units memory when set 28 Sets the logging interval minutes 29 0 for English or 1 for Metric scale 30 Sets the ID number 0 through 255 31 Displays number of power ups 0 through 255 32 Displays the rainfall rate interval in minutes 33 Wind Speed sc...

Page 19: ... to the DOS prompt For automatic data retrieval of multiple units at a predetermined time a commercial PC scheduling program may be use You may look at data that is stored on disk even if you are not tied directly to that weather station by entering TWI_LOG ixxx where xxx equals the ID number of the unit the unit ID may be set using the F5 function key within TWI_LOG At the DOS prompt TWI_LOG I135...

Page 20: ...d on 128 total You may also change these functions via the software program TWI_LOG F5 routine RS 232 Interface RS 232 Interface The pin out on the RS 232interface is as follows DE 9 Plug Header Pin 1 Pin 1 Pin 2 Pin 3 Receive Data Pin 3 Pin 5 Transmit Data Pin 4 Pin 7 Data Set Ready Pin 5 Pin 9 Signal Ground Pin 6 Pin 2 Data Terminal Ready must be true to send data Pin 7 Pin 4 Clear to Send Pin 8...

Page 21: ...at 300 to 19 2 baud rate 8 data bits no parity and one stop bit Note The WR 25 has two separate minimum and maximum memories Clearing the M command minimum and maximum memory will not affect the C command minimum and maximum memory and vice versa The printer computer memories clear at 12 00 midnight every day and or when the c key is pressed on the computer console Calibration Reference The Weathe...

Page 22: ... two stainless steel screws Setting 0 turns the rainfall counter off Setting 1 or 2 tells the WR 25 to react with one count for every momentary switch closure of the rain collector Setting 3 tells the WR 25 to react with one count for every rain collector switch transition from an open or closed state Rain inc value tells the WR 25 how much rainfall to display for each count Use the TWI_LOG F5 cal...

Page 23: ...form feed character at midnight which is normally desirable if a printer is directly hook up to the RS 232 interface Rainfall rate when selected outputs rainfall rate instead of term rain in the report function Special Key Functions Select Report Time Set Function Select Scale Calibration Set Function Select Average Printer Set Function Select Humidity Hold Humidity Calibration Set Clear Last Clea...

Page 24: ...ressed and held the unit will display the date and time the instrument s memory was last cleared In order to clear the memories the clear and minimum button must be pushed at the same time The items cleared are as follow minimum and maximum wind speed temperature indoor outdoor and aux barometric pressure and humidity Daily rainfall is cleared automatically at midnight every night Monthly rainfall...

Page 25: ... 6 8 10 1 3 5 7 9 RS232 10 pin header RS232 pig tail Note strip must be on the left side 75 amp fuse Figure 2 3 2 1 Power LED Wind Speed Yellow Aux solar and Indoor temperature Red Either jack if installed Outdoor temperature humidity and rain Blue Either jack if installed ...

Page 26: ...installation If this equipment does cause interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try and correct the interference by one or more of the following measures Reorient or relocate the receiving antenna of the affected radio or television Increase the separation between the equipment and the affected receiver C...

Page 27: ...k of the unit are properly seated and that sensor wires are on their proper junctions and secure see to Figure 2 Try unplugging then replugging the transformer to reset the weather station Check the fuse in the back of the instrument If it feels hot replace with a 75 amp fuse available at most electronic stores Humidity reads 0 during the day If your humidity sensor is in a plastic box make sure t...

Page 28: ...ll history register 17 daily rainfall register 21 day 17 Dewpoint 22 F FCC RADIO FREQUENCY INTERFERENCE STATEMENT 25 FUNCTION KEYS 4 H Hold 4 hours 17 Humidity Sensor Calibration 10 20 humidity sensor calibration factor 16 I ID number 17 Inside temperature calibration 16 INSTALLATION 2 L Last 5 logging interval hours 17 logging interval minutes 17 Lunar Tide Cycle 22 lunar tide cycle 4 M Maximum 4...

Page 29: ...ort output interval HI 17 Report output interval LO 17 RS 232 12 19 20 21 22 S Scale 4 17 Seconds 17 Select 4 Special Key Functions 22 T Temperature 20 temperature humidity sensor 2 Term rainfall history register 17 tide clock 23 Time display 17 Time Setting Mode 6 Trend indicators 1 twi_com dat 13 TWI_LOG 13 20 W Wind direction calibration 16 Wind Speed scale 17 Windchill 5 13 Y years 17 ...

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