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Texas Weather Instruments, Inc. 13 WRL Instruction Manual
Protect Mode
When the unit is in protect mode, scale, time setting, calibration and print set modes are
disabled. To enter or exit protect mode, press the select key for more than 10 seconds.
The WRL will display PPPP in the time and date window when the select key is depressed
while in protect mode.
Daylight Savings Mode
When enabled through the print set routine, the unit will automatically adjust the time to
correspond with daylight savings time. When daylight savings mode is enabled, two
decimal points will be displayed in the time/date window when the select key is pressed.
Operation via RS-232
The WRL via its RS-232 interface can communicate with computers running either the
TWICAL program, standard computer communication programs like Windows Hyperterm
or dedicated weather applications like WeatherView32. The WRL responds to the
following ASCII characters sent 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 000F 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 00.72"R
c- Unit responds with a daily minimum and maximum of all parameters, then clears. The
term rain is present rather than rainfall rate. (Note: use of the either c command will clear
the logged min/max.)
Sample
MIN 07/24/90 SW 00MPH 000F 067F 067F 054% 30.00" 00.19"D 01.38"M 00.00"T
MAX 07/24/90 SSE 25MPH 052F 071F 092F 099% 30.06" 00.19"D 01.38"M 00.72"T
The minimum and maximum associated with the C command is cleared automatically at
midnight
D- Unit responds in an identical manner as the C command but does not clear the system
memory.