Texas Instruments WR-25 DE 9 Plug Header, Modem Installation, Typical Output, Computer Interface

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WR-25 Instruction Manual

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. (Modems pre-programmed in non-volatile memory are available from Texas Weather Instruments.)

Typical Output

Temperature

Daily Monthly Rainfall

Time Date Direction Speed Aux Indoor Outdoor

Humidity Pressure Rain Rain

Rate

15:15 07/24/90 SSE 04MPH 052F 069F 078F 099% 30.04S 00.19"D 01.38"M 00.72"R 15:30 07/24/90 SE 02MPH 065F 068F 072F 089% 30.04S 00.19"D 01.38"M 00.00"R 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 00.72"R

Computer Interface

The WR-25 may be plugged directly into computers equipped with RS-232interfaces. Data may be captured to disk by using a communication program (i.e., Crosstalk or Procomm for the IBM-PC) or the TWI_LOG program. The WR-25 sends data in a serial format 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.

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The Weather Report comes pre-calibrated from the factory, but it is possible to recalibrate most of the primary functions of the instrument using the F5 function of the TWI_LOG program.

Barometric Pressure

Texas Weather Instruments, Inc.

WR-25 Instruction Manual

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Contents Digital Weather Station WR-25 Weather ReportDuring Installation of the Various Sensors Operation Index / top Texas Weather Instruments, Inc Section Calibration Method Calibration modeTexas Weather Instruments, Inc Humidity Sensor Calibration Reference for more informationCommand Characters When rain rate is off, term rain is substitutedTexas Weather Instruments, Inc First screen of the program will look this TWI Main Menu Term rainfall history register Inx Value Description61st humidity sensor calibration factor Sets the logging interval minutes Sets minutes Sets SecondsInterface RS-232 Interface Control OptionsDE 9 Plug Header Modem InstallationTypical Output Computer InterfaceReport Flag TemperatureRainfall Lunar Tide Cycle = DewpointClearing the Memories Rainfall history modeFCC Radio Frequency Interference Statement Instrument display does not come on Last Hold, 4 hoursSelect Scale, 4Windchill, 5 TemperatureTime Setting Mode

WR-25 specifications

Texas Instruments WR-25 is a high-performance digital data acquisition system designed for a wide range of industrial and scientific applications. Known for its reliability and precision, the WR-25 has become a popular choice among professionals in fields such as environmental monitoring, structural analysis, and industrial automation.

One of the most notable features of the WR-25 is its ability to support a variety of input types, including voltage, current, and thermocouple signals. This flexibility makes it suitable for diverse applications, allowing users to monitor various parameters with ease. The WR-25 also boasts a high sampling rate, which ensures that data is captured accurately and in real-time, providing users with timely insights into their processes.

The WR-25 is equipped with advanced signal processing capabilities, enabling it to filter and analyze data effectively. This allows for the extraction of valuable information from noisy signals, thereby increasing the reliability of measurements. Moreover, its built-in data logging features provide users with the ability to store and retrieve historical data, facilitating trend analysis and long-term monitoring.

In terms of connectivity, the WR-25 comes with multiple interface options, including USB, Ethernet, and serial ports, allowing seamless integration with various devices and systems. This ensures that users can easily connect the WR-25 to their existing infrastructure without the need for extensive modifications.

The WR-25 is designed with user-friendly software that simplifies the data acquisition process. The intuitive interface enables users to configure settings, visualize data, and generate reports with minimal effort. Additionally, the software supports various programming languages, making it accessible for both novice users and experienced developers.

High durability is another key characteristic of the WR-25. Built to withstand harsh environmental conditions, it features robust housing that protects it from dust and moisture. This rugged design makes it suitable for deployment in challenging settings, ensuring uninterrupted operation.

In summary, the Texas Instruments WR-25 is a versatile and reliable digital data acquisition system that offers an array of features and technologies to meet the demands of modern applications. With its high sampling rates, flexible input options, advanced signal processing capabilities, and user-friendly software, the WR-25 stands out as a powerful tool in the realm of data acquisition and analysis.