Stimmen - 3, Durchschnittliche Bewertung: 4 ( )

Hersteller: Omega Dateigröße: 111.54 kb Dateiname: M2919.pdf Unterrichtssprache:

The unique Communications Adapter provides a fully isolated serial interface and power source, allowing the transmitter to be configured with a “PC-Only” - no external power supply, calibrator or meter is required! QuicQuicQuicQuicQuick Stark Stark Stark Stark StartttttBefore beginning the process of setting up the transmitter, it is important to understand the difference between calibration and configuration. The transmitter’s precision references (4 and 20 milliamps out; resistance, voltage and current as appropriate; and a thermal reference) are calibrated at the factory and may be adjusted later if necessary. Configuration is the process of defining the sensor type and range in engineering units. Configuration is performed by connecting the transmitter to a PC and running the configuration software. Because the Communications Adapter provides power to the transmitter’s microprocessor, it is not necessary to provide any external power to the transmitter in order to configure it. PC-Only Programmable TransmitterIntrIntrIntrIntrIntroductionoductionoductionoductionoductionModels TX787 and TX788 are microprocessor-based 2-wire transmitters that feature high accuracy and high long-term stability. Setting the new standard in ease of setup, these transmitters feature PC-Only™ configuration technology. The unique Communications Adapter provides a fully isolated serial interface and power source, allowing the transmitter to be configured with a “PC-Only” - no external power supply, calibrator or meter is required! QuicQuicQuicQuicQuick Stark Stark Stark Stark StartttttBefore beginning the process of setting up the transmitter, it is important to understand the difference between calibration and configuration. The transmitter’s precision references (4 and 20 milliamps out; resistance, voltage and current as appropriate; and a thermal reference) are calibrated at the factory and may be adjusted later if necessary. Configuration is the process of defining the sensor type and range in engineering units. Configuration is performed by connecting the transmitter to a PC and running the configuration software. Because the Communications Adapter provides power to the transmitter’s microprocessor, it is not necessary to provide any external power to the transmitter in order to configure it. PC-Only Programmable Transmitter 1. Install the Configuration and Calibration software Run “setup.exe” on the distribution diskette and follow the on-screen instructions. Note: the software contained on the distribution diskette runs under Windows 95 and Windows NT. If you are running Windows v3.1, contact Omega Engineering. 2. Connect the Communications Adapter to the computer and transmitter. 3. Identify the serial port to which the Adapter is connected. Select “Options” from the menu bar, then click “Communications” and select the correct COMM port from the pull- down menu. Note that if you change the serial port you must exit the software and restart it with the correct setting. 4. Configure the transmitter. Configuration What you will need. Calibration •PC • Communications Adapter • Transmitter • Multimeter • 24VDC power supply •PC • Communications Adapter • Transmitter ...... CalibrCalibrCalibrCalibrCalibr. aaaaa.... tiontiontiontiontion To calibrate the transmitter, connect a 24VDC power supply, a 250W load and multi-meter (in milliamp mode) in series to the transmitter's output. 1. Upload 2. Click on the Calibration Icon 3. Output Calibration: Select "Output 4mA", enter the mA reading from the meter into the dialog box and click "Send to Device." Repeat for 20mA calibration. 4A. Input Calibration Models XXXXX-X000 (e.g. TX787-0000): Provide a precision 100.00mV source to the transmitter, select "Input mV" on the Device Calibration screen, wait for the on-screen display to settle, then click "Send to Device." Repeat the procedure, substituting a 300.00W input (4-wire connection) and selecting "Input Ohms." 4B. Input Calibration Models XXXXX-X001 (e.g. TX787-0001): Provide a precision 300.00mV source to the transmitter, select "Input mV" on the Device Calibration screen, wait for the on-screen display to settle, then click "Send to Device." Repeat procedure, substituting a 15.00 Volt input and selecting "Input Volts", and substituting a 50mA input, selecting "Input mA." Note that the input terminals are different for each of the signal levels. 5. To calibrate the cold junction compensation reference, select “Temperature,” enter the nominal ambient temperature in the dialog box, set the input simulation type to match the input simulator (i.e., type J thermocouple), verify that the simulator is set to the proper value, then click “Send to Device.” 6. Click “Close.” A message in the lower left corner of the screen will indicate the progress of the download and finally that the download has been successfully completed. ........ ConfigurConfigurConfigurConfigurConfigur. aaaaa.... tiontiontiontiontion Configuration may be performed with...

Herunterladen

Geben Sie zwei Ziffern: