TransPort™ PT878GC User’s Manual
3
Chapter 1.
1.1.2.2
Electronics Package
The TransPort consists of circuits that generate, receive, and measure the travel time of the ultrasonic pulses. It also
contains a microcomputer that controls operation and calculates flow measurement parameters. Specific circuits
function as follows:
1.
TRANSMIT SIGNAL GENERATOR - The transmit signal generator, under control of the microcomputer and timing
circuit, synthesizes the signal that drives the transmitter.
2.
TRANSMITTER - The transmitter amplifies the signals from the transmit signal generator to a signal that drives the
transmit transducer.
3.
RECEIVER - The receiver amplifies the received signals to a level suitable for the data acquisition circuitry.
4.
DATA ACQUISITION - The data acquisition circuitry digitizes the received signal and stores it in a buffer for
processing by the microcomputer.
5.
TIMING CIRCUIT - The timing circuit generates the transmitter frequency, receive window, controls the data
acquisition circuit and the direction of the transmission.
6.
MICROCOMPUTER - The microcomputer controls the TransPort flowmeter’s operation and calculates flow
measurements derived from the transmitted and digitized received signals. Also, the microcomputer continually
checks for faults and allows the use of built-in diagnostics for troubleshooting.
7.
INPUT/OUTPUT - The input/output circuitry allows the flowmeter to indicate the measured flow with the
0/4 to 20-mA current loop, and to output to a printer or other remote device.
Summary of Contents for PT878GC
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Page 198: ...Appendix A 188 TransPort PT878GC User s Manual...
Page 199: ...Appendix A TransPort PT878GC User s Manual 189 Figure 163 The Site Menu...
Page 201: ...Appendix A TransPort PT878GC User s Manual 191 Figure 165 The Program Menu Pipe Option...
Page 204: ...Appendix A TransPort PT878GC User s Manual 194 Figure 168 The Meter Menu...
Page 205: ...Appendix A TransPort PT878GC User s Manual 195 Figure 1 Logging Mneu...
Page 212: ...Appendix D 202 TransPort PT878GC User s Manual...
Page 218: ...Index 208 TransPort PT878GC User s Manual...
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