Teledyne ULTRAFLOW 150, Operation Manual, Page: 32 / 162

ULTRAFLOW 150 GAS FLOW AND TEMPERATURE MONITOR
used to communicate with an optional test and configuration program. The
communication port parameters are listed in Table 5-2.
Table 5-2
TIE RS232C Serial Communication Parameters
BAUD RATE STOP BITS DATA BITS PARITY
9600 1 8 NONE
5.2.3.9 Computer Module Board
The Computer Module is a stand-alone Processor Board that plugs horizontally
into the Flow Mother Board. The Processor is an MC68332. The application
software is loaded into two flash memory chips U1 and U5. Two SRAM’s are
used for working memory. The Computer Module reads the integrated receive
window data from the Flow Mother Board RAM, and performs all of the time,
velocity, flow and temperature calculations. It handles all of the calculations and
controls all serial communication to and from the TIE. An RS232 serial port is
supported by the computer module. The port runs a custom “Modbus” protocol.
An optional software tool is available which allows the operator to communicate
with the TIE through the serial port.
5.2.4 Preamp Boards
The TIE can control up to four transducers. Each transducer has a Preamp Board
associated with it. There are two different types of Preamp Boards, the
Electrostatic Preamp and the Flow Preamp Driver Board.
Consult the Site Specification Data sheet of Appendix A for information on the
configuration of your individual monitor.
5.2.4.1 Electrostatic Preamp Driver Board
The Electrostatic Preamp Driver Board is used exclusively with the Electrostatic
(50 KHZ) Transducers. It plugs into the preamp slots on the left side of the Flow
Mother Board and connects directly to the transducer probe via a coax cable and a
single twisted shielded pair cable. This board has circuits to bias the transducer,
amplify and apply the transmit waveform, amplify the receive signal, and apply a
digital gain to the receive signal. The purge switch signal is passed directly
through the preamp to the Flow Mother Board.
5.2.4.2 Flow Preamp/Driver Board
This Preamp Board can be used on monitors with the Electrostatic or Long Range
Transducers. However, it must be used in conjunction with an Ultraflow150 Flow
Buffer Board. The Ultraflow 150 Flow Preamp/Driver Board also plugs directly
into the preamp slots in the Flow Mother Board. It is connected to the Flow
5-8