Panametrics GF868, Programming Manual, Page: 141 / 167

Serial Communications 6-1
12/1/99
Introduction
The Model GF868 flowmeter is equipped with a standard RS232
serial interface. By using this interface, any log files stored in the
GF868’s memory may be easily uploaded to a personal computer. In
order to accomplish this, the following steps must be completed:
•
Connect the GF868 to the personal computer
•
Check the GF868 baud rate setting
•
Set up the personal computer’s terminal software
•
Transfer the log files to the personal computer.
Wiring the RS232
Interface
The first step is to connect the built-in RS232 port in the GF868 to
one of the serial ports (COM1 or COM2) on the personal computer.
Table 6-1 below lists the standard cables available from Panametrics
for this purpose.
Each of the cables listed in Table 6-1 above is available in several
standard lengths. However, a user-supplied cable may be used, if
preferred. In either case, wire the GF868 end of the serial cable in
accordance with the pin designations listed in Table 6-2 below.
Note:
For basic serial communications between a single GF868 and
a single personal computer, no connections are required to
pins 4 and 5 of the GF868’s serial connector. However, these
pins should be jumpered together to ensure proper operation.
Table 6-1: Panametrics Serial Cables
Part Number PC Connector GF868 Connector
704-659 DB25 Male Flying Leads (5)
704-660 DB9 Male Flying Leads (5)
704-661 DB25 Female Flying Leads (5)
704-662 DB9 Female Flying Leads (5)
Table 6-2: RS232 Pin Connections
GF868
Pin #
Panametrics
Cable Color
DB25 Cable
Pin #
DB9 Cable
Pin #
1 (RTN) Green 7 5
2 (TX) Black 3 2
3 (RX) Red 2 3
4 (DTR) White 20 4
5 (CTS) Yellow 5 8