7 Digital Communication Interface
Tocontrol the furnace through a computer, follow the instructions listed below.
The program suppliedis a demo program and may be altered by you for your
specificneeds.
Firstmake the appropriate cable assembly for your computer system. The serial
communicationscable attaches to the calibrator through the DB-9 connector at
the back of the instrument. Figure 4 shows the pin-out of this connector and
suggested cable wiring.To eliminate noise, the serial cable should be shielded
with lowr esistance between the connector (DB-9) and the shield.
Connect the appropriate connectors to your computer and to the furnace. To
communicate with the furnace:
25
7 Digital Communication Interface
Figure4 RS-232 Cable Wiring