10
RS-232C INTERFACE OPERATION
(For 3173R only)
INTRODUCTION
The RS-232C interface feature can track all displayed values and interface your
Jenco
meter with recorders, printers, computers, etc. For example, the user can log all data
simultaneously to an interfaced IBM PC/AT compatible computer.
This section assumes you are familiar with the basics of data communication, the
RS-232C interface, programming with computer languages, like Delphi, VB, VC, etc. A
simple program must be written in order to send command and receive data from the unit.
If you do not have that knowledge, you must have a rudimentary knowledge and a copy of
the more popular Windows
®
98 operating system or a later version of Microsoft’s
Windows
®
operating system capable of using COM port. In addition you must also have
an interface cable of the DB-9 type (sometimes also called a Serial port connector) and
that the wiring of that connector is wired to be compatible to the RS-232C standard for
RxD, Receive Data and TxD, Transmit Data and Circuit Common.
To use the RS-232C interface, you must choose either to download on line from the
Jenco
website at
http://www.jencoi.com/
a general Windows
®
compatible program that allows
you to receive data from the
Jenco
meter as pre-programmed by that Windows
®
compatible program or you must custom write your own simple program to send the
commands you want to the
Jenco
meter and to receive back the specific data sampled at
the time intervals you specify in your custom written program.
PREPARATION
The
Jenco
unit communicates with a PC computer (IBM PC/AT compatibles) through a
DB-9 interface connector. The DB-9 must be configured to be compatible with the
RS-232C standard for TxD, RxD and Circuit Common. (Please see accompanying
diagram.) After you have connected the cable, turn on both the
Jenco
unit and the
computer, you are now ready for the software part of the operation.
