6
Communications Programs
The DPX-200 transmits data via its
RS-232 output as soon as it is pow-
ered up. In order to receive the da-
ta, a communications (or terminal)
program must be running on your
computer. We recommend
Tera
Term
;
it is easy to use, free, and
available for download from
www.download.cnet.com. When you
reach that page, type “Tera Term” in
the Search box; you will then be able
to download the installation program.
Then:
1. Install the program and run it.
2. A
New Connection
window will
open. Click the “Serial” button,
then select the COM port you
will be using, and click OK.
3. Tera Term should now ready to
receive data from the DPX-200.
Make sure they are connected
via the adapter cable, and pow-
er up the DPX-200.
4. Introductory text will be dis-
played indicating the version of
the embedded program. The
computer will then display three
numbers: Relative Humidity,
Dry Bulb Temperature, and
Dew Point. New readings will
be displayed every few seconds
and are in a comma delimited
format that can be copied and
pasted into a spreadsheet pro-
gram, if desired.
If readings are not displayed,
turn
the DPX-200 off, and in Tera Term
click on
Setup
in the menu bar, then
select
Serial Port
. This will open a
window where you can check sev-
eral parameters:
Port:
Try another port until you
find the right one.
Baud rate:
Should be 9600.
Data:
8 bit
Parity:
None
Stop:
1 bit
Flow Control:
Off
Once you get a working display you
may want to save your settings.
Refer to Tera Term’s help file for
information on this and other func-
tions.
Other communications programs
can also be used; some older ver-
sions of Windows include one
called HyperTerminal. Refer to its
help file for information on using it
and applying the parameters above.
