Data can be transmitted in real time or logged data may downloaded from the ozone monitor to a PC or a laptop running a terminal emulator.
Technical Note No. 007
Use of Tera Term Pro and Hyperterminal to Collect and Download Data
Date: 12 September 2006; link updated 25 March 2025
Author: Craig Williford
Background
Data can be transmitted in real time or logged data may downloaded from the
ozone monitor to a PC or a laptop running a terminal emulator. Microsoft
Windows provides the free terminal emulator “HyperTerminal”, usually found in
the communications category of the Program Files. The display buffer size in
HyperTerminal is limited to under 100 lines so many users prefer using “Tera
Term Pro”, another free terminal emulator which can be downloaded from our
website:
https://2btech.io/wp-content/uploads/software/teraterm-4.105.zip
With a larger buffer size (up to 10,000 lines), the user can transmit the data to the
tera term screen, copy the data, and paste it into a text file which can then be
imported into excel.
However, both HyperTerminal and Tera Term Pro allow the user to transfer the
incoming data directly to a text file with no limitations for buffer size. Below are
procedures on using HyperTerminal and Tera Term Pro to receive data from an
Ozone Monitor Model 202 and 205.
Collecting and Downloading Data Using Windows HyperTerminal
1. Connect the straight through serial cable to the back of the ozone monitor and
the PC or laptop.
2. Open a HyperTerminal Session
Windows XP:
Start→Programs→Accessories→Communications→HyperTerminal Icon
3. When prompted for a name, choose a name for your connection (e.g., Ozone
Monitor)
4. Click "OK"
5. In the "Connect Using" field, select the com port your serial connection is
using. By default it is COM1, but if using a USB to serial adapter, check
which port it is using by looking at its device properties.
6. Under "Port Settings", all fields should be left default except for "Bits Per
Second" (baud rate). The Ozone Monitor has three options selectable from its
menu, 2400, 4800, and 19200. The instrument is shipped with the baud rate
set at 2400. The baud rate for the Nitric Oxide Monitor is 4800. Select the
correct baud rate and click "OK". This will start your communications session.
7. Power up the Ozone monitor. If communication is established, the first thing
that should be seen on the HyperTerminal screen is the Averaging period.
The factory default is 10 seconds (Avg: 10 s/rdg). This will be followed by
lines of data every 10 s. If unable to gain connection, check the setting of the
baud rate on the monitor and the baud rate and com port selection in
HyperTerminal and try again.
8. Once communications are established, data will be transmitted at the averaging
cycle and will appear on the screen in the display buffer.
9. To collect or download data directly to a file:
a. Click on "Transfer" option
b. Select "Capture Text"
c. Select the path create a file name for the data file
d. Click "Start" to start the collecting data to the file
e. If you are downloading logged data, enter the menu of the monitor and
select XMIT
f. To stop or pause, click Transfer → Capture Text → Stop
g. After stopping the transfer, the file is available to the user
Collecting and Downloading Data Using Tera Term Pro
1. Open Tera Term Pro
2. Select the correct baud rate: Setup → Serial Port
3. To adjust the buffer size: Setup → Window → select "Scroll Buffer" and enter
10,000 for max buffer size
4. To download data directly to a file:
a. File → log → choose the path and file name of the file you will make. This
will open a separate window showing the number of bytes transmitted and
buttons to "close", "pause", and "help"
b. Click "close" when finished transmitting data