Chapter 3 Pc Interface Software; Get Display Data In Real Time - Omega CTXL-TRH-W-W9 User Manual

PC Interface Software
3
3 PC Communication
You can communicate with the CTXL recorder thru RS232 port from a PC.
There are a number of PC commands that allows the user to do the following
functions:
• Get the data (Like Temperature & Relative Humidity) in real time. This is the
• Download the stored chart data from the recorder to the PC. It will save the
• Re-scale the Chart paper for one or both Pens to any range within the input
• Reset the Chart scale back to the Factory standard scales.
You can initiate the PC commands from the Hyper terminal or can develop your
own program and incorporate these commands. Here are the steps to work from
the Hyper terminal:
• From Start
• Create a name for your communication
• Set the communication settings as follows (In the Properties Menu):

3.1 Get Display Data in Real Time

You can get the data for channels 1 & 2 in real time. It will be the same data
displayed on the LCD. The following two commands perform such functions.
In the Temperature/Humidity Model, the temperature data is multiplied by 10
using the AT command.
Please note that all the PC commands terminate with a Carriage Return. In the
Example section of the following tables, the PC commands are in Bold, and the
response is in regular text.
same data displayed on the LCD.
data into a data file. It can then be imported into the Excel spread sheet
program for further review and analysis.
operating range.
Programs
- COM port (1, 2, 3)
- Baud Rate (9600)
- Data Bits (8)
- Parity (None)
- Stop Bit (1)
- Flow Control (None)
Command Description
AT Get display data from Chan 1 (Temperature)
AH Get display data from Chan 2 (Humidity)
Accessories Hyper Terminal
Example
AT;0748
AH;0048
3-1