Stanford Research Systems RGA100, Operating Manual And Programming Reference

Page: 108 / 362

6-4 The RGA Com Utility
SRS Residual Gas Analyzer
Introduction
The RGA comes standard with an RS232 communications port. A host computer
interfaced to the RGA can easily configure, calibrate, diagnose and operate the
quadrupole mass spectrometer using ASCII commands. The RGA head executes the
commands in the order received and, when information is requested, data is quickly
returned to the computer for analysis and display.
The fast exchange of data between the host computer and the RGA provides dynamic
information about the status of a vacuum process or system. This Command Set
facilitates integration of all the RGA functions into any processing or diagnostic program.
The RGA COM Utility
Introduction
Note : If you are going to use the RGA Windows program you do not need to use this
utility.
The RGA Com Utility is a simple Windows Terminal program that allows you to
communicate with the RGA Head directly by typing valid RGA commands on your
keyboard. The program functions like any common terminal program where the typed
characters are sent directly to the serial communications port and any received characters
are displayed immediately on the screen.
The RS-232 communication parameters of RGA Com are fixed to be compatible with the
SRS RGA Head. The only variable that may be selected is the communications port.
RGA Com Fixed parameters:
x
28.8k Baud rate
x
8 Data bits
x
No Parity
x
1 Stop Bit
Communicating with a Head
To connect to an SRS RGA Head do the following:
1. Start the RGA Com program.
2. Locate the port to which the RGA is connected on the connector column and click to
select it.
3. Click on the connect button to connect RGA COM to the RGA head.
4. Begin typing commands into the right panel with the blinking cursor. Press ““enter””
after each command to validate it.
5. When you are done, select ““Disconnect”” and exit the program.