Stanford Research Systems RGA100, Operating Manual And Programming Reference

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14 Appendix C
SRS Residual Gas Analyzer
If uninterrupted datalogging is a requirement in your process, you should seriously consider the PPM100
as an upgrade for the PC/RGA Windows setup.
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RGA users who require access to RGA data over the World Wide Web
The Embedded Web Server (EWS) available for the PPM100 provides the most convenient way
to access RGA data through the Internet. The EWS can also be configured to allow access to
process control functions, so that any vacuum system can be monitored and controlled from
anywhere in the world.
Use the web interface to monitor your vacuum system from your office or from home without
having to pay periodic visits to your lab and while waiting for your system to pump down. Use
the control capabilities to turn heating jackets on/off or activate/deactivate valves or pumps and
gauges from the comfort of your office.
Note! Web access is not supported by the RGA Windows software package provided with the
SRS RGA.
As an added convenience, the PPM100 includes an e-mail notification system, that can be easily
programmed to notify RGA/PPM100 users of important vacuum system events by sending e-
mail messages to a user-specified address.
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RGA users in process environments incompatible with PCs
PC computers are often incompatible with process environments, and alternative solutions such as remote
interfacing or industrial PCs are often technically incompatible or prohibitively expensive. Desktops are
often too large, and laptops are generally considered too delicate for the process floor. The standalone
PPM100 solves all of the above problems with a small, rugged, reliable and rack mountable package.
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RGA users who require 24/7 access to partial pressure data
PPM100 provides 24/7 access to your RGA data. If your application requires uninterrupted access to gas
composition information from your vacuum system, carefully consider a PPM100 for your RGA setup.
For example, surface scientists are used to keeping a watchful eye on their vacuum system’’s RGA spectra
throughout system pumpdowns and during sample handling. Displaying the RGA data with a standalone
PPM100, frees the experiment’’s computer(s) for critical (i.e. experiment related) data acquisition
functions and minimizes the possibility of missing important ““vacuum events”” while RGA data is not
being displayed on the computer’’s screen.
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RGA users who require a compact and mobile measurement setup
PPM100 offers a very compact, rugged and rack mountable package. Its size can only be compared to a
much more delicate laptop PC.
Vacuum engineers and technicians, requiring mobile, RGA-based, diagnostic systems should seriously
consider the PPM100 as a compact and rugged substitute for the PC/RGA Windows setup. For example,
a PPM100/RGA system provides an excellent portable ““leak detection”” setup .
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RGA users who have PC interfacing requirements beyond RS232
The SRS RGA offers only one interface option- RS232 at 28.8 Kbaud rate.
If your interfacing requirements involve GPIB, USB or ethernet , or you simply need a more flexible
RS232 setup, consider a PPM100 as a bridge between your RGA and your process computers.