Current version
The
current version of
CHEAQS is CHEAQS Pro 2011.3, 21 December 2011.
IMPORTANT: there was a bug discovered in versions before
2010. Click
here for details.
New users (who did not install CHEAQS before)
Download
SETUP.EXE (2.4 Mb) and run it.
If you successfully installed CHEAQ Pro before
ONLY if you installed 2011.1 or 2011.2 successfully: download the
update package
here and unzip it to the
current program directory (C:\Program Files\CHEAQS Pro by
default).
New features in 2011.1, 2011.2 and 2011.3
- CHEAQS now includes Tipping's Model VI (Tipping, 1998).
- In 2011.2, convergence is much faster for Model VI. Also,
two bugs were fixed.
- In 2011.3 you can use Model VI in titrations and
calibrations.
New features in 2010.3
- You can now apply Model V parameters in calibrations.
New features in 2010.2
- You can now run a 'replace'-titration to replace a cation or
ligand by another cation or ligand and see what happens.
- In addition, you can apply Model V parameters as independent
or dependent variables in titrations.
You may want to register... (recommended)
If you register as user, you will be
informed about updates, bugs and so on. You can expect 2 to 4
email-messages per year.
REGISTRATIONS EARLIER THAN JULY 2009 ARE NO LONGER VALID
(because of new regulations).
Of course your email address will not be used for anything else.
Known bugs
There was a bug discovered in earlier versions. If you specified
'free activity' as input type, in some cases the program may use a
wrong charge for converting free activity to free concentration.
It is hard to explain in which cases this occurred, but what I can
say is that it never occurred for cations, only for the redox and
for ligands. If you are in doubt whether this bug affected your
results, contact me and specify your input data (please attach it)
and the version of CHEAQS you were using. Apologies for any
inconvenience.
For all other cases no calculation problems are known.
For versions 2010.1 and later, this bug is corrected. Some other
bugs (considered minor) are known. Please install, then choose
'bugs' from the help menu.
Next update
Not sure yet. Some modifications will be made to the current
version. In the meantime I am completely redesigning CHEAQS.