Experimental Physics and
Industrial Control System

David Maden <[email protected]> · Wed, 05 Dec 2007 16:58:26 +0100

It seems as though our Web police don't allow access to our CVS repository.
So I've put a tar-ball at:
 www.sls.psi.ch/controls/help/howto/LakeshoreCryojet.tgz
which I'm told is accessible. It probably won't stay there very long, though.
David

Steve Lewis wrote:

I also need support for the Lakeshoe 340. The URL you gave does appear
to be blocked. Perhaps you could make it available some other way.
Much thanks in advance!
Shepherd, EL (Emma) wrote:

Hi all,
Has anyone written any EPICS support for a temperature controller or
temperature monitor made by Cryogenic Control Systems
(http://www.cryocon.com/)?
I'm also looking for support for a helium depth indicator made by
Twickenham Scientific Instruments (http://www.twicksci.co.uk/)
They all have serial interfaces so I am thinking about writing EPICS
support using Streams if nobody has done this already.
Cheers,
Emma

Hi Emma,
We don't have this particular temperature controller in our collection
of serial devices at SLS, but we do have the Lakeshore models 331 and
340. Unless the PSI firewalls are blocking access, the CVS repository
of the software should be visible here:
 www.sls.psi.ch/cgi-bin/cvsweb.cgi/G/DRV/lakeshore/
We also have support for Oxford Instrument's cryojet with liquid
nitrogen auto fill controller (same URL, substitute "cryojet" for
"lakeshore"). They both have the same structure: a collection of
simple stream-device EPICS records for sending commands and status
requests to the device, glued together with an snl program. There's a
bit of documentation on setting up the cryojet at:
 www.sls.psi.ch/controls/help/howto/cryojet.html
but unfortunately nothing for the Lakeshore controllers.
Getting the Cryogenic Control Systems device to work with the
Lakeshore code might simply be a case of a new stream-device protocol
file.
For the helium depth indicator, you might consider simply connecting
its analogue output to an ADC channel, rather than using its serial port.
Regards, David

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System