Experimental Physics and
Industrial Control System

David Maden <[email protected]> · Wed, 05 Dec 2007 14:23:42 +0100

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