Markus Zolliker
d55ee42612
mainly from frappy_psi Change-Id: I192811459aebe97f3076888cd31a308a51e6aa49
44 lines
1.6 KiB
Python
44 lines
1.6 KiB
Python
# *****************************************************************************
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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# details.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Module authors:
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# Markus Zolliker <markus.zolliker@psi.ch>
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# *****************************************************************************
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"""very simple LakeShore Model 340 driver, resistivity only"""
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import time
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from frappy.datatypes import StringType, FloatRange
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from frappy.modules import Parameter, Property, Readable
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from frappy.io import HasIO, StringIO
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class LscIO(StringIO):
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identification = [('*IDN?', 'LSCI,MODEL340,.*')]
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end_of_line = '\r'
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wait_before = 0.05
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class ResChannel(HasIO, Readable):
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"""temperature channel on Lakeshore 340"""
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ioClass = LscIO
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value = Parameter(datatype=FloatRange(unit='Ohm'))
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channel = Property('the channel A,B,C or D', StringType())
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def read_value(self):
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return float(self.communicate('SRDG?%s' % self.channel))
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