srsinst.dc205

srsinst.dc205 is a Python package to control the DC205 Voltage source from Stanford Research Systems (SRS).

srsinst.dc205 is based on srsgui, which you do not need to install separately, but is included with this install.

Installation

You need a working Python 3.7 or later with pip (Python package installer) installed. If you don't, install Python to your system.

To install srsinst.dc2052 as an instrument driver , use Python package installer pip from the command line.

python -m pip install srsinst.dc205

To use it as a GUI application, create a virtual environment, if necessary, and install:

python -m pip install srsinst.dc205[full]

Run srsinst.dc205 as GUI application

If the Python Scripts directory is in your PATH environment variable, start the application by typing from the command line:

dc205

If not,

python -m srsinst.dc205

will start the GUI application.

Once running the GUI, you can:

• Connect to an DC205 from the Instruments menu.
• Select a task from the Task menu.
• Press the green arrow to run the selected task.

You can write your own task(s) or modify an existing one and run it from the GUI application, too.

Use srsinst.dc205 as instrument driver

• Start a Python interpreter, a Jupyter notebook, or an editor of your choice to write a Python script.
• Import the DC205 class from srsinst.dc205 package.
• Create an instance of the DC205 and establish a remote connection.

|

C:\>python
Python 3.8.3 (tags/v3.8.3:6f8c832, May 13 2020, 22:37:02) [MSC v.1924 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from srsinst.dc205 import DC205
>>> vs = DC205('serial','COM7',115200)
>>> vs.check_id()
('DC205', 's/n20500476', 'ver1.80')

DC205 is comprised of multiple Components, which provides groupings of related commands and class methods. The Component class has a convenience attribute dir to show available attributes and methods in the Python dictionary format.

>>> vs.dir.keys()
dict_keys(['components', 'commands', 'methods'])

DC205 has 5 components that contain remote commands and methods as organized in the Remote Operation chapter of the DC205 Operating and Service Manual.

>>> vs.dir['components'].keys()
dict_keys(['config', 'setting', 'scan', 'setup', 'interface', 'status'])

Configure DC205 components

Let's set the DC205 Configuration.

>>> vs.config.dir
{'components': {},
 'commands': {'voltage_range': ('DictCommand', 'RNGE'),
              'isolation': ('DictCommand', 'ISOL'),
              'remote_sensing': ('DictCommand', 'SENS'),
              'output': ('DictCommand', 'SOUT')},
              'methods': ['set_range', 'enable_output', 'disable_output']}

If a command is a DictCommand instance, it uses mapped keys and values. Use get_command_info() to find out the mapping dictionary information.

>>> vs.config.get_command_info('voltage_range')
{'command class': 'DictCommand',
 'raw remote command': 'RNGE',
 'set_dict': {'range1': 0, 'range10': 1, 'range100': 2},
 'get_dict': {'range1': 0, 'range10': 1, 'range100': 2},
 'index_dict': None
}

The command vs.config.voltage_range encapsulates the raw command 'RNGE' explained in the Setion 4.4.4 of the manual. The token integers (0, 1, and 2) are mapped to the strings ('range1', 'range10', and 'range100')

>>> vs.config.voltage_range
'range1'
>>> vs.config.voltage_range='range10'
>>> print(vs.config.voltage_range)
range10

You can configure other parameters in the similar way.

>>> vs.setting.voltage
0.0
>>> vs.setting.voltage = 0.5
>>> vs.setting.voltage
0.5
>>> vs.config.get_command_info('output')
{'command class': 'DictCommand',
 'raw remote command': 'SOUT',
 'set_dict': {'off': 0, 'on': 1},
 'get_dict': {'off': 0, 'on': 1},
 'index_dict': None
}
>>> vs.config.output
'off'
>>> vs.config.output = 'on'
>>> vs.config.output
'on'