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Changelog

If you don't want to try and figure out all the changes from the diff and commits, just read this. I wrote this to make the changes more robust.

0.9.7: quantumdesign package minor changes & more documentation

  • Added back in a try-except structure in the AddReference part of qdinstrument.py. As a result, a FileNotFoundException may be caught.
  • In the new try-except clause described above, a new logging statement was added because it was found that clr.FindAssembly may return nothing because the interpreter cannot find the QDInstrument.dll file path even if the environment variables and the Python path include a parent directory of QDInstrument.dll. In fact, the solution can be as simple as running sys.path.append(<directory of QDInstrument.dll>).

0.9.6: Keithley read changes

  • Keithley 2400s should be able to properly read out what they're supposed to. The Keithley2400.read() function takes a variable number of arguments that are in the list: 'voltage', 'current', 'resistance', 'time'. The internal workings assume that the function returns a list which has a length which is some multiple of 5. Keithley2400.read() returns a tuple of lists, the first element in the tuple being the mean values of the requested values to be read, the second being the standard deviation (if there are multiple readings in the buffer).

0.9.5: Quantum Design package major update

  • New classes for PPMS, (PPMS) DynaCool, VersaLab, SVSM, and MPMS. The Dynacool class is just a rework of the old Dynacool class, but this time inherits from a general QdInstrument parent class. init.py has been updated for imports.
  • There are two new functions so that users can interface with the rotator module. A user should be able to get and set the position of the rotator now. However, it should be noted that this still requires testing (!!!).
  • Housekeeping: Lots of changes to whitespace/blank line issues in the SR830 package. Went ahead and cleaned up formatting issues in many other packages as well.
  • More housekeeping: Removed old, unused import statements.
  • Changed Nidaq output functions to the old form so that they take both the channel and the output value. It seemed extremely unwieldy to individually set the channel "state" and then write the output.
  • Implemented some RuntimeWarnings if a user didn't receive a response from the Mercury iPS. The response is an acknowledgment that a command was received. Some functions have a RuntimeError if it's a function that deals with the limits of the magnet (e.g. making sure that the magnet doesn't go to 20 T!!!).
  • Added some more instructions on usage in the README.md

Proposed changes

  • For equipment that do not use cryogenics or vacuum pumps (e.g. NOT the Oxford Triton 200 or the Mercury iPS), the unit tests should ensure that what is being read out are the types that are expected (e.g. you expect floats from a resistance reading or an integer from the state of the lock-in sensitivity). Set functions could have a test where a query is made to see if the set function set what you expected.

0.9.1

  • Started keeping a changelog to communicate changes with a wider audience
  • Class names are now CamelCase and start with a capital letter
  • Took out enable/disable_remote functions in Sr830 and Keithley2400 because they just felt unnecessary. The instruments are now opened upon instantiation.

Proposed changes

  • Quantum Design has a few other instruments such as a regular PPMS, an MPMS, and a VersaLab (whatever those are). The decompiled DLL file is actually really easy to read and interpret, so a future version of 0.9 should be seeing implementations of those.