Note
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Instrument Interfaces¶
Every instrument interfaces inherits a common state model, and an interface abstraction for a kind of service that instrument may provide.
Every instrument has it’s own submodule by its make and model, and interfaces for that instrument art imported through that submodule.
Different instruments can be used for the same measurement by swapping import statements.
from rminstr.instruments.HP3458A import Voltmeter
Every interface in this package adheres to a common state model. Flow control often looks like this:
Connect to instrument with the class and a VISA address.
Bring to a safe initial state
initial_setup().Adjust settings with
setup.Arm the instrument with
arm.Trigger the instrument with
trigger.Wait for data to be ready with
wait_until_data_available.Fetch data with
fetch_data.Back to step 3.
vm = Voltmeter('GPIB0::16::INSTR')
vm.initial_setup()
vm.setup(v_range=1)
vm.arm()
vm.trigger()
vm.wait_until_data_available(timeout=10)
# Return a dictionary of numpy arrays.
data = vm.fetch_data()
Query an instruments state as needed
vm.query_state()
Close out the connection when you are done.
vm.close()
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