Instrument management
Use the InstrumentManager() to start experiments and control your PalmSens instrument.
The most high-level way to start a measurement is to use the measure() function:
>>> import pypalmsens as ps
>>> method = ps.CyclicVoltammetry()
>>> ps.measure(method)
You can also manage the connection yourself, using connect(), for example:
>>> with ps.connect() as manager:
... method = ps.ChronoAmperometry()
... measurement = manager.measure(method)
Or using InstrumentManager() directly as a context manager:
>>> instruments = discover()
>>> with ps.InstrumentManager(instruments[0]) as manager:
... measurement = manager.measure(method)
Or managing the instrument connection yourself:
>>> instruments = discover()
>>> manager = ps.InstrumentManager(instruments[0])
>>> manager.connect()
>>> # ...
>>> manager.disconnect()
For more information, see the measurement documentation.
pypalmsens.connect
connect(instrument: None | Instrument = None) -> InstrumentManager
Connect to instrument and return InstrumentManager.
Connects to any plugged-in PalmSens USB device. Error if multiple devices are plugged-in.
Parameters:
-
(instrumentInstrument, default:None) –Connect to a specific instrument. Use
pypalmsens.discover()to discover instruments.
Returns:
-
manager(InstrumentManager) –Return instance of
InstrumentManagerconnected to the given instrument.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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pypalmsens.discover
discover(ftdi: bool = True, usbcdc: bool = True, winusb: bool = True, bluetooth: bool = False, serial: bool = True, ignore_errors: bool = False) -> list[Instrument]
Discover instruments.
For a list of device interfaces, see: https://dev.palmsens.com/python/latest/_attachments/installation/index.html#compatibility
Parameters:
-
(ftdibool, default:True) –If True, discover ftdi devices
-
(usbcdcbool, default:True) –If True, discover usbcdc devices (Windows only)
-
(winusbbool, default:True) –If True, discover winusb devices (Windows only)
-
(bluetoothbool, default:False) –If True, discover bluetooth devices (Windows only)
-
(serialbool, default:True) –If True, discover serial devices
-
(ignore_errorsFalse, default:False) –Ignores errors in device discovery
Returns:
-
discovered(list[Instrument]) –List of dataclasses with discovered instruments.
Source code in src/pypalmsens/_instruments/instrument.py
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pypalmsens.measure
measure(method: BaseTechnique, instrument: None | Instrument = None, callback: Callback | CallbackEIS | None = None) -> Measurement
Run measurement.
Executes the given method on any plugged-in PalmSens USB device. Error if multiple devices are plugged-in.
Parameters:
-
(instrumentInstrument, default:None) –Connect to and meassure on a specific instrument. Use
pypalmsens.discover()to discover instruments. -
(callbackCallback | CallbackEIS | None, default:None) –If specified, call this function on every new set of data points. New data points are batched, and contain all points since the last time it was called. Each point is an instance of
ps.data.CallbackDatafor non-impedimetric orps.data.CallbackDataEISfor impedimetric measurments.
Returns:
-
measurement(Measurement) –Finished measurement.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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pypalmsens.Instrument
dataclass
Dataclass holding instrument info.
Methods:
-
from_port–Create serial port instrument class.
Attributes:
-
baudrate(int) –Baud rate.
-
channel(int) –Channel index if part of a multichannel device.
-
device(Device) –Device connection class.
-
id(str) –Device ID of the instrument.
-
interface(str) –Type of the connection.
-
name(str) –Name of the instrument.
channel
class-attribute
instance-attribute
Channel index if part of a multichannel device.
Returns -1 if instrument is not part of a multi-channel device.
device
class-attribute
instance-attribute
device: Device = field(repr=False)
Device connection class.
from_port
classmethod
from_port(port: str, *, baudrate: int | None = None) -> Instrument
Create serial port instrument class.
Parameters:
-
(portstr) –Name of the port to connect to.
-
(baudrateint, default:None) –Set the baudrate. If None, use the default baudrate.
Returns:
-
instrument(Instrument) –Instrument dataclass
Source code in src/pypalmsens/_instruments/instrument.py
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pypalmsens.InstrumentManager
InstrumentManager(instrument: Instrument)
flowchart TD
pypalmsens.InstrumentManager[InstrumentManager]
pypalmsens._instruments.instrument_manager_async.SupportedMixin[SupportedMixin]
pypalmsens._instruments.instrument_manager_async.SupportedMixin --> pypalmsens.InstrumentManager
click pypalmsens.InstrumentManager href "" "pypalmsens.InstrumentManager"
click pypalmsens._instruments.instrument_manager_async.SupportedMixin href "" "pypalmsens._instruments.instrument_manager_async.SupportedMixin"
Instrument manager for PalmSens instruments.
Parameters:
-
(instrumentInstrument) –Instrument to connect to, use
discover()to find connected instruments.
Methods:
-
abort–Abort measurement.
-
connect–Connect to instrument.
-
disconnect–Disconnect from the instrument.
-
ensure_connection–Raises connection error if the instrument is not connected.
-
get_current_range–Get the current range for the cell.
-
get_instrument_serial–Return instrument serial number.
-
get_potential_range–Get the potential range for the cell.
-
initialize_multiplexer–Initialize the multiplexer.
-
is_connected–Return True if an instrument connection exists.
-
is_measuring–Return True if device is measuring.
-
measure–Start measurement using given method parameters.
-
read_current–Read the current in µA.
-
read_potential–Read the potential in V.
-
set_cell–Turn the cell on or off.
-
set_current_range–Set the current range for the cell.
-
set_multiplexer_channel–Sets the multiplexer channel.
-
set_mux8r2_settings–Set the settings for the Mux8R2 multiplexer.
-
set_potential–Set the potential of the cell.
-
set_potential_range–Set the potential range for the cell.
-
status–Get status.
-
supported_applied_current_ranges–List applied current ranges supported by this device.
-
supported_bipot_ranges–List applied current ranges supported by this device.
-
supported_current_ranges–List current ranges supported by this device.
-
supported_methods–List methods supported by this device.
-
supported_potential_ranges–List applied potential ranges supported by this device.
-
validate_method–Validate method.
-
wait_digital_trigger–Wait for digital trigger.
Attributes:
-
instrument(Instrument) –Instrument to connect to.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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abort
abort() -> None
Abort measurement.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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connect
connect() -> None
Connect to instrument.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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disconnect
disconnect()
Disconnect from the instrument.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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ensure_connection
ensure_connection()
Raises connection error if the instrument is not connected.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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get_current_range
get_current_range() -> AllowedCurrentRanges
Get the current range for the cell.
Returns:
-
current_range(AllowedCurrentRanges) –
Source code in src/pypalmsens/_instruments/instrument_manager.py
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get_instrument_serial
get_instrument_serial() -> str
Return instrument serial number.
Returns:
-
serial(str) –Instrument serial.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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get_potential_range
get_potential_range() -> AllowedPotentialRanges
Get the potential range for the cell.
Returns:
-
potential_range(AllowedPotentialRanges) –
Source code in src/pypalmsens/_instruments/instrument_manager.py
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initialize_multiplexer
Initialize the multiplexer.
Parameters:
-
(mux_modelint) –The model of the multiplexer. - 0 = 8 channel - 1 = 16 channel - 2 = 32 channel
Returns:
-
channels(int) –Number of available multiplexes channels
Source code in src/pypalmsens/_instruments/instrument_manager.py
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is_connected
is_connected() -> bool
Return True if an instrument connection exists.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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is_measuring
is_measuring() -> bool
Return True if device is measuring.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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measure
measure(method: BaseTechnique, *, callback: Callback | CallbackEIS | None = None) -> Measurement
Start measurement using given method parameters.
Parameters:
-
(methodBaseTechnique) –Method parameters for measurement
-
(callbackCallback | CallbackEIS | None, default:None) –If specified, call this function on every new set of data points. New data points are batched, and contain all points since the last time it was called. Each point is an instance of
ps.data.CallbackDatafor non-impedimetric orps.data.CallbackDataEISfor impedimetric measurments.
Returns:
-
measurement(Measurement) –Finished measurement.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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read_current
read_current() -> float
Read the current in µA.
Returns:
-
current(float) –Current in µA.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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read_potential
read_potential() -> float
Read the potential in V.
Returns:
-
potential(float) –Potential in V.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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set_cell
Turn the cell on or off.
Parameters:
-
(cell_onbool) –If true, turn on the cell
Source code in src/pypalmsens/_instruments/instrument_manager.py
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set_current_range
set_current_range(current_range: AllowedCurrentRanges)
Set the current range for the cell.
Parameters:
-
(current_rangeAllowedCurrentRanges) –Set the current range as a string. See
pypalmsens.settings.AllowedCurrentRangesfor options.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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set_multiplexer_channel
Sets the multiplexer channel.
Parameters:
-
(channelint) –Index of the channel to set.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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set_mux8r2_settings
set_mux8r2_settings(connect_sense_to_working_electrode: bool = False, combine_reference_and_counter_electrodes: bool = False, use_channel_1_reference_and_counter_electrodes: bool = False, set_unselected_channel_working_electrode: int = 0)
Set the settings for the Mux8R2 multiplexer.
Parameters:
-
(connect_sense_to_working_electrodebool, default:False) –Connect the sense electrode to the working electrode. Default is False.
-
(combine_reference_and_counter_electrodesbool, default:False) –Combine the reference and counter electrodes. Default is False.
-
(use_channel_1_reference_and_counter_electrodesbool, default:False) –Use channel 1 reference and counter electrodes for all working electrodes. Default is False.
-
(set_unselected_channel_working_electrodeint, default:0) –Set the unselected channel working electrode to disconnected/floating (0), ground (1), or standby potential (2). Default is 0.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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set_potential
Set the potential of the cell.
Parameters:
-
(potentialfloat) –Potential in V
Source code in src/pypalmsens/_instruments/instrument_manager.py
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set_potential_range
set_potential_range(potential_range: AllowedPotentialRanges)
Set the potential range for the cell.
Parameters:
-
(potential_rangeAllowedPotentialRanges) –Set the potential range as a string. See
pypalmsens.settings.AllowedPotentialRangesfor options.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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status
status() -> Status
Get status.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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supported_applied_current_ranges
supported_applied_current_ranges() -> list[AllowedCurrentRanges]
List applied current ranges supported by this device.
Returns:
-
current_ranges(list[AllowedCurrentRanges]) –List of supported current ranges.
Source code in src/pypalmsens/_instruments/instrument_manager_async.py
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supported_bipot_ranges
supported_bipot_ranges() -> list[AllowedCurrentRanges]
List applied current ranges supported by this device.
Returns:
-
current_ranges(list[AllowedCurrentRanges]) –List of supported current ranges.
Source code in src/pypalmsens/_instruments/instrument_manager_async.py
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supported_current_ranges
supported_current_ranges() -> list[AllowedCurrentRanges]
List current ranges supported by this device.
Returns:
-
current_ranges(list[AllowedCurrentRanges]) –List of supported current ranges.
Source code in src/pypalmsens/_instruments/instrument_manager_async.py
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supported_methods
supported_methods() -> list[AllowedMethods]
List methods supported by this device.
Returns:
-
methods(list[AllowedMethods]) –List of supported methods.
Source code in src/pypalmsens/_instruments/instrument_manager_async.py
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supported_potential_ranges
supported_potential_ranges() -> list[AllowedPotentialRanges]
List applied potential ranges supported by this device.
Returns:
-
potential_ranges(list[AllowedPotentialRanges]) –List of supported potential ranges.
Source code in src/pypalmsens/_instruments/instrument_manager_async.py
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validate_method
validate_method(method: Method | BaseTechnique) -> None
Validate method.
Raise ValueError if the method cannot be validated.
Source code in src/pypalmsens/_instruments/instrument_manager.py
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wait_digital_trigger
wait_digital_trigger(wait_for_high: bool)
Wait for digital trigger.
Parameters:
-
(wait_for_highbool) –Wait for digital line high before starting
Source code in src/pypalmsens/_instruments/instrument_manager.py
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pypalmsens.InstrumentPool
InstrumentPool(devices_or_managers: Sequence[Instrument | InstrumentManagerAsync])
Manages a set of instrument.
Most calls are run asynchronously in the background, which means that measurements are running in parallel.
This is a thin wrapper around the InstrumentManagerAsync.
Parameters:
-
(devices_or_managerslist[Instrument | InstrumentManagerAsync]) –List of devices or managers.
Methods:
-
add–Open and add manager to the pool.
-
connect–Connect all instrument managers in the pool.
-
disconnect–Disconnect all instrument managers in the pool.
-
is_connected–Return true if all managers in the pool are connected.
-
is_disconnected–Return true if all managers in the pool are disconnected.
-
measure–Concurrently run measurement on all managers in the pool.
-
remove–Close and remove manager from pool.
Attributes:
-
managers(list[InstrumentManagerAsync]) –List of instruments managers in the pool.
Source code in src/pypalmsens/_instruments/instrument_pool.py
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managers
instance-attribute
managers: list[InstrumentManagerAsync] = managers
List of instruments managers in the pool.
add
add(manager: InstrumentManagerAsync) -> None
Open and add manager to the pool.
Parameters:
-
(managerInstrumentManagerAsync) –Instance of an instrument manager.
Source code in src/pypalmsens/_instruments/instrument_pool.py
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connect
connect() -> None
Connect all instrument managers in the pool.
Source code in src/pypalmsens/_instruments/instrument_pool.py
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disconnect
disconnect() -> None
Disconnect all instrument managers in the pool.
Source code in src/pypalmsens/_instruments/instrument_pool.py
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is_connected
is_connected() -> bool
Return true if all managers in the pool are connected.
Source code in src/pypalmsens/_instruments/instrument_pool.py
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is_disconnected
is_disconnected() -> bool
Return true if all managers in the pool are disconnected.
Source code in src/pypalmsens/_instruments/instrument_pool.py
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measure
measure(method: BaseTechnique, callback: Sequence[Callback | CallbackEIS] | Callback | CallbackEIS | None = None, **kwargs) -> list[Measurement]
Concurrently run measurement on all managers in the pool.
For hardware synchronization, set .general.use_hardware_sync on the method.
For MethodSCRIPT, use 'set_channel_sync 1'.
In addition, the pool must contain: - channels from a single multi-channel instrument only - the first channel of the multi-channel instrument - at least two channels
All instruments are prepared and put in a waiting state. The measurements are started via a hardware sync trigger on channel 1.
Parameters:
-
(methodMethodSettings) –Method parameters for measurement.
-
(callbacklist[Callback] | Callback | CallbackEIS | None, default:None) –If specified, call these functions/this function on every new set of data points. New data points are batched, and contain all points since the last time it was called.
Specify a sequence of callbacks to set a different function for every channel. The number of callbacks must match the number of channels.
Specify a single callback to set the same function to all channels.
-
–**kwargsThese keyword parameters are passed to the measure function.
Source code in src/pypalmsens/_instruments/instrument_pool.py
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remove
remove(manager: InstrumentManagerAsync) -> None
Close and remove manager from pool.
Parameters:
-
(managerInstrumentManagerAsync) –Instance of an instrument manager.
Source code in src/pypalmsens/_instruments/instrument_pool.py
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