InstroFlowController

class InstroFlowController(

name: str,

driver: FlowControllerDriverBase,

publishers: list[Publisher] | None = None,

**kwargs,

)

Bases: Instrument

Flow-controller instrument. Methods return Measurement/Command for publishing.

Initialize an InstroFlowController.

Parameters:

• name – Channel-name prefix for published data.

• driver –

  Concrete flow-controller driver; owns its own transport:

  fc = InstroFlowController(
      "main",
      driver=AlicatMC("ASRL7::INSTR", "M"),
  )
  

• publishers – Publishers that receive emitted Measurement/Command data.

• **kwargs – Default tags applied to every emitted Measurement/Command. Pass dataset_rid="<rid>" to auto-create a NominalCorePublisher.

Note

Direct access to driver-specific methods not in FlowControllerDriverBase (e.g., AlicatMC.set_loop_control_variable, gas-mixture methods) bypasses _resource_lock and is the caller’s responsibility to synchronize if mixed with concurrent InstroFlowController method calls.

Attributes

background_interval	Seconds between background daemon iterations (0 = no wait).
channel_names	Return an insertion-ordered snapshot of all published channel names.

Methods

add_background_daemon_function	Append method to the daemon's call list.
add_publisher	Register a publisher to receive this instrument's Measurement/Command data.
close	Close the underlying driver and stop the daemon.
define_background_daemon	Replace all daemon functions with a single method (called with the given args).
get_channel	Return the most recent length samples for channel_name from the in-memory buffer.
get_flow_data	Poll the device and publish all live measurements at once.
get_mass_flow	Read the current mass flow.
get_pressure	Read the current pressure.
get_process_value	Read the current process value (primary feedback measurement for control).
get_setpoint	Read the current setpoint.
get_single_channel_value	Return the most recent sample for channel_name from the in-memory buffer.
get_volumetric_flow	Read the current volumetric flow.
open	Open the underlying driver.
publish	Fan data out to every configured publisher; kwargs pass through.
select_working_fluid	Select the active working fluid by name.
set_setpoint	Command a new flow setpoint in the device's configured engineering units.
start	Start the background daemon thread.
stop	Signal the background daemon to stop and join it.
tare_flow	Zero the flow reading.