InstroELoad

class InstroELoad(

name: str | None = None,

driver: ELoadDriverBase | None = None,

publishers: list[Publisher] | None = None,

config: ELoadConfig | dict | Path | str | None = None,

autostart: bool = False,

**kwargs,

)

Bases: Instrument

Electronic-load instrument. Methods return Measurement/Command for publishing.

Initialize an InstroELoad.

Provide either config or driver, not both.

Parameters:

• name – Channel-name prefix for published data. Falls back to config.device.name when config is given.

• driver –

  Concrete E-Load driver; owns its own transport:

  eload = InstroELoad(
      "main",
      driver=BK85XXB("ASRL19::INSTR"),
  )
  

• publishers – Publishers that receive emitted Measurement/Command data. Combined with any publishers declared in config.

• config – An ELoadConfig, a dict, or a path to a JSON config file. Its load block is applied through the public setters on open(); the input is never enabled from config.

• autostart – When True, open the connection and start background polling.

• **kwargs – Default tags applied to every emitted Measurement/Command. Pass dataset_rid="<rid>" to auto-create a NominalCorePublisher (uses the on-disk ‘default’ Nominal credential).

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_current	Measure the current (amperes) sensed on channel.
get_single_channel_value	Return the most recent sample for channel_name from the in-memory buffer.
get_voltage	Measure the voltage (volts) sensed on channel.
open	Open the underlying driver and apply any configured load state.
output_enable	Enable or disable the output on channel.
publish	Fan data out to every configured publisher; kwargs pass through.
set_level	Set the operating level in the active mode's units (CC: A, CV: V, CP: W, CR: Ω).
set_mode	Set the channel's operation mode: CC, CR, CP, or CV.
set_range	Set the range from the expected maximum operating value in the active mode's units (CC: A, CV: V, CP: W, CR: Ω).
set_slewrate	Set the per-edge current slew rate (A/μs) for direction (RISE/FALL/BOTH).
short_output	Enable or disable the channel short.
start	Start the background daemon thread.
stop	Signal the background daemon to stop and join it.