Keithley2400

class Keithley2400(

visa_resource: str | VisaConfig,

)

Bases: DMMDriverBase

Keithley 2400 SMU as a sense-only DMM.

Integration time is set via NPLC (0.01–10); the 2400 has no aperture-in-seconds. Digits aren’t directly settable — use NPLC. AC is not supported.

Methods

close	Close the underlying transport.
measure_ac_current	Trigger an AC-current measurement and return the value (amperes RMS, vendor-dependent).
measure_ac_voltage	Trigger an AC-voltage measurement and return the value (volts RMS, vendor-dependent).
measure_dc_current	Trigger a DC-current measurement and return the value (amperes).
measure_dc_voltage	Trigger a DC-voltage measurement and return the value (volts).
measure_four_wire_resistance	Trigger a 4-wire-resistance measurement and return the value (ohms).
measure_resistance	Trigger a 2-wire-resistance measurement and return the value (ohms).
open	Open the underlying transport and put the instrument into a known state.
set_ac_current_nplc	Set AC-current integration time to nplc power-line cycles.
set_ac_current_range	Set manual AC-current range to value amperes; None selects auto-range.
set_ac_voltage_nplc	Set AC-voltage integration time to nplc power-line cycles.
set_ac_voltage_range	Set manual AC-voltage range to value volts; None selects auto-range.
set_aperture_seconds	Set integration time directly in seconds.
set_dc_current_nplc	Set DC-current integration time to nplc power-line cycles.
set_dc_current_range	Set manual DC-current range to value amperes; None selects auto-range.
set_dc_voltage_nplc	Set DC-voltage integration time to nplc power-line cycles.
set_dc_voltage_range	Set manual DC-voltage range to value volts; None selects auto-range.
set_digits	Unsupported — the 2400 has no digits SCPI; use set_aperture_nplc for resolution.
set_four_wire_resistance_nplc	Set 4-wire-resistance integration time to nplc power-line cycles.
set_four_wire_resistance_range	Set manual 4-wire-resistance range to value ohms; None selects auto-range.
set_measurement_function	Configure the 2400 sense/source for function.
set_two_wire_resistance_nplc	Set 2-wire-resistance integration time to nplc power-line cycles.
set_two_wire_resistance_range	Set manual 2-wire-resistance range to value ohms; None selects auto-range.

open() → None

Open the underlying transport and put the instrument into a known state.

Concrete drivers also do one-shot setup here (e.g. *CLS to clear the error queue, SYST:REM for remote control).

close() → None

Close the underlying transport. Idempotent.

set_measurement_function(

function: MeasurementFunction,

) → None

Configure the 2400 sense/source for function.

set_digits(n: int) → None

Unsupported — the 2400 has no digits SCPI; use set_aperture_nplc for resolution.

set_dc_voltage_nplc(nplc: float) → None

Set DC-voltage integration time to nplc power-line cycles.

set_dc_current_nplc(nplc: float) → None

Set DC-current integration time to nplc power-line cycles.

set_two_wire_resistance_nplc(nplc: float) → None

Set 2-wire-resistance integration time to nplc power-line cycles.

set_dc_voltage_range(value: float | None) → None

Set manual DC-voltage range to value volts; None selects auto-range.

set_dc_current_range(value: float | None) → None

Set manual DC-current range to value amperes; None selects auto-range.

set_two_wire_resistance_range(value: float | None) → None

Set manual 2-wire-resistance range to value ohms; None selects auto-range.

measure_dc_voltage() → float

Trigger a DC-voltage measurement and return the value (volts).

measure_dc_current() → float

Trigger a DC-current measurement and return the value (amperes).

measure_resistance() → float

Trigger a 2-wire-resistance measurement and return the value (ohms).

measure_ac_voltage() → float

Trigger an AC-voltage measurement and return the value (volts RMS, vendor-dependent).

measure_ac_current() → float

Trigger an AC-current measurement and return the value (amperes RMS, vendor-dependent).

measure_four_wire_resistance() → float

Trigger a 4-wire-resistance measurement and return the value (ohms).

Default raises NotImplementedError; override on drivers whose instrument has dedicated sense leads (e.g. Agilent 34401A).

set_ac_current_nplc(nplc: float) → None

Set AC-current integration time to nplc power-line cycles.

set_ac_current_range(value: float | None) → None

Set manual AC-current range to value amperes; None selects auto-range.

set_ac_voltage_nplc(nplc: float) → None

Set AC-voltage integration time to nplc power-line cycles.

set_ac_voltage_range(value: float | None) → None

Set manual AC-voltage range to value volts; None selects auto-range.

set_aperture_seconds(seconds: float) → None

Set integration time directly in seconds.

Default raises NotImplementedError. Mutually exclusive with set_aperture_nplc on a given driver — vendors typically expose one or the other.

set_four_wire_resistance_nplc(nplc: float) → None

Set 4-wire-resistance integration time to nplc power-line cycles.

set_four_wire_resistance_range(value: float | None) → None

Set manual 4-wire-resistance range to value ohms; None selects auto-range.