Lake Shore 331 Temperature Controller

class pymeasure.instruments.lakeshore.LakeShore331(adapter, **kwargs)

Bases: pymeasure.instruments.instrument.Instrument

Represents the Lake Shore 331 Temperature Controller and provides a high-level interface for interacting with the instrument.

controller = LakeShore331("GPIB::1")

print(controller.setpoint_1)        # Print the current setpoint for loop 1
controller.setpoint_1 = 50          # Change the setpoint to 50 K
controller.heater_range = 'low'     # Change the heater range to Low
controller.wait_for_temperature()   # Wait for the temperature to stabilize
print(controller.temperature_A)     # Print the temperature at sensor A
disable_heater()

Turns the heater_range to off to disable the heater.

property heater_range

A string property that controls the heater range, which can take the values: off, low, medium, and high. These values correlate to 0, 0.5, 5 and 50 W respectively.

property setpoint_1

A floating point property that controls the setpoint temperature in Kelvin for Loop 1.

property setpoint_2

A floating point property that controls the setpoint temperature in Kelvin for Loop 2.

property temperature_A

Reads the temperature of the sensor A in Kelvin.

property temperature_B

Reads the temperature of the sensor B in Kelvin.

wait_for_temperature(accuracy=0.1, interval=0.1, sensor='A', setpoint=1, timeout=360, should_stop=<function LakeShore331.<lambda>>)

Blocks the program, waiting for the temperature to reach the setpoint within the accuracy (%), checking this each interval time in seconds.

Parameters
  • accuracy – An acceptable percentage deviation between the setpoint and temperature

  • interval – A time in seconds that controls the refresh rate

  • sensor – The desired sensor to read, either A or B

  • setpoint – The desired setpoint loop to read, either 1 or 2

  • timeout – A timeout in seconds after which an exception is raised

  • should_stop – A function that returns True if waiting should stop, by default this always returns False