Connecting to Lakeshore 331 by Lakeshore in Python

Instrument Card

The Model 331 cryogenic temperature controller combines the easy operation and unsurpassed reliability of the Model 330 with improved sensor input and interface flexibility, including compatibility with negative temperature coefficient (NTC) resistance temperature detectors (RTDs). Backed by the Lake Shore tradition of excellence in cryogenic sensors and instrumentation, the Model 331 temperature controller sets the standard for mid-price range temperature control instruments.

Device Specification: here

Manufacturer card: LAKESHORE

Supporting advanced scientific research, Lake Shore is a leading global innovator in measurement and control solutions.

• Headquarters: Westerville, Ohio, USA
• Yearly Revenue (millions, USD): 21.4
• Vendor Website: here

Connect to the Lakeshore 331 in Python

Read our guide for turning Python scripts into Flojoy nodes.

Flojoy

PROTOCOLS > SCPI

📄 IDN

Query a device's identity through the universal *IDN? SCPI command.

📄 MEASURE VOLTAGE

Query an instrument's measured output voltage, such as a DMM or power supply.

📄 SCPI WRITE

Write a SCPI command to a connected bench-top instrument and return the result.

PyMeasure

from pymeasure.instruments.lakeshore import LakeShore331

# Connect to the Lakeshore 331 Temperature Controller
controller = LakeShore331("GPIB::1")

# Print the current setpoint for output 1
print(controller.output_1.setpoint)

# Change the setpoint for output 1 to 50 K
controller.output_1.setpoint = 50

# Change the heater range for output 1 to 'low'
controller.output_1.heater_range = 'low'

# Wait for the temperature at input A to stabilize
controller.input_A.wait_for_temperature()

# Print the temperature at input A
print(controller.input_A.temperature)

This script first imports the LakeShore331 class from pymeasure.instruments.lakeshore. It then creates an instance of the LakeShore331 class, passing the GPIB address of the temperature controller as the argument.

The script then demonstrates some basic operations with the temperature controller. It prints the current setpoint for output 1, changes the setpoint to 50 K, changes the heater range to ‘low’ for output 1, waits for the temperature at input A to stabilize, and finally prints the temperature at input A.

Note that you will need to have the pymeasure package installed in order to run this script.