Connecting to Keithley 2400 by Keithley in Python

Instrument Card

Keithley’s Standard Series 2400 Source Measure Unit (SMU) Instruments offer four-quadrant precision voltage and current source/load coupled with measurement. Each SMU instrument is both a highly stable DC power source and a true instrument-grade 6½-digit multimeter. The power source characteristics include low noise, precision, and readback. The multimeter capabilities include high repeatability and low noise.

Device Specification: here

Manufacturer card: KEITHLEY

Keithley Instruments is a measurement and instrument company headquartered in Solon, Ohio, that develops, manufactures, markets, and sells data acquisition products, as well as complete systems for high-volume production and assembly testing.

• Headquarters: Cleveland, Ohio, United States
• Yearly Revenue (millions, USD): 110.6
• Vendor Website: here

Demo: Measure a solar panel IV curve with a Keithley 2400

Connect to the Keithley 2400 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.keithley import Keithley2400

# Connect to the Keithley 2400
keithley = Keithley2400("GPIB::1")

# Configure the measurement settings
keithley.measure_voltage()
keithley.voltage_range = 10
keithley.voltage_nplc = 1

# Enable the source and set the voltage
keithley.enable_source()
keithley.source_voltage = 5

# Perform a measurement
voltage = keithley.voltage
print("Measured voltage:", voltage)

# Disable the source and disconnect from the instrument
keithley.disable_source()
keithley.disconnect()

This script connects to a Keithley 2400 Power Supply using the GPIB interface (replace “GPIB::1” with the appropriate address for your setup). It configures the instrument to measure voltage, sets the voltage range and integration time, enables the source, sets the desired voltage, performs a measurement, and then disables the source and disconnects from the instrument.

Note: Make sure you have the pymeasure package installed before running this script.