Connecting to 2500A Bridge by Andeen Hagerling in Python

Instrument Card

The AH 2500A offers unparalleled stability, resolution and accuracy in a capacitance/loss1 bridge (whether manual or automatic)

Device Specification: here

Manufacturer card: ANDEEN HAGERLING

Andeen-Hagerling, Inc. - manufacturers of the world’s most accurate capacitance bridges and standards

• Headquarters: US
• Yearly Revenue (millions, USD): 1
• Vendor Website: here

Demo: Record voltage over time with an Agilent 34401A multimeter

Connect to the 2500A Bridge 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.adapters import VISAAdapter
from pymeasure.instruments import AH2500A

# Create a VISA adapter for communication
adapter = VISAAdapter("GPIB0::1::INSTR")

# Connect to the AH2500A instrument
multimeter = AH2500A(adapter)

# Perform a single capacitance and loss measurement
capacitance, loss, voltage = multimeter.caplossvolt

# Print the measurement values
print(f"Capacitance: {capacitance} pF")
print(f"Loss: {loss} nS")
print(f"Voltage: {voltage} V")

# Disconnect from the instrument
multimeter.disconnect()

Explanation:

1. We import the necessary modules from Pymeasure: VISAAdapter for communication and AH2500A for the 2500A Bridge Multimeter instrument.
2. We create a VISAAdapter object, specifying the appropriate address for the instrument. In this example, we assume the instrument is connected via GPIB at address 1.
3. We create an AH2500A object, passing the adapter as an argument to establish the connection.
4. We use the caplossvolt measurement property of the AH2500A object to perform a single capacitance and loss measurement. This property returns a tuple of capacitance, loss, and voltage values.
5. We print the measurement values using f-strings.
6. We disconnect from the instrument using the disconnect() method of the AH2500A object.

Note: Make sure you have the necessary dependencies installed, such as pymeasure, pyvisa, and the appropriate VISA library for your instrument.