Connecting to 2700A Bridge by Andeen Hagerling in Python

Instrument Card

The Andeen-Hagerling AH 2700A offers unparalleled stability, resolution, linearity and accuracy in a multi-frequency capacitance/loss bridge. Its numerous state-of-the-art features make it an exceptionally user-friendly instrument, measuring capacitance and loss in medium and high impedance ranges, and thus allows using three-terminal rather than five-terminal connections to the DUT (Device Under Test).

The new AH 2700A-E offers substantially improved resolution over the entire operating range, bringing a super-sensitivity that enables it to explore applications in calibration, scientific research, and manufacturing with a new precision.

The AH2700A-E is the pinnacle of decades of Andeen-Hagerling experience in bridge design and manufacture, and is complemented by its sister model, the AH2700A-E-C that offers continuous frequency scanning.

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 2700A 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

To connect to a 2700A Bridge Multimeter using Pymeasure, you can use the following Python script:

from pymeasure.instruments import Instrument
from pymeasure.adapters import VISAAdapter
from pymeasure.instruments.validators import strict_range
from .ah2500a import AH2500A
from .ah2700a import AH2700A

# Create a VISA adapter for communication
adapter = VISAAdapter("GPIB0::12::INSTR")

# Create an instance of the AH2700A instrument
bridge = AH2700A(adapter)

# Connect to the instrument
bridge.open()

# Perform measurements or other operations
idn = bridge.id
print("Instrument ID:", idn)

config = bridge.config
print("Configuration:", config)

frequency = bridge.frequency
print("Frequency:", frequency)

# Reset the instrument
bridge.reset()

# Trigger a new measurement
bridge.trigger()
# Close the connection to the instrument
bridge.close()

This script creates a VISA adapter to establish communication with the instrument. Then, it creates an instance of the AH2700A class, which represents the Andeen Hagerling 2700A Precision Capacitance Bridge instrument. The open() method is used to connect to the instrument.

After connecting, you can perform various operations on the instrument. The id attribute retrieves the instrument identification, the config attribute reads out the configuration, and the frequency attribute gets or sets the test frequency used for measurements.

The reset() method resets the instrument, and the trigger() method triggers a new measurement without blocking. Finally, the close() method is used to close the connection to the instrument.