CONNECT_2450

Open a VISA connection to an Keithley 2450 SourceMeter. Params: device : VisaDevice The connected VISA device. Returns: device_addr : TextBlob The IP or VISA address of the VISA device.

Python Code

from flojoy import VisaDevice, flojoy, TextBlob
from flojoy.connection_manager import DeviceConnectionManager


@flojoy(deps={"tm_devices": "1.0"})
def CONNECT_2450(
    device: VisaDevice,
) -> TextBlob:
    """Open a VISA connection to an Keithley 2450 SourceMeter.

    Parameters
    ----------
    device: VisaDevice
        The connected VISA device.

    Returns
    -------
    device_addr: TextBlob
        The IP or VISA address of the VISA device.
    """

    device_addr = device.get_address()

    smu = DeviceConnectionManager.tm.add_smu(device_addr)
    smu.write("*LANG TSP")
    lang = smu.query("*LANG?")
    if lang != "TSP":
        raise ValueError(
            "Command set language not set correctly. Try setting to 'TSP' manually."
        )

    DeviceConnectionManager.register_connection(device, smu)

    return TextBlob(text_blob=device_addr)

Find this Flojoy Block on GitHub

Example

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Download this Flojoy App

In this example, a Keithley 2450 to generate 1V and then sweep between 0 and 1V.

First the necessary blocks were added:

• CONNECT_2450
• BEEP_2450
• RESET_2450
• SOURCE_2450
• MEASURE_SETTINGS_2450
• MEASUREMENT_READ_2450
• IV_SWEEP_2450
• BIG_NUMBER
• LINE

The instrument address was set for each 2450 block. The SOURCE_2450 block was changed in order to source 1V. The parameters in the MEASURE_SETTINGS_2450 block were changed as necessary. The MEASUREMENT_READ_2450 block was connected to the BIG_NUMBER block in order to view the reading.

The IV_SWEEP_2450 block output was connected to the LINE plot to show the output of the sweep.

The blocks were connected as shown and the app was run.