MEASURE_SETTINGS_2450

Changes the measurement settings for the 2450. Use the MEASURE_READ_2450 block to return a measurement. Requires a CONNECT_2450 block to create the connection. Params: connection : VisaConnection The VISA address (requires the CONNECTION_2450 block). measure : select, default=voltage Select the measure unit wires : select, default=2 Select 2-wire or 4-wire sense mode. digits : select, default=6.5 Select the number of display digits. meas_range : int, default=0 The measurement range. 0 == AUTO. Returns: out : TextBlob Measurement

Python Code

from typing import Optional, Literal
from flojoy import VisaConnection, flojoy, DataContainer, TextBlob


@flojoy(deps={"tm_devices": "1.0"}, inject_connection=True)
def MEASURE_SETTINGS_2450(
    connection: VisaConnection,
    input: Optional[DataContainer] = None,
    measure: Literal["voltage", "current", "resistance", "power"] = "voltage",
    wires: Literal["2", "4"] = "2",
    digits: Literal["3.5", "4.5", "5.5", "6.5"] = "6.5",
    meas_range: float = 0,
) -> TextBlob:
    """Changes the measurement settings for the 2450.

    Use the MEASURE_READ_2450 block to return a measurement.

    Requires a CONNECT_2450 block to create the connection.

    Parameters
    ----------
    connection : VisaConnection
        The VISA address (requires the CONNECTION_2450 block).
    measure : select, default=voltage
        Select the measure unit
    wires : select, default=2
        Select 2-wire or 4-wire sense mode.
    digits : select, default=6.5
        Select the number of display digits.
    meas_range : int, default=0
        The measurement range. 0 == AUTO.

    Returns
    -------
    TextBlob
        Measurement
    """

    # Retrieve oscilloscope instrument connection
    smu = connection.get_handle()

    smu.commands.smu.measure.displaydigits = f"smu.DIGITS_{digits[0]}_5"

    match measure:
        case "current":
            smu.commands.smu.measure.func = "smu.FUNC_DC_CURRENT"
        case "voltage":
            smu.commands.smu.measure.func = "smu.FUNC_DC_VOLTAGE"
        case "resistance":
            smu.commands.smu.measure.func = "smu.FUNC_DC_RESISTANCE"
        case "power":
            smu.commands.smu.measure.func = "smu.FUNC_DC_POWER"

    if wires == "2":
        smu.commands.smu.SENSE_2WIRE
    else:
        smu.commands.smu.SENSE_4WIRE

    if meas_range == 0:
        smu.commands.smu.measure.autorange = "smu.ON"
    else:
        smu.commands.smu.measure.range = meas_range

    return TextBlob(text_blob=f"Measure {measure}")

Find this Flojoy Block on GitHub

Example

Having problems with this example app? Join our Discord community and we will help you out!

Press enter or space to select a node.You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.

Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.

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.