Commit d233eb9d authored by Daniel Friesel's avatar Daniel Friesel
Browse files

add --voltage-only, --current-only. Up to 24 Hz sample rate now!

parent 3b9c08c0

README.md

+1 −1
Original line number Diff line number Diff line
@@ -12,7 +12,7 @@ through voltage/current slopes for automated I-V curve measurements. 
It has been successfully used with "RND 320-KA3005P" (single-channel) and "RND

320-KA3305P" (dual-channel) supplies. Observed attributes:



* Time resolution: **a few Hz**

* Time resolution: 10 .. 24 Hz

* Voltage range: 0 .. 30 V

* Voltage resolution: 10 mV

* Current range: 0 .. 5 A

bin/korad-logger

+23 −3
Original line number Diff line number Diff line
@@ -253,6 +253,8 @@ def measure_data( 
    voltage_range=(None, None, None),

    current_range=(None, None, None),

    on_off=False,

    log_voltage=True,

    log_current=True,

):

    global terminate_measurement
@@ -311,8 +313,14 @@ def measure_data( 
    print("# Timestamp Voltage Current", file=output_handle)

    while not terminate_measurement:

        ts = time.time()

        if log_current:

            current = korad.get_current()

        else:

            current = None

        if log_voltage:

            voltage = korad.get_voltage()

        else:

            voltage = None

        if voltage is not None and current is not None:

            print(f"{ts:.3f} {voltage:5.2f} {current:5.3f}", file=output_handle)

        elif voltage is not None:
@@ -527,6 +535,11 @@ def main(): 
        metavar="START STOP STEP",

        help="Vary voltage limit from START to STOP over the course of the measurement. Adjust by STEP V per second.",

    )

    parser.add_argument(

        "--voltage-only",

        action="store_true",

        help="Log voltage only (ignore current readings). Useful to increase sample rate for CC measurements.",

    )

    parser.add_argument(

        "--current-limit",

        type=float,
@@ -538,6 +551,11 @@ def main(): 
        metavar="START STOP STEP",

        help="Vary current limit from START to STOP over the course of the measurement. Adjust by STEP A per second.",

    )

    parser.add_argument(

        "--current-only",

        action="store_true",

        help="Log current only (ignore current readings). Useful to increase sample rate for CV measurements.",

    )

    parser.add_argument(

        "--on-off",

        action="store_true",
@@ -600,6 +618,8 @@ def main(): 
            voltage_range=voltage_range,

            current_range=current_range,

            on_off=args.on_off,

            log_voltage=not args.current_only,

            log_current=not args.voltage_only,

        )



    data = parse_data(log_data, skip=args.skip, limit=args.limit)