Reading speed test for Siglent Multimeters

siglent_sdm.py

#! /usr/bin/env python3
import pyvisa as visa
from serial.serialutil import SerialException
import time


def main():
    # Get list of connected devices
    rm = visa.ResourceManager()
    device_list = {}
    for device_name in rm.list_resources():
        print(device_name)
        device_id = ""
        try:
            device_id = rm.open_resource(device_name).query("*IDN?")
        except (visa.VisaIOError, FileNotFoundError, SerialException):
            pass
        if "sdm" in device_name.lower(): # Add only devices which names contain "sdm"
            if device_name not in device_list:
                device_list[device_name] = rm.open_resource(device_name)

    for name in device_list.keys():
        device = device_list[name]
        device.timeout = 200000
        print(name.split("::")[3])
      
        device.write("SAMP:COUNT 1")
        cumulative_voltage = 0
        start_time = time.time()
        for i in range(500):
            voltage = device.query("READ?")
            cumulative_voltage += float(voltage)
        end_time = time.time()
        print(f"Time: {end_time - start_time}")
        print(f"Time per read: {(end_time - start_time) / 500}")
        print(f"Average voltage: {cumulative_voltage / 500}")

        device.write("SAMP:COUNT 10000")
        device.write("TRIG:COUNT 1")
        start_time = time.time()
        result = device.query("READ?")
        end_time = time.time()
        print(f"Time: {end_time - start_time}")
        print(f"Time per read: {(end_time - start_time) / 10000}")
        print(f"Voltage: {sum([float(voltage) for voltage in result.split(',')]) / 10000}")
        print(f"Number of reads: {len(result.split(','))}")


if __name__ == "__main__":
    main()