def startup(self):
log.info("Setting up Multimeters")
self.mm1 = Keithley2000(self.mm1_address)
self.mm2 = Keithley2000(self.mm2_address)
self.mm3 = Keithley2000(self.mm3_address)
self.mm4 = Keithley2000(self.mm4_address)
if self.mm1_measurement:
self.mm1.measure_voltage(self.mm1_range)
else:
self.mm1.measure_current(self.mm1_range)
if self.mm2_measurement:
self.mm2.measure_voltage(self.mm2_range)
else:
self.mm2.measure_current(self.mm2_range)
if self.mm3_measurement:
self.mm3.measure_voltage(self.mm3_range)
else:
self.mm3.measure_current(self.mm3_range)
if self.mm4_measurement:
self.mm4.measure_voltage(self.mm4_range)
else:
self.mm4.measure_current(self.mm4_range)
log.info("Setting up Thermocouple")
self.mm2.voltage_nplc = 1 # Integration constant to Medium
self.mm3.voltage_nplc = 1 # Integration constant to Medium
self.mm4.voltage_nplc = 1 # Integration constant to Medium
sleep(2)
def startup(self):
log.info("Setting up instruments")
self.meter = Keithley2000("GPIB::25")
self.meter.measure_voltage()
self.meter.voltage_range = self.voltage_range
self.meter.voltage_nplc = 1 # Integration constant to Medium
self.source = Keithley2400("GPIB::1")
self.source.apply_current()
self.source.source_current_range = self.max_current * 1e-3 # A
self.source.compliance_voltage = self.voltage_range
self.source.enable_source()
sleep(2)
##This is a generic code to measure resistance using DC Keithley 2400 and nvm, it does not record any other values
## It will sweep a current from the set min current to the set max current with the given steps
"""
### Import ###
#Required packages
import numpy as np
import time
#Drivers
from pymeasure.instruments.keithley import Keithley2400
from pymeasure.instruments.keithley import Keithley2000
nvm = Keithley2000("GPIB::15")
source = Keithley2400("GPIB::21")
### Setup nvm ###
### Setup 2400 ###
currentmax = 1e-6
currentmin = 0
currentstep = 1e-8
currentrange = int((currentmax-currentmin)/currentstep+1)
source.apply_current()
print(nvm.voltage) #Test the nvm connection
nvm.beep_state = 'disabled'
timeinterval = args.interval
else:
timeinterval = 1 # this corresponds to 1 measurement / second
df = pd.DataFrame(
dict(time=[],
temp=[],
tempres=[],
rho=[],
resistivity=[],
read_pressure=[],
read_pvoltage=[],
pressure_sample=[]))
LS = LS350(None, 'GPIB::9::INSTR')
KTmult = Keithley2000('GPIB::14::INSTR')
KTmult.measure_voltage(max_voltage=10, ac=False)
fig = plt.figure()
grid = gridspec.GridSpec(2, 2, figure=fig)
ax1 = fig.add_subplot(grid[0, 0])
ax1.set_xlabel("T (K)")
ax1.set_ylabel(r"$\rho$ ($\Omega$ m)")
ax1.ticklabel_format(axis='y', style='sci', scilimits=(0, 2))
line0, = ax1.plot(df['temp'], df['rho'], 'k.-')
ax2 = fig.add_subplot(grid[1, 0])
ax2.set_xlabel("time")
# ax2.set_ylabel(r"$\rho$ ($\Omega$ m)")
ax2.set_ylabel(r"R ($\Omega$)")