def measureVoltage(val, compVoltage, autoRange, rangeValue, state, nplc):
try:
keithley = Keithley2461("keithley", KEITHLEY_IP_ADDRESS,
KEITHLEY_SOCKET_PORT,
KEITHLEY_COMMAND_TERMINATOR)
keithley.communicator.configure()
keithley.reset()
keithley.sourceFunction('CURR')
keithley.sourceValue('CURR', val)
keithley.sourceVoltageLimit(compVoltage)
keithley.senseFunction('VOLT')
if autoRange:
keithley.senseAutoRange('VOLT', 'ON')
else:
keithley.senseAutoRange('VOLT', 'OFF')
keithley.senseFunctionRange('VOLT', rangeValue)
keithley.senseVoltRsen(state)
voltage = keithley.readVoltage(nplc)
keithley.closeConnection()
return voltage
except Exception as e:
raise e
finally:
if not Keithley2461.isConnectionClosed():
keithley.closeConnection()
def generatePulseAndMeasureFromKeithley(pulseLevel, pulseWidth, timeDelay,
numberOfPulses, nplc):
try:
keithley = Keithley2461("keithley", KEITHLEY_IP_ADDRESS,
KEITHLEY_SOCKET_PORT,
KEITHLEY_COMMAND_TERMINATOR)
keithley.communicator.configure()
keithley.reset()
keithley.sourceFunction('CURR')
keithley.senseFunction('VOLT')
keithley.senseFunctionNPLC('VOLT', nplc)
keithley.senseAutoRange('VOLT', 'ON')
keithley.sourcePulseTrain('CURR', pulseLevel, pulseWidth,
numberOfPulses, 'ON', timeDelay)
keithley.startPulse()
keithley.wait()
print "sleep %f" % (
(pulseWidth + timeDelay) * numberOfPulses * 3 + 0.1)
sleep((pulseWidth + timeDelay) * numberOfPulses * 3 + 0.1)
data = keithley.readTraceData(numberOfPulses)
keithley.closeConnection()
return data
except Exception as e:
raise e
finally:
if not Keithley2461.isConnectionClosed():
keithley.closeConnection()
def measureResistance(count):
try:
keithley = Keithley2461("keithley", KEITHLEY_IP_ADDRESS,
KEITHLEY_SOCKET_PORT,
KEITHLEY_COMMAND_TERMINATOR)
keithley.communicator.configure()
keithley.reset()
keithley.sourceFunction('CURR')
keithley.senseFunction('RES')
keithley.senseAutoRange('RES', 'ON')
keithley.senseResistanceCompensated('ON')
resistance = keithley.readResistance(count)
keithley.closeConnection()
return resistance
except Exception as e:
raise e
finally:
if not Keithley2461.isConnectionClosed():
keithley.closeConnection()
def generateVoltagePulseFromKeithley(pulseLevel, pulseWidth, timeDelay, numberOfPulses):
try:
keithley = Keithley2461("keithley", KEITHLEY_IP_ADDRESS, KEITHLEY_SOCKET_PORT, KEITHLEY_COMMAND_TERMINATOR)
keithley.communicator.configure()
keithley.reset()
keithley.sourceFunction('VOLT')
keithley.senseFunction('CURR')
keithley.senseAutoRange('CURR', 'ON')
keithley.sourcePulseTrain('VOLT', pulseLevel, pulseWidth, numberOfPulses, 'OFF', timeDelay)
keithley.startPulse()
keithley.wait()
print "sleep %f" % ((pulseWidth+timeDelay)*numberOfPulses*3+0.1)
sleep((pulseWidth+timeDelay)*numberOfPulses*3+0.1)
except Exception as e:
raise e
finally:
keithley.closeConnection()
def generatePulseLinearSweepFromKeithley(sourceFunc, senseFunc, stop, pulseWidth, timeDelay, numberOfPulses):
try:
keithley = Keithley2461("keithley", KEITHLEY_IP_ADDRESS, KEITHLEY_SOCKET_PORT, KEITHLEY_COMMAND_TERMINATOR)
keithley.communicator.configure()
keithley.reset()
keithley.sourceFunction(sourceFunc)
keithley.senseFunction(senseFunc)
keithley.senseAutoRange(senseFunc, 'ON')
keithley.sourcePulseLinearSweep(sourceFunc, stop, pulseWidth, timeDelay, numberOfPulses)
keithley.startPulse()
keithley.wait()
print "sleep %f" % ((pulseWidth+timeDelay)*numberOfPulses*3+0.1)
sleep((pulseWidth+timeDelay)*numberOfPulses*3+0.1)
except Exception as e:
raise e
finally:
keithley.closeConnection()