counter.reset()
counter.setupFast()
counter.write(":FUNC 'FREQ 1'")
counter.setupGating(0.1)
# Setting up multimeter Agilent - 34401
multi = AgilentMultimeter(gpib=multigpib)
if multi == None:
exit
multi.reset()
# Resistance measurement - 2 Wire
multi.write("CONF:RESISTANCE")
multi.write("RESISTANCE:NPLC 0.2")
multi.write("TRIG:SOUR IMM")
# Need to do one reading to set up Wait-For-Trigger state!
multi.ask("READ?")
# Setting up output file
datafile = "beatohm_%s.log" % (strftime("%y%m%d_%H%M%S"))
out = file(datafile, "a")
out.write("#Time(UnixTime) BeatFrequency(Hz) Voltage(V)\n")
# Do logging until stopped by Ctrl-C
while True:
try:
start = time()
counter.initMeasure()
resistance = float(multi.ask("READ?"))
freq = counter.getFreq()
now = time()
measuretime = (now + start) / 2
counter.reset()
counter.setupFast()
counter.write(":FUNC 'FREQ 1'")
counter.setupGating(gatetime)
# Setting up multimeter
multi = AgilentMultimeter(gpib = multigpib) if multigpib else None
if multi:
multi.reset()
# 5-1/2 digits fast
multi.write("CONF:VOLT:DC %d" %(vrange))
multi.write("VOLT:DC:NPLC 0.2")
multi.write("TRIG:SOUR IMM")
# Need to do one reading to set up Wait-For-Trigger state!
multi.ask("READ?")
# Setting up output file
datafile = "freqlog_%s.log" %(strftime("%y%m%d_%H%M%S"))
out = file(datafile, 'a')
header = ["#Time(UnixTime)"]
if counter:
header += ["BeatFrequency(Hz)"]
if multi:
header += ["Voltage(V)"]
header += ["\n"]
out.write(" ".join(header))
# Do logging until stopped by Ctrl-C
while True:
try:
# Config settings
multigpib = 6
# Setting up multimeter Agilent - 34401
multi = AgilentMultimeter(gpib = multigpib)
if (multi == None):
exit
multi.reset()
# Resistance measurement - 2 Wire
multi.write("CONF:VOLTAGE")
multi.write("VOLTAGE:RESOLUTION MAX")
multi.write("VOLTAGE:NPLC 10")
multi.write("TRIG:SOUR IMM")
# Need to do one reading to set up Wait-For-Trigger state!
multi.ask("READ?")
# Setting up output file
logger.info("#Time(UnixTime) Voltage(V)")
# Do logging until stopped by Ctrl-C
while True:
try:
start = time()
voltage = float(multi.ask("READ?"))
now = time()
measuretime = (now + start) / 2
elapsed = now - start
result = array([[measuretime, voltage]])
logger.info("%f %s" % (measuretime, voltage))
print "%f V / %f s" %(voltage, elapsed)
