def setPhotometerActive(self, enable):
""" console command accessed via equivalent ICP command 'ph+' or 'ph-':
switch modes to count with the photometer """
if enable: # enable the photometer, make Count command do PhotometerCount
if self.photometer is None:
try:
self.photometer = Photometer()
self.write('counter set to be photometer with MAS-345 voltmeter')
self.write('range set to %s' % self.photometer.getRangeString())
except: self.write("loading photometer driver failed")
if self.photometer is not None:
self.Count = self.PhotometerCount
self._photometer_active = True
else: # disable it, re-enable pencil detector, make Count do PencilCount
self.Count = self.PencilCount
self._photometer_active = False
class PhotometerControlMixin:
"""
Adds photometer interaction to InstrumentController
Use as a Mixin class (needs methods from InstrumentController), i.e.
class NewIC(InstrumentController, PSDControllerMixin):
pass
or use helper function Mixin:
Mixin(InstrumentController, PhotometerControlMixin)
"""
def __init__(self):
# ICP commands
self.ph = self.setPhotometerActive
self.photometer = None
self.setPhotometerActive(True) #start with photometer detector by default
self.pr = self.printPhotometerRange
self.sr = self.setPhotometerRange
def getPhotometerActive(self):
""" Returns true if the voltmeter is the active counter """
return self._photometer_active
def setPhotometerActive(self, enable):
""" console command accessed via equivalent ICP command 'ph+' or 'ph-':
switch modes to count with the photometer """
if enable: # enable the photometer, make Count command do PhotometerCount
if self.photometer is None:
try:
self.photometer = Photometer()
self.write('counter set to be photometer with MAS-345 voltmeter')
self.write('range set to %s' % self.photometer.getRangeString())
except: self.write("loading photometer driver failed")
if self.photometer is not None:
self.Count = self.PhotometerCount
self._photometer_active = True
else: # disable it, re-enable pencil detector, make Count do PencilCount
self.Count = self.PencilCount
self._photometer_active = False
def setPhotometerRange(self, range_index):
self.photometer.setRangeIndex(range_index)
self.write('range set to %s' % self.photometer.getRangeString())
def printPhotometerRange(self):
self.write('range setting %d: %s' % (self.photometer.getRangeIndex(), self.photometer.getRangeString()))
def PhotometerCount(self, duration, pause_time = 1.0, reraise_exceptions = False):
""" PhotometerCount(self, duration, pause_time=1.0, reraise_exceptions = False):
Count using the MAS-345 voltmeter connected to photometer """
photometer = self.photometer
duration = abs(int(round(float(duration))))
# duration is interpreted as number of samples -
# there is a pause of 1 sec between readings, so it is like time in seconds
if duration < 1: duration = 1
values = []
for i in range(duration):
if self._aborted:
print "\nAborting"
break
value, units = photometer.readValue()
values.append(value)
start_time = time.time()
while (time.time() - start_time) < pause_time:
if self._aborted:
print "\nAborting"
#self.scaler.AbortCount()
#if not reraise_exceptions:
# self._aborted = False
break
time.sleep(self.loopdelay)
count_time = duration
monitor = duration
elapsed_time = duration
counts = sum(array(values))
result = {'count_time': count_time, 'monitor': monitor, 'counts': counts, 'elapsed_time': elapsed_time, 'photometer_range': photometer.getRangeString()}
self.state['result'].update(result)
return result
