T7Pro.py
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from abstract_instrument import abstract_instrument
from labjack import ljm
import numpy
#==============================================================================
ALL_VAL_TYPE = "TEMP, RES"
#==============================================================================
class T7Pro(abstract_instrument):
def __init__(self, adress="192.168.0.26", vtype="TEMP"):
self.adress = adress
self.vtype = vtype
self.names = ["TEMPERATURE_AIR_K",
"CURRENT_SOURCE_200UA_CAL_VALUE",
"AIN0",# "AIN1",
"AIN2",# "AIN3",
"AIN4",# "AIN5",
"AIN6",# "AIN7"
]
def model(self):
return 'T7Pro'
def connect(self):
try:
print('Connecting to device @%s...' %(self.adress))
self.handle = ljm.openS("T7", "ETHERNET", self.adress)
self.configureAINs()
print(' --> Ok')
print(self.model())
if self.vtype == "TEMP":
1
elif self.vtype == "RES":
1
else:
print("Wrong -v argument")
raise
except Exception as er:
print("Unexpected error during connection: " + str(er))
raise
def getValue(self):
results = self.read(self.names)
temp = results[0]
res1 = results[2]/results[1]
res2 = results[3]/results[1]
res3 = results[4]/results[1]
res4 = results[5]/results[1]
if self.vtype == 'TEMP':
# Temperature calculation
temp1 = self.res2tempSensor(628, res1)
temp2 = self.res2tempSensor(16947, res2)
temp3 = self.res2tempSensor(625, res3)
temp4 = self.res2tempSensor(100, res4)
string = '%f\t%f\t%f\t%f\t%f\n'%(temp, temp1, temp2, temp3, temp4)
elif self.vtype == 'RES':
string = '%f\t%f\t%f\t%f\t%f\n'%(temp, res1, res2, res3, res4)
else:
string = ''
return string
def read(self, names):
return ljm.eReadNames(self.handle, len(names), names)
def disconnect(self):
ljm.close(self.handle)
def send(self, command):
pass
def configureAINs(self):
# Setup and call eWriteNames to configure AINs on the LabJack.
names = ["AIN0_NEGATIVE_CH", "AIN0_RANGE", "AIN0_RESOLUTION_INDEX",
#"AIN1_NEGATIVE_CH", "AIN1_RANGE", "AIN1_RESOLUTION_INDEX",
"AIN2_NEGATIVE_CH", "AIN2_RANGE", "AIN2_RESOLUTION_INDEX",
#"AIN3_NEGATIVE_CH", "AIN3_RANGE", "AIN3_RESOLUTION_INDEX",
"AIN4_NEGATIVE_CH", "AIN4_RANGE", "AIN4_RESOLUTION_INDEX",
#"AIN5_NEGATIVE_CH", "AIN5_RANGE", "AIN5_RESOLUTION_INDEX",
"AIN6_NEGATIVE_CH", "AIN6_RANGE", "AIN6_RESOLUTION_INDEX",
#"AIN7_NEGATIVE_CH", "AIN7_RANGE", "AIN7_RESOLUTION_INDEX"
]
l_names = len(names)
aValues = [1, 1, 12,
#199, 0.01, 0,
3, 1, 12,
#199, 0.01, 0,
5, 1, 12,
#199, 0.01, 0,
7, 0.1, 12,
#199, 0.01, 0
]
ljm.eWriteNames(self.handle, l_names, names, aValues)
# print("\nSet configuration:")
# for i in range(len(names)):
# print(" %s : %f" % (names[i], aValues[i]))
def res2tempSensor(self, sensor, res):
if sensor==627:
K = [0.399341181655472610,
10.8420092277810909,
-26.4597939187660813,
245.9828566655493379,
-668.069876596331596,
1001.69882618263364,
-267.272089680656791]
if sensor==625:
K = [0.333548856582638109,
11.7361551595386118,
-31.32988932320903987,
262.878643524833024,
-704.163538021035492,
1056.6040485650301,
-307.057196729816496]
if sensor==628:
K = [0.463200932294057566,
13.5049710820894688,
-30.5191222755238414,
231.098593852017075,
-550.122691885568202,
806.038547554984689,
-198.510489917360246]
if sensor==16945:
K = [3.2497, 5.1777, 2.499]
if sensor==16943:
K = [3.4738, 5.1198, 2.3681]
if sensor==16944:
K = [3.3674, 5.2874, 2.5165]
if sensor==16941:
K = [2.9486, 4.5862, 2.266]
if sensor==16947:
K = [3.4597, 5.2422, 2.4169]
if sensor==100:
K = [0.003850]
return self.res2temp(K, res)
def res2temp(K, res):
temp = 0
tmp = 1000./res
if len(K)==7:
for i in range(len(K)):
temp += K[i]*tmp**i
if len(K)==3:
for i in range(len(K)):
temp += K[i]*numpy.log10(tmp)**(2-i)
temp = 10**temp
if len(K)==1:
temp = (res/100.-1)/K[0]+273.15
return temp