44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
import pyvisa
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import time
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class LakeShore218:
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def __init__(self,adress):
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#establish connection to device with pyvisa. The device is initiallized with visa adress "adress"
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self.rm = pyvisa.ResourceManager()
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try:
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self.inst = self.rm.open_resource(adress)
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except:
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print(f'could not connect to {adress}')
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return
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time.sleep(1)
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def __del__(self):
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self.rm.close()
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def read(self,CH):
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#reads temperature Data in Kelvin from channels specified in CH. CH can be 1-8 for integer output of Channel CH.
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#if CH=0 the output is a List of all 8 channels. CH can be a List (e.g. [1,4,7]) for the output of a List of specific channels.
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if isinstance(CH, int): #if CH is a integer: Read a single channel
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if CH>=0 and CH<9:
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command = f'KRDG? {CH}'
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data = str(self.inst.query(command))
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data = data.split(',') #Split string in single objects (important for CH=0)
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data = [float(i) for i in data]
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time.sleep(0.1)
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elif isinstance(CH, list): #if CH is a list: Read all specified channels manually.
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data = []
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for i in CH:
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command = f'KRDG? {i}'
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data_single = float(self.inst.query(command))
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data.append(data_single)
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time.sleep(0.1)
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else:
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data = [0]
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return data
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