rtan/CryostatB-FieldMeasurementScript
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Read Serial-Nr. and checks the limits of the device

Browse Source
This commit is contained in:
Ryan Tan 2024-07-15 10:53:35 +02:00
parent c090976d99
commit 130fdfbab1
1 changed files with 30 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
20240709SerdarModScript.py
View File

@ -351,11 +351,10 @@ def write_no_echo(instr:pyvisa.resources.Resource, command:str, sleeptime=0.01)-
except pyvisa.VisaIOError as e:
print(f"Error communicating with instrument: {e}")
# TODO: implement the reverse scan and zero when finish functionality
# receive values in units of T, rescale in kg to talk with the power supplyy. 1T = 10kG
def sweep_b_val(instr:pyvisa.resources.Resource, min_bval:float, max_bval:float,
res:float, Settings:str, base_file_name='', path_save="C:/Users/localadmin/Desktop/Users/Lukas/2024_02_08_Map_test",
singlepowersupply_bool=False, reversescan_bool=False, zerowhenfin_bool=False)->None:
reversescan_bool=False, zerowhenfin_bool=False)->None:
""" this function performs a sweep of the B field of the chosen magnet coil. It creates a list o B values from the given min and max values, with the given resolution. For each value, a measurement of the spectrum
of the probe in the cryostat is made, using the LightField spectrometer.
@ -375,26 +374,44 @@ def sweep_b_val(instr:pyvisa.resources.Resource, min_bval:float, max_bval:float,
ValueError: when By limit is exceeded.
ValueError: when Bz limit is exceeded.
ValueError: when Bx limit is exceeded.
ConnectionError: when no device is connected.
""" ''''''
if base_file_name =='':
base_file_name = datetime.datetime.now().strftime('%Y_%m_%d_%H.%M')
start_time = time.time()
start_time = time.time() # start of the scan function
# TODO: queries the serial number of the device, and from there, check the if the input limits exceed the recommended limits
instr_info = query_no_echo(instr, '*IDN?')
instr_bsettings = list(sep_num_from_units(el) for el in query_no_echo(instr, 'UNITS?;LLIM?;ULIM?').split(';')) # deliver a 3 element tuple of tuples containing the set unit, llim and ulim
if instr_bsettings[0][0] == 'T':
instr_bsettings[1][0] = instr_bsettings[1][0]*0.1 # rescale kG to T, device accepts values only in kG or A, eventho we set it to T
instr_bsettings[2][0] = instr_bsettings[2][0]*0.1
if singlepowersupply_bool: # checks limits of Bx or By
# if singlepowersupply_bool: # checks limits of Bx or By
# if (min_bval< -BY_MAX) or (max_bval > BY_MAX):
# raise ValueError('Input limits exceed that of the magnet By! Please input smaller limits.')
# elif '1' in query_no_echo(instr, 'CHAN?'): # check if its the coils for Bz
# if (min_bval < -BZ_MAX) or (max_bval > BZ_MAX):
# raise ValueError('Input limits exceed that of the magnet (Bz)! Please input smaller limits.')
# else: # checks limits of Bx
# if (min_bval< -BX_MAX) or (max_bval > BX_MAX):
# raise ValueError('Input limits exceed that of the magnet Bx! Please input smaller limits.')
if '2101014' in instr_info: # single power supply
if (min_bval< -BY_MAX) or (max_bval > BY_MAX):
raise ValueError('Input limits exceed that of the magnet By! Please input smaller limits.')
elif '1' in query_no_echo(instr, 'CHAN?'): # check if its the coils for Bz
elif '2301034' in instr_info: # dual power supply
if '1' in query_no_echo(instr, 'CHAN?'): # check if its the coils for Bz
if (min_bval < -BZ_MAX) or (max_bval > BZ_MAX):
raise ValueError('Input limits exceed that of the magnet (Bz)! Please input smaller limits.')
else: # checks limits of Bx
if (min_bval< -BX_MAX) or (max_bval > BX_MAX):
raise ValueError('Input limits exceed that of the magnet Bx! Please input smaller limits.')
else:
raise ConnectionError('Device is not connected!')
write_no_echo(instr, f'LLIM {min_bval*10};ULIM {max_bval*10}') # sets the given limits, must convert to kG for the device to read
bval_lst = np.arange(min_bval, max_bval + res, res) # creates list of B values to measure at, with given resolution, in T
@ -476,6 +493,8 @@ def sweep_b_val(instr:pyvisa.resources.Resource, min_bval:float, max_bval:float,
elapsed_time = (end_time - start_time) / 60
print('Scan time: ', elapsed_time, 'minutes')
write_no_echo(instr, f'LLIM {instr_bsettings[1][0]*10};ULIM {instr_bsettings[2][0]*10}') # reset the initial limits of the device after the scan
if zerowhenfin_bool:
write_no_echo(instr, 'SWEEP ZERO') # if switched on, discharges the magnet after performing the measurement loop above
@ -560,11 +579,10 @@ experiment_name = f"{set_llim_bval}T_to_{set_ulim_bval}T_{set_res_bval}T_{dateti
# perform the B-field measurement for selected axis above
# sweep_b_val(powerbox_dualsupply, set_llim_bval, set_ulim_bval, set_res_bval, experiment_settings, experiment_name)
sweep_b_val(powerbox_dualsupply, set_llim_bval, set_ulim_bval, set_res_bval,
experiment_settings, experiment_name, singlepowersupply_bool=False, zerowhenfin_bool=True, reversescan_bool=False)
experiment_settings, experiment_name, zerowhenfin_bool=True, reversescan_bool=False)
# Internally, axes are numbered 0 to 2
write_no_echo(powerbox_dualsupply, 'LOCAL') # turn off the remote mode
# time.sleep(0.5)
powerbox_dualsupply.close()